JP6477121B2 - Carbon monoxide suppression device for vehicles - Google Patents

Description

  The present invention relates to a vehicle carbon monoxide suppression device.

  There is one that detects the concentration of carbon monoxide in the vehicle interior and ventilates the vehicle interior according to the detection result to reduce the concentration of carbon monoxide in the vehicle interior. For example, in Patent Document 1, ventilation is performed when the concentration of carbon monoxide in the passenger compartment is higher than the concentration of carbon monoxide outside the passenger compartment, and the concentration of carbon monoxide outside the passenger compartment is higher than the concentration of carbon monoxide in the passenger compartment. If it is too high, it is disclosed that it does not ventilate.

JP 2008-18740 A

In Patent Document 1, although the concentration of carbon monoxide in the passenger compartment is reduced, suppression of carbon monoxide generated from the vehicle is not considered.
An object of the present invention is to suppress an increase in the concentration of carbon monoxide in a passenger compartment by suppressing carbon monoxide generated from a vehicle.

  In order to achieve the above object, a carbon monoxide suppression device for a vehicle according to the present invention comprises an intake concentration detection means for detecting the concentration of carbon monoxide contained in intake air to an internal combustion engine of a vehicle, and a monoxide in a vehicle compartment The air-fuel ratio of the exhaust gas discharged from the internal combustion engine is made lean based on the vehicle interior concentration detection means for detecting the carbon concentration, the detection value of the intake air concentration detection means, and the detection value of the vehicle interior concentration detection means. Thus, it has a control means for controlling the operating state of the internal combustion engine.

  According to the present invention, on the basis of the detection value of the intake concentration detection means and the detection value of the vehicle interior concentration detection means, the air-fuel ratio of the exhaust gas discharged from the internal combustion engine is set to a lean state, and carbon monoxide in the exhaust gas By controlling the operating state of the internal combustion engine so as to be an operating region in which the concentration of the fuel is reduced, carbon monoxide generated from the vehicle is suppressed, so that an increase in the concentration of carbon monoxide in the vehicle interior can be suppressed. .

The top view which shows schematic structure of the vehicle to which this invention was applied. The block diagram which shows the structure of the carbon monoxide suppression apparatus for vehicles which concerns on this invention. The table which shows the relationship between the situation where the carbon monoxide concentration becomes high inside and outside the vehicle, and the assumed source of carbon monoxide. The flowchart which shows one control form of the control content of the carbon monoxide suppression apparatus for vehicles. 5 is a flowchart connected to a terminal A in FIG. The flowchart which shows another control form of the control content of the carbon monoxide suppression apparatus for vehicles. 7 is a flowchart connected to terminal B of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the embodiment, the same member or a member having the same function is denoted by the same reference numeral, and redundant description is appropriately omitted. In the drawings, the structural requirements may be partially omitted for ease of viewing.

In FIG. 1, a vehicle 1 is equipped with an engine 2 that is an internal combustion engine. In the present embodiment, the vehicle 1 will be described as a 5-door wagon type, and the engine 2 will be described as a 4-cylinder gasoline engine.
An intake manifold 3 is mounted on the intake side of the engine 2. One end of an intake pipe 4 having both ends opened is connected to the intake manifold 3. The intake pipe 4 draws outside air as intake air A from the other end side and introduces it into each cylinder of the engine 2 via the intake manifold 3. An air cleaner 5 having a filter 6 therein is attached to the intake pipe 4. The intake manifold 3 is provided with a blow-by gas recirculation passage 21 through which blow-by gas generated in the engine 2 is recirculated. On the intake side of the engine 2, intake concentration detection means 26 that detects the concentration of carbon monoxide contained in the intake air A is provided.
In the intake manifold 3, the blow-by gas is recirculated and mixed with the intake air A to form reducing intake air. Therefore, even if the intake concentration detection means 26 is attached to the intake manifold 3, accurate carbon monoxide concentration detection is possible. difficult. As for the arrangement of the intake concentration detection means 26, it is desirable to install it as upstream as possible on the intake side. Therefore, it becomes severe in terms of false detection and durability. For this reason, in the present embodiment, the intake concentration detection means 26 is disposed downstream of the filter 6 in the air cleaner 5 in the inflow direction of the intake air A (between the filter 6 and the intake manifold 3).
The intake manifold 3 is provided with a fuel injection nozzle 20 that injects and mixes fuel into the intake air A. In the present embodiment, the fuel injection method is a multi-point injection method that includes one fuel injection nozzle 20 for each cylinder. The fuel injection method may be a single point injection method in which at least one fuel injection nozzle 20 is provided in the intake manifold 3 or the intake pipe 4.

