Hydrogen internal combustion engine crankcase ventilation system, crankcase ventilation control method and controller

Abstract

The invention discloses a crankcase ventilation system of a hydrogen internal combustion engine, a crankcase ventilation control method and a controller, and relates to the field of hydrogen internal combustion engines. The method comprises the steps that a first flow adjusting valve and a second flow adjusting valve are controlled to be opened to the opening degree matched with the water content of a crankcase and the load state of the hydrogen internal combustion engine; and under the condition that the moisture content of the gas in the first ventilation pipeline is larger than a moisture content threshold value, the first bypass valve is controlled to guide the gas into the first dryer, and / or under the condition that the moisture content of the gas in the second ventilation pipeline is larger than the moisture content threshold value, the second bypass valve is controlled to guide the gas into the second dryer. On the basis of adjusting the first flow adjusting valve and the second flow adjusting valve, the opening degrees of the first flow adjusting valve and the second flow adjusting valve are matched with the water content of the crankcase and the load state of the hydrogen internal combustion engine, the crankcase ventilation requirement is met under the condition that the output power of the hydrogen internal combustion engine is not affected, and the water content of gas entering the crankcase is reduced through the first dryer and the second dryer; the inhibition effect on an engine oil emulsification phenomenon is improved.

Description

Technical Field

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

[0002] A hydrogen internal combustion engine is an internal combustion engine that 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, it is prone to water separation due to temperature differences, causing the oil in the crankcase to emulsify. This oil emulsification reduces the lubricating effect of the oil, affecting the operating reliability of the hydrogen internal combustion engine.

[0003] Existing crankcase ventilation systems for hydrogen internal combustion engines primarily increase crankcase air flow to suppress the rise in hydrogen concentration within the crankcase. However, simply increasing air flow makes existing crankcase ventilation systems less effective at suppressing oil emulsification, reducing the operating reliability of hydrogen internal combustion engines. Summary of the Invention

[0004] In view of the above problems, this application provides a hydrogen internal combustion engine crankcase ventilation system, crankcase ventilation control method and controller to achieve the purpose of improving the suppression effect of oil emulsification and the operating reliability of hydrogen internal combustion engines. The specific solution is as follows:

[0005] A first aspect of the present application provides a hydrogen internal combustion engine crankcase ventilation system, comprising:

[0006] A first ventilation duct, a second ventilation duct, a first flow regulating valve, a second flow regulating valve, a first bypass valve, a second bypass valve, a first dryer, a second dryer, and a controller;

[0007] The first ventilation duct is connected to the air outlet of the supercharger of the hydrogen internal combustion engine and the air supply port of the crankcase, and the second ventilation duct is connected to the air outlet of the air filter of the hydrogen internal combustion engine and the air supply port of the crankcase;

[0008] The first flow regulating valve and the first bypass valve are sequentially arranged in the first ventilation duct along the air flow direction, and the second flow regulating valve and the second bypass valve are sequentially arranged in the second ventilation duct along the air flow direction;

[0009] The inlet of the first dryer is communicated with the bypass port of the first bypass valve, the outlet of the first dryer bypasses the first ventilation duct, the inlet of the second dryer is communicated with the bypass port of the second bypass valve, and the outlet of the second dryer bypasses the second ventilation duct;

[0010] The controller is electrically connected to the first flow regulating valve, the second flow regulating valve, the first bypass valve and the second bypass valve, respectively, and is used to control the first flow regulating valve and the second flow regulating valve, respectively, to open to an opening that is adapted to the water content of the crankcase and the load state of the hydrogen internal combustion engine; and is also used to control the air outlet of the first bypass valve to open to a minimum opening and the bypass port of the first bypass valve to be connected when the water content of the gas in the first ventilation duct is greater than a water content threshold, and / or control the air outlet of the second bypass valve to open to a minimum opening and the bypass port of the second bypass valve to be connected when the water content of the gas in the second ventilation duct is greater than the water content threshold.

[0011] In one possible implementation, the hydrogen internal combustion engine crankcase ventilation system further includes:

[0012] a third bypass valve and a fourth bypass valve, wherein the third bypass valve is connected in series between the bypass port of the first bypass valve and the inlet of the first dryer, and the bypass port of the third bypass valve is communicated with the inlet of the second dryer; and the fourth bypass valve is connected in series between the bypass port of the second bypass valve and the inlet of the second dryer, and the bypass port of the fourth bypass valve is communicated with the inlet of the first dryer;

[0013] The controller is electrically connected to the third bypass valve and the fourth bypass valve, respectively, and is used to control the air outlet of the third bypass valve to be closed and the bypass port of the third bypass valve to be connected when the first dryer fails, or to control the air outlet of the fourth bypass valve to be closed and the bypass port of the fourth bypass valve to be connected when the second dryer fails.

[0014] In one possible implementation, the hydrogen internal combustion engine crankcase ventilation system further includes:

[0015] a heating device, wherein a first air inlet of the heating device is in communication with an air outlet of the first ventilation duct, a second air inlet of the heating device is in communication with an air outlet of the second ventilation duct, and an air outlet of the heating device is in communication with an air supply port of the crankcase;

[0016] The controller is electrically connected to the heating device and is used to control the heating device to start heating when the temperature of the gas output from the air outlet is lower than the water analysis threshold; and is also used to control the heating device to stop heating when the temperature of the gas output from the air outlet is not lower than the water analysis threshold.

[0017] In one possible implementation, the heating device includes:

[0018] a temperature sensor, a fifth bypass valve, an air guide pipe, and a heater, wherein a first end of the air guide pipe is respectively connected to the first air inlet and the second air inlet, and a second end of the air guide pipe is connected to the air outlet of the heating device. The temperature sensor and the fifth bypass valve are sequentially arranged in the air guide pipe along the gas flow direction, a bypass port of the fifth bypass valve is connected to the air inlet of the heater, and an air outlet of the heater bypasses the air guide pipe between the first end and the temperature sensor.

[0019] The controller is electrically connected to the temperature sensor, the fifth bypass valve and the heater, respectively, and is used to control the gas outlet of the fifth bypass valve to open to the minimum opening, control the bypass port of the fifth bypass valve to be conductive, and control the heater to start heating when the gas temperature collected by the temperature sensor is lower than the water analysis threshold; and is also used to control the gas outlet of the fifth bypass valve to fully open, control the bypass port of the fifth bypass valve to be closed, and control the heater to stop heating when the gas temperature is lower than the water analysis threshold.

[0020] A second aspect of the present application provides a crankcase ventilation control method, which is applied to a controller in a crankcase ventilation system of a hydrogen internal combustion engine. The crankcase ventilation system of the hydrogen internal combustion engine is the crankcase ventilation system of the hydrogen internal combustion engine provided in the first aspect of the present application and any possible implementation of the first aspect. The crankcase ventilation control method includes:

[0021] obtaining a load state of the hydrogen internal combustion engine, a water content of the crankcase, a water content of gas in the first ventilation duct, and a water content of gas in the second ventilation duct;

[0022] respectively controlling the first flow regulating valve and the second flow regulating valve to open to an opening degree adapted to the water content of the crankcase and the load state;

[0023] When the moisture content of the gas in the first ventilation duct is greater than a moisture content threshold, the first bypass valve is controlled to direct the gas in the first ventilation duct into the first dryer, and when the moisture content of the gas after drying is not greater than the moisture content threshold, the dried gas is directed into the air supply port of the crankcase; and / or when the moisture content of the gas in the second ventilation duct is greater than the moisture content threshold, the second bypass valve is controlled to direct the gas in the second ventilation duct into the second dryer, and when the moisture content of the gas after drying is not greater than the moisture content threshold, the dried gas is directed into the air supply port of the crankcase.

