A crankcase air charge system and a crankcase air charge control method

Abstract

The application discloses a crankcase air supplement system and a crankcase air supplement control method, and relates to the field of hydrogen internal combustion engines.The application comprises the following steps: in the case that the water content of the crankcase is not less than a water analysis threshold value, and the temperature of the mixture discharged from the crankcase is not less than a high-temperature limit value, a condensing oil-gas separator is controlled to operate in a full-power state; and in the case that the temperature of the mixture is not in a water condensation temperature interval, a temperature controller is controlled to control the temperature of the mixture in the gas guide pipeline, so that the temperature of the mixture is in the water condensation temperature interval.The application controls the condensing oil-gas separator to operate in the full-power state to accelerate the outflow rate of the gas in the crankcase, so that the water in the mixed gas is prevented from being precipitated in the crankcase, and the temperature controller is configured to control the temperature of the mixture, so that the water content of the gas entering the supercharger is reduced, and the inhibiting effect on the oil emulsification phenomenon is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydrogen internal combustion engine, and particularly relates to a crankcase air supplementing system and a crankcase air supplementing control method. BACKGROUND

[0002] The hydrogen internal combustion engine is an internal combustion engine taking hydrogen fuel (such as hydrogen or hydrogen-containing fuel) as fuel. Since the water content in the exhaust gas after the combustion of the hydrogen fuel is high, when the exhaust gas flows through the crankcase and the oil-gas separator, the water in the exhaust gas is easy to be precipitated under the influence of temperature and to contact with the oil, so that the oil appears emulsification phenomenon, which reduces the lubricating effect of the oil and leads to the reduction of the operation reliability of the hydrogen internal combustion engine. SUMMARY

[0003] In view of the above problems, the present application provides a crankcase air supplementing system and a crankcase air supplementing control method to realize the inhibition of the oil emulsification phenomenon and to improve the operation reliability of the hydrogen internal combustion engine. The specific scheme is as follows:

[0004] The first aspect of the present application provides a crankcase air supplementing system applied to a hydrogen internal combustion engine, and the crankcase air supplementing system comprises:

[0005] a gas guide pipeline, a condensing oil-gas separator, a temperature controller and a controller,

[0006] The gas outlet of the crankcase of the hydrogen internal combustion engine is communicated with the inlet of the condensing oil-gas separator through the gas guide pipeline, the temperature controller is arranged in the gas guide pipeline, and the exhaust outlet of the condensing oil-gas separator is communicated with the air inlet of the supercharger of the hydrogen internal combustion engine.

[0007] The controller is electrically connected with the temperature controller and the condensing oil-gas separator respectively, is used for controlling the condensing oil-gas separator to operate in a full-power state when the water content of the crankcase is not less than a water precipitation threshold value and the temperature of the mixture discharged from the crankcase is not less than a high-temperature limit value, and is used for controlling the temperature controller to control the temperature of the mixture in the gas guide pipeline so that the temperature of the mixture is in a water condensation temperature range when the temperature of the mixture is not in the water condensation temperature range.

[0008] In a possible implementation, the crankcase air supplementing system further comprises:

[0009] a first flow regulating valve, a second flow regulating valve, a first air supplementing pipeline and a second air supplementing pipeline,

[0010] The first end of the first air supplement pipeline is in communication with the outlet of the supercharger, and the second end of the first air supplement pipeline is in communication with the air inlet of the crankcase. The first end of the second air supplement pipeline is in communication with the outlet of the air filter of the hydrogen internal combustion engine, and the second end of the second air supplement pipeline is in communication with the air inlet of the crankcase.

[0011] The first flow regulating valve is arranged in the first air supplement pipeline, and the second flow regulating valve is arranged in the second air supplement pipeline.

[0012] The controller is electrically connected with the first flow regulating valve and the second flow regulating valve respectively, and is configured to control the first flow regulating valve and the second flow regulating valve to open to an opening degree that is adapted to the ambient humidity and the rotating speed of the hydrogen internal combustion engine respectively, wherein the opening degree of the first flow regulating valve that is adapted to the ambient humidity and the rotating speed of the hydrogen internal combustion engine is different from the opening degree of the second flow regulating valve that is adapted to the ambient humidity and the rotating speed of the hydrogen internal combustion engine.

[0013] In a possible implementation, the controller is further configured to control the condensing oil-gas separator to operate in a minimum power state when the water content is less than the water analysis threshold and the mixture temperature is less than a low temperature limit.

[0014] Or, the controller is further configured to control the condensing oil-gas separator to operate in a first power state when the water content is less than the water analysis threshold and the mixture temperature is less than a high temperature limit.

[0015] Or, the controller is further configured to control the condensing oil-gas separator to operate in a second power state when the water content is less than the water analysis threshold and the mixture temperature is not less than the high temperature limit.

[0016] Or, the controller is further configured to control the condensing oil-gas separator to operate in a third power state when the water content is not less than the water analysis threshold and the mixture temperature is less than a low temperature limit.

[0017] Or, the controller is further configured to control the condensing oil-gas separator to operate in a fourth power state when the water content is not less than the water analysis threshold and the mixture temperature is not less than the low temperature limit and less than a high temperature limit, wherein the operating power of the fourth power state is greater than the operating power of the third power state, the operating power of the third power state is greater than the operating power of the second power state, the operating power of the second power state is greater than the operating power of the first power state, and the operating power of the first power state is greater than the operating power of the minimum power state.

[0018] In a possible implementation, the crankcase air supplement system further comprises:

[0019] a temperature sensor, a four-way valve and a heating device, a first end of the four-way valve is communicated with a second end of the first air supplement pipeline, a second end of the four-way valve is communicated with a second end of the second air supplement pipeline, a third end of the four-way valve is communicated with an air inlet of the crankcase, a fourth end of the four-way valve is communicated with an air inlet of the heating device, an air outlet of the heating device is communicated with the air inlet of the crankcase, the temperature sensor is arranged in the four-way valve;

[0020] the controller is electrically connected with the temperature sensor, the four-way valve and the heating device respectively, for controlling the first end, the second end and the third end of the four-way valve to be conducted, and the fourth end of the four-way valve to be closed, so as to guide the intake air of the first air supplement pipeline and the second air supplement pipeline to the air inlet of the crankcase, when the temperature of the mixed gas collected by the temperature sensor is not less than the water analysis temperature threshold; and for controlling the first end, the second end and the fourth end of the four-way valve to be conducted, and the third end of the four-way valve to be closed, so as to guide the intake air of the first air supplement pipeline and the second air supplement pipeline to the heating device, and controlling the heating device to heat the intake air to not less than the water analysis temperature threshold, and then guiding the heated intake air to the air inlet of the crankcase, when the temperature of the mixed gas is less than the water analysis temperature threshold.

[0021] In a possible implementation, the crankcase air supplement system further comprises:

[0022] a first oil guide pipeline, an oil water content sensor, a bypass valve, a heating container, a booster pump and a second oil guide pipeline, the first oil guide pipeline communicates an oil outlet of the condensing oil-gas separator and an oil inlet of an oil sump of the crankcase, the oil water content sensor and the bypass valve are arranged in the first oil guide pipeline in sequence along the oil flow direction, a bypass port of the bypass valve is communicated with an oil inlet of the heating container, an oil outlet of the heating container bypasses the first oil guide pipeline through the second oil guide pipeline, and the bypass position is located upstream of the oil water content sensor, and the booster pump is arranged in the second oil guide pipeline;

[0023] The controller is also electrically connected with the oil water content sensor, the bypass valve, the heating container and the booster pump respectively, and is configured to control the bypass port of the bypass valve to be closed to guide the oil discharged from the oil outlet into the oil pan of the crankcase when the oil water content collected by the oil water content sensor is less than the oil water content threshold; and is further configured to control the outlet of the bypass valve to be closed and the bypass port to be opened to guide the oil discharged from the oil outlet into the heating container when the oil water content is not less than the oil water content threshold, control the heating container to heat the guided oil to evaporate the water in the oil, and control the booster pump to be started to guide the oil with evaporated water into the first oil guiding pipeline.

