Hydrogen engine and vehicle

Abstract

The application discloses a hydrogen engine and a vehicle, wherein the hydrogen engine comprises a crankcase, a first cavity, a second cavity, a crank passage system and a separation system; the first cavity is communicated with the crankcase, and the first cavity and the second cavity are isolated from each other; the crank passage system is connected with the second cavity in a pipeline mode; the crank passage system is used for separating oil gas of mixed gas in the second cavity; the separation system comprises a first hydrogen storage device and a separation unit; the first hydrogen storage device comprises a first inlet; the separation unit comprises a hydrogen separation device, and a third cavity and a fourth cavity which are isolated by the hydrogen separation device; the third cavity is connected with the first cavity and the second cavity in a pipeline mode respectively, and the fourth cavity is connected with the first inlet of the first hydrogen storage device in a pipeline mode; and the separation unit is used for separating hydrogen at least. According to the technical scheme, hydrogen separation of the mixed gas is realized, explosion risk is avoided, and unburned hydrogen is prevented from entering an intake manifold to affect an air-fuel ratio of the engine.

Description

Technical Field

[0001] This invention relates to the field of vehicle control technology, and more particularly to a hydrogen engine and a vehicle. Background Technology

[0002] When hydrogen is burned in a hydrogen engine, the high-temperature water vapor produced can easily accumulate in the crankcase, causing oil emulsification. At the same time, unburned hydrogen can leak into the crankcase. Since existing oil-gas separators cannot separate the hydrogen from the mixture, there is a risk of explosion when the hydrogen concentration in the crankcase reaches a certain level, which seriously affects the safety of the hydrogen engine.

[0003] To address these issues, current solutions primarily involve active ventilation and active air injection to dilute water vapor and unburned hydrogen in the crankcase, thereby reducing the risk of oil emulsification and the concentration of hydrogen in the crankcase. However, these solutions require electric pumps, which are bulky due to the large volume of air exchange or injection, making them impractical in real-world applications. Furthermore, active ventilation can cause the hydrogen-containing mixture in the crankcase to re-enter the intake manifold, making it difficult to precisely control the concentration and proportion of unburned hydrogen, thus affecting the engine's preset air-fuel ratio and disrupting normal engine operation. Summary of the Invention

[0004] This invention provides a hydrogen engine and vehicle to solve the problems existing in the prior art, realize hydrogen separation in the gas mixture to avoid the risk of explosion, and at the same time, prevent unburned hydrogen from entering the intake manifold and affecting the air-fuel ratio of the engine.

[0005] In a first aspect, the present invention provides a hydrogen engine, comprising: a crankcase, a first chamber, a second chamber, a cranking system, and a separation system;

[0006] The first cavity is connected to the crankcase, and the first cavity and the second cavity are isolated from each other;

[0007] The bypass system is connected to the second cavity pipeline; the bypass system is used to separate oil and gas in the mixed gas in the second cavity;

[0008] The separation system includes a first hydrogen storage device and a separation unit; the first hydrogen storage device includes a first inlet; the separation unit includes a hydrogen separation device, and a third chamber and a fourth chamber isolated by the hydrogen separation device; the third chamber is connected to the first chamber and the second chamber via pipelines respectively, and the fourth chamber is connected to the first inlet pipeline of the first hydrogen storage device; the separation unit is used for at least separating hydrogen gas.

[0009] Optionally, the separation system further includes a first electric pump;

[0010] The first electric pump includes a first suction port and a first discharge port; the first suction port is connected to the first cavity pipe; the first discharge port is connected to the third cavity.

[0011] Optionally, the third cavity includes a first sub-cavity and a second sub-cavity;

[0012] The first sub-cavity is connected to the first cavity pipe; the second sub-cavity is connected to the second cavity pipe; the hydrogen separation device is disposed between the first sub-cavity and the fourth cavity;

[0013] A first check valve is provided between the first sub-cavity and the second sub-cavity; the first check valve is used to control the flow of the mixed gas in the first sub-cavity to the second sub-cavity.

