Control method and device for crankcase air supply system of hydrogen energy engine and vehicle

Abstract

The invention discloses a control method and device for a crankcase air supply system of a hydrogen energy engine and a vehicle, and relates to the technical field of vehicles. The method comprises the steps that the load of the hydrogen energy engine and the hydrogen concentration in a crankcase are obtained; under the condition that the load of the hydrogen energy engine is larger than or equal to a first load threshold value, the air supply amount of the crankcase is determined according to the load of the hydrogen energy engine, the hydrogen concentration in the crankcase and the air leakage amount of the hydrogen energy engine; the opening degree of the electromagnetic valve is determined according to the air supply amount and the pressure value of the supercharger; and controlling the electromagnetic valve according to the opening degree of the electromagnetic valve so as to remove moisture in the crankcase. Therefore, moisture in the crankcase can be removed, the problem of engine oil emulsification caused by high moisture in the crankcase of the hydrogen engine can be avoided to a certain extent, and then the safety of an engine lubricating system is guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and in particular to a control method for a crankcase air replenishment system of a hydrogen engine, a control device for a crankcase air replenishment system of a hydrogen engine, a computer-readable storage medium and a vehicle. Background Art

[0002] When the engine produces the same amount of energy, the water produced by hydrogen combustion is twice that of fuel, so how to remove water from the crankcase ventilation system to ensure that the engine oil is not diluted has become one of the new problems faced in the development of hydrogen engines. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the first purpose of the present invention is to propose a control method for a crankcase air replenishment system of a hydrogen engine, the crankcase air replenishment system of the hydrogen engine includes an intake manifold, a supercharger arranged at the inlet of the intake manifold, a solenoid valve, and an air replenishment pipeline connecting the intake manifold and the solenoid valve, the solenoid valve is configured to adjust the amount of gas entering the engine, and the supercharger is configured to increase the gas pressure entering the intake manifold, and the method includes: obtaining the hydrogen engine load and the hydrogen concentration in the crankcase; when the hydrogen engine load is greater than or equal to the first load threshold, determining the air replenishment amount of the crankcase according to the hydrogen engine load, the hydrogen concentration in the crankcase and the leakage amount of the hydrogen engine; determining the opening of the solenoid valve according to the air replenishment amount and the pressure value of the supercharger; and controlling the solenoid valve according to the opening of the solenoid valve to remove the moisture in the crankcase. In this way, the moisture in the crankcase can be removed, and the problem of oil emulsification caused by high moisture in the crankcase of the hydrogen engine can be avoided to a certain extent, thereby ensuring the safety of the engine lubrication system.

[0004] The second object of the present invention is to provide a control device for the crankcase air replenishment system of a hydrogen engine.

[0005] A third object of the present invention is to provide a computer-readable storage medium.

[0006] A fourth object of the present invention is to provide a vehicle.

[0007] To achieve the above-mentioned purpose, the first embodiment of the present invention proposes a control method for a crankcase air replenishment system of a hydrogen engine. The crankcase air replenishment system of the hydrogen engine includes an intake manifold, a supercharger arranged at the inlet of the intake manifold, a solenoid valve, and an air replenishment pipeline connecting the intake manifold and the solenoid valve. The solenoid valve is configured to adjust the amount of gas entering the engine, and the supercharger is configured to increase the pressure of the gas entering the intake manifold. The method includes: obtaining the load of the hydrogen engine and the hydrogen concentration in the crankcase; when the load of the hydrogen engine is greater than or equal to a first load threshold, determining the air replenishment amount of the crankcase according to the load of the hydrogen engine, the hydrogen concentration in the crankcase and the leakage amount of the hydrogen engine; determining the opening of the solenoid valve according to the air replenishment amount and the pressure value of the supercharger; and controlling the solenoid valve according to the opening of the solenoid valve to remove moisture in the crankcase.

[0008] According to one embodiment of the present invention, the amount of air replenishment for the crankcase is determined based on the load of the hydrogen engine, the hydrogen concentration in the crankcase and the amount of gas leakage in the hydrogen engine, including: when the load of the hydrogen engine is greater than or equal to a first load threshold and less than a second load threshold, and the hydrogen concentration in the crankcase is less than or equal to the first hydrogen concentration threshold, determining the amount of air replenishment as the product of the gas leakage amount and a first coefficient.

