Vehicle control system

Abstract

To provide a vehicle control device that can properly ventilate the inside of the crankcase. [Solution] The control device 1 has a processing circuit 1A. The internal combustion engine 10 has a ventilation system. The ventilation system has a first passage R1, a second passage R2, and a first PCV valve 51E. The first passage R1 is connected to the crankcase 14 and the intake passage R IN The second passage R2 communicates with the downstream portion of the throttle valve 39 in the crankcase 14 and the intake passage R IN It connects the compressor 37A and the electric supercharger 36. The first PCV valve 51E is provided in the first passage R1. The first PCV valve 51E controls the intake pressure P IM The valve opens when the intake pressure P becomes lower than the pressure inside the crankcase 14. Processing circuit 1A controls the intake pressure P IM If the pressure remains at or near atmospheric pressure for a set period of time, the electric supercharger 36 is activated.

Description

[Technical Field]

[0001] This invention relates to a vehicle control device. [Background technology]

[0002] In vehicle internal combustion engines, blow-by gas can leak into the crankcase through the gap between the piston and cylinder. Therefore, for example, the control device for an internal combustion engine described in Patent Document 1 ventilates the crankcase using the negative pressure in the intake manifold. [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2024-076657 [Overview of the project] [Problems that the invention aims to solve]

[0004] The control device described in Patent Document 1 has the following concerns. Specifically, the control device in Patent Document 1 ventilates the crankcase using the negative pressure in the intake manifold. Therefore, if the pressure in the intake manifold is atmospheric pressure or close to atmospheric pressure, the crankcase may not be properly ventilated. [Means for solving the problem]

[0005] The vehicle control device for solving the above problems has a processing circuit. The vehicle includes an internal combustion engine having a crankcase, a throttle valve provided in an intake passage of the internal combustion engine, a compressor provided upstream of the throttle valve in the intake passage, and an electric supercharger provided further upstream of the compressor in the intake passage. The internal combustion engine has a ventilation system for ventilating the inside of the crankcase. The ventilation system has a first passage, a second passage, and a first one-way valve. The first passage communicates the crankcase with a portion on the downstream side of the throttle valve in the intake passage. The second passage communicates the crankcase with a portion between the compressor and the electric supercharger in the intake passage. The first one-way valve is a first one-way valve provided in the first passage, and opens when the intake pressure, which is the pressure downstream of the throttle valve in the intake passage, becomes lower than the pressure in the crankcase. The processing circuit is configured to operate the electric supercharger when the intake pressure is in a state of being atmospheric pressure or near atmospheric pressure and continues for a set time.

Advantages of the Invention

[0006] According to the vehicle control device of the present invention, the inside of the crankcase can be appropriately ventilated.

Brief Description of the Drawings

[0007] [Figure 1] It is a schematic diagram showing the configuration of an internal combustion engine according to an embodiment. [Figure 2] It is a flowchart showing the procedure of ventilation processing executed by a control device according to an embodiment.

Embodiments for Carrying Out the Invention

[0008] Hereinafter, an embodiment of the vehicle control device will be described. As shown in FIG. 1, the control device 1 controls the vehicle. The vehicle includes an internal combustion engine 10. The internal combustion engine 10 is a power source of the vehicle and uses, for example, hydrogen as fuel. The internal combustion engine 10 has a cylinder block 11, a cylinder head 12, a head cover 13, and a crankcase 14.

[0009] The cylinder block 11 has a plurality of cylinders 15 and a plurality of pistons 16. For convenience of explanation, only one cylinder 15 and one piston 16 are shown in FIG. 1. The cylinder 15 is a space provided inside the cylinder block 11 and has a circular cross-sectional shape. The piston 16 is a cylindrical body having a circular cross-sectional shape and is reciprocally accommodated inside the cylinder 15.

