Crankcase air supply control method, controller, crankcase air supply system and vehicle

Abstract

The invention discloses a crankcase air supply control method, a controller, a crankcase air supply system and a vehicle, and relates to the field of hydrogen internal combustion engines. The crankcase air supply control method comprises the steps that under the condition that the hydrogen concentration is not smaller than a safe concentration threshold value, a first flow adjusting valve and a second flow adjusting valve are controlled correspondingly; and opening to an opening corresponding to a first opening control parameter matched with the hydrogen concentration and the first water content, mixing gas output by the first flow regulating valve and the second flow regulating valve, and introducing the mixed gas into a crankcase of the hydrogen internal combustion engine. On the basis of adjustment of the opening degrees of the first flow adjusting valve and the second flow adjusting valve, under the condition that the hydrogen concentration is not smaller than the safety concentration threshold value, air is supplied to the crankcase through air output by the supercharger and the air filter, and the temperature of mixed gas is increased through high-temperature gas output by the supercharger; compared with an existing mode that air is supplemented only through a supercharger, the engine oil emulsification phenomenon is restrained while the output power of the hydrogen internal combustion engine is prevented from being reduced.

Description

Technical Field

[0001] The present application relates to the technical field of hydrogen internal combustion engines, and in particular to a crankcase air filling control method, a controller, a crankcase air filling system and a vehicle. Background Art

[0002] A hydrogen internal combustion engine uses hydrogen fuel (such as hydrogen gas or a fuel containing hydrogen). Because the exhaust gas from hydrogen combustion contains a high moisture content, when the exhaust gas diffuses into the crankcase, the temperature difference can easily cause water to precipitate, leading to oil emulsification in the crankcase. This oil emulsification reduces the lubricating effect of the oil, affecting the operating reliability of the hydrogen internal combustion engine.

[0003] Existing crankcase air injection systems for hydrogen internal combustion engines primarily direct high-pressure gas from the supercharger into the crankcase. This accelerates the rate of air outflow from the crankcase, inhibiting water release and thus preventing oil emulsification. However, excessive intake of supercharger gas can lead to a decrease in engine output power. Therefore, how to prevent this decrease in output power while simultaneously suppressing oil emulsification has become a pressing issue. Summary of the Invention

[0004] In view of the above problems, this application provides a crankcase air filling control method, controller, crankcase air filling system and vehicle to achieve the purpose of preventing output power drop while suppressing oil emulsification. The specific solution is as follows:

[0005] A first aspect of the present application provides a crankcase air injection control method, comprising:

[0006] obtaining a hydrogen concentration and a first water content of a crankcase of a hydrogen internal combustion engine;

[0007] When the hydrogen concentration is not less than the safety concentration threshold, the first flow regulating valve and the second flow regulating valve are controlled respectively to open to an opening corresponding to a first opening control parameter adapted to both the hydrogen concentration and the first water content, and the mixed gas obtained by mixing the gases output by the first flow regulating valve and the second flow regulating valve is introduced into the crankcase of the hydrogen internal combustion engine, wherein the opening of the first flow regulating valve in the first opening control parameter is greater than the opening of the second flow regulating valve, the first flow regulating valve is a valve for controlling the flow of supplementary air of the supercharger of the hydrogen internal combustion engine, and the second flow regulating valve is a valve for controlling the flow of supplementary air of the air filter of the hydrogen internal combustion engine.

[0008] In a possible implementation, when the hydrogen concentration is less than the safety concentration threshold, the crankcase air filling control method further includes:

[0009] obtaining a second moisture content of the air filter;

[0010] controlling the first flow regulating valve and the second flow regulating valve to open to respective openings corresponding to second opening control parameters adapted to both the first moisture content and the second moisture content, wherein the opening of the first flow regulating valve in the second opening control parameters is not greater than the opening of the second flow regulating valve;

[0011] When the third water content of the mixed gas is not less than a water content threshold, the mixed gas is introduced into a dryer, and when the third water content of the dried mixed gas is less than the water content threshold, the mixed gas is introduced into the crankcase.

[0012] In a possible implementation, before introducing the mixed gas into the crankcase, the crankcase air replenishment control method further includes:

[0013] When the temperature of the mixed gas is lower than the water separation temperature threshold, the mixed gas is introduced into the heating device, and when the temperature of the heated mixed gas is not lower than the water separation temperature threshold, the mixed gas is introduced into the crankcase.

[0014] A second aspect of the present application provides a controller, comprising: at least one processor and a memory connected to the processor, wherein:

[0015] The memory is used to store computer programs;

[0016] The processor is used to execute the computer program so that the controller can implement the crankcase air replenishment control method provided in the first aspect of the present application and any possible implementation of the first aspect.

[0017] A third aspect of the present application provides a crankcase air replenishment system, comprising:

[0018] A first air supply pipeline, a second air supply pipeline, a third air supply pipeline, a first flow regulating valve, a second flow regulating valve, a four-way valve, and the controller provided in the second aspect of the present application;

[0019] The first flow regulating valve is disposed in a first air supply line connected to an air outlet of a supercharger of the hydrogen internal combustion engine and a first end of the four-way valve. The second flow regulating valve is disposed in a second air supply line connected to an air outlet of an air filter of the hydrogen internal combustion engine and a second end of the four-way valve. The third end of the four-way valve is connected to an air supply port of a crankcase of the hydrogen internal combustion engine through the third air supply line.