[0024] The second aspect of the present application provides a crankcase air charging control method, which is applied to a controller of a crankcase air charging system, and the crankcase air charging system is provided in the first aspect and any possible implementation of the first aspect. The crankcase air charging control method comprises the following steps.

[0025] When the water content of the crankcase is not less than the water analysis threshold and the temperature of the mixture discharged from the crankcase is not less than the high temperature limit, the condenser oil-gas separator is controlled to operate in a full power state.

[0026] When the temperature of the mixture is not in the water condensation temperature range, the temperature controller is controlled to control the temperature of the mixture in the gas guiding pipeline, so that the temperature of the mixture is in the water condensation temperature range.

[0027] In one possible implementation, the crankcase air charging system further comprises:

[0028] a first flow regulating valve, a second flow regulating valve, a first air charging pipeline and a second air charging pipeline,

[0029] The first end of the first air charging pipeline is in communication with the outlet of the supercharger of the hydrogen internal combustion engine, the second end of the first air charging pipeline is in communication with the air inlet of the crankcase, the first end of the second air charging pipeline is in communication with the outlet of the air filter of the hydrogen internal combustion engine, and the second end of the second air charging pipeline is in communication with the air inlet of the crankcase.

[0030] The first flow regulating valve is arranged in the first air charging pipeline, and the second flow regulating valve is arranged in the second air charging pipeline.

[0031] The crankcase air charging control method further comprises:

[0032] respectively controlling the first flow regulating valve and the second flow regulating valve to open to an opening degree adapted to both the ambient humidity and the rotation speed of the hydrogen internal combustion engine, wherein the opening degree of the first flow regulating valve adapted to both the ambient humidity and the rotation speed of the hydrogen internal combustion engine is different from the opening degree of the second flow regulating valve adapted to both the ambient humidity and the rotation speed of the hydrogen internal combustion engine.

[0033] In a possible implementation, the crankcase air charging control method further includes:

[0034] controlling the condensing oil-gas separator to operate in a minimum power state when the water content is less than the water analysis threshold and the mixture temperature is less than a low temperature limit;

[0035] or, controlling the condensing oil-gas separator to operate in a first power state when the water content is less than the water analysis threshold and the mixture temperature is not less than the low temperature limit and less than a high temperature limit;

[0036] or, controlling the condensing oil-gas separator to operate in a second power state when the water content is less than the water analysis threshold and the mixture temperature is not less than the high temperature limit;

[0037] or, controlling the condensing oil-gas separator to operate in a third power state when the water content is not less than the water analysis threshold and the mixture temperature is less than a low temperature limit;

[0038] or, controlling the condensing oil-gas separator to operate in a fourth power state when the water content is not less than the water analysis threshold and the mixture temperature is not less than the low temperature limit and less than a high temperature limit, wherein the operating power of the fourth power state is greater than the operating power of the third power state, the operating power of the third power state is greater than the operating power of the second power state, the operating power of the second power state is greater than the operating power of the first power state, and the operating power of the first power state is greater than the operating power of the minimum power state.

[0039] In a possible implementation, the crankcase air charging system further includes:

[0040] a temperature sensor, a four-way valve and a heating device, a first end of the four-way valve is in communication with a second end of the first air charging pipeline, a second end of the four-way valve is in communication with a second end of the second air charging pipeline, a third end of the four-way valve is in communication with an air inlet of the crankcase, a fourth end of the four-way valve is in communication with an air inlet of the heating device, an air outlet of the heating device is in communication with the air inlet of the crankcase, and the temperature sensor is arranged inside the four-way valve.

[0041] The crankcase air charging control method further comprises:

[0042] In a case where the mixed gas temperature collected by the temperature sensor is not less than a water analysis-out temperature threshold value, the first end, the second end and the third end of the four-way valve are controlled to be conducted, and the fourth end of the four-way valve is controlled to be closed, so as to guide the intake air of the first air charging pipeline and the second air charging pipeline into the intake port of the crankcase of the hydrogen internal combustion engine;

[0043] In a case where the mixed gas temperature is less than the water analysis-out temperature threshold value, the first end, the second end and the fourth end of the four-way valve are controlled to be conducted, and the third end of the four-way valve is controlled to be closed, so as to guide the intake air of the first air charging pipeline and the second air charging pipeline into the heating device, and control the heating device to heat the intake air to not less than the water analysis-out temperature threshold value, and then guide the heated intake air into the intake port of the crankcase.

[0044] In a possible implementation, the crankcase air charging system further comprises:

[0045] The first oil guiding pipeline, the oil water content sensor, the bypass valve, the heating container, the booster pump and the second oil guiding pipeline, the first oil guiding pipeline is communicated with the oil outlet of the condensing oil-gas separator and the oil inlet of the oil pan of the crankcase, the oil water content sensor and the bypass valve are sequentially arranged in the first oil guiding pipeline along the oil flow direction, the bypass port of the bypass valve is communicated with the oil inlet of the heating container, the oil outlet of the heating container is bypassed to the first oil guiding pipeline through the second oil guiding pipeline, and the bypass position is located upstream of the oil water content sensor, and the booster pump is arranged in the second oil guiding pipeline;

[0046] The crankcase air charging control method further comprises:

[0047] In a case where the oil water content collected by the oil water content sensor is less than an oil water content threshold value, the bypass port of the bypass valve is controlled to be closed, so as to guide the oil discharged from the oil outlet of the condensing oil-gas separator into the oil pan of the crankcase;

[0048] In a case where the oil water content is not less than the oil water content threshold value, the outlet of the bypass valve is controlled to be closed, the bypass port is controlled to be opened, so as to guide the oil discharged from the oil outlet into the heating container, control the heating container to heat the guided oil, evaporate the water in the oil, and control the booster pump to be started, so as to guide the oil with evaporated water into the first oil guiding pipeline.

[0049] By utilizing the above-mentioned technical solution, the present application provides a crankcase air replenishment system and crankcase air replenishment control method. By controlling the condensing oil-gas separator to operate at full power when the crankcase water content is no less than a water separation threshold and the temperature of the mixture discharged from the crankcase is no less than a high temperature limit, the system increases the outflow rate of the crankcase gas, thereby improving the suppression of hydrogen deflagration and oil emulsification. Furthermore, by disposing a thermostat in the air duct connecting the crankcase gas outlet and the inlet of the condensing oil-gas separator and controlling the temperature of the mixture in the air duct to maintain it within the water condensation temperature range when the mixture temperature is not within the water condensation temperature range, the system improves the separation efficiency of the condensing oil-gas separator for water vapor in the mixture, reduces the water content in the exhaust gas and the engine oil, and thereby reduces the water content of the gas input from the supercharger to the crankcase and the water content of the engine oil in the crankcase sump, thereby improving the suppression of engine oil emulsification. It can be seen that the present application improves the inhibitory effect on hydrogen deflagration and oil emulsification, and improves the operating reliability of the hydrogen internal combustion engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] 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.