[0010] The cylinder head 12 is provided on the upper part of the cylinder block 11. The cylinder head 12 has a combustion chamber 17, an intake port 18, and an exhaust port 19. The combustion chamber 17 is a space where combustion occurs in the internal combustion engine 10 and is formed by the cylinder block 11, the cylinder head 12, and the piston 16. The intake port 18 introduces intake air into the combustion chamber 17. An intake valve 20 is provided in the intake port 18. The exhaust port 19 discharges exhaust from the combustion chamber 17. An exhaust valve 21 is provided in the exhaust port 19.

[0011] The cylinder head 12 has a spark plug 22. The spark plug 22 is a device that ignites an air-fuel mixture of fuel injected from a fuel injection valve (not shown) into the combustion chamber 17 and air introduced into the combustion chamber 17 from the intake port 18. The fuel injection valve is provided in the cylinder head 12. The fuel injected from the fuel injection valve is, for example, hydrogen.

[0012] The head cover 13 is provided on the upper part of the cylinder head 12. The head cover 13 is a hollow body that covers the upper part of the cylinder head 12. The crankcase 14 is located at the bottom of the cylinder block 11. The crankcase 14 houses the crankshaft (not shown). The crankshaft is connected to the piston 16 via a connecting rod (not shown). The crankshaft rotates in conjunction with the reciprocating motion of the piston 16.

[0013] The vehicle has an intake passage R IN and exhaust passage R OUT It has the following: Intake passage R IN This is a passage for introducing air into the combustion chamber 17 of the internal combustion engine 10, and has an intake manifold 31 and an intake pipe 32. Exhaust passage R OUT This is a passage for discharging exhaust gas from the combustion chamber 17 of the internal combustion engine 10, and has an exhaust pipe 33. The first end of the exhaust pipe 33 is connected to the downstream part of the exhaust port 19. The second end of the exhaust pipe 33 is open to the atmosphere via the exhaust system.

[0014] The intake manifold 31 is connected to the upstream part of the intake port 18. The upstream part is the portion of the intake port 18 opposite the combustion chamber 17. The intake manifold 31 is equipped with an intake pressure sensor 34. The intake pressure sensor 34 measures the intake pressure P IM It detects the inhalation pressure P. IM This is the pressure inside the intake manifold 31.

[0015] The intake pipe 32 is connected to the upstream portion of the intake manifold 31. The upstream portion is the part of the intake manifold 31 opposite the intake port 18. The intake manifold 32 includes an air cleaner 35, an electric supercharger 36, a turbocharger 37, an intercooler 38, and a throttle valve 39. The air cleaner 35, electric supercharger 36, turbocharger 37, intercooler 38, and throttle valve 39 are arranged in that order from the upstream side of the intake manifold 32.

[0016] The air cleaner 35 filters the air taken into the intake pipe 32. The electric supercharger 36 assists in providing the pressure necessary for supercharging. Supercharging is the process of compressing air to increase its density and introducing it into the cylinder 15 of the internal combustion engine 10. The electric supercharger 36 has a motor and a compressor driven by the motor. The compressor compresses the air in the intake manifold 32.

[0017] The turbocharger 37 is a device that supercharges the internal combustion engine 10 using exhaust gas from the internal combustion engine 10 as a power source. The turbocharger 37 has a compressor 37A and a turbine 37B. The compressor 37A is located on the intake pipe 32. The turbine 37B is located on the exhaust pipe 33.

[0018] The compressor 37A and the turbine 37B are connected coaxially. The turbine 37B is driven by exhaust gas from the internal combustion engine 10. The compressor 37A is driven by the turbine 37B. The compressor 37A compresses the air in the intake manifold 32. The temperature of the air rises as it is compressed.

[0019] The supercharging by the turbocharger 37 is assisted by the electric supercharger 36. This ensures the responsiveness of the turbocharger 37. For example, in the low rotational speed range of the turbine 37B, compressed air from the electric supercharger 36 is supplied to the compressor 37A.