[0020] The first flow regulating valve is used to control the air supply flow of the supercharger;

[0021] The second flow regulating valve is used to control the air supply flow of the air filter;

[0022] The four-way valve is used to mix the gases output by the first flow regulating valve and the second flow regulating valve, and introduce the mixed gas into the crankcase;

[0023] The controller is electrically connected to the first flow regulating valve, the second flow regulating valve and the four-way valve, respectively, and is used to control the first flow regulating valve and the second flow regulating valve, respectively, to open them to an opening corresponding to a first opening control parameter adapted to both the hydrogen concentration and the first water content of the crankcase, when the hydrogen concentration of the crankcase is not less than a safe concentration threshold, wherein the opening of the first flow regulating valve is greater than the opening of the second flow regulating valve; and is also used to control the first end, the second end and the third end of the four-way valve to be conductive, and the fourth end of the four-way valve to be closed.

[0024] In a possible implementation, the crankcase air supply system further includes:

[0025] a dryer, wherein the fourth end of the four-way valve is connected to the inlet of the dryer, and the outlet of the dryer is connected to the first end or the second end;

[0026] The controller is used to control the first flow regulating valve and the second flow regulating valve respectively to open to an opening corresponding to a second opening control parameter adapted to both the first moisture content and the second moisture content of the air filter when the hydrogen concentration is less than the safety concentration threshold, wherein the opening of the first flow regulating valve in the second opening control parameter is not greater than the opening of the second flow regulating valve; and is also used to control the first end, the second end, and the fourth end of the four-way valve to be conductive, and the third end to be opened to a minimum opening when the third moisture content of the mixed gas is not less than the moisture content threshold; and is also used to control the first end, the second end, and the third end of the four-way valve to be conductive, and the fourth end to be closed when the third moisture content of the mixed gas is less than the moisture content threshold.

[0027] In a possible implementation, the crankcase air supply system further includes:

[0028] A bypass valve and a heating device, wherein the bypass valve is connected in series to the third air supply pipeline, the bypass port of the bypass valve is connected to the inlet of the heating device, and the outlet of the heating device is connected to the inlet of the bypass valve;

[0029] The controller is electrically connected to the bypass valve and the heating device, respectively, and is used to control the bypass valve outlet to open to the minimum opening, the bypass port to be connected, and the heating device to heat the mixed gas when the temperature of the mixed gas is lower than the water analysis temperature threshold; and is also used to control the bypass valve outlet to be connected, the bypass port to be closed, and the heating device to stop heating when the temperature of the heated mixed gas is not lower than the water analysis temperature threshold.

[0030] In a possible implementation, the heating device operates in an electric heating mode when the hydrogen internal combustion engine is in a power-on self-test state.

[0031] In a possible implementation, the heating device operates in an exhaust gas heating mode when the hydrogen internal combustion engine is in a loaded operation state.

[0032] According to a fourth aspect of the present application, a vehicle is provided, comprising: a crankcase air supply system as provided in accordance with any one of the third and third aspects of the present application. By means of the above technical solution, the crankcase air supply control method, controller, crankcase air supply system, and vehicle provided in the present application are configured to, when the hydrogen concentration is not less than a safety concentration threshold, control the first flow control valve and the second flow control valve to open to an opening corresponding to a first opening control parameter adapted to both the hydrogen concentration and the first water content, so as to utilize the second flow control valve to introduce ambient air from the air filter, thereby utilizing the mixed gas input from the supercharger and the air filter to supply the crankcase with air, thereby satisfying the crankcase air supply requirement to suppress the hydrogen concentration while avoiding the risk of a decrease in the output power of the hydrogen internal combustion engine under high load conditions due to air supply from the supercharger alone. The first and second flow control valves are respectively controlled to open to an opening corresponding to a first opening control parameter adapted to both the hydrogen concentration and the first water content. The gases outputted from the first and second flow control valves are mixed and introduced into the crankcase of the hydrogen internal combustion engine, thereby adjusting the ratio of the supercharger output gas and the air filter output gas in the mixed gas. The high-temperature, dry gas outputted by the supercharger is used to heat the mixed gas and reduce the water content of the mixed gas, thereby suppressing engine oil emulsification. This demonstrates that the present application suppresses crankcase hydrogen concentration and engine oil emulsification while avoiding a decrease in output power. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The above and other features, advantages, and aspects of the various embodiments of the present disclosure will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. Throughout the drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and that the originals and elements are not necessarily drawn to scale.

[0034] Figure 1A flow chart of a crankcase air supply control method provided in this application;

[0035] Figure 2 A flow chart of a crankcase air supply control method provided for a possible implementation of the present application;

[0036] Figure 3 A schematic diagram of the structure of a controller provided in this application;

[0037] Figure 4 A schematic structural diagram of a crankcase air replenishment system provided in this application;

[0038] Figure 5 A schematic diagram of the connection relationship of a dryer provided in this application;

[0039] Figure 6 A structural schematic diagram of a crankcase air replenishment system is provided for a possible implementation of the present application. DETAILED DESCRIPTION

[0040] The following describes the embodiments of the present application in conjunction with the accompanying drawings. The terms used in the implementation methods of the present application are only used to explain the specific embodiments of the present application and are not intended to limit the present application.

