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

Abstract

The application discloses a crankcase air supplement control method, a controller, a crankcase air supplement system and a vehicle, and relates to the field of hydrogen internal combustion engines.The method comprises the following steps: in the case that the hydrogen concentration is not less than a safety concentration threshold, the first flow regulating valve and the second flow regulating valve are controlled respectively, the first flow regulating valve and the second flow regulating valve are opened to the opening degree corresponding to the first opening degree control parameter which is adapted to the hydrogen concentration and the first water content, and the mixed gas output by the first flow regulating valve and the second flow regulating valve is introduced into the crankcase of the hydrogen internal combustion engine.The application adjusts the opening degree of the first flow regulating valve and the second flow regulating valve, realizes air supplement of the crankcase by using the air output by the supercharger and the air filter in the case that the hydrogen concentration is not less than the safety concentration threshold, and uses the high-temperature gas output by the supercharger to increase the temperature of the mixed gas, so that, compared with the existing air supplement mode by only using the supercharger, the phenomenon of engine oil emulsification is inhibited while avoiding the output power reduction of the hydrogen internal combustion engine.

Description

TECHNICAL FIELD

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

[0002] A hydrogen internal combustion engine is an internal combustion engine that uses hydrogen fuel (such as hydrogen gas or hydrogen-containing fuel) as fuel. Because the water content in the exhaust gas after the combustion of hydrogen fuel is relatively high, when the exhaust gas diffuses to the crankcase, water is easily separated due to the temperature difference, causing the oil in the crankcase to be emulsified, which reduces the lubricating effect of the oil and affects the operation reliability of the hydrogen internal combustion engine.

[0003] The existing crankcase air supplementing system suitable for hydrogen internal combustion engines mainly functions to guide the high-pressure gas output by a supercharger into the crankcase, thereby inhibiting the separation of water and the emulsification of oil by accelerating the outflow rate of air in the crankcase. However, excessive introduction of the gas output by the supercharger can cause the output power of the hydrogen internal combustion engine to decrease. Therefore, how to inhibit the emulsification of oil while avoiding a decrease in output power has become a problem to be solved. SUMMARY

[0004] In view of the above problems, the present application provides a crankcase air supplementing control method, a controller, a crankcase air supplementing system and a vehicle to achieve the purpose of inhibiting the emulsification of oil while avoiding a decrease in output power. The specific solutions are as follows:

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

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

[0007] in a case where the hydrogen concentration is not less than a safety concentration threshold, respectively controlling a first flow regulating valve and a second flow regulating valve to open to a first opening degree control parameter corresponding to the hydrogen concentration and the first water content, and guiding mixed gas mixed after the gas output by the first flow regulating valve and the second flow regulating valve into the crankcase of the hydrogen internal combustion engine, wherein the opening degree of the first flow regulating valve in the first opening degree control parameter is greater than the opening degree of the second flow regulating valve, the first flow regulating valve is a valve that controls the air supplementing flow of a supercharger of the hydrogen internal combustion engine, and the second flow regulating valve is a valve that controls the air supplementing flow of an air cleaner of the hydrogen internal combustion engine.

[0008] In a possible implementation, in a case where the hydrogen concentration is less than the safety concentration threshold, the crankcase air supplementing control method further comprises:

[0009] obtaining a second water content of the air cleaner;

[0010] respectively controlling the first flow regulating valve and the second flow regulating valve to open to an opening degree corresponding to a second opening degree control parameter adapted to both the first moisture content and the second moisture content, wherein the opening degree of the first flow regulating valve in the second opening degree control parameter is not greater than the opening degree of the second flow regulating valve;

[0011] in a case where the third moisture content of the mixed gas is not less than a moisture content threshold, introducing the mixed gas into a dryer, and in a case where the third moisture content of the mixed gas after drying is less than the moisture content threshold, introducing the mixed gas into the crankcase.

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

[0013] in a case where the temperature of the mixed gas is less than a water analysis out temperature threshold, introducing the mixed gas into a heating device, and in a case where the temperature of the mixed gas after heating is not less than the water analysis out temperature threshold, introducing the mixed gas into the crankcase.