[0014] Optionally, the opening pressure of the first one-way valve is greater than the optimal hydrogen transmembrane pressure of the hydrogen separation device.

[0015] Optionally, the first electric pump (53) further includes a second suction port; the second sub-cavity (5222) includes a first outlet (5222a) and a second outlet (5222b);

[0016] The second sub-cavity (5222) is provided with at least one first hydrogen sensor (54); the first hydrogen sensor (54) is used to monitor the hydrogen content in the second sub-cavity (5222);

[0017] The first outlet (5222a) is turned on when the hydrogen content in the second sub-cavity (5222) is greater than or equal to a preset value; the second outlet (5222b) is turned on when the hydrogen content in the second sub-cavity (5222) is less than the preset value.

[0018] Optionally, the separation unit further includes a water-absorbing structure; the water-absorbing structure is used to separate water vapor from the mixed gas.

[0019] Optionally, the hydrogen engine further includes: a hydrogen supply system;

[0020] The first hydrogen storage device includes a hydrogen outlet; the hydrogen outlet is connected to the hydrogen supply system pipeline.

[0021] Optionally, the hydrogen engine further includes: an intake system and a second electric pump;

[0022] The second electric pump includes a third suction port and a second discharge port; the third suction port is connected to the ductwork system; and the second discharge port is connected to the intake system.

[0023] Optionally, at least one second hydrogen sensor is provided in the crankcase; the second hydrogen sensor is used to detect the hydrogen concentration in the crankcase.

[0024] In a second aspect, the present invention provides a vehicle comprising at least one of the hydrogen engines described above.

[0025] The technical solution of this invention includes a hydrogen engine comprising a crankcase, a first chamber, a second chamber, a crank-through system, and a separation system. The first chamber is connected to the crankcase, allowing the mixed gas that enters the crankcase during hydrogen combustion to enter the first chamber. The first chamber and the second chamber are isolated from each other. In the separation system, the third chamber of the separation unit is connected to the pipes of both the first and second chambers, and the fourth chamber is connected to the first inlet pipe of the first hydrogen storage device. The separation unit is used to separate hydrogen. The second chamber is connected to the crank-through system, which is used to perform oil-gas separation on the mixed gas in the second chamber. This allows the mixed gas in the first chamber to have hydrogen separated by the separation unit before entering the second chamber, where the mixed gas in the second chamber undergoes oil-gas separation through the crank-through system. This enables the hydrogen engine to achieve hydrogen separation in the mixed gas, and the separated hydrogen is processed separately to avoid the risk of explosion. Simultaneously, it prevents unburned hydrogen from entering the intake manifold and affecting the engine's air-fuel ratio, thereby improving the operational stability of the hydrogen engine.

[0026] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of a hydrogen engine provided in an embodiment of the present invention;

[0029] Figure 2 This is a structural schematic diagram of a vehicle provided in an embodiment of the present invention. Detailed Implementation

[0030] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0031] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in sequences other than those illustrated or described herein.

[0032] Figure 1 This is a schematic diagram of a hydrogen engine provided in an embodiment of the present invention. This embodiment provides a hydrogen engine, see reference... Figure 1 As shown, the hydrogen engine includes a crankcase 10, a first chamber 20, a second chamber 30, a crank-through system 40, and a separation system 50. The first chamber 20 is connected to the crankcase 10, and the first chamber 20 and the second chamber 30 are isolated from each other. The crank-through system 40 is pipe-connected to the second chamber 30. The crank-through system 40 is used to separate the oil and gas mixture in the second chamber 30. The separation system 50 includes a first hydrogen storage device 51 and a separation unit 52. The first hydrogen storage device 51 includes a first inlet. The separation unit 52 includes a hydrogen separation device 521, and a third chamber 522 and a fourth chamber 523 isolated by the hydrogen separation device 521. The third chamber 522 is pipe-connected to the first chamber 20 and the second chamber 30, respectively, and the fourth chamber 523 is connected to the first inlet pipe of the first hydrogen storage device 51. The separation unit 52 is used to separate hydrogen.