[0041] The embodiments of the present application are described below in conjunction with the accompanying drawings. Those skilled in the art will appreciate that, with the development of technology and the emergence of new scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0042] The terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances, and this is merely a way of distinguishing the objects of the same attributes when describing them in the embodiments of the present application. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, so that the process, method, system, product or equipment comprising a series of units need not be limited to those units, but may include other units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0043] It should be noted that, in practical applications, this application achieves the inventive objective of preventing a decrease in the output power of a hydrogen internal combustion engine while suppressing oil emulsification, compared to the prior art. Specifically, existing crankcase ventilation systems direct high-pressure gas from a supercharger into the crankcase. This accelerates the rate of air outflow from the crankcase, reducing the crankcase hydrogen concentration while also shortening the gas's retention time within the crankcase, thereby preventing the precipitation of condensed water droplets from the gas and the subsequent oil emulsification. However, as the load of a hydrogen internal combustion engine gradually increases, the hydrogen concentration in the crankcase also increases, and the amount of air required to make up the crankcase also increases. When the crankcase hydrogen concentration exceeds the safe level, the hydrogen internal combustion engine is also in a high-load state (e.g., the output torque is 70% to 100% of the maximum output torque). In this case, to ensure stable output power of the hydrogen internal combustion engine under high load, the gas provided by the supercharger must be supplied to the hydrogen internal combustion engine first, resulting in a reduction in the amount of air intake for crankcase air replenishment. A reduction in intake volume also reduces the rate at which gas flows out of the crankcase. Because the crankcase gas contains moisture generated during the combustion process, when the gas outflow rate decreases, the temperature influence can cause water to precipitate from the crankcase gas before it flows out of the crankcase, leading to oil emulsification. The present invention, however, controls the first and second flow control valves to open to a first opening control parameter corresponding to both the hydrogen concentration and the first water content when the hydrogen concentration is no less than a safety concentration threshold. The gases output from the first and second flow control valves are then mixed and introduced into the crankcase of the hydrogen internal combustion engine. This utilizes the mixed gas output from the supercharger and air filter to replenish the crankcase. Compared to existing methods that replenish air only from the supercharger, this reduces the amount of air consumed by the supercharger's outlet, thereby meeting the crankcase's replenishment needs while avoiding a decrease in the hydrogen internal combustion engine's output power. Furthermore, by controlling the first and second flow control valves to open to openings corresponding to first opening control parameters adapted to both the hydrogen concentration and the first water content, the high-temperature gas output from the supercharger is used to dilute and heat the gas output from the air filter, thereby reducing the water content of the mixed gas while maintaining the temperature of the mixed gas. This prevents the oil from emulsifying due to water separation during the flow of the mixed gas through the crankcase due to excessively low mixed gas temperature. This demonstrates that the present application prevents oil emulsification while preventing a decrease in the output power of the hydrogen internal combustion engine.

[0044] The first aspect of the present application provides a crankcase air filling control method, such as Figure 1 As shown, the crankcase air filling control method includes:

[0045] S101: Obtain a hydrogen concentration and a first water content in a crankcase of a hydrogen internal combustion engine.

[0046] It should be noted that in actual application scenarios, the above-mentioned crankcase hydrogen concentration can be a parameter collected by a hydrogen concentration sensor deployed inside the crankcase, and the first water content of the crankcase can be a parameter collected by a water content sensor deployed inside the crankcase. During the operation of a hydrogen internal combustion engine, the products of combustion of hydrogen fuel entering the combustion chamber of the hydrogen internal combustion engine mainly include water vapor and residual hydrogen fuel. Under the action of external forces (suction of the oil-gas separator, piston force), the combustion products including water vapor and hydrogen fuel will enter the crankcase through the gaps in the hydrogen internal combustion engine. As the load of the hydrogen internal combustion engine gradually increases, the concentration of exhaust gas entering the crankcase gradually increases, which in turn causes the hydrogen concentration and the first water content of the crankcase to increase.

[0047] S102. When the hydrogen concentration is not less than the safety concentration threshold, the first flow regulating valve and the second flow regulating valve are controlled respectively to open to an opening corresponding to a first opening control parameter adapted to both the hydrogen concentration and the first water content, and the mixed gas obtained by mixing the gases output by the first flow regulating valve and the second flow regulating valve is introduced into the crankcase of the hydrogen internal combustion engine, wherein the opening of the first flow regulating valve in the first opening control parameter is greater than the opening of the second flow regulating valve, the first flow regulating valve is a valve for controlling the supplementary air flow of the supercharger of the hydrogen internal combustion engine, and the second flow regulating valve is a valve for controlling the supplementary air flow of the air filter of the hydrogen internal combustion engine.

[0048] It should be noted that in actual application scenarios, the above-mentioned safety concentration threshold value can be a threshold value determined by analyzing the relationship between the load state of the hydrogen internal combustion engine, the hydrogen concentration and the risk of deflagration after testing and calibrating the hydrogen internal combustion engine. Since the hydrogen concentration increases with the increase of load. Therefore, the situation where the above-mentioned hydrogen concentration is not less than the safety concentration threshold value indicates that the hydrogen internal combustion engine is currently in a high-load operating state. When the hydrogen internal combustion engine is in a high-load state, the gas output by the supercharger is mainly used to assist the combustion of the hydrogen internal combustion engine. Since the gas volume output by the supercharger is adapted to the load state and cannot be increased indefinitely, if too much of the gas volume output by the supercharger is used to replenish gas, the gas volume used to assist the supercharger gas outlet in the combustion chamber of the hydrogen internal combustion engine will be reduced, thereby affecting the stable operation of the hydrogen internal combustion engine. Therefore, the present application is configured to control the first flow regulating valve and the second flow regulating valve respectively when the hydrogen concentration is not less than the safety concentration threshold, and open them to the opening corresponding to the first opening control parameter that is adapted to both the hydrogen concentration and the first water content, so as to utilize the second flow regulating valve to introduce ambient air from the air filter, and thereby utilize the mixed gas input by the supercharger and the air filter to replenish the crankcase with air, so as to meet the crankcase's replenishment demand for suppressing the hydrogen concentration while avoiding the risk of a decrease in the output power of the hydrogen internal combustion engine under high load conditions due to only replenishing the air through the supercharger.

