Control method and device of hydrogen internal combustion engine system, storage medium and vehicle

Abstract

The invention discloses a control method and device of a hydrogen internal combustion engine system, a storage medium and a vehicle. The method comprises the steps that when a hydrogen internal combustion engine shutdown instruction is received, the actual operation duration of a hydrogen internal combustion engine is obtained; under the condition that the actual operation duration is larger than a first preset time threshold value, the vehicle is controlled to enter an idling operation mode; when the vehicle is in an idle operation mode, the throttle opening is adjusted to be reduced to introduce water vapor into the cylinder using the vacuum degree of the intake manifold. According to the control method, the engine oil emulsification tendency of the hydrogen internal combustion engine can be relieved, the spark plug icing condition in the low-temperature environment in winter is effectively improved, and the use performance of the hydrogen internal combustion engine vehicle is improved.

Description

Technical Field

[0001] The present application relates to the technical field of hydrogen internal combustion engines, and in particular to a control method for a hydrogen internal combustion engine system, a computer-readable storage medium, a vehicle, and a control device for a hydrogen internal combustion engine system. Background Art

[0002] Since hydrogen has a high calorific value and low ignition energy, it is suitable as a fuel for internal combustion engines. That is, hydrogen internal combustion engine technology uses renewable hydrogen as fuel, which can effectively give play to the industrial advantages of traditional internal combustion engine technology and has the advantages of being green and environmentally friendly. Since the volume energy density of hydrogen is very low, the power of a hydrogen internal combustion engine can only reach 60% of that of a gasoline engine at the same displacement. Therefore, using a hydrogen internal combustion engine to drive a vehicle, or a hybrid architecture that matches a hydrogen internal combustion engine with an electric motor, is more suitable for giving play to the technical advantages of a hydrogen internal combustion engine, such as a hybrid architecture, or an extended-range architecture, where a hydrogen internal combustion engine drives the electric motor to generate electricity, charge the high-voltage battery, or power the electric motor to drive the vehicle.

[0003] Since hydrogen does not contain carbon and its combustion product is water, it will not lead to an increase in greenhouse gases. However, after shutdown, the saturated water vapor in the cylinder will condense into liquid water. Even with the effect of an oil-water separator, the emulsification tendency of the lubricating oil may gradually increase after long-term operation. Especially in low-temperature environments, after the saturated water vapor in the cylinder condenses into liquid water, it will further freeze at the electrode of the spark plug, making it difficult to cold-start the low-temperature hydrogen internal combustion engine.

[0004] At present, hydrogen internal combustion engine technology uses the method of extending the starting time to discharge the saturated water vapor retained in the cylinder and ignite multiple times in advance to improve the problem of spark plug icing in low temperature environments. However, this method cannot reduce the risk of condensed liquid water in the cylinder leaking through the piston ring gap to the oil pan and causing oil emulsification, and can only partially improve the phenomenon of low-temperature cold starting difficulties. Summary of the invention

[0005] The present application aims to solve at least one of the technical problems in the related art to a certain extent. To this end, the first purpose of the present application is to propose a control method for a hydrogen internal combustion engine system, which obtains the actual operating time of the hydrogen internal combustion engine when a shutdown command of the hydrogen internal combustion engine is received, and controls the vehicle to enter an idle operation mode when the actual operating time is greater than a first preset time threshold, and when the vehicle is in the idle operation mode, reduces the throttle opening to introduce water vapor into the cylinder by using the vacuum of the intake manifold, thereby alleviating the oil emulsification tendency of the hydrogen internal combustion engine, effectively improving the spark plug icing in the low temperature environment in winter, and improving the performance of the hydrogen internal combustion engine vehicle.

[0006] A second object of the present application is to provide a computer-readable storage medium.

[0007] The third object of the present application is to provide a vehicle.

[0008] The fourth objective of the present application is to provide a control device for a hydrogen internal combustion engine system.

[0009] To achieve the above-mentioned purpose, the first aspect embodiment of the present application proposes a control method for a hydrogen internal combustion engine system, the method comprising: when receiving a hydrogen internal combustion engine shutdown command, obtaining the actual operating time of the hydrogen internal combustion engine; when the actual operating time is greater than a first preset time threshold, controlling the vehicle to enter an idle operation mode; when the vehicle is in the idle operation mode, reducing the throttle opening to utilize the vacuum of the intake manifold to introduce water vapor into the cylinder.