[0051] Figure 1 A schematic structural diagram of a crankcase air replenishment system provided in this application;

[0052] Figure 2 A schematic structural diagram of a crankcase air replenishment system provided in this application;

[0053] Figure 3 A schematic diagram of the structure of a controller provided in this application. DETAILED DESCRIPTION

[0054] 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.

[0055] 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.

[0056] The terms "first", "second", and the like in the description and in the claims of the present application and in the above figures are used to distinguish similar objects and are not necessarily used to describe a specific sequential or chronological order. It should be understood that terms so used are interchangeable under appropriate circumstances and are merely employed in the descriptions of embodiments of the present application for purposes of the description. Additionally, the terms "comprise", "have" and "include" and variations thereof, as well as the terms "contain", "maintain", "hold", and "carry", are intended to cover a process, method, system, product, or apparatus that comprises, includes, carries, or holds those elements listed but not excluding additional elements. The terms "a", "an" and the like are defined with the meaning that they include one or more of what is specifically recited.

[0057] It should be noted that, compared with the prior art, the present application improves the inhibition effect on the oil emulsification phenomenon and the operation reliability of the hydrogen internal combustion engine. Specifically, there are several reasons for the oil emulsification phenomenon. Firstly, the existing method of using a supercharger as a crankcase air supply source needs to prioritize the operation of the hydrogen internal combustion engine when the load of the hydrogen internal combustion engine is high, which reduces the amount of air entering the crankcase. The reduction in air volume will reduce the flow rate of the gas, which will reduce the outflow rate of the gas in the crankcase, and thus increase the water content in the crankcase, causing water to be analyzed out and oil emulsification. Secondly, the existing centrifugal oil-gas separator mainly separates oil and gas based on the density difference between oil vapor and water vapor using centrifugal force, but this also results in a relatively high water content in the exhaust gas. The exhaust gas discharged by the oil-gas separator is then introduced into the supercharger, which increases the water content of the gas output by the supercharger, and thus causes water to be analyzed out and oil emulsification in the crankcase. The present scheme is configured to communicate the gas outlet of the crankcase with the inlet of the condensing oil-gas separator through a gas guide pipeline, and to control the condensing oil-gas separator to operate at full power when the water content in the crankcase is not less than a water analysis threshold and the temperature of the mixture discharged from the crankcase is not less than a high temperature limit. This improves the outflow rate of the gas in the crankcase when the hydrogen internal combustion engine is under high load, thereby preventing the water content in the crankcase from continuously increasing and inhibiting the oil emulsification phenomenon. Furthermore, by deploying a temperature controller in the gas guide pipeline and controlling the temperature controller to control the temperature of the mixture in the gas guide pipeline when the temperature of the mixture is not in the water condensation temperature range, the temperature of the mixture is controlled to be in the water condensation temperature range, thereby improving the efficiency of the condensing oil-gas separator in condensing and separating water from the mixture, reducing the water content of the gas entering the supercharger, and thus reducing the water content of the gas entering the crankcase. It can be seen that the present application improves the inhibition effect on the oil emulsification phenomenon and the operation reliability of the hydrogen internal combustion engine.

[0058] The first aspect of the present application provides a crankcase air supply system applied to a hydrogen internal combustion engine, as shown in the figure, the crankcase air supply system comprises: Figure 1 The first aspect of the present application provides a crankcase air supply system applied to a hydrogen internal combustion engine, as shown in the figure, the crankcase air supply system comprises:

[0059] The gas guide pipeline 101, the condensing oil-gas separator 102, the temperature controller 103 and the controller 104,

[0060] The gas outlet of the crankcase of the hydrogen internal combustion engine is communicated with the inlet of the condensing oil-gas separator 102 through the gas guide pipeline 101, the temperature controller 103 is arranged in the gas guide pipeline 101, and the exhaust port of the condensing oil-gas separator 102 is communicated with the air inlet of the supercharger of the hydrogen internal combustion engine;

[0061] The controller 104 is electrically connected with the temperature controller 103 and the condensing oil-gas separator 102 respectively, and is used for controlling the condensing oil-gas separator 102 to operate in a full-power state when the water content of the crankcase is not less than a water analysis threshold value and the temperature of the mixture discharged by the crankcase is not less than a high-temperature limit value; and is also used for controlling the temperature controller 103 to control the temperature of the mixture in the gas guide pipeline 101 so that the temperature of the mixture is in a water condensation temperature range when the temperature of the mixture is not in the water condensation temperature range.

[0062] It should be noted that in the actual application scenario, the above-mentioned temperature controller 103 can be a temperature control device that is communicated with the cooling system of the hydrogen internal combustion engine and uses high-temperature or low-temperature medium in the cooling system to control the temperature of the mixture in the gas guide pipeline. It can also be a temperature control device composed of an electric heating device and an electric refrigeration device. The specific type of the above-mentioned temperature controller 103 is not limited and described in detail in the present application.

[0063] It should be noted that in the actual application scenario, the above-mentioned condensing oil-gas separator 102 is an oil-gas separator with a condensation zone and a separation zone. After the hydrogen internal combustion engine burns hydrogen fuel, the mixture discharged by the hydrogen internal combustion engine is a gaseous mixture including residual hydrogen, water vapor and oil vapor. The existing centrifugal oil-gas separator for vehicles mainly separates gas and oil vapor to provide high-temperature gas for the supercharger. This results in that the gas and oil separated by the existing oil-gas separator include water vapor. The present application arranges the temperature controller 103 in the gas guide pipeline 101 that communicates the gas outlet of the crankcase with the inlet of the condensing oil-gas separator 102, and controls the temperature controller 103 to control the temperature of the mixture in the gas guide pipeline 101 so that the temperature of the mixture is in a water condensation temperature range when the temperature of the mixture is not in the water condensation temperature range. Thus, the separation efficiency of the condensing oil-gas separator for water vapor in the mixture is improved, the water content in the discharged gas and oil is reduced, and the water content in the gas input into the crankcase by the supercharger and the water content in the oil in the oil sump of the crankcase are reduced, and the inhibition effect on the oil emulsification phenomenon is improved.

[0064] It should be noted that in the actual application scene, due to the increase of hydrogen fuel injection amount of the hydrogen internal combustion engine under high load, the hydrogen concentration, water content and temperature in the crankcase are increased, which may cause the hydrogen in the crankcase to be prone to deflagration under high temperature, and the high water content may also increase the risk of water analysis, thereby causing oil emulsification. Therefore, in the case of high water content and temperature, the outflow rate of the gas in the crankcase needs to be increased. However, when the hydrogen internal combustion engine is under high load, the supercharger needs to prioritize the operation of the hydrogen internal combustion engine, thereby causing the flow rate of the gas output from the supercharger to the crankcase to be reduced due to the reduced gas amount. Therefore, in the case that the water content in the crankcase is not less than the water analysis threshold and the temperature of the mixture discharged from the crankcase is not less than the high temperature limit, the condensing oil-gas separator 102 is controlled to operate in a full power state, thereby increasing the outflow rate of the gas in the crankcase, and the suppression effect on hydrogen deflagration and oil emulsification is improved, and the operation reliability of the hydrogen internal combustion engine is improved.