[0009] According to one embodiment of the present invention, the amount of air replenishment for the crankcase is determined based on the load of the hydrogen engine, the hydrogen concentration in the crankcase and the amount of gas leakage in the hydrogen engine, including: when the load of the hydrogen engine is greater than or equal to a first load threshold and less than a second load threshold, and the hydrogen concentration in the crankcase is greater than the first hydrogen concentration threshold and less than or equal to the second hydrogen concentration threshold, determining the amount of air replenishment as the product of the gas leakage amount and a second coefficient; wherein the first coefficient is less than the second coefficient.

[0010] According to one embodiment of the present invention, the amount of air replenishment for the crankcase is determined based on the load of the hydrogen engine, the hydrogen concentration in the crankcase and the amount of gas leakage of the hydrogen engine, including: when the load of the hydrogen engine is greater than or equal to a second load threshold and the hydrogen concentration in the crankcase is less than or equal to a first hydrogen concentration threshold, determining the amount of air replenishment as the product of the gas leakage amount and a third coefficient.

[0011] According to one embodiment of the present invention, the amount of air replenishment of the crankcase is determined according to the load of the hydrogen engine, the hydrogen concentration in the crankcase and the gas leakage of the hydrogen engine, including:

[0012] When the load of the hydrogen engine is greater than or equal to the second load threshold and the hydrogen concentration in the crankcase is greater than the first hydrogen concentration threshold and less than or equal to the second hydrogen concentration threshold, the air replenishment amount is determined as the product of the leakage amount and the fourth coefficient; wherein the third coefficient is less than the fourth coefficient.

[0013] According to one embodiment of the present invention, the above-mentioned control method also includes: when the water outlet temperature of the hydrogen engine is less than or equal to a first preset temperature and the cumulative running time of the hydrogen engine is greater than a first preset time, controlling the hydrogen engine to run until the water outlet temperature of the hydrogen engine is greater than or equal to a preset second preset temperature and continues to run for a second preset time, and determining the air replenishment amount as the product of the leakage amount and the fifth coefficient.

[0014] According to an embodiment of the present invention, the control method further comprises: issuing an alarm when the hydrogen concentration in the crankcase obtained within a preset number of consecutive times is greater than a second hydrogen concentration threshold.

[0015] To achieve the above-mentioned purpose, the second embodiment of the present invention proposes a control device for a crankcase air replenishment system of a hydrogen engine. The crankcase air replenishment system of the hydrogen engine includes an intake manifold, a supercharger arranged at the inlet of the intake manifold, a solenoid valve, and an air replenishment pipeline connecting the intake manifold and the solenoid valve. The solenoid valve is configured to adjust the amount of gas entering the engine, and the supercharger is configured to increase the pressure of the gas entering the intake manifold. The device includes: an acquisition module, which is used to obtain the load of the hydrogen engine and the hydrogen concentration in the crankcase; a first determination module, which is used to determine the crankcase air replenishment amount according to the hydrogen engine load, the hydrogen concentration in the crankcase and the leakage amount of the hydrogen engine when the hydrogen engine load is greater than or equal to a first load threshold; a second determination module, which is used to determine the opening of the solenoid valve according to the air replenishment amount and the pressure value of the supercharger; a control module, which is used to control the solenoid valve according to the opening of the solenoid valve to remove moisture in the crankcase.

[0016] To achieve the above-mentioned purpose, the third aspect of the present invention proposes a computer-readable storage medium, on which a control program of the crankcase air supply system of a hydrogen engine is stored. When the control program of the crankcase air supply system of the hydrogen engine is executed by a processor, the control method of the crankcase air supply system of the hydrogen engine mentioned above is implemented.

[0017] To achieve the above-mentioned objectives, a fourth aspect of the present invention proposes a vehicle, comprising a memory, a processor, and a control program for a crankcase air replenishment system of a hydrogen engine stored in the memory and executable on the processor. When the processor executes the control program for the crankcase air replenishment system of the hydrogen engine, the aforementioned control method for the crankcase air replenishment system of the hydrogen engine is implemented.

[0018] According to the control method, device and vehicle of the crankcase air replenishment system of the hydrogen engine of the embodiment of the present invention, the crankcase air replenishment system of the hydrogen engine includes an intake manifold, a supercharger arranged at the inlet of the intake manifold, a solenoid valve and an air replenishment pipeline connecting the intake manifold and the solenoid valve, the solenoid valve is configured to adjust the amount of gas entering the engine, and the supercharger is configured to increase the pressure of the gas entering the intake manifold. The method includes: obtaining the hydrogen engine load and the hydrogen concentration in the crankcase; when the hydrogen engine load is greater than or equal to the first load threshold, determining the air replenishment amount of the crankcase according to the hydrogen engine load, the hydrogen concentration in the crankcase and the leakage amount of the hydrogen engine; determining the opening of the solenoid valve according to the air replenishment amount and the pressure value of the supercharger; and controlling the solenoid valve according to the opening of the solenoid valve to remove the moisture in the crankcase. In this way, the moisture in the crankcase can be removed, and the problem of oil emulsification caused by high moisture in the crankcase of the hydrogen engine can be avoided to a certain extent, thereby ensuring the safety of the engine lubrication system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of a crankcase air supply system of a hydrogen engine according to some embodiments of the present invention;