  An exhaust manifold 7 is mounted on the exhaust side of the engine 2. An exhaust pipe 8 extending to the rear of the vehicle is connected to the exhaust manifold 7. The exhaust pipe 8 is equipped with a catalyst device 9 and a muffler 10 that purify the exhaust gas G exhausted from the engine 2 by oxidizing or reducing it. In the present embodiment, a known three-way catalyst is used for the catalyst device 9.

The left and right front doors positioned in the vehicle width direction of the vehicle 1 are provided with electric front side window devices 12L and 12R. The left and right rear doors positioned in the vehicle width direction of the vehicle 1 are provided with electric rear side window devices 13L and 13R.
The front side window device 12L includes a side window glass 120L (hereinafter referred to as “window glass 120L”), and a window regulator device 121L that moves the window glass 120L up and down in the vehicle vertical direction (the vertical direction in FIG. 1). . The front side window device 12R includes a side window glass 120R (hereinafter referred to as “window glass 120R”) and a window regulator device 121R that raises and lowers the window glass 120R in the vehicle vertical direction.
The rear side window device 13L includes a side window glass 130L (hereinafter referred to as “window glass 130L”) and a window regulator device 131L that raises and lowers the window glass 130L in the vehicle vertical direction. The rear side window device 13R includes a side window glass 130R (hereinafter referred to as “window glass 130R”) and a window regulator device 131R that moves the window glass 130R up and down in the vehicle vertical direction.
Each side window device is opened and closed by raising and lowering each window glass by operating each window regulator device. In the vehicle 1, when each window glass is in an open state, the vehicle interior 11 and the vehicle exterior 15 are in communication with each other. FIG. 1 shows an open state in which only the window glass 120R is opened.

An electric sunroof device 14 is provided on the roof portion of the vehicle 1. The sunroof device 14 includes a sunroof glass 141 and a sunroof driving device 142 that slides the sunroof glass 141 in the vehicle front-rear direction (up and down direction in FIG. 1) or pops up in the vehicle up-down direction. The sunroof glass 141 is opened and closed when the sunroof driving device 142 is operated. In the vehicle 1, the vehicle interior 11 and the vehicle exterior 15 are in communication with each other when the sunroof glass 141 is open.
The front side window devices 12L and 12R, the rear side window devices 13L and 13R, and the sunroof device 14 function as ventilation means for communicating the vehicle interior 11 and the vehicle exterior 15 for ventilation.

  The vehicle interior 11 is provided with vehicle interior concentration detection means 27, warning means 28, and control means 30 for detecting the concentration of carbon monoxide in the vehicle interior. The vehicle interior concentration detection means 27 is disposed, for example, near the driver's seat or near the air conditioner outlet. The warning means 28 notifies various warning information. In the present embodiment, the warning means 28 is a unit in which various information display functions, sound generation functions, lighting and blinking functions are combined into one unit. As the warning means 28, it is preferable to provide at least one of the individual functions, and preferably a plurality of warning means so that warnings can be made in stages according to the importance of the warning contents.

In this embodiment, the side window devices 12L and 12R, which are ventilation means, the rear side window devices 13L and 13R, the sunroof device 14, each fuel injection nozzle 20, the intake concentration detection means 26, the vehicle interior concentration detection means 27, and the warning means 28. The control means 30 constitutes the vehicle carbon monoxide suppression device 100.
Next, the configuration of the control system of the vehicle carbon monoxide suppression device 100 will be described with reference to FIG. As shown in FIG. 2, the control means 30 is composed of a computer including a CPU (Central Processing Unit) 30A, a RAM (Random Access Memory) 30B, and a ROM (Read Only Memory) 30C.
On the input side of the control means 30, a rotation speed detection means 25, an intake air concentration detection means 26, and a vehicle interior concentration detection means 27 are connected via a signal line. The rotation speed detection means 25 detects the rotation speed of the engine 2 and outputs rotation information. The intake concentration detection means 26 detects the concentration of carbon monoxide contained in the intake air A and outputs it as a detection value CA (hereinafter also referred to as “intake side detection value CA”). The vehicle interior concentration detection means 27 detects the carbon monoxide concentration in the vehicle interior 11 and outputs it as a detection value CB (hereinafter also referred to as “indoor detection value CB”).

