JPH0534487B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for regenerating a particulate collection filter in a diesel engine.

Diesel engine exhaust gas contains particulate, which is a combustible, fine-grained carbonized compound, and this is the main cause of black smoke in the exhaust gas. This particulate hydrate has a temperature of exhaust gas
If the temperature exceeds 500 to 600 degrees Celsius, it will spontaneously ignite and burn when the vehicle is under high speed and under high load.
(accounting for more than 30% of the total amount), they are released directly into the atmosphere.

However, since particulate matter is harmful to the human body, vehicles generally have diesel particulate collection filters installed in their exhaust paths.

By the way, as this filter is used, it tends to collect particulate matter and block the exhaust passage, and in order to regenerate this filter, a device for re-burning the particulate matter is usually installed. For example, it is known that reburning can be carried out by using various burners, by retarding the injection pump, and by discharging exhaust gas containing large amounts of carbon monoxide compounds, which are activated by oxidation catalysts to make them highly combustible. There is.

Of these, the latter method has the advantage of not requiring a separate burner, etc., but it is only possible to obtain a regenerable exhaust gas temperature because the operating region Frequently occurring area Y
(See Figure 1) cannot be reproduced.

Furthermore, as the injection timing is moved in the retard direction β (see Fig. 2), the temperature at the center of the oxidation catalyst in the exhaust passage, for example, increases as shown in Fig. 2 (along the broken line); Along with this, the maximum output tends to decrease significantly. In this case, in order to maintain the same output as before starting regeneration, it is necessary to significantly increase the accelerator lever opening θ.
This change in the opening degree of the accelerator lever greatly deteriorates driving operability and poses many dangers in terms of safety.

The present invention aims to solve these problems, and makes it possible to re-burn particulate regardless of engine driving conditions and without deteriorating driveability.
An object of the present invention is to provide a particulate collection filter regeneration device for a diesel engine.

Therefore, the particulate collection filter regeneration device for a diesel engine of the present invention includes a particulate collection filter that is disposed in the exhaust passage of the diesel engine and that collects particulate matter discharged from the combustion chamber of the diesel engine, and and a filter regeneration means that operates to regenerate the particulate collection filter by burning the particulate when the particulate collection filter collects the particulate, wherein the elapsed time during the operation of the filter regeneration means is A first timer means for measuring the temperature, a temperature detection means for detecting the temperature of the particulate collection filter or the exhaust passage adjacent to the particulate collection filter, and a temperature detection means for detecting the temperature of the particulate collection filter or the exhaust passage adjacent to the particulate collection filter; second timer means for measuring at least one of the time during which the detected temperature is lower than the set temperature or the other time during which the detected temperature is higher than the set temperature within the elapsed time; Based on the measurement result of the first timer means and the measurement result of the second timer means, before the elapsed time reaches the first set time, the other time is shorter than the first set time. The present invention is characterized by comprising a control means for terminating the operation of the filter regeneration means when it is detected that the set time has come.

Furthermore, the particulate collection filter regeneration device for a diesel engine of the present invention includes a particulate collection filter that is disposed in an exhaust passage of the diesel engine and that collects particulate matter discharged from a combustion chamber of the diesel engine, and and a filter regenerating means that operates to regenerate the particulate collection filter by burning the particulate when the particulate is collected by the filter, wherein particulate is collected in the particulate collecting filter. a regeneration actuation means for detecting this and actuating the filter regeneration means; and a first timer means for measuring the elapsed time while the filter regeneration means is in operation;
Temperature detection means for detecting the temperature of the particulate collection filter or the exhaust passage adjacent to the particulate collection filter, and a state in which the detected temperature is lower than the set temperature within the elapsed time based on the detection result of the temperature detection means. a second timer means for measuring at least one of the time during which the detected temperature is higher than the set temperature within the elapsed time; and the measurement result of the first timer means. and detects that the other time becomes a second set time shorter than the first set time before the elapsed time reaches the first set time based on the measurement result of the second timer means. control means for terminating the operation of the filter regeneration means when the filter regeneration means is activated, and the other time is set to the second set time based on the measurement result of the first timer means and the measurement result of the second timer means. a reset means for resetting the measurement result of the first timer means and the measurement result of the second timer means when it is detected that the elapsed time reaches the first set time before the second timer means; The present invention is characterized in that it includes a prohibition means which operates in priority to the regeneration operation means and prohibits the operation of the filter regeneration means when the reset means is operated continuously.

Further, the particulate collection filter regeneration device for a diesel engine of the present invention includes a particulate collection filter disposed in the exhaust passage of the diesel engine to collect particulate matter discharged from the combustion chamber of the diesel engine;
and filter regeneration means that operates to regenerate the particulate collection filter by burning the particulate when particulate is collected by the particulate collection filter, the particulate collection filter or the particulate Temperature detection means for detecting the temperature of the exhaust passage adjacent to the collection filter, and based on the detection result of the temperature detection means, the detected temperature is higher than the set temperature during the elapsed time during the operation of the filter regeneration means. A regeneration time measuring timer means for measuring time and a time period during which the detected temperature is lower than the set temperature out of the elapsed time during the operation of the filter regeneration means based on the detection result of the temperature detection means. When the timer means for measuring non-reproducing time and the timer means for measuring non-reproducing time reach another set time before the measurement result of the timer means for measuring non-reproducing time reaches another set time, the filter is activated. The present invention is characterized by comprising a control means for terminating the operation of the regeneration means.

Furthermore, the particulate collection filter regeneration device for a diesel engine of the present invention includes a particulate collection filter that is disposed in an exhaust passage of the diesel engine and that collects particulate matter discharged from a combustion chamber of the diesel engine, and and a filter regenerating means that operates to regenerate the particulate collection filter by burning the particulate when the particulate is collected by the filter, wherein particulate is collected in the particulate collecting filter. a regeneration actuating means for detecting this and activating the filter regenerating means; a temperature detecting means for detecting the temperature of the particulate collection filter or the exhaust passage adjacent to the particulate collection filter; and a detection result of the temperature detecting means. regeneration time measuring timer means for measuring the time during which the detected temperature is higher than the set temperature out of the elapsed time during the operation of the filter regeneration means based on the temperature detection means; A timer means for measuring non-regeneration time which measures the time during which the detected temperature is lower than the set temperature during the operation of the means, and a set time at which the measurement result of the timer means for measuring non-regeneration time is determined. control means for terminating the operation of the filter regeneration means when the measurement result of the reproduction time measurement timer means reaches another set time before the measurement result of the reproduction time measurement timer means reaches another set time; When the measurement result of the non-playback time measurement timer means reaches the set time before the set time, the measurement result of the playback time measurement timer means and the measurement of the non-playback time measurement timer means are performed. The present invention is characterized by comprising a reset means for resetting the result, and a prohibition means for operating in priority over the regeneration operation means and prohibiting the operation of the filter regeneration means when the reset means is activated continuously. .

Furthermore, the particulate collection filter regeneration device for a diesel engine of the present invention includes a particulate collection filter that is disposed in an exhaust passage of the diesel engine and that collects particulate matter discharged from a combustion chamber of the diesel engine, and and a filter regeneration means that operates to regenerate the particulate collection filter by burning the particulate when particulate is collected by the filter, and measuring the elapsed time while the filter regenerating means is in operation. a first timer means for detecting the temperature of the particulate collection filter or the exhaust passage adjacent to the particulate collection filter; a second timer means for measuring at least one of the time during which the detected temperature is lower than the set temperature or the other time during which the detected temperature is higher than the set temperature; a determining means for determining whether or not regeneration of the particulate collection filter is completed based on the measurement results of the first timer means and the second timer means; display means for displaying at least one of completion or incompleteness of the reproduction; the determination means determines the elapsed time based on the measurement result of the first timer means and the measurement result of the second timer means; It is determined that the regeneration of the particulate collection filter is completed when it is detected that the other time reaches a second set time shorter than the first set time before the time reaches the first set time. It is characterized by being configured to

Further, the particulate collection filter regeneration device for a diesel engine of the present invention includes a particulate collection filter disposed in the exhaust passage of the diesel engine to collect particulate matter discharged from the combustion chamber of the diesel engine;
filter regeneration means that operates to regenerate the particulate collection filter by burning the particulate when the particulate collection filter collects the particulate a first timer means for measuring elapsed time; a temperature detection means for detecting the temperature of the particulate collection filter or the exhaust passage adjacent to the particulate collection filter; and a first timer means for measuring the elapsed time based on the detection result of the temperature detection means. a second timer that measures at least one of the time during which the detected temperature is lower than the set temperature or the other time during which the detected temperature is higher than the set temperature during the elapsed time; and the other time is set to a second time based on the measurement result of the first timer means and the measurement result of the second timer means.
The elapsed time mentioned above reaches the second set time.
a reset means for resetting the measurement result of the first timer means and the measurement result of the second timer means when it is detected that the first set time has reached a time longer than the set time of the second timer means; The present invention is characterized by comprising a regeneration-impossible display means for displaying that the particulate collection filter cannot be regenerated when operated continuously.

Furthermore, the particulate collection filter regeneration device for a diesel engine of the present invention includes a particulate collection filter that is disposed in an exhaust passage of the diesel engine and that collects particulate matter discharged from a combustion chamber of the diesel engine, and a filter regenerating means that operates to burn particulate when particulate is collected by the filter to regenerate the particulate collecting filter, the particulate collecting filter or the particulate collecting filter; Temperature detection means for detecting the temperature of an adjacent exhaust passage, and timer means for measuring regeneration time that measures the time during which the detected temperature is higher than the set temperature within the elapsed time based on the detection result of the temperature detection means. a timer means for measuring non-regeneration time, which measures the time during which the detected temperature is lower than the set temperature within the elapsed time based on the detection result of the temperature detection means; and a timer means for measuring regeneration time. and determining means for determining whether or not the regeneration of the particulate collection filter is completed based on the measurement results of the non-regeneration time measuring timer means and the regeneration timer means for measuring the non-regeneration time; display means for displaying at least one of completed and uncompleted, and the discriminating means determines whether or not the playback is complete based on the measurement result of the playback time measurement timer means and the measurement result of the non-playback time measurement timer means. To determine that the regeneration of the particulate collection filter is completed when the measurement result of the regeneration time timer means reaches another set time before the measurement result of the timer means reaches a certain set time. It is characterized by being structured.

Further, the particulate collection filter regeneration device for a diesel engine of the present invention includes a particulate collection filter disposed in the exhaust passage of the diesel engine to collect particulate matter discharged from the combustion chamber of the diesel engine;
and filter regeneration means that operates to regenerate the particulate collection filter by burning the particulate when particulate is collected by the particulate collection filter, the particulate collection filter or the particulate A temperature detection means for detecting the temperature of the exhaust passage near the collection filter, and a regeneration time for measuring the time during which the detected temperature is higher than the set temperature within the elapsed time based on the detection result of the temperature detection means. a measuring timer means, a non-regeneration time measuring timer means for measuring the time during which the detected temperature is lower than the set temperature within the elapsed time based on the detection result of the temperature detection means; When the measurement result of the timer means for time measurement reaches a certain set time but the measurement result of the timer means for measuring playback time does not reach another set time, the measurement result of the timer means for measuring playback time and reset means for resetting the measurement result of the timer means for measuring non-regeneration time, and regeneration impossible display means for indicating that regeneration of the particulate collection filter is impossible when the reset means is activated continuously. It is characterized by having the following.