[0033] The hydrogen engine 01 includes a cylinder block 001, a piston 002, a cylinder head 003, and a cylinder head cover 004. The cylinder block 001, piston 002, and cylinder head 003 enclose a combustion chamber 90, and the cylinder block 001 and piston 002 enclose a crankcase 10.

[0034] In an alternative embodiment, continue to refer to Figure 1As shown, the hydrogen engine 01 also includes a hydrogen supply system 60 and an intake system 70. The hydrogen supply system 60 includes a second hydrogen storage device 61 and an injection device 62, which are connected by pipes. The injection device 62 is connected to the combustion chamber 90. The intake system 70 includes an air filter 71, a turbocharger 72, an intercooler 73, a throttle valve 74, and an intake manifold 75, which are connected by pipes in sequence. The intake manifold 75 is connected to the combustion chamber 90. When the hydrogen engine 01 is operating, fresh air enters the combustion chamber 90 via the intake system 70, passing sequentially through the air filter 71, turbocharger 72, intercooler 73, throttle valve 74, and intake manifold 75. Simultaneously, hydrogen from the second hydrogen storage device 61 is injected into the combustion chamber 90 in a measured amount via the injection device 62, according to signals from the engine control system. The hydrogen and fresh air mix in a preset ratio, and the resulting mixture is ignited by the ignition system (not shown in the figure). The mixture performs work to maintain normal engine operation. It is understandable that during the operation of the hydrogen engine 01, some of the mixture may enter the crankcase 10. If the mixture in the crankcase 10 is not treated, there is a risk of explosion if the concentration of unburned hydrogen in the crankcase 10 reaches a certain level.

[0035] It is understood that the hydrogen engine includes a gas intake passage, an oil return passage, and a crankcase intake passage, and the crankcase intake passage is not interconnected with the gas intake passage and the oil return passage within the cylinder head and cylinder head cover. The first chamber 20 can be understood as the crankcase intake passage forming a cavity inside the cylinder head 003, and it is connected to the crankcase 10, allowing the gas mixture in the crankcase 10 to enter the first chamber 20. The second chamber 30 can be understood as the crankcase intake passage forming a cavity inside the cylinder head cover 004. The isolation between the first chamber 20 and the second chamber 30 means that, without external connections, they are not interconnected; therefore, without external connections, the gas mixture in the first chamber 20 cannot enter the second chamber 30.

[0036] The separation system 50 includes a first hydrogen storage device 51 and a separation unit 52. The first hydrogen storage device 51 is used to store hydrogen gas, and the separation unit 52 is used to separate hydrogen gas. In an optional embodiment, the separation unit 52 includes a hydrogen separation device 521, a third chamber 522, and a fourth chamber 523, with the third chamber 522 and the fourth chamber 523 isolated by the hydrogen separation device 521. The fourth chamber 523 is connected to a first inlet pipe of the first hydrogen storage device 51. In an optional embodiment, the hydrogen separation device 521 includes a hydrogen separation membrane.

[0037] The third chamber 522 is connected to the first chamber 20 and the second chamber 30 via pipes. The mixed gas in the first chamber 20 can enter the third chamber 522, allowing the hydrogen in the mixed gas to pass through the hydrogen separator 521 and enter the fourth chamber 523. Since the fourth chamber 523 is connected to the first inlet of the first hydrogen storage device 51, the hydrogen separated in the fourth chamber 523 can enter the first hydrogen storage device 51 for storage. In addition, since the third chamber 522 is also connected to the second chamber 30 via pipes, the mixed gas in the third chamber 522 that has undergone hydrogen separation by the hydrogen separator 521 enters the second chamber 30.