On the output side of the control means 30, a drive part 21 of each fuel injection nozzle 20, a drive part 23 of each window regulator apparatus, a drive part 24 of the sunroof apparatus 14, and a warning means 28 are connected via signal lines. Since the drive unit 21 of each fuel injection nozzle has the same configuration, it is represented as one reference numeral 21 here. Since all four drive units 23 of each window regulator device have the same configuration, they are represented by one reference numeral 23 here.
In the present embodiment, the control means 30 controls the operation of each fuel injection nozzle drive unit 21, each window regulator device drive unit 23, and the drive unit 24 of the sunroof device 14 as well as operation control of the engine 2.

(First embodiment)
Next, the content of the carbon monoxide suppression process by the vehicle carbon monoxide suppression apparatus 100 will be described with reference to the flowcharts shown in FIGS. 4 and 5. This carbon monoxide suppression process is performed at predetermined intervals by the control means 30. The ROM 30C of the control means 30 includes a reference value C1 used when determining whether the carbon monoxide concentration is high or low, a threshold C2 used when determining the risk of the carbon monoxide concentration, and carbon monoxide suppression processing. A program to be executed is stored in advance. The reference value C1 and the threshold value C2 are fixed values here, but may be changed by rewriting them arbitrarily from the outside by connecting a connector or the like to the control means 30.
In the present embodiment, the threshold value is a concentration that may affect the human body. The relationship between the reference value C1 and the threshold C2 is such that the reference value C1 <the threshold C2. In this embodiment, the carbon monoxide concentration in the intake air A is used as a parameter for increasing the carbon monoxide concentration outside the vehicle 15, but the parameter in the intake air A is used as the parameter for the carbon monoxide concentration outside the vehicle 15. It is not limited to the carbon monoxide concentration. In the present embodiment, the reference value C1 is density information.

FIG. 3 is a table showing the relationship between the situation where the carbon monoxide concentration is high inside and outside the vehicle 1 and the assumed carbon monoxide generation source. In FIG. 3, when the detected concentration by the intake concentration detection means 26 increases (only on the intake side) and when the detected concentration by the indoor concentration detection means 27 increases (only on the vehicle interior side) when the engine is operating and when the engine is stopped. The cases where the detected concentrations of both increase (both cases) are shown separately.
When the detected concentration by the intake concentration detecting means 26 increases when the engine is operating, the carbon monoxide generation source includes the engine 2 (exhaust gas), an external combustion device (use of a stove or a fire in the vicinity of the vehicle), a driving battery. Smoke is mentioned.
As the carbon monoxide generation source when the detected concentration by the indoor concentration detection means 27 increases when the engine is operating, the engine 2 (exhaust gas inflow) and the vehicle interior combustion device (use of gas stove or combustion system heater) are used. Can be mentioned.
Examples of the carbon monoxide generation source in the case where the detected concentration by the intake concentration detecting means 26 increases when the engine is stopped include combustion equipment outside the vehicle (use of a stove and a fire in the vicinity of the vehicle), and driving battery smoke.
As the carbon monoxide generation source when the detected concentration by the indoor concentration detecting means 27 increases when the engine is stopped, a vehicle interior combustion device (use of a gas stove or use of a combustion system heater) can be mentioned.

In step ST1 of FIG. 4, the control means 30 determines whether or not the engine 2 is operating based on the presence or absence of rotation information from the rotation detection means 25. If the engine speed is detected by the rotation detector 25 and there is rotation information, it is determined that the engine is operating and the process proceeds to step ST2.
In step ST2, the control means 30 determines whether or not the carbon monoxide concentration in the intake air A is high by comparing the intake side detection value CA from the intake concentration detection means 26 with a preset reference value C1. To do. If the intake side detection value CA exceeds the reference value C1, the control means 30 proceeds to step ST3.
In step ST3, the control means 30 determines whether or not the carbon monoxide concentration in the passenger compartment 11 is high by comparing the indoor side detection value CB from the indoor concentration detection means 27 with the reference value C1. If the indoor side detection value CB does not exceed the reference value C1, the control means 30 proceeds to step ST4. When the indoor side detection value CB exceeds the reference value C1, the control means 30 proceeds to step ST8, operates the warning means 28 to perform warning processing, and ends this control loop. Wait until the loop. The warning in this warning process is given to give priority to the evacuation of the occupant from the passenger compartment 11, and the warning means 28 performs voice warning and flashing of light, and sleeps in the passenger compartment 11. It is a level that can fully inform the passengers of the warning.