[0065] In the case that the water content in the crankcase is not less than the water analysis threshold and the temperature of the mixture discharged from the crankcase is not less than the high temperature limit, the condensing oil-gas separator is controlled to operate in a full power state, thereby increasing the outflow rate of the gas in the crankcase, and the suppression effect on hydrogen deflagration and oil emulsification is improved. In addition, the temperature controller is arranged in the middle of the gas guide pipeline communicating the gas outlet of the crankcase and the inlet of the condensing oil-gas separator, and the temperature controller is controlled to control the temperature of the mixture in the gas guide pipeline to be in the water condensation temperature range in the case that the temperature of the mixture is not in the water condensation temperature range, so as to improve the separation efficiency of the condensing oil-gas separator on the water vapor in the mixture, reduce the water content in the exhaust gas and the oil, and further reduce the water content of the gas input into the crankcase by the supercharger and the water content of the oil in the oil sump of the crankcase, and the suppression effect on oil emulsification is improved. Therefore, the suppression effect on hydrogen deflagration and oil emulsification is improved, and the operation reliability of the hydrogen internal combustion engine is improved.

[0066] In a possible implementation, the crankcase gas supplementing system provided in the first aspect of the present application further includes:

[0067] The first flow regulating valve, the second flow regulating valve, the first gas supplementing pipeline and the second gas supplementing pipeline,

[0068] The first end of the first gas supplementing pipeline is in communication with the outlet of the supercharger, the second end of the first gas supplementing pipeline is in communication with the gas inlet of the crankcase, the first end of the second gas supplementing pipeline is in communication with the outlet of the air filter of the hydrogen internal combustion engine, and the second end of the second gas supplementing pipeline is in communication with the gas inlet of the crankcase;

[0069] The first flow regulating valve is arranged in the first gas supplementing pipeline, and the second flow regulating valve is arranged in the second gas supplementing pipeline.

[0070] The controller 104 is electrically connected with the first flow regulating valve and the second flow regulating valve respectively, for controlling the first flow regulating valve and the second flow regulating valve to open to the opening degree suitable for the ambient humidity and the rotating speed of the hydrogen internal combustion engine respectively, wherein the opening degree suitable for the ambient humidity and the rotating speed of the hydrogen internal combustion engine of the first flow regulating valve is different from the opening degree suitable for the ambient humidity and the rotating speed of the hydrogen internal combustion engine of the second flow regulating valve.

[0071] It should be noted that in the actual application scenario, since the supercharger is driven to operate by the hydrogen internal combustion engine, when the hydrogen internal combustion engine is in a high-load operating state, the supercharger can continuously output a large amount of high-temperature and high-pressure gas, but when the hydrogen internal combustion engine is in a low-load operating state, the supercharger will not be able to stably and continuously output high-temperature and high-pressure gas, thereby causing the gas amount for the crankcase air supplement to be unable to meet the air supplement demand of the crankcase. Therefore, the present application provides a two-way air inlet gas path structure by configuring the first air supplement pipeline communicating the outlet of the supercharger and the air inlet of the crankcase, and the second air supplement pipeline communicating the outlet of the air filter and the air inlet of the crankcase, thereby supplementing the reduced gas output of the supercharger due to the load state of the hydrogen internal combustion engine by using the gas output by the air filter, and further meeting the air supplement demand of the crankcase under different load states, thereby improving the operation reliability of the hydrogen internal combustion engine.

[0072] It should be noted that in the actual application scenario, since the air filter is a device for guiding ambient air into the hydrogen internal combustion engine or the crankcase, this causes the water content of the gas input by the air filter to be high in the case that the ambient humidity is high, thereby causing the water content of the gas entering the crankcase to increase. Therefore, the present application controls the first flow regulating valve and the second flow regulating valve to open to the opening degree suitable for the ambient humidity and the rotating speed of the hydrogen internal combustion engine respectively, and the opening degree suitable for the ambient humidity and the rotating speed of the hydrogen internal combustion engine of the first flow regulating valve is different from the opening degree suitable for the ambient humidity and the rotating speed of the hydrogen internal combustion engine of the second flow regulating valve, thereby adjusting the opening degree of the flow regulating valve by using the high-temperature gas output by the supercharger to heat and dilute the gas in the crankcase, thereby avoiding the risk of water analysis of the air in the crankcase due to the excessively high water content of the gas input by the air filter, and improving the inhibition effect on oil emulsification.

[0073] It should be noted that in the actual application scenario, the opening degree adapted to the ambient humidity and the speed of the hydrogen internal combustion engine can be determined according to the test calibration of the hydrogen internal combustion engine. For example, in the case that the speed of the hydrogen internal combustion engine is in the high-speed interval and the ambient humidity is low, because the ambient humidity is low, the water content of the gas output by the air filter is low, and the high-speed interval causes the air volume output by the supercharger to decrease, therefore, the opening degree of the second flow regulating valve can be configured to be greater than the opening degree of the first flow regulating valve, so as to supplement the air volume required by the crankcase intake with the air volume output by the air filter. In the case that the speed of the hydrogen internal combustion engine is in the high-speed interval and the ambient humidity is high, because the ambient humidity is high, the water content of the gas output by the air filter is high, therefore, the opening degree of the first flow regulating valve can be configured to be greater than the opening degree of the second flow regulating valve, so as to dilute and heat the crankcase gas with the high-temperature gas output by the supercharger. The specific opening degree is not limited and described in detail in the present application.

[0074] In a possible implementation, the controller 104 is further configured to control the condensing oil-gas separator 102 to operate in the minimum power state when the water content is less than the water analysis threshold and the mixture temperature is less than the low temperature limit.

[0075] Or, when the water content is less than the water analysis threshold and the mixture temperature is not less than the low temperature limit and less than the high temperature limit, the controller 104 is configured to control the condensing oil-gas separator 102 to operate in the first power state.

[0076] Or, when the water content is less than the water analysis threshold and the mixture temperature is not less than the high temperature limit, the controller 104 is configured to control the condensing oil-gas separator 102 to operate in the second power state.

[0077] Or, when the water content is not less than the water analysis threshold and the mixture temperature is less than the low temperature limit, the controller 104 is configured to control the condensing oil-gas separator 102 to operate in the third power state.

[0078] Or, when the water content is not less than the water analysis threshold and the mixture temperature is not less than the low temperature limit and less than the high temperature limit, the controller 104 is configured to control the condensing oil-gas separator 102 to operate in the fourth power state, wherein the operating power of the fourth power state is greater than the operating power of the third power state, the operating power of the third power state is greater than the operating power of the second power state, the operating power of the second power state is greater than the operating power of the first power state, and the operating power of the first power state is greater than the operating power of the minimum power state.

[0079] It should be noted that in the actual application scenario, the water analysis threshold is the minimum temperature value at which water is analyzed in the crankcase gas.

[0080] It should be noted that in the actual application scenario, the low temperature limit value represents the temperature value at which the hydrogen deflagration phenomenon does not occur, and the high temperature limit value represents the higher temperature value at which the hydrogen deflagration phenomenon occurs. The low temperature limit value is less than the high temperature limit value. The low temperature limit value and the high temperature limit value can be determined based on the test calibration results of the hydrogen internal combustion engine, and the specific values of the low temperature limit value and the high temperature limit value are not limited and described in detail in the present application.

[0081] It should be noted that in the actual application scenario, the mixture temperature represents the risk degree of the hydrogen deflagration phenomenon, and the water content rate represents the risk degree of the oil emulsification phenomenon. Therefore, the present application compares the water content rate with the water analysis-out threshold value, compares the mixture temperature with the low temperature limit value and the high temperature limit value respectively, and controls the power state of the condensing oil-gas separator based on the comparison result, so as to dynamically adjust the operating power of the oil-gas separator, so as to reduce the system energy consumption while ensuring the inhibition effect of the hydrogen deflagration phenomenon and the oil emulsification phenomenon.