[0049] It should be noted that in actual application scenarios, although the mixed gas output by the supercharger and air filter meets the crankcase's air replenishment needs, the gas output by the air filter is ambient air introduced by the air filter. This causes the gas input by the air filter to be easily affected by the humidity of the external environment and has the risk of a high water content. If the water content of the gas output by the air filter is too high, the water content of the mixed gas will be high, resulting in the risk of water separation after the mixed gas enters the crankcase, thereby causing oil emulsification. Therefore, the present application configures and controls the first flow regulating valve and the second flow regulating valve respectively, opens them to the opening corresponding to the first opening control parameter that is adapted to both the hydrogen concentration and the first water content, and mixes the gases output by the first flow regulating valve and the second flow regulating valve and introduces them into the crankcase of the hydrogen internal combustion engine, and the opening of the first flow regulating valve in the first opening control parameter is greater than the opening of the second flow regulating valve, thereby adjusting the ratio of the supercharger output gas and the air filter output gas in the mixed gas, so as to utilize the high-temperature and dry gas output by the supercharger to heat the mixed gas and reduce the water content of the mixed gas, thereby suppressing the emulsification of the engine oil.

[0050] It should be noted that in actual application scenarios, the first opening control parameter adapted to both the hydrogen concentration and the first water content can be a control parameter determined based on a calibration test. Specifically, the hydrogen internal combustion engine can be controlled to operate under different load conditions at different ambient humidity levels. During this process, the openings of the first and second flow control valves are adjusted, and the presence of water analysis in the crankcase under different opening combinations is recorded. Based on the recorded results and the hydrogen concentration and water content under the corresponding load conditions, the first control parameter corresponding to the different hydrogen concentrations and water contents can be determined.

[0051] The present application configures a method for controlling the first and second flow control valves to open to an opening corresponding to a first opening control parameter adapted for both the hydrogen concentration and the first water content when the hydrogen concentration is not less than a safety concentration threshold. The method then uses the second flow control valve to introduce ambient air from the air filter, thereby utilizing the mixed gas input from the supercharger and the air filter for crankcase air replenishment. This method satisfies the crankcase air replenishment requirement to suppress hydrogen concentration while avoiding the risk of power loss from the supercharger alone resulting from high-load conditions. Furthermore, the method configures the first and second flow control valves to open to an opening corresponding to a first opening control parameter adapted for both the hydrogen concentration and the first water content, and then mixes the gases outputted from the first and second flow control valves and introduces them into the crankcase of the hydrogen internal combustion engine. This method adjusts the ratio of the supercharger output gas to the air filter output gas in the mixed gas, utilizing the high-temperature, dry gas outputted by the supercharger to heat the mixed gas and reduce its water content, thereby suppressing oil emulsification. It can be seen that the present application achieves the suppression of crankcase hydrogen concentration and oil emulsification while avoiding the decrease in output power.

[0052] In a possible implementation, when the hydrogen concentration is less than a safety concentration threshold, the crankcase air filling control method further includes:

[0053] obtaining a second moisture content of the air filter;

[0054] Controlling the first flow regulating valve and the second flow regulating valve respectively to open to an opening corresponding to a second opening control parameter adapted to both the first moisture content and the second moisture content, wherein the opening of the first flow regulating valve in the second opening control parameter is not greater than the opening of the second flow regulating valve;

[0055] When the third water content of the mixed gas is not less than the water content threshold, the mixed gas is introduced into the dryer, and when the third water content of the dried mixed gas is less than the water content threshold, the mixed gas is introduced into the crankcase.

[0056] It should be noted that, in actual application scenarios, the situation where the above-mentioned hydrogen concentration is less than the safety concentration threshold indicates that the hydrogen internal combustion engine is not in a high-load operating state. Since the supercharger is in a medium-to-low load state when the hydrogen internal combustion engine is in a low-to-medium load state (such as the output torque accounts for 0% to 70% of the maximum output torque), it is easy for surge or too low speed to cause the output gas volume to be unstable and the total amount to be small. Therefore, the present application configures the first flow control valve and the second flow control valve to be controlled respectively, and opens them to the opening corresponding to the second opening control parameter that is adapted to both the first water content and the second water content, and configures the opening of the first flow control valve in the second opening control parameter to be no greater than the opening of the second flow control valve, so as to increase the proportion of gas output by the air filter in the mixed gas, thereby ensuring that the gas volume of the mixed gas meets the air replenishment demand of the crankcase.

[0057] It should be noted that in actual application scenarios, the second opening control parameter adapted to both the first and second moisture contents may be a control parameter determined based on calibration testing. Specifically, the hydrogen internal combustion engine may be controlled to operate under different load conditions at different ambient humidity levels. During this process, the openings of the first and second flow control valves may be adjusted, and the occurrence of water analysis in the crankcase under different opening combinations may be recorded. Based on the recorded results and the first and second moisture contents under the corresponding load conditions, the first control parameters corresponding to the different first and second moisture contents may be determined.