In step ST4, the control means 30 determines whether or not the indoor side detection value CB exceeds the threshold value C2. When the indoor side detection value CB is less than the threshold value C2, the control unit 30 proceeds to step ST5. The control means 30 operates the warning means 28 and executes warning processing on the assumption that the carbon monoxide concentration in the passenger compartment 11 has increased in step ST5. Here, for example, since the carbon monoxide concentration outside the vehicle has increased for the passenger, a warning message prompting the movement of the vehicle 1 from the current location is displayed, and the process proceeds to step ST6.
In step ST6, the control means 30 switches the operating state of the engine 2 to an operation region where the carbon monoxide concentration in the exhaust gas is reduced. Specifically, the fuel injection amount is reduced to reduce the injection amount by operating the fuel injection nozzle drive unit 21 so that the operating region of the engine 2 is CO lean combustion in which the carbon monoxide in the exhaust gas G is reduced. Further, the carbon monoxide contained in the intake air A is also reduced by combustion in the combustion stroke of the engine 2. In this embodiment, since the three-way catalyst is used in the gasoline engine, the fuel injection amount is controlled so that the engine 2 operates in the operation region where the fuel is leaner than the stoichiometric region that is the stoichiometric air-fuel ratio, and the exhaust gas is controlled. The air-fuel ratio of the exhaust gas G is set to a lean state so that the air-fuel ratio of the exhaust gas G is preferably set to 18 to 20 so that the air-fuel ratio becomes a predetermined value leaner than the stoichiometric air-fuel ratio. Of course, it is desirable to secure a fuel injection amount that can maintain idling of the engine 2 even in an operating region where the fuel is lean (lean combustion). The determination of the operation region may be performed by a known method such as rotation information of the engine rotation speed by the rotation speed detection means 25 and intake air amount information from an airflow sensor, an accelerator opening sensor, or the like. After the end of step ST6, the control means 30 ends this control loop and enters a standby state until the next loop.

  When the indoor side detection value CB exceeds the threshold value C2 in step ST4, the control means 30 proceeds to step ST7 and executes an engine stop process for stopping the operation of the engine 2. In the engine stop process, the fuel injection nozzle drive unit 21 is controlled to stop the fuel injection by the fuel injection nozzle 20. After stopping the engine, the control means 30 proceeds to step ST8 and executes warning processing by the warning means 28.

  If the intake side detection value CA does not exceed the reference value C1 in step ST2, the control means 30 proceeds to step ST9. In step ST9, the control means 30 determines whether or not the indoor detection value CB is higher than the reference value C1, and if the indoor detection value CB is not higher than the reference value C1, the carbon monoxide concentration is a problem. Assuming that the control loop is not present, the control loop is terminated and the process waits until the next loop. When the indoor side detection value CB is higher than the reference value C1 in step ST9, the control means 30 proceeds to step ST10 and operates the ventilation means, assuming that the carbon monoxide concentration in the passenger compartment 11 has increased. Perform ventilation processing. In the ventilation process, at least one drive unit of the drive unit 23 of each window regulator device or the drive unit 24 of the sunroof device 14 is driven to open any of the window glass 120L, 120R, 130L, 130R or the sunroof glass 141, The outside air is released to ventilate the air in the passenger compartment 11. The control means 30 finishes this control after the end of step ST10, and is in a standby state until the next loop.

On the other hand, if the engine speed is not detected and there is no rotation information in step ST1, the control means 30 determines that the engine is stopped and proceeds to step ST11 shown in FIG. In step ST11, the control unit 30 determines whether or not the indoor detection value CB is higher than the reference value C1, and if the indoor detection value CB is not higher than the reference value C1, the carbon monoxide concentration is Assuming that there is no problem, the control loop is terminated and the process waits until the next loop.
When the indoor side detection value CB is higher than the reference value C1 in step ST11, the control means 30 assumes that the carbon monoxide concentration in the vehicle interior 11 has increased, although the engine is stopped, step ST12. Proceed to In step ST12, the control means 30 determines whether or not the carbon monoxide concentration in the passenger compartment 11 is within an allowable range by comparing the indoor side detection value CB and the threshold value C2. Then, when the indoor side detection value CB does not exceed the threshold value C2, the control means 30 proceeds to step ST13 and performs a ventilation process for operating the ventilation means. In this ventilation process, as in step ST10, at least one drive unit of the drive unit 23 of each window regulator device or the drive unit 24 of the sunroof device 14 is driven and any one of the wind glasses 120L, 120R, 130L, 130R is driven. Alternatively, the sunroof glass 141 is opened and the outside air is released to ventilate the air in the vehicle interior 11.