[0038] The crankcase ventilation system 40 is the crankcase ventilation system of the hydrogen engine. The crankcase ventilation system 40 is connected to the second chamber 30 via piping and is used for oil-gas separation of the gas mixture in the second chamber 30. In an optional embodiment, reference continues to... Figure 1 As shown, the bypass system 40 includes an oil-gas separator 41, and the hydrogen engine 01 also includes a second electric pump 80. The inlet of the oil-gas separator 41 is connected to the second chamber 30, the outlet of the oil-gas separator 41 is connected to the third suction port pipe of the second electric pump 80, and the second discharge port of the second electric pump 80 is connected to the intake system 70 pipe. The oil-gas separator 41 is used to separate oil and gas in the mixed gas. The second electric pump 80 is used to pump the mixed gas in the second chamber 30 to the intake system 70 after the oil and gas are separated by the oil-gas separator 41. This allows the mixed gas (which contains only a small amount or no hydrogen) that has passed through the oil-gas separator to continue to be supplied as fresh air to the combustion chamber through the intake system 70 and to continue to participate in combustion.

[0039] In this embodiment, the hydrogen engine includes a crankcase, a first chamber, a second chamber, a duct system, and a separation system. The first chamber is connected to the crankcase, allowing the mixed gas that enters the crankcase during hydrogen combustion to enter the first chamber. The first chamber and the second chamber are isolated from each other. The third chamber of the separation unit in the separation system is connected to the pipes of the first chamber and the second chamber, respectively. The fourth chamber is connected to the first inlet pipe of the first hydrogen storage device. The separation unit is used to separate hydrogen. The second chamber is connected to the duct system, which is used to separate the oil and gas in the mixed gas in the second chamber. This allows the mixed gas in the first chamber to have hydrogen separated by the separation unit before entering the second chamber. The duct system then performs oil and gas separation on the mixed gas in the second chamber. This enables the hydrogen engine to achieve hydrogen separation in the mixed gas, and the separated hydrogen is processed separately to avoid the risk of explosion. At the same time, it prevents unburned hydrogen from entering the intake manifold and affecting the air-fuel ratio of the engine, thereby improving the operational stability of the hydrogen engine.

[0040] Optional, continue to refer to Figure 1As shown, the separation system 50 also includes a first electric pump 53; the first electric pump 53 includes a first suction port and a first discharge port; the first suction port is pipe-connected to the first cavity 20; the first discharge port is connected to the third cavity 522.

[0041] The first electric pump 53 can be, but is not limited to, a gear pump or a centrifugal pump. In this embodiment, the type of the first electric pump 53 is not specifically limited, as long as it can pump the mixed gas in the first chamber 20 into the third chamber 522.

[0042] Specifically, by connecting the first suction port of the first electric pump 53 to the first chamber 20 and the first discharge port of the first electric pump 53 to the third chamber 522, the mixed gas in the crankcase 10 can be drawn into the third chamber 522. At the same time, the pressure in the third chamber 522 is made greater than the pressure in the fourth chamber 523 and the second chamber 30, so that the hydrogen in the mixed gas can pass through the hydrogen separation device 521 into the fourth chamber 523 to achieve hydrogen separation. The mixed gas that cannot pass through the hydrogen separation device 521 (containing only a small amount or no hydrogen) enters the second chamber 30 and then continues to participate in combustion after passing through the crankcase system 40.

[0043] Optional, continue to refer to Figure 1 As shown, the third chamber 522 includes a first sub-chamber 5221 and a second sub-chamber 5222; the first sub-chamber 5221 is connected to the first chamber 20 via a pipe; the second sub-chamber 5222 is connected to the second chamber 30 via a pipe; a hydrogen separation device 521 is disposed between the first sub-chamber 5221 and the fourth chamber 523; a first one-way valve 5223 is disposed between the first sub-chamber 5221 and the second sub-chamber 5222; the first one-way valve 5223 is used to control the flow of the mixed gas in the first sub-chamber 5221 to the second sub-chamber 5222.

[0044] The first check valve 5223 may include, but is not limited to, a straight-through check valve or a right-angle check valve, which can control the flow of mixed gas in the first sub-cavity 5221 to the second sub-cavity 5222, while the mixed gas in the second sub-cavity 5222 cannot flow back to the first sub-cavity 5221.