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 3 to 18 show a particulate collection filter regeneration device in a diesel engine as a first embodiment of the present invention, and FIG. 3 is a schematic configuration diagram thereof; Fig. 4 is a sectional side view of the main part of the injection amount adjusting means, Fig. 5 is a schematic configuration diagram of the retardation device, Fig. 6 is a total injection amount isocurve per stroke of the engine equipped with this device, and Fig. 7 The figure is a retard amount isocurve diagram for the engine equipped with this device, Figure 8 is an isocurve diagram for the increased injection amount per stroke based on the accelerator lever opening degree of the engine equipped with this device, and Figure 9 is the isocurve diagram for the engine equipped with this device. Fig. 10 is an explanatory diagram of the injection amount at a constant engine rotation speed; Fig. 11 is an isometric diagram of the exhaust temperature of the engine with the regenerator shown in Fig. 6; Fig. 12a - d are all flowcharts to explain their effects, Figures 13 to 15 are diagrams to explain their correction coefficient characteristics, Figure 16 is their intake throttling amount characteristic diagram, and Figures 17 and 18. are an intake throttle amount characteristic diagram and a fuel increase characteristic diagram, respectively, for suppressing the rise in filter temperature.

As shown in Fig. 3, the particulate collection filter regeneration device (hereinafter simply referred to as the regeneration device) is
Diesel engine (hereinafter simply referred to as engine)
A diesel particulate collection filter (hereinafter simply referred to as a filter) 3, which is attached to the exhaust passage 2 of the engine 1 and which collects particulate which is discharged from the combustion chamber of the engine 1, is regenerated. .

An exhaust manifold 4 fixed to the engine 1, an oxidation catalyst (hereinafter referred to as a front catalyst) 5 and a filter 3 attached following the exhaust manifold 4 and supported on a base having a ceramic honeycomb structure.
An exhaust passage 2 is formed by connecting a muffler (not shown) and the like through an exhaust pipe.

Note that the filter 3 is formed of a heat-resistant ceramic foam with a catalyst.

Pressure sensors 7A and 7 are provided in the exhaust passages 2 on the inflow and outflow sides of the filter 3, respectively, for detecting the exhaust pressure at that position and outputting a detection signal to the controller 6, which will be described later.
B is attached.

Further, a temperature sensor 40 is provided as a temperature detection means for detecting the temperature (or exhaust gas temperature) Tf of the filter 3 or the exhaust passage 2 adjacent thereto, and a detection signal from this temperature sensor 40 is input to the controller 6. be done.

Further, a bypass passage 41 is connected to the exhaust passage 2, and one end of the bypass passage 41 is connected to the exhaust passage 2 upstream of the position where the filter 3 is disposed, and the other end is connected to the exhaust passage 2 upstream of the position where the filter 3 is disposed. It is connected to the exhaust passage 2 on the downstream side of the filter arrangement position without passing through the filter 3.

Note that the other end of the bypass passage 41 may be communicated with the atmosphere.

An electromagnetic on-off valve 42 is interposed in the bypass passage 41, and this on-off valve 42 is opened and closed in response to a control signal from the controller 6.

A fuel injection pump 8 attached to the engine 1 is a distribution pump, and is equipped with a hydraulic automatic timer 9 as a timing means, and an injection amount adjusting means 10 that can adjust the amount of fuel injected per injection. An accelerator opening sensor 12 that detects an accelerator lever opening θ and outputs the detected accelerator lever opening θ to the controller 6 is attached to the accelerator 11 that operates the injection amount adjusting means.

Note that reference numeral 13 indicates a rotation speed sensor that detects the rotation speed Ne of the engine 1.

As shown in FIG. 4, the injection amount adjusting means 10 of the injection pump 8 moves a spill ring 15, which is slidably fitted onto a plunger 14 that reciprocates in the direction of the arrow, in a fuel increasing direction f and a fuel decreasing direction e. Perform movement operations.

Reference numeral 16 indicates a drive shaft, and this drive shaft 16 drives a governor 17 that is interlocked therewith. The operating force of the governor 17 acts on the control lever 19 via the weight sleeve 18. A supporting lever 20 that pivotally supports the upper end of the control lever 19 is connected to a guide lever 20 through a fulcrum pin 22 together with a tension lever 21.
It is supported by 3. This guide lever 23 is pivotally connected to a pin 24 fixed to the base, and its upper end faces a fuel increase device 25 constituting filter regeneration means.

Note that the lower end of the supporting lever 20 is formed with a spherical portion 201, which slideably projects into the recessed portion of the spill ring 15.

Reference numeral 26 indicates a compression spring, which urges the spill ring 15 in the fuel reduction direction e.

The fuel increase device 25 includes a fuel increase screw 27 screwed into the base, a reduction gear 28 integrated with the screw 27, a motor 29 that transmits rotational force to the gear 28, and a rotation angle of the reduction gear 28, that is, the rotation angle of the increase screw 27. Position sensor 30 that detects and outputs
It is formed by The position sensor 30 feeds back to the controller 6 a detection signal corresponding to the rotation angle of the screw 27 in the fuel increasing direction i, that is, the fuel increasing amount ΔQ, from the home position h of the increasing screw 27.

On the other hand, the drive shaft 16 of the injection pump 8
is connected to a gear train (not shown) on the engine 1 side via an injection timing retardation device (hereinafter simply referred to as retardation device) 31 constituting filter regeneration means as shown in FIG. The retard device 31 transmits the rotational force from the engine 1 to the drive shaft 16 via the planetary gear train 32, fixes the input side ring gear 321 in the planetary gear train 32, and hydraulically controls the output side ring gear 322. Piston 3 in cylinder 33
4, a phase difference is created between the input and output in the crank angle range of 0° to 60°.

The hydraulic cylinder 33 has a retard angle chamber 331 and an advance angle chamber 33.
2, and these two chambers 331 and 332 have
Pressure oil from an oil pump 36 is supplied via an electromagnetic spool valve 35. This electromagnetic spool valve 35 moves the piston 34 by a predetermined amount each time it receives an output signal of a certain time width from the controller 6.

The reference numeral 37 indicates an oil filter, the reference numeral 38 indicates a relief valve, and the reference numeral 39 indicates a position sensor that generates a detection signal corresponding to the amount of movement of the piston 34 from the home position h'.

The electromagnetic spool valve 35 is switched in response to an output signal from the controller 6, and at this time, the amount of movement of the piston 34 corresponding to the amount of retardation is fed back to the controller 6 as a detection signal.

an intake manifold 43 fixed to the engine 1;
Intake passage 44 formed by an intake pipe etc. that follows this
In order from the upstream side (atmospheric side), there are an air cleaner and an intake throttle valve 45 constituting the filter regeneration means.
is installed.

The intake throttle valve 45 is driven to open and close by a pressure responsive device 47. Pressure response device 4
7 is an atmospheric passage 473 that guides atmospheric pressure Vat into a pressure chamber 472 partitioned by a diaphragm 471 connected to a rod that drives the intake throttle valve 45;
It is connected to a vacuum passage 474 that guides vacuum Vvac from a vacuum pump or the like, and electromagnetic on-off valves 475 and 476 are interposed in these passages 473 and 474, respectively.

And the solenoid of each on-off valve 475, 476
A control signal is supplied from the controller 6 to Pvent and Pvac.

Further, one end of a passage 46 for exhaust gas recirculation (hereinafter referred to as EGR) is open in the intake passage 44 on the downstream side of the intake throttle valve 45 .

Note that the other end of the EGR passage 46 opens into a portion of the exhaust passage 2 between the exhaust manifold 4 and the front catalyst 5.

An EGR valve 48 is provided at the intake passage side opening of the EGR passage 46, and the EGR valve 48 is driven to open and close by a pressure response device 49. The pressure response device 49 has its EGR valve 48
A diaphragm 49 connected to a rod that drives the
An atmospheric passage 493 for introducing atmospheric pressure Vat and a vacuum passage 494 for introducing vacuum Vvac from a vacuum pump or the like are connected to a pressure chamber 492 partitioned by 1, and these passages 493, 4
94 are electromagnetic on-off valves 495 and 496, respectively.
is interposed.

A control signal is supplied from the controller 6 to the solenoid of each on-off valve 495, 496.

Note that the opening degree of the intake throttle valve 45 is detected by a feedback signal to the controller 6 from a pressure sensor 50 attached to the intake passage 44 on the downstream side of the intake throttle valve installation position.
The opening degree is detected from a feedback signal to the controller 6 from the potentiometer 51 which detects the movement of the rod of the pressure responsive device 49.

Further, the opening degree of the intake throttle valve 45 may be detected by a feedback signal to the controller 6 from the potentiometer 52 which detects the movement of the rod of the pressure responsive device 47.

Of course, the pressure sensor 50 and potentiometer 5
The opening degree of the intake throttle valve 45 may be detected using the signal from 2 in combination.

Next, such engine 1 is driven and the sixth
The measurement data shown in Figures 9 through 9 was obtained. First, the 6th
The figure shows the relationship between the engine speed and the average effective pressure when the pre-catalyst 5 is maintained at 700° C. as an isocurve of the total injection amount Q per stroke of the injection pump. FIG. 7 shows the relationship between the engine rotational speed and the average effective pressure when the pre-catalyst 5 is maintained at 700° C. as a retardation amount α isocurve. FIG. 8 shows the relationship between the engine rotational speed and the accelerator lever opening θ when the pre-catalyst 5 is maintained at 700° C., as an isocurve of the increased injection amount ΔQ per stroke of the injection pump. FIG. 9 shows the relationship between the engine rotational speed and the accelerator lever opening degree θ when the pre-catalyst 5 is maintained at 700° C. as a retard amount α isocurve. Of these, if the total injection amount Q per stroke in FIG. 6 is taken out along the average effective pressure, assuming that the engine rotational speed is constant, and this is plotted, FIG. 10 is obtained. At this time, the injection pump is retarded by the retardation amount α shown in FIG. In this case, the total injection amount Q ₁ per stroke at steady state at each average effective pressure is shown by a broken line, and the difference between the two is the fuel increase amount ΔQ
It is becoming.

However, this increased fuel ΔQ significantly reduces the thermal efficiency of the engine 1 by setting the retardation amount α, so that it does not appear as an increase in the average effective pressure as effective work of the engine 1, but is released as heat loss. In other words, the amount of heat equivalent to the total amount of fuel Q per stroke is the sum of the amount of work and heat loss, but here, by setting the retard amount α, the amount of heat equivalent to the amount of fuel increase ΔQ is completely reduced to heat loss. This suppresses the increase or decrease in the amount of work itself. Note that the incompletely combusted exhaust gas, which results in heat loss, is oxidized by the pre-stage catalyst 5 and the catalyst on the filter to generate combustion heat.

