JP6455271B2 - 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, no ventilation is disclosed.

JP 2008-18740 A

In Patent Document 1, although the concentration of carbon monoxide in the passenger compartment is reduced, no consideration is given to the suppression of carbon monoxide generated from the vehicle and the situation around the vehicle.
An object of the present invention is to suppress carbon monoxide generated from a vehicle in accordance with a situation around the vehicle.

  In order to achieve the above object, a carbon monoxide suppression device for a vehicle according to the present invention comprises a concentration detection means for detecting the concentration of carbon monoxide in a vehicle interior or exterior of a vehicle in which an internal combustion engine is mounted, and the surroundings of the vehicle. The internal combustion engine so that the air-fuel ratio of the exhaust gas discharged from the internal combustion engine is in a lean state based on the ambient condition detection means for detecting the situation of the engine, the detection value of the concentration detection means and the detection value of the ambient condition detection means It has the control means which controls the driving | operation state of this.

  According to the present invention, the detection value of the concentration detection means for detecting the concentration of carbon monoxide in the vehicle interior or exterior of the vehicle on which the internal combustion engine is mounted, and the detection of the ambient condition detection means for detecting the situation around the vehicle The operating state of the internal combustion engine is controlled so that the concentration of carbon monoxide in the exhaust gas is reduced by setting the air-fuel ratio of the exhaust gas discharged from the internal combustion engine to a lean state based on the value. As compared with the case where the concentration detection means is provided, the calculation process is unnecessary, the situation around the vehicle can be accurately determined, and the increase in the carbon monoxide concentration in the vehicle compartment can be suppressed.

The top view which shows schematic structure of the vehicle to which this invention was applied, and a parking place. The side view which shows schematic structure of the vehicle to which this invention was applied, and a parking place. The block diagram which shows the structure of the carbon monoxide suppression apparatus for vehicles which concerns on this invention. The flowchart which shows one control form of the control content of the carbon monoxide suppression apparatus for vehicles. The flowchart which shows one control form of the enclosed space determination process by the carbon monoxide suppression apparatus for vehicles. The flowchart which shows another control form of the enclosed space determination process by the carbon monoxide suppression apparatus for vehicles. The flowchart which shows another control form of the enclosed space determination process by the carbon monoxide suppression apparatus for vehicles.

  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 manifold 3 draws outside air as intake air A from the other end of the intake pipe 4 and introduces it into each cylinder of the engine 2. An air cleaner 5 having a filter 6 therein is attached to the intake pipe 4.
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 for detecting the concentration of carbon monoxide in the vehicle interior, warning means 28 and control means 30 as concentration detection means. 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 that combines various information display functions, sound generation functions, and lighting and blinking functions. 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.

As shown in FIGS. 1 and 2, the arrow F indicates the front of the vehicle 1, the arrow R indicates the rear of the vehicle 1, and the arrow W indicates the width direction of the vehicle 1, that is, the left and right sides. An arrow Y shown in FIG. 2 indicates the upper side of the vehicle 1. In this embodiment, the vehicle is located in the garage indicated by reference numeral 40. The garage 40 is provided with an openable door 41 at the front. The garage 40 is surrounded by wall surfaces 42, 43, 44, and 45, and a space 46 is formed inside. When the vehicle 1 is in the garage 40, the space 46 is outside the vehicle 15. This space 46 is assumed to be a place regarded as a sealed space when the door 41 is closed.
In the present embodiment, the sealed space is a space having a problem when the exhaust gas G is filled, and does not indicate only a physically completely sealed space. For example, in addition to the illustrated garage 40, a space such as an underground parking lot such as a department store is also included. Spaces such as underground parking lots are equipped with ventilation systems, but if the number of parked vehicles is large, the total amount of exhaust gas G discharged from the vehicle 1 is large, and as a result, carbon monoxide is also discharged. Become more. For this reason, when the vehicle 1 is stopped or parked in such a space and the occupant is in the vehicle 1, it is desirable to suppress generation and emission of carbon monoxide as much as possible.

  Therefore, in the present embodiment, there is an ambient condition detection unit for detecting the ambient condition of the vehicle 1, and the engine 2 is based on the detection value of the vehicle interior concentration detection unit 27 and the detection value of the ambient condition detection unit. The vehicle 1 is equipped with a vehicle carbon monoxide suppression device 100 that controls the operating state of the engine 2 so that the air-fuel ratio of the exhaust gas G to be discharged becomes lean. For this reason, in this embodiment, a calculation process is unnecessary compared with the case where a plurality of concentration detection means are provided, the situation around the vehicle 1 can be accurately determined, and an increase in the concentration of carbon monoxide in the passenger compartment 1 is suppressed. can do.