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

[0015] The memory is configured to store a computer program;

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

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

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

[0019] The first flow regulating valve is arranged in the first air charging pipeline connecting the gas outlet of a supercharger of the hydrogen internal combustion engine and the first end of the four-way valve, the second flow regulating valve is arranged in the second air charging pipeline connecting the gas outlet of an air cleaner of the hydrogen internal combustion engine and the second end of the four-way valve, and the third end of the four-way valve is connected with the air charging port of the crankcase of the hydrogen internal combustion engine through the third air charging pipeline;

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

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

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

[0023] The controller is electrically connected with the first flow regulating valve, the second flow regulating valve and the four-way valve respectively, and is configured to, in a case where the hydrogen concentration in the crankcase is not less than a safety concentration threshold, control the first flow regulating valve and the second flow regulating valve to open to a first opening degree corresponding to a first opening degree control parameter adapted to the hydrogen concentration and a first water content rate of the crankcase, wherein the opening degree of the first flow regulating valve is greater than the opening degree of the second flow regulating valve; and control the first end, the second end and the third end of the four-way valve to be conducted, and the fourth end of the four-way valve to be closed.

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

[0025] A dryer, the fourth end of the four-way valve is in communication with an inlet of the dryer, and an outlet of the dryer is in communication with the first end or the second end;

[0026] The controller is configured to, in a case where the hydrogen concentration is less than the safety concentration threshold, control the first flow regulating valve and the second flow regulating valve to open to a second opening degree corresponding to a second opening degree control parameter adapted to the first water content rate and a second water content rate of the air filter, wherein the opening degree of the first flow regulating valve in the second opening degree control parameter is not greater than the opening degree of the second flow regulating valve; and control, in a case where a third water content rate of the mixed gas is not less than a water content rate threshold, the first end, the second end and the fourth end of the four-way valve to be conducted, and the third end to open to a minimum opening degree; and control, in a case where the third water content rate of the mixed gas is less than the water content rate threshold, the first end, the second end and the third end of the four-way valve to be conducted, and the fourth end to be closed.

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

[0028] A bypass valve and a heating device, the bypass valve is connected in series in the third air supplement pipeline, a bypass port of the bypass valve is in communication with an inlet of the heating device, and an outlet of the heating device is in communication with an inlet of the bypass valve;

[0029] The controller is electrically connected with the bypass valve and the heating device respectively, and is configured to control the outlet of the bypass valve to open to a minimum opening degree in a case that the temperature of the mixed gas is less than a water analysis temperature threshold, the bypass port is conducted, and the heating device is controlled to heat the mixed gas; and is further configured to control the outlet of the bypass valve to be conducted, the bypass port is closed, and the heating device is controlled to stop heating in a case that the temperature of the heated mixed gas is not less 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-checking 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 load running state.

[0032] The fourth aspect of the present application provides a vehicle, comprising the crankcase air supplementing system provided by the third aspect of the present application and any possible implementation of the third aspect. Through the above technical solution, the crankcase air supplementing control method, the controller, the crankcase air supplementing system and the vehicle provided by the present application, by configuring that the first flow regulating valve and the second flow regulating valve are respectively controlled to open to the opening degree corresponding to the first opening degree control parameter adapted to the hydrogen concentration and the first water content rate when the hydrogen concentration is not less than the safety concentration threshold, the ambient air is introduced from the air cleaner by the second flow regulating valve, the mixed gas input by the supercharger and the air cleaner is used for crankcase air supplementing, the air supplementing demand of the crankcase hydrogen concentration is met, and the risk of the output power of the hydrogen internal combustion engine under high load state caused by the air supplementing of the supercharger is avoided. And the first flow regulating valve and the second flow regulating valve are respectively controlled to open to the opening degree corresponding to the first opening degree control parameter adapted to the hydrogen concentration and the first water content rate, and the mixed gas output by the first flow regulating valve and the second flow regulating valve is introduced into the crankcase of the hydrogen internal combustion engine, so as to adjust the proportion of the supercharger output gas and the air cleaner output gas in the mixed gas, the high-temperature and dry gas output by the supercharger is used for heating the mixed gas, and the water content rate of the mixed gas is reduced, so as to inhibit the oil emulsification phenomenon. It can be seen that the present application avoids the output power drop while realizing the inhibition of the crankcase hydrogen concentration and the oil emulsification phenomenon. BRIEF DESCRIPTION OF DRAWINGS

[0033] The above and other features, advantages, and aspects of the present disclosure will become more apparent by referring to the following detailed description in conjunction with the accompanying drawings. Throughout the drawings, like or similar reference numerals are used to refer to like or similar elements throughout the various figures. It should be understood that the drawings are diagrammatic and schematic representation of elements and features do not necessarily depict the actual scale or proportions.