  If the indoor side detection value CB exceeds the threshold value C2 in step ST12, the control means 30 proceeds to step ST14 and operates the warning means 28 to perform warning processing. In the warning process here, the carbon monoxide concentration in the passenger compartment 11 exceeds the threshold C2 even when the engine is stopped. The reason why the interior combustion equipment (gas stove or combustion system heater) is used in the passenger compartment 11 This is done to give the highest priority to the evacuation of the occupant from the passenger compartment 11. Specifically, it is a level at which a warning by voice by the warning means 28 and blinking of light are executed to sufficiently inform the passenger in the passenger compartment 11 of the warning content. When the warning process is finished, the control means 30 finishes the control and is in a standby state until the next loop.

That is, in this embodiment, when only the carbon monoxide concentration in the passenger compartment 11 increases without increasing the carbon monoxide concentration in the intake air A even when the engine is stopped or operating by the control means 30, each window regulator device or The ventilation means such as the sunroof device 14 is operated.
In the present embodiment, the control means 30 is in the vehicle interior when the engine is operating and only the carbon monoxide concentration in the intake air A of the engine 2 increases and the carbon monoxide concentration in the vehicle interior 11 does not increase. 11 is activated to issue a warning to the occupant, and a message prompting the engine 2 to stop or move from the current location is issued.
In the present embodiment, when the engine is operating by the control means 30 and both the carbon monoxide concentration in the intake air A of the engine 2 and the carbon monoxide concentration in the passenger compartment 11 are increased, the warning means 28 issues a warning. First, the amount of fuel injected from the fuel injection nozzle 20 is controlled, and, for example, transition from an optimal fuel consumption point to an operating state (operation region) in which the generation of carbon monoxide is small, and the exhaust gas G (outside the vehicle 15) is changed. Prevents the increase in carbon oxide concentration. Further, when the carbon monoxide concentration outside the vehicle 15 increases, the control means 30 forcibly stops the engine 2.

With this configuration, according to the present embodiment, when the detection value CA of the intake concentration detection means 26 exceeds the reference value C1 and the detection value CB of the vehicle interior concentration detection means 27 is less than the threshold value C2, the exhaust gas is exhausted. By controlling the engine 2 so that the carbon monoxide concentration in the gas G is reduced and the air-fuel ratio of the exhaust gas is in a lean state, carbon monoxide generated from the vehicle 1 can be suppressed. For this reason, the increase in the carbon monoxide concentration in the passenger compartment 11 due to the carbon monoxide outside the vehicle 15 can be suppressed.
In the present embodiment, the control means 30 stops the operation of the engine 2 when the detection value CB of the vehicle interior concentration detection means 27 is greater than or equal to the threshold value C2. An increase in the carbon monoxide concentration can be suppressed.
In the present embodiment, since the intake concentration detection means 26 is disposed downstream of the filter 6 in the air cleaner 5 in the inflow direction of the intake air A, dirt due to dust or the like is difficult to adhere, and the carbon monoxide concentration This leads to reduced detection accuracy and false detection.
In the present embodiment, the control means 30 issues warning information when the detected values CA and CB of the intake concentration detecting means 26 and the vehicle interior concentration detecting means 27 exceed the reference value C1 during engine operation. Since the warning means 28 is operated as described above, an increase in the carbon monoxide concentration in the passenger compartment 11 can be notified to the passenger.
In the present embodiment, when the detection value CB of the vehicle interior concentration detection unit 27 exceeds the reference value C1, the control unit 30 operates the ventilation unit that ventilates the air in the vehicle interior 11 to ventilate the vehicle interior 11. Thus, the outside air can be introduced into the vehicle interior 11 and the carbon monoxide concentration in the vehicle interior 11 can be reduced.
In the above embodiment, in the carbon monoxide suppression process, the concentration information is set as the reference value C1, and the magnitudes of the detection values of the intake concentration detection means 26 and the vehicle interior concentration detection means 27 are determined. It is not limited to.