[0082] In one possible implementation, the crankcase air charging system provided by the first aspect and any possible implementation of the first aspect further includes:

[0083] The temperature sensor, the four-way valve and the heating device, the first end of the four-way valve is in communication with the second end of the first air charging pipeline, the second end of the four-way valve is in communication with the second end of the second air charging pipeline, the third end of the four-way valve is in communication with the air inlet of the crankcase, the fourth end of the four-way valve is in communication with the air inlet of the heating device, the air outlet of the heating device is in communication with the air inlet of the crankcase, and the temperature sensor is arranged inside the four-way valve;

[0084] The controller 104 is electrically connected with the temperature sensor, the four-way valve and the heating device, and is configured to control the first end, the second end and the third end of the four-way valve to be conductive and the fourth end of the four-way valve to be closed when the temperature of the mixed gas collected by the temperature sensor is not less than the water analysis-out temperature threshold value, so as to guide the intake of the first air charging pipeline and the second air charging pipeline into the air inlet of the crankcase; and is further configured to control the first end, the second end and the fourth end of the four-way valve to be conductive and the third end of the four-way valve to be closed when the temperature of the mixed gas is less than the water analysis-out temperature threshold value, so as to guide the intake of the first air charging pipeline and the second air charging pipeline into the heating device, and control the heating device to heat the intake to not less than the water analysis-out temperature threshold value, and then guide the heated intake into the air inlet of the crankcase.

[0085] It should be noted that in actual application scenarios, due to the fact that the moisture in the mixed gas cannot be completely removed, when the external environment temperature is too low, the moisture in the mixed gas may condense and precipitate due to the low-temperature environment during the process of flowing to the crankcase. Therefore, the first end of the four-way valve is in communication with the second end of the first air supplement pipeline, the second end of the four-way valve is in communication with the second end of the second air supplement pipeline, the third end of the four-way valve is in communication with the air inlet of the crankcase, the fourth end of the four-way valve is in communication with the air inlet of the heating device, the air outlet of the heating device is in communication with the air inlet of the crankcase, and the temperature sensor is arranged in the four-way valve. In the case that the temperature of the mixed gas is less than the water precipitation temperature threshold, the first end, the second end and the fourth end of the four-way valve are controlled to be conductive, and the third end of the four-way valve is closed, so as to guide the intake air of the first air supplement pipeline and the second air supplement pipeline into the heating device, and control the heating device to heat the intake air to not less than the water precipitation temperature threshold, and then guide the heated intake air into the air inlet of the crankcase, thereby avoiding the risk of oil emulsification caused by the precipitation of water due to the decrease of the temperature of the gas during the flowing process.

[0086] It should be noted that in actual application scenarios, since the first air supplement pipeline and the second air supplement pipeline continuously convey gas during operation, after the first end, the second end and the fourth end of the four-way valve are controlled to be conductive and the third end of the four-way valve is closed, the pressure of the gas in the pipeline will gradually increase before heating is completed. Therefore, in order to avoid damage to the pipeline or device caused by high pressure, a pressure relief valve can be arranged in the heating device, or the third end of the four-way valve can be closed to the minimum opening degree to relieve pressure.

[0087] In a possible implementation, the crankcase air supplement system provided by the first aspect and any possible implementation of the first aspect of the present application further comprises:

[0088] The first oil guide pipeline, the oil water content sensor, the bypass valve, the heating container, the booster pump and the second oil guide pipeline, the first oil guide pipeline is in communication with the oil outlet of the oil-gas separator and the oil inlet of the oil pan of the crankcase, the oil water content sensor and the bypass valve are arranged in the first oil guide pipeline in sequence along the flow direction of the oil, the bypass port of the bypass valve is in communication with the oil inlet of the heating container, the oil outlet of the heating container bypasses the first oil guide pipeline through the second oil guide pipeline, and the bypass position is located upstream of the oil water content sensor, and the booster pump is arranged in the second oil guide pipeline;

[0089] The controller 104 is also electrically connected with the oil water content sensor, the bypass valve, the heating container and the booster pump, respectively, for controlling the bypass opening of the bypass valve to be closed to guide the oil discharged from the oil outlet into the oil pan of the crankcase when the oil water content collected by the oil water content sensor is less than the oil water content threshold; and for controlling the outlet of the bypass valve to be closed and the bypass opening to be opened to guide the oil discharged from the oil outlet into the heating container, and controlling the heating container to heat the guided oil to evaporate the water in the oil, and controlling the booster pump to be started to guide the oil with the evaporated water into the first oil guiding pipeline when the oil water content is not less than the oil water content threshold.

[0090] It should be noted that in actual application scenarios, water will inevitably remain in the oil separated by the oil-gas separator, and only a small amount of water will accumulate over a long period of time, which will cause the oil in the oil pan to appear oil emulsification. Therefore, the first oil guiding pipeline is configured to communicate the oil outlet of the condensing oil-gas separator and the oil inlet of the oil pan of the crankcase, the oil water content sensor and the bypass valve are arranged in the air guiding pipeline 101 in sequence along the flow direction of the oil, the bypass opening of the bypass valve is communicated with the oil inlet of the heating container, the oil inlet of the heating container bypasses the first oil guiding pipeline through the second oil guiding pipeline, and the bypass position is located upstream of the oil water content sensor, and the booster pump is arranged in the second oil guiding pipeline and is configured to control the outlet of the bypass valve to be closed and the bypass opening to be opened to guide the oil discharged from the oil outlet into the heating container, and control the heating container to heat the guided oil to evaporate the water in the oil, and control the booster pump to be started to guide the oil with the evaporated water into the first oil guiding pipeline when the oil water content is not less than the oil water content threshold, thereby further reducing the water content of the separated oil, and further improving the inhibition effect on the oil emulsification phenomenon of the oil pan.

[0091] To facilitate the understanding of the structure of the crankcase air supply system provided by the first aspect and any possible implementation of the first aspect of the present application, the present application is described in combination with a possible implementation of the present application:

[0092] As Figure 2As shown, it is a structural schematic diagram of a crankcase air charging system. The crankcase air charging system is applied to a hydrogen internal combustion engine system. The hydrogen internal combustion engine system comprises a supercharger, an air cleaner, a combustion chamber, a crankcase and an oil pan. The first outlet of the air cleaner is in communication with the first air inlet of the supercharger, and the first outlet of the supercharger is in communication with the air inlet of the combustion chamber. The second outlet of the supercharger is in communication with the first end of the four-way valve 107 through the first air charging pipeline 105, the second outlet of the air cleaner is in communication with the second end of the four-way valve 107 through the second air charging pipeline 106, the third end of the four-way valve 107 is in communication with the air inlet of the crankcase, the fourth end of the four-way valve 107 is in communication with the air inlet of the heating device 108, and the air outlet of the heating device 108 is in communication with the air inlet of the crankcase. The air outlet of the crankcase is in communication with the inlet of the condensing oil-gas separator 102 through the air guide pipeline 101, and the temperature controller 103 is arranged in the air guide pipeline 101. The exhaust port of the condensing oil-gas separator 102 is in communication with the second air inlet of the supercharger. The oil outlet of the condensing oil-gas separator 102 is in communication with the oil inlet of the oil pan through the first oil guide pipeline 109, and the bypass valve 110 is arranged in the first oil guide pipeline 109. The bypass port of the bypass valve 110 is in communication with the oil inlet of the heating container 111, and the oil outlet of the heating container 111 bypasses the first oil guide pipeline 109 through the second oil guide pipeline 112. The supercharging pump 113 is arranged in the second oil guide pipeline 112. The first flow regulating valve 114 is arranged in the first air charging pipeline 105, and the second flow regulating valve 115 is arranged in the second air charging pipeline 106. The first flow regulating valve 114, the second flow regulating valve 115, the four-way valve 107, the heating device 108, the condensing oil-gas separator 102, the temperature controller 103, the bypass valve 110, the heating container 111 and the supercharging pump 113 are electrically connected with the controller 104.