That is, by increasing the fuel injection amount and delaying the injection timing at the same time (retarding), the exhaust gas temperature increases, the particulate on the filter 3 can be burned, and the filter 3 should be able to be regenerated.

Furthermore, Figure 11 shows the relationship between the engine rotation speed and the average effective pressure when the front stage catalyst is maintained at 700℃.
It is shown as an isocurve of the inlet temperature of the front stage catalyst.

By the way, the pressure sensor 7 is connected to the controller 6.
In addition to receiving detection signals from A, 7B, 50, accelerator opening sensor 12, rotation speed sensor 13, position sensors 30, 39, temperature sensor 40, and potentiometers 51, 52, a water temperature sensor detects water temperature Tw. 53, vehicle speed sensor 54 that detects vehicle speed V
In response to these signals, the controller 6 performs the following processes, and sends control signals suitable for each process to the fuel injection amount increasing motor 29 and the injection timing retard electromagnetic motor 29. Spool valve 35, intake throttle valve opening adjustment opening/closing valve 47
5,476, EGR valve opening adjustment on-off valve 495,
496, bypass passage on-off valve 42, indicator 55
It is now output to .

Note that the display device 55 is disposed at a suitable location within the vehicle interior, for example, on an instrument panel.

Hereinafter, the processing performed by the controller 6 will be explained using the flowcharts shown in FIGS. 12a to 12d. This flow is triggered by a timer interrupt signal that interrupts at a predetermined timing. First, in step a1, the filter temperature Tf of the exhaust passage 2,
Water temperature Tw, integral particulate rate information Np (this information Np can be obtained based on the pressure difference between upstream and downstream of the filter 3 or the integral amount of engine rotational speed Ne), engine rotational speed Ne, intake passage pressure
Pr, accelerator lever opening θ, vehicle speed V, actual retard amount Δαr, etc. are input from each of the above-mentioned sensors.

Next, in step a2, the filter temperature Tf is read, and in step a3, this temperature Tf is changed to _T1.
(=600) or more is judged.

If the filter temperature Tf is lower than 600°C, the NO route is taken and it is determined in step a4 whether the prohibition flag is cleared.

The prohibition flag is a flag that is set when filter regeneration fails or when regeneration is impossible, as will be described later.

Normally the prohibition flag is cleared, so
Taking the YES route, it is determined in step a5 whether or not the playback flag is cleared. Since the regeneration flag is set after the timer A set process performed in step a11, which will be described later, it is initially cleared, so that the YES route is taken in step a5, and then the water temperature Tw is set in step a6. Loaded.

Then, in step a7, Tw≧T ₃ (=50℃)
If the water temperature Tw is low, no further processing is performed and the process returns.

However, if Tw≧T ₃ (=50°C), the particulate accumulation information Np is read in step a8, and it is determined in step a9 whether Np≧k. If it is not full, no further processing is performed and the process returns.

Furthermore, if Np≧k, it means that the filter 3 is clogged with particulate matter. Therefore, in order to regenerate the filter, first, in step a10, the EGR valve 48 is closed, and the EGR valve 48 is closed.
is released, and then, in step a11, timer A is set to A= _A0 , and then, in step a12, a regeneration flag is set.

Note that A ₀ (second set time) is set, for example, on the order of several tens of seconds (20 to 40 seconds).

The processing in steps a8 and a9 is performed by filter 3.
This is done by a regeneration actuating means which detects that the particulate is collected and activates the filter regenerating means. Further, in step a12', a reproduction start display (displayed on the display 55) is made.

The reason why EGR is canceled here is to avoid complicating filter regeneration control.

Since the regeneration flag is set at step a12, unless the regeneration flag is cleared, the NO route is taken at step a5, and steps a6 to a
12, a12' processing is jumped.

Next, in step a13, the vehicle speed V and the accelerator lever opening θ are read, and the operating state of the engine 1 is determined in step a14. That is, in step a14, it is determined whether the vehicle is idling or stopped.

This determination is made because the filter regeneration process is different when the vehicle is idling or during a power outage and when the vehicle is running.

Therefore, if it is determined in step a14 that the vehicle is running, a running regeneration processing routine a15 suitable for filter regeneration while the vehicle is running is executed.
If it is determined that the vehicle is idling or stopped, a stop regeneration processing routine a16 suitable for filter regeneration while idling or stopped is executed.

In the driving regeneration processing routine a15, it is first determined in step a17 whether the stop flag has been cleared, and if it has not been cleared, the process proceeds to step a1.
At step 8, the stop regeneration is canceled, and at step a19 it is determined whether the running flag has been cleared.

Moreover, if the stop flag is cleared, the process of step a19 is directly performed.

At first, the running flag is cleared, so take the YES route at step a19, and then step a20.
Then, timer B (first timer means) is set to B= _B0 and counting is started.

Note that the time B ₀ (first set time) set by the timer B is, for example, about several minutes (2 to 4 minutes).

Then, in step a21, the running flag is set, and in step a22, the stop flag is cleared.

Thereafter, in step a23, the engine rotational speed Ne and the accelerator lever opening degree θ are read.

Note that since the running flag was set in step a21, unless the running flag is cleared,
At step a19, the NO route is taken, and the processing at steps a20 to a22 is skipped.

After step a23, in step a24, the retard amount Δα, fuel increase amount ΔQ, and throttle amount Pc of the intake throttle valve 45 are searched from the first table on the map in the memory.

Here, setting Pc in addition to Δα and ΔQ is as follows:
This is to reduce the flow rate of air flowing into the filter 3 by appropriately throttling the intake air during filter regeneration, and to control the rise time and rise rate of the exhaust gas temperature.

When this intake throttle amount characteristic is shown using the accelerator lever opening degree θ as a parameter, it becomes as shown in FIG. 16. From this figure, it can be seen that the smaller the accelerator lever opening θ, the larger the intake throttle amount, that is, the intake throttle amount is set to an excessive throttle.

Subsequently, in step a25, an acceleration/deceleration correction coefficient Sp is set as shown in FIG. 13 in accordance with the rate of change dθ/dt of the accelerator lever opening θ.

Then, in step a26, the target retard amount Δα is set, in step a27, the actual retard amount Δαr is read, and in step a28, Δα'=
Δα−Δαr is calculated, and in step a29, the fuel correction coefficient Kα and the intake throttle amount correction coefficient Kα′ are set according to Δα′, as shown in FIGS. 14 and 15, and in step a30, the fuel increase amount is The calculation ΔQc=KαΔQ is performed, and at step a31, the calculation ΔQc=KαΔQ is performed, and the intake throttle amount Pcc=SpKα′Pc is also performed.

Here, calculate Qc by multiplying ΔQ by Kα, and Pc=
The reason why Pcc is calculated by multiplying Sp′ by Kα′ is as follows.

That is, this is because the response delay in the operation of the retardation device 31 is larger than that in the operation of the pressure response device 47 in which the fuel increase device 25 drives the intake throttle valve 45 .

If a target value signal is given simultaneously to the devices 25, 47 with a small response delay and the device 31 with a large response delay, the devices 25, 47 will reach the target value immediately, but after a considerable delay, the device 31 will reach the target value. As a result, proper filter regeneration cannot be performed in this transient state.

Therefore, the actual retard amount Δαr of the device 31 with a large response delay is measured, the correction coefficients Kα and Kα′ are calculated based on the difference Δα′ from the target value Δα, and Kα and Pc are set in ΔQ _1.
By multiplying by Kα', it was decided to operate the devices 25 and 47 in keeping with the response delay of the device 31. By controlling in this way, proper filter regeneration can be performed in the above-mentioned transient state (actually, the transient state occupies a considerable portion).

In addition, when calculating Pcc, the acceleration/deceleration correction coefficient Sp
The reason for multiplying is for the following reason.

First, a coefficient that compensates for response delay during acceleration and deceleration.
This is to reduce the influence of Kα′ and create a sense of acceleration and deceleration. In other words, as mentioned above, due to the effect of Kα', the intake throttle amount changes in accordance with the response delay of the retardation device 31, so even during acceleration/deceleration, the intake throttle amount changes only slowly. As a result, there is no sense of acceleration or deceleration.

Therefore, a correction coefficient Sp having a characteristic as shown in FIG. 13 was set so that the intake throttling amount changes rapidly during acceleration and deceleration.

Second, the purpose is to improve acceleration/deceleration performance by going further than compensating for the response delay described above. That is, the characteristics of the correction coefficient Sp are set to change more than the value necessary to compensate for response delay during acceleration and deceleration.

In addition, in FIG. 13, the characteristics indicated by the broken line are as follows.
The characteristics shown by solid lines are those set only to compensate for response delay, and the characteristics shown by solid lines are those set to further improve acceleration/deceleration performance.

Regarding fuel, the reason why it is not corrected like the intake throttling amount during acceleration and deceleration is that in the structure shown in FIG. .

Multiplying by Kα is performed in step a30, and since Kα is a meaningful correction coefficient when the accelerator lever opening degree θ does not change, priority is given to depressing the accelerator 11 during acceleration and deceleration, and the fuel becomes responsive. It is often increased or decreased.

Then, in step a32, it is determined whether the time set by timer B is 0 (B=0?). If it is not 0, it is returned.

If B=0, the reset means cancels running regeneration in step a33, and clears the running flag in step a34.

Next, to explain the stop regeneration processing routine a16, after taking the YES route in step a14, it is determined in step a35 whether or not the driving flag is cleared, and if it is not cleared,
At step a36, running regeneration is canceled, and at step a37 it is determined whether the stop flag has been cleared.

Further, if the running flag is cleared, the process of step a37 is directly performed.

At first, the stop flag is cleared, so in step a38, timers C, D, and E (timer E; first timer means) are set as C=C ₀ , D=D ₀ , and E=E ₀ and the counter starts. do. For example,
C ₀ is set to about 10 seconds, D ₀ is set to about 20 to 30 seconds, and E ₀ (first set time) is set to about 1 to 3 minutes.

Then, in step a39, a stop flag is set, and in step a40,
The running flag is cleared.

In addition, since the stop flag was set in step a39, unless the stop flag is cleared, the NO route is taken in step a37 and the process returns to step a.
The processing from 38 to a40 is jumped.

Thereafter, in step a41, it is determined whether or not the time set by timer C is 0 (C=0?). If C≠0, in step a42, the retard amount is set to Δα, the intake throttle amount is set to _P1 , and the fuel Return the increase as ΔQ ₁ .

If C=0, that is, after about 10 seconds have passed, it is determined in step a43 whether or not the time set by timer D is 0 (D=0?).
If D≠0, in step a44, the retard amount Δα,
Leave the fuel increase ΔQ ₁ unchanged and change the intake throttle amount to P ₁
It is returned with a smaller amount of _P2 .