[0024] In one possible implementation, the hydrogen internal combustion engine crankcase ventilation system further includes:

[0025] a third bypass valve and a fourth bypass valve, wherein the third bypass valve is connected in series between the bypass port of the first bypass valve and the inlet of the first dryer, and the bypass port of the third bypass valve is communicated with the inlet of the second dryer; and the fourth bypass valve is connected in series between the bypass port of the second bypass valve and the inlet of the second dryer, and the bypass port of the fourth bypass valve is communicated with the inlet of the first dryer;

[0026] The crankcase ventilation control method further includes:

[0027] When the moisture removal rate of the first dryer is less than a moisture removal threshold, the third bypass valve is controlled to direct the gas in the first ventilation duct into the second dryer, and when the moisture content of the dried gas is not greater than the moisture content threshold, the gas is directed through the second ventilation duct to the air supply port of the crankcase;

[0028] Alternatively, when the moisture removal rate of the second dryer is less than the moisture removal threshold, the fourth bypass valve is controlled to introduce the gas in the second ventilation duct into the first dryer, and when the gas moisture content of the dried gas is not greater than the moisture content threshold, the gas is introduced into the air supply port of the crankcase through the first ventilation duct.

[0029] In one possible implementation, the hydrogen internal combustion engine crankcase ventilation system further includes:

[0030] a heating device, wherein a first air inlet of the heating device is in communication with an air outlet of the first ventilation duct, a second air inlet of the heating device is in communication with an air outlet of the second ventilation duct, and an air outlet of the heating device is in communication with an air supply port of the crankcase;

[0031] The crankcase ventilation control method further includes:

[0032] When the temperature of the mixed gas output from the air outlet is lower than the water separation threshold, the heating device is used to heat the mixed gas, and when the temperature of the mixed gas output from the air outlet is not lower than the water separation threshold, the heating device is controlled to stop heating.

[0033] In a possible implementation, respectively controlling the first flow regulating valve and the second flow regulating valve to open to openings adapted to both the water content of the crankcase and the load state includes:

[0034] When the load state represents a high load state, searching for first candidate opening control parameters adapted to the high load state, and searching for a first opening control parameter adapted to the water content of the crankcase among the first candidate opening control parameters; controlling the first flow regulating valve to open to a first opening among the first opening control parameters, and controlling the second flow regulating valve to open to a second opening among the first opening control parameters, wherein the first opening is greater than the second opening;

[0035] When the load state represents a low load state, each second alternative opening control parameter adapted to the low load state is searched, and a second opening control parameter adapted to the water content of the crankcase is searched among each second alternative opening control parameter; the first flow regulating valve is controlled to open to a third opening among the second opening control parameters, and the second flow regulating valve is controlled to open to a fourth opening among the second opening control parameters, wherein the third opening is smaller than the fourth opening.

[0036] In one possible implementation, the heating device includes:

[0037] a temperature sensor, a fifth bypass valve, an air guide pipe, and a heater, wherein a first end of the air guide pipe is respectively connected to the first air inlet and the second air inlet, and a second end of the air guide pipe is connected to the air outlet of the heating device. The temperature sensor and the fifth bypass valve are sequentially arranged in the air guide pipe along the gas flow direction, a bypass port of the fifth bypass valve is connected to the air inlet of the heater, and an air outlet of the heater bypasses the air guide pipe between the first end and the temperature sensor.

[0038] When the temperature of the mixed gas output from the air outlet is lower than a water separation threshold, the heating device is used to heat the mixed gas, and when the temperature of the mixed gas output from the air outlet is not lower than the water separation threshold, the heating device is controlled to stop heating, including:

[0039] When the temperature of the mixed gas is lower than the water separation threshold, the fifth bypass valve is controlled to introduce the mixed gas in the gas guide line into the heater; and when the temperature of the heated mixed gas is not lower than the water separation threshold, the fifth bypass valve is controlled to introduce the heated mixed gas into the air supply port of the crankcase.

[0040] A third aspect of the present application provides a controller, comprising at least one processor and a memory connected to the processor, wherein:

[0041] The memory is used to store computer programs;

[0042] The processor is used to execute the computer program so that the controller can implement the crankcase ventilation control method provided in the second aspect of the present application and any possible implementation of the second aspect.

[0043] By means of the above technical scheme, the present application provides a hydrogen internal combustion engine crankcase ventilation system, crankcase ventilation control method and controller, which are configured by configuring a first ventilation duct to connect the supercharger outlet of the hydrogen internal combustion engine with the air supply port of the crankcase, a second ventilation duct to connect the air outlet of the air filter of the hydrogen internal combustion engine with the air supply port of the crankcase, a first flow regulating valve and a first bypass valve are sequentially arranged in the first ventilation duct along the air flow direction, a second flow regulating valve and a second bypass valve are sequentially arranged in the second ventilation duct along the air flow direction, an inlet of the first dryer is connected to the bypass port of the first bypass valve, and the outlet of the first dryer bypasses the first ventilation duct, an inlet of the second dryer is connected to the bypass port of the second bypass valve, and the outlet of the second dryer bypasses the second ventilation duct, thereby providing a system for taking air from the supercharger and the air filter respectively and drying the taken air. Subsequently, by configuring the first and second flow control valves to be opened to openings that are compatible with the crankcase moisture content and the load state of the hydrogen internal combustion engine, the gas flow rates provided by the supercharger and air filter are adjusted according to the load state of the hydrogen internal combustion engine. Compared to the existing method of relying solely on supercharger ventilation, this method avoids excessive use of supercharger output gas, which may result in a decrease in the output power of the hydrogen internal combustion engine, while still meeting the crankcase ventilation requirements. Furthermore, by configuring the first bypass valve to open to a minimum opening and open the bypass port of the first bypass valve when the moisture content of the gas in the first ventilation duct is greater than a moisture content threshold, and / or by configuring the second bypass valve to open to a minimum opening and open the bypass port of the second bypass valve when the moisture content of the gas in the second ventilation duct is greater than a moisture content threshold, the first and second dryers are used to dry the gas in their respective connected ventilation ducts, thereby reducing the moisture content of the gas ultimately entering the crankcase and suppressing oil emulsification. It can be seen that the present application improves the effect of suppressing the emulsification of the crankcase oil and improves the operating reliability of the hydrogen internal combustion engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] 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.

[0045] Figure 1 This is a schematic structural diagram of a hydrogen internal combustion engine crankcase ventilation system provided in this application;

[0046] Figure 2A gas flow diagram provided for this application;

[0047] Figure 3 A schematic diagram of gas flow in a heating device provided in this application;

[0048] Figure 4 This is a schematic structural diagram of a hydrogen internal combustion engine crankcase ventilation system provided in this application;

[0049] Figure 5 A flow chart of a crankcase ventilation control method provided in this application;

[0050] Figure 6 A flow chart of a crankcase ventilation control method provided for one possible implementation of the present application;

[0051] Figure 7 This is a schematic diagram of the structure of the controller provided in this application. DETAILED DESCRIPTION

[0052] 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.

[0053] 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.

[0054] 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.

[0055] It should be noted that, in actual application scenarios, compared with existing crankcase ventilation systems, this application achieves an improved effect of suppressing the emulsification of crankcase oil under the influence of the external environment and the load state of the hydrogen internal combustion engine. Specifically: In order to improve the inhibitory effect on the increase in hydrogen concentration in the crankcase, the existing crankcase ventilation system usually connects the crankcase air supply port with the air outlet of the supercharger to accelerate the exchange efficiency of the gas inside the crankcase by using high-pressure gas. For a crankcase ventilation system that uses the outlet gas of the supercharger as the air source, the hydrogen concentration in the crankcase will increase when the hydrogen internal combustion engine is in a high-load state. At this time, the intake flow requirements of the crankcase and the hydrogen internal combustion engine will increase. If the intake flow of the crankcase is increased, the output power of the hydrogen internal combustion engine will decrease. If the intake flow of the hydrogen internal combustion engine is increased, the hydrogen concentration in the crankcase will increase, increasing the risk of deflagration. The present application, however, configures a first ventilation duct connected to the supercharger outlet and a second ventilation duct connected to the air filter outlet, and configures a controller to control the first flow regulating valve and the second flow regulating valve, respectively, to open to an opening suitable for the water content of the crankcase and the load state of the hydrogen internal combustion engine. Compared to the existing method of supplying air only by the supercharger, the present application utilizes the gas output by the air filter and the supercharger for crankcase ventilation, thereby meeting the crankcase ventilation requirements while avoiding the risk of excessive occupation of the supercharger's gas output, which would result in a decrease in the output power of the hydrogen internal combustion engine. Furthermore, due to the influence of the external humidity, the gas output by the supercharger and the air filter has a high water content. When the gas with a high water content enters the crankcase, it will be affected by the temperature and water vapor will condense, which in turn causes oil emulsification inside the crankcase. Therefore, the present application controls the opening of the first bypass valve to its minimum opening when the moisture content of the gas in the first ventilation duct exceeds a moisture content threshold, and / or controls the opening of the second bypass valve to its minimum opening when the moisture content of the gas in the second ventilation duct exceeds a moisture content threshold, and thereby directs the gas in the corresponding ventilation ducts to the first dryer and the second dryer, respectively. The first dryer and the second dryer reduce the moisture content of the gas entering the crankcase, thereby suppressing oil emulsification. This improves the suppressing effect of crankcase oil emulsification and enhances the operational reliability of the hydrogen internal combustion engine.