[0020] Figure 2 A flowchart of a method for controlling a crankcase air supply system of a hydrogen engine according to some embodiments of the present invention;

[0021] Figure 3 A flow chart of a control method of a crankcase air supply system of a hydrogen engine according to other embodiments of the present invention;

[0022] Figure 4 A block diagram of a control device for a crankcase air supplementation system of a hydrogen engine according to some embodiments of the present invention;

[0023] Figure 5 is a block diagram of a vehicle according to some embodiments of the present invention. DETAILED DESCRIPTION

[0024] Embodiments of the present invention are described in detail below, examples of which 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 invention, and should not be construed as limiting the present invention.

[0025] The control method, device and vehicle of the crankcase air replenishment system of the hydrogen engine according to the embodiment of the present invention are described in detail below with reference to the accompanying drawings.

[0026] In some embodiments, reference Figure 1The crankcase air supply system of the hydrogen engine includes an intake manifold 4, a supercharger 6 arranged at the inlet of the intake manifold, a solenoid valve 3 and an air supply pipeline 10 connecting the intake manifold and the solenoid valve. The solenoid valve 3 is configured to adjust the amount of gas entering the engine, and the supercharger 6 is configured to increase the gas pressure entering the intake manifold 4.

[0027] Specifically, refer to Figure 1 , the gas in the crankcase 2 is separated by the active oil-gas separator 9 and enters the pipeline between the air filter 7 and the supercharger 6, and re-participates in the combustion through the intake manifold 4. The active oil-gas separator 9 can control the crankcase pressure by adjusting the speed. The higher the speed, the greater the negative pressure of the crankcase pressure. The hydrogen concentration sensor 1 monitors the hydrogen concentration in the crankcase in real time. The intake temperature and pressure sensor 5 monitors the gas pressure in the intake manifold in real time. The one-way valve 8 controls the gas to flow only in one direction from the air filter to the engine through a mechanical structure. The solenoid valve 3 is controlled by the ECU (Electronic Control Unit) to control the gas connection area between the intake manifold and the engine. The air supply port is located on the upper cover at the top of the engine. When supplying air, fresh air will enter the air supply port through the air supply pipeline 10, and then the fresh air will be heated inside the engine (such as the combustion chamber) before entering the crankcase to take away the moisture in the crankcase 4.

[0028] Figure 2 The figure is a flow chart of a control method of a crankcase air supplementation system of a hydrogen engine according to some embodiments of the present invention.

[0029] Reference Figure 2 The control method of the crankcase air filling system of the hydrogen engine of the embodiment of the present application may include the following steps:

[0030] S110, obtaining the load of the hydrogen engine and the hydrogen concentration in the crankcase.

[0031] Specifically, the hydrogen concentration in the crankcase can be detected and obtained by a hydrogen concentration sensor installed in the crankcase, and the hydrogen engine load can be calculated and obtained by collecting the pressure in the engine combustion chamber, the hydrogen supply, the temperature of the combustion chamber and the engine speed, wherein the pressure in the engine combustion chamber is collected by a pressure sensor, the hydrogen supply is collected by a flow meter, the temperature of the combustion chamber is collected by a temperature sensor, and the engine speed is collected by a speed sensor. The specific method of obtaining the hydrogen engine load and the hydrogen concentration in the crankcase is not specifically limited here.

[0032] S120, when the load of the hydrogen engine is greater than or equal to the first load threshold, determine the amount of air replenishment for the crankcase according to the load of the hydrogen engine, the hydrogen concentration in the crankcase, and the amount of gas leakage of the hydrogen engine. The first load threshold can be determined according to actual conditions, for example, the first load threshold can be 12 bar, and no specific limit is given here.