When the timers C and D are set in this way, the fuel is increased by ΔQ ₁ and retarded by Δα, and the intake throttle valve 45 is set to a slight throttle opening P ₁ , and then for about 10 seconds, for example. As time passes, the intake throttle valve 45 reaches an excessive throttle opening degree P ₂ while ΔQ ₁ and Δα remain as they are.

As described above, in the pre-stage where a light throttling operation is performed, the temperature of the front-stage catalyst 5 rises in a short time due to the sufficient amount of oxygen in the exhaust gas, and furthermore, in the stage where an excessive throttling operation is performed subsequently, The temperature Tf of the filter 3 is maintained at a high temperature necessary for re-combustion due to the heat of the rapid reaction of a large amount of combustible components within the pre-catalyst 5, which allows the combustion to be carried out in a short period of time without emitting harmful gases during the regeneration operation. Filter 3 is regenerated.

After that, D=0. i.e. 20 after the start
When ~30 seconds have elapsed, in step a45, timer E is activated.
It is determined whether the set time is 0 (E=0?), and if E≠0, in step a46, the retard is canceled and the predetermined intake throttle amount _{P3 is}
and fuel increase ΔQ ₂ are set and then returned.

Here, the intake throttle amount of _P3 is smaller than that of _P1 .
In other words, this is the lightest amount of aperture.

Further, ΔQ ₂ is set as ΔQ ₂ <<ΔQ ₁ .

As described above, after 20 to 30 seconds have elapsed after the timer start, the particulate hydrate usually burns and the temperature rises to a high temperature state, and this high temperature causes negative effects such as burning out of the filter 3. Step a46 is a process for suppressing temperature rise in order to avoid such adverse effects.

It can also be said that this is a process that precedes the subsequent filter temperature rise suppression process.

That is, the process of step a46 increases the oxygen concentration, increases the amount of exhaust gas, and suppresses the temperature rise of the filter 3.

When E=0, that is, about 1 to 3 minutes have passed after the timer is started, the reset means cancels the stop regeneration in step a47, and clears the stop flag in step a48.

By the way, if the particulate in the filter 3 burns out after running regeneration processing or stop regeneration processing is performed, the filter temperature Tf exceeds 600°C (T ₁ ), so we take the YES route in step a3 and proceed to step a49. It is determined whether the time set by timer A has elapsed (A=0?), and if it has not elapsed, A is set as A-1 in step a50. That is, by subtracting (counting down) by 1, in step a51, the filter temperature Tf becomes T ₂ (=
900℃) or higher.

Here, if Tf≧T ₂ (=900°C), the temperature rises too much and has a negative impact on the exhaust system, such as burning out the filter 3, so the temperature rise suppression processing routine a62 is executed. This will be discussed later.

If NO is determined in step a51, it is determined in step a52 whether or not the suppression release flag is cleared. If the temperature rise suppression processing routine a62 is not executed, the suppression cancellation flag is cleared, but if it is executed, the suppression cancellation flag is set, and accordingly, YES or NO is selected in step a52. be judged.

If you take the NO route, step a53,
At a54 and a55, processing for clearing the suppression flag, clearing the suppression cancellation flag, and canceling the suppression is performed in this order.

After that, in step a56, is A=0 again? is asked, and if NO, the processing from step a13 onwards is performed.

If YES in step a52, the process in step a56 (A=0?) is directly performed. Further, after passing through step a54, the YES route is always taken at step a52.

On the other hand, step a56 [processing of this a56,
The processing in steps a11, a49, and a50 is performed by a timer means or a second timer means or a regeneration means that measures the time during which the filter temperature Tf is higher than the set temperature (600°C) out of the elapsed time during which the filter regeneration means is in operation. If YES, that is, timer A
When the time set in step a5 has passed, proceed to step a5.
At step 7, it is determined whether the playback flag is cleared, and if it is cleared, the process returns. With this process, if the filter temperature Tf is 600° C. (T ₁ ) or higher from the beginning of the flow, the filter regeneration means will not work.

If NO at step a57, in this case it means that the filter regeneration means has completed the regeneration, so at step a58, the regeneration incomplete display (step a74 described later) is canceled.
By canceling (erasing) the regeneration start display, a regeneration completion display (displayed on the display 55) is performed, and in step a59, running regeneration is canceled, stop regeneration is canceled, and EGR is restored. Thereafter, in step a60, N=0 and Rn=0 (Rn: number of reproduction repetitions) are set, and in step a61, the driving flag is cleared, the stop flag is cleared, and the reproducing flag is cleared, and the process returns.

If YES in step a51, that is, the filter temperature Tf is 900°C or higher, step a8
In step 6, it is determined whether the bypass passage 41 is open, and if it is open, the bypass passage 41 is closed (step a87). If not, step a87 is jumped, and for safety, the temperature rise suppression processing routine a62 is executed. executed. In this temperature rise suppression process a62, first, in step a63, it is determined whether the suppression flag is cleared. Since it is initially cleared, the YES route is taken and the suppression release flag is set at step a64, the suppression flag is set at step a65, and running regeneration and stop regeneration are canceled at steps a66 and a67, respectively. Ru.

Once the suppression flag is set in step a65, the process continues in step a63 until it is cleared.
So, take the NO route and proceed to steps a64 to a67.
is jumped.

After step a67 or a63, in step a68, the engine speed Ne and accelerator lever opening θ are read, and in step a69,
Find the intake throttle amount P and fuel increase amount ΔQ from the second table in the memory. Then, in step a70, the intake throttle amount is set to P, the fuel increase amount is set to ΔQ, and the process returns.

Here, the intake throttle amount characteristic when suppressing the rise in filter temperature is shown in FIG. 17, and the fuel increase characteristic is shown in FIG. 18. Incidentally, the fuel increase characteristic in FIG. 18 is shown as a characteristic with the fuel increase as a parameter.

In this way, by restricting the intake air and increasing the amount of fuel, the rise in temperature of the filter 3 is suppressed.

If running regeneration processing a15 or stop regeneration processing a1
If filter 3 can be regenerated with 6, B=0.
Before E=0 or E=0, steps a56 to a61 are performed through appropriate processes from step a32, steps a42, a44, and a46, but if regeneration of filter 3 fails or is not completed, becomes B=0 and E=0, and then the processing of steps a33 and a34 and steps a47 and
The process moves on to a48. Although such processing has been described above, the following processing is performed after these processing a34 and a48.

First, in step a71, the timer A is reset to A=A ₀ by the above-mentioned reset means, and
In step a72, the number of reproduction repetitions Rn is set to Rn+1.
Count up and at step a73, Rn≧
It is determined whether or not g.

This g means the allowable number of reproduction repetitions,
For example, a value of about 10 is set.

If NO at step a73, step a
In step 74, an indication that the reproduction is incomplete is displayed (displayed on the display 55), and the process returns.

If YES in step a73, reset Rn=0 in step a75, and then proceed to step a7.
After EGR is restored in step 6, the regeneration flag is cleared in step a77, the regeneration start display and regeneration incomplete display are canceled in step a77', the bypass passage 41 is opened in step a78, and the timer F is set to F= in step a79. _F0 is set and a counter is started. In step a79', an indication that reproduction is impossible (abnormality indication) is displayed on the display 55. In step a80, a prohibition flag is set, and the process returns. Note that F ₀ set by timer F is, for example, about 30 minutes.

When the prohibition flag is set in this way, the next timer interrupt signal causes step a to be set.
When the flow starts operating from 1, at step a4
Taking the NO route, in step a81, check whether the time set by timer F has elapsed (F=
0? ) is determined.

Then, in step a4, it is determined that playback is not possible until 30 minutes have passed after the start of timer F.
NO route, Step a81 takes the NO route, Step a84 determines whether the bypass passage 41 is closed, and if it is closed, Step a85
If the bypass passage 41 is closed, the process jumps to step a85 and returns. This allows EGR to be restored (step a7).
6), without causing deterioration of engine performance.
Exhaust gas bypasses the filter 3 through a bypass passage 41
is discharged through.

In this case, since the abnormality display (reproduction impossible display) process is performed after step a80, the abnormality display is displayed on the display 55, so that the passenger can know from this display that the filter cannot be regenerated.

If F=0, that is, about 30 minutes have elapsed after the start of timer F, in order to try filter regeneration again, the replay disabled display is canceled in step a81', the prohibition flag is cleared in step a82, and the step At step a83, the bypass passage 41 is closed, and the processing from step a5 onwards is performed.

Below, various cases will be explained.

(1) When the filter 3 is not clogged (filter regeneration is not required) In this case, various data are input in step a1 for each timer interrupt signal, and the filter temperature Tf is first determined. Normally, Tf<600, so take the NO route at step a3, then step a4 (YES) → a5 (YES) →
After a6, the water temperature Tw is determined. If Tw
If <50, it will be returned, but if Tw≧
If it is 50, the filter clogging state is determined in steps a8 and a9.

In this case, since the filter 3 is not clogged, the NO route is taken at step a9 and the process returns.

Thereafter, even if a timer interrupt signal is input, the same processing is repeated, and no filter regeneration processing is performed.

(2) When the filter 3 becomes clogged (filter regeneration is required) In this case, the regeneration operation means takes the YES route in step a9 and first releases EGR (step a10). This is done by opening valve 495 of pressure responsive device 49, closing valve 496, and closing EGR valve 48 by control signals from controller 6. This simplifies subsequent filter regeneration processing control.

Next, set timer A to set the time required for filter regeneration.
After _A0 is set (step a11), a regeneration flag is set, and a regeneration start display is displayed (steps a12, a12'), the engine operating state is determined.

If the vehicle is running, a running regeneration processing routine a15 is executed. This processing routine a1
5, after the first set time B ₀ is set and started in timer B (step a20), regeneration processing is performed according to the running condition (steps a23 and a24), but it is delayed. Corner device 3
Processing considering that the response delay in the operation of step 1 is larger than that of the fuel increaser 25 and the pressure response device 47 for driving the throttle valve 45 (steps a27 to a3).
1) allows appropriate filter regeneration even in transient conditions.

Furthermore, compensation during acceleration and deceleration is also taken into consideration (steps a25 and a31), so that the sense of acceleration and deceleration is not impaired.

Since the above processing is performed at extremely high speed, NO is taken at step a32.

After that, when the flow is restarted by the timer interrupt signal, if the filter 3 has started regeneration according to the settings of the fuel increase ΔQc and intake throttle amount Pcc, the filter temperature Tf will be 600℃ or higher. It should be, so in step a3
Take the YES route and go to steps a49 and a50.
The time that the temperature remains above 600°C is measured, and in step a51 it is checked whether the filter temperature Tf has risen too much.

If the filter temperature Tf is not too high,
Step a52 → (a53 → a54 → a55) →
Processing up to a56 is performed. This step a56
This is to check whether A ₀ (20 to 40) seconds (second set time) have elapsed after setting timer A. If it has not elapsed, take the NO route and repeat from steps a13 and a14. Running regeneration processing routine a15 is executed.