(Second Embodiment)
As shown in FIGS. 6 and 7, the vehicle carbon monoxide suppression apparatus 100 according to the present embodiment uses the concentration increase rate of the detected values of the intake concentration detection means 26 and the vehicle interior concentration detection means 27 as a predetermined concentration increase rate. The carbon monoxide suppression process is performed by making a determination based on ΔC. This embodiment is executed by the control means 30 shown in FIG. In the present embodiment, the concentration increase rate of the detection value of the intake concentration detection means 26 is defined as an intake side concentration increase rate ΔCA, and the concentration increase rate of the detection value of the vehicle interior concentration detection means 27 is defined as an indoor side concentration increase rate ΔCB. The ROM 30C of the control means 30 includes a formula for calculating a predetermined concentration increase rate ΔC, an intake side concentration increase rate ΔCA, and an indoor side concentration increase rate ΔCB, which are determination criteria, and a program for performing carbon monoxide suppression processing. Stored in advance.

  Hereinafter, the carbon monoxide suppression process will be described with reference to the flowcharts shown in FIGS. 6 and 7. 6 is the same as that in steps ST5 to ST10 described in FIG. 3, and the process in step ST32 in FIG. 7 is described in FIG. Since it is the same as the processing content of step ST13, the content will be briefly described as appropriate.

In step ST21 of FIG. 6, the control means 30 calculates the intake side concentration increase rate ΔCA and the indoor side concentration increase rate ΔCB. As a calculation method, the detection values (previous values CA ′, CB ′) from the previous intake concentration detection means 26 and the vehicle interior concentration detection means 27 are stored in the ROM 30C, and the previous values CA ′, CB ′ and the current intake concentration are stored. The difference between the detection values CA and CB from the detection means 26 and the vehicle interior concentration detection means 27 is defined as an intake side concentration increase rate ΔCA and an indoor side concentration increase rate ΔCB. If there is no previous value, the detected values CA and CB from the current intake concentration detection means 26 and the vehicle interior concentration detection means 27 are regarded as the intake side concentration increase rate ΔCA and the indoor side concentration increase rate ΔCB.
In step ST22, the control means 30 determines whether or not the engine 2 is operating based on the presence or absence of the rotation information from the rotation detection means 25. If the engine speed is detected by the rotation detector 25 and there is rotation information, it is determined that the engine is operating and the process proceeds to step ST23.
In step ST23, the control means 30 determines whether or not the carbon monoxide concentration increase rate in the intake air A is high by comparing the intake side concentration increase rate ΔCA with a preset predetermined concentration increase rate ΔC. If the intake side concentration increase rate ΔCA exceeds the predetermined concentration increase rate ΔC, the control means 30 proceeds to step ST24.

In step ST24, the control means 30 determines whether or not the carbon monoxide concentration in the passenger compartment 11 is high by comparing the indoor-side concentration increase rate ΔCB with a preset predetermined concentration increase rate ΔC. When the indoor-side concentration increase rate ΔCB does not exceed the predetermined concentration increase rate ΔC, the control unit 30 proceeds to step ST25 and operates the warning unit 28 on the assumption that the carbon monoxide concentration in the vehicle interior 11 has increased. The warning process is executed, and the process proceeds to step ST26.
In step ST26, the control means 30 switches the operating state of the engine 2 to an operating region in which the carbon monoxide concentration in the exhaust gas G decreases and the air-fuel ratio of the exhaust gas G to be discharged becomes lean. Specifically, the fuel injection amount is reduced to reduce the injection amount by operating the fuel injection nozzle drive unit 21 so that the operating region of the engine 2 is CO lean combustion in which the carbon monoxide in the exhaust gas G is reduced. After the end of step ST26, the control means 30 ends this control loop and enters a standby state until the next loop.

If the indoor concentration increase rate ΔCB exceeds the predetermined concentration increase rate ΔC in step ST24, the control means 30 proceeds to step ST27, executes an engine stop process for stopping the operation of the engine 2, and proceeds to step ST28. move on. In step ST28, the control unit 30 operates the warning unit 28 to perform warning processing, ends this control loop, and enters a standby state until the next loop.
When the intake side concentration increase rate ΔCA does not exceed the predetermined concentration increase rate ΔC in step ST23, the control means 30 proceeds to step ST29, and determines whether or not the carbon monoxide concentration in the vehicle interior 11 is high. The determination is made by comparing the increase rate ΔCB and the predetermined concentration increase rate ΔC. When the indoor-side concentration increase rate ΔCB exceeds the predetermined concentration increase rate ΔC, the control means 30 proceeds to step ST30 assuming that the carbon monoxide concentration in the vehicle interior 11 has increased, and operates the ventilation means. Perform ventilation processing. When the indoor-side concentration increase rate ΔCB does not exceed the predetermined concentration increase rate ΔC, the control means 30 determines that the carbon monoxide concentration is not a problem, and terminates this control loop and waits until the next loop. Become.