[0020] The intercooler 38 is, for example, a heat exchanger that cools the air whose temperature has risen due to compression by the compressor 37A. The throttle valve 39 is a valve that adjusts the amount of intake air to the internal combustion engine 10. The opening degree of the throttle valve 39 is changed, for example, by a motor.

[0021] <Ventilation System> The internal combustion engine 10 has a ventilation system. The ventilation system is configured to ventilate blow-by gas in the crankcase 14. Blow-by gas is gas that leaks from the combustion chamber 17 into the crankcase 14 through the gap between the piston 16 and the cylinder 15 during the compression stroke or combustion stroke of the internal combustion engine 10. Blow-by gas includes, for example, combustion gases, unburned fuel mixture, and lubricating oil for the internal combustion engine 10. The ventilation system has, for example, a first passage R1, a second passage R2, and a third passage R3.

[0022] <First passage R1> The first passage R1 is a passage that connects the crankcase 14 and the intake manifold 31. The first passage R1 includes a first gas passage 51A, a second gas passage 51B, a first oil separator 51C, a second oil separator 51D, and a first PCV (Positive Crankcase Ventilation) valve 51E.

[0023] The first oil separator 51C is located in the middle of the first gas passage 51A in the cylinder block 11. The second oil separator 51D is located inside the head cover 13. The first oil separator 51C and the second oil separator 51D separate the blow-by gas flowing through the first passage R1 into oil mist and unburned gas.

[0024] The first gas passage 51A is a gas passage that passes through the inside of the cylinder block 11 and the cylinder head 12, and is a gas passage that communicates between the crankcase 14 and the second oil separator 51D. The first gas passage 51A guides the blow-by gas in the crankcase 14 to the second oil separator 51D.

[0025] The second gas passage 51B connects the second oil separator 51D and the intake manifold 31. The second gas passage 51B may be, for example, a heat-resistant silicone hose. The second gas passage 51B guides unburned gas in the second oil separator 51D to the intake manifold 31.

[0026] The first PCV valve 51E is located in the second gas passage 51B. The first PCV valve 51E corresponds to the first one-way valve. The first PCV valve 51E restricts the flow of gas from the intake manifold 31 to the crankcase 14 via the first passage R1, while allowing the flow of gas from the crankcase 14 to the intake manifold 31 via the first passage R1. However, the first PCV valve 51E opens when the pressure in the intake manifold 31 is lower than the pressure in the second oil separator 51D. This allows gas to flow from the second oil separator 51D into the intake manifold 31. The pressure in the second oil separator 51D is equal to the pressure in the crankcase 14.

[0027] <Second passageway R2> The second passage R2 is a passage that connects the portion of the intake pipe 32 between the electric supercharger 36 and the turbocharger 37 with the crankcase 14. The second passage R2 includes a third gas passage 52A, a valve chamber 52B, a third oil separator 52C, and a fourth gas passage 52D.

[0028] The third gas passage 52A is a gas passage that passes through the inside of the cylinder block 11 and cylinder head 12, and is a gas passage that connects the crankcase 14 and the valve chamber 52B. The third gas passage 52A functions as a passage for returning oil from the valve chamber 52B to the crankcase 14, and also functions as a passage for circulating gas between the valve chamber 52B and the crankcase 14.

[0029] The valve train chamber 52B is a space located inside the head cover 13 and houses the valve train mechanism of the cylinder head 12. The valve train mechanism controls the operation of the intake valve 20 and exhaust valve 21 in the internal combustion engine 10.

[0030] The third oil separator 52C is located inside the head cover 13. Gas can flow between the third oil separator 52C and the valve train chamber 52B. The third oil separator 52C separates the blow-by gas flowing through the second passage R2 into oil mist and unburned gas.

[0031] The fourth gas passage 52D connects the portion of the intake pipe 32 between the electric supercharger 36 and the turbocharger 37 to the third oil separator 52C. The fourth gas passage 52D may be, for example, a silicone hose with excellent heat resistance.

[0032] <Third passage R3> The third passage R3 is a passage that connects the crankcase 14 and the intake manifold 31. The third passage R3 includes a fifth gas passage 53A and a second PCV valve 53B.