[0056] The first aspect of the present application provides a hydrogen internal combustion engine crankcase ventilation system, such as Figure 1 As shown, the crankcase ventilation system of the hydrogen internal combustion engine includes:

[0057] A first ventilation duct 101, a second ventilation duct 102, a first flow regulating valve 103, a second flow regulating valve 104, a first bypass valve 105, a second bypass valve 106, a first dryer 107, a second dryer 108 and a controller 109;

[0058] The first ventilation duct 101 connects the air outlet of the supercharger of the hydrogen internal combustion engine with the air supply port of the crankcase, and the second ventilation duct 102 connects the air outlet of the air filter of the hydrogen internal combustion engine with the air supply port of the crankcase;

[0059] The first flow regulating valve 103 and the first bypass valve 105 are sequentially arranged in the first ventilation duct 101 along the air flow direction, and the second flow regulating valve 104 and the second bypass valve 106 are sequentially arranged in the second ventilation duct 102 along the air flow direction;

[0060] The inlet of the first dryer 107 is communicated with the bypass port of the first bypass valve 105 , and the outlet of the first dryer 107 bypasses the first ventilation duct 101 . The inlet of the second dryer 108 is communicated with the bypass port of the second bypass valve 106 , and the outlet of the second dryer 108 bypasses the second ventilation duct 102 .

[0061] The controller 109 is electrically connected to the first flow regulating valve 103, the second flow regulating valve 104, the first bypass valve 105 and the second bypass valve 106, respectively, and is used to control the first flow regulating valve 103 and the second flow regulating valve 104, respectively, to open to an opening that is adapted to the water content of the crankcase and the load state of the hydrogen internal combustion engine; it is also used to control the outlet of the first bypass valve 105 to open to the minimum opening and the bypass port of the first bypass valve 105 to be connected when the water content of the gas in the first ventilation duct 101 is greater than the water content threshold, and / or control the outlet of the second bypass valve 106 to open to the minimum opening and the bypass port of the second bypass valve 106 to be connected when the water content of the gas in the second ventilation duct 102 is greater than the water content threshold.

[0062] It should be noted that, in actual application scenarios, the first flow regulating valve 103 is a valve for regulating the flow of gas discharged from the supercharger outlet, and the second flow regulating valve 104 is a valve for regulating the flow of gas discharged from the air filter outlet.

[0063] It should be noted that, in actual application scenarios, the first ventilation duct 101 and the second ventilation duct 102 can be simultaneously connected to the air supply port of the crankcase by installing a three-way connector at the air supply port of the crankcase.

[0064] It should be noted that, in actual application scenarios, the water content of the crankcase can be collected by a water content sensor deployed inside the crankcase.

[0065] It should be noted that in actual application scenarios, the load state of the above-mentioned hydrogen internal combustion engine can be characterized based on various types of hydrogen internal combustion engine operating parameters in combination with the actual application scenario. The types of hydrogen internal combustion engine operating parameters include but are not limited to: output torque, output power, fuel consumption rate curve, intake air volume, etc.

[0066] In one possible implementation, when the load state of a hydrogen internal combustion engine is characterized by output torque, the output torque can be acquired by a torque sensor of the hydrogen internal combustion engine. When the output torque reaches a high percentage range of the maximum output torque (e.g., 70%-100% of the maximum output torque, which can be set based on actual parameters of the hydrogen internal combustion engine), the load state of the hydrogen internal combustion engine can be determined to be a high load state.

[0067] In another possible implementation, when the load state of a hydrogen internal combustion engine is characterized by intake air volume, the intake air volume can be collected by an air flow meter of the hydrogen internal combustion engine. When the intake air volume reaches a high percentage range of the maximum intake capacity of the hydrogen internal combustion engine (e.g., 70%-100% of the maximum intake capacity, which can be set according to actual parameters of the hydrogen internal combustion engine), the load state of the hydrogen internal combustion engine can be determined to be a high load state.

[0068] It should be noted that in actual application scenarios, when a hydrogen internal combustion engine is operating at low load, the crankcase hydrogen concentration and water content are low, and the crankcase ventilation requirement is low. However, when a hydrogen internal combustion engine is operating at high load, the crankcase hydrogen concentration and water content are high, and the crankcase ventilation requirement is high. Therefore, under different load conditions, the crankcase ventilation requirement, hydrogen concentration, and water content all vary. Therefore, this application configures a controller to control the first flow control valve 103 and the second flow control valve 104, respectively, to an opening that is compatible with the crankcase water content and the load condition of the hydrogen internal combustion engine. This ensures that the gas flow input into the first ventilation duct 101 and the second ventilation duct 102 simultaneously meets the crankcase ventilation requirement and the need to suppress crankcase oil emulsification.

[0069] It should be noted that in actual application scenarios, since the air intake of the air filter is ambient air, the moisture content of the gas output by the air filter is affected by the ambient humidity and fluctuates. The intake of the supercharger includes not only the high-temperature exhaust gas separated by the hydrogen internal combustion engine's oil-gas separator, but also the ambient gas input by the air filter. This causes the moisture content of the gas output by the supercharger to fluctuate due to the ambient humidity. When the moisture content of the gas input by the supercharger and air filter is high and enters the crankcase through the first and second ventilation ducts, it is easily affected by the crankcase temperature or the ambient temperature, causing the moisture in the gas to condense and precipitate, thereby triggering oil emulsification. Therefore, the present application configures the inlet of the first dryer 107 to be connected to the bypass port of the first bypass valve 105, the outlet of the first dryer 107 to bypass the first ventilation duct 101, the inlet of the second dryer 108 to be connected to the bypass port of the second bypass valve 106, the outlet of the second dryer 108 to bypass the second ventilation duct 102, and configures that when the water content of the gas in the first ventilation duct 101 is greater than the water content threshold, the outlet of the first bypass valve 105 is controlled to open to the minimum opening, the bypass port of the first bypass valve 105 is connected, and / or Or when the water content of the gas in the second ventilation duct 102 is greater than the water content threshold, the air outlet of the second bypass valve 106 is controlled to open to the minimum opening, the bypass port of the second bypass valve 106 is connected, and the first dryer 107 is used to dry the gas in the first ventilation duct 101, and the second dryer 108 is used to dry the gas in the second ventilation duct 102, thereby reducing the water content of the gas entering the crankcase, and then suppressing the occurrence of oil emulsification by suppressing the condensation and precipitation of water, so as to improve the operating reliability of the hydrogen internal combustion engine.

[0070] It should be noted that, since the supercharger and air filter will continuously output gas during the operation of the crankcase ventilation system of the hydrogen internal combustion engine, if the outlet of the first bypass valve 105 and / or the second bypass valve 106 is completely closed, the pressure in the first ventilation duct 101 and / or the second ventilation duct 102 will continue to rise, thereby causing damage to the device. Therefore, the present application controls the outlet of the first bypass valve 105 to open to the minimum opening when the water content of the gas in the first ventilation duct 101 is greater than the water content threshold, and / or controls the outlet of the second bypass valve 106 to open to the minimum opening when the water content of the gas in the second ventilation duct 102 is greater than the water content threshold, thereby ensuring the drying effect and avoiding the risk of device damage caused by the continuous pressure increase.