[0058] It should be noted that in actual application scenarios, the increased proportion of gas output from the air filter in the mixed gas leads to a risk of increased water content in the mixed gas, which in turn leads to the risk of oil emulsification caused by water analysis. Therefore, the present application configures and controls the first flow regulating valve and the second flow regulating valve respectively, and when the valve is opened to an opening corresponding to a second opening control parameter adapted to both the first and second water contents, collects the third water content of the mixed gas, and configures the mixed gas to be introduced into a dryer when the third water content of the mixed gas is not less than a water content threshold, and to be introduced into the crankcase when the third water content of the dried mixed gas is less than the water content threshold, thereby using the dryer to dry the mixed gas to reduce the water content of the mixed gas entering the crankcase, thereby suppressing the oil emulsification phenomenon.

[0059] In one possible implementation, before introducing the mixed gas into the crankcase, the crankcase air filling control method further includes:

[0060] When the temperature of the mixed gas is lower than the water separation temperature threshold, the mixed gas is introduced into the heating device, and when the temperature of the heated mixed gas is not lower than the water separation temperature threshold, the mixed gas is introduced into the crankcase.

[0061] It should be noted that in actual application scenarios, the temperature of the mixed gas in the pipeline will change due to the influence of the external ambient temperature during the process of the mixed gas flowing to the crankcase. In addition, since the moisture in the mixed gas cannot be completely removed, if the temperature of the mixed gas is too low, water will be precipitated from the mixed gas during the process of flowing to the crankcase, and the precipitated water will enter the crankcase under the push of the mixed gas, thereby causing the engine oil emulsification phenomenon. Therefore, the present application introduces the mixed gas into the heating device when the temperature of the mixed gas is less than the water precipitation temperature threshold, and introduces the mixed gas into the crankcase when the temperature of the heated mixed gas is not less than the water precipitation temperature threshold, so that the temperature of the mixed gas entering the crankcase is not less than the water precipitation temperature threshold, thereby suppressing the engine oil emulsification caused by water precipitated due to too low a temperature.

[0062] To facilitate understanding of the crankcase air injection control method provided by the first aspect of the present application and any possible implementation of the first aspect, a possible implementation of the present application is specifically described herein:

[0063] like Figure 2 FIG. 1 is a flow chart of a crankcase air filling control method, and the specific operation steps are as follows:

[0064] Step S201: Obtain the hydrogen concentration and first water content of the crankcase of the hydrogen internal combustion engine, and the second water content of the air filter, and trigger step S202.

[0065] Step S202: Determine whether the hydrogen concentration is less than the safety concentration threshold. If not, step S203 is triggered; if so, step S204 is triggered.

[0066] In step S203, the first flow regulating valve and the second flow regulating valve are controlled to open to an opening corresponding to a first opening control parameter adapted to both the hydrogen concentration and the first water content, thereby generating a mixed gas, and step S205 is triggered.

[0067] In step S204, the first flow regulating valve and the second flow regulating valve are controlled to open to an opening corresponding to a second opening control parameter adapted to both the first moisture content and the second moisture content, thereby generating a mixed gas, and step S206 is triggered.

[0068] Step S205: Determine whether the temperature of the mixed gas is less than a water separation threshold. If yes, step S207 is triggered; if no, step S208 is triggered.

[0069] Step S206: Determine whether the third water content of the mixed gas is less than the water content threshold. If yes, step S205 is triggered; if not, step S209 is triggered.

[0070] In step S207, the mixed gas is introduced into the heating device for heating, and step S205 is triggered.

[0071] Step S208: introducing the mixed gas into the crankcase.

[0072] Step S209: introducing the mixed gas into the dryer for drying, and triggering step S206.

[0073] A second aspect of the present application provides a controller, comprising: at least one processor and a memory connected to the processor, wherein:

[0074] Memory is used to store computer programs;

[0075] The processor is used to execute the computer program so that the controller can implement the crankcase air replenishment control method provided in the first aspect of the present application and any possible implementation of the first aspect.

[0076] The structural diagram of the controller provided in the second aspect of this application is as follows Figure 3 The controller in the embodiments of the present application may be a server, a PC, a PAD, a mobile phone, an ECU (Electronic Control Unit), a VCU (Vehicle Control Unit), an MCU (Micro Controller Unit), an HCU (Hybrid Control Unit), etc. Figure 3 The controller shown is merely an example and should not limit the functions and scope of use of the embodiments of the present application.

[0077] like Figure 3 As shown, the controller may include a processing device (e.g., a central processing unit, graphics processing unit, etc.) 301, which can perform various appropriate actions and processes based on programs stored in a read-only memory (ROM) 302 or programs loaded from a storage device 308 into a random access memory (RAM) 303. When the controller is powered on, RAM 303 also stores various programs and data required for controller operation. Processing device 301, ROM 302, and RAM 303 are interconnected via a bus 304. An input / output (I / O) interface 305 is also connected to bus 304.

[0078] Typically, the following devices may be connected to the I / O interface 305: an input device 306 including, for example, a touch screen, a touchpad, a keyboard, a mouse, a camera, a microphone, a torque sensor, a hydrogen concentration sensor, etc.; an output device 307 including, for example, a liquid crystal display (LCD), a speaker, a flow control valve, etc.; a storage device 308 including, for example, a memory card, a hard disk, etc.; and a communication device 309. The communication device 309 may allow the controller to communicate with other devices wirelessly or by wire to exchange data. Although Figure 3 The controller is shown with various devices, but it should be understood that it is not required to implement or have all of the devices shown. More or fewer devices may be implemented or have instead.