Hereinafter, the function and configuration of the ambient condition detection means will be described.
The surrounding state detection means detects obstacles in five directions, ie, front F, rear R, left and right side Ws and upper Y of the vehicle 1. The obstacle here is the door 41 and the wall surfaces 42 to 45 in front of the garage 40 in the example of FIGS. That is, whether the surrounding state detection means detects the door 41 and the wall surfaces 42 to 45, so that the place where the vehicle 1 is stopped or parked is in the space 46 that is regarded as a sealed space with poor ventilation, This is a parameter for determining whether the user is in an open space with good ventilation.
In the front part of the vehicle 1, a front situation detecting means 16 for detecting a door 41 that is an obstacle in front F is provided. A rear state detection means 17 for detecting a wall surface 42 that is an obstacle in the rear R is provided at the rear of the vehicle 1. On the left and right sides of the vehicle 1, side state detection means 18 and 19 are provided for detecting wall surfaces 43 and 44 that are obstacles. On the dash panel of the vehicle interior 11 of the vehicle 1, for example, an upward situation detection unit 26 for detecting a wall surface (ceiling) 45 serving as an obstacle is provided. In the present embodiment, the front situation detection means 16, the rear situation detection means 17, the side situation detection means 18, 19 and the upper situation detection means 26 constitute an ambient situation detection means.

The front situation detection means 16 is a millimeter wave radar device as a radar irradiation device, which connects a planar antenna and a millimeter wave transmitter / receiver with a waveguide, scans left and right using a drive source, and in a signal processing unit. The radar beat signal is A / D converted by an A / D converter, and frequency analysis is performed by an arithmetic operation circuit such as a DSP to calculate the distance, relative speed, and angle information. Is a well-known one.
The rear situation detection means 17 and the side situation detection means 18 and 19 are infrared rays as a well-known light irradiation device that detects the presence or absence of an obstacle by irradiating an infrared laser and receiving the reflected light of the irradiation light with a light receiving unit. It consists of a radar device (also called an infrared laser device).
The upward situation detection means 26 is composed of a receiving antenna that receives position information J transmitted from an artificial satellite, specifically, a GPS (Global Positioning System) satellite.
Although a millimeter wave radar device is used as the front situation detection means 16, an infrared radar device may be used, and a millimeter wave radar device may be used as the rear situation detection means 17 and the side situation detection means 18 and 19. good.

  In the present embodiment, the side window devices 12L and 12R, which are ventilation means, the rear side window devices 13L and 13R, the sunroof device 14, the front situation detection means 16, the rear situation detection means 17, the side situation detection means 18 and 19, The fuel injection nozzle 20, the upward state detection means 26, the vehicle interior concentration detection means 27, the warning means 28, and the control means 30 constitute a 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. 3, the control means 30 is composed of a computer having 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, the front situation detection means 16, the rear situation detection means 17, the side situation detection means 18 and 19, the rotation speed detection means 25, the upper situation detection means 26 and the vehicle interior concentration detection means 27 are signals. Connected through a line. The vehicle interior concentration detection means 27 detects the carbon monoxide concentration in the vehicle interior 11 and outputs a detection value CA. Detection values D1, D2, D3, D4, D5 indicating that an obstacle has been detected are respectively detected from the front situation detection means 16, the rear situation detection means 17, the side situation detection means 18, 19 and the upper situation detection means 26. Is output. These detection values D1, D2, D3, D4, and D5 are obstacle detection information. The rotation speed detection means 25 detects the rotation speed of the engine 2 and outputs rotation information.

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 the engine 2 based on the detection values D1, D2, D3, D4, D5 from the ambient condition detection means and the detection value CA of the vehicle interior concentration detection means 27, The operation of the fuel injection nozzle drive unit 21, the drive unit 23 of each window regulator device, and the drive unit 24 of the sunroof device 14 is controlled.

  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, and a sealed space process for determining whether the position of the vehicle is in a place that is considered a sealed space. A program as a determination unit to be performed and a program for performing carbon monoxide suppression processing are stored in advance. Although the reference value C1 is a fixed value here, it may be changed by rewriting it arbitrarily from the outside by connecting a connector or the like to the control means 30. In the present embodiment, the reference value C1 has a concentration that may affect the human body.

