JP2875738B2 - Exhaust gas treatment device for internal combustion engine and its treatment method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for collecting particulates (particulate matter) contained in exhaust gas discharged from a diesel engine (internal combustion engine) with a filter and heating the particulates collected by the filter. More specifically, the present invention relates to an exhaust gas treatment apparatus for regenerating the trapping performance of a filter by burning and removing the filter, and more particularly, to an exhaust gas treatment apparatus which uses a microwave as a heating means and uses a microwave in a heating space including a filter. The present invention relates to an exhaust gas processing apparatus that controls the apparatus at the time of collection and at the time of regeneration based on a change in wave amount, and a processing method thereof.

[0002]

2. Description of the Related Art Diesel engines are characterized by higher combustion efficiency and higher durability than gasoline engines, but have the disadvantage of discharging black smoke. Exhaust gas emitted by diesel engines contains nitrogen oxides and particulates that are responsible for respiratory illness, etc., and exhaust gas regulations are being tightened. In response to the stricter regulations, efforts have been made to improve combustion by delaying fuel injection timing and to reduce sulfur in diesel oil.However, there is a technical trade-off between reducing nitrogen oxides and reducing particulates. It is considered that promising solutions are to reduce nitrogen oxides around the engine and treat particulates in the exhaust system. Particulates are mainly SOF (Soluble O
(Rganic Fraction), carbon, and sulfur compounds. As a method for treating these particulates in an exhaust system, an oxidation catalyst system for reducing SOF and a system for collecting particulates using a filter are being promoted. . Since the oxidation catalyst method cannot reduce carbon, a filter method is preferable.

However, in the filter system, if particulates are continuously collected, the filter is clogged, the flow of exhaust gas is deteriorated, and the engine output is reduced or the engine is stopped. On the other hand, technology development for regenerating the collecting ability of filters is currently being promoted all over the world, but securing durability performance is a major practical problem. As a method of reproducing the collection performance of the filter,
A method of burning and removing the particulates in the filter and a method of supplying high-pressure air to the filter to blow the particulates out of the filter to burn and remove the particulates outside the filter have been proposed and developed. The method of processing outside the filter has a problem in completely removing particulates, and the mainstream of the regeneration method is a method of burning and removing inside the filter.

[0004] It is known that particulates burn at about 600 ° C. As means for generating energy for raising particulates to this high temperature range,
A burner method, an electric heater method, a microwave method, and the like have been considered.

[0005] Among these methods, the microwave method has advantages such as good temperature-raising efficiency, safety, ease of device configuration, and good reproduction controllability. In the filter regeneration apparatus using the microwave method, the points for maintaining the filter collection performance are as follows: (1) The collection amount that enables optimal regeneration for the filter is defined.

(2) The amount of particulates trapped inside the filter is controlled with a specified amount (range).

(3) At the time of reproduction, the filter reproduction is executed by an optimum reproduction method based on the trapped amount while considering the surrounding environment including the filter.

[0008] As a method of detecting the trapped amount, a method of detecting the pressure before and after the filter to determine the trapped amount by the filter differential pressure, or a method of determining the trapped amount by utilizing a microwave characteristic that changes depending on the particulate amount. A method is considered.

In the system utilizing the differential pressure, it is necessary to correct the pressure signal detected based on the flow rate and the gas temperature of the exhaust gas. However, the influence of the frequent fluctuation of the engine speed and the change of the exhaust gas temperature accompanying it is required. It is difficult to accurately detect the amount of trapped and collected. In addition, when the regeneration is performed by using the secondary air as the regeneration gas, the flow rate of the regeneration gas is very small compared to the exhaust gas flow rate of the concentration, so the pressure detection using the pressure detection means used for concentration is performed. However, it was difficult to guarantee the accuracy of the detection signal itself.

On the other hand, as a system utilizing microwaves having an advantage of being detectable independently of the exhaust gas flow rate, USP
Nos. 4,477,771, JP-A-61-11416, and JP-A-5-263620.
These methods (the former two) utilize the characteristics of microwave reflection from a heating space including a filter that changes according to the amount of particulates, or the transmission characteristics within the heating space. Because of the entire storage space, it was difficult to accurately detect the progress of particulate combustion during filter regeneration, and it was difficult to grasp the particulate combustion state and feed it back to the regeneration control system. The last (Japanese Patent Laid-Open No. 5-26362)
No. 0) includes a transmission and reception unit inside a filter, and determines the amount of particulates in the filter from the amount of transmission loss that changes in accordance with the change in the amount of particulates present between transmission and reception. However, it is difficult to guarantee the detection accuracy when the distribution of trapped particulates in the filter is not uniform, and it is difficult to grasp the combustion state of the particulates and feed it back to the regeneration control system.

FIG. 11 shows an apparatus disclosed in Japanese Patent Application Laid-Open No. 61-11416, for example, as a filter regeneration processing apparatus using a microwave heating method. In the figure, 1 is an engine, 2 is an exhaust pipe, 3 is a filter, 4 is a microwave heating space, 5 is a magnetron which is a microwave generation means, 6 is a microwave leakage prevention means for limiting the microwave heating space 4, 7 is a microwave supply path for transmitting the microwave generated by the magnetron to the microwave heating space, and 8 and 9 are provided in the microwave supply path to detect a microwave incident wave into the heating space and a reflected wave from the heating space. The detecting means 10 is a control device which controls the operation of the magnetron 5 based on the microwave incident wave, the reflected wave and the signal of the engine operation time. Reference numeral 11 denotes a drive power supply for the magnetron 5, and reference numeral 12 denotes a muffler.

In the above configuration, the particulates contained in the exhaust gas of the engine are collected by the filter 3 when flowing through the filter 3. The amount of particulates collected by the filter 3 increases with the passage of time.
Is operated at a constant cycle. The microwave generated by the magnetron enters the heating space 4 and is transmitted from the exhaust gas inflow side of the filter 3 to the inside of the filter 3 and reaches the downstream heating space wall, where it is reflected and returns to the magnetron via the filter 3 again. come. In this microwave transmission, signals of an incident wave to the heating space 4 and a reflected wave from the heating space are detected, and a change in microwave characteristics of the entire heating space 4 is measured as a voltage standing wave ratio based on these signals. .

If the amount of particulates collected in the filter 3 becomes too large, the load on the engine increases, and in the worst case, the engine stops, so it is necessary to remove the particulates at an appropriate time. The lower limit value of the voltage standing wave ratio corresponding to this appropriate time, that is, at the time of collecting an appropriate amount of particulates, is stored in the control device 10.

When the voltage standing wave ratio obtained from the detected signal falls below the lower limit of the stored voltage standing wave ratio, the output of the magnetron is increased to permit dielectric heating of the particulates collected in the filter 3 and dielectric heating. The particulates are burned and removed by the oxygen contained in the exhaust gas. Further, when the voltage standing wave ratio during regeneration becomes equal to or higher than a predetermined upper limit value, it is determined that the particulate matter trapped in the filter has been completely removed by burning, and the operation of the magnetron is stopped. It is disclosed that the voltage standing wave ratio is corrected by the filter temperature.