[0093] The second aspect of the present application provides a crankcase air charging control method, which is applied to the controller of the crankcase air charging system provided by the first aspect and any possible implementation of the first aspect of the present application. The crankcase air charging control method comprises the following steps.

[0094] S301, in the case that the water content of the crankcase is not less than the water analysis threshold value, and the temperature of the mixture discharged from the crankcase is not less than the high temperature limit value, the condensing oil-gas separator is controlled to operate in a full power state;

[0095] S302, in the case that the temperature of the mixture is not in the water condensation temperature range, the temperature controller controls the temperature of the mixture in the air guide pipeline to be in the water condensation temperature range.

[0096] It should be noted that in an actual application scenario, the above steps S301 and S302 can be executed independently or sequentially. The present application does not make excessive limitation and elaboration on the execution steps of the above steps S301 and S302.

[0097] In a possible implementation, the crankcase air charging system further includes:

[0098] The first flow regulating valve, the second flow regulating valve, the first air charging pipeline, and the second air charging pipeline,

[0099] The first end of the first air charging pipeline is in communication with the outlet of the supercharger of the hydrogen internal combustion engine, the second end of the first air charging pipeline is in communication with the air inlet of the crankcase, the first end of the second air charging pipeline is in communication with the outlet of the air filter of the hydrogen internal combustion engine, and the second end of the second air charging pipeline is in communication with the air inlet of the crankcase;

[0100] The first flow regulating valve is disposed in the first air charging pipeline, and the second flow regulating valve is disposed in the second air charging pipeline;

[0101] The crankcase air charging control method provided in the second aspect of the present application further includes:

[0102] The first flow regulating valve and the second flow regulating valve are respectively controlled to open to an opening degree that is adapted to the ambient humidity and the rotating speed of the hydrogen internal combustion engine, wherein the opening degree that is adapted to the ambient humidity and the rotating speed of the hydrogen internal combustion engine of the first flow regulating valve is different from the opening degree that is adapted to the ambient humidity and the rotating speed of the hydrogen internal combustion engine of the second flow regulating valve.

[0103] In a possible implementation, the crankcase air charging control method provided in the second aspect of the present application further includes:

[0104] In a case where the water content rate is less than the water analysis threshold value and the mixture temperature is less than the low temperature limit value, the condensing oil-gas separator is controlled to operate in a minimum power state;

[0105] Or, in a case where the water content rate is less than the water analysis threshold value and the mixture temperature is not less than the low temperature limit value and less than the high temperature limit value, the condensing oil-gas separator is controlled to operate in a first power state;

[0106] Or, in a case where the water content rate is less than the water analysis threshold value and the mixture temperature is not less than the high temperature limit value, the condensing oil-gas separator is controlled to operate in a second power state;

[0107] Or, in a case where the water content rate is not less than the water analysis threshold value and the mixture temperature is less than the low temperature limit value, the condensing oil-gas separator is controlled to operate in a third power state;

[0108] Or, in the case that the water content is not less than the water analysis threshold, and the mixture temperature is not less than the low temperature limit and less than the high temperature limit, the condensing oil-gas separator is controlled to operate in a fourth power state, wherein the operating power of the fourth power state is greater than the operating power of the third power state, the operating power of the third power state is greater than the operating power of the second power state, the operating power of the second power state is greater than the operating power of the first power state, and the operating power of the first power state is greater than the operating power of the minimum power state.

[0109] In a possible implementation, the crankcase air charging system further includes:

[0110] The temperature sensor, the four-way valve, and the heating device, the first end of the four-way valve is in communication with the second end of the first air charging pipeline, the second end of the four-way valve is in communication with the second end of the second air charging pipeline, the third end of the four-way valve is in communication with the air inlet of the crankcase, the fourth end of the four-way valve is in communication with the air inlet of the heating device, the air outlet of the heating device is in communication with the air inlet of the crankcase, and the temperature sensor is arranged inside the four-way valve;

[0111] The crankcase air charging control method provided in the second aspect of the application further includes:

[0112] In the case that the temperature of the mixed gas collected by the temperature sensor is not less than the water analysis temperature threshold, the first end, the second end, and the third end of the four-way valve are controlled to be conductive, and the fourth end of the four-way valve is controlled to be closed, so as to guide the intake air of the first air charging pipeline and the second air charging pipeline into the air inlet of the crankcase of the hydrogen internal combustion engine.

[0113] In the case that the temperature of the mixed gas is less than the water analysis temperature threshold, the first end, the second end, and the fourth end of the four-way valve are controlled to be conductive, and the third end of the four-way valve is controlled to be closed, so as to guide the intake air of the first air charging pipeline and the second air charging pipeline into the heating device, and control the heating device to heat the intake air to not less than the water analysis temperature threshold, and then guide the heated intake air into the air inlet of the crankcase.

[0114] In a possible implementation, the crankcase air charging system further includes:

[0115] The first oil guide pipeline, the oil water content sensor, the bypass valve, the heating container, the booster pump, and the second oil guide pipeline, the first oil guide pipeline is in communication with the oil outlet of the condensing oil-gas separator and the oil inlet of the oil sump of the crankcase, the oil water content sensor and the bypass valve are sequentially arranged in the first oil guide pipeline along the oil flow direction, the bypass port of the bypass valve is in communication with the oil inlet of the heating container, the oil outlet of the heating container bypasses the first oil guide pipeline through the second oil guide pipeline, and the bypass position is located upstream of the oil water content sensor, and the booster pump is arranged in the second oil guide pipeline.

[0116] The crankcase air charging control method provided in the second aspect of the application further includes:

[0117] When the oil water content detected by the oil water content sensor is less than the oil water content threshold, the bypass port of the bypass valve is controlled to close so as to guide the oil discharged from the oil drain port of the condensing oil-gas separator into the oil pan of the crankcase;

[0118] When the water content of the engine oil is not less than the oil water content threshold, the outlet of the bypass valve is controlled to be closed and the bypass port is opened to introduce the engine oil discharged from the oil drain port into the heating container, and the heating container is controlled to heat the introduced engine oil to evaporate the water in the engine oil, and the boost pump is controlled to start to introduce the engine oil from which the water has evaporated into the first oil guide pipe.

[0119] A third aspect of the present application provides a vehicle, comprising: a crankcase air replenishment system as provided in the first aspect of the present application and any possible implementation of the first aspect.

[0120] The embodiment of the present application also provides a controller, the structural diagram of which is as follows: Figure 3 The controller in the embodiments of the present application may be a server, a PC, a PAD, a mobile phone, an ECU (Electronic Control Unit), a VCU (Vehicle Control Unit), an MCU (Micro Controller Unit), an HCU (Hybrid Control Unit), etc. Figure 3 The controller shown is merely an example and should not limit the functions and scope of use of the embodiments of the present application.

[0121] like Figure 3 As shown, the controller may include a processing device (e.g., a central processing unit, graphics processing unit, etc.) 301, which can perform various appropriate actions and processes based on programs stored in a read-only memory (ROM) 302 or programs loaded from a storage device 308 into a random access memory (RAM) 303. When the controller is powered on, RAM 303 also stores various programs and data required for controller operation. Processing device 301, ROM 302, and RAM 303 are interconnected via a bus 304. An input / output (I / O) interface 305 is also connected to bus 304.