[0071] It should be noted that, in actual application scenarios, the first dryer 107 and the second dryer 108 may be of various types, including but not limited to adsorption dryers, refrigeration dryers, membrane dryers, etc. This application does not impose any restrictions or elaborate on the specific types of the first dryer 107 and the second dryer 108.

[0072] It should be noted that in actual application scenarios, there may be multiple types of the above-mentioned controllers, including but not limited to: Electronic Control Unit (ECU), Transmission Control Unit (TCU), and Mass Flow Controller (MFC).

[0073] The present application configures a first ventilation duct to connect the supercharger outlet of the hydrogen internal combustion engine with the air supply port of the crankcase, and a second ventilation duct to connect the air filter outlet of the hydrogen internal combustion engine with the air supply port of the crankcase, and configures a controller to respectively control the first flow regulating valve and the second flow regulating valve to open to an opening that is adapted to the water content of the crankcase and the load state of the hydrogen internal combustion engine, so that the gas flow input by the first ventilation duct and the second ventilation duct can simultaneously meet the required ventilation volume of the crankcase and the demand for suppressing the emulsification of the crankcase oil. Furthermore, the inlet of the first dryer is arranged to be connected to the bypass port of the first bypass valve, the outlet of the first dryer bypasses the first ventilation duct, the inlet of the second dryer is arranged to be connected to the bypass port of the second bypass valve, the outlet of the second dryer bypasses the second ventilation duct, and when the water content of the gas in the first ventilation duct is greater than a water content threshold, the outlet of the first bypass valve is controlled to open to a minimum opening, and the bypass port of the first bypass valve is connected; and / or when the water content of the gas in the second ventilation duct is greater than the water content threshold, the outlet of the second bypass valve is controlled to open to a minimum opening, and the bypass port of the second bypass valve is connected, the first dryer is used to dry the gas in the first ventilation duct, and the second dryer is used to dry the gas in the second ventilation duct, thereby reducing the water content of the gas entering the crankcase, and further suppressing the occurrence of oil emulsification by suppressing the condensation and precipitation of water, thereby improving the operating reliability of the hydrogen internal combustion engine. At the same time, by configuring the first bypass valve to open to its minimum outlet when the moisture content of the gas in the first ventilation duct is greater than a moisture content threshold, and / or controlling the second bypass valve to open to its minimum outlet when the moisture content of the gas in the second ventilation duct is greater than a moisture content threshold, the risk of component damage caused by a continuous pressure increase is avoided while ensuring drying effects. This demonstrates that the present application improves the suppression of crankcase oil emulsification and the operational reliability of hydrogen internal combustion engines.

[0074] In one possible implementation, the hydrogen internal combustion engine crankcase ventilation system provided in the first aspect of the present application further includes:

[0075] a third bypass valve and a fourth bypass valve, wherein the third bypass valve is connected in series between the bypass port of the first bypass valve 105 and the inlet of the first dryer 107, and the bypass port of the third bypass valve is communicated with the inlet of the second dryer 108; and a fourth bypass valve is connected in series between the bypass port of the second bypass valve 106 and the inlet of the second dryer 108, and the bypass port of the fourth bypass valve is communicated with the inlet of the first dryer 107;

[0076] The controller 109 is electrically connected to the third bypass valve and the fourth bypass valve, respectively, and is used to control the closure of the air outlet of the third bypass valve and the connection of the bypass port of the third bypass valve when the first dryer 107 fails, or to control the closure of the air outlet of the fourth bypass valve and the connection of the bypass port of the fourth bypass valve when the second dryer 108 fails.

[0077] It should be noted that in actual application scenarios, due to the difference in water content of the gas output by the supercharger and the air filter, and the difference in the opening degree of the first flow control valve 103 and the second flow control valve 104, there is a difference in the water removal rate of the first dryer and the second dryer, and there is a risk of failure of one of the dryers during operation. Therefore, the present application configures a third bypass valve connected in series between the bypass port of the first bypass valve 105 and the inlet of the first dryer 107, the bypass port of the third bypass valve being connected to the inlet of the second dryer 108; and a fourth bypass valve connected in series between the bypass port of the second bypass valve 106 and the inlet of the second dryer 108, the bypass port of the fourth bypass valve being connected to the inlet of the first dryer 107. Furthermore, in the event of failure of the first dryer 107, the outlet of the third bypass valve is controlled to be closed, while the bypass port of the third bypass valve is controlled to be open, thereby directing the gas output from the supercharger to the second dryer 108 for drying. Alternatively, in the event of failure of the second dryer 108, the outlet of the fourth bypass valve is controlled to be closed, while the bypass port of the fourth bypass valve is controlled to be open, thereby directing the gas output from the air filter to the first dryer 107 for drying, thereby reducing the water content of the input crankcase gas and thereby improving the effect of suppressing oil emulsification.

[0078] It should be noted that, in actual application scenarios, whether the first dryer 107 and the second dryer 108 have failed can be monitored by dewpoint instruments deployed in the first dryer 107 and the second dryer 108. When the dewpoint instrument detects that the dew point in the dryer has reached the dewpoint threshold, the dryer can be determined to have failed. Furthermore, to prevent the first dryer 107 and the second dryer 108 from failing simultaneously during operation, the dewpoint thresholds of the two dryers can be configured differently to avoid the risk of both dryers failing simultaneously, thereby ensuring that the process of suppressing oil emulsification is not interrupted.

[0079] It should be noted that in actual application scenarios, the first dryer 107 and the second dryer 108 can be dual-tower adsorption dryers with regeneration capabilities. This allows the failed dryer to be regenerated to restore its drying capacity while the dryer is simultaneously drying the gas in the first ventilation duct 101 and the second ventilation duct. To facilitate understanding of the functions of the third and fourth bypass valves, a possible implementation of this application is described below:

[0080] like Figure 2 FIG. 1 shows a schematic diagram of gas flow when the third bypass valve is in operation. FIG. Figure 2 The connection relationship between the first bypass valve 105, the first dryer 107, the second bypass valve 106, the second dryer 108, the third bypass valve 21 and the fourth bypass valve 22 is as follows: Figure 2 As shown, due to Figure 2 This is a gas flow diagram. Arrows in the diagram represent gas flow and the pipelines through which it flows, and unconnected lines in the diagram represent connected pipelines. If the first dryer 107 fails, the outlet of the third bypass valve 21 closes, cutting off the pipeline between the outlet of the third bypass valve 21 and the inlet of the first dryer 107. The gas output from the first bypass valve 105 flows through the bypass port of the third bypass valve 21 to the inlet of the second dryer 108. Simultaneously, the gas output from the second bypass valve 106 flows through the fourth bypass valve 22 to the inlet of the second dryer 108. The bypass port of the fourth bypass valve 22 closes, cutting off the pipeline between the bypass port of the fourth bypass valve 22 and the inlet of the first dryer 107.

[0081] In one possible implementation, the hydrogen internal combustion engine crankcase ventilation system provided by the first aspect of the present application and any possible implementation of the first aspect further includes:

[0082] a heating device, wherein a first air inlet of the heating device is connected to an air outlet of the first ventilation duct, a second air inlet of the heating device is connected to an air outlet of the second ventilation duct, and an air outlet of the heating device is connected to an air supply port of the crankcase;

[0083] The controller is electrically connected to the heating device and is used to control the heating device to start heating when the temperature of the gas output from the air outlet is lower than the water analysis threshold; it is also used to control the heating device to stop heating when the temperature of the gas output from the air outlet is not lower than the water analysis threshold.