[0033] Specifically, when the load of the hydrogen engine is greater than or equal to the first load threshold, the hydrogen engine needs to be forcibly replenished with air, and when the load of the hydrogen engine is less than the first load threshold, other replenishment methods can be used to replenish the hydrogen engine, such as natural replenishment, and the specific replenishment method is not specifically limited here. When the hydrogen engine is forcibly replenished with air, as the load of the hydrogen engine increases, the leakage of the hydrogen engine will also increase, but the amount of gas passing through the oil-gas separator is fixed, so the amount of replenishment needs to be reduced accordingly. In addition, since the hydrogen concentration in the crankcase is high, it is easy to explode. Therefore, when the hydrogen concentration in the crankcase is relatively small, the amount of replenishment can be appropriately reduced, and when the hydrogen concentration in the crankcase is high, the amount of replenishment can be increased to reduce the hydrogen concentration in the crankcase and avoid explosion to a certain extent. In other words, the amount of air replenishment in the crankcase needs to be determined based on the load of the hydrogen engine, the hydrogen concentration in the crankcase, and the leakage of the hydrogen engine.

[0034] S130, determining the opening of the solenoid valve according to the air supply volume and the pressure value of the supercharger.

[0035] Specifically, after the air supply amount is determined, the opening of the solenoid valve needs to be determined in combination with the pressure value of the supercharger. For example, the opening of the solenoid valve can be obtained by querying a multidimensional mapping table between the air supply amount, the pressure value of the supercharger and the opening of the solenoid valve, wherein the multidimensional mapping table includes multiple air supply amounts and pressure values ​​and the opening of the solenoid valve corresponding to each set of air supply amounts and pressure values.

[0036] S140, controlling the solenoid valve according to the opening of the solenoid valve to remove moisture in the crankcase.

[0037] In this way, the moisture in the crankcase can be removed, which can avoid the oil emulsification problem caused by high moisture in the crankcase of the hydrogen engine to a certain extent, thereby ensuring the safety of the engine lubrication system; in addition, while removing the moisture in the crankcase, the hydrogen concentration in the crankcase can also be reduced, which can avoid explosion to a certain extent.

[0038] In some embodiments, the amount of air replenishment in the crankcase is determined according to the load of the hydrogen engine, the hydrogen concentration in the crankcase, and the leakage of the hydrogen engine, including: when the load of the hydrogen engine is greater than or equal to the first load threshold and less than the second load threshold, and the hydrogen concentration in the crankcase is less than or equal to the first hydrogen concentration threshold, the amount of air replenishment is determined as the product of the leakage amount and the first coefficient. The second load threshold, the first hydrogen concentration threshold and the second load threshold are determined according to actual conditions, for example, the second load threshold can be 18 bar, and the first hydrogen concentration threshold can be 2.5%, and no specific limit is given here.

[0039] Exemplarily, when the load of the hydrogen engine is greater than or equal to a first load threshold (e.g., 12 bar) and less than a second load threshold (e.g., 18 bar), and the hydrogen concentration in the crankcase is less than or equal to a first hydrogen concentration threshold (e.g., 2.5%), the calculation formula for the crankcase air replenishment amount is as follows:

[0040] Crankcase air replenishment amount = leakage amount × first coefficient

[0041] The first coefficient may be determined according to actual conditions. For example, the first coefficient may be 1.5, and no specific limitation is made here.

[0042] In some embodiments, the amount of air replenishment in the crankcase is determined according to the load of the hydrogen engine, the hydrogen concentration in the crankcase, and the leakage of the hydrogen engine, including: when the load of the hydrogen engine is greater than or equal to the first load threshold and less than the second load threshold, and the hydrogen concentration in the crankcase is greater than the first hydrogen concentration threshold and less than or equal to the second hydrogen concentration threshold, the amount of air replenishment is determined to be the product of the leakage amount and the second coefficient; wherein the first coefficient is less than the second coefficient. The second hydrogen concentration threshold can be determined according to actual conditions, for example, the second hydrogen concentration threshold can be 3.5%, and no specific limit is made here.

[0043] Exemplarily, when the load of the hydrogen engine is greater than or equal to a first load threshold (e.g., 12 bar) and less than a second load threshold (e.g., 18 bar), and the hydrogen concentration in the crankcase is greater than a first hydrogen concentration threshold (e.g., 2.5%) and less than or equal to a second hydrogen concentration threshold (e.g., 3.5%), the calculation formula for the crankcase air replenishment amount is as follows:

[0044] Crankcase air replenishment amount = leakage amount × second coefficient

[0045] The second coefficient may be determined according to actual conditions. For example, the second coefficient may be 2, and no specific limitation is made here.

[0046] It should be noted that since explosion is prone to occur when the hydrogen concentration in the crankcase is high, the amount of supplementary air can be appropriately reduced when the hydrogen concentration in the crankcase is relatively low, and the amount of supplementary air can be increased when the hydrogen concentration in the crankcase is high. Therefore, the first coefficient is smaller than the second coefficient.