[0015]

However, the above-mentioned conventional apparatus has the following problems when collecting particulates and when regenerating the collecting performance of the filter by heating and removing the particulates by burning. doing.

The problem at the time of collection is caused by the fact that the components of the exhaust gas of the internal combustion engine change depending on the operating conditions of the engine.
For example, the particulate component during idling contains a large amount of SOF, while the particulate component during a high-load operation state such as when traveling uphill contains a large amount of dry carbon. Considering a case where a particulate containing a large amount of SOF continuously flows into the filter as one problem example, it is difficult to perform accurate detection according to an increase in the amount of trapped particulate in the filter with the conventional device. Yes, for the collection amount determined by the collection amount detection signal,
There is a problem that the amount actually collected is considerably larger.

The problem at the time of reproduction is caused by the poor accuracy of the amount collected at the time of collection. The conventional device eliminates the feedback control during heating and combustion, and heats and removes particulates by the predetermined regeneration control.If the actual trapping amount is large relative to the detected trapping value, abnormal high temperature It is difficult to avoid burning. Further, when the actual trapping amount is smaller than the detected trapping amount value, there is a problem that heating does not proceed and good combustion is not caused, resulting in unburned residue.

The present invention has been made to solve the above-mentioned problems, and accurately determines the amount of particulates collected by a filter when the internal combustion engine is operating, that is, when the filter is collecting particulates, in consideration of operating conditions. An exhaust for an internal combustion engine that provides a method for detecting and that guarantees practical processing performance of executing a filter regeneration process based on the detected trapping amount and regeneration control content determined based on the environment around the filter at the time of regeneration. An object of the present invention is to provide a gas processing apparatus and a processing method thereof.

[0019]

According to the present invention, there is provided a filter for collecting particulates contained in exhaust gas discharged from an internal combustion engine, a heating space containing the filter, Microwave generation means for generating microwaves for supplying power to the heating space from the exhaust gas discharge side of the filter, gas supply means for supplying gas containing oxygen to the heating space from the exhaust gas discharge side of the filter, and an internal combustion engine. A first valve disposed on a branch pipe branched from an exhaust pipe between the heating space and a second valve disposed on an exhaust pipe between the heating space and the atmosphere; Microwave detection means for detecting the amount of microwave at a predetermined position, temperature detection means disposed in the exhaust pipe between the heating space and the branch pipe, means for detecting the operation non-operation of the internal combustion engine,
Microwave generation means and gas supply means, and control means for controlling the operation of the first valve and the second valve, respectively, the control means, the integrated value of the operating time of the internal combustion engine and the microwave detection signal It has a trapping amount determination map defined as a variable, a detection signal of the microwave detection means obtained by periodically operating the microwave generation means, and an integrated value of the operation time of the internal combustion engine at the time of detecting the signal. Is compared with the collection amount determination map to determine the current collection amount, and means for informing information obtained by this determination.

The control means has a lower limit value and an upper limit value of the trapping amount for which filter regeneration is permitted, and the notifying means determines whether or not the control means has determined a predetermined trapping amount range in which filter regeneration is permitted. There is provided a means for discriminating whether or not the collected amount is within the permitted range or outside the range.

In performing the regeneration of the filter, the control means controls the first valve to be open and the second valve to be closed, and then operates the gas supply means to detect the detection signal of the temperature detection means. And determining whether the control state of each valve is good or bad based on the temporal change of the detection signal.If the control means determines that the internal combustion engine has stopped operating, the control means determines whether the internal combustion engine has stopped operating. When counting is started and the internal combustion engine is operated during this counting period, the count value is reset.When a regeneration execution command of the filter is received during this counting period, the count value at that time is entered into the regeneration execution process. We are going to move.

The stop time counted by the control means has a predetermined upper limit value, and when the stop time exceeds the upper limit value, the stop time count value thereafter is set to this upper limit value.

Further, the control means includes a microwave generation means and a microwave generation means based on the filter temperature information determined from the count value of the stop time and the detection signal of the temperature detection means and the trapping amount information obtained during operation of the internal combustion engine. The operation of each of the gas supply means is controlled.

In the regeneration of the filter, the control means captures a microwave detection signal before and after the start of the operation of the gas supply means after the operation of the microwave generation means is started, and based on a temporal change of the detection signal. The operation of the gas supply means is continued or stopped for a predetermined time, and the detection signal of the temperature detection means is taken in immediately before the end of the regeneration, and if the detection signal exceeds a predetermined value, the detection signal is The operation of the gas supply means is to be continued until the temperature becomes equal to or less than a predetermined value, and when the detection signal of the temperature detection means immediately before the end of the regeneration becomes equal to or less than the predetermined value, the first valve is controlled to a closed state, It is determined that the first valve is in the closed state based on a temporal change of the detection signal of the detection means.

In a method for collecting particulates contained in exhaust gas discharged from an internal combustion engine by a filter and removing the particulates from the filter, the operation time of the internal combustion engine is reduced when the internal combustion engine is operated. Microwaves are fed periodically to the heating space containing the filter while integrating, and the amount of microwaves at a predetermined position in the heating space is detected and collected by the filter based on the integrated operation time and the amount of microwaves. Determining the current trapped amount of the collected particulates and reporting the current trapped amount; counting the stop time of the internal combustion engine when the internal combustion engine is stopped; and operating or operating the internal combustion engine. A step of bringing the processing device into a regeneration execution state based on the regeneration execution command at the time of stoppage, and supplying a gas containing oxygen to the filter and executing the filter before the regeneration. Detecting the temperature of the subsequent gas, determining the current temperature of the filter based on the detected temperature and the count value of the stop time, and based on the current temperature of the filter and the trapped amount obtained during operation of the internal combustion engine. Determining the control content of the reproducing apparatus, based on the determined control content, performing dielectric heating of the particulate by microwave, and after dielectric heating the particulate to a predetermined temperature, supplying a gas containing oxygen to the filter. Burning the particulates by supplying the microwave and the gas, stopping the supply of the microwave, continuing the supply of the gas to the filter for a predetermined time, and bringing the processing device into a collecting execution state. Including.

After dielectric heating of the particulates, the quality of the gas supply start time is determined based on the time variation of the microwave signal detected before and after the supply of the gas containing oxygen to the filter. And determining whether to continue the gas supply or supply after stopping for a predetermined time, step (h).
Is determined based on the fact that the detected temperature signal becomes equal to or less than a predetermined value.

[0027]

In the above construction, in the trapping amount determination map, the temperature of the exhaust gas is included in the microwave detection signal, and the properties of the particulates to be discharged are included in the integrated value of the operation time. The trapping amount is determined by comparing the detection signal of the microwave detecting means periodically captured in the map including the operating conditions of the internal combustion engine with the integrated value of the operating time of the internal combustion engine at the capturing time. The reliability of quantity determination can be guaranteed.