[0033] The fifth gas passage 53A connects the crankcase 14 and the intake manifold 31. The fifth gas passage 53A may be, for example, a silicone hose with excellent heat resistance.

[0034] The second PCV valve 53B is located in the fifth gas passage 53A. The second PCV valve 53B corresponds to a second one-way valve. The second PCV valve 53B restricts the flow of gas from the crankcase 14 to the intake manifold 31 via the third passage R3, while allowing the flow of gas from the intake manifold 31 to the crankcase 14 via the third passage R3. However, the second PCV valve 53B controls the pressure in the intake manifold 31, i.e., the intake pressure P. IMIt opens when the pressure in the crankcase 14 becomes higher than the pressure in the crankcase 14. As a result, the gas can flow from the intake manifold 31 into the interior of the crankcase 14 through the third passage R3.

[0035] <Ventilation during naturally aspirated operation> Next, the ventilation of the crankcase 14 when the internal combustion engine 10 is operating in the naturally aspirated region will be described. In this case, the intake air is throttled by the throttle valve 39 for load adjustment of the internal combustion engine 10. Therefore, the pressure in the intake passage R IN downstream of the throttle valve 39, for example, the pressure in the intake manifold 31 becomes negative pressure. Negative pressure is a pressure lower than atmospheric pressure. Since the pressure in the intake manifold 31 becomes lower than the pressure in the crankcase 14, and thus the pressure in the second oil separator 51D, the first PCV valve 51E opens.

[0036] When the first PCV valve 51E opens, air flows into the crankcase 14 from the intake pipe 32 through the second passage R2. Also, the blow-by gas in the crankcase 14 is sucked into the intake manifold 31 through the first passage R1. The blow-by gas sucked into the intake manifold 31 is sent to the combustion chamber 17 together with the intake air and burned. By treating the blow-by gas in this way, the interior of the crankcase 14 is ventilated. Therefore, the hydrogen concentration in the crankcase 14 decreases. [[ID=X]]

[0037] <Ventilation during supercharged operation> Next, the ventilation of the crankcase 14 when the internal combustion engine 10 is operating in the supercharged region will be described. In this case, the intake passage R IN downstream of the compressor 37A, for example, the pressure in the intake manifold 31 becomes positive pressure. Positive pressure is a pressure higher than atmospheric pressure. Since the pressure in the intake manifold 31 becomes higher than the pressure in the crankcase 14, and thus the pressure in the second oil separator 51D, the second PCV valve 53B opens.

[0038] When the second PCV valve 53B opens, air flows from the intake manifold 31 into the crankcase 14 via the third passage R3. Additionally, blow-by gas from the crankcase 14 is discharged to the intake manifold 32 via the second passage R2. The blow-by gas discharged to the intake manifold 32 is then sent to the combustion chamber 17 along with the intake air for combustion. This process of handling the blow-by gas ventilates the crankcase 14, thereby reducing the hydrogen concentration within the crankcase 14.

[0039] With this ventilation system, the crankcase 14 can be ventilated regardless of whether the internal combustion engine 10 is operating in the naturally aspirated or supercharged range. However, the ventilation system has the following concerns. For example, in operating conditions where the engine load is low and the accelerator input is kept constant, the pressure inside the intake manifold 31, i.e., the intake pressure P, can be affected. IM This pressure becomes atmospheric pressure or near atmospheric pressure. In this case, the first PCV valve 51E and the second PCV valve 53B become difficult to open, which may result in inadequate ventilation inside the crankcase 14. Therefore, in this embodiment, the control device 1 is configured as follows.

[0040] <Control device 1> The control device 1 has a processing circuit 1A that includes one of the following three configurations A1, A2, and A3.

[0041] A1. One or more processors that operate according to a computer program, which is software. A processor includes a CPU (Central Processing Unit) and memory. A2. One or more dedicated circuits, such as application-specific integrated circuits (ASICs), that perform at least some of the various processes. The ASIC may include a CPU and memory.