[0079] The third aspect of the present application provides a crankcase air replenishment system, such as Figure 4 As shown, the crankcase air replenishment system includes:

[0080] The first air supply pipeline 401, the second air supply pipeline 402, the third air supply pipeline 403, the first flow regulating valve 404, the second flow regulating valve 405, the four-way valve 406 and the controller 407 provided in the second aspect of the present application;

[0081] A first flow regulating valve 404 is disposed in a first air supply line 401 connecting an air outlet of a supercharger of the hydrogen internal combustion engine and a first end of a four-way valve 406. A second flow regulating valve 405 is disposed in a second air supply line 402 connecting an air outlet of an air filter of the hydrogen internal combustion engine and a second end of the four-way valve 406. A third end of the four-way valve 406 is connected to an air supply port of a crankcase of the hydrogen internal combustion engine via a third air supply line 403.

[0082] The first flow regulating valve 404 is used to control the air supply flow of the supercharger;

[0083] The second flow regulating valve 405 is used to control the air supply flow of the air filter;

[0084] The four-way valve 406 is used to mix the gases output by the first flow regulating valve 404 and the second flow regulating valve 405 and introduce the mixed gas into the crankcase;

[0085] The controller 407 is electrically connected to the first flow regulating valve 404, the second flow regulating valve 405 and the four-way valve 406, respectively, and is used to control the first flow regulating valve 404 and the second flow regulating valve 405, respectively, to open them to an opening corresponding to a first opening control parameter that is adapted to both the hydrogen concentration and the first water content of the crankcase when the hydrogen concentration of the crankcase is not less than the safety concentration threshold, wherein the opening of the first flow regulating valve 404 is greater than the opening of the second flow regulating valve 405; it is also used to control the first end, the second end and the third end of the four-way valve 406 to be conductive, and the fourth end of the four-way valve 406 to be closed.

[0086] In one possible implementation, the crankcase concentration may be acquired by a hydrogen concentration sensor disposed in the crankcase and electrically connected to the controller 407. The first water content may be acquired by a water content sensor disposed in the crankcase and electrically connected to the controller 407.

[0087] In a possible implementation, the crankcase air supply system provided in the third aspect of the present application further includes:

[0088] A dryer, wherein the fourth end of the four-way valve 406 is connected to the inlet of the dryer, and the outlet of the dryer is connected to the first end or the second end;

[0089] The controller 407 is used to control the first flow regulating valve 404 and the second flow regulating valve 405 respectively when the hydrogen concentration is less than the safety concentration threshold, and open them to an opening corresponding to a second opening control parameter that is adapted to the first moisture content and the second moisture content of the air filter, wherein the opening of the first flow regulating valve 404 in the second opening control parameter is not greater than the opening of the second flow regulating valve 405; it is also used to control the first end, the second end and the fourth end of the four-way valve 406 to be conductive, and the third end to be opened to the minimum opening when the third moisture content of the mixed gas is not less than the moisture content threshold; it is also used to control the first end, the second end and the third end of the four-way valve 406 to be conductive, and the fourth end to be closed when the third moisture content of the mixed gas is less than the moisture content threshold.

[0090] It should be noted that, in actual application scenarios, the second moisture content may be acquired by a moisture content sensor disposed in the second air supply line 402 and electrically connected to the controller 407. The third moisture content may be acquired by a moisture content sensor disposed in the four-way valve 406 and electrically connected to the controller 407.

[0091] It should be noted that in actual application scenarios, the connection relationship diagram of the above dryer can be as follows: Figure 5 As shown. Among them, Figure 5 The connection relationship of other devices except the dryer is the same as Figure 4 The fourth end of the four-way valve 406 of the dryer is connected to the inlet of the dryer 408, and the outlet of the dryer 408 is connected to the second end of the four-way valve 406. When the third moisture content of the mixed gas is not less than the moisture content threshold, the first end, the second end and the fourth end of the four-way valve 406 are controlled to be connected, and the mixed gas flows to Figure 5As indicated by the middle arrow: the gas flows from the fourth end of the four-way valve 406 into the inlet of the dryer 408, and flows from the outlet of the dryer 408 to the second end of the four-way valve 406. It should be noted that, during the operation of the crankcase air supply system, the first flow regulating valve 404 and the second flow regulating valve 405 will continue to supply gas to the four-way valve 406. If the third end is completely closed, the air pressure in the first air supply pipeline 401, the second air supply pipeline 402 and the four-way valve 406 will gradually increase, creating a risk of device damage. Therefore, the present application configures the third end to be opened to the minimum opening, thereby ensuring the drying effect of the mixed gas while utilizing the third end to relieve pressure to avoid device damage and improve the operational reliability of the crankcase air supply system.

[0092] It should be noted that, in actual application scenarios, there may be various types of dryers, including but not limited to: adsorption dryers, refrigeration dryers, membrane dryers, etc. Preferably, the dryer may be a double-tower adsorption dryer, which is equipped with two sets of drying equipment. In the event that one set of drying equipment fails due to saturation, the other set of drying equipment takes over the drying process, while the saturated and aged drying equipment begins to regenerate and remove water, thereby ensuring the continuity and reliability of the drying process. In one possible implementation, the third aspect of the present application and any possible implementation of the third aspect provide a crankcase air replenishment system that also includes:

[0093] The bypass valve and the heating device are connected in series in the third air supply pipeline 403, the bypass port of the bypass valve is connected to the inlet of the heating device, and the outlet of the heating device is connected to the inlet of the bypass valve;

[0094] The controller 407 is electrically connected to the bypass valve and the heating device, respectively, and is used to control the bypass valve outlet to open to the minimum opening, the bypass port to be connected, and the heating device to heat the mixed gas when the temperature of the mixed gas is lower than the water analysis temperature threshold; it is also used to control the bypass valve outlet to be connected, the bypass port to be closed, and the heating device to stop heating when the temperature of the heated mixed gas is not lower than the water analysis temperature threshold.