[0122] Generally, the following devices can be connected to the I / O interface 305: input devices 306 including, for example, a touch screen, a touch pad, a keyboard, a mouse, a camera, a microphone, a torque sensor, a hydrogen concentration sensor, and the like; output devices 307 including, for example, a liquid crystal display (LCD), a speaker, a flow regulating valve, and the like; storage devices 308 including, for example, a memory card, a hard disk, and the like; and communication devices 309. The communication devices 309 can allow the controller to communicate wirelessly or by wire with other devices to exchange data. Although Figure 3 The controller is shown with various devices, but it is understood that all of the shown devices need not be implemented or present. More or fewer devices can alternatively be implemented or present.

[0123] The embodiments of the present application further provide a computer program product, comprising computer readable instructions, which, when executed on an electronic device, cause the electronic device to implement any of the crankcase gas compensation control methods provided by the embodiments of the present application.

[0124] The embodiments of the present application further provide a computer readable storage medium, which carries one or more computer programs, which, when executed by an electronic device, can cause the electronic device to implement any of the crankcase gas compensation control methods provided by the embodiments of the present application.

[0125] In addition, it should be noted that the device embodiments described above are merely illustrative, wherein the units described as separate components can or can not be physically separated, and the components displayed as units can or can not be physical units, i.e. they can be located in one place, or distributed on multiple network units. Part or all of the modules can be selected according to actual needs to achieve the purpose of the embodiments of the present application. In addition, the connection relationship between the modules in the device embodiments provided by the present application indicates that there is a communication connection between them, which can be implemented as one or more communication buses or signal lines.

[0126] Those skilled in the art can clearly understand that the application can be implemented by means of software plus necessary universal hardware, and of course can also be implemented by means of dedicated hardware including special integrated circuit, special CPU, special memory, special component, etc. Generally, any function completed by computer program can be easily implemented by corresponding hardware, and the specific hardware structure for implementing the same function can also be various, such as analog circuit, digital circuit or special circuit, etc. However, for the application, software program implementation is a better embodiment. Based on such understanding, the technical solution of the application or the part of the application which makes contribution to the prior art can be embodied in the form of software product, which is stored in readable storage medium, such as computer floppy disk, U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk, etc., and includes a plurality of instructions for making a computer device (which can be personal computer, training device or network device, etc.) execute the method described in various embodiments of the application.

[0127] In the above embodiments, the implementation can be achieved by software, hardware, firmware or any combination thereof, entirely or partially. When implemented by software, the implementation can be achieved in the form of a computer program product, entirely or partially.

[0128] The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the flow or function described in the embodiments of the application is generated entirely or partially. The computer can be a general-purpose computer, a special-purpose computer, a computer network or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another, for example, the computer instructions can be transmitted from one website, computer, training device or data center to another website, computer, training device or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) mode. The computer-readable storage medium can be any available medium that can be stored by a computer or a data storage device such as a training device, a data center, etc. integrated with one or more available media sets. The available medium can be a magnetic medium (such as a floppy disk, a hard disk, a magnetic tape), an optical medium (such as a DVD), or a semiconductor medium (such as a solid state disk (SSD)), etc.

Claims

1. A crankcase ventilation system characterized in that, The application is applied to a hydrogen internal combustion engine, and the crankcase air supplementing system comprises: a gas guide pipeline, a condensing oil-gas separator, a temperature controller and a controller, an air outlet of the crankcase of the hydrogen internal combustion engine is communicated with an inlet of the condensing oil-gas separator through the gas guide pipeline, the temperature controller is arranged in the gas guide pipeline, and an air outlet of the condensing oil-gas separator is communicated with an air inlet of a supercharger of the hydrogen internal combustion engine; the controller is electrically connected with the temperature controller and the condensing oil-gas separator respectively, is used for controlling the condensing oil-gas separator to operate in a full-power state when a water content rate of the crankcase is not less than a water analysis-out threshold value and a mixture temperature discharged by the crankcase is not less than a high-temperature limit value, and is used for controlling the temperature controller to control the temperature of the mixture in the gas guide pipeline so that the mixture temperature is in a water condensation temperature range when the mixture temperature is not in the water condensation temperature range.

2. The crankcase gas porting system of claim 1, wherein, The crankcase air supplementing system further comprises: a first flow regulating valve, a second flow regulating valve, a first air supplementing pipeline and a second air supplementing pipeline, a first end of the first air supplementing pipeline is communicated with an outlet of the supercharger, a second end of the first air supplementing pipeline is communicated with an air inlet of the crankcase, a first end of the second air supplementing pipeline is communicated with an outlet of an air filter of the hydrogen internal combustion engine, and a second end of the second air supplementing pipeline is communicated with the air inlet of the crankcase; the first flow regulating valve is arranged in the first air supplementing pipeline, and the second flow regulating valve is arranged in the second air supplementing pipeline; the controller is electrically connected with the first flow regulating valve and the second flow regulating valve respectively, and is used for controlling the first flow regulating valve and the second flow regulating valve to open to an opening degree adapted to both an ambient humidity and a rotating speed of the hydrogen internal combustion engine, wherein the opening degree adapted to both the ambient humidity and the rotating speed of the hydrogen internal combustion engine of the first flow regulating valve is different from that of the second flow regulating valve.

3. The crankcase gas porting system of claim 1, wherein, the controller is further used for controlling the condensing oil-gas separator to operate in a minimum-power state when the water content rate is less than the water analysis-out threshold value and the mixture temperature is less than a low-temperature limit value; or, the controller is further used for controlling the condensing oil-gas separator to operate in a first-power state when the water content rate is less than the water analysis-out threshold value and the mixture temperature is not less than the low-temperature limit value and less than the high-temperature limit value; or, the controller is further used for controlling the condensing oil-gas separator to operate in a second-power state when the water content rate is less than the water analysis-out threshold value and the mixture temperature is not less than the high-temperature limit value; or, the controller is further used for controlling the condensing oil-gas separator to operate in a third-power state when the water content rate is not less than the water analysis-out threshold value and the mixture temperature is less than the low-temperature limit value. Alternatively, when the water content is not less than the water analysis threshold, and the mixture temperature is not less than the low temperature limit and less than the high temperature limit, the condensing oil-gas separator is controlled to operate in a fourth power state, wherein the operating power of the fourth power state is greater than the operating power of the third power state, the operating power of the third power state is greater than the operating power of the second power state, the operating power of the second power state is greater than the operating power of the first power state, and the operating power of the first power state is greater than the operating power of the minimum power state.

4. The crankcase gas porting system of claim 2 wherein, The crankcase air supply system also includes: a temperature sensor, a four-way valve, and a heating device, wherein a first end of the four-way valve is in communication with the second end of the first air supply pipeline, a second end of the four-way valve is in communication with the second end of the second air supply pipeline, a third end of the four-way valve is in communication with the air inlet of the crankcase, a fourth end of the four-way valve is in communication with the air inlet of the heating device, an air outlet of the heating device is in communication with the air inlet of the crankcase, and the temperature sensor is disposed inside the four-way valve; The controller is electrically connected to the temperature sensor, the four-way valve and the heating device, respectively, and is used to control the first end, the second end and the third end of the four-way valve to be connected, and the fourth end of the four-way valve to be closed when the temperature of the mixed gas collected by the temperature sensor is not less than the water analysis temperature threshold, so as to introduce the intake air of the first air supply pipeline and the second air supply pipeline into the air inlet of the crankcase; it is also used to control the first end, the second end and the fourth end of the four-way valve to be connected, and the third end of the four-way valve to be closed when the temperature of the mixed gas is less than the water analysis temperature threshold, so as to introduce the intake air of the first air supply pipeline and the second air supply pipeline into the heating device, and control the heating device to heat the intake air to a temperature not less than the water analysis temperature threshold, and then introduce the heated intake air into the air inlet of the crankcase.