[0045] Optionally, the opening pressure of the first one-way valve 5223 is greater than the optimal hydrogen transmembrane pressure of the hydrogen separation device 521.

[0046] The opening pressure of the first check valve 5223 is the minimum upstream pressure required for the first check valve 5223, that is, the minimum pressure difference between the first sub-cavity 5221 and the second sub-cavity 5222 that makes the first check valve 5223 open. The optimal hydrogen transmembrane pressure of the hydrogen separation device 521 refers to the pressure difference between the first sub-cavity 5221 and the fourth cavity 523 when the hydrogen in the first sub-cavity 5221 passes through the hydrogen separation device 521 to the fourth cavity 523 at the maximum rate.

[0047] A first one-way valve 5223 is included between the first sub-cavity 5221 and the second sub-cavity 5222. The conduction direction of the first one-way valve 5223 is from the first sub-cavity 5221 to the second sub-cavity 5222. Since the opening pressure of the first one-way valve 5223 is greater than the optimal hydrogen transmembrane pressure of the hydrogen separation device 521, the mixed gas in the first sub-cavity 5221 preferentially passes through the hydrogen separation device 521 to separate hydrogen. Then, the mixed gas in the first sub-cavity 5221 enters the second sub-cavity 5222 through the first one-way valve 5223, which further reduces the hydrogen concentration in the mixed gas in the second sub-cavity 5222, which is beneficial to improving the efficiency of the separation unit 52.

[0048] Optionally, the first electric pump 53 further includes a second suction port; the second sub-cavity 5222 includes a first outlet 5222a and a second outlet 5222b; at least one first hydrogen sensor 54 is provided in the second sub-cavity 5222; the first hydrogen sensor 54 is used to monitor the hydrogen content in the second sub-cavity 5222; the first outlet 5222a is turned on when the hydrogen content in the second sub-cavity 5222 is greater than or equal to a preset value; the second outlet 5222b is turned on when the hydrogen content in the second sub-cavity 5222 is less than the preset value.

[0049] The first hydrogen sensor 54 may include, but is not limited to, an electrochemical hydrogen concentration sensor or a resistive single-cell sensor, as long as it can detect the concentration of hydrogen in the first hydrogen storage device 51. It should be noted that the presence of at least one first hydrogen sensor 54 in the second sub-cavity 5222 can be understood as the presence of one first hydrogen sensor 54 in the second sub-cavity 5222, or multiple first hydrogen sensors 54 in the second sub-cavity 5222. Figure 1This example only illustrates the case where one first hydrogen sensor 54 is provided in the second sub-cavity 5222, and does not limit the number of first hydrogen sensors 54 in the second sub-cavity 5222. When multiple first hydrogen sensors 54 are provided in the second sub-cavity 5222, the multiple first hydrogen sensors 54 are distributed as evenly as possible in the second sub-cavity 5222 to detect the hydrogen concentration at various locations in the second sub-cavity 5222. In this case, the hydrogen concentration in the second sub-cavity 5222 can be understood as the maximum value of the hydrogen concentration detected by each first hydrogen sensor 54, or it can be the average value of the hydrogen concentration detected by each first hydrogen sensor 54. This embodiment does not specifically limit this.

[0050] The preset value can be set according to the actual requirements for the concentration of fuel hydrogen. In an optional embodiment, the preset value is the minimum explosive limit concentration of hydrogen.

[0051] Specifically, when the hydrogen concentration detected by each of the first hydrogen sensors 54 is greater than or equal to a preset value, it indicates that the hydrogen content in the second sub-cavity 5222 is high. In this case, the first outlet 5222a can be opened, allowing the mixed gas in the second sub-cavity 5222 to enter the first electric pump 53 and then re-enter the hydrogen separator 521 for hydrogen separation. This prevents hydrogen from participating in combustion through the hydrogen engine's intake passage and affecting the air-fuel ratio of the hydrogen engine. Conversely, when the hydrogen concentration is less than the preset value, the mixed gas in the second sub-cavity 5222 can enter the second cavity 30 through the second outlet 5222b and then enter the bypass system 40 for oil-gas separation. This further improves the hydrogen separation effect.