[0010] According to the control method of the hydrogen internal combustion engine system of the embodiment of the present application, when receiving the shutdown command of the hydrogen internal combustion engine, the actual running time of the hydrogen internal combustion engine is obtained. When the actual running time is greater than the first preset time threshold, the vehicle is controlled to enter the idle running mode. When the vehicle is in the idle running mode, the throttle opening is reduced and adjusted to introduce water vapor into the cylinder by using the vacuum degree of the intake manifold. Therefore, the method can alleviate the oil emulsification tendency of the hydrogen internal combustion engine, effectively improve the spark plug icing in the low temperature environment in winter, and improve the performance of the hydrogen internal combustion engine vehicle.

[0011] In addition, the control method of the hydrogen internal combustion engine system according to the above embodiment of the present application may also have the following additional technical features:

[0012] According to an embodiment of the present application, the throttle opening is reduced by adjusting the throttle opening, including: controlling the throttle opening to decrease to a first preset opening; or decreasing the throttle opening at a first preset rate.

[0013] According to one embodiment of the present application, the method further includes: controlling the hydrogen internal combustion engine to shut down when the operating time of the vehicle in the idle operating mode is greater than a second preset time threshold.

[0014] According to an embodiment of the present application, after controlling the hydrogen internal combustion engine to shut down, the method further includes: controlling the throttle opening to increase to a second preset opening, or controlling the throttle opening to increase to a second preset opening at a second preset rate.

[0015] According to one embodiment of the present application, the hydrogen internal combustion engine system includes a hybrid hydrogen internal combustion engine system. After controlling the hydrogen internal combustion engine to shut down, the method also includes: when the hydrogen internal combustion engine system is a hybrid hydrogen internal combustion engine system, if the hybrid architecture of the vehicle is a target hybrid architecture, then extending the time for the speed of the hydrogen internal combustion engine to be reduced to zero; wherein the target hybrid architecture is an architecture in which the motor is directly connected to the hydrogen internal combustion engine.

[0016] According to one embodiment of the present application, in the process of prolonging the time for the speed of the hydrogen internal combustion engine to be reduced to zero, the method further includes: controlling the motor to drive the hydrogen internal combustion engine to rotate at a preset speed.

[0017] According to one embodiment of the present application, the hydrogen internal combustion engine system includes a hybrid hydrogen internal combustion engine system, and the method further includes: when the hydrogen internal combustion engine system is a hybrid hydrogen internal combustion engine system, if the power system mode of the vehicle is switched from a hybrid mode to a pure electric mode, it is determined that a hydrogen internal combustion engine shutdown command is received; or, when the vehicle is in a power-off process, it is determined that a hydrogen internal combustion engine shutdown command is received.

[0018] In order to achieve the above-mentioned purpose, a second embodiment of the present application proposes a computer-readable storage medium on which a program is stored, and when the program is executed by a processor, the control method of the above-mentioned hydrogen internal combustion engine system is implemented.

[0019] According to the computer-readable storage medium of the embodiment of the present application, by implementing the above-mentioned control method of the hydrogen internal combustion engine system during execution, the oil emulsification tendency of the hydrogen internal combustion engine can be alleviated, the spark plug freezing condition in the low temperature environment in winter can be effectively improved, and the performance of the hydrogen internal combustion engine vehicle can be improved.

[0020] To achieve the above-mentioned purpose, a vehicle is proposed in the third aspect of the present application, including a memory, a processor, and a program stored in the memory and executable on the processor, and when the processor executes the program, the above-mentioned control method of the hydrogen internal combustion engine system is implemented.

[0021] According to the vehicle of the embodiment of the present application, by executing the above-mentioned control method of the hydrogen internal combustion engine system, the oil emulsification tendency of the hydrogen internal combustion engine can be alleviated, the spark plug freezing condition in the low temperature environment in winter can be effectively improved, and the performance of the hydrogen internal combustion engine vehicle can be improved.

[0022] To achieve the above-mentioned purpose, the fourth aspect embodiment of the present application proposes a control device for a hydrogen internal combustion engine system, the device comprising: an acquisition module, which acquires the actual operating time of the hydrogen internal combustion engine when receiving a shutdown command of the hydrogen internal combustion engine; a control module, which is used to control the vehicle to enter an idle operation mode when the actual operating time is greater than a first preset time threshold; the control module is also used to reduce the throttle opening when the vehicle is in the idle operation mode, so as to use the vacuum of the intake manifold to introduce water vapor into the cylinder.

[0023] According to the control device of the hydrogen internal combustion engine system of the embodiment of the present application, the acquisition module is used to obtain the actual running time of the hydrogen internal combustion engine when receiving the shutdown command of the hydrogen internal combustion engine, and the control module is used to control the vehicle to enter the idle running mode when the actual running time is greater than the first preset time threshold. The control module is also used to reduce the throttle opening when the vehicle is in the idle running mode, so as to use the vacuum degree of the intake manifold to introduce water vapor into the cylinder. As a result, the device can alleviate the oil emulsification tendency of the hydrogen internal combustion engine, effectively improve the spark plug icing in the low temperature environment in winter, and improve the performance of the hydrogen internal combustion engine vehicle.