Also, by informing the notifying means provided with the identification means for permitting the execution of the regeneration to notify the current trapped amount, the upper limit value of the trapped amount permitted for the user of the internal combustion engine is reduced. Thus, it is possible to notify the prediction of the use time from the present, to inform the efficient use condition of the internal combustion engine, and to know at what timing the regeneration should be executed, so that the practical value can be increased.

In controlling regeneration, each valve is controlled to the regeneration execution state, and then the control state of each valve is determined based on a change in the temperature detection signal obtained by operating the gas supply means, thereby adding extra parts. The reliability of the device can be assured without any trouble.

The filter temperature at the start of regeneration is estimated based on the stop time counted when the internal combustion engine is stopped and the gas temperature passed through the filter immediately before the start of regeneration. The dielectric heating time of particulates can be controlled to a favorable time to prevent insufficient heating or overheating.

The detection of the amount of microwaves is periodically performed during the operation of the internal combustion engine, is not performed during the stop of the internal combustion engine, and is performed during a predetermined time period during execution of the regeneration. The detection signal during the reproduction is used as a feedback signal to enhance the reliability of the reproduction control.

As the dielectric heating of the particulate proceeds, the amount of dielectric loss inside the filter increases, and the amount of microwave near the microwave detecting means decreases. Therefore, the detection signal has a gradually decreasing characteristic. When a gas that promotes combustion is supplied in this state, the particulates in the region that has been heated and reached the combustible temperature shift to the combustion state. Since the microwave supplied to the filter avoids this combustion region, the amount of microwaves near the microwave detecting means increases. Using this phenomenon, it is not possible to determine whether the heated particulate has transitioned to the combustion state based on the temporal change in the amount of microwaves detected before and after the time when the gas supply is started during the regeneration. It is determined whether or not the regeneration control is appropriate based on the determined trapping amount and the filter temperature, thereby providing a highly reliable apparatus that avoids abnormal combustion during particulate combustion.

The current residual combustion state of the filter is determined based on the temperature signal taken immediately before the end of the regeneration, and when it is determined that the residual combustion is large, the gas supply is continued to extinguish the particulate combustion almost completely. As a result, even if the exhaust gas is caused to flow immediately after the end of regeneration, abnormal thermal stress generation in the filter can be avoided, and the durability of the filter can be guaranteed.

[0034]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

1 and 2, reference numeral 13 denotes an exhaust pipe for discharging exhaust gas from an internal combustion engine (diesel engine) 14.
Reference numeral 15 denotes a heating space provided in the middle of the exhaust pipe 13, reference numeral 16 denotes a filter having a honeycomb structure which is housed in the heating space and collects particulates contained in the exhaust gas while the exhaust gas passes, and reference numeral 17 denotes a particulate filter. Microwave generators 18 and 19 for generating microwaves to feed the heating space for dielectric heating of the curates are provided with a coaxial transmission line for transmitting the microwaves generated by the microwave generating means 17 to the heating space 15 and an annular transmission line. Rectangular waveguide, 20, (2
1) is a power supply hole for supplying microwaves to the heating space, and 22 is a coaxial waveguide conversion antenna.

Reference numeral 23 denotes an exhaust gas switching valve, which normally causes exhaust gas discharged from the internal combustion engine 14 to flow through the filter 16. When the filter 16 is regenerated, the valve position is switched to switch the exhaust gas to the exhaust branch pipe 24. Through. 25 is a muffler. 26 is a gas supply means for generating a gas containing oxygen to be supplied into the heating space 15;
Reference numerals 7 and 28 denote valves for controlling the flow of the gas containing oxygen to the filter 16, and a first valve 27 is a discharge passage for the gas which is branched from the exhaust pipe 13 and flows through the filter during regeneration. The second valve 2
Reference numeral 8 designates one end of the heating space 15 and the exhaust branch pipe 24 as the exhaust pipe 13.
These two valves are controlled to control the two valves so that gas that promotes the combustion of the heated particulates during filter regeneration flows through the filter 16.
Reference numeral 30 denotes a microwave detecting means provided in the exhaust gas non-flow space of the filter 16 and detecting the amount of microwaves present in the vicinity of the installation space by the operation of the microwave generating means 17, and has a coaxial line structure. The center conductor 31 is projected into the heating space 15 by a predetermined length. The signal detected by the detection means 30 is input to a control means 33 which is an electronic control unit (ECU) via a coaxial line 32. Reference numeral 34 denotes an alternator, which inputs an output signal corresponding to the non-operation of the internal combustion engine 14 to the control means 23. A temperature detecting means 35 is provided in an exhaust pipe between the heating space 15 and the branch pipe 29. The temperature detecting means 35 detects the temperature of exhaust gas when the internal combustion engine is operating, and detects the temperature of the filter 1 during regeneration.
The temperature of the gas flowing through 6 is detected. This detection signal is input to the control means 33. Although only one microwave detecting means 30 is shown, a plurality of microwave detecting means 30 may be provided. When a plurality of filters are provided, they are disposed in parallel with the exhaust gas flow direction of the filter.

The heating space 15 is provided with microwave shielding means 36, 3 having a punching hole structure or a honeycomb structure.
7, the space for substantially confining the microwave is limited. 38 is the outer periphery of the filter 16 and the heating space 15
And a heat insulating material provided between the tube wall 39 and the filter wall, and also serves as a support for the filter. The space in which the heat insulating material 38 is arranged blocks the flow of the exhaust gas and suppresses the exhaust gas from being discharged from the periphery of the filter to the atmosphere when the exhaust gas flows through the filter 16.

The microwave detecting means 30 includes the heat insulating material 3
The amount of microwaves in the space provided with 8 is detected. Reference numeral 40 denotes a drive power source for the microwave generation means 17, and reference numeral 41 denotes a pipe for conveying gas generated by the gas supply means. Reference numeral 42 denotes a notification unit, and the control unit 33 determines the amount of particulates collected by the filter 16 and outputs the result.

Reference numeral 43 denotes a reproduction execution command (start) manually given from the outside, and the control means 33 monitors this command.

Reference numeral 44 denotes a failure diagnostic device which is connected to the control means 33 when an abnormality occurs in the device, monitors the content of the failure, checks the normality of the device after repair, or resets the system.

The control means 33 has a collection amount determination map in which the integrated value of the operation time of the internal combustion engine and the microwave detection signal are defined as variables, and the collection amount for permitting regeneration of the collection performance of the filter. Are stored in advance. Microwave generation means 1 periodically during operation of the internal combustion engine
7 is operated to compare the amount of microwaves detected by the microwave detection means 30 with the integrated value of the operating time of the internal combustion engine at the time of the detection with the above-mentioned collection amount determination map to determine the current collection amount. . This determination result is output to the notification means 42,
It is displayed on the notification means.

The annular rectangular waveguide 19 is connected to the exhaust gas exhaust pipe 4.
The power supply holes 20 and 21 provided substantially facing the pipe wall of No. 5 are arranged at the end. 180 ° from these two feed holes
The antenna 22 for coaxial waveguide conversion is disposed at a desired position of the annular rectangular waveguide 19 so that microwaves are radiated into the heating space 15 with a phase difference of.