[0052] Optionally, the separation unit 52 may also include a water-absorbing structure; the water-absorbing structure is used to separate water vapor from the mixed gas.

[0053] The water-absorbing structure can include, but is not limited to, water-absorbing materials such as water-absorbing resin or structures that utilize temperature differences to condense water vapor, as long as it can separate water vapor from the mixed gas.

[0054] Optionally, the separation unit 52 further includes a water vapor outlet and at least one water guide channel; the water vapor outlet is located at the bottom of the third cavity 522; the water guide channel is located on the inner wall of the third cavity 522; the water guide channels are interconnected, and at least one water guide channel is connected to the water vapor outlet.

[0055] The water guide channel can be understood as a groove disposed on the inner wall of the third cavity 522. The water guide channel, used to guide condensate to the water vapor outlet, can be, but is not limited to, a straight groove and / or a curved groove. At least one water guide channel means one or more water guide channels; when the separation unit 52 includes multiple water guide channels, the channels can be the same or different. It is understood that the more uniformly the water guide channels are distributed on the inner wall of the third cavity 522, the higher the efficiency of water vapor separation.

[0056] Specifically, when the hydrogen engine 01 is running, hydrogen and fresh air burn in the combustion chamber. Some of the high-temperature mixture in the combustion chamber will seep into the crankcase 10. Therefore, the temperature of the mixture pumped to the third chamber 522 by the first electric pump 53 is relatively high, while the temperature of the gas outside the separation unit 52 is relatively low. When the water vapor in the mixture encounters the cooler inner wall, it condenses. By setting a guide groove on the inner wall of the third chamber 522, and having at least one guide groove connected to the water vapor outlet 524, the water vapor condensed on the inner wall of the third chamber 522 can flow back to the water vapor outlet 524 through the guide groove, thereby achieving the separation of water vapor in the mixture. In this way, the water vapor generated by hydrogen combustion can be prevented from causing lubricating oil emulsification, which is beneficial to extending the service life of the lubricating oil and thus extending the maintenance cycle of the hydrogen engine.

[0057] Optional, continue to refer to Figure 1 As shown, the first hydrogen storage device 51 includes a hydrogen outlet, which is connected to the hydrogen supply system 60 via a pipeline, so that the hydrogen in the first hydrogen storage device 51 can be supplied to the combustion chamber 90 through the hydrogen supply system 60 to continue to be burned as fuel, thereby helping to save resources.

[0058] In an optional embodiment, the hydrogen outlet and the hydrogen supply system 60 are connected by a second one-way valve 57, which is directed from the hydrogen outlet to the hydrogen supply system 60, thereby preventing the hydrogen in the hydrogen supply system 60 from flowing back into the first hydrogen storage device 51.

[0059] In an alternative embodiment, continue to refer to Figure 1 As shown, at least one second hydrogen sensor 11 is provided in the crankcase 10. The second hydrogen sensor 11 is used to detect the hydrogen concentration in the crankcase 10. When the hydrogen concentration in the crankcase 10 is greater than or equal to the minimum explosive limit concentration of hydrogen, the power of the first electric pump 53 and the second electric pump is increased to prevent the hydrogen concentration in the crankcase 10 from being too high and posing an explosion risk. When the hydrogen concentration in the crankcase 10 is less than the minimum explosive limit concentration of hydrogen, the power of the electric pump is reduced, thereby saving energy while preventing the crankcase 10 from exploding.

[0060] Based on the same inventive concept, this embodiment also provides a vehicle. Figure 2This is a schematic diagram of the vehicle structure provided in an embodiment of the present invention, with reference to... Figure 2 As shown, the vehicle 100 provided in this embodiment includes at least the hydrogen engine 01 provided in any of the above embodiments.