[0095] It should be noted that in actual application scenarios, since the crankcase air filling system operates, mixed gas continues to exist in the third air filling line 403. Therefore, the present application configures the bypass valve outlet to be opened to the minimum opening, thereby ensuring the mixed gas heating effect while utilizing the bypass valve outlet to relieve pressure, thereby avoiding component damage and improving the operational reliability of the crankcase air filling system.

[0096] To facilitate understanding of the crankcase air supply system structure provided by the third aspect of the present application and any possible implementation of the third aspect, a possible implementation of the present application is specifically described herein:

[0097] like Figure 6 The figure shows a schematic diagram of the structure of a crankcase air supply system. This crankcase air supply system is applied to a hydrogen internal combustion engine, which includes a supercharger, an air filter, a combustion chamber, a crankcase, an oil pan, and an oil-gas separator. The first air outlet of the air filter is connected to the first air inlet of the supercharger via a pipeline. The exhaust port of the oil-gas separator is connected to the second air inlet of the supercharger via a pipeline. The first air outlet of the supercharger is connected to the air inlet of the combustion chamber. The combustion chamber, crankcase, and oil pan form an integrated unit. The exhaust port of the crankcase is connected to the air inlet of the oil-gas separator, and the oil drain port of the oil-gas separator is connected to the oil inlet of the oil pan. The second air outlet of the supercharger is connected to the first end of a four-way valve 406 via a first air supply line 401. The second air outlet of the air filter is connected to the second end of the four-way valve 406 via a second air supply line 402. The third end of the four-way valve 406 is connected to the air inlet of a bypass valve 409 via a third air supply line 403. The air outlet of the bypass valve 409 is connected to the air supply port of the crankcase via the third air supply line 403. The fourth end of the four-way valve 406 is connected to the inlet of a dryer 408. The outlet of the dryer 408 is connected to the second end of the four-way valve 406. The bypass port of the bypass valve 409 is connected to the inlet of a heater 410. The outlet of the heater 410 is connected to the air inlet of the bypass valve 409. A first flow control valve 404 is disposed in the first air supply line 401, and a second flow control valve 405 is disposed in the second air supply line 402. The first flow regulating valve 404 , the second flow regulating valve 405 , the four-way valve 406 , the bypass valve 409 and the heating device 410 are all electrically connected to the controller 407 .

[0098] In a possible implementation, the heating device operates in an electric heating mode when the hydrogen internal combustion engine is in a power-on self-test state.

[0099] In a possible implementation, the heating device operates in an exhaust gas heating mode when the hydrogen internal combustion engine is in a loaded operating state.

[0100] Fourthly, in actual application scenarios, when the hydrogen internal combustion engine is in the power-on self-test state, the hydrogen internal combustion engine is not in operation or idling operation, and the temperature of the supercharger output gas is relatively low. Therefore, this application configures a heating device to operate in electric heating mode when the hydrogen internal combustion engine is in the power-on self-test state, and in exhaust gas heating mode when the hydrogen internal combustion engine is in load operation, thereby ensuring that the oil emulsification phenomenon is suppressed in all states of the hydrogen internal combustion engine, while also improving energy utilization.

[0101] The fourth aspect of the present application provides a vehicle, comprising: a crankcase air replenishment system as provided in the third aspect of the present application and any possible implementation of the third aspect.

[0102] An embodiment of the present application also provides a computer program product including computer-readable instructions. When the computer-readable instructions are executed on an electronic device, the electronic device implements any crankcase air replenishment control method provided in the embodiment of the present application.

[0103] A computer-readable storage medium is also provided in an embodiment of the present application. The storage medium carries one or more computer programs. When the one or more computer programs are executed by a controller, the controller can implement any crankcase air replenishment control method provided in the embodiment of the present application.

[0104] It should also be noted that the device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed across multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment. In addition, in the drawings of the device embodiments provided in this application, the connection relationship between the modules indicates that there is a communication connection between them, which can be specifically implemented as one or more communication buses or signal lines.

[0105] Through the description of the above embodiments, those skilled in the art can clearly understand that the present application can be implemented by means of software plus necessary general hardware, and of course can also be implemented by special hardware including application-specific integrated circuits, special CPUs, special memories, special components, etc. In general, all functions performed by computer programs can be easily implemented with corresponding hardware, and the specific hardware structures used to implement the same function can also be diverse, such as analog circuits, digital circuits or special circuits, etc. However, for the present application, software program implementation is a better implementation method in most cases. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a readable storage medium, such as a computer's floppy disk, USB flash drive, mobile hard disk, ROM, RAM, magnetic disk or optical disk, etc., and includes a number of instructions to enable a computer device (which can be a personal computer, training equipment, or network equipment, etc.) to execute the methods described in each embodiment of the present application.

[0106] In the above embodiments, all or part of the embodiments may be implemented by software, hardware, firmware, or any combination thereof. When implemented by software, all or part of the embodiments may be implemented in the form of a computer program product.

[0107] The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website, a computer, a training device or a data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website, a computer, a training device or a data center. The computer-readable storage medium can be any available medium that a computer can store or a data storage device such as a training device, a data center, etc. that includes one or more available media integrations. The available medium can be a magnetic medium, (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state drive (SSD)).