[0034] Figure 1A flow chart of a crankcase air charge control method provided by the present application;

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

[0036] Figure 3 A structural schematic diagram of a controller provided by the present application;

[0037] Figure 4 A structural schematic diagram of a crankcase air charge system provided by the present application;

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

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

[0040] The embodiments of the present application are described below in conjunction with the drawings of the embodiments of the present application. The terms used in the embodiment part 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 drawings. It is known to those of ordinary skill in the art that, as technology develops and new scenarios appear, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.

[0042] The terms "first", "second", and the like in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the terms used in this way can be interchanged under appropriate circumstances, and this is only a distinguishing way used in the description of the embodiments of the present application to describe the objects with the same attributes. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, so that the processes, methods, systems, products or equipment containing a series of units do not have to be limited to those units, but can include other units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0043] It should be noted that, compared with the prior art, the application achieves the purpose of inhibiting the oil emulsification phenomenon while avoiding the output power reduction of the hydrogen internal combustion engine in the actual application scenario. Specifically, the existing crankcase ventilation system is to guide the high-pressure gas output by the supercharger into the crankcase to reduce the hydrogen concentration in the crankcase and shorten the residual time of the gas in the crankcase by accelerating the air outflow rate in the crankcase, so as to avoid the oil emulsification phenomenon caused by the condensate water generated by the gas. However, as the load of the hydrogen internal combustion engine gradually increases, the hydrogen concentration in the crankcase also increases, and the air supply required by the crankcase also increases. In the case where the hydrogen concentration in the crankcase is higher than the safe concentration, the hydrogen internal combustion engine is also in a high load state (such as the output torque accounts for 70% to 100% of the maximum output torque). At this time, in order to ensure the stability of the output power of the hydrogen internal combustion engine in the high load state, the gas provided by the supercharger needs to be preferentially supplied to the hydrogen internal combustion engine, which leads to a decrease in the air intake amount for the crankcase air supply. The decrease in the air intake amount leads to a decrease in the rate at which the gas flows out of the crankcase. Since the gas in the crankcase contains water generated in the combustion process, when the gas outflow rate decreases, the temperature will cause the water in the gas to be analyzed before the gas flows out of the crankcase, thereby causing oil emulsification. The application controls the first flow regulating valve and the second flow regulating valve to be opened to the opening degree corresponding to the first opening degree control parameter adapted to the hydrogen concentration and the first water content, respectively, in the case where the hydrogen concentration is not less than the safe concentration threshold, and mixes the gases output by the first flow regulating valve and the second flow regulating valve and guides them into the crankcase of the hydrogen internal combustion engine, so as to use the mixed gas output by the supercharger and the air cleaner to supply air to the crankcase. Compared with the prior art, the use of the mixed gas output by the supercharger and the air cleaner to supply air to the crankcase reduces the occupation amount of the gas output by the supercharger, avoids the output power reduction of the hydrogen internal combustion engine, and meets the air supply demand of the crankcase. In addition, by controlling the first flow regulating valve and the second flow regulating valve to be opened to the opening degree corresponding to the first opening degree control parameter adapted to the hydrogen concentration and the first water content, respectively, the high-temperature gas output by the supercharger is used to dilute and heat the gas output by the air cleaner, so as to reduce the water content of the mixed gas while maintaining the temperature of the mixed gas, thereby inhibiting the oil emulsification phenomenon caused by the water analysis of the mixed gas flowing through the crankcase due to the too low temperature of the mixed gas. It can be seen that the application achieves the purpose of inhibiting the oil emulsification phenomenon while avoiding the output power reduction of the hydrogen internal combustion engine.

[0044] The first aspect of the application provides a crankcase air supply control method. Figure 1 As shown in the figure, the crankcase air supply control method comprises:

[0045] S101, obtaining the hydrogen concentration and the first water content of the crankcase of the hydrogen internal combustion engine.

[0046] It should be noted that in the actual application scenario, the hydrogen concentration of the crankcase 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 the hydrogen internal combustion engine, the products of the combustion of hydrogen fuel entering the combustion chamber of the hydrogen internal combustion engine mainly include water vapor and residual hydrogen fuel. The combustion products including water vapor and hydrogen fuel will enter the crankcase along the gaps in the hydrogen internal combustion engine under the action of external force (suction of the oil-gas separator, force of the piston). As the load of the hydrogen internal combustion engine gradually increases, the concentration of exhaust gas entering the crankcase gradually increases, thereby increasing the hydrogen concentration and the first water content of the crankcase.