The exhaust gas discharged from the internal combustion engine 14 is usually
The gas flows through the exhaust pipe 13 and flows into the filter 16. The filter 16 is formed of a wall flow type honeycomb structure and has a function of collecting particulates contained in exhaust gas. When the amount of particulates collected by this filter increases, the pressure loss of the filter increases, the load on the engine as the internal combustion engine increases, and in the worst case, the engine stops.

Therefore, it is necessary to remove the particulates collected by the filter at an appropriate time. At this appropriate time, when the control unit 33 receives an external regeneration execution command when the current collection amount displayed on the notification unit 42 is within the collection amount range identified and displayed as a range in which filter regeneration is permitted. Judgment based on By this determination, the particulates collected by the filter are removed by heating and burning. This step of removing particulates is called filter regeneration. Before describing the processing method at the time of the filter regeneration, each element will be described.

FIG. 2 shows an embodiment of the notification means 42. In the figure, reference numerals 46 to 50 denote display units for displaying the current collection amount, 51 denotes a lamp which is lit when the reproduction is being executed, and 52 denotes a lamp which is lit when an abnormality has occurred in the apparatus. Numeral 53 indicates a trapping amount for which the execution of the filter regeneration is permitted. When the display units 47 to 49 corresponding to this range are lit, the control unit 33 receives the regeneration execution command 43.
Has allowed.

FIG. 3 shows an embodiment of the trapping amount determination map. In the figure, the integrated value of the operating time of the internal combustion engine is a map in which the time is increased from left to right, and the microwave detection signal is a map in which the signal level is increased from bottom to top, and one column of the integrated value axis of the operating time is shown. Is a short time when the integrated value is small, and a large time when the integrated value is large. For example, if the cycle for operating the microwave generating means during the operation of the internal combustion engine is 10 minutes, the time in one column is 10 minutes until the integrated value is 120 minutes, and in the area of the integrated value exceeding 120 minutes, The time in one column is 20 minutes. In addition, the same method is adopted for one column of the microwave detection signal value axis, and when the microwave detection signal value is equal to or less than a predetermined value,
The signal value width in one column is narrowed. FIG. 3 shows an embodiment in which the collection amount level is set in each of the division columns for the map thus divided. The numbers shown in the figure represent the level of the collected amount. If the current collection amount determined by this determination map is the number [0], the notification amount display of the notification means is performed as shown in FIG.
The display section indicated by 46 lights up. The number at the time of judgment is [1]
In this case, the display units 46 and 47 in FIG. 2 are turned on. When the number is [2], the display units 46, 47 and 48 in FIG. 2 are turned on. When the number is [3], the display units 46 to 49 in FIG. At times, all the display units 46 to 50 in FIG.

FIG. 4 controls the exhaust gas switching valve 23 when performing the filter regeneration. When the internal combustion engine is operating, the exhaust gas is distributed to the exhaust branch pipe 24.
Thereafter, the first valve 27 is opened and the second valve 28 is opened.
Is controlled to a closed state to operate the gas supply means 26. The temperature detecting means 35 detects the temperature of the gas after passing through the filter. 5 shows an example of a temporal change characteristic of the detection signal. In the figure, reference numeral 54 denotes a temperature change characteristic when each of the valves 27 and 28 is controlled to a normal state. When the closed state of the second valve 28 is abnormal, when the internal combustion engine is not operating, the gas supplied from the second valve 28 to the atmosphere flows, so that the gas flow rate flowing through the filter 16 decreases, and FIG. The temperature change characteristic indicated by 55 is obtained. In addition, when the internal combustion engine is operating, the flow of the exhaust gas from the second valve 28 causes a flow rate larger than the gas flow rate supplied by the gas supply means to flow through the filter 16, so that the rise of the temperature signal becomes 54 in FIG. Faster than 5 (5 in the figure)
6). On the other hand, when the open state of the first valve 27 is abnormal, the temperature change characteristic indicated by 55 is obtained when the first valve 27 is half open, and the temperature change characteristic indicated by 57 is obtained when the first valve 27 is closed. Based on this phenomenon, it is determined whether the controlled state of each valve is normal or abnormal. The characteristic indicated by 57 occurs even when the temperature of the filter is room temperature and the operation of each valve is normally controlled. In order to identify this, the control means 33 takes in the ambient temperature information to make it correspond.

FIG. 5 is a block diagram of an exhaust gas treatment apparatus for an internal combustion engine showing another embodiment of the present invention. The difference from the configuration of FIG. 1 in FIG. 1 is that the exhaust branch pipe 23 is not provided. The processing device having such a configuration executes the filter regeneration only when the internal combustion engine is not operating. Parts having the same or the same functions as those in FIG. 1 are indicated by the same numbers. In this processing device, since the filter regeneration is executed after the internal combustion engine is stopped, counting the stop time of the control means 33 after the internal combustion engine is stopped has an effect at the time of the regeneration.
The control method described below is also used in the embodiment of FIG. That is, the counting of the stop time resets the stop time when the internal combustion engine is operated before the control unit 33 receives the regeneration execution command 43. On the other hand, when the control unit receives the regeneration execution command while the stop time is being counted, the control unit shifts to the regeneration execution process with the stop time count value at that time.

Prior to the start of regeneration, the current filter temperature is measured. In this measurement, after the valves 27 and 28 are controlled to open and close, respectively, the temperature of the gas flowing through the filter 16 obtained by operating the gas supply means 26 is detected by the temperature detection means 35. The detected temperature value used for determining the filter temperature is a temperature signal detected when a predetermined time has elapsed after the start of the operation of the gas supply means. The current filter temperature is determined based on the temperature signal and the stop time count value. The normal state of each valve is determined based on the above-described contents based on the temporal change of the temperature signal obtained when the gas supply means is operated.

The filter regeneration processing is performed by the microwave generation means 1
7 and the operation of the gas supply means 26 are controlled. The contents of this control are determined by the control means 33 based on the trapping amount information obtained during the operation of the internal combustion engine and the filter temperature information obtained by the above method immediately before the execution of the regeneration. This determination is made based on a predetermined reproduction control content determination map of the control means 33.

Next, the control executed immediately before the end of the reproduction will be described. The control executed immediately before the end of the regeneration is performed based on the temperature signal detected by the temperature detecting means 35. The control means 33 non-volatilely stores a predetermined reference temperature signal corresponding to a temperature detection signal measured when the particulate combustion in the filter is completed. If the temperature signal value detected immediately before the end of the regeneration exceeds the reference temperature signal, the operation stop time of the gas supply means determined by the regeneration control content determination map is extended. This extended time is terminated when the detected temperature signal falls below the reference temperature signal.

FIG. 6 shows a processing method of the present invention which is executed using the configuration of the apparatus described above and the main control contents.
This will be described with reference to FIG.