[0084] It should be noted that in actual application scenarios, since the moisture in the gas cannot be completely removed, when the external ambient temperature is too low, the low temperature environment easily causes the moisture in the gas to condense and precipitate. Therefore, the present application configures the first air inlet of the heating device to be connected to the air outlet of the first ventilation duct, the second air inlet of the heating device to be connected to the air outlet of the second ventilation duct, and the air outlet of the heating device to be connected to the air supply port of the crankcase. When the temperature of the gas output from the air outlet is less than the water analysis threshold, the heating device is controlled to start heating, thereby maintaining the temperature of the gas input to the crankcase above the water analysis threshold, thereby reducing the risk of water analysis due to excessively low temperature after the gas enters the crankcase, thereby causing oil emulsification. Energy consumption can be further reduced by controlling the heating device to stop heating when the temperature of the gas output from the air outlet is not less than the water analysis threshold.

[0085] In one possible implementation, the heating device includes:

[0086] a temperature sensor, a fifth bypass valve, an air guide pipe, and a heater, wherein the first end of the air guide pipe is respectively connected to the first air inlet and the second air inlet, and the second end of the air guide pipe is connected to the air outlet of the heating device. The temperature sensor and the fifth bypass valve are sequentially arranged in the air guide pipe along the gas flow direction. The bypass port of the fifth bypass valve is connected to the air inlet of the heater, and the air outlet of the heater bypasses the air guide pipe between the first end and the temperature sensor.

[0087] The controller is electrically connected to the temperature sensor, the fifth bypass valve and the heater respectively, and is used to control the outlet of the fifth bypass valve to open to the minimum opening, control the bypass port of the fifth bypass valve to be conductive, and control the heater to start heating when the gas temperature collected by the temperature sensor is lower than the water analysis threshold; it is also used to control the outlet of the fifth bypass valve to fully open, control the bypass port of the fifth bypass valve to be closed, and control the heater to stop heating when the gas temperature is lower than the water analysis threshold.

[0088] In a possible implementation, the gas flow diagram of the heating device in the starting heating state is as follows: Figure 3As shown. The air entering from the first and second air inlets 31, 32 flows along the air conduit 33 through the temperature sensor 35. When the temperature sensor 35 detects that the gas temperature is below the water separation threshold, the outlet of the fifth bypass valve 36 opens to its minimum opening. A small amount of gas still flows out through the air conduit 33 and the outlet 34 of the heating device to prevent damage to the air conduit and other components. Simultaneously, the bypass port of the fifth bypass valve 36 is opened, allowing the gas to flow through the bypass port of the fifth bypass valve 36 into the heater 37. The heated air flows from the heater 37 through the bypass portion of the air conduit 33 and into the air conduit 33 between the first end and the temperature sensor 35.

[0089] In order to facilitate the understanding of the structure of a hydrogen internal combustion engine crankcase ventilation system provided by the first aspect of the present application, a possible implementation of the present application is specifically described here: Figure 4 The figure shows a schematic diagram of the crankcase ventilation system for a hydrogen internal combustion engine. The supercharger, air filter, oil-gas separator, and the hydrogen internal combustion engine body, consisting of a combustion chamber, crankcase, and oil pan, are all components of existing hydrogen internal combustion engine power systems. The supercharger's air outlet is connected to the combustion chamber's intake duct inlet and the intake end of the first ventilation duct 101, respectively. The supercharger's air inlet is connected to the air filter's air outlet and the oil-gas separator's exhaust outlet, respectively. The oil drain of the oil-gas separator is connected to the oil inlet of the hydrogen internal combustion engine's oil pan. The air filter's air outlet is connected to the intake end of the second ventilation duct 102. The air outlet of the first ventilation duct 101 is connected to the first air inlet of the heating device 401, and the air outlet of the second ventilation duct 102 is connected to the second air inlet of the heating device 401. Along the gas flow direction, the first flow control valve 103 and the first bypass valve 105 are sequentially arranged in the first ventilation duct 101, and the second flow control valve 104 and the second bypass valve 106 are sequentially arranged in the second ventilation duct 102. The bypass port of the first bypass valve 105 communicates with the inlet of the first dryer 107 through the third bypass valve 21 and a connecting pipe. The outlet of the first dryer 107 bypasses the first ventilation duct 101. The bypass port of the second bypass valve 106 communicates with the inlet of the second dryer 108 through the fourth bypass valve 22 and a connecting pipe. The outlet of the second dryer 108 bypasses the second ventilation duct 102. The bypass port of the third bypass valve 21 communicates with the inlet of the second dryer 108, and the bypass port of the fourth bypass valve 22 communicates with the inlet of the first dryer 107. The first flow regulating valve 103 , the first bypass valve 105 , the third bypass valve 21 , the second flow regulating valve 104 , the second bypass valve 106 , the fourth bypass valve 22 and the heating device 401 are all electrically connected to the controller 109 .

[0090] In a possible implementation, the heater may be an electric heater or an exhaust gas heater.

[0091] The second aspect of the present application provides a crankcase ventilation control method, which is applied to a controller in a hydrogen internal combustion engine crankcase ventilation system, wherein the hydrogen internal combustion engine crankcase ventilation system is a hydrogen internal combustion engine crankcase ventilation system provided by the first aspect of the present application and any possible implementation of the first aspect, such as Figure 5 As shown, the crankcase ventilation control method includes:

[0092] S501 : Obtain the load state of the hydrogen internal combustion engine, the water content of the crankcase, the water content of the gas in the first ventilation duct, and the water content of the gas in the second ventilation duct.

[0093] It should be noted that, in actual application scenarios, the load state of the above-mentioned hydrogen internal combustion engine can be collected by any sensor such as a torque sensor, an intake air volume sensor, a speed sensor, etc., and used as a parameter to characterize the load state of the hydrogen internal combustion engine. The moisture content of the above-mentioned crankcase can be collected by a moisture content sensor deployed in the crankcase of the hydrogen internal combustion engine, and is a parameter characterizing the moisture content of the air in the crankcase. The moisture content of the gas in the above-mentioned first ventilation duct can be collected by a moisture content sensor deployed at the air inlet end of the first ventilation duct, and is a parameter characterizing the moisture content of the gas input by the supercharger. The moisture content of the gas in the above-mentioned second ventilation duct can be collected by a moisture content sensor deployed at the air inlet end of the second ventilation duct, and is a parameter characterizing the moisture content of the gas input by the air filter.

[0094] S502 : Control the first flow regulating valve and the second flow regulating valve respectively to open to an opening degree that is compatible with the water content and load state of the crankcase.

[0095] It should be noted that in actual application scenarios, when a hydrogen internal combustion engine is operating at low load, the crankcase hydrogen concentration and water content are low, and the crankcase ventilation requirement is low. However, when a hydrogen internal combustion engine is operating at high load, the crankcase hydrogen concentration and water content are high, and the crankcase ventilation requirement is high. Therefore, under different load conditions, the crankcase ventilation requirement, hydrogen concentration, and water content all vary. Furthermore, due to differences in the air sources of the supercharger and air filter, the water content of the gas output from the two devices also varies. Therefore, the present application separately controls the first and second flow control valves to openings that are compatible with the crankcase water content and load conditions. This, by separately adjusting the supercharger output gas flow rate and the air filter output gas flow rate, adjusts the gas flow rate and water content entering the crankcase. This reduces the water content of the gas in the crankcase while maintaining the output power of the hydrogen internal combustion engine and meeting the required intake volume for crankcase ventilation, thereby suppressing oil emulsification.

[0096] S503. When the moisture content of the gas in the first ventilation duct is greater than the moisture content threshold, control the first bypass valve to guide the gas in the first ventilation duct into the first dryer, and when the moisture content of the gas after drying is not greater than the moisture content threshold, guide the dried gas into the air supply port of the crankcase; and / or when the moisture content of the gas in the second ventilation duct is greater than the moisture content threshold, control the second bypass valve to guide the gas in the second ventilation duct into the second dryer, and when the moisture content of the gas after drying is not greater than the moisture content threshold, guide the dried gas into the air supply port of the crankcase.