Repeat this several times until B≠0 (step a3).
2) (before the first set time elapses),
Steps a1-a3, a49-a52, a49-
After passing through a55, when A=0 (after the second set time has elapsed), select YES at step a56,
Step a57 (NO) → Process steps a58 to a61 and return.

As a result, the operation of the filter regeneration means is terminated, and the filter regeneration is completed.

The purpose of terminating the operation of the filter regeneration means in this way is to control the operation of the filter regeneration means to be terminated at least when the time measured by the timer means reaches the set time (when A=0 in step a56). means, specifically the first and second
Based on the measurement results of the timer means, the set temperature ( 600°C) has reached a second set time (for example, about 30 seconds) that is shorter than the first set time (B≠0 in step a32).
This is a control means for terminating the operation of the filter regeneration means (when A=0 in step a56).

As a result, if the filter temperature Tf exceeds 600° C. for 30 seconds out of 3 minutes, for example, it is assumed that the filter 3 has been regenerated and the operation of the filter regeneration means is stopped.

At this time, in step a58, by canceling (erasing) the playback incomplete display and the playback start display, a playback completion display is made. When the measurement time of the measurement timer means (measurement timer means) reaches a set time (for example, about 30 seconds), the regeneration completion display means indicates that the regeneration of the filter 3 is completed or the measurement results of the first and second timer means. This is done by a display means that displays whether the reproduction is completed or not based on the determination result of the determination means that determines whether or not the reproduction of the filter 3 is completed based on the determination result.

Note that this determining means determines that B≠ in step a32.
0, and when A=0 at step a56, it is determined that the regeneration of the filter 3 has been completed.

On the other hand, if it is determined in step a14 that the vehicle is idling or stopped, a stop regeneration processing routine a16 is executed. In this processing routine a16, after timers C, D, and E set and start C ₀ , D ₀ , and E ₀ (E ₀ ; first set time) (step a38), filter regeneration processing is performed. .
At this time, in the early stage (while C is not 0), the temperature of the front catalyst 5 rises in a short time due to the process in step a42, and in the middle stage (while C is 0 and D is 0).
In the latter stage (while D is 0 and E is not 0), the temperature Tf of the filter 3 is maintained at a high temperature necessary for reburning by the process of step a44, and in the latter stage (while D is 0 and E is not 0), the filter temperature Tf is increased. is suppressed.

Of course, during the processing at the earlier, middle, and latter stages, the process is returned after steps a42, a44, and a46, so that the filter temperature Tf increases with combustion to 600°C or higher (assuming that Tf does not exceed 900°C in this case). ), steps a49, a50,
a51 (NO), a52, a53-a55, a5
If the second set time A ₀ has not elapsed after performing the processing up to step 6, the stop regeneration processing routine a1 is executed again.
Execute 6.

Repeat this several times and move forward, middle,
_The processing at the latter stage is realized, and the set temperature ( 600°C) reaches the second set time A ₀ (<first set time), by the above control means,
The operation of the filter regeneration means is then terminated.

In this case as well, if the filter temperature Tf exceeds 600°C for 30 seconds out of 3 minutes, for example, it is assumed that the filter 3 has been regenerated and the operation of the filter regeneration means is stopped.

In this case as well, when the indications of reproduction incomplete and reproduction start disappear, a reproduction completion indication is made (step a58).

On the other hand, if the filter temperature Tf reaches 900°C or higher during running regeneration processing or stop regeneration processing, take the YES route in step a51 and close the bypass passage 41 (step a).
86, a87), the temperature rise suppression routine a62 is executed. In this processing routine a62, an increase in the filter temperature Tf is suppressed by setting the intake throttle amount P and the fuel increase amount ΔQ according to the operating state (steps a69 and a70).

Note that during the stop regeneration process, the rise in filter temperature is suppressed in advance in step a46, so normally
It is almost inconceivable that Tf would exceed 900°C, and it can be said that the value of use is high during the running regeneration process.

Also, after step a51, the bypass passage 41
The reason why it is determined whether the bypass passage 41 is open or closed is because there is a possibility that the bypass passage 41 may be open before starting this process because it cannot be regenerated.

By the way, as a result of running regeneration processing and stop regeneration processing, if A does not become 0 before B = 0 and E = 0 (see steps a32 and a45), then (see step a56), By the above-mentioned reset means, the timer A is reset in step a71 through steps a33 and a34; steps a47 and a48, and the number of playback repetitions Rn is added (step a72). The process is returned with an incomplete display. That is, in this case, since the reproduction is not completed, a message to that effect is displayed. Such display is performed by the above-mentioned display means.

Then, when the number of reproduction repetitions Rn becomes g or more,
There is a strong possibility that filter playback is not possible.
The following processing is performed. That is, after restoring EGR (step a76), opening the bypass passage 41 (step a78), and starting timer F (step a79), the non-renewable display (abnormal display) is displayed by the non-renewable display means. (step a79'). At this time, the reproduction incomplete and reproduction start indications are canceled (step a7).
7′).

After that, set the prohibition flag (step a).
80).

Then, once the prohibition flag is set, after the next timer interrupt signal is input, step a4 is executed.
(NO), F=0? (Step a81)
is judged. This time F is set to about 30 minutes, for example, but until this time has elapsed, the NO route is taken in step a81 and the bypass passage 41 is
After closing (steps a84 and a85), filter regeneration processing is prohibited. At this time, the opening/closing of the bypass passage 41 is determined in steps a86 and a87 before starting this process.
This is because there is a possibility that it may be open.

In this way, when the reset means is operated continuously, the operation of the filter regeneration means is prohibited in priority to the regeneration activation means, and such prohibition is effected by the prohibition means. During this time, a display indicating that playback is not possible is performed (step a79').

This prevents deterioration of engine performance and allows for smooth exhaust gas discharge.

Furthermore, when F=0, that is, after about 30 minutes have elapsed, in order to improve the self-regeneration function, the display indicating that no replay is possible is canceled (step a81'), and the filter regeneration process is attempted again.

That is, after the processing at steps a82 and a83, the processing from step a5 is performed again.

If the filter regeneration is successful, take the YES route in step a56, and proceed to steps a57~
Since the process reaches a61, the display indicating that playback is not possible disappears, and a display indicating that playback is complete is displayed instead. Specifically, the display 55 is completely turned off.

Even if you do this, if YES is returned at steps a32 and a45 many times in a row, and the processing from step a71 onward is performed, and the number of playback repetitions Rn exceeds g, the display indicating that playback is not possible will be displayed again ( At step a79'), a prohibition flag is set (step a80), and filter regeneration is prohibited until F=0 (until approximately 30 minutes have elapsed).

If you repeat this many times after that, the unplayable message will hardly disappear, so if this happens, remove filter 3 and try playing again.
Replace filter 3.

In the first embodiment described above, the second timer means detects that the detected temperature Tf reaches the set temperature (for example, 600°C) during the elapsed time during which the filter regeneration means is in operation.
℃), but the same effect can be obtained by measuring the time during which the detected temperature Tf is lower than the set temperature within the above elapsed time.

19 to 33 show a particulate collection filter regeneration device for a diesel engine as a second embodiment of the present invention, FIG. 19 is a schematic configuration diagram thereof, and FIG. 20 is a main part of its injection amount adjusting means Figures 21 to 23 are flowcharts to explain the operation, Figure 24 is a characteristic diagram of the amount of fuel supplied during non-regeneration (hereinafter referred to as fuel amount), and Figure 25 is a diagram showing its characteristics. Fig. 26 is a fuel quantity characteristic diagram during regeneration, Fig. 26 is a fuel quantity characteristic diagram when suppressing the filter temperature rise, Fig. 27 is a target retard quantity characteristic diagram during regeneration, and Fig. 28 is the target when suppressing the filter temperature rise. Retard amount characteristic diagram, Figure 29 is the intake negative pressure (intake throttle amount) characteristic diagram during regeneration, Figure 30 is the intake negative pressure (intake throttle amount) characteristic diagram when filter temperature rise is suppressed, and Figures 31 to 33 Each figure is a correction coefficient characteristic diagram, and in each figure, the same reference numerals as in FIGS. 1 to 18 indicate substantially the same parts.

In this second embodiment, as shown in FIGS. 19 and 20, the injection amount adjusting means 10' of the injection pump 8 is constructed as follows. First, the spill ring 5 that is slidably fitted onto the plunger 14 is moved to the lever 58.
The injection amount is adjusted and controlled by being driven by the pressure response device 57 via the pressure response device 57.

That is, in this second embodiment, the main adjustment is performed in conjunction with the accelerator, as in the first embodiment, and instead of the fuel increase device 25 increasing the amount of fuel at the time of filter regeneration, the fuel Including the increased amount, one device 57 is used.

The pressure responsive device 57 has a diaphragm 571 connected to a rod that drives its spill ring 15.
An atmospheric passage 573 for introducing atmospheric pressure Vat and a vacuum passage 574 for introducing vacuum Vvac from a vacuum pump etc. are connected to a pressure chamber 572 partitioned by a pressure chamber 572.
4 are respectively provided with electromagnetic on-off valves 575 and 576.

And the solenoid of each on-off valve 575, 576
A control signal is supplied to Qvent and Qvac from the controller 6'.

The actual injection amount is detected by a feedback signal from a potentiometer 58' that detects the movement of the rod of the pressure responsive device 57 to the controller 6'.

The rest of the configuration is almost the same as that of the first embodiment described above, except for the processing performed by the controller 6' (see FIG. 19).

Next, the controller 6' in this second embodiment
The processing carried out will be explained using the flowcharts of FIGS. 21 to 23. This controller 6' is
The main routine shown in FIG. 21, the regeneration state determination routine shown in FIG. 22, the fuel amount shown in FIG. 23,
It has a retard amount and intake throttle amount setting routine, and each routine is triggered by a predetermined timer interrupt signal.

The main routine shown in FIG. 21 will be explained.

This main routine mainly controls filter regeneration and suppression of filter temperature rise. First, in step b1, each sensor 7A, 7B,
12, 13, 39, 40, 51, 52, 53, 5
4, 58', input these to each address of RAM in the controller 6', and then in step b2, Tf≧T ₂ (=900℃)
Decide whether or not.

If the filter temperature Tf is not 900°C (T ₂ ) or higher, the filter temperature rise suppression flag _K1 is set to 0 (clear) in step b3, and if it is 900°C or higher, the filter temperature rise is suppressed in step b4. Set flag _K1 to 1 (set).

After that, in step b5, the water temperature Tw is set to 50℃.
(T ₃ ) or more, and if so, in step b6, the regeneration operating means determines whether the particulate accumulation information Np is greater than or equal to a predetermined value k, and if Np≧k , in step b7, set the playback flag _K2 to 1 (set),
Return.

Note that when Tw<T ₃ and Np<k, the process returns without setting the reproduction flag K ₂ to 1.

Next, the reproduction state determination routine shown in FIG. 22 will be explained.