The stages of the control contents will be roughly described in (1) when the internal combustion engine is stopped, (2) when the internal combustion engine is operating, (3) when performing regeneration, and (4) when performing maintenance processing.

First, the contents of the control means when the internal combustion engine is stopped will be described. In this state, the start of the internal combustion engine is monitored in S100, the stop time after the internal combustion engine stops operating is counted in S101, the input of the regeneration execution command is monitored in S102, and the failure diagnosis is performed in S103 and S104. The command from the device 44 is monitored. The stop time is counted with, for example, 150 minutes as the maximum value. For the stop time exceeding the upper limit, the count value of the stop time is set as a predetermined upper limit. This upper limit value is set with reference to the time when the filter becomes equivalent to the ambient temperature by natural cooling.

In this stopped state, when the internal combustion engine starts operating, this is determined in S100, and the process proceeds to the control stage in which the internal combustion engine is operating. In this transition, the stop time count value is reset. In this state, the stop of the operation of the internal combustion engine is monitored in S110, and in S111
, The operation time of the internal combustion engine is integrated, the regeneration execution command (START Key) is monitored in S112, it is determined whether it is time to detect the microwave amount in S113, and if it is before the detection time, the process returns to S110 to detect. S1 if the time has passed
Proceed to 14. In S114, the microwave generation means 17 is operated to capture the amount of microwaves detected by the microwave detection means 30, and in S115, the integrated value of the operation time and the captured microwave detection signal are compared with the collection amount determination map. The current collection amount is determined, and the result is output to the notifying unit 42. After that, the next microwave amount detection time is defined, and the process returns to S110.

The detection of the microwave amount is performed periodically (for example,
10 minutes). It is possible to recognize how long the internal combustion engine can be operated in the future while inspecting the current trapped amount display output to the notifying means 42. In addition, when it is within the collection amount range in which the regeneration is permitted, it can be determined that the regeneration process is executed at an arbitrary timing. When the internal combustion engine is stopped and the regeneration process is executed, or when the internal combustion engine is stopped for a purpose other than the purpose, in S110,
The stop of the internal combustion engine is determined, and the process returns to the control stage at the time of stop. In this stage shift, the integrated value of the operating time up to the present time, the next microwave amount detection time, and the collection amount notification data are stored.

On the other hand, when the regeneration process is executed during the operation of the internal combustion engine, it is determined in S112 that the regeneration execution command 43 has been input, and the flow shifts to S120. Even in this transition, the integrated value of the operating time up to the present time, the next microwave amount detection time, and the trapped amount notification data are stored.

When a reproduction execution command 43 (START Key) is input in the control stage at the time of stop, this input is determined in S102, and the process shifts to the control stage of reproduction execution. In this transition, the stop time count value of the internal combustion engine is stored.

In the state of the reproduction control stage, S1
In step 20, the normal state of the apparatus is confirmed. In step S121, the normal state is determined. If the state is normal, the process proceeds to step S122. In step S122, the apparatus is set to a reproduction execution state. Specifically, the operation of the exhaust gas switching valve 23, the first valve 27, and the second valve 28 is controlled to a desired state. Thereafter, the gas supply means 26 is operated to determine whether the controlled state of the valve is normal and to determine the current temperature of the filter 16 based on the stop time count value and the detection signal of the temperature detection means 35. I do. In S123, it is determined whether or not the current trapping amount exceeds the upper limit value of the trapping amount range in which the predetermined regeneration is permitted. If the trapping amount exceeds the upper limit, the control content different from the normal time is selected (S12).
5b) to perform a reproduction process. If the current collection amount is a collection amount that permits regeneration execution, the process proceeds to S124. In S124, it is determined whether or not the reproduction is to be executed in a state where the reproduction is interrupted due to some abnormality occurring during the reproduction process. In the case of the reproduction suspended state, the control content different from the normal state is selected (S1).
25c) to perform a reproduction process. If the reproduction is not interrupted, the process proceeds to S125a. In S125a, the control content for the regeneration execution process is selected based on the trapping amount obtained during the operation of the internal combustion engine and the current filter temperature obtained in S122.

FIG. 7 shows an embodiment of this control content. The control objects are the microwave generation means 17 and the gas supply means 26, and FIG. 7 shows the contents of control of how and when they are operated. The description of FIG. 7 will be described later.

The filter regeneration is executed based on the control contents determined in S125a-c (S126). It is determined whether the apparatus is operating normally during the control of the execution of the filter regeneration (S127 to S129). In the case of abnormality, the abnormality lamp of the notification means 42 is turned on to stop the reproduction, and S130
Proceed to. The apparatus operates normally during execution of the reproduction, and when the reproduction end time is reached, the process proceeds to S130. In S130, the apparatus is set in a state where the flow of exhaust gas is permitted to the filter. Specifically, the first valve 27 and the second valve 28 are controlled to be in a closed state and an open state, respectively. After that, S131
Check that each valve is properly controlled. S13
The determination is made in step 2, and if the operation is normal, the stage returns to the stop stage. If the operation is abnormal, the abnormal lamp is turned on and the operation returns to the stop stage.

Prior to the transition to the stop stage, in the embodiment of the present invention shown in FIG. 1, the exhaust gas switching valve 23 is switched and controlled.

In the transition from the reproduction execution stage to the stop time stage, if the operation and the reproduction state of the apparatus are normal, the integrated value of the stored operation time, the next collection amount detection time, the collection amount display Reset data and stop time counts. When there is an abnormality, a flag corresponding to the content of the abnormality is set and the process is shifted. Further, in the case of an abnormality related to a reproduction failure, only the collection amount display data and the stop time count value are reset and the process proceeds.

Next, the stage during maintenance will be described. The shift to this stage is executed by connecting the failure diagnosis device 44 to the control means 33 when the internal combustion engine is stopped.
After connection, the mode switch (MODE Key) or the reset switch (RESET Ke
y) is received by the control means (S)
103 and S104).

Each control content at the time of failure diagnosis will be described below. When only the mode signal is received, the control unit 33
Is output to the failure diagnosis device 42 and displayed on the monitor screen of the failure diagnosis device (S140). From this display, the contents to be maintained are determined.

When only the reset signal is received, the apparatus resets all information stored during operation (S
150).

When the maintenance is completed, the mode signal and the reset signal are transmitted simultaneously. When the two signals are received at the same time, the process proceeds to S160. In S160, it is determined whether to execute the reproduction. This judgment is
The regeneration execution command switch (Re
genSW) to monitor and execute the signal. If there is no reproduction execution command, the process proceeds to S161. In step S161, it is confirmed that each unit operates normally by operating the apparatus according to predetermined control contents. This determination is performed in S162, and if normal, the process returns to the stage at the time of stop. When an abnormality is confirmed, the abnormality lamp is turned on, the process returns to the stage at the time of stop, the content of the abnormality is confirmed according to the above-described procedure, and the maintenance process is performed.