[0024] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a flow chart of a control method of a hydrogen internal combustion engine system according to an embodiment of the present application;

[0026] Figure 2 is a flow chart of a control method of a hydrogen internal combustion engine system according to a specific example of the present application;

[0027] Figure 3 is a block diagram of a vehicle according to an embodiment of the present application;

[0028] Figure 4 4 is a block diagram of a control device for a hydrogen internal combustion engine system according to an embodiment of the present application. DETAILED DESCRIPTION

[0029] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0030] At present, in order to deal with the saturated water vapor accumulated in the lubrication system (oil pan, valve cover) and cylinder during the operation of hydrogen internal combustion engines, during the next start-up process, the starter is first used to drag the engine to idle for a certain period of time, and the spark plugs are frequently ignited to remove the accumulated saturated water vapor and possible spark plug icing, thereby improving the starting performance of the hydrogen internal combustion engine. However, during the operation of the hydrogen internal combustion engine, the saturated water vapor accumulated in the lubrication system (oil pan, valve cover) and cylinder will gradually condense into liquid water during the shutdown process and mix into the engine oil, resulting in an increased risk of engine oil emulsification. At the same time, the saturated water vapor in the cylinder will also freeze at the spark plug electrode in a low temperature environment. The above method only handles water vapor and ice during the next start-up process, which cannot fundamentally solve the above problems.

[0031] To this end, the present application proposes a control method for a hydrogen internal combustion engine system. When a hydrogen internal combustion engine shutdown command is received, the actual operating time of the hydrogen internal combustion engine is obtained. When the actual operating time is greater than a first preset time threshold, the vehicle is controlled to enter an idle operation mode. When the vehicle is in the idle operation mode, the throttle opening is reduced and adjusted to utilize the vacuum of the intake manifold to introduce water vapor into the cylinder and eventually discharge it out of the cylinder. When the operating time of the vehicle in the idle operation mode is greater than a second preset time threshold, the hydrogen internal combustion engine can be controlled to shut down, thereby actively and effectively alleviating or improving the oil emulsification tendency of the hydrogen internal combustion engine. The idle control mode before the hydrogen internal combustion engine is shut down can effectively reduce the water vapor content in the lubricating oil system and the cylinder, can effectively improve the spark plug icing in low temperature environments in winter, and improve the performance of hydrogen internal combustion engine vehicles.

[0032] The following describes a control method for a hydrogen internal combustion engine system, a computer-readable storage medium, a vehicle, and a control device for a hydrogen internal combustion engine system proposed in embodiments of the present application with reference to the accompanying drawings.

[0033] Figure 1 Flow chart of a control method of a hydrogen internal combustion engine system according to an embodiment of the present application.

[0034] like Figure 1 As shown, the control method of the hydrogen internal combustion engine system of the embodiment of the present application may include the following steps:

[0035] S1, when receiving a hydrogen internal combustion engine shutdown instruction, obtaining the actual running time of the hydrogen internal combustion engine.

[0036] S2, when the actual running time is longer than a first preset time threshold, controlling the vehicle to enter an idle running mode, wherein the first preset time threshold may be determined according to actual conditions.

[0037] S3, when the vehicle is in the idle running mode, the throttle opening is reduced and adjusted to introduce water vapor into the cylinder by utilizing the vacuum of the intake manifold.

[0038] Specifically, receiving a shutdown command of a hydrogen internal combustion engine means that the control system (such as the engine control unit of the vehicle) receives a signal or command, which indicates that the hydrogen internal combustion engine needs to stop running, and the command can come from a variety of sources, for example, it can be operated by the driver, that is, the driver directly issues a shutdown command through the vehicle's control interface (such as a button or switch or key), or through an automatic control system, that is, the vehicle's automatic control system (such as a hybrid power control unit) automatically issues a shutdown command according to the vehicle's operating status and driving conditions. When the shutdown command of the hydrogen internal combustion engine is received, the actual operating time of the hydrogen internal combustion engine can be obtained. For example, the actual operating time of the hydrogen internal combustion engine can be obtained by querying the operating log or real-time monitoring data of the hydrogen internal combustion engine.