[0047] In some embodiments, the amount of air replenishment for the crankcase is determined based on the load of the hydrogen engine, the hydrogen concentration in the crankcase, and the amount of gas leakage of the hydrogen engine, including: when the load of the hydrogen engine is greater than or equal to a second load threshold and the hydrogen concentration in the crankcase is less than or equal to a first hydrogen concentration threshold, determining the amount of air replenishment as the product of the gas leakage amount and a third coefficient.

[0048] Exemplarily, when the load of the hydrogen engine is greater than or equal to the second load threshold (e.g., 18 bar), and the hydrogen concentration in the crankcase is less than or equal to the first hydrogen concentration threshold (e.g., 2.5%), the calculation formula for the crankcase air replenishment amount is as follows:

[0049] The amount of air added to the crankcase = the amount of air leakage × the third coefficient

[0050] The third coefficient may be determined according to actual conditions. For example, the third coefficient may be 1, and no specific limitation is made here.

[0051] In some embodiments, the amount of air replenishment for the crankcase is determined based on the load of the hydrogen engine, the hydrogen concentration in the crankcase, and the amount of gas leakage in the hydrogen engine, including: when the load of the hydrogen engine is greater than or equal to a second load threshold, and the hydrogen concentration in the crankcase is greater than a first hydrogen concentration threshold and less than or equal to a second hydrogen concentration threshold, determining the amount of air replenishment as the product of the gas leakage amount and a fourth coefficient; wherein the third coefficient is less than the fourth coefficient.

[0052] Exemplarily, when the load of the hydrogen engine is greater than or equal to the second load threshold (e.g., 18 bar), and the hydrogen concentration in the crankcase is greater than the first hydrogen concentration threshold (e.g., 2.5%) and less than or equal to the second hydrogen concentration threshold (e.g., 3.5%), the calculation formula for the crankcase air replenishment amount is as follows:

[0053] The amount of air added to the crankcase = the amount of air leakage × the fourth coefficient

[0054] The fourth coefficient may be determined according to actual conditions. For example, the fourth coefficient may be 1.2, and no specific limitation is made here.

[0055] It should be noted that since explosion is prone to occur when the hydrogen concentration in the crankcase is high, the amount of supplementary air can be appropriately reduced when the hydrogen concentration in the crankcase is relatively low, and the amount of supplementary air can be increased when the hydrogen concentration in the crankcase is high. Therefore, the third coefficient is smaller than the fourth coefficient.

[0056] It should be noted that when the hydrogen engine is forcibly replenished with air, as the load of the hydrogen engine increases, the leakage of the hydrogen engine will also increase accordingly, but the amount of gas passing through the oil-gas separator is fixed, so the amount of air replenishment needs to be reduced accordingly. Therefore, the first coefficient and the second coefficient should be greater than the third coefficient and the fourth coefficient.

[0057] In some embodiments, the control method further includes: when the outlet water temperature of the hydrogen engine is less than or equal to the first preset temperature and the cumulative running time of the hydrogen engine is greater than the first preset time, controlling the hydrogen engine to run until the outlet water temperature of the hydrogen engine is greater than or equal to the preset second preset temperature and continues to run for the second preset time, and determining the air replenishment amount as the product of the leakage amount and the fifth coefficient. The first preset temperature and the second preset temperature can be determined according to actual conditions, for example, the first preset temperature can be 60°C, and the second preset temperature can be 80°C, and the first preset time and the second preset time can be determined according to actual conditions, for example, the first preset time can be 2h, and the second preset time can be 10min.

[0058] Specifically, when the hydrogen engine is running at a lower load, for example, when the vehicle moves slowly for a long time, the water outlet temperature of the hydrogen engine will be low and last for a long time, and the moisture in the crankcase will increase. At this time, it is necessary to increase the load of the hydrogen engine to increase the water outlet temperature, and increase the air supply to quickly discharge the moisture in the crankcase. Therefore, when the water outlet temperature of the hydrogen engine is less than or equal to the first preset temperature (for example, 60°C) and the cumulative operation of the hydrogen engine is greater than the first preset time (for example, 1h), it is necessary to control the operation of the hydrogen engine until the water outlet temperature of the hydrogen engine is greater than or equal to the preset second preset temperature (for example, 80°C) and continues to run for the second preset time (for example, 10min), and at the same time determine the calculation formula for the air supply of the crankcase as follows:

[0059] The amount of air added to the crankcase = the amount of air leakage × the fifth coefficient

[0060] The fifth coefficient may be determined according to actual conditions. For example, the fifth coefficient may be 2, and no specific limitation is made here.