Claims

1. A crankcase air supply control method, characterized in that: include: obtaining a hydrogen concentration and a first water content of a crankcase of a hydrogen internal combustion engine; When the hydrogen concentration is not less than the safety concentration threshold, the first flow regulating valve and the second flow regulating valve are controlled respectively to open to an opening corresponding to a first opening control parameter adapted to both the hydrogen concentration and the first water content, and the mixed gas obtained by mixing the gases output by the first flow regulating valve and the second flow regulating valve is introduced into the crankcase of the hydrogen internal combustion engine, wherein the opening of the first flow regulating valve in the first opening control parameter is greater than the opening of the second flow regulating valve, the first flow regulating valve is a valve for controlling the flow of supplementary air of the supercharger of the hydrogen internal combustion engine, and the second flow regulating valve is a valve for controlling the flow of supplementary air of the air filter of the hydrogen internal combustion engine.

2. The crankcase air supply control method according to claim 1, characterized in that: When the hydrogen concentration is less than the safety concentration threshold, the crankcase air filling control method further includes: obtaining a second moisture content of the air filter; controlling the first flow regulating valve and the second flow regulating valve to open to respective openings corresponding to second opening control parameters adapted to both the first moisture content and the second moisture content, wherein the opening of the first flow regulating valve in the second opening control parameters is not greater than the opening of the second flow regulating valve; When the third water content of the mixed gas is not less than a water content threshold, the mixed gas is introduced into a dryer, and when the third water content of the dried mixed gas is less than the water content threshold, the mixed gas is introduced into the crankcase.

3. The crankcase air supply control method according to any one of claims 1 or 2, characterized in that: Before introducing the mixed gas into the crankcase, the crankcase air supply control method further includes: When the temperature of the mixed gas is lower than the water separation temperature threshold, the mixed gas is introduced into the heating device, and when the temperature of the heated mixed gas is not lower than the water separation temperature threshold, the mixed gas is introduced into the crankcase.

4. A controller, characterized in that: include: at least one processor and a memory connected to the processor, wherein: The memory is used to store computer programs; The processor is configured to execute the computer program so as to enable the controller to implement the crankcase air replenishment control method according to any one of claims 1 to 3.

5. A crankcase air replenishment system, characterized in that: include: A first air supply pipeline, a second air supply pipeline, a third air supply pipeline, a first flow regulating valve, a second flow regulating valve, a four-way valve and a controller as claimed in claim 4; The first flow regulating valve is disposed in the first air supply line connected to the air outlet of the supercharger of the hydrogen internal combustion engine and the first end of the four-way valve. The second flow regulating valve is disposed in the second air supply line connected to the air outlet of the air filter of the hydrogen internal combustion engine and the second end of the four-way valve. The third end of the four-way valve is connected to the air supply port of the crankcase of the hydrogen internal combustion engine through the third air supply line. The first flow regulating valve is used to control the air supply flow of the supercharger; The second flow regulating valve is used to control the air supply flow of the air filter; The four-way valve is used to mix the gases output by the first flow regulating valve and the second flow regulating valve, and introduce the mixed gas into the crankcase; The controller is electrically connected to the first flow regulating valve, the second flow regulating valve and the four-way valve, respectively, and is used to control the first flow regulating valve and the second flow regulating valve, respectively, to open them to an opening corresponding to a first opening control parameter adapted to both the hydrogen concentration and the first water content of the crankcase, when the hydrogen concentration of the crankcase is not less than a safe concentration threshold, wherein the opening of the first flow regulating valve is greater than the opening of the second flow regulating valve; and is also used to control the first end, the second end and the third end of the four-way valve to be conductive, and the fourth end of the four-way valve to be closed.

6. The crankcase air supply system according to claim 5, characterized in that: The crankcase air supply system also includes: a dryer, wherein the fourth end of the four-way valve is connected to the inlet of the dryer, and the outlet of the dryer is connected to the first end or the second end; The controller is used to control the first flow regulating valve and the second flow regulating valve respectively to open to an opening corresponding to a second opening control parameter adapted to both the first moisture content and the second moisture content of the air filter when the hydrogen concentration is less than the safety concentration threshold, wherein the opening of the first flow regulating valve in the second opening control parameter is not greater than the opening of the second flow regulating valve; and is also used to control the first end, the second end, and the fourth end of the four-way valve to be conductive, and the third end to be opened to a minimum opening when the third moisture content of the mixed gas is not less than the moisture content threshold; and is also used to control the first end, the second end, and the third end of the four-way valve to be conductive, and the fourth end to be closed when the third moisture content of the mixed gas is less than the moisture content threshold.

7. The crankcase air supply system according to any one of claims 5 or 6, characterized in that: The crankcase air supply system also includes: A bypass valve and a heating device, wherein the bypass valve is connected in series to the third air supply pipeline, the bypass port of the bypass valve is connected to the inlet of the heating device, and the outlet of the heating device is connected to the inlet of the bypass valve; The controller is electrically connected to the bypass valve and the heating device, respectively, and is used to control the bypass valve outlet to open to the minimum opening, the bypass port to be connected, and the heating device to heat the mixed gas when the temperature of the mixed gas is lower than the water analysis temperature threshold; and is also used to control the bypass valve outlet to be connected, the bypass port to be closed, and the heating device to stop heating when the temperature of the heated mixed gas is not lower than the water analysis temperature threshold.

8. The crankcase air supply system according to claim 7, characterized in that: The heating device operates in an electric heating mode when the hydrogen internal combustion engine is in a power-on self-test state.

9. The crankcase air supply system according to claim 7, characterized in that: The heating device operates in an exhaust gas heating mode when the hydrogen internal combustion engine is in a loaded operating state.

10. A vehicle, characterized in that: include: A crankcase air injection system according to any one of claims 5 to 9.

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