[0039] The actual running time of the hydrogen internal combustion engine is obtained to determine whether the hydrogen internal combustion engine has been running for a sufficient time to determine whether a specific pre-shutdown processing step needs to be performed. That is, the size relationship between the actual running time and the first preset time threshold is judged. When the actual running time is greater than the first preset time threshold, it means that a large amount of water vapor is generated during the operation of the current hydrogen internal combustion engine. These water vapors may condense into liquid water in the cylinder after shutdown. If the running time is short, the amount of water vapor in the cylinder and the lubrication system may be small, which is not enough to cause the problem of oil emulsification. That is to say, when the hydrogen internal combustion engine runs for a long time, the amount of water vapor accumulated in the cylinder and the lubrication system increases, increasing the risk of oil emulsification, and oil emulsification will reduce the lubrication performance of the oil and affect the normal operation and life of the engine. Therefore, the vehicle can be controlled to enter the idle running mode. For example, the engine can be adjusted to the idle state by sending an instruction to the engine control unit, and the engine will continue to run and maintain a low speed. Through the idle running mode, the water vapor content in the cylinder and the lubrication system is reduced to reduce the risk of oil emulsification.

[0040] When the vehicle is in idle operation mode, the throttle opening can be adjusted to reduce the water vapor into the cylinder by using the vacuum of the intake manifold. That is to say, the throttle opening is reduced to utilize the vacuum generated by the intake manifold by changing the intake amount. This vacuum can help introduce the mixture of water vapor and oil water vapor in the crankcase and the valve cover into the combustion chamber. In the combustion chamber, these mixed gases containing water vapor and oil water vapor are mixed with fuel and ignited to participate in the combustion process. The exhaust gas generated after combustion, including unburned water vapor and oil water vapor, is discharged out of the cylinder through the exhaust system, that is, after the combustion and exhaust process, it can be finally discharged out of the cylinder, thereby reducing the impact of water vapor on the oil. In this way, the risk of oil emulsification can be reduced and preparation for the next shutdown operation can be prepared. In addition, it can also be equipped with a sensor for real-time monitoring of the water vapor content in the cylinder and the lubrication system to adaptively adjust the duration of the idle control mode and the throttle opening according to the monitoring results.

[0041] This can alleviate the oil emulsification tendency of hydrogen internal combustion engines, effectively improve the spark plug icing in low temperature environments in winter, and enhance the performance of hydrogen internal combustion engine vehicles.

[0042] According to an embodiment of the present application, the throttle opening is reduced by adjusting the throttle opening, including: controlling the throttle opening to decrease to a first preset opening; or decreasing the throttle opening at a first preset rate. The first preset opening and the first preset rate can be determined according to actual conditions.

[0043] Specifically, when adjusting the throttle opening, the throttle opening can be controlled to be reduced to a first preset opening. For example, by sending a command to the engine control unit, the position of the throttle is adjusted to reach the first preset opening. The throttle opening is expressed as a percentage, 100% represents the throttle is fully open, and a smaller percentage represents that the throttle is close to the closed state. For example, the first preset opening can be 3% or 5%. That is, by reducing the throttle opening, the intake volume can be reduced, and at the same time, the vacuum degree of the intake manifold is used to introduce the mixture containing water vapor and oil vapor in the crankcase and the valve chamber cover into the combustion chamber, and finally discharged to the outside of the cylinder. Among them, the first preset opening value can be adjusted according to the specific model, operating state and environmental conditions (such as temperature and humidity) of the engine to ensure the effectiveness of the idle control mode and the stability of the engine.

[0044] Alternatively, when adjusting the throttle opening, the throttle opening can be reduced at a first preset rate. For example, the throttle opening is gradually reduced at a first preset rate, and the rate can be linear or nonlinear, depending on the control strategy of the engine control unit. Reducing the throttle opening at the first preset rate can avoid a sharp change in the engine speed, reduce the impact on the engine and the vehicle, and ensure a smooth transition of the idle control mode. Among them, the first preset rate can be adjusted according to the response characteristics of the engine, driving conditions and environmental factors to achieve the best idle control effect. In addition, in the process of adjusting the throttle opening, the operating status of the engine, such as speed, load, temperature, etc., can also be monitored in real time to ensure the safety and effectiveness of the adjustment process.

[0045] As a result, the water vapor content in the cylinder and the lubrication system can be effectively reduced, the risk of oil emulsification can be reduced, and the low-temperature starting performance of hydrogen internal combustion engine vehicles can be improved.

[0046] According to one embodiment of the present application, the control method of the hydrogen internal combustion engine system further includes: when the running time of the vehicle in the idle running mode is greater than the second preset time threshold, controlling the hydrogen internal combustion engine to shut down. The second preset time threshold can be determined according to actual conditions, for example, the second preset time threshold can be 3 minutes.