[0097] It should be noted that in actual application scenarios, since the moisture content of the gas output by the supercharger and air filter is easily affected by external factors (such as the separation efficiency of the oil-gas separator and the humidity of the external environment), the moisture content of the gas after flow adjustment is still high, thereby increasing the probability of oil emulsification. Therefore, the present application is configured to control the first bypass valve to direct the gas of the first ventilation duct into the first dryer when the water content of the gas in the first ventilation duct is greater than the water content threshold, and to direct the dried gas into the air supply port of the crankcase when the water content of the gas in the dried gas is not greater than the water content threshold, and / or to control the second bypass valve to direct the gas of the second ventilation duct into the second dryer when the water content of the gas in the second ventilation duct is greater than the water content threshold, and to direct the dried gas into the air supply port of the crankcase when the water content of the gas in the second ventilation duct is greater than the water content threshold, and to utilize the first dryer and the second dryer to dry the gas in the corresponding ventilation ducts, thereby reducing the water content of the gas entering the crankcase, thereby improving the effect of suppressing the oil emulsification phenomenon, and improving the operating reliability of the hydrogen internal combustion engine.

[0098] The present application configures and controls the first flow regulating valve and the second flow regulating valve respectively, and opens them to an opening that is adapted to the water content and load state of the crankcase, thereby adjusting the gas flow rate and water content of the gas entering the crankcase by respectively adjusting the supercharger output gas flow and the air filter output gas flow. This does not affect the output power of the hydrogen internal combustion engine, and at the same time, meets the intake volume required for crankcase ventilation, reduces the water content of the gas in the crankcase, and suppresses the emulsification of the engine oil. Furthermore, by controlling the first bypass valve to direct the gas from the first ventilation duct into the first dryer when the moisture content of the gas in the first ventilation duct is greater than a moisture content threshold, and directing the dried gas to the air supply port of the crankcase when the moisture content of the gas in the dried gas is not greater than the moisture content threshold, and / or controlling the second bypass valve to direct the gas from the second ventilation duct into the second dryer when the moisture content of the gas in the second ventilation duct is greater than the moisture content threshold, and directing the dried gas to the air supply port of the crankcase when the moisture content of the gas in the second ventilation duct is greater than the moisture content threshold, utilizing the first dryer and the second dryer to dry the gas in the corresponding ventilation ducts, thereby reducing the moisture content of the gas entering the crankcase, thereby improving the effect of suppressing oil emulsification and enhancing the operating reliability of the hydrogen internal combustion engine. It can be seen that the present application improves the effect of suppressing oil emulsification without affecting the output power of the hydrogen internal combustion engine, thereby improving the operating reliability of the hydrogen internal combustion engine.

[0099] In one possible implementation, the hydrogen internal combustion engine crankcase ventilation system provided by the first aspect of the present application and any possible implementation of the first aspect further includes:

[0100] a third bypass valve and a fourth bypass valve, wherein the third bypass valve is connected in series between the bypass port of the first bypass valve and the inlet of the first dryer, and the bypass port of the third bypass valve is communicated with the inlet of the second dryer; and a fourth bypass valve is connected in series between the bypass port of the second bypass valve and the inlet of the second dryer, and the bypass port of the fourth bypass valve is communicated with the inlet of the first dryer;

[0101] The crankcase ventilation control method provided by the second aspect of the present application and any possible implementation of the second aspect further includes:

[0102] When the moisture removal rate of the first dryer is less than the moisture removal threshold, the third bypass valve is controlled to direct the gas in the first ventilation duct to the second dryer, and when the moisture content of the dried gas is not greater than the moisture content threshold, the gas is directed to the air supply port of the crankcase through the second ventilation duct;

[0103] Alternatively, when the moisture removal rate of the second dryer is less than the moisture removal threshold, the fourth bypass valve is controlled to introduce the gas in the second ventilation duct into the first dryer, and when the gas moisture content of the dried gas is not greater than the moisture content threshold, the gas is introduced into the air supply port of the crankcase through the first ventilation duct.

[0104] It should be noted that in actual application scenarios, the above-mentioned water content threshold can be a gas water content threshold determined through experimental calibration. If the water content of the gas is not greater than the water content threshold, water will not be released even if the gas flows into the crankcase at the highest flow rate.

[0105] In one possible implementation, the hydrogen internal combustion engine crankcase ventilation system provided by the first aspect of the present application and any possible implementation of the first aspect further includes:

[0106] a heating device, wherein a first air inlet of the heating device is connected to an air outlet of the first ventilation duct, a second air inlet of the heating device is connected to an air outlet of the second ventilation duct, and an air outlet of the heating device is connected to an air supply port of the crankcase;

[0107] The crankcase ventilation control method provided by the second aspect of the present application and any possible implementation of the second aspect further includes:

[0108] When the temperature of the mixed gas output from the air outlet is lower than the water separation threshold, the heating device is used to heat the mixed gas, and when the temperature of the mixed gas output from the air outlet is not lower than the water separation threshold, the heating device is controlled to stop heating.

[0109] It should be noted that in actual application scenarios, this application utilizes a heating device to heat the mixed gas when the temperature of the mixed gas output from the air outlet is less than the water separation threshold. This ensures that the mixed gas entering the crankcase, entering the crankcase, and flowing out of the crankcase does not fall below the water separation threshold, thereby avoiding the phenomenon of oil emulsification caused by water separation due to excessively low temperatures. Preferably, there can be multiple water separation thresholds, and the water separation thresholds can be inversely proportional to the ambient temperature. For example, the lower the temperature, the higher the water separation threshold. This improves adaptability to different environments.

[0110] In one possible implementation, the above-mentioned steps of controlling the first flow regulating valve and the second flow regulating valve to open to openings that are adapted to the water content and load state of the crankcase include:

[0111] When the load state represents a high load state, searching for first candidate opening control parameters adapted to the high load state, and searching for a first opening control parameter adapted to the water content of the crankcase among the first candidate opening control parameters; controlling the first flow regulating valve to open to a first opening among the first opening control parameters, and controlling the second flow regulating valve to open to a second opening among the first opening control parameters, wherein the first opening is greater than the second opening;

[0112] When the load state represents a low load state, each second alternative opening control parameter adapted to the low load state is searched, and a second opening control parameter adapted to the water content of the crankcase is searched among each second alternative opening control parameter; the first flow regulating valve is controlled to open to a third opening among the second opening control parameters, and the second flow regulating valve is controlled to open to a fourth opening among the second opening control parameters, the third opening being smaller than the fourth opening.

[0113] It should be noted that in actual application scenarios, the above-mentioned high-load state and low-load state can be set based on the specific parameters of the hydrogen internal combustion engine. For example, when the output torque of the hydrogen internal combustion engine reaches a high-proportion range of the maximum output torque (such as 70%-100% of the maximum output torque, which can be set according to the actual parameters of the hydrogen internal combustion engine), it can be determined that the load state of the hydrogen internal combustion engine is a high-load state. If the output torque is not in the above-mentioned high-proportion range, it can be determined that the load state of the hydrogen internal combustion engine is a low-load state.

[0114] It should be noted that under high load conditions, the crankcase ventilation requirement increases due to the high hydrogen concentration and water content in the crankcase. This requires the gas used for crankcase ventilation to meet the characteristics of high gas flow rate and low water content. The gas output from the supercharger has the characteristics of high flow rate, high temperature, and low water content, while the gas output from the air filter has the characteristics of low flow rate, low temperature, and unstable water content. Therefore, the present application controls the first flow control valve to open to a first opening within the first opening control parameter and controls the second flow control valve to open to a second opening within the first opening control parameter, with the first opening being greater than the second opening, by configuring the gas output from the supercharger to heat, dilute, and reduce the water content of the mixed gas. This ensures that the gas input to the crankcase meets the characteristics of high flow rate, high temperature, and low water content, thereby suppressing water separation and causing oil emulsification. It should be noted that under low load conditions, due to the low hydrogen concentration and water content of the crankcase, the gas flow rate output by the supercharger is reduced. This results in the gas used for crankcase ventilation needing to meet the characteristics of high gas flow. The characteristics of the gas output by the air filter are high flow and sufficient source. Therefore, the present application controls the first flow regulating valve to open to the third opening in the second opening control parameter, and controls the second flow regulating valve to open to the fourth opening in the second opening control parameter when the load state represents a low load state. The third opening is smaller than the fourth opening, thereby utilizing the gas output by the air filter to supplement the intake volume required for the crankcase, thereby ensuring the ventilation requirements of the crankcase under low load conditions and improving the operational reliability of the hydrogen internal combustion engine.