[0047] S102, in the case that the hydrogen concentration is not less than the safety concentration threshold, respectively control the first flow regulating valve and the second flow regulating valve, open the opening degree corresponding to the first opening degree control parameter adapted to the hydrogen concentration and the first water content, and introduce the mixed gas mixed after the gas output by the first flow regulating valve and the second flow regulating valve into the crankcase of the hydrogen internal combustion engine, wherein the opening degree of the first flow regulating valve in the first opening degree control parameter is greater than the opening degree of the second flow regulating valve, the first flow regulating valve is a valve for controlling the air charge flow of the supercharger of the hydrogen internal combustion engine, and the second flow regulating valve is a valve for controlling the air charge flow of the air cleaner of the hydrogen internal combustion engine.

[0048] It should be noted that in the actual application scenario, the safety concentration threshold 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 the hydrogen internal combustion engine is tested and calibrated. Since the hydrogen concentration increases as the load increases, the case that the hydrogen concentration is not less than the safety concentration threshold indicates that the hydrogen internal combustion engine is currently in a high load 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 amount of gas output by the supercharger is adapted to the load state and is not unlimited, if too much gas output by the supercharger is used for air charging, it will reduce the amount of gas output by the supercharger for assisting the combustion of the hydrogen internal combustion engine, thereby affecting the stable operation of the hydrogen internal combustion engine. Therefore, by configuring the case that the hydrogen concentration is not less than the safety concentration threshold, the first flow regulating valve and the second flow regulating valve are respectively controlled to open the opening degree corresponding to the first opening degree control parameter adapted to the hydrogen concentration and the first water content, so as to introduce the ambient air from the air cleaner by the second flow regulating valve, thereby using the mixed gas input by the supercharger and the air cleaner for air charging of the crankcase, so as to meet the air charging demand of the crankcase for suppressing the hydrogen concentration, while avoiding the risk of reducing the output power of the hydrogen internal combustion engine in the high load state caused by air charging by the supercharger only.

[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 controls the first flow regulating valve and the second flow regulating valve respectively, opens to the opening degree corresponding to the first opening degree control parameter adapted to the hydrogen concentration and the first water content, and introduces the ambient air from the air cleaner by the second flow regulating valve, so as to use the mixed gas input by the supercharger and the air cleaner to supplement the crankcase, so as to meet the supplement demand of the hydrogen concentration in the crankcase while avoiding the risk of the output power reduction of the hydrogen internal combustion engine under high load caused by the supplement of the supercharger. The present application controls the first flow regulating valve and the second flow regulating valve respectively, opens to the opening degree corresponding to the first opening degree control parameter adapted to the hydrogen concentration and the first water content, and introduces the mixed gas output by the first flow regulating valve and the second flow regulating valve into the crankcase of the hydrogen internal combustion engine, so as to adjust the proportion of the supercharger output gas and the air cleaner output gas in the mixed gas, so as to heat the mixed gas by the high-temperature and dry gas output by the supercharger, and reduce the water content of the mixed gas, so as to inhibit the oil emulsification phenomenon. It can be seen that the present application can avoid the output power reduction while inhibiting the hydrogen concentration in the crankcase and the oil emulsification phenomenon.

[0052] In a possible implementation, in the case that the hydrogen concentration is less than the safety concentration threshold, the crankcase supplement control method further includes:

[0053] obtaining a second water content of the air cleaner;

[0054] controlling the first flow regulating valve and the second flow regulating valve respectively, and opening to the opening degree corresponding to the second opening degree control parameter adapted to the first water content and the second water content, wherein the opening degree of the first flow regulating valve in the second opening degree control parameter is not greater than the opening degree of the second flow regulating valve;

[0055] in the case that the third water content of the mixed gas is not less than the water content threshold, introducing the mixed gas into the dryer, and in the case that the third water content of the dried mixed gas is less than the water content threshold, introducing the mixed gas into the crankcase.

[0056] It should be noted that in the actual application scenario, the case that the hydrogen concentration is less than the safety concentration threshold represents that the hydrogen internal combustion engine is not in a high load state. Since the supercharger is easy to cause unstable and small amount of output gas when the hydrogen internal combustion engine is in a medium or low load state (such as the output torque accounts for 0% to 70% of the maximum output torque). Therefore, the present application controls the first flow regulating valve and the second flow regulating valve respectively, opens to the opening degree corresponding to the second opening degree control parameter adapted to the first water content and the second water content, and the opening degree of the first flow regulating valve in the second opening degree control parameter is not greater than the opening degree of the second flow regulating valve, so as to increase the proportion of the air cleaner output gas in the mixed gas, so as to ensure that the amount of the mixed gas meets the supplement demand of the crankcase.