[0047] Specifically, by setting the second preset time threshold, it can be ensured that the idle operation mode lasts for a sufficient time, so as to effectively introduce the mixed gas containing water vapor and oil vapor in the crankcase and the valve chamber cover into the combustion chamber, and finally discharge it outside the cylinder, thereby reducing the risk of oil emulsification. That is to say, the size relationship between the running time of the vehicle in the idle operation mode and the second preset time threshold is compared. When the running time of the vehicle in the idle operation mode is greater than the second preset time threshold, it means that the vehicle has achieved the expected effect in the idle operation mode, that is, reducing oil emulsification and water vapor condensation in the cylinder, so that the hydrogen internal combustion engine can be controlled to stop supplying hydrogen. Among them, the second preset time threshold can be determined based on experimental data and historical operation data to ensure that the idle control mode can effectively reduce the risk of oil emulsification and water vapor condensation in the cylinder. Or the second preset time threshold can be adjusted according to environmental conditions (such as temperature, humidity) and operating conditions (such as load, speed) to adapt to different operating conditions.

[0048] In this way, the shutdown of the hydrogen internal combustion engine can be safely and effectively controlled while ensuring that the idle operation mode achieves the expected effect, so as to improve the reliability and performance of the hydrogen internal combustion engine system.

[0049] According to one embodiment of the present application, after controlling the hydrogen internal combustion engine to shut down, the control method of the hydrogen internal combustion engine system further includes: controlling the throttle opening to increase to a second preset opening, or controlling the throttle opening to increase to a second preset opening at a second preset rate. The second preset opening and the second preset rate may be determined according to actual conditions.

[0050] Specifically, after the hydrogen internal combustion engine is shut down, the throttle opening can be controlled to increase to a second preset opening, or the throttle opening can be controlled to increase to a second preset opening at a second preset rate. That is to say, by increasing the throttle opening, before the speed drops to zero, the suction effect of the intake air can be used to discharge the saturated water vapor remaining in the cylinder, reducing the risk of water vapor condensing into liquid water in the cylinder and the risk of engine oil emulsification. In addition, in a low temperature environment, discharging water vapor in the cylinder can reduce the possibility of spark plug icing, thereby improving cold start performance, avoiding engine damage caused by water vapor condensation, and extending the service life of the engine.

[0051] Among them, the second preset opening and the second preset rate can be determined based on experimental data and historical operating data to ensure that the residual water vapor in the cylinder can be effectively discharged, or the second preset opening and the second preset rate can be adjusted according to environmental conditions (such as temperature, humidity) and operating conditions (such as load, speed) to adapt to different operating conditions.

[0052] Therefore, by controlling the throttle opening to increase after the hydrogen internal combustion engine is shut down, the residual water vapor in the cylinder can be effectively discharged, the risk of oil emulsification can be reduced, the cold start performance can be improved, and the engine can be protected.

[0053] According to one embodiment of the present application, the hydrogen internal combustion engine system includes a hybrid hydrogen internal combustion engine system. After the hydrogen internal combustion engine is controlled to shut down, the control method of the hydrogen internal combustion engine system further includes: when the hydrogen internal combustion engine system is a hybrid hydrogen internal combustion engine system, if the hybrid architecture of the vehicle is a target hybrid architecture, then the time for the hydrogen internal combustion engine speed to be reduced to zero is extended. The target hybrid architecture is an architecture in which the motor is directly connected to the hydrogen internal combustion engine.

[0054] Further, according to an embodiment of the present application, in the process of extending the time for the hydrogen internal combustion engine speed to decrease to zero, the control method of the hydrogen internal combustion engine system further includes: controlling the motor to drive the hydrogen internal combustion engine to rotate at a preset speed. The preset speed can be determined according to actual conditions.

[0055] Specifically, the hydrogen internal combustion engine system includes a hybrid hydrogen internal combustion engine system, that is, the hybrid hydrogen internal combustion engine system can use both the mechanical energy generated by the hydrogen internal combustion engine and the electrical energy generated by the electric motor to drive the vehicle. The hybrid system can flexibly use hydrogen fuel and electrical energy according to driving conditions, improve energy efficiency, and reduce emissions. The hybrid architecture may include an architecture in which the motor is not directly connected to the hydrogen internal combustion engine, or an architecture in which the motor is directly connected to the hydrogen internal combustion engine. The current hybrid architecture is judged, and when the hybrid architecture of the vehicle is the target hybrid architecture, the time for the hydrogen internal combustion engine speed to be reduced to zero can be extended. Among them, the target hybrid architecture is an architecture in which the motor is directly connected to the hydrogen internal combustion engine, that is, when the hybrid architecture of the vehicle is the target hybrid architecture, not only can the residual water vapor in the cylinder be discharged by increasing the throttle opening, but since the motor of the target hybrid architecture is directly connected to the hydrogen internal combustion engine, the time for the hydrogen internal combustion engine speed to be reduced to zero can also be extended by controlling the motor to drag the hydrogen internal combustion engine to rotate at a preset speed to accelerate the speed of discharging the residual water vapor in the cylinder. That is to say, in the case of no fuel supply, before the speed of the hydrogen internal combustion engine drops to zero, the engine can be driven to idle by the motor, which can extend the time from hydrogen cut-off to complete stop of the hydrogen internal combustion engine. This extended time allows the hydrogen internal combustion engine to have more time to discharge the saturated water vapor in the cylinder, and the motor can speed up the air circulation speed, so that the saturated water vapor remaining in the cylinder can be discharged faster, significantly reducing the saturated water vapor content in the cylinder. In addition, in a low temperature environment, discharging the water vapor in the cylinder can reduce the possibility of spark plug icing, thereby improving cold start performance, avoiding engine damage caused by water vapor condensation, and extending the service life of the engine.