First, in step c1, it is determined whether the regeneration flag K ₂ =1 (set), and if K ₂ =0 (clear; filter regeneration not required), the process returns without doing anything. However, when K ₂ =1, in step c2,
It is determined whether the prohibition flag L ₂ = 0 (clear), and if it is in the clear state, a playback start display is displayed in step c3, and then, in step c4, it is determined whether the filter temperature Tf≧T ₁ (=600°C). be done. If Tf≧600, the detected temperature is within the set temperature (600
M
Count up to +1 and M≧m at step c6
(m: a predetermined value that determines the set time, for example, is set to about 30 seconds).

During M<m, the NO route is taken to return. However, when M≧m, step c6
Taking the YES route, the playback incomplete display and playback start display are canceled (disappeared), and a playback completion display is displayed (step c7). This display is made by a display means (or a reproduction completion display means that displays only the completion of reproduction) that displays whether reproduction is complete or incomplete based on the determination result of the determination means that determines the completion of filter reproduction.

After that, in step c8, the flags L, M, N
= 0 (clear), and in step c9, the reproduction flag K ₂ is set to = 0 (clear) and the process returns.

In this way, the operation of the filter regeneration means is terminated, but this is because the regeneration time measurement timer means, which will be described later, reaches a certain set time as measured by the non-regeneration time measurement timer means (see step c11, n). This is done by the control means which terminates the operation of the filter regeneration means when the measurement result of the timer means reaches another set time (see m in step c6).

On the other hand, in step c4, if Tf<600, the non-regeneration time measurement timer means measures the time during which the detected temperature is lower than the set temperature (600°C) out of the elapsed time during which the filter regeneration means is in operation. Then,
In step c10, the count is increased to N=N+1, and in step c11, N≧n (n: a predetermined value that determines the set time, set to about 2 to 3 minutes, for example).
It is determined whether

When N<n, the NO route is taken to return. However, when N≧n, step c12
Then, flags N and M are set to 0 (clear), and in step c13, L=L+1 is counted up, and in step c14, this L is greater than or equal to g (this g is set to about 10 as described above). Decide whether or not.

That is, it is determined whether the number of reproduction repetitions is equal to or greater than g times.

Then, if L<g, NO in step c14.
The route is determined, a reproduction incomplete display is displayed in step c15, and the process returns.

Thereafter, when L≧g, the regeneration flag _K2 is set to 0 (cleared) by the reset means (step c16), and the prohibition flag _L2 is set to 1 in step c17.
(set), and in step c18, timer F is set to F=F ₀ (approximately 30 minutes) and a counter is started, and in step c19, the playback start display and playback incomplete display are canceled and the playback impossible display is displayed. (abnormal display) is displayed.

Such an abnormality display is performed by a non-reproducible display means.

When prohibition flag _L2 is set in this way,
Is L ₂ = 0 at the next timer interrupt signal? When making a decision, take the NO route in step c2, and
At step 20, it is determined whether the time set by timer F has elapsed (F=0?), and if it does not appear to have elapsed, the NO route is taken and the process returns.

In other words, filter regeneration is prohibited until, for example, about 30 minutes have passed after the timer F starts, in order to prevent engine performance from deteriorating. Such prohibition shall be effected by means of prohibition.

When F=0, that is, 30 minutes have passed after the start of timer F, step c is entered to try filter regeneration again in order to improve the self-regeneration function.
In step 21, the prohibition flag _L2 is set to 0 (cleared), in step c22, the abnormality display is canceled, and the processing from step c4 onwards is performed.

Next, the fuel amount, return amount, and intake throttle amount setting routine shown in FIG. 23 will be explained.

First, in step d1, it is determined whether the filter temperature rise suppression flag K ₁ =1 (set).
If so, it is determined in step d2 whether the prohibition flag L ₂ =1 (set), and if NO, it is determined in step d3 whether the reproduction flag K ₂ =1 (set).

Then, if the playback flag _K2 is cleared or the prohibition flag _L2 is set,
The fuel amount, retard amount, and intake throttle amount are set as those for normal operation without filter regeneration (step d4).

That is, in the fuel amount setting process indicated by d5, the engine rotation speed Ne is determined from the first map in the memory.
The fuel amount Qs is set according to the accelerator lever opening degree θ, and in the retard amount setting process indicated by d6,
The retard amount R=R ₀ (0) (in this case, the retard amount zero is for the retard device 31), and in the intake throttle amount setting process indicated by d7, the intake throttle valve is fully open (Ps=P ₀ ). It is set so that

Note that the fuel amount characteristics in the first map are as shown in FIG.

If the regeneration flag K ₂ =1, the fuel amount, retard amount, and intake throttle amount suitable for filter regeneration are set (step d8).

That is, in the fuel amount setting process indicated by d9, the engine rotation speed Ne is determined from the second map in the memory.
The fuel amount Qs is set according to the accelerator lever opening degree θ, and in the retard amount setting process indicated by d10, the above Ne, θ is calculated from the third map in the memory.
The retard amount Rs is set according to the above-mentioned Ne and θ, and in the intake throttle amount setting process indicated by d11, the intake throttle amount Ps is set according to the above-mentioned Ne and θ from the fourth map in the memory.

The fuel amount characteristics in the second map are set as shown in FIG. 25, the retard amount characteristics in the third map are set as shown in FIG. 27, and the intake throttle amount characteristics in the fourth map are set as shown in FIG. The settings are made as shown in FIG.

Furthermore, filter temperature rise suppression flag K ₁ =1
(Set), the fuel amount, retard amount, and intake throttle amount suitable for suppressing the rise in filter temperature are set (step d12).

That is, in the fuel amount setting process indicated by d13,
Engine rotation speed from the 5th map in memory
Fuel amount Qs according to Ne and accelerator lever opening θ
is set, and in the retard amount setting process indicated by d14, the above Ne, θ is calculated from the sixth map in the memory.
The retard amount Rs is set according to the above-mentioned Ne and θ, and in the intake throttle amount setting process indicated by d15, the intake throttle amount Ps is set according to the above-mentioned Ne and θ from the seventh map in the memory.

The fuel amount characteristics in the fifth map are set to increase on the low engine speed side as shown in FIG. 26, and the retard amount characteristics in the sixth map are set to increase as shown in FIG.
The intake throttle amount characteristics in the seventh map are set as shown in FIG. 30.

After setting values suitable for each process in this way, first, in step d16, a value Δα' is calculated by subtracting the actual retard amount Rr from the target retard amount Rs, and in step d17, this value Δα ′ and the accelerator lever opening θ, response delay correction coefficients K _P and K _Q are set.

The characteristics of the response delay correction coefficient K _P for correcting the amount of intake throttling are similar to those shown in Fig. 15 above.
The characteristics of the response delay correction coefficient _KQ for fuel quantity correction are set as shown in FIG. 32.

Thereafter, in step d18, acceleration/deceleration correction coefficients S _P and S _Q are set according to the amount of change (acceleration/deceleration amount) dθ/dt in the accelerator lever opening θ. The characteristics of the deceleration correction coefficient S _P are set as shown in FIG. 33, which is almost the same as the above-mentioned FIG. 13.

Then, in step d19, the fuel amount Qs=K _Q S _Q
The calculation Qs is performed, and in step d20, the calculation is performed such that the intake throttle amount Ps=K _P S _P Ps.

Here, the reason why Qs and Ps are multiplied by K _Q and K _P is as follows.

That is, the response delay in the operation of the retardation device 31 is larger than that in the operation of the pressure response device 47 for driving the injection amount adjustment pressure response device 57 and the intake throttle valve 45.

If a target value signal is given simultaneously to the devices 47, 57 with a small response delay and the device 31 with a large response delay, the devices 47, 57 will reach the target value immediately, but the device 31 will reach the target value much later. Therefore, proper filter regeneration cannot be performed in this transient state.

Therefore, measure the actual retard amount Rr of the device 31 with a large response delay, find correction coefficients K _P and K _Q based on the difference Δα' from the target value R _S , and multiply Qs by K _Q and Ps by K _P. Therefore, it was decided to operate the devices 47 and 57 in keeping with the response delay of the device 31. By controlling in this manner, proper filter regeneration can be performed in the above-mentioned transient state (actually, the transient state occupies a considerable portion).

Furthermore, the reason why the acceleration/deceleration correction coefficients S _P and S _Q are also multiplied when calculating Ps and Qs is as follows.

First, a coefficient that compensates for response delay during acceleration and deceleration.
This is to reduce the influence of K _P and give a sense of acceleration and deceleration. In other words, as mentioned above, due to the action of K _P , the amount of intake throttling changes in accordance with the response delay of the retardation device 31, so even during acceleration and deceleration, the amount of intake throttling only changes slowly. As a result, there is no sense of acceleration or deceleration.

Therefore, during acceleration and deceleration, a correction coefficient _SP having characteristics as shown in FIG. 33 was set so that the intake throttling amount changes rapidly.

Second, the purpose is to improve acceleration/deceleration performance by going further than compensating for the response delay described above. That is, the characteristics of the correction coefficient S _P are set to change more than the value necessary to compensate for response delay during acceleration and deceleration.

Note that the fuel amount Qs is affected by other factors (e.g. exhaust gas) during acceleration and deceleration, so it cannot be exactly the same as the intake throttling amount, but the general reason for applying the correction coefficient S _Q is This is to reduce the influence of the coefficient K _Q that compensates for response delay during acceleration and deceleration, and to create a sense of acceleration and deceleration.

After that, in step d21, the target intake throttle amount is
A value ΔP is calculated by subtracting the actual intake throttle amount Pr from Ps, and at step d22, the target fuel amount
A value ΔQ is calculated by subtracting the actual fuel amount Qr from Qs.

Then, in step d23, the high pressure side solenoid or return side solenoid of the electromagnetic spool valve 35 is driven with a control amount according to Δα, and in step d24, with a control amount according to ΔP,
Opening/closing valves 467, 475 for pressure responsive device 47
Solenoids Pvac and Pvent are driven, and in step d25, solenoids Qvac and Qvent of on-off valves 576 and 575 for pressure response device 57 are driven with a control amount according to ΔQ.

Below, various cases will be explained.

(1) When filter 3 is not clogged (when filter regeneration is not necessary) In this case, in the main flow of Fig. 21, the NO route is taken and returned at steps b5 and b6, so Playback flag _K2 is 0
It is becoming. Therefore, in the flow shown in FIG. 22, the NO route is taken at step c1 and the process returns, and therefore, in FIG. 23, various values for filter reproduction at d8 are not set.

In this case, normally step d1 (NO) → d
2(NO)→d3(NO), and the fuel amount, retard amount (zero retard amount of device 31), and intake throttle amount (fully open) for normal operation are set (steps d4 to d7).

Then, operation is performed according to these set values. In this case, only ΔQ is in the operating state.
It changes depending on Ne and θ.

As a result, filter regeneration processing is not performed.

(2) When filter 3 becomes clogged (if filter regeneration is required) First, consider the case where filter temperature Tf is lower than 900°C. In this case, in the main flow of FIG. 21, take the NO route in step b2, clear the filter temperature rise suppression flag _K1 (step b3), and then proceed to steps b5 and b.
6, the playback flag _K2 is set to 1 (step b7). Therefore, in the flow shown in FIG. 22, the YES route is taken in step c1.