[0115] In one possible implementation, the heating device provided in the first aspect of the present application and any possible implementation of the first aspect includes:

[0116] a temperature sensor, a fifth bypass valve, an air guide pipe, and a heater, wherein the first end of the air guide pipe is respectively connected to the first air inlet and the second air inlet, and the second end of the air guide pipe is connected to the air outlet of the heating device. The temperature sensor and the fifth bypass valve are sequentially arranged in the air guide pipe along the gas flow direction. The bypass port of the fifth bypass valve is connected to the air inlet of the heater, and the air outlet of the heater bypasses the air guide pipe between the first end and the temperature sensor.

[0117] The above-mentioned method of heating the mixed gas by using the heating device when the temperature of the mixed gas output from the air outlet is lower than the water separation threshold, and controlling the heating device to stop heating when the temperature of the mixed gas output from the air outlet is not lower than the water separation threshold, includes:

[0118] When the temperature of the mixed gas is lower than the water analysis threshold, the fifth bypass valve is controlled to direct the mixed gas in the gas guide line into the heater, and when the temperature of the heated mixed gas is not lower than the water analysis threshold, the fifth bypass valve is controlled to direct the heated mixed gas into the air supply port of the crankcase.

[0119] To facilitate understanding of the crankcase ventilation control method provided by the second aspect of the present application and any possible implementation of the second aspect, a possible implementation of the present application is specifically described herein:

[0120] like Figure 6 The figure shows a flow chart of a crankcase ventilation control method. The specific operation steps are as follows:

[0121] Step S601: Obtain the load state of the hydrogen internal combustion engine and the water content of the crankcase, and trigger step S602.

[0122] Step S602: Determine whether the load state is a high load state. If yes, step S603 is triggered; if no, step S604 is triggered.

[0123] Step S603: Find a first opening control parameter that matches the water content of the crankcase, control the first flow regulating valve to open to the first opening within the first opening control parameter, and control the second flow regulating valve to open to the second opening within the first opening control parameter. This triggers step S605.

[0124] Step S604: Find a second opening control parameter that matches the water content of the crankcase, control the first flow control valve to open to the third opening within the second opening control parameter, and control the second flow control valve to open to the fourth opening within the second opening control parameter. This triggers step S605.

[0125] Step S605: Acquire the moisture content of the gas in the first ventilation duct and the moisture content of the gas in the second ventilation duct, and trigger step S606.

[0126] Step S606: Determine whether the moisture content of the gas in the target ventilation duct is not greater than the moisture content threshold. If so, step S607 is triggered; if not, step S609 is triggered.

[0127] In a possible implementation, the target ventilation duct in step S606 is the first ventilation duct and the second ventilation duct.

[0128] Step S607: Determine whether the temperature of the mixed gas after the gas in the first ventilation duct and the gas in the second ventilation duct is mixed is not less than the water separation threshold. If so, step S608 is triggered; if not, step S612 is triggered.

[0129] Step S608: introducing the mixed gas into the crankcase.

[0130] Step S609: Determine whether the target dryer connected to the bypass port of the target bypass valve in the target ventilation duct is inoperative. If so, step S610 is triggered. If not, step S611 is triggered.

[0131] In a possible implementation, in step S609 , when the target ventilation duct is the first ventilation duct, the target bypass valve is the first bypass valve. When the target ventilation duct is the second ventilation duct, the target bypass valve is the second bypass valve.

[0132] In step S610, the gas output from the bypass port of the target bypass valve is introduced into another backup dryer other than the target dryer.

[0133] In a possible implementation, in step S610, when the target dryer is the first dryer, the backup dryer is the second dryer. When the target dryer is the second dryer, the backup dryer is the first dryer.

[0134] In step S611, the gas outlet of the target bypass valve is controlled to open to the minimum opening, and the gas outputted from the bypass port of the target bypass valve is introduced into the target dryer, and step S606 is triggered.

[0135] Step S612: Start the heating device to heat the mixed gas, and trigger step S607.

[0136] A third aspect of the present application provides a controller, comprising at least one processor and a memory connected to the processor, wherein:

[0137] Memory is used to store computer programs;

[0138] The processor is used to execute the computer program so that the controller can implement the crankcase ventilation control method provided in the second aspect of the present application and any possible implementation of the second aspect.

[0139] The structural diagram of the controller provided in the third aspect of this application is as follows Figure 7 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 7 The controller shown is merely an example and should not limit the functions and scope of use of the embodiments of the present application.

[0140] like Figure 7 As shown, the controller may include a processing device (e.g., a central processing unit, a graphics processing unit, etc.) 701, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 702 or a program loaded from a storage device 708 into a random access memory (RAM) 703. When the controller is powered on, the RAM 703 also stores various programs and data required for the operation of the controller. The processing device 701, the ROM 702, and the RAM 703 are connected to each other via a bus 704. An input / output (I / O) interface 705 is also connected to the bus 704.

[0141] Typically, the following devices may be connected to the I / O interface 705: an input device 706 including, for example, a touch screen, a touchpad, a keyboard, a mouse, a camera, a microphone, a torque sensor, a dew point meter, etc.; an output device 707 including, for example, a liquid crystal display (LCD), a speaker, a flow control valve, etc.; a storage device 708 including, for example, a memory card, a hard disk, etc.; and a communication device 709. The communication device 709 may allow the controller to communicate with other devices wirelessly or by wire to exchange data. Although Figure 7 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.

[0142] The present application also provides an embodiment of a computer program product comprising computer-readable instructions, which, when executed on a controller, cause the controller to implement the crankcase ventilation control method provided in the second aspect of the present application and any possible implementation of the second aspect. The present application also provides an embodiment of a computer-readable storage medium, which carries one or more computer programs, which, when executed by the controller, cause the controller to implement the crankcase ventilation control method provided in the second aspect of the present application and any possible implementation of the second aspect. 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 shown as units may or may not be physical units, i.e., they may be located in one place or 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 by the present application, the connection relationship between modules indicates that they have a communication connection, which can be specifically implemented as one or more communication buses or signal lines.

[0143] 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.

[0144] 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.

[0145] 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 hydrogen internal combustion engine crankcase ventilation system, characterized in that: include: A first ventilation duct, a second ventilation duct, a first flow regulating valve, a second flow regulating valve, a first bypass valve, a second bypass valve, a first dryer, a second dryer, and a controller; The first ventilation duct is connected to the air outlet of the supercharger of the hydrogen internal combustion engine and the air supply port of the crankcase, and the second ventilation duct is connected to the air outlet of the air filter of the hydrogen internal combustion engine and the air supply port of the crankcase; The first flow regulating valve and the first bypass valve are sequentially arranged in the first ventilation duct along the air flow direction, and the second flow regulating valve and the second bypass valve are sequentially arranged in the second ventilation duct along the air flow direction; The inlet of the first dryer is communicated with the bypass port of the first bypass valve, the outlet of the first dryer bypasses the first ventilation duct, the inlet of the second dryer is communicated with the bypass port of the second bypass valve, and the outlet of the second dryer bypasses the second ventilation duct; The controller is electrically connected to the first flow regulating valve, the second flow regulating valve, the first bypass valve and the second bypass valve, respectively, and is used to control the first flow regulating valve and the second flow regulating valve, respectively, to open to an opening that is adapted to the water content of the crankcase and the load state of the hydrogen internal combustion engine; and is also used to control the air outlet of the first bypass valve to open to a minimum opening and the bypass port of the first bypass valve to be connected when the water content of the gas in the first ventilation duct is greater than a water content threshold, and / or control the air outlet of the second bypass valve to open to a minimum opening and the bypass port of the second bypass valve to be connected when the water content of the gas in the second ventilation duct is greater than the water content threshold.