[0056] Therefore, by controlling the motor to drive the hydrogen internal combustion engine to rotate and increase the throttle opening after the hydrogen internal combustion engine is shut down, the residual water vapor in the cylinder can be effectively discharged, the risk of oil emulsification can be reduced, the cold start performance can be improved, and the engine can be protected.

[0057] According to one embodiment of the present application, the hydrogen internal combustion engine system includes a hybrid hydrogen internal combustion engine system, and the control method of the hydrogen internal combustion engine system also includes: when the hydrogen internal combustion engine system is a hybrid hydrogen internal combustion engine system, if the power system mode of the vehicle is switched from a hybrid mode to a pure electric mode, it is determined that a hydrogen internal combustion engine shutdown command is received; or, when the vehicle is in the process of powering off, it is determined that a hydrogen internal combustion engine shutdown command is received.

[0058] Specifically, when the hydrogen internal combustion engine system is a hybrid hydrogen internal combustion engine system, the operating mode of the vehicle's current power system is judged, and when the vehicle's power system mode is switched from hybrid mode to pure electric mode, it can be determined that a hydrogen internal combustion engine shutdown command has been received. For example, a shutdown command can be automatically generated according to a preset logical judgment. For example, when it is detected that the vehicle battery power is sufficient to support pure electric mode operation, it can be determined to switch to pure electric mode, or the driver can manually choose to switch to pure electric mode through the vehicle's control interface (such as a button or touch screen). After receiving this input, the system will generate a shutdown command, and the hydrogen internal combustion engine will be shut down in time when the mode is switched, which can reduce unnecessary emissions and improve the environmental protection performance of the vehicle. After receiving the hydrogen internal combustion engine shutdown command, the throttle opening can be adjusted to use the vacuum of the intake manifold to introduce water vapor into the cylinder, and finally discharge it outside the cylinder, reducing the risk of oil emulsification, so as to ensure that the hydrogen internal combustion engine can be shut down safely and smoothly.

[0059] Alternatively, whether the vehicle is driven by an electric motor and a hydrogen internal combustion engine, or a vehicle driven only by a hydrogen internal combustion engine, the vehicle's power-off signal can also be monitored. For example, the power-off signal can be triggered by the driver's operation, or the vehicle automatically enters the power-off mode. Once it is confirmed that the vehicle is in the power-off process, it can be determined that the hydrogen internal combustion engine shutdown command has been received. Shutting down the hydrogen internal combustion engine when the vehicle is powered off can reduce exhaust emissions, and after receiving the hydrogen internal combustion engine shutdown command, the throttle opening can be adjusted to use the vacuum of the intake manifold to introduce water vapor into the cylinder and eventually discharge it out of the cylinder, reducing the risk of oil emulsification to ensure that the hydrogen internal combustion engine can be shut down safely and smoothly.

[0060] Combine the following Figure 2 To describe the control method of the present application.

[0061] Taking a hydrogen internal combustion engine system including a hybrid hydrogen internal combustion engine system as a specific example, the control method of the hydrogen internal combustion engine system of the present application may include the following steps:

[0062] S101, when the power system mode of the vehicle is switched from the hybrid mode to the pure electric mode or when the vehicle is in the process of powering off, obtaining the actual operating time of the hydrogen internal combustion engine.

[0063] S102, determine whether the actual running time is greater than a first preset time threshold. If yes, execute step S103; if no, execute step S101.

[0064] S103, controlling the vehicle to enter an idle running mode.

[0065] S104, when the vehicle is in an idle running mode, controlling the throttle opening to decrease to a first preset opening, or decreasing the throttle opening at a first preset rate.

[0066] S105, determining whether the vehicle's running time in the idle running mode is greater than a second preset time threshold. If yes, executing step S106; if no, executing step S103.

[0067] S106, controlling the hydrogen internal combustion engine to shut down.

[0068] S107, controlling the throttle opening to increase to a second preset opening, or controlling the throttle opening to increase to the second preset opening at a second preset rate.