[0061] In some embodiments, the control method further includes: when the hydrogen concentration in the crankcase obtained within a preset number of consecutive times is greater than a second hydrogen concentration threshold, an alarm is issued. The preset number of times can be determined according to actual conditions, for example, the preset number of times can be 3 times, which is not specifically limited here.

[0062] Specifically, when the hydrogen concentration in the crankcase is greater than the second hydrogen concentration threshold (for example, 3.5%), there will be a risk of explosion. To improve the accuracy of detection, the hydrogen concentration in the crankcase must be detected to be greater than the second hydrogen concentration threshold for a preset number of times (for example, 3 times) before an alarm is issued. This can ensure the safety of the driver and passengers to a certain extent.

[0063] As a specific example, see Figure 3 The control method of the crankcase air filling system of the hydrogen engine may also include the following steps:

[0064] S201, engine starts.

[0065] S202, determine whether the engine load is greater than or equal to a first load threshold. If yes, execute S204; otherwise, execute S203.

[0066] S203, end.

[0067] S204, determine whether the engine load is greater than or equal to a first load threshold and less than a second load threshold. If yes, execute S205; otherwise, execute S209.

[0068] S205, determining whether the hydrogen concentration in the crankcase is less than or equal to a first hydrogen concentration threshold. If yes, executing S207; otherwise, executing S206.

[0069] S206, determining whether the hydrogen concentration in the crankcase is greater than a first hydrogen concentration threshold and less than or equal to a second hydrogen concentration threshold. If yes, execute S208; otherwise, execute S214.

[0070] S207, air replenishment amount = air leakage amount × first coefficient.

[0071] S208, air replenishment amount = air leakage amount × second coefficient.

[0072] S209, determining whether the engine load is greater than a second load threshold. If yes, executing S210.

[0073] S210, determining whether the hydrogen concentration in the crankcase is less than or equal to a first hydrogen concentration threshold. If yes, executing S212; otherwise, executing S211.

[0074] S211, determine whether the hydrogen concentration in the crankcase is greater than a first hydrogen concentration threshold and less than or equal to a second hydrogen concentration threshold. If yes, execute S213; otherwise, execute S214.

[0075] S212, air replenishment amount = air leakage amount × third coefficient.

[0076] S213, air replenishment amount = air leakage amount × fourth coefficient.

[0077] S214, determining whether the hydrogen concentration in the crankcase obtained within a preset number of consecutive times is greater than a second hydrogen concentration threshold. If yes, executing S215.

[0078] S215, alarm.

[0079] In summary, the control method of the present invention achieves the reliability of moisture and hydrogen concentrations in the crankcase ventilation system of the hydrogen engine under all operating conditions by utilizing the pressure value of the supercharger, the solenoid valve and the ECU intelligent control air supply strategy, thereby ensuring the safe and reliable operation of the engine to a certain extent.

[0080] Corresponding to the above-mentioned embodiment, the present application also proposes a control device for the crankcase air replenishment system of a hydrogen engine.

[0081] In some embodiments, the crankcase air supply system of the hydrogen engine includes: an intake manifold, a supercharger arranged at the inlet of the intake manifold, a solenoid valve, and an air supply pipeline connecting the intake manifold and the solenoid valve, the solenoid valve is configured to adjust the amount of gas entering the engine, and the supercharger is configured to increase the gas pressure entering the intake manifold.

[0082] Reference Figure 4 The control device 400 of the crankcase air replenishment system of the hydrogen engine includes: an acquisition module 410, a first determination module 420, a second determination module 430 and a control module 440.

[0083] Among them, the acquisition module 410 is used to obtain the hydrogen engine load and the hydrogen concentration in the crankcase. The first determination module 420 is used to determine the amount of air replenishment in the crankcase according to the hydrogen engine load, the hydrogen concentration in the crankcase and the amount of gas leakage of the hydrogen engine when the hydrogen engine load is greater than or equal to the first load threshold. The second determination module 430 is used to determine the opening of the solenoid valve according to the amount of air replenishment and the pressure value of the supercharger. The control module 440 is used to control the solenoid valve according to the opening of the solenoid valve to remove moisture in the crankcase.

[0084] According to one embodiment of the present invention, the first determination module 420 is specifically used to determine the supplementary air amount as the product of the leakage amount and the first coefficient when the load of the hydrogen engine is greater than or equal to a first load threshold and less than a second load threshold, and the hydrogen concentration in the crankcase is less than or equal to a first hydrogen concentration threshold.