In this case, in the flow shown in FIG.
Step d1 (NO) → d2 (NO) → d3
(YES), the fuel amount, retard amount, and intake throttle amount for operation during filter regeneration are set (steps d8 to d11), and the injection amount adjusting means 10' and the retardation device 31 are adjusted according to these set values. And the intake throttle amount 45 is controlled.

At this time, since the response delay is compensated for (steps d17, d19, d20), filter regeneration is appropriately compensated even in the transient state. Also, since compensation is made during acceleration and deceleration (steps d18 to d20), the feeling of acceleration and deceleration is not impaired.

By doing this, the particulate hydrate usually starts to burn and the filter temperature Tf increases.

As a result, in the flow of FIG. 22, the YES route is taken in step c4, and the timer means for measuring playback time calculates the time during which the filter temperature is 600°C or higher (steps c5, c6).
When the time of 600°C or higher exceeds the set time (for example, 30 seconds), the YES route is taken in step c6, and the regeneration completion display is displayed by erasing the regeneration start display (step c7), and then flags L, M,
Assuming N=0 and K ₂ =0 (steps c8 and c9),
Will be returned.

As a result, the operation of the filter regeneration means is terminated, and the filter regeneration is completed.

Note that if the filter temperature Tf is not 600°C or higher, the NO route is taken in step c4, and the filter temperature Tf is set by the timer means for measuring the non-regeneration time.
The time when the temperature does not exceed 600℃ is measured (step c1).
0, c11), if the time when the temperature is not above 600℃ passes another set time (for example, 2 to 4 minutes), the YES route is taken in step c11, and the flags N, M=
0 (step c12), and measures the number of times the playback is repeated (step c13). If the number of times the playback is repeated is not a predetermined number g (for example, 10) or more, a message indicating that the playback is not completed is displayed (step c1).
5).

However, when L≧g, K ₂ =0, L ₂ = (steps c16, c17), timer F (for example
After starting the 30 minute timer) (step c)
18) Displays an indication that playback is impossible (abnormality indication) (step c19).

After the prohibition flag L ₂ becomes 1 in this way,
Step c1 is activated by the next timer interrupt signal.
Take (YES) → c2 (NO). and timer F
Until the time set in step c20 (30 minutes) has elapsed, filter regeneration is prohibited by taking the NO route in step c20.

After 30 minutes, step c20
After taking the YES route, clearing the prohibition flag _L2 in step c21 and canceling the abnormal display in step c22, try filter reproduction again.

If the filter temperature Tf is
increases, and if M≧m becomes faster than N≧n, this means that the filter regeneration means has been activated, and a regeneration completion display is displayed (step c7), and the filter regeneration means is activated. operation is terminated.

However, if the filter temperature Tf does not rise even after the subsequent processing, the above-mentioned prohibition processing and retry processing will be repeated. In this case, it is necessary to replace the filter 3 at an early stage.

Next, consider the case when the filter temperature Tf is 900°C or higher. In this case, in the main flow of FIG. 21, the YES route is taken in step b2 to set the filter temperature rise suppression flag _K1 (step b4), and then the YES route is taken in steps b5 and b6 to return. Since there is, play flag
_K2 is 1 (step b7), so in the flow shown in Figure 22, at step c1
Take the YES route.

In this case, in the flow shown in FIG.
In step b1, the YES route is taken, and the fuel amount, retard amount, and intake throttle amount for operation during temperature rise suppression are set (steps d12 to d15), and the injection amount adjustment means 10' and the retardation amount are adjusted according to these set values. The corner device 31 and the intake throttle valve 45 are controlled.

In this case as well, since the response delay is compensated for (steps d17, d19, d20),
Filter regeneration is properly compensated even in transient conditions. Also, since compensation is made during acceleration and deceleration (steps d18 to d20), the feeling of acceleration and deceleration is not impaired.

By doing so, an increase in filter temperature is effectively suppressed.

Note that in this case as well, the filter is being regenerated, so in the flow shown in FIG.
The YES route is taken in step c4, and the playback time is measured (steps c5 and c6).

In this second embodiment, we mainly considered filter regeneration while the vehicle is running, but it is of course possible to apply this second embodiment to filter regeneration while the vehicle is idling or stopped.

Furthermore, the display by the display 55 may be visually appealing, such as a lamp or a light emitting diode, or may be audible, using audio or the like.

Note that the specific values of temperature and time used in each of the above-mentioned Examples are merely examples.

As described in detail above, the particulate collection filter regeneration device for a diesel engine according to the present invention provides the following effects and advantages.

(1) Reburning of particulate can be performed automatically regardless of engine driving conditions and without deteriorating driveability.

(2) The time during which the filter temperature is higher than a certain temperature is measured, and when this time reaches a certain time, it is assumed that filter regeneration has been completed and the operation of the filter regeneration means is terminated. This is a relatively simple logic. Moreover, accurate filter regeneration control can be realized.

(3) Furthermore, before the elapsed time during the operation of the filter regeneration means measured by the first timer means reaches the first set time, the elapsed time measured by the second timer means is When the time during which the temperature remains higher than the set temperature (regeneration time) reaches the second set time, which is shorter than the first set time, filter regeneration is considered to have been completed and the operation of the filter regeneration means is terminated. Increased certainty.

(4) If it is detected that the elapsed time has reached the first set time before the playback time reaches the second set time, the first and second timer means are reset. Furthermore, when this reset state continues, the operation of the filter regeneration means is prohibited in priority to the regeneration operation means.
This eliminates the need for deterioration in engine performance, and in this case, the filter can be bypassed to exhaust the exhaust gas, making it possible to achieve smooth exhaust gas even if the filter is clogged.

(5) A playback time measuring timer means for measuring the time during which the detected temperature is higher than the set temperature during the elapsed time, and a timer means for measuring the time during which the detected temperature is lower than the set temperature during the above elapsed time. A timer means for measuring playback time is provided, and when the measurement result of the timer means for measuring playback time reaches another set time before the measurement result of the timer means for measuring non-playback time reaches a certain set time. Furthermore, since the operation of the filter regeneration means is terminated when the filter regeneration is completed, filter regeneration control can be performed accurately using relatively simple logic.

(6) When the measurement result of the non-reproduction time measurement timer reaches the above-mentioned set time before the measurement result of the playback time measurement timer means reaches the above-mentioned other setting time, each of the above When the timer means is reset and the reset state continues, the operation of the filter regeneration means is prohibited in preference to the regeneration operation means, so that in this case as well, there is no need for deterioration in engine performance, and furthermore, the filter regeneration means is prohibited. It is also possible to bypass and exhaust the exhaust gas,
Smooth exhaust is possible.

(7) Since at least one of the completion and incomplete regeneration of the particulate collection filter is displayed based on the determination result of the determination means, the status of the regeneration of the filter can be accurately grasped.

(8) Since it is possible to determine whether filter regeneration is complete or incomplete and to display a filter regeneration completion or incomplete display based on the result of this determination, it is possible to grasp the filter regeneration status in more detail.

(9) While filter regeneration is prohibited, an indication that it is not possible to regenerate is displayed, so that accurate processing is possible when determining whether to replace the filter.

(10) Even if filter regeneration is once prohibited, filter regeneration can be performed again after a predetermined period of time has elapsed, so the self-regeneration function is improved.

(11) Appropriate filter regeneration processing can be performed depending on the operating state of the engine.

[Brief explanation of drawings]

Figure 1 is a diagram showing the relationship between engine speed and average effective pressure divided into operating ranges in which filter regeneration is possible using conventional equipment, and Figure 2 is a diagram showing the temperature increase effect and output reduction due to retardation of the injection pump. , 3rd
18 to 18 show a particulate collection filter regeneration device for a diesel engine as a first embodiment of the present invention, FIG. 3 is a schematic configuration diagram thereof, and FIG. 4 is a side sectional view of a main part of the injection amount adjusting means. 5 is a schematic configuration diagram of the retardation device, FIG. 6 is a total injection amount isocurve per stroke of the engine equipped with this device, and FIG. 7 is a retardation amount isocurve of the engine equipped with this device. Figure 8 is an isometric diagram of the increased injection amount per stroke based on the accelerator lever opening of the engine equipped with this device, and Figure 9 is an isometric diagram of the retardation amount based on the accelerator lever opening of the engine equipped with this device. FIG. 10 is an explanatory diagram of the injection amount at a constant engine speed, FIG. 11 is an exhaust temperature isocurve diagram of the engine with the regenerator shown in FIG. 6, and FIGS. 13th
Figures 15 to 15 are diagrams for explaining the correction coefficient characteristics, Figure 16 is the intake throttle amount characteristic diagram,
17 and 18 are intake throttling amount characteristic diagrams and fuel increase characteristic diagrams for suppressing the rise in filter temperature, respectively, and FIGS. 19 to 33 are diagrams showing particulate collection filters in a diesel engine as a second embodiment of the present invention. This indicates the playback device, and the first
FIG. 9 is a schematic diagram of the configuration, FIG. 20 is a schematic diagram showing the main parts of the injection amount adjusting means, FIGS. 21 to 23 are flowcharts for explaining its operation, and FIG.
The figure is a characteristic diagram of the fuel supply amount (hereinafter referred to as fuel amount) during non-regeneration, FIG. 25 is a characteristic diagram of fuel amount during regeneration, and FIG. 26 is a characteristic diagram of fuel amount when suppressing the rise in filter temperature. FIG. 27 is a characteristic diagram of the target retard amount during regeneration, FIG. 28 is a characteristic diagram of the target retard amount when suppressing the rise in filter temperature, and FIG. 29 is a characteristic diagram of the intake negative pressure (intake throttling amount) during regeneration. 30th
The figure is a characteristic diagram of the intake negative pressure (intake throttle amount) when suppressing the rise in filter temperature, and each of FIGS. 31 to 33 is a characteristic diagram of the correction coefficient. 1... Diesel engine, 2... Exhaust passage,
3... Particulate collection filter, 4... Exhaust manifold, 5... Oxidation catalyst, 6, 6'... Controller, 7A, 7B... Pressure sensor, 8...
Injection pump, 9... Hydraulic automatic timer, 10, 10'... Injection amount adjusting means constituting filter regeneration means, 11... Accelerator, 12...
Accelerator opening sensor, 13...Rotation speed sensor,
14... Plunger, 15... Spilling, 1
6...Driveshaft, 17...Governor, 18
... Weight sleeve, 19 ... Control lever, 20 ... Supporting lever, 21 ...
Tension lever, 22... Fulcrum pin, 23...
Guide lever, 24...pin, 25...fuel increase device constituting filter regeneration means, 26...compression spring, 27...increase screw, 28...reduction gear, 29...motor, 30...position sensor, 31
... Injection timing retard device, 32 ... Planetary gear train, 3
3... Hydraulic cylinder, 34... Piston, 35...
...Solenoid spool valve, 36...Oil pump, 37...
Oil filter, 38... Relief valve, 39...
Position sensor, 40...Temperature sensor as temperature detection means, 41...Bypass passage, 42...Opening/closing valve, 43...Intake manifold, 44...Intake passage, 45...Intake throttle valve constituting filter regeneration means , 46... EGR passage, 47... Pressure response device, 48... EGR valve, 49... Pressure response device,
50... Pressure sensor, 51, 52... Potentiometer, 53... Water temperature sensor, 54... Vehicle speed sensor, 55... Display, 57... Pressure response device, 5
8... Lever, 58'... Potentiometer, 2
01... Spherical part, 321, 322... Ring gear, 331, 332... Hydraulic cylinder chamber, 471
...Diaphragm, 472...Pressure chamber, 473...
...Atmosphere passage, 474...Bakiyum passage, 47
5,476...Opening/closing valve, 491...Diaphragm, 492...Pressure chamber, 493...Atmospheric passage, 4
94... Vacuum passage, 495, 496... Open/close valve, 571... Diaphragm, 572... Pressure chamber, 572... Atmospheric passage, 574... Vacuum passage, 575, 576... Open/close valve.