In step ST1 of FIG. 4, the control unit 30 compares the detection value CA from the vehicle interior concentration detection unit 27 with a preset reference value C1 as to whether or not the carbon monoxide concentration in the vehicle interior 11 is high. judge. When the detected value CA exceeds the reference value C1, the control means 30 determines that the carbon monoxide concentration in the passenger compartment 11 is high and proceeds to step ST2, and when the detected value CA does not exceed the reference value C1, This control loop is terminated, and a standby state is entered until the next loop.
In step ST <b> 2, the control unit 30 determines whether or not the position of the vehicle 1 is located in a space 46 that is a place considered as a sealed space. This determination process will be described later with reference to the flowchart shown in FIG. When the vehicle 1 is located in the space 46 that is regarded as a sealed space, the control means 30 proceeds to step ST3 and operates the warning means 28 to execute warning processing. Here, for example, since the carbon monoxide concentration in the passenger compartment 11 in the space 46 that is regarded as a sealed space is increasing, a warning message that prompts the vehicle 1 to move from the current location is displayed. Proceed to step ST4.

When the vehicle 1 is not located in the space 46 that is regarded as a sealed space in step ST2, the control means 30 determines that the carbon monoxide concentration in the passenger compartment 11 has increased, and proceeds to step ST8. Proceed with the ventilation process to activate the ventilation means. 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 ST8, and will be in a standby state until the next loop.
In step ST4, the control means 30 switches the operating state of the engine 2 to an operation region in which the carbon monoxide concentration in the exhaust gas G is reduced by setting the air-fuel ratio of the exhaust gas G to a lean state. 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 operation region may be determined by a known method such as information on the rotation of the engine 2 by the rotation speed detection means 25 and information on the intake air amount from an airflow sensor, an accelerator opening sensor, or the like.

After the end of step ST4, the control means 30 proceeds to step ST5 and determines whether or not the carbon monoxide concentration in the passenger compartment 11 is high after the change of the operation region, and the detected value CA and the reference value from the passenger compartment concentration detecting means 27. Judgment is made by comparing with C1. If the detected value CA exceeds the reference value C1, the control means 30 proceeds to step ST6 on the assumption that the increase in the carbon monoxide concentration cannot be suppressed by the operation switching of the engine 2 (which tends to increase). If the detected value CA does not exceed the reference value C1, the control means 30 assumes that the carbon monoxide concentration has decreased due to the operation switching of the engine 2 and ends this control and enters a standby state.
In step ST6, the control means 30 performs 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 ST7 and executes warning processing by the warning means 28. The warning by the warning process here is given in order to give the highest priority to the evacuation of the passenger from the passenger compartment 11, and the warning means 28 performs voice warning and flashing of light, etc., and sleeps in the passenger compartment 11. It is a level that can fully inform the passengers of the warning. The control means 30 finishes this control after the end of step ST7, and will be in a standby state until the next loop.

Next, the sealed space determination process will be described with reference to the flowchart of FIG.
When the carbon monoxide concentration in the passenger compartment 11 is higher than the reference value C1, the control means 30 determines the front situation detection means 16, the rear situation detection means 17 and the side in step ST11 in order to grasp the situation around the vehicle 1. If there are detection values D1, D2, D3, and D4 indicating that obstacles have been detected from the situation detection means 18 and 19 (4 directions), the detection values are captured. In the present embodiment, these detection values D1, D2, D3, and D4 are displayed as distances to the obstacle.
The control means 30 determines whether or not there are three or more detection values that have been taken in. If there are three or more detection values, the control means 30 proceeds to step ST13, where an obstacle (door 41) is provided in at least three directions of the vehicle 1. And the wall surfaces 42 to 44), it is determined that the vehicle 1 is located in the space 46 that is regarded as a sealed space. On the other hand, when two or less detection values are captured, it is assumed that the detected value is located in the open space of the vehicle 1.

As described above, in the present embodiment, the control means 30 assumes that the detection value CA from the vehicle interior concentration detection means 27 is higher than the reference value C1, and that the vehicle 1 is regarded as a sealed space from the detection result from the surrounding state detection means. When it is determined that the engine 2 is in the position, the operation region of the engine 2 is set to be an operation region in which the emission of carbon monoxide is low (so that the air-fuel ratio of the exhaust gas G is in a lean state). Control the state. Therefore, it is possible to accurately determine the situation around the vehicle 1 that the vehicle 1 is located in the space 46 of the garage 40, and to suppress carbon monoxide generated from the vehicle 1. ) An increase in the concentration of carbon monoxide in the passenger compartment 11 due to carbon monoxide can be suppressed.
In the present embodiment, as the surrounding situation detection means, the front situation detection means 16, the rear situation detection means 17, and the lateral situation detection that detect obstacles on the front F, rear R, left and right side W and upper Y of the vehicle 1 are detected. Means 18 and 19 and upward situation detection means 26 are provided. When detection values are output from at least three of these surrounding state detection means, it is determined that the vehicle 1 is located in the space 46 that is regarded as a sealed space. The situation can be detected accurately.