[0042] A3. A circuit combining configurations A1 and A2. Memory is a medium readable by a computer that stores programs describing processes or instructions for the computer. In this embodiment, the computer is the CPU. Memory includes RAM (Random Access Memory) and ROM (Read Only Memory). The CPU performs various controls by executing the programs stored in memory at predetermined calculation cycles.

[0043] Processing circuit 1A acquires the detection results from various sensors mounted on the vehicle. The sensors include an intake pressure sensor 34. Processing circuit 1A receives the intake pressure P detected by the intake pressure sensor 34. IM Based on this, a ventilation process is performed. The ventilation process is a process that uses an electric supercharger 36 to promote the ventilation of hydrogen in the crankcase 14.

[0044] <Ventilation Procedure> Next, the procedure for ventilation processing performed by processing circuit 1A will be explained. As shown in Figure 2, the processing circuit 1A controls the intake pressure P IM It is determined whether the pressure is within the set range (step S101). The set range is the intake pressure P IM This is a criterion for determining whether the pressure is close to atmospheric pressure. The setting range is the range of pressures set with a predetermined margin, based on atmospheric pressure. The setting range is stored in memory.

[0045] Processing circuit 1A controls the intake pressure P IM If it is within the set range (YES in step S101), intake pressure P IM It determines whether the condition in which the intake pressure P is determined to be within the set range continued for a set time. The set time is determined by the intake pressure P. IM This is the time required to determine that the intake pressure P has reached the set range. By setting a range, the intake pressure P IM Even if the intake pressure P temporarily drops within the set range, the processing circuit 1A will... IM It does not determine that it is within the set range.

[0046] Processing circuit 1A controls the intake pressure P IM If it is determined that the condition in which the intake pressure PIM is within the set range continues for the set time (YES in step S102), the electric supercharger 36 is activated (step S103). If the condition in which the intake pressure PIM is within the set range continues for the set time, there is a risk that the hydrogen concentration inside the crankcase 14 is increasing. For this reason, the electric supercharger 36 is activated to ventilate the inside of the crankcase 14.

[0047] After this, the processing circuit 1A controls the opening of the throttle valve 39 to adjust the intake air volume (step S104) and then terminates the process. For example, the processing circuit 1A controls the throttle valve 39 to the closed position in order to suppress the increase in intake air volume that occurs when the electric supercharger 36 is operated.

[0048] Furthermore, in step S102 above, the processing circuit 1A controls the intake pressure P IM If the condition in which the intake pressure P is determined to be within the set range does not continue for the set time (NO in step S102), the process is terminated. Also, in step S101, the processing circuit 1A determines that the intake pressure P IM If the value is outside the set range (NO in step S101), the process is terminated.

[0049] <Gas flow during ventilation> Next, we will explain the gas flow during ventilation using the electric supercharger 36. As shown in Figure 1, the air compressed by the electric supercharger 36 flows into the crankcase 14 through the second passage R2. The blow-by gas in the crankcase 14 flows into the second oil separator 51D through the first gas passage 51A. The pressure of the air compressed by the electric supercharger 36 is higher than atmospheric pressure. Because the pressure in the second oil separator 51D becomes higher than the pressure in the intake manifold 31, the first PCV valve 51E opens.

[0050] When the first PCV valve 51E opens, blow-by gas in the crankcase 14 is drawn into the intake manifold 31 via the first passage R1. The blow-by gas drawn into the intake manifold 31 is sent to the combustion chamber 17 along with the intake air and burned. By processing the blow-by gas in this way, the inside of the crankcase 14 is ventilated. As a result, the hydrogen concentration inside the crankcase 14 decreases.

[0051] Furthermore, a portion of the air compressed by the electric supercharger 36 flows into the combustion chamber 17 via the intake pipe 32 and the intake manifold 31. <Effects of the Embodiment> This embodiment provides the following effects.