[0057] It should be noted that in an actual application scenario, the second opening degree control parameter suitable for the first moisture content and the second moisture content can be a control parameter determined based on a calibration test. Specifically, the control hydrogen internal combustion engine can be operated under different load states under different ambient humidities, the opening degrees of the first flow regulating valve and the second flow regulating valve are adjusted in the process, and the occurrence of water analysis in the crankcase under different opening degree combinations is recorded. Based on the recorded results and the first moisture content and the second moisture content under the corresponding load state, the first control parameter corresponding to different first moisture content and second moisture content is determined.

[0058] It should be noted that in an actual application scenario, due to the increase of the proportion of the gas output by the air filter in the mixed gas, the moisture content of the mixed gas is at risk of rising, thereby causing the risk of oil emulsification caused by water analysis. Therefore, the present application controls the first flow regulating valve and the second flow regulating valve by configuring the second opening degree control parameter corresponding to the opening degree suitable for the first moisture content and the second moisture content, and collects the third moisture content of the mixed gas. In the case where the third moisture content of the mixed gas is not less than the moisture content threshold, the mixed gas is introduced into the dryer, and in the case where the third moisture content of the mixed gas after drying is less than the moisture content threshold, the mixed gas is introduced into the crankcase, so as to dry the mixed gas by using the dryer, thereby reducing the moisture content of the mixed gas entering the crankcase, and thereby realizing the inhibition of the oil emulsification phenomenon.

[0059] In a possible implementation, before the mixed gas is introduced into the crankcase, the crankcase air supply control method further comprises:

[0060] In the case where the temperature of the mixed gas is less than the water analysis temperature threshold, the mixed gas is introduced into the heating device, and in the case where the temperature of the mixed gas after heating is not less than the water analysis 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] Step S207, the mixed gas is introduced into the heating device for heating. And trigger step S205.

[0071] Step S208, the mixed gas is introduced into the crankcase.

[0072] Step S209, the mixed gas is introduced into the dryer for drying. And trigger step S206.

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

[0074] The memory is used for storing a computer program;

[0075] The processor is used for executing the computer program, so that the controller can realize the crankcase air charging control method provided by the first aspect of the present application and any possible implementation of the first aspect.

[0076] The structure diagram of the controller provided by the second aspect of the present application is shown in Figure 3 The controller in the embodiment of the present application can 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 only an example, and should not bring any limitation to the function and use range of the embodiment of the present application.

[0077] As shown in Figure 3 The controller can include a processing device (such as a central processing unit, a graphics processing unit, etc.) 301, which can perform various appropriate actions and processes according to the program stored in the read-only memory (ROM) 302 or the program loaded from the storage device 308 into the random access memory (RAM) 303. In the state that the controller is powered on, the RAM 303 also stores various programs and data required for the operation of the controller. The processing device 301, the ROM 302 and the RAM 303 are connected with each other through a bus 304. An input / output (I / O) interface 305 is also connected to the bus 304.

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

[0079] The third aspect of the present application provides a crankcase air charging system, as shown, the crankcase air charging system comprises: Figure 4 The third aspect of the present application provides a crankcase air charging system, as shown, the crankcase air charging system comprises:

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

[0081] The first flow regulating valve 404 is arranged in the first air charging pipeline 401 which is connected to the air outlet of the supercharger of the hydrogen internal combustion engine and the first end of the four-way valve 406, the second flow regulating valve 405 is arranged in the second air charging pipeline 402 which is connected to the air outlet of the air cleaner of the hydrogen internal combustion engine and the second end of the four-way valve 406, and the third end of the four-way valve 406 is connected to the air charging port of the crankcase of the hydrogen internal combustion engine through the third air charging pipeline 403;

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

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

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

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

[0086] In a possible implementation, the concentration of the crankcase can be collected by a hydrogen concentration sensor disposed in the crankcase and electrically connected to the controller 407. The first moisture content can be collected by a moisture content sensor disposed in the crankcase and electrically connected to the controller 407.

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

[0088] a dryer, the fourth end of the four-way valve 406 is in communication with an inlet of the dryer, and an outlet of the dryer is in communication with the first end or the second end;

[0089] The controller 407 is configured to, in the case that the hydrogen concentration is less than the safety concentration threshold, control the first flow regulating valve 404 and the second flow regulating valve 405 to open to the second opening degree control parameter corresponding to the second moisture content and the first moisture content, wherein the opening degree of the first flow regulating valve 404 in the second opening degree control parameter is not greater than the opening degree of the second flow regulating valve 405. The controller 407 is further configured to, in the case that the third moisture content of the mixed gas is not less than the moisture content threshold, 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 open to the minimum opening degree. The controller 407 is further configured to, in the case that the third moisture content of the mixed gas is less than the moisture content threshold, 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.