In the replacement of the filter 16 in the maintenance processing, the maintenance processing is completed, and after confirming that the state of the apparatus is normal, a reset signal is sent from the failure diagnostic apparatus 42 to the control means 33 in the stage at the time of stoppage. (S170).

When a reproduction execution command is received at S160, the process proceeds to S120. The control procedure after S120 is as described above. That is, in determining the control content, the control content is determined through execution of determination as to whether or not excessive collection is performed and determination as to whether or not reproduction is interrupted.

Next, with reference to FIGS. 7 to 10, detailed control contents during execution of reproduction will be described. FIG. 7 is a timing chart of reproduction control contents, and FIGS. 8 to 10 are control flows.

A description will be given based on the control flows of FIGS. 8 to 10 with reference to FIG. In FIG. 8, when a regeneration execution command is received when the internal combustion engine is operating or stopped, S
Move to 200. In S200, the lamp 51 mounted on the notifying unit 42 for notifying that the reproduction is being performed is turned on. S2
01 controls the second valve to be closed, and S202 controls the first valve to be open. In step S203, the operation of the gas supply unit 26 is started, and a signal obtained by detecting the temperature of the gas flowing through the filter 16 in step S204 by the temperature detection unit 35 is fetched. This temperature capture is, for example, a total of 1 every 10 seconds.
Capture two data. When the data acquisition is completed, the operation of the gas supply means is stopped in S205. Then, S
At 206, a determination is made as to whether the two valves are properly controlled to permit regeneration. This determination is based on the contents described with reference to FIG. 4 based on the twelve acquired temperature data. If abnormal, S207, S
After returning each valve of 208 to the original state, it progresses to S201. If it is determined in S206 that the state of the valve is normal, S2
Go to 09. Although not shown, the valve normality determination process is prohibited from continuing forever in this process. As the control, for example, in the case where the normality is not determined after repeating the normality determination process three times, the abnormal lamp is lit and the stage is stopped. In S209, the operation of the microwave generation means 17 is started. This time is time t0 in FIG. Thereafter, in S210, the current filter temperature is determined based on the last temperature data acquired in S204 and the stop time count value stored in the control means.

Thereafter, in S211, it is determined whether or not the trapping amount data determined during the operation of the internal combustion engine is within a trapping amount range in which regeneration is permitted. If the amount collected is outside the specified range, S
Proceed to 213b. If it is within the predetermined range, the process proceeds to S212, and it is determined whether or not regeneration has been performed on the current filter in the past, but the regeneration has been interrupted due to some abnormality. If the reproduction has been interrupted, S213
Proceed to c. When the reproduction has not been interrupted, the process proceeds to S213a. Steps S213a, S213b, and S213c determine the control contents related to the reproduction execution corresponding to the current reproduction processing state. As for the control contents, control variables corresponding to the respective states are preset and stored in the control means in a nonvolatile manner.
This control variable is information relating to the timing shown in FIG.

When the control content is determined, the process proceeds to S214.
In S214, it is determined whether or not the time has elapsed from the time t1 when the operation of the gas supply means 26 is started by the time tA nonvolatilely stored in the control means, that is, from time t1 to time tA. During this time, microwaves are supplied to the heating space including the filter, and the particulates are dielectrically heated.

At time (t1-tA), S215
To capture the amount of microwaves detected by the microwave detecting means (referred to as Xa). Then, at time t1
(S216). When time t1 is reached,
In S217, the gas supply means is operated to shift the dielectrically heated particulates to a combustion state.

In the following description, tB, tC,
tD, tE and Te are constants stored in the control means in a nonvolatile manner.

Thereafter, in S218, the process waits until time t1 + tB is reached. When the time reaches t1 + tB, the process proceeds to S219, and the amount of microwave at that time is taken (referred to as Xb).

At S220, the acquired microwave amount X
The signals of a and Xb are compared. This comparison determination is performed based on the condition Xa <Xb when the dielectrically heated particulates have transitioned to the combustion state. This judgment is false (N
In the case of o), it is determined that the state has not shifted to the combustion state, and the operation of the gas supply unit is stopped (S222), and the promotion of the dielectric heating is continuously performed. The time at which the gas supply is restarted after the stop is specified in S223. This gas supply stop (S
222), the time t2 at which the operation mode of the microwave generating means 17 is changed in S221 and the current time t
Compare with When the current time t has not reached the time t2, the process proceeds to S222. If the current time t has reached the time t2, the process proceeds to a loop control flow including a control flow for determining whether there is an abnormality in the operation of the system. S22
If the determination of 0 is true (Yes), the process proceeds to the above-described loop control flow. In the loop control flow, when time t3 is reached, the operation mode of the gas supply means is changed (not shown). When the time t4 is reached, the process proceeds from S224 to S225, and the operation of the microwave generating means is stopped.

The loop control flow proceeds to step S227 immediately before time t5 when the current time t stops the operation of the gas supply means, that is, until time t5-tD, and checks whether the system operation is normal. And S228
Executes that determination. If it is determined in S228 that there is an abnormality, the process proceeds to S229, in which the abnormality lamp of the notification unit is turned on, and the process exits the loop control flow. If it is determined in S228 that it is normal, the process returns to the loop control flow. When the current time reaches t5-tD, the process proceeds from S226 to S230. At S230, the temperature detection signal is fetched (Ta),
In step S231, the reference temperature signal Te is compared with the acquired Ta. When the taken temperature signal Ta is higher than the reference temperature, it is determined that the burning of the particulates has not been extinguished, and the process proceeds to S232. In S232, the operation of the gas supply means is extended and continued for the time tE, and the flow returns to the loop control flow again. When the temperature Ta taken in S231 is lower than the reference signal Te or when it becomes lower, the process proceeds to S233.

In step S233, the first valve is controlled to be closed, and the flow advances to step S234. In S234, a signal from the temperature detecting means is fetched. In S235, it is determined whether the first valve has been correctly controlled to the closed state based on the temporal change in the temperature taken in this step. In this case, the determination is made based on the fact that the change in the temporal temperature signal is equal to or less than a predetermined value. If the controlled state of the first valve is abnormal,
Proceed to S236. In S236, the first valve is opened again, in S237 it is closed again, and in S238, S234 is opened.
The temperature signal is acquired in the same manner as in step S239 and S235.
And the same method is used. When this determination is true, S241
Proceed to. If the determination is false, the abnormal lamp is turned on in S240 and the process proceeds to S241. In S241, the operation of the gas supply unit is stopped.

At S242, the second valve is controlled to the open state, and at S243, it is determined whether or not the controlled state is normal. This determination is made by a signal from a hardware component such as a limit switch or a rotational position detection sensor. If it is determined in S243 that there is an abnormality, the process proceeds to S24
Proceed to 4. In S244, the second valve is closed again,
At S245, the second valve is controlled to open again, and at S24
In S6, a determination is made in the same manner as in S243. S246
If the determination in step is true (Yes), the process proceeds to S248. S24
If the determination in Step 6 is false (No), the process proceeds to S247, turns on the abnormal lamp, and proceeds to S248.