2. The crankcase ventilation system of a hydrogen internal combustion engine according to claim 1, characterized in that: The hydrogen internal combustion engine crankcase ventilation system further comprises: a third bypass valve and a fourth bypass valve, wherein the third bypass valve is connected in series between the bypass port of the first bypass valve and the inlet of the first dryer, and the bypass port of the third bypass valve is communicated with the inlet of the second dryer; and the fourth bypass valve is connected in series between the bypass port of the second bypass valve and the inlet of the second dryer, and the bypass port of the fourth bypass valve is communicated with the inlet of the first dryer; The controller is electrically connected to the third bypass valve and the fourth bypass valve, respectively, and is used to control the air outlet of the third bypass valve to be closed and the bypass port of the third bypass valve to be connected when the first dryer fails, or to control the air outlet of the fourth bypass valve to be closed and the bypass port of the fourth bypass valve to be connected when the second dryer fails.

3. The crankcase ventilation system of a hydrogen internal combustion engine according to any one of claims 1 or 2, characterized in that: The hydrogen internal combustion engine crankcase ventilation system further comprises: a heating device, wherein a first air inlet of the heating device is in communication with an air outlet of the first ventilation duct, a second air inlet of the heating device is in communication with an air outlet of the second ventilation duct, and an air outlet of the heating device is in communication with an air supply port of the crankcase; The controller is electrically connected to the heating device and is used to control the heating device to start heating when the temperature of the gas output from the air outlet is lower than the water analysis threshold; and is also used to control the heating device to stop heating when the temperature of the gas output from the air outlet is not lower than the water analysis threshold.

4. The crankcase ventilation system of a hydrogen internal combustion engine according to claim 3, characterized in that: The heating device comprises: a temperature sensor, a fifth bypass valve, an air guide pipe, and a heater, wherein a first end of the air guide pipe is respectively connected to the first air inlet and the second air inlet, and a second end of the air guide pipe is connected to the air outlet of the heating device. The temperature sensor and the fifth bypass valve are sequentially arranged in the air guide pipe along the gas flow direction, a bypass port of the fifth bypass valve is connected to the air inlet of the heater, and an air outlet of the heater bypasses the air guide pipe between the first end and the temperature sensor. The controller is electrically connected to the temperature sensor, the fifth bypass valve and the heater, respectively, and is used to control the gas outlet of the fifth bypass valve to open to the minimum opening, control the bypass port of the fifth bypass valve to be conductive, and control the heater to start heating when the gas temperature collected by the temperature sensor is lower than the water analysis threshold; and is also used to control the gas outlet of the fifth bypass valve to fully open, control the bypass port of the fifth bypass valve to be closed, and control the heater to stop heating when the gas temperature is lower than the water analysis threshold.

5. A crankcase ventilation control method, characterized in that: A controller applied to a hydrogen internal combustion engine crankcase ventilation system, wherein the hydrogen internal combustion engine crankcase ventilation system is the hydrogen internal combustion engine crankcase ventilation system according to any one of claims 1 to 4, and the crankcase ventilation control method comprises: obtaining a load state of the hydrogen internal combustion engine, a water content of the crankcase, a water content of gas in the first ventilation duct, and a water content of gas in the second ventilation duct; respectively controlling the first flow regulating valve and the second flow regulating valve to open to an opening degree adapted to the water content of the crankcase and the load state; When the moisture content of the gas in the first ventilation duct is greater than a moisture content threshold, the first bypass valve is controlled to direct the gas in the first ventilation duct into the first dryer, and when the moisture content of the gas after drying is not greater than the moisture content threshold, the dried gas is directed into the air supply port of the crankcase; and / or when the moisture content of the gas in the second ventilation duct is greater than the moisture content threshold, the second bypass valve is controlled to direct the gas in the second ventilation duct into the second dryer, and when the moisture content of the gas after drying is not greater than the moisture content threshold, the dried gas is directed into the air supply port of the crankcase.

6. The crankcase ventilation control method according to claim 5, characterized in that: The hydrogen internal combustion engine crankcase ventilation system further comprises: a third bypass valve and a fourth bypass valve, wherein the third bypass valve is connected in series between the bypass port of the first bypass valve and the inlet of the first dryer, and the bypass port of the third bypass valve is communicated with the inlet of the second dryer; and the fourth bypass valve is connected in series between the bypass port of the second bypass valve and the inlet of the second dryer, and the bypass port of the fourth bypass valve is communicated with the inlet of the first dryer; The crankcase ventilation control method further includes: When the moisture removal rate of the first dryer is less than a moisture removal threshold, the third bypass valve is controlled to direct the gas in the first ventilation duct into the second dryer, and when the moisture content of the dried gas is not greater than the moisture content threshold, the gas is directed through the second ventilation duct to the air supply port of the crankcase; Alternatively, when the moisture removal rate of the second dryer is less than the moisture removal threshold, the fourth bypass valve is controlled to introduce the gas in the second ventilation duct into the first dryer, and when the gas moisture content of the dried gas is not greater than the moisture content threshold, the gas is introduced into the air supply port of the crankcase through the first ventilation duct.

7. The crankcase ventilation control method according to any one of claims 5 or 6, characterized in that: The hydrogen internal combustion engine crankcase ventilation system further comprises: a heating device, wherein a first air inlet of the heating device is in communication with an air outlet of the first ventilation duct, a second air inlet of the heating device is in communication with an air outlet of the second ventilation duct, and an air outlet of the heating device is in communication with an air supply port of the crankcase; The crankcase ventilation control method further includes: When the temperature of the mixed gas output from the air outlet is lower than the water separation threshold, the heating device is used to heat the mixed gas, and when the temperature of the mixed gas output from the air outlet is not lower than the water separation threshold, the heating device is controlled to stop heating.

8. The crankcase ventilation control method according to claim 5, characterized in that: The step of controlling the first flow regulating valve and the second flow regulating valve to open to openings that are compatible with the water content of the crankcase and the load state includes: When the load state represents a high load state, searching for first candidate opening control parameters adapted to the high load state, and searching for a first opening control parameter adapted to the water content of the crankcase among the first candidate opening control parameters; controlling the first flow regulating valve to open to a first opening among the first opening control parameters, and controlling the second flow regulating valve to open to a second opening among the first opening control parameters, wherein the first opening is greater than the second opening; When the load state represents a low load state, each second alternative opening control parameter adapted to the low load state is searched, and a second opening control parameter adapted to the water content of the crankcase is searched among each second alternative opening control parameter; the first flow regulating valve is controlled to open to a third opening among the second opening control parameters, and the second flow regulating valve is controlled to open to a fourth opening among the second opening control parameters, wherein the third opening is smaller than the fourth opening.

9. The crankcase ventilation control method according to claim 7, characterized in that: The heating device comprises: a temperature sensor, a fifth bypass valve, an air guide pipe, and a heater, wherein a first end of the air guide pipe is respectively connected to the first air inlet and the second air inlet, and a second end of the air guide pipe is connected to the air outlet of the heating device. The temperature sensor and the fifth bypass valve are sequentially arranged in the air guide pipe along the gas flow direction, a bypass port of the fifth bypass valve is connected to the air inlet of the heater, and an air outlet of the heater bypasses the air guide pipe between the first end and the temperature sensor. When the temperature of the mixed gas output from the air outlet is lower than a water separation threshold, the heating device is used to heat the mixed gas, and when the temperature of the mixed gas output from the air outlet is not lower than the water separation threshold, the heating device is controlled to stop heating, including: When the temperature of the mixed gas is lower than the water separation threshold, the fifth bypass valve is controlled to introduce the mixed gas in the gas guide line into the heater; and when the temperature of the heated mixed gas is not lower than the water separation threshold, the fifth bypass valve is controlled to introduce the heated mixed gas into the air supply port of the crankcase.

10. A controller, characterized in that: comprising 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 ventilation control method according to any one of claims 5 to 9.

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