5. - Crankcase gas-refilling system according to any of claims 1 to 4, characterized in that, The crankcase air supply system also includes: a first oil guide line, an oil water content sensor, a bypass valve, a heating container, a boost pump, and a second oil guide line, wherein the first oil guide line communicates with the oil drain port of the condensing oil-gas separator and the oil inlet of the crankcase oil pan, the oil water content sensor and the bypass valve are sequentially arranged in the first oil guide line along the oil flow direction, the bypass port of the bypass valve is communicated with the oil inlet of the heating container, the oil outlet of the heating container bypasses the first oil guide line via the second oil guide line, and the bypass position is located upstream of the oil water content sensor, and the boost pump is deployed in the second oil guide line; The controller is also electrically connected with the oil water content sensor, the bypass valve, the heating container and the booster pump respectively, and is configured to control the bypass port of the bypass valve to be closed to guide the oil discharged from the oil outlet into the oil pan of the crankcase when the oil water content collected by the oil water content sensor is less than the oil water content threshold; and is further configured to control the outlet of the bypass valve to be closed and the bypass port to be opened to guide the oil discharged from the oil outlet into the heating container when the oil water content is not less than the oil water content threshold, control the heating container to heat the guided oil to evaporate the water in the oil, and control the booster pump to be started to guide the oil with evaporated water into the first oil guiding pipeline.

6. A method of control of crankcase gas admission, characterized in that The controller is applied to a crankcase air charging system, and the crankcase air charging system is the crankcase air charging system according to any one of claims 1 to 5. In a case where the water content of the crankcase is not less than the water analysis-out threshold and the temperature of the mixture discharged from the crankcase is not less than the high-temperature limit value, the condensing oil-gas separator is controlled to operate in a full-power state. In a case where the temperature of the mixture is not in the water condensation temperature range, the temperature controller is controlled to control the temperature of the mixture in the gas guiding pipeline, so that the temperature of the mixture is in the water condensation temperature range.

7. The crankcase gas control method according to claim 6, characterized by, The crankcase air charging system further comprises: a first flow regulating valve, a second flow regulating valve, a first air charging pipeline and a second air charging pipeline, a first end of the first air charging pipeline is in communication with an outlet of a supercharger of a hydrogen internal combustion engine, a second end of the first air charging pipeline is in communication with an air inlet of the crankcase, a first end of the second air charging pipeline is in communication with an outlet of an air filter of the hydrogen internal combustion engine, and a second end of the second air charging pipeline is in communication with the air inlet of the crankcase; the first flow regulating valve is arranged in the first air charging pipeline, and the second flow regulating valve is arranged in the second air charging pipeline; The crankcase air charging control method further comprises: the first flow regulating valve and the second flow regulating valve are respectively controlled to be opened to an opening degree adapted to the ambient humidity and the rotating speed of the hydrogen internal combustion engine, and the opening degree of the first flow regulating valve adapted to the ambient humidity and the rotating speed of the hydrogen internal combustion engine is different from the opening degree of the second flow regulating valve adapted to the ambient humidity and the rotating speed of the hydrogen internal combustion engine.

8. The crankcase gas control method of claim 6 wherein, The crankcase air charging control method further comprises: In a case where the water content is less than the water analysis-out threshold and the temperature of the mixture is less than the low-temperature limit value, the condensing oil-gas separator is controlled to operate in a minimum-power state; or, in a case where the water content is less than the water analysis-out threshold and the temperature of the mixture is not less than the low-temperature limit value and less than the high-temperature limit value, the condensing oil-gas separator is controlled to operate in a first-power state; or, in a case where the water content is less than the water analysis-out threshold and the temperature of the mixture is not less than the high-temperature limit value, the condensing oil-gas separator is controlled to operate in a second-power state; or, when the water content is not less than the water separation threshold and the mixture temperature is less than a low temperature limit, controlling the condensing oil-gas separator to operate in a third power state; Alternatively, when the water content is not less than the water analysis threshold, and the mixture temperature is not less than the low temperature limit and less than the high temperature limit, the condensing oil-gas separator is controlled to operate in a fourth power state, wherein the operating power of the fourth power state is greater than the operating power of the third power state, the operating power of the third power state is greater than the operating power of the second power state, the operating power of the second power state is greater than the operating power of the first power state, and the operating power of the first power state is greater than the operating power of the minimum power state.

9. The crankcase gas control method of claim 7 wherein, The crankcase air supply system also includes: a temperature sensor, a four-way valve, and a heating device, wherein a first end of the four-way valve is in communication with the second end of the first air supply pipeline, a second end of the four-way valve is in communication with the second end of the second air supply pipeline, a third end of the four-way valve is in communication with the air inlet of the crankcase, a fourth end of the four-way valve is in communication with the air inlet of the heating device, an air outlet of the heating device is in communication with the air inlet of the crankcase, and the temperature sensor is disposed inside the four-way valve; The crankcase air supply control method further includes: When the mixed gas temperature collected by the temperature sensor is not less than a water separation temperature threshold, controlling the first end, the second end, and the third end of the four-way valve to be conductive, and closing the fourth end of the four-way valve to guide the intake air of the first air supply line and the second air supply line into the air intake port of the crankcase of the hydrogen internal combustion engine; When the temperature of the mixed gas is lower than the water analysis temperature threshold, the first end, the second end and the fourth end of the four-way valve are controlled to be connected, and the third end of the four-way valve is closed, so as to introduce the intake air of the first air supply pipeline and the second air supply pipeline into the heating device, and the heating device is controlled to heat the intake air to a temperature not lower than the water analysis temperature threshold, and then introduce the heated intake air into the intake port of the crankcase.

10. The crankcase gas control method according to any one of claims 6 to 9, characterized by, The crankcase air supply system also includes: a first oil guide line, an oil water content sensor, a bypass valve, a heating container, a boost pump, and a second oil guide line, wherein the first oil guide line communicates with the oil drain port of the condensing oil-gas separator and the oil inlet of the crankcase oil pan, the oil water content sensor and the bypass valve are sequentially arranged in the first oil guide line along the oil flow direction, the bypass port of the bypass valve is communicated with the oil inlet of the heating container, the oil outlet of the heating container bypasses the first oil guide line through the second oil guide line, and the bypass position is located upstream of the oil water content sensor, and the boost pump is deployed in the second oil guide line; The crankcase air supply control method further includes: When the oil water content detected by the oil water content sensor is less than an oil water content threshold, controlling the bypass port of the bypass valve to close so as to guide the oil discharged from the oil drain port of the condensing oil-gas separator into the oil sump of the crankcase; In a case where the engine oil water content is not less than an engine oil water content threshold value, the bypass valve is controlled to close the outlet and open the bypass port, so as to guide the engine oil discharged from the oil discharge port into a heating container, and the heating container is controlled to heat the guided engine oil, so as to evaporate water in the engine oil, and a booster pump is controlled to start, so as to guide the engine oil after water evaporation into the first oil guiding line.

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