In the present embodiment, the control means 30 is detected by the vehicle interior concentration detection means 27 after the operating region of the engine 2 has a low carbon monoxide emission and the air-fuel ratio of the exhaust gas G is in a lean operating state. When the concentration information of the generated carbon monoxide tends to increase, the operation of the engine 2 is stopped, so that the emission of carbon monoxide can be further reduced, and the monoxide in the vehicle interior 11 by the carbon monoxide from the vehicle 1 can be reduced. An increase in carbon concentration can be suppressed.
In the present embodiment, the control means 30 performs ventilation when the detection value CA from the vehicle interior concentration detection means 27 is higher than the reference value C1 and the vehicle 1 is not located in the sealed space from the detection result of the surrounding state detection means. Since the vehicle interior 11 is ventilated by operating the means, the carbon monoxide concentration in the vehicle interior 11 can be reduced.
In the present embodiment, the detection value CA from the vehicle interior concentration detection means 27 is higher than the reference value C1, the operating region of the engine 2 has a low carbon monoxide emission, and the air-fuel ratio of the exhaust gas G is lean. Since the warning means 28 is operated so as to issue warning information before the driving state or after the operation of the engine 2 is stopped, an increase in the carbon monoxide concentration in the passenger compartment 11 can be notified to the passenger.

The sealed space determination process is not limited to the embodiment shown in FIG. 5, and may be the embodiment shown in FIGS. 6 and 7. The enclosed space determination process according to each of these embodiments is executed by the control means 30.
In the embodiment shown in FIG. 6, after fetching the detection value at step ST21, the control means 30 determines whether or not there is a detection value D5 from the upper situation detection means 26 at step ST22, and there is the detection value D5. In this case, the process proceeds to step ST23, and if there is no detection value D5, it is immediately determined that the vehicle 1 is located in the space 46 (a place regarded as a sealed space), and the process returns to the flowchart of FIG.
In step ST23, the control means 30 determines whether or not there are three or more acquired detection values. If there are three or more detection values, the vehicle 1 is located in the space 46 (a place regarded as a sealed space). If there are not three or more, it is determined that the vehicle 1 is located in the open space, and the process returns to the flowchart of FIG.
Since the upper situation detection means 26 is composed of a receiving antenna that receives position information J from a GPS satellite, the position information J cannot be received when there is no detection value D5, such as a tunnel or an underground parking lot that has high shielding properties. It is assumed that the vehicle 1 is located in the space. In the present embodiment, it is assumed that the space 46 of the garage 40 is a sealed space.
For this reason, when the detection value D5 is not included in the three detection values serving as the position determination reference of the vehicle 1, it is determined that the vehicle 1 is located in the space 46 that is one of the places regarded as the sealed space. By doing so, the surrounding state of the vehicle 1 can be determined with a small number of surrounding state detecting means. Therefore, the determination time can be shortened and the load on the control means 30 can be reduced.

In the sealed space determination process shown in FIG. 7, after fetching the detection value in step ST31, the control unit 30 determines whether there is a detection value D5 from the upper situation detection unit 26 in step ST32, and detects the detection value D5. If there is a vehicle, the vehicle 1 is positioned in the open space, and if there is no detection value D5, it is determined that the vehicle 1 is positioned in the space 46 (a place considered as a sealed space). good.
In this case, the absence of the detection value D5 assumes that the garage 40 has a wall 45 serving as a ceiling and the door 41 is also closed, and the space 46 of the garage 40 is regarded as a sealed space. And the determination that the vehicle 1 is located in the space 46 can be performed with a small number of surrounding state detection devices (vehicle compartment concentration detection means 27), leading to a reduction in detection time.