[0052] (1) The internal combustion engine 10 has a ventilation system for ventilating the inside of the crankcase 14. The ventilation system has a first passage R1, a second passage R2, and a first PCV valve 51E. The first passage R1 is connected to the crankcase 14 and the intake passage R IN The second passage R2 communicates with the downstream portion of the throttle valve 39 in the crankcase 14 and the intake passage R IN It connects the compressor 37A and the electric supercharger 36. The first PCV valve 51E is provided in the first passage R1. The first PCV valve 51E controls the intake pressure P IM The valve opens when the intake pressure P becomes lower than the pressure inside the crankcase 14. IM is the intake passage R IN This is the pressure downstream of the throttle valve 39. Processing circuit 1A controls the intake pressure P. IM If the pressure remains at or near atmospheric pressure for a set period of time, the electric supercharger 36 is activated.

[0053] According to this configuration, the intake pressure P IMIf the intake pressure remains at or near atmospheric pressure for a set time, the electric supercharger 36 activates. The air compressed by the electric supercharger 36 flows into the crankcase 14 through the second passage R2. Because the pressure of the air compressed by the electric supercharger 36 is higher than atmospheric pressure, the pressure inside the crankcase 14 is at or near atmospheric pressure, which is the intake pressure P. IM It becomes higher than this. Therefore, the first PCV valve 51E opens. The blow-by gas in the crankcase 14 passes through the first passage R1 to the intake passage R IN It is discharged inside. Intake passage R IN "Inside" refers, for example, to the intake manifold 31. This reduces the hydrogen concentration inside the crankcase 14. Therefore, the intake pressure P IM Whether the pressure is at or near atmospheric pressure, the inside of the crankcase 14 can be properly ventilated.

[0054] Furthermore, when the internal combustion engine 10 is operating in the naturally aspirated range, the intake pressure P IM This results in negative pressure. Intake pressure P IM As the pressure becomes lower than the pressure inside the crankcase 14, the first PCV valve 51E opens. When the first PCV valve 51E opens, the intake passage R IN Air flows into the crankcase 14 through the second passage R2. Blow-by gas in the crankcase 14 flows through the first passage R1 to the intake passage R IN It is discharged inside. Therefore, even when the internal combustion engine 10 is operating in the naturally aspirated range, the inside of the crankcase 14 can be properly ventilated.

[0055] (2) The ventilation system further comprises a third passage R3 and a second PCV valve 53B. The third passage R3 is connected to the crankcase 14 and the intake passage R IN It communicates with the downstream portion of the throttle valve 39. The second PCV valve 53B is provided in the third passage R3. The second PCV valve 53B controls the intake pressure P IM The valve opens when the pressure becomes higher than the pressure inside the crankcase 14.

[0056] According to this configuration, when the internal combustion engine 10 is operating in the supercharging range, the intake pressure P IM This becomes positive pressure. Intake pressure P IM As this becomes higher than the pressure inside the crankcase 14, the second PCV valve 53B opens. When the second PCV valve 53B opens, the intake passage R IN Air flows into the crankcase 14 through the third passage R3. Blow-by gas in the crankcase 14 is discharged to the intake manifold 32 through the second passage R2. Therefore, even when the internal combustion engine 10 is operating in the supercharged range, the inside of the crankcase 14 can be properly ventilated.

[0057] (3) When the processing circuit 1A operates the electric supercharger 36 to ventilate the inside of the crankcase 14, it controls the throttle valve 39 to the closed side in order to suppress the increase in intake air volume that occurs when the electric supercharger 36 operates. With this configuration, the increase in intake air volume that occurs when the electric supercharger 36 operates is suppressed. As a result, abrupt changes in the output of the internal combustion engine 10 can be suppressed and the output of the internal combustion engine 10 can be stabilized.