[0061] Since the vehicle provided in the embodiments of the present invention includes the above-mentioned hydrogen engine, it can have the corresponding structure and features of the hydrogen engine provided in the embodiments of the present invention, and can achieve the beneficial effects of the hydrogen engine provided in the embodiments of the present invention. The similarities can be referred to the above description.

[0062] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A hydrogen engine characterized by, The application relates to a hydrogen storage system for a hydrogen engine, which comprises a crankcase (10), a first cavity (20), a second cavity (30), a crank passage system (40) and a separation system (50). The first cavity (20) is in communication with the crankcase (10), and the first cavity (20) is isolated from the second cavity (30). The crank passage system (40) is in pipeline connection with the second cavity (30), and the crank passage system (40) is used for separating oil and gas in the second cavity (30). The separation system (50) comprises a first hydrogen storage device (51) and a separation unit (52), the first hydrogen storage device (51) comprises a first inlet, the separation unit (52) comprises a hydrogen separation device (521), a third cavity (522) and a fourth cavity (523) which are isolated by the hydrogen separation device (521), the third cavity (522) is in pipeline connection with the first cavity (20) and the second cavity (30) respectively, the fourth cavity (523) is in pipeline connection with the first inlet of the first hydrogen storage device (51), and the separation unit (52) is used for separating at least hydrogen. The third cavity (522) comprises a first sub-cavity (5221) and a second sub-cavity (5222). The first sub-cavity (5221) is in pipeline connection with the first cavity (20), the second sub-cavity (5222) is in pipeline connection with the second cavity (30), and the hydrogen separation device (521) is arranged between the first sub-cavity (5221) and the fourth cavity (523). A first one-way valve (5223) is arranged between the first sub-cavity (5221) and the second sub-cavity (5222), and the first one-way valve (5223) is used for controlling the flow direction of mixed gas in the first sub-cavity (5221) to the second sub-cavity (5222). The opening pressure of the first one-way valve (5223) is greater than the optimal hydrogen transmembrane pressure of the hydrogen separation device (521). The separation system (50) further comprises a first electric pump (53).

2. The hydrogen engine of claim 1, wherein The first electric pump (53) comprises a first suction inlet and a first discharge outlet, the first suction inlet is in pipeline connection with the first cavity (20), and the first discharge outlet is connected with the third cavity (522). The first electric pump (53) further comprises a second suction inlet, the second sub-cavity (5222) comprises a first outlet (5222a) and a second outlet (5222b).

3. The hydrogen engine of claim 2, wherein, At least one first hydrogen sensor (54) is arranged in the second sub-cavity (5222), and the first hydrogen sensor (54) is used for monitoring the hydrogen content in the second sub-cavity (5222). The first outlet (5222a) is turned on when the hydrogen content in the second sub-cavity (5222) is greater than or equal to a preset value, and the second outlet (5222b) is turned on when the hydrogen content in the second sub-cavity (5222) is less than the preset value. The separation unit (52) further comprises a water absorption structure, and the water absorption structure is used for separating water vapor in the mixed gas.

4. The hydrogen engine of claim 1, wherein, The application further relates to a hydrogen engine.

5. The hydrogen engine of claim 2, wherein, ​ A hydrogen supply system (60); The first hydrogen storage device (51) comprises a hydrogen outlet; the hydrogen outlet is connected to the hydrogen supply system (60) in a pipeline manner.

6. The hydrogen engine of claim 2, wherein, Further comprising: An air intake system (70) and a second electric pump (80); The second electric pump (80) comprises a third suction inlet and a second discharge outlet; the third suction inlet is connected to the curve system (40) in a pipeline manner; and the second discharge outlet is connected to the air intake system (70) in a pipeline manner.

7. The hydrogen engine of claim 6, wherein, At least one second hydrogen sensor (11) is arranged in the crankcase (10); the second hydrogen sensor (11) is used to detect the hydrogen concentration in the crankcase (10).

8. A vehicle characterized by comprising: At least comprising the hydrogen engine according to any one of claims 1-7.

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