[0085] According to one embodiment of the present invention, the first determination module 420 is specifically used to determine the air supplement amount as the product of the leakage amount and the second coefficient when the load of the hydrogen engine is greater than or equal to a first load threshold and less than a second load threshold, and the hydrogen concentration in the crankcase is greater than the first hydrogen concentration threshold and less than or equal to the second hydrogen concentration threshold; wherein the first coefficient is less than the second coefficient.

[0086] According to one embodiment of the present invention, the first determination module 420 is specifically used to determine the supplementary air amount as the product of the leakage amount and the third coefficient when the load of the hydrogen engine is greater than or equal to the second load threshold and the hydrogen concentration in the crankcase is less than or equal to the first hydrogen concentration threshold.

[0087] According to one embodiment of the present invention, the first determination module 420 is specifically used to determine the air supplement amount as the product of the leakage amount and the fourth coefficient when the load of the hydrogen engine is greater than or equal to the second load threshold and the hydrogen concentration in the crankcase is greater than the first hydrogen concentration threshold and less than or equal to the second hydrogen concentration threshold; wherein the third coefficient is less than the fourth coefficient.

[0088] According to one embodiment of the present invention, when the outlet water temperature of the hydrogen engine is less than or equal to a first preset temperature and the cumulative running time of the hydrogen engine is greater than a first preset time, the hydrogen engine is controlled to run until the outlet water temperature of the hydrogen engine is greater than or equal to a preset second preset temperature and continues to run for a second preset time, and the air replenishment amount is determined to be the product of the leakage amount and the fifth coefficient.

[0089] According to one embodiment of the present invention, when the hydrogen concentration in the crankcase obtained within a preset number of consecutive times is greater than a second hydrogen concentration threshold, an alarm is issued.

[0090] It should be pointed out that the above-mentioned explanation of the embodiment and beneficial effects of the control method of the crankcase air replenishment system of the hydrogen engine is also applicable to the control device of the crankcase air replenishment system of the hydrogen engine of the embodiment of the present invention. In order to avoid redundancy, it will not be elaborated here.

[0091] Corresponding to the above embodiments, the present application also proposes a computer-readable storage medium.

[0092] The computer-readable storage medium of the present application stores a control program of a crankcase air replenishment system of a hydrogen engine, and when the control program of the crankcase air replenishment system of a hydrogen engine is executed by a processor, the control method of the crankcase air replenishment system of a hydrogen engine is implemented.

[0093] It should be pointed out that the above-mentioned explanation of the embodiment and beneficial effects of the control method of the crankcase air replenishment system of the hydrogen engine is also applicable to the computer-readable storage medium of the embodiment of the present invention, and will not be elaborated here in order to avoid redundancy.

[0094] Corresponding to the above embodiments, the present application also proposes a vehicle.

[0095] See also Figure 5As shown, the vehicle 500 of the present application includes a memory 510, a processor 520, and a control program for a crankcase air replenishment system of a hydrogen energy engine stored in the memory 510 and executable on the processor 520. When the processor executes the control program for the crankcase air replenishment system of the hydrogen energy engine, the aforementioned control method for the crankcase air replenishment system of the hydrogen energy engine is implemented.

[0096] It should be pointed out that the above-mentioned explanation of the embodiment and beneficial effects of the control method of the crankcase air replenishment system of the hydrogen engine is also applicable to the vehicle of the embodiment of the present invention, and will not be elaborated here in order to avoid redundancy.

[0097] 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 purposes 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.

[0098] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of 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.

[0099] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", 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 invention. 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.

[0100] 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 the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0101] In the present invention, 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 the present invention can be understood according to specific circumstances.

[0102] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A method for controlling a crankcase air supply system of a hydrogen engine, characterized in that: The crankcase air supply system of the hydrogen engine includes an intake manifold, a supercharger arranged at the inlet of the intake manifold, a solenoid valve, and an air supply pipeline connecting the intake manifold and the solenoid valve, wherein the solenoid valve is configured to adjust the amount of gas entering the engine, and the supercharger is configured to increase the pressure of the gas entering the intake manifold. The method includes: Obtaining the load of the hydrogen engine and the hydrogen concentration in the crankcase; When the load of the hydrogen engine is greater than or equal to a first load threshold, determining the amount of air replenishment for the crankcase according to the load of the hydrogen engine, the hydrogen concentration in the crankcase and the amount of gas leakage of the hydrogen engine; Determining the opening of the solenoid valve according to the air supply amount and the pressure value of the supercharger; The solenoid valve is controlled according to the opening degree of the solenoid valve to remove moisture in the crankcase.