[0058] (4) Intake passage R IN It includes an intake manifold 31 that introduces air into the combustion chamber 17 of the internal combustion engine 10. The intake manifold 31 has an intake pressure sensor 34 that detects the pressure inside the intake manifold 31. Intake pressure P IM This is the pressure inside the intake manifold 31 detected by the intake pressure sensor 34. According to this configuration, the processing circuit 1A receives the intake pressure P via the intake pressure sensor 34. IM This allows for proper monitoring.

[0059] (5) The fuel for the internal combustion engine 10 is hydrogen. In an internal combustion engine 10 that uses hydrogen as fuel, hydrogen may accumulate in the crankcase 14. For this reason, it is necessary to ventilate the inside of the crankcase 14. The control device 1 of this embodiment is suitable for a vehicle equipped with an internal combustion engine 10 that uses hydrogen as fuel.

[0060] <Other Embodiments> This embodiment may be implemented with the following modifications. The first passage R1 is provided to connect the crankcase 14 and the intake manifold 31, but the first passage R1 is connected to the crankcase 14 and the intake passage R IN It is sufficient that it is connected to the downstream portion of the throttle valve 39.

[0061] If, due to product specifications or other reasons, it is not necessary to ventilate the crankcase 14 during supercharging, a vehicle configuration may be adopted in which the third passage R3, which includes the fifth gas passage 53A and the second PCV valve 53B, is omitted.

[0062] • As a ventilation process using the electric supercharger 36, a ventilation process that omits the process in step S104 of Figure 2 may be adopted. The internal combustion engine 10 may be an internal combustion engine that uses a fuel other than hydrogen. The fuel may be, for example, gasoline or diesel. Ventilation of the crankcase 14 is also necessary for internal combustion engines that use a fuel other than hydrogen. [Explanation of symbols]

[0063] 1...Control device, 1A...Processing circuit, 10...Internal combustion engine, 14...Crankcase, 17...Combustion chamber, 36...Electric supercharger, 37A...Compressor, 31...Intake manifold, 34...Intake pressure sensor, 39...Throttle valve, 51E...First PCV valve (first one-way valve), 53B...Second PCV valve (second one-way valve), R IN ...Intake passage, R1...First passage, R2...Second passage, R3...Third passage.

Claims

1. A vehicle control device having a processing circuit, The vehicle comprises an internal combustion engine having a crankcase, a throttle valve provided in the intake passage of the internal combustion engine, a compressor provided upstream of the throttle valve in the intake passage, and an electric supercharger provided further upstream of the compressor in the intake passage. The internal combustion engine has a ventilation system for ventilating the inside of the crankcase, The ventilation system includes a first passage connecting the crankcase and the portion of the intake passage downstream of the throttle valve, A second passage connecting the crankcase and the portion of the intake passage between the compressor and the electric supercharger, The first one-way valve is provided in the first passage and opens when the intake pressure, which is the pressure downstream of the throttle valve in the intake passage, becomes lower than the pressure inside the crankcase. The processing circuit is a vehicle control device configured to activate the electric supercharger when the intake pressure remains at or near atmospheric pressure for a set period of time.

2. The ventilation system includes a third passage that connects the crankcase and the portion of the intake passage downstream of the throttle valve, The vehicle control device according to claim 1, further comprising a second one-way valve provided in the third passage, the second one-way valve which opens when the intake pressure becomes higher than the pressure inside the crankcase.

3. The vehicle control device according to claim 1 or 2, wherein the processing circuit is configured to control the throttle valve to the closed side in order to suppress the increase in intake air volume associated with the operation of the electric supercharger when the electric supercharger is operated to ventilate the inside of the crankcase.

4. The intake passage includes an intake manifold that introduces air into the combustion chamber of the internal combustion engine. The intake manifold has an intake pressure sensor configured to detect the pressure inside the intake manifold, The vehicle control device according to claim 1 or claim 2, wherein the intake pressure is the pressure inside the intake manifold detected by the intake pressure sensor.

5. The vehicle control device according to claim 1 or claim 2, wherein the fuel for the internal combustion engine is hydrogen.

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