[0090] It should be noted that, in an actual application scenario, the second moisture content can be collected by a moisture content sensor disposed in the second gas supplement pipeline 402 and electrically connected to the controller 407. The third moisture content can be collected 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 an actual application scenario, the connection relationship of the dryer can be as shown in Figure 5 . Among them, Figure 5 the connection relationship of the other devices except the dryer is the same as Figure 4 . The fourth end of the four-way valve 406 of the dryer is in communication with an inlet of the dryer 408, and an outlet of the dryer 408 is in communication with the second end of the four-way valve 406. In the case that 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 conductive, at this time, the flow direction of the mixed gas is as shown in Figure 5The middle arrow indicates that the fourth end of the four-way valve 406 flows into the inlet of the dryer 408, and the outlet of the dryer 408 flows to the second end of the four-way valve 406. It should be noted that, since the first flow regulating valve 404 and the second flow regulating valve 405 continuously deliver gas to the four-way valve 406 during the operation of the crankcase gas charging system, if the third end is completely closed, the gas pressure in the first gas charging pipeline 401, the second gas charging pipeline 402 and the four-way valve 406 will gradually increase, which may cause damage to the device. Therefore, the third end is configured to be opened to a minimum opening degree, so that the mixed gas drying effect is ensured, and the third end is used for pressure relief to avoid device damage and improve the operation reliability of the crankcase gas charging system.

[0092] It should be noted that in actual application scenarios, the type of the above dryer can be various, including but not limited to: adsorption dryer, refrigeration dryer, membrane dryer, etc. Preferably, the above dryer can adopt a double-tower adsorption dryer, which is provided with two groups of drying devices. In the case that one group of drying devices is saturated and invalid, the other group of drying devices takes over the drying, and the saturated drying devices start to regenerate and remove water, thereby ensuring the continuity and reliability of the drying process. In one possible implementation, the third aspect and any one of the possible implementations of the third aspect of the present application provide a crankcase gas charging system further comprising:

[0093] a bypass valve and a heating device, the bypass valve is connected in series in the third gas charging pipeline 403, the bypass port of the bypass valve is in communication with the inlet of the heating device, and the outlet of the heating device is in communication with the inlet of the bypass valve;

[0094] the controller 407 is electrically connected with the bypass valve and the heating device, respectively, for controlling the outlet of the bypass valve to open to a minimum opening degree and the bypass port to be conductive when the temperature of the mixed gas is less than the water boiling temperature threshold, and controlling the heating device to heat the mixed gas; and for controlling the outlet of the bypass valve to be conductive and the bypass port to be closed when the temperature of the heated mixed gas is not less than the water boiling temperature threshold, and controlling the heating device to stop heating.

[0095] It should be noted that in actual application scenarios, since mixed gas continuously exists in the third gas charging pipeline 403 during the operation of the crankcase gas charging system. Therefore, the outlet of the bypass valve is configured to be opened to a minimum opening degree, so that the heating effect of the mixed gas is ensured, and the outlet of the bypass valve is used for pressure relief to avoid device damage and improve the operation reliability of the crankcase gas charging system.

[0096] For the purpose of understanding the structure of the crankcase gas charging system provided by the third aspect and any one of the possible implementations of the third aspect of the present application, one possible implementation of the present application is described as follows:

[0097] As shown in FIG. 4, the third aspect of the present application provides a crankcase gas charging system, which comprises:Figure 6 As shown in the figure, it is a structural schematic diagram of a crankcase air charging system. The crankcase air charging system is applied to a hydrogen internal combustion engine, which comprises a supercharger, an air filter, a combustion chamber, a crankcase, an oil pan and an oil-gas separator. A first air outlet of the air filter is in communication with a first air inlet of the supercharger through a pipeline, an exhaust outlet of the oil-gas separator is in communication with a second air inlet of the supercharger through a pipeline, a first air outlet of the supercharger is in communication with an air inlet of the combustion chamber, the combustion chamber, the crankcase and the oil pan form an integral whole, an exhaust outlet of the crankcase is in communication with an air inlet of the oil-gas separator, and an oil outlet of the oil-gas separator is in communication with an oil inlet of the oil pan. A second air outlet of the supercharger is in communication with a first end of a four-way valve 406 through a first air charging pipeline 401, a second air outlet of the air filter is in communication with a second end of the four-way valve 406 through a second air charging pipeline 402, a third end of the four-way valve 406 is in communication with an air inlet of a bypass valve 409 through a third air charging pipeline 403, and an air outlet of the bypass valve 409 is in communication with an air charging inlet of the crankcase through the third air charging pipeline 403. A fourth end of the four-way valve 406 is in communication with an inlet of a dryer 408, an outlet of the dryer 408 is in communication with the second end of the four-way valve 406, a bypass outlet of the bypass valve 409 is in communication with an inlet of a heating device 410, and an outlet of the heating device 410 is in communication with the air inlet of the bypass valve 409. A first flow regulating valve 404 is arranged in the first air charging pipeline 401, and a second flow regulating valve 405 is arranged in the second air charging pipeline 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 electrically connected to a 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-checking 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 load running state.