[0069] S108, determining whether the hybrid architecture of the vehicle is the target hybrid architecture. If yes, executing step S109; if no, executing step S106.

[0070] S109, controlling the motor to drive the hydrogen internal combustion engine to rotate at a preset speed.

[0071] In summary, according to the control method of the hydrogen internal combustion engine system of the embodiment of the present application, when receiving the shutdown command of the hydrogen internal combustion engine, the actual running time of the hydrogen internal combustion engine is obtained, and when the actual running time is greater than the first preset time threshold, the vehicle is controlled to enter the idle running mode, and when the vehicle is in the idle running mode, the throttle opening is reduced and adjusted to use the vacuum degree of the intake manifold to introduce water vapor into the cylinder. Therefore, the method can alleviate the oil emulsification tendency of the hydrogen internal combustion engine, effectively improve the spark plug icing in the low temperature environment in winter, and improve the performance of the hydrogen internal combustion engine vehicle.

[0072] Corresponding to the above embodiments, the present application also proposes a computer-readable storage medium.

[0073] The computer-readable storage medium of the embodiment of the present application stores a program thereon, and when the program is executed by a processor, the control method of the above-mentioned hydrogen internal combustion engine system is implemented.

[0074] According to the computer-readable storage medium of the embodiment of the present application, by executing the above-mentioned control method of the hydrogen internal combustion engine system, the oil emulsification tendency of the hydrogen internal combustion engine can be alleviated, the spark plug freezing condition in the low temperature environment in winter can be effectively improved, and the performance of the hydrogen internal combustion engine vehicle can be improved.

[0075] Corresponding to the above embodiments, the present application also proposes a vehicle.

[0076] like Figure 3 As shown, the vehicle 200 of the embodiment of the present application may include: a memory 210, a processor 220, and a program stored in the memory 210 and executable on the processor 220. When the processor 220 executes the program, the above-mentioned control method of the hydrogen internal combustion engine system is implemented.

[0077] According to the vehicle of the embodiment of the present application, by executing the above-mentioned control method of the hydrogen internal combustion engine system, the oil emulsification tendency of the hydrogen internal combustion engine can be alleviated, the spark plug freezing condition in the low temperature environment in winter can be effectively improved, and the performance of the hydrogen internal combustion engine vehicle can be improved.

[0078] Corresponding to the above-mentioned embodiments, the present application also proposes a control device for a hydrogen internal combustion engine system.

[0079] like Figure 4 As shown, the control device 100 of the hydrogen internal combustion engine system of the embodiment of the present application includes: an acquisition module 110 and a control module 120 .

[0080] The acquisition module 110 is used to acquire the actual running time of the hydrogen internal combustion engine when receiving the shutdown instruction of the hydrogen internal combustion engine. The control module 120 is used to control the vehicle to enter the idle running mode when the actual running time is greater than the first preset time threshold. The control module 120 is also used to reduce the throttle opening when the vehicle is in the idle running mode, so as to introduce water vapor into the cylinder by using the vacuum degree of the intake manifold.

[0081] According to an embodiment of the present application, the control module 120 adjusts the throttle opening, specifically for: controlling the throttle opening to decrease to a first preset opening; or reducing the throttle opening at a first preset rate.

[0082] According to one embodiment of the present application, the control module 120 is further configured to: control the hydrogen internal combustion engine to shut down when the vehicle is running in the idle mode for a time period greater than a second preset time threshold.

[0083] According to an embodiment of the present application, after controlling the hydrogen internal combustion engine to shut down, the control module 120 is further used to: control the throttle opening to increase to a second preset opening, or control the throttle opening to increase to a second preset opening at a second preset rate.

[0084] According to one embodiment of the present application, the hydrogen internal combustion engine system includes a hybrid hydrogen internal combustion engine system. After controlling the hydrogen internal combustion engine to shut down, the control module 120 is also used to: when the hydrogen internal combustion engine system is a hybrid hydrogen internal combustion engine system, if the hybrid architecture of the vehicle is a target hybrid architecture, then the time for the hydrogen internal combustion engine speed to be reduced to zero is extended; wherein the target hybrid architecture is an architecture in which the motor and the hydrogen internal combustion engine are directly connected.

[0085] According to an embodiment of the present application, in the process of extending the time for the speed of the hydrogen internal combustion engine to decrease to zero, the control module 120 is further used to: control the motor to drive the hydrogen internal combustion engine to rotate at a preset speed.

[0086] According to one embodiment of the present application, the hydrogen internal combustion engine system includes a hybrid hydrogen internal combustion engine system, and the control module 120 is also used to: when the hydrogen internal combustion engine system is a hybrid hydrogen internal combustion engine system, if the power system mode of the vehicle is switched from a hybrid mode to a pure electric mode, determine that a hydrogen internal combustion engine shutdown command is received; or, when the vehicle is in the process of powering off, determine that a hydrogen internal combustion engine shutdown command is received.