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.
In the present embodiment, the carbon monoxide concentration in the passenger compartment 11 is used as a parameter for increasing the carbon monoxide concentration. However, for example, the carbon monoxide concentration in the intake air A may be used. That is, in the present embodiment, the concentration detection means is disposed in the vehicle interior 11 as the vehicle interior concentration detection means 27. Instead, it is disposed outside the vehicle, detects the carbon monoxide concentration outside the vehicle, and detects the vehicle concentration from the detected value. The carbon monoxide concentration in the room 11 may be estimated. Alternatively, based on the detected value of the carbon monoxide concentration outside the vehicle and the detected value of the surrounding state detection means, the operating region in which the concentration of carbon monoxide in the exhaust gas G decreases (the operating region of the engine 2 is the emission of carbon monoxide). However, the operating state of the engine 2 may be controlled so that the air-fuel ratio of the exhaust gas G becomes lean.
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, or 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, 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, 16 ... Ambient condition detection means (laser irradiation device), 17, 18, 19 ... Ambient condition detection means (light irradiation device), 24 ... Ventilation means (Sunroof device), 26 ... Ambient condition detection means (receiving antenna), 27 ... Concentration detection means, 28 ... Warning means, 30 ... Control means, 100 ... Carbon monoxide suppression for vehicles Device, CA ... detected value of concentration detecting means, C1 ... reference value, D1, D2, D3, D4, D5 ... detected value (obstacle detection information) of ambient condition detecting means, G ... Exhaust gas, J ... position information

Claims (9)

Concentration detecting means for detecting the concentration of carbon monoxide in the interior or exterior of the vehicle in which the internal combustion engine is mounted;
An ambient condition detecting means for detecting an ambient condition of the vehicle;
Control for controlling the operation state of the internal combustion engine so that the air-fuel ratio of the exhaust gas discharged from the internal combustion engine becomes lean based on the detection value of the concentration detection means and the detection value of the ambient condition detection means Means for suppressing carbon monoxide for a vehicle, comprising: means.   When the detection value from the concentration detection means is higher than a reference value and the vehicle is located in a place that is regarded as a sealed space from the detection result from the ambient condition detection means, 2. The vehicle carbon monoxide suppression device according to claim 1, wherein 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. The ambient condition detection means detects the presence or absence of an obstacle in at least three directions among the front, rear, left and right sides and the upper side of the vehicle,
The said control means determines that the said vehicle is located in the place considered as sealed space, when there exists obstruction detection information from at least three directions by the said surrounding condition detection means. Item 3. The vehicle carbon monoxide suppression device according to Item 1 or 2. The ambient condition detecting means is configured to irradiate an irradiation unit for irradiating an obstacle detection radar in at least three directions among four directions of the front, rear, and left and right sides of the vehicle, and a reflected wave of the irradiated radar. It is at least one of a radar irradiation device having a receiving unit for receiving or an irradiation unit for irradiating detection light for detecting an obstacle and a light irradiation device having a light receiving unit for receiving reflected light of the irradiated detection light,
The control means determines whether or not the vehicle is located in a place that is regarded as a sealed space from the presence or absence of a reflected wave received by the receiving unit or reflected light received by the light receiving unit. The vehicle carbon monoxide suppression device according to claim 1 or 2. The ambient condition detection means is a receiving antenna that receives position information transmitted from an artificial satellite,
4. The control unit according to claim 1, wherein when the position information cannot be received by the receiving antenna, the control unit determines that the vehicle is located at a place that is regarded as a sealed space. 5. The carbon monoxide suppression device for vehicles as described in 2.   The control means, when the concentration information of the carbon monoxide detected by the concentration detection means tends to increase after the internal combustion engine is brought into an operation state in which the air-fuel ratio of the exhaust gas becomes lean. 6. 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 ventilation means for ventilating the air in the vehicle interior;
When the control means determines that the detected value from the concentration detection means is higher than a reference value and the vehicle is not located in a place that is regarded as a sealed space from the detection result of the ambient condition detection means, The vehicle carbon monoxide suppression device according to any one of claims 1 to 6, wherein the vehicle interior is controlled by operating a ventilation means. A warning means for issuing warning information;
The control means has a detection value from the concentration detection means higher than a reference value, and before the internal combustion engine is put into an operating state in which the air-fuel ratio of the exhaust gas becomes a lean state, or after the operation of the internal combustion engine is stopped, The carbon monoxide suppression device for a vehicle according to any one of claims 1 to 7, wherein the warning means is operated to issue warning information.   9. The vehicle one according to claim 1, wherein the concentration detection unit is disposed in the vehicle interior and detects a carbon monoxide concentration in the vehicle interior. 10. Carbon oxide suppression device.

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