2. The control method of the crankcase air filling system of the hydrogen engine according to claim 1, characterized in that: Determining the amount of air replenishment for the crankcase according to the load of the hydrogen engine, the hydrogen concentration in the crankcase and the amount of gas leakage of the hydrogen engine, comprising: When the load of the hydrogen engine is greater than or equal to the first load threshold and less than a second load threshold, and the hydrogen concentration in the crankcase is less than or equal to a first hydrogen concentration threshold, the supplementary air amount is determined as the product of the leakage amount and a first coefficient.

3. The control method of the crankcase air filling system of the hydrogen engine according to claim 2, characterized in that: Determining the amount of air replenishment for the crankcase according to the load of the hydrogen engine, the hydrogen concentration in the crankcase and the amount of gas leakage of the hydrogen engine, comprising: When the load of the hydrogen engine is greater than or equal to the first load threshold and less than the second load threshold, and the hydrogen concentration in the crankcase is greater than the first hydrogen concentration threshold and less than or equal to the second hydrogen concentration threshold, the supplementary air amount is determined to be the product of the leakage amount and the second coefficient; The first coefficient is smaller than the second coefficient.

4. The control method of the crankcase air filling system of the hydrogen engine according to claim 2, characterized in that: Determining the amount of air replenishment for the crankcase according to the load of the hydrogen engine, the hydrogen concentration in the crankcase and the amount of gas leakage of the hydrogen engine, comprising: When the load of the hydrogen engine is greater than or equal to a second load threshold and the hydrogen concentration in the crankcase is less than or equal to the first hydrogen concentration threshold, the supplementary air amount is determined as the product of the leakage amount and a third coefficient.

5. The control method of the crankcase air filling system of the hydrogen engine according to claim 4, characterized in that: Determining the amount of air replenishment for the crankcase according to the load of the hydrogen engine, the hydrogen concentration in the crankcase and the amount of gas leakage of the hydrogen engine, comprising: When the load of the hydrogen engine is greater than or equal to the second load threshold, and the hydrogen concentration in the crankcase is greater than the first hydrogen concentration threshold and less than or equal to the second hydrogen concentration threshold, determining the supplementary air amount as the product of the leakage amount and a fourth coefficient; The third coefficient is smaller than the fourth coefficient.

6. The control method of the crankcase air filling system of the hydrogen engine according to any one of claims 1 to 5, characterized in that: The method further comprises: When the outlet water temperature of the hydrogen engine is less than or equal to a first preset temperature and the accumulated running time of the hydrogen engine is greater than a first preset time, the hydrogen engine is controlled to run until the outlet water temperature of the hydrogen engine is greater than or equal to a second preset temperature and the engine runs continuously for a second preset time, and the air replenishment amount is determined to be the product of the leakage amount and a fifth coefficient.

7. The method for controlling the crankcase air supply system of a hydrogen engine according to any one of claims 1 to 5, characterized in that: The method further comprises: When the hydrogen concentration in the crankcase obtained within a preset number of consecutive times is greater than a second hydrogen concentration threshold, an alarm is issued.

8. A control device for a crankcase air supply system of a hydrogen engine, characterized in that: The crankcase air supply system of the hydrogen engine includes an intake manifold, a supercharger arranged at the inlet of the intake manifold, a solenoid valve, and an air supply pipeline connecting the intake manifold and the solenoid valve, wherein the solenoid valve is configured to adjust the amount of gas entering the engine, and the supercharger is configured to increase the pressure of the gas entering the intake manifold. The device includes: An acquisition module, used for acquiring the load of the hydrogen engine and the hydrogen concentration in the crankcase; A first determination module is used to determine the amount of air replenishment of the crankcase according to the load of the hydrogen engine, the hydrogen concentration in the crankcase and the amount of gas leakage of the hydrogen engine when the load of the hydrogen engine is greater than or equal to a first load threshold; A second determination module, used for determining the opening of the solenoid valve according to the air supply amount and the pressure value of the supercharger; A control module is used to control the solenoid valve according to the opening of the solenoid valve to remove moisture in the crankcase.

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

10. A vehicle, characterized in that: The invention comprises a memory, a processor and a control program of a crankcase air replenishment system of a hydrogen energy engine which is stored in the memory and can be run on the processor. When the processor executes the control program of the crankcase air replenishment system of the hydrogen energy engine, a control method of the crankcase air replenishment system of the hydrogen energy engine according to any one of claims 1 to 7 is implemented.

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