In S248, when the regeneration is normally performed, the integrated value of the operation time of the internal combustion engine, the next collection amount detection time, the collection amount display data, and the stop time count value are reset to stop. Move to the stage of time. In S248,
If any abnormalities occur during the execution of the regeneration, all the flags set according to the details of the abnormalities are stored, the collected amount display data and the stop time count value are reset, and the stage shifts to the stop state. .

Whether the abnormality has occurred during the execution of the reproduction or whether the reproduction has been performed under the normal state can be recognized by the lighting / non-lighting of the abnormal lamp of the notification means. Upon completion of the regeneration under the normal condition, the exhaust gas can be caused to flow through the filter just regenerated at an arbitrary timing to collect the particulates contained in the exhaust gas. On the other hand, when the abnormal lamp is turned on, the details of the abnormality are confirmed using the failure diagnosis device, and the subsequent processing is performed.

In the regeneration control described above, the current filter temperature is determined before the filter regeneration is performed, and the content of the regeneration control is determined in consideration of the information. Therefore, in the dielectric heating of the particulates by the microwave, In addition, overheating and insufficient heating can be prevented. Further, by detecting the detection signal of the microwave detection means before and after the gas supply time after the dielectric heating and determining whether or not the combustion state has been achieved by the gas supply, it is possible to avoid a regeneration failure due to insufficient heating.

In addition, when performing the regeneration in the collection amount state other than the collection amount range in which the predetermined regeneration is permitted, a regeneration control content different from the normal one is selected, and the reproduction control content outside the predetermined collection amount range is selected. Since the reproduction can be executed in the, the convenience can be improved.

The particulate combustion state of the filter is determined based on the temperature information immediately before the end of the regeneration, and when it is determined that the residual combustion exists, the combustion can be extinguished by extending the gas supply. As a result, the generation of thermal stress in the filter due to the exhaust gas flowing into the filter immediately after the completion of the regeneration can be suppressed, and the durability performance of the filter can be guaranteed.

In the step of setting the apparatus after the regeneration to the trappable state, the controlled state of the first valve is determined by operating the gas supply means.
The closed state of the first valve can be guaranteed with high accuracy.

In the apparatus configuration of the embodiment of the present invention shown in FIG. 1, an exhaust gas treatment device can be mounted on the exhaust branch pipe. In this case, a set of the above-described processing apparatus of the present invention may be mounted. In such a configuration, the exhaust gas is caused to flow through only one of the filters to collect the particulates, and the exhaust gas switching valve 23 is controlled when the collected amount exceeds the lower limit of the allowable collected amount. Then, after the exhaust gas is distributed to the other filter, a regeneration execution command is automatically transmitted in the control means, so that the one filter can be subjected to a regeneration process.

The transmission of the reproduction execution command at this time may be executed from outside the control means. As described above, it is possible to provide a device that perpetuates the trapping performance of a filter, which is a fundamental object of the present invention, and a predetermined position in a heating space including a filter as a practical device for achieving the object. Is used as a signal for determining the current trapped amount during operation of the internal combustion engine, and as a signal for grasping the combustion state of the particulates during filter regeneration.

[0089]

As described above, according to the processing method of the exhaust gas processing apparatus for an internal combustion engine of the present invention, the following effects can be obtained.

(1) The current trapping amount is determined based on the integrated value of the microwave amount and the operating time periodically detected during the operation of the internal combustion engine, so that the current trapping amount varies depending on the operating state of the internal combustion engine. It is possible to determine the trapping amount with high accuracy including the exhaust gas temperature and the properties of the particulates contained in the exhaust gas.

(2) The practical value of the internal combustion engine can be greatly increased by notifying the determination result.

(3) Providing a trapping amount range for permitting regeneration enables regeneration to be performed at an arbitrary timing, thereby improving the convenience of the internal combustion engine and the processing device.

(4) The usability of the internal combustion engine can be enhanced by providing the notifying means with the means for identifying the collection amount range in which the regeneration is permitted.

(5) As the determination of the control state of the valve, the time change of the gas temperature after flowing through the filter under the operation of the gas supply means is used as the determination signal, so that extra parts are required. Effective judgment can be made without the need.

(6) The stop time from the stop of the operation of the internal combustion engine to the start of regeneration can be counted, so that the timing for executing regeneration can be freely determined. Can be improved.

Further, by counting the stop time, it is possible to judge the filter temperature at the time of the regeneration, and it is possible to perform the regeneration satisfactorily, and to perform the regeneration when the internal combustion engine is stopped.

(7) Based on the amount of microwaves detected before and after the gas supply time after the start of regeneration, it is determined whether or not the particulates have transitioned to a combustion state by gas supply. By stopping the supply and continuing the heating by the microwave, poor regeneration due to insufficient heating can be prevented, and the collection performance after the filter regeneration can be guaranteed.

(8) Based on the temperature signal detected immediately before the completion of the regeneration, the combustion state of the particulates in the filter is determined, and the corresponding measures are taken, so that the exhaust gas flows to the filter immediately after the completion of the regeneration. Can prevent the filter from being mechanically damaged.

(9) The control state when the first valve is set to the closed state before the end of the regeneration is set to the time change of the temperature signal corresponding to the absence of gas flow under the operation of the gas supply means. , The closed state can be determined with high accuracy.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an exhaust gas treatment apparatus for an internal combustion engine according to one embodiment of the present invention.

FIG. 2 is a configuration diagram of a notification unit of the exhaust gas processing apparatus for the internal combustion engine.

FIG. 3 is a configuration diagram of a trapping amount determination map of the exhaust gas treatment apparatus for the internal combustion engine.

FIG. 4 is a characteristic diagram of a temperature detection signal in a pre-regeneration execution process of the exhaust gas processing apparatus for the internal combustion engine.

FIG. 5 is a configuration diagram of an exhaust gas treatment apparatus for an internal combustion engine according to another embodiment of the present invention.

FIG. 6 is a main flowchart of a processing method of the exhaust gas processing apparatus for the internal combustion engine.

FIG. 7 is a timing chart of regeneration control contents in the internal combustion engine exhaust gas treatment apparatus.

FIG. 8 is a flowchart of a regeneration execution process in the processing method of the exhaust gas processing apparatus for an internal combustion engine.

FIG. 9 is a flowchart of a regeneration execution process in the processing method of the exhaust gas processing apparatus for an internal combustion engine.

FIG. 10 is a flowchart of a regeneration execution process in the processing method of the exhaust gas processing apparatus for an internal combustion engine.

FIG. 11 is a configuration diagram of a conventional filter regeneration device for an internal combustion engine.