[0100] It should be noted that, in an actual application scenario, when the hydrogen internal combustion engine is in a power-on self-checking state, the hydrogen internal combustion engine has not entered a running or idling running state, and at this time, the temperature of the gas output by the supercharger is relatively low. Therefore, the present application configures the heating device to operate in an electric heating mode when the hydrogen internal combustion engine is in a power-on self-checking state and to operate in an exhaust gas heating mode when the hydrogen internal combustion engine is in a load running state, so as to ensure that the hydrogen internal combustion engine can achieve suppression of the oil emulsification phenomenon in all states, and the energy utilization rate is also improved.

[0101] The fourth aspect of the present application provides a vehicle, which comprises the crankcase air charging system provided in the third aspect and any possible implementation of the third aspect.

[0102] The embodiment of the present application further provides a computer program product comprising computer readable instructions, which, when executed on an electronic device, cause the electronic device to implement any of the crankcase gas compensation control methods provided by the embodiments of the present application.

[0103] The embodiment of the present application further provides a computer readable storage medium, which carries one or more computer programs, which, when executed by a controller, can cause the controller to implement any of the crankcase gas compensation control methods provided by the embodiments of the present application.

[0104] In addition, it should be noted that the apparatus embodiments described above are merely illustrative, wherein the units described as separate components can or can not be physically separate, and the components displayed as units can or can not be physical units, that is, they can be located in one place, or can be distributed on multiple network units. Part or all of the modules can be selected according to actual needs to achieve the purpose of the embodiments. In addition, the connection relationship between the modules in the apparatus embodiments provided by the present application indicates that there is a communication connection between them, which can be 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 realized by means of software and necessary general hardware, and of course can also be realized by special hardware including special integrated circuits, special CPUs, special memories, special components, etc. Generally, functions completed by computer programs can be easily realized by corresponding hardware, and specific hardware structures for realizing the same function can also be various, such as analog circuits, digital circuits or special circuits. However, for the present application, software program implementation is a better embodiment. Based on this understanding, the technical solutions of the present application 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, U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk, etc., including a plurality of instructions to make a computer device (which can be a personal computer, training device, or network device, etc.) execute the methods described in various embodiments of the present application.

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

[0107] The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are 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 one website, computer, training device or data center to another website, computer, training device or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be stored by the computer or a data storage device such as a training device, a data center, etc. integrated with one or more available media sets. The available media can be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)), etc.

Claims

1. A method of controlling a crankcase ventilation, characterized by, The method comprises: obtaining a hydrogen concentration and a first water content of a crankcase of a hydrogen internal combustion engine; in a case where the hydrogen concentration is not less than a safety concentration threshold, respectively controlling a first flow regulating valve and a second flow regulating valve to open to an opening degree corresponding to a first opening degree control parameter adapted to both the hydrogen concentration and the first water content, and introducing a mixed gas obtained by mixing gases output from the first flow regulating valve and the second flow regulating valve into the crankcase of the hydrogen internal combustion engine, wherein the first opening degree control parameter is a control parameter determined based on a calibration test, and an opening degree of the first flow regulating valve in the first opening degree control parameter is greater than an opening degree of the second flow regulating valve, and the first flow regulating valve is a valve that controls a charge air flow of a supercharger of the hydrogen internal combustion engine, and the second flow regulating valve is a valve that controls a charge air flow of an air cleaner of the hydrogen internal combustion engine.