On the other hand, in step ST22, when the engine speed is not detected and there is no rotation information, the control means 30 determines that the engine is stopped and proceeds to step S31 shown in FIG. In step ST31, the control means 30 determines whether or not the carbon monoxide concentration in the passenger compartment 11 is high by comparing the indoor-side concentration increase rate ΔCB with a predetermined concentration increase rate ΔC. When the indoor-side concentration increase rate ΔCB exceeds the predetermined concentration increase rate ΔC, the control means 30 proceeds to step ST32 on the assumption that the carbon monoxide concentration in the vehicle interior 11 has increased, and operates the ventilation means. The ventilation process to be executed is executed, this control loop is terminated, and a standby state is entered until the next loop.
When the indoor-side concentration increase rate ΔCB does not exceed the predetermined concentration increase rate ΔC, the control means 30 determines that the carbon monoxide concentration in the vehicle interior 11 has no problem, and terminates this control loop, and the next loop It will be in a standby state.

That is, in this embodiment, when the increase rate of the carbon monoxide concentration in the passenger compartment 11 exceeds the predetermined concentration increase rate without increasing the carbon monoxide concentration of the intake air A even when the engine is stopped or operating by the control means 30, The ventilation means such as each window regulator device and sunroof device 14 are operated. For this reason, outside air can be introduced into the vehicle interior 11 and the carbon monoxide concentration in the vehicle interior 11 can be reduced.
In this embodiment, the control means 30 is operating the engine, and only the carbon monoxide concentration increase rate of the intake air A of the engine 2 increases, and the carbon monoxide concentration increase rate of the passenger compartment 11 does not increase. In such a case, the warning means 28 provided in the passenger compartment 11 is activated to issue a warning to the occupant, and a message prompting the engine 2 to stop or move from the current location is issued. For this reason, the passenger can be notified of an increase in the concentration of carbon monoxide in the passenger compartment 11.
In the present embodiment, when the engine is being operated by the control means 30 and both the concentration increase rate of carbon monoxide in the intake air A of the engine 2 and the concentration increase rate of carbon monoxide in the passenger compartment 11 are increased, a warning is given. A warning is issued by means 28 and the fuel injection amount from the fuel injection nozzle 20 is controlled. For example, a transition from an optimal fuel consumption point to an operation state in which the generation of carbon monoxide is small, and the air-fuel ratio of the exhaust gas G to be discharged is set to a lean state, so that the carbon monoxide of the exhaust gas G (outside the vehicle 15). Prevent increase in concentration. If it further rises, the control means 30 forcibly stops the engine 2. For this reason, carbon monoxide generated from the vehicle 1 can be suppressed, and an increase in the carbon monoxide concentration in the passenger compartment 11 due to the carbon monoxide outside the vehicle 15 can be suppressed.
Also in this embodiment, since the intake concentration detection means 26 is disposed downstream of the filter 6 in the air cleaner 5 in the inflow direction of the intake air A, dirt due to dust or the like is less likely to adhere. This leads to variations in the detection accuracy of the carbon concentration increase rate and reduction in false detection.

As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to this specific embodiment, Unless it is specifically limited by the above-mentioned description, this invention described in the claim is described. Various modifications and changes are possible within the scope of the gist of the invention.
For example, the control unit 30 may include a vehicle speed detection unit that determines the traveling state of the vehicle 1. In this case, the preset reference value V1 and the current vehicle speed V are set between step ST1 and step ST2 in the first embodiment and between step ST22 and step ST23 in the second embodiment. A processing step is provided for comparing the two. If the vehicle speed V does not exceed the reference value V1, the process proceeds to step ST2 (step ST23). If the vehicle speed V exceeds the reference value V1, the vehicle is traveling at a predetermined speed. For example, the vehicle may be traveling in an area with a high carbon monoxide concentration such as in a tunnel. It is considered better and will not proceed to the following steps.
Further, the vehicle 1 to which the present invention is applied is not limited to the 5-door wagon type. In the present embodiment, the vehicle 1 equipped with the sunroof device 14 is illustrated, but a vehicle not equipped with the sunroof device 14 may be used. In this case, at least one of the front side window devices 12L and 12R and the rear side window devices 13L and 13R may be used as ventilation means for ventilation in the vehicle interior. The engine 2 is not limited to a four-cylinder gasoline engine, and the number of cylinders may be increased or decreased, and may be a diesel engine. Of course, the vehicle 1 may be any vehicle provided with an internal combustion engine, and may be a hybrid type vehicle 1 provided with an internal combustion engine and an electric motor.
The effects described in the embodiments of the present invention are only the most preferable effects resulting from the present invention, and the effects of the present invention are limited to those described in the embodiments of the present invention. is not.