DESCRIPTION OF SYMBOLS 13 Exhaust pipe 14 Internal combustion engine 15 Heating space 16 Filter 17 Microwave generation means 26 Gas supply means 27 First valve 28 Second valve 29 Branch pipe 30 Microwave detection means 33 Control means 34 Alternator (internal combustion) 35 linked to the operation of the engine) 35 temperature detection means 42 notification means 43 regeneration execution command 46-50 collection amount display means 53 identification means for permitting regeneration

──────────────────────────────────────────────────の Continued on the front page (72) Nobuhiko Fujiwara, No. 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Takahiro Matsumoto 1006 Kadoma Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. (72) Inventor Akihiko Nakajima 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Hirotaka Kanazawa 2-1-1 Toyota-cho, Kariya-shi, Aichi Prefecture Inside Toyota Industries Corporation (56 References JP-A-4-301120 (JP, A) JP-A-5-231129 (JP, A) JP-A-6-101445 (JP, A) JP-A-7-83022 (JP, A) (58) Field surveyed (Int.Cl. ⁶ , DB name) F01N 3/02 301-341

Claims (13)

(57) [Claims] 1. A filter for collecting particulates contained in exhaust gas exhausted from an internal combustion engine, a heating space including the filter, and a micro-power feeding the heating space from the exhaust gas discharge side of the filter. Microwave generating means for generating a wave, gas supply means for supplying a gas containing oxygen from the exhaust gas discharge side of the filter into the heating space, and the exhaust gas between the internal combustion engine and the heating space is A first valve which is disposed on a branch pipe provided in a branch with respect to a flowing exhaust pipe and controls a flow rate of the gas flowing through the branch pipe; and a first valve between the heating space and the atmosphere. A second valve disposed on an exhaust pipe through which exhaust gas flows, for controlling a flow rate of the gas, microwave detection means for detecting a microwave amount at a predetermined position in the heating space, Minute A temperature detecting means disposed on an exhaust pipe between the exhaust pipe and a temperature of the exhaust gas flowing through the exhaust pipe or a temperature of the gas; a means for detecting an operation non-operation of the internal combustion engine; Control means for controlling the operation of the means, the gas supply means, the first valve and the second valve, respectively, and combusting and removing the particulates collected by the filter to regenerate the collection performance of the filter; The control means has a trapping amount determination map in which the integrated value of the operation time of the internal combustion engine and the microwave detection signal are defined as variables, and is obtained by periodically operating the microwave generation means. The detection amount of the microwave detection means and the integrated value of the operation time of the internal combustion engine at the time of detection of the signal are compared with the collection amount determination map to determine the current collection amount, Thus the information obtained is outputted to the notifying unit for an internal combustion engine exhaust gas treatment apparatus characterized. 2. The exhaust gas for an internal combustion engine according to claim 1, wherein the control means has a lower limit value and an upper limit value of a trapping amount that permits the trapping performance of the filter to be regenerated. Processing equipment. 3. The notifying means determines whether the current trapping amount determined by the control means with respect to a predetermined trapping amount range permitted to regenerate the trapping performance of the filter is within the permitted range or out of the permitted range. 2. The exhaust gas treatment apparatus for an internal combustion engine according to claim 1, further comprising: identification means. 4. The control means controls the first valve to be open and the second valve to be closed to execute the regeneration of the filter, and then operates the gas supply means to detect the detection signal of the temperature detection means. 2. The exhaust gas treatment device for an internal combustion engine according to claim 1, wherein the control state of each valve is determined based on a temporal change of the detection signal. 5. When the control means determines that the internal combustion engine has stopped operating, the control means starts counting the stop time of the internal combustion engine, and resets the count value when the internal combustion engine is operating during this counting period. 2. The exhaust gas processing device for an internal combustion engine according to claim 1, wherein when a filter regeneration execution command is received during the counting period, the process shifts to a regeneration execution process with the count value at that time. 6. The exhaust gas for an internal combustion engine according to claim 5, wherein the stop time counted by the control means has a predetermined upper limit value, and when the stop time exceeds the upper limit value, the stop time count value thereafter becomes this upper limit value. Gas treatment equipment. 7. A microwave generator, comprising: a microwave generator; and a filter based on information on a filter temperature determined from a count value of the stop time and a detection signal of the temperature detector and information on a trapping amount obtained during operation of the internal combustion engine. 2. The exhaust gas treatment device for an internal combustion engine according to claim 1, wherein the operation of each of the gas supply means is controlled. 8. A control means for receiving a microwave detection signal before and after the operation of the gas supply means after the operation of the microwave generation means is started after the operation of the microwave generation means is started, and controlling the time change of the detection signal. 8. The exhaust gas treatment device for an internal combustion engine according to claim 7, wherein the operation of the gas supply means is continued or stopped for a predetermined time based on the operation. 9. The control means captures a detection signal of the temperature detection means immediately before the end of the regeneration execution, and when the detection signal exceeds a predetermined value, supplies gas until the detection signal becomes equal to or less than the predetermined value. 8. The exhaust gas treatment device for an internal combustion engine according to claim 7, wherein the operation of the means is continued. 10. The control means controls the first valve to a closed state when the detection signal of the temperature detection means immediately before the end of the regeneration becomes equal to or less than a predetermined value. The exhaust gas processing device for an internal combustion engine according to claim 1, wherein it is determined based on the change that the first valve is in a closed state. 11. A method for collecting particulates contained in exhaust gas discharged from an internal combustion engine by a filter and removing the particulates from the filter, wherein the operating time of the internal combustion engine is integrated during the operation of the internal combustion engine. Microwaves are periodically supplied to the heating space containing the filter to detect the amount of microwaves at a predetermined position in the heating space, and the particulates collected by the filter based on the integrated operation time and the amount of microwaves. Determine the current trapped amount of, the step of reporting the current trapped amount, and counting the stop time of the internal combustion engine when the operation of the internal combustion engine is stopped,
When the internal combustion engine is operating or stopped, the processing unit is set to a regeneration execution state based on a regeneration execution command, and before the regeneration is performed, a gas containing oxygen is supplied to the filter to detect a temperature of the gas after flowing through the filter. Determining the current temperature of the filter based on the detected temperature and the count value of the stop time; and determining the control content of the regenerating apparatus based on the current temperature of the filter and the trapped amount obtained during operation of the internal combustion engine. Performing the step of dielectrically heating the particulates with microwaves based on the determined control content, supplying the gas containing oxygen to the filter after dielectrically heating the particulates, and burning the particulates by supplying the microwaves and gas. Stage to let
A method for treating an exhaust gas treatment apparatus for an internal combustion engine, comprising: a step of continuing the supply of the gas to the filter for a predetermined time after the supply of the microwave is stopped; 12. After the dielectric heating of the particulates, the quality of the start time of the gas supply is determined based on the temporal change value of the signal of the microwave amount detected before and after the start of the supply of the gas containing oxygen to the filter. The determination is made, and it is determined that the supply of the gas is continued or the supply is performed after stopping for a predetermined time.
A method for treating an exhaust gas treatment apparatus for an internal combustion engine according to claim 1. 13. A step of continuing gas supply to the filter for a predetermined time after stopping the supply of microwaves, wherein the time for stopping gas supply is determined by a temperature signal to be detected falling below a predetermined value. Item 12. A method for treating an exhaust gas treatment device for an internal combustion engine according to item 11.