Claims (1)

[Scope of Claims] 1. A particulate collection filter disposed in the exhaust passage of a diesel engine to collect particulate matter discharged from the combustion chamber of the diesel engine, and when particulate matter is collected in the particulate matter collection filter. and a filter regeneration means that operates to burn the particulate regenerate to regenerate the particulate collection filter, the first timer means for measuring the elapsed time while the filter regeneration means is in operation; Temperature detection means detects the temperature of the particulate matter collection filter or the exhaust passage adjacent to the particulate matter collection filter, and the detected temperature is lower than the set temperature within the above elapsed time based on the detection result of the temperature detection means. a second timer means for measuring at least one of a certain time or another time during which the detected temperature is higher than the set temperature; a measurement result of the first timer means; and Based on the measurement result of the second timer means, it is detected that the other time becomes a second set time shorter than the first set time before the elapsed time reaches the first set time. 1. A particulate collection filter regeneration device for a diesel engine, comprising: control means for terminating the operation of the filter regeneration means when the filter regeneration means is activated. 2. A particulate collection filter disposed in the exhaust passage of the diesel engine to collect particulate matter discharged from the combustion chamber of the diesel engine, and a particulate matter collection filter that burns the particulate matter when collected in the particulate matter collection filter. and filter regeneration means that operates to regenerate the particulate collection filter, wherein the regeneration operation means detects that particulate is collected in the particulate collection filter and activates the filter regeneration means. a first timer means for measuring the elapsed time during the operation of the filter regeneration means; a temperature detection means for detecting the temperature of the particulate collection filter or the exhaust passage adjacent to the particulate collection filter; At least the time during which the detected temperature is lower than the set temperature within the elapsed time based on the detection result of the detection means, or the other time during which the detected temperature is higher than the set temperature during the elapsed time. a second timer means for measuring one of the times; and a second timer means for measuring one of the times, and a second timer means for measuring one time, and a timer means for measuring the other time before the elapsed time reaches the first set time based on the measurement result of the first timer means and the measurement result of the second timer means. control means for terminating the operation of the filter regeneration means when it is detected that the time has reached a second set time shorter than the first set time; a measurement result of the first timer means; When it is detected that the elapsed time reaches the first set time before the other time reaches the second set time based on the measurement result of the second timer means, the first timer means a reset means for resetting the measurement result of the timer means and the measurement result of the second timer means; and a reset means that operates in priority over the regeneration operation means to activate the filter regeneration means when the reset means is operated in succession. What is claimed is: 1. A particulate collection filter regeneration device for a diesel engine, characterized by comprising prohibition means for prohibiting particulate matter. 3. A particulate collection filter disposed in the exhaust passage of the diesel engine to collect particulate matter discharged from the combustion chamber of the diesel engine, and a particulate matter collection filter that burns the particulate matter when collected in the particulate matter collection filter. filter regeneration means that operates to regenerate the particulate collection filter, the temperature detection means for detecting the temperature of the particulate collection filter or the exhaust passage adjacent to the particulate collection filter; Regeneration time measuring timer means for measuring the time during which the detected temperature is higher than the set temperature out of the elapsed time during the operation of the filter regeneration means based on the detection result of the temperature detection means; and the detection result of the temperature detection means. non-regeneration time measurement timer means for measuring the time during which the detected temperature is lower than the set temperature out of the elapsed time during the operation of the filter regeneration means based on; It is characterized by comprising a control means for terminating the operation of the filter regeneration means when the measurement result of the regeneration time measuring timer means reaches another set time before the result reaches a certain set time, A particulate collection filter regeneration device in a diesel engine. 4. A particulate collection filter disposed in the exhaust passage of the diesel engine to collect particulate matter discharged from the combustion chamber of the diesel engine, and a particulate matter collection filter that burns the particulate matter when collected in the particulate matter collection filter. and filter regeneration means that operates to regenerate the particulate collection filter, wherein the regeneration operation means detects that particulate is collected in the particulate collection filter and activates the filter regeneration means. and a temperature detection means for detecting the temperature of the particulate collection filter or the exhaust passage adjacent to the particulate collection filter; a regeneration time measuring timer means for measuring the time during which the detected temperature is higher than the set temperature; and a regeneration time measuring timer means for measuring the time during which the detected temperature is higher than the set temperature; and a timer means for measuring the time when the detected temperature is higher than the set temperature; A timer means for measuring non-reproducing time that measures the time during which the temperature remains lower than the temperature, and a timer means for measuring non-reproducing time that measures the timer means for measuring non-reproducing time before a certain set time is reached. control means for terminating the operation of the filter regeneration means when a set time has been reached, and a control means for causing the operation of the non-regeneration time measurement timer means to terminate the operation of the non-regeneration time measurement means before the measurement result of the regeneration time measurement timer means reaches the other set time. a reset means for resetting the measurement result of the playback time measurement timer means and the non-playback time measurement timer means when the measurement result reaches the certain set time; and the reset means continuously 1. A particulate collection filter regeneration device for a diesel engine, comprising: inhibiting means that operates with priority over the regeneration activation means to prohibit the operation of the filter regeneration means when activated. 5. A particulate collection filter disposed in the exhaust passage of the diesel engine to collect particulate matter discharged from the combustion chamber of the diesel engine, and a particulate matter collection filter that burns the particulate matter when collected in the particulate matter collection filter. filter regeneration means that operates to regenerate the particulate collection filter when the particulate collection filter is in operation; Temperature detection means for detecting the temperature of the exhaust passage near the particulate collection filter, and the time during which the detected temperature is lower than the set temperature within the elapsed time or the elapsed time based on the detection result of the temperature detection means. a second timer means for measuring at least one of the other times during which the detected temperature is higher than the set temperature; and a measurement result of the first timer means and the second timer means. determination means for determining whether or not regeneration of the particulate collection filter is completed based on the measurement results of; and a display that displays at least one of completion or incompleteness of the regeneration based on the determination result of the determination means. means, wherein the determining means determines whether the other time has elapsed before the elapsed time reaches the first set time based on the measurement result of the first timer means and the measurement result of the second timer means. A particulate waste in a diesel engine, characterized in that it is configured to determine that regeneration of the particulate waste collection filter is completed when it is detected that a second set time shorter than the first set time has arrived. Collection filter regeneration device. 6. A particulate collection filter disposed in the exhaust passage of a diesel engine to collect particulate matter discharged from the combustion chamber of the diesel engine, and a particulate matter collection filter that burns the particulate matter when collected in the particulate matter collection filter. filter regeneration means that operates to regenerate the particulate collection filter when the particulate collection filter is in operation; Temperature detection means for detecting the temperature of the exhaust passage near the particulate collection filter, and the time during which the detected temperature is lower than the set temperature within the elapsed time or the elapsed time based on the detection result of the temperature detection means. a second timer means for measuring at least one of the other times during which the detected temperature is higher than the set temperature; and a measurement result of the first timer means and the second timer means. When it is detected that the elapsed time has become the first set time, which is longer than the second set time, before the other time reaches the second set time based on the measurement result of the first set time, reset means for resetting the measurement results of the timer means and the measurement results of the second timer means; and a regeneration means for indicating that the particulate collection filter cannot be regenerated when the reset means is operated continuously. What is claimed is: 1. A particulate collection filter regeneration device for a diesel engine, characterized in that it is equipped with a disablement display means. 7. A particulate collection filter disposed in the exhaust passage of the diesel engine to collect particulate matter discharged from the combustion chamber of the diesel engine, and a particulate matter collection filter that burns the particulate matter when collected in the particulate matter collection filter. filter regeneration means that operates to regenerate the particulate collection filter, the temperature detection means for detecting the temperature of the particulate collection filter or the exhaust passage adjacent to the particulate collection filter; a playback time measuring timer means for measuring the time during which the detected temperature is higher than the set temperature within the elapsed time based on the detection result of the temperature detection means; and a timer means for measuring the elapsed time based on the detection result of the temperature detection means. a non-reproduction time measurement timer means for measuring the time during which the detected temperature is lower than the set temperature; a measurement result of the reproduction time measurement timer means; and a measurement result of the non-reproduction time measurement timer means. a determining means for determining whether or not regeneration of the particulate collection filter is completed based on the determination result; and a display means for displaying at least one of completion or incompleteness of the regeneration based on the determination result of the determining means. Preparingly, the above-mentioned determining means determines, based on the measurement result of the above-mentioned playback time measurement timer means and the measurement result of the above-mentioned non-playback time measurement timer means, before a certain set time is reached as the measurement result of the above-mentioned non-playback time measurement timer means. particulate collection in a diesel engine, characterized in that the particulate collection filter is configured to determine that regeneration of the particulate collection filter is completed when the measurement result of the regeneration time measuring timer means reaches another set time. Filter regeneration device. 8. A particulate collection filter disposed in the exhaust passage of the diesel engine to collect particulate matter discharged from the combustion chamber of the diesel engine, and a particulate matter collection filter that burns the particulate matter when collected in the particulate matter collection filter. filter regeneration means that operates to regenerate the particulate collection filter, the temperature detection means for detecting the temperature of the particulate collection filter or the exhaust passage adjacent to the particulate collection filter; a playback time measuring timer means for measuring the time during which the detected temperature is higher than the set temperature within the elapsed time based on the detection result of the temperature detection means; and a timer means for measuring the elapsed time based on the detection result of the temperature detection means. a non-reproduction time measurement timer means for measuring the time during which the detected temperature is lower than the preset temperature; and a non-reproduction time measurement timer means that measures the time when the non-regeneration time measurement timer means reaches a certain set time. Resetting means for resetting the measurement results of the playback time measurement timer means and the non-playback time measurement timer means when the measurement results of the playback time measurement timer means have not reached another set time; 1. A particulate collection filter regeneration device for a diesel engine, characterized in that the particulate collection filter regeneration device for a diesel engine is provided with a regeneration impossible display means for displaying that the particulate collection filter cannot be regenerated when the reset means is operated continuously.