  DESCRIPTION OF SYMBOLS 1 ... Vehicle, 2 ... Internal combustion engine, 5 ... Air cleaner, 6 ... Filter, 11 ... Vehicle interior, 12 (L, R) ... Ventilation means (front side window apparatus) , 13 (L, R) ... Ventilation means (rear side window device), 15 ... Outside the vehicle, 24 ... Ventilation means (sunroof device) 26 ... Intake concentration detection means, 27 ... Vehicle interior Concentration detection means, 28 ... warning means, 30 ... control means, 100 ... carbon monoxide suppression device for vehicle, A ... intake air, CA ... detected value of intake concentration detection means, ΔCA ... Increase rate of detection value of intake air concentration detection means, CB ... Detection value of vehicle interior concentration detection means, ΔCB ... Increase rate of detection value of in-vehicle concentration detection means, ΔC ... Predetermined increase rate , C1 ... reference value, C2 ... threshold, G ... exhaust gas

Claims (9)

Intake air concentration detection means for detecting the concentration of carbon monoxide contained in the intake air to the internal combustion engine of the vehicle;
A vehicle interior concentration detecting means for detecting the concentration of carbon monoxide in the vehicle interior;
Based on the detection value of the intake air concentration detection means and the detection value of the vehicle interior concentration detection means, the operation state of the internal combustion engine is controlled so that the air-fuel ratio of the exhaust gas discharged from the internal combustion engine becomes lean. A carbon monoxide suppression device for a vehicle, comprising:   The control means sets the air-fuel ratio of the exhaust gas discharged from the internal combustion engine when the detection value of the intake concentration detection means exceeds a reference value and the detection value of the vehicle interior concentration detection means is less than a threshold value. 2. The vehicle carbon monoxide suppression device according to claim 1, wherein an operation state of the internal combustion engine is controlled so as to be in a lean state.   The vehicle control apparatus according to claim 1, wherein the control unit controls the operation of the internal combustion engine to be stopped when a detection value of the vehicle interior concentration detection unit is equal to or greater than a threshold value. Carbon oxide suppression device.   The control means controls the operating state of the internal combustion engine so that the air-fuel ratio of the exhaust gas becomes lean when the concentration increase rate of the detected value of the intake concentration detection means exceeds a predetermined concentration increase rate. Alternatively, the vehicle carbon monoxide suppression device according to claim 1, wherein the control is performed to stop the operation of the internal combustion engine. A warning means for issuing warning information;
Wherein, during operation of the internal combustion engine, at least one of when the detection value exceeds the reference value, the warning means to emit pre Symbol warning information of the passenger compartment concentration detecting means and the intake density detection means The carbon monoxide suppression device for a vehicle according to claim 2 , wherein the control device is controlled to operate. A ventilation means for ventilating the air in the vehicle interior;
Wherein, when the detection value of the vehicle interior concentration detector exceeds the reference value, according to claim 2 which operates the pre Symbol ventilator and controls to ventilate the passenger compartment and Carbon monoxide suppression device for vehicles. A warning means for issuing warning information;
The control means controls the warning means to issue the warning information when the concentration increase rate of at least one of the intake concentration detection means and the vehicle interior concentration detection means exceeds the predetermined concentration increase rate. vehicle carbon monoxide suppression device according to claim 4, characterized that you control to operate. A ventilation means for ventilating the air in the vehicle interior;
The control means controls to ventilate the vehicle interior by operating the ventilation means when the concentration increase rate of the detection value of the vehicle interior concentration detection means exceeds the predetermined concentration increase rate. The carbon monoxide suppression device for a vehicle according to claim 4. The intake concentration detecting means is arranged to take in intake air to the intake side of the internal combustion engine from the outside of the vehicle, and is disposed downstream of the filter in the inflow direction of the intake air in an air cleaner provided with a filter. The carbon monoxide suppression device for a vehicle according to any one of claims 1 to 8.

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