[0087] It should be noted that for details not disclosed in the control device of the hydrogen internal combustion engine system of the embodiment of the present application, please refer to the details disclosed in the control method of the hydrogen internal combustion engine system of the embodiment of the present application, and the details will not be repeated here.

[0088] According to the control device of the hydrogen internal combustion engine system of the embodiment of the present application, the acquisition module is used to obtain the actual running time of the hydrogen internal combustion engine when receiving the shutdown command of the hydrogen internal combustion engine, and the control module is used to control the vehicle to enter the idle running mode when the actual running time is greater than the first preset time threshold. The control module is also used to reduce the throttle opening when the vehicle is in the idle running mode, so as to use the vacuum degree of the intake manifold to introduce water vapor into the cylinder. As a result, the device can alleviate the oil emulsification tendency of the hydrogen internal combustion engine, effectively improve the spark plug icing in the low temperature environment in winter, and improve the performance of the hydrogen internal combustion engine vehicle.

[0089] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection portion with one or more wirings (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0090] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0091] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0092] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0093] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0094] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A control method for a hydrogen internal combustion engine system, characterized in that: The method comprises: When receiving a hydrogen internal combustion engine shutdown instruction, obtaining the actual running time of the hydrogen internal combustion engine; When the actual running time is greater than a first preset time threshold, controlling the vehicle to enter an idle running mode; When the vehicle is in the idle operation mode, the throttle opening is adjusted to decrease so as to introduce water vapor into the cylinder by utilizing the vacuum of the intake manifold.

2. The control method of the hydrogen internal combustion engine system according to claim 1, characterized in that: Reduce the throttle opening, including: Controlling the throttle opening to decrease to a first preset opening; or The throttle opening is reduced at a first preset rate.

3. The control method of the hydrogen internal combustion engine system according to claim 1, characterized in that: The method further comprises: When the vehicle is operated in the idle operation mode for a period of time greater than a second preset time threshold, the hydrogen internal combustion engine is controlled to be shut down.

4. The control method of the hydrogen internal combustion engine system according to claim 3, characterized in that: After controlling the hydrogen internal combustion engine to shut down, the method further includes: The throttle opening is controlled to increase to a second preset opening, or the throttle opening is controlled to increase to the second preset opening at a second preset rate.

5. The control method of the hydrogen internal combustion engine system according to claim 3, characterized in that: The hydrogen internal combustion engine system includes a hybrid hydrogen internal combustion engine system. After controlling the hydrogen internal combustion engine to shut down, the method further includes: In the case where the hydrogen internal combustion engine system is a hybrid hydrogen internal combustion engine system, if the hybrid architecture of the vehicle is a target hybrid architecture, extending the time for the speed of the hydrogen internal combustion engine to decrease to zero; Among them, the target hybrid architecture is an architecture in which the motor is directly connected to the hydrogen internal combustion engine.

6. The control method of the hydrogen internal combustion engine system according to claim 5, characterized in that: In the process of extending the time for the speed of the hydrogen internal combustion engine to decrease to zero, the method further comprises: The motor is controlled to drive the hydrogen internal combustion engine to rotate at a preset speed.

7. The control method of the hydrogen internal combustion engine system according to claim 1, characterized in that: The hydrogen internal combustion engine system includes a hybrid hydrogen internal combustion engine system, and the method further includes: In the case where the hydrogen internal combustion engine system is a hybrid hydrogen internal combustion engine system, if the power system mode of the vehicle is switched from a hybrid mode to a pure electric mode, it is determined that a hydrogen internal combustion engine shutdown instruction is received; or, When the vehicle is in a power-off process, it is determined that a hydrogen internal combustion engine shutdown instruction is received.

8. A computer-readable storage medium, characterized in that: A program is stored thereon, and when the program is executed by a processor, the control method of the hydrogen internal combustion engine system according to any one of claims 1 to 7 is implemented.

9. A vehicle, characterized in that: include: A memory, a processor, and a program stored in the memory and executable on the processor, wherein when the processor executes the program, the control method for the hydrogen internal combustion engine system according to any one of claims 1 to 7 is implemented.

10. A control device for a hydrogen internal combustion engine system, characterized in that: The device comprises: An acquisition module, used for acquiring the actual running time of the hydrogen internal combustion engine when receiving a shutdown instruction of the hydrogen internal combustion engine; A control module, configured to control the vehicle to enter an idle running mode when the actual running time is longer than a first preset time threshold; The control module is further used to reduce the throttle opening when the vehicle is in the idle operation mode, so as to introduce water vapor into the cylinder by utilizing the vacuum of the intake manifold.

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