2. The crankcase gas control method according to claim 1, characterized by, in a case where the hydrogen concentration is less than the safety concentration threshold, the method further comprises: obtaining a second water content of the air cleaner; respectively controlling the first flow regulating valve and the second flow regulating valve to open to an opening degree corresponding to a second opening degree control parameter adapted to both the first water content and the second water content, wherein the second opening degree control parameter is a control parameter determined based on a calibration test, and an opening degree of the first flow regulating valve in the second opening degree control parameter is not greater than an opening degree of the second flow regulating valve; in a case where a third water content of the mixed gas is not less than a water content threshold, introducing the mixed gas into a drier, and in a case where the third water content of the mixed gas after drying is less than the water content threshold, introducing the mixed gas into the crankcase.

3. The crankcase gas control method according to any one of claims 1 or 2, characterized by, before the mixed gas is introduced into the crankcase, the method further comprises: in a case where a temperature of the mixed gas is less than a water analysis-out temperature threshold, introducing the mixed gas into a heating device, and in a case where the temperature of the mixed gas after heating is not less than the water analysis-out temperature threshold, introducing the mixed gas into the crankcase.

4. A controller characterized by comprising: The method comprises: at least one processor and a memory connected to the processor, wherein: the memory is configured to store a computer program; the processor is configured to execute the computer program to enable the controller to implement the crankcase charge air control method according to any one of claims 1 to 3.

5. A crankcase ventilation system characterized in that, The method comprises: a first charge air pipeline, a second charge air pipeline, a third charge air pipeline, a first flow regulating valve, a second flow regulating valve, a four-way valve, and a controller according to claim 4; the first flow regulating valve is disposed in the first charge air pipeline that connects 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 the second charge air pipeline that connects an air outlet of an air cleaner of the hydrogen internal combustion engine and a second end of the four-way valve, and a third end of the four-way valve is connected to a charge air inlet of a crankcase of the hydrogen internal combustion engine through the third charge air pipeline; the first flow regulating valve is configured to control a charge air flow of the supercharger; The second flow regulating valve is configured to control the air supplement flow of the air filter; The four-way valve is configured to mix the gas output by the first flow regulating valve and the second flow regulating valve, and to guide the mixed gas into the crankcase; The controller is electrically connected with the first flow regulating valve, the second flow regulating valve, and the four-way valve, respectively, and is configured to, in a case where the hydrogen concentration in the crankcase is not less than a safety concentration threshold, control the first flow regulating valve and the second flow regulating valve to open to a first opening degree corresponding to first opening degree control parameters adapted to the hydrogen concentration and a first water content of the crankcase, respectively, wherein the first opening degree control parameters are control parameters determined based on a calibration test, and the opening degree of the first flow regulating valve is greater than that of the second flow regulating valve; and 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 gas refilling system according to claim 5, characterized in that, The crankcase air supplement system further comprises: a dryer, the fourth end of the four-way valve being in communication with an inlet of the dryer, and an outlet of the dryer being in communication with the first end or the second end; The controller is configured to, in a case where the hydrogen concentration is less than the safety concentration threshold, control the first flow regulating valve and the second flow regulating valve to open to a second opening degree corresponding to second opening degree control parameters adapted to the first water content and a second water content of the air filter, respectively, wherein the second opening degree control parameters are control parameters determined based on a calibration test, and the opening degree of the first flow regulating valve in the second opening degree control parameters is not greater than that of the second flow regulating valve; and to, in a case where a third water content of the mixed gas is not less than a water content threshold, control the first end, the second end, and the fourth end of the four-way valve to be conductive, and the third end to open to a minimum opening degree; and to, in a case where the third water content of the mixed gas is less than the water content threshold, 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.

7. - The crankcase gas refilling system according to any of claims 5 or 6, characterized in that, The crankcase air supplement system further comprises: a bypass valve and a heating device, the bypass valve being connected in series in the third air supplement pipeline, a bypass port of the bypass valve being in communication with an inlet of the heating device, and an outlet of the heating device being in communication with an inlet of the bypass valve; The controller is electrically connected with the bypass valve and the heating device, respectively, and is configured to, in a case where a temperature of the mixed gas is less than a water analysis-out temperature threshold, control the outlet of the bypass valve to open to a minimum opening degree, the bypass port to be conductive, and the heating device to heat the mixed gas; and to, in a case where the temperature of the mixed gas after heating is not less than the water analysis-out temperature threshold, control the outlet of the bypass valve to be conductive, the bypass port to be closed, and the heating device to stop heating.

8. - Crankcase gas refilling 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-checking state.

9. The crankcase gas porting system of claim 7 wherein, The heating device operates in an exhaust gas heating mode when the hydrogen internal combustion engine is in a load operation state.

10. A vehicle characterized by comprising: The crankcase air supplement system comprises: The crankcase air supplement system according to any one of claims 5 to 9.

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