Oil-gas separator, hydrogen engine and vehicle

Abstract

The invention discloses an oil-gas separator, a hydrogen engine and a vehicle. An oil-gas separation module of the oil-gas separator comprises an oil-gas separation unit, a first separator inlet, a first separator outlet and a second separator inlet; the first separator inlet is used for introducing mixed gas; the oil-gas separation module is used for separating oil gas in the mixed gas; the hydrogen separation module of the oil-gas separator comprises a cavity and a hydrogen separation unit; the hydrogen separation unit divides the cavity into a first cavity and a second cavity; the first cavity comprises a third separator inlet and a second separator outlet; the second cavity comprises a hydrogen outlet; an outlet of the first separator is connected with an inlet pipeline of the third separator; the second separator outlet is connected with the second separator inlet through a pipeline; the hydrogen outlet is used for being connected with a hydrogen supply channel of a hydrogen engine; and the hydrogen separation module is used for separating hydrogen in the mixed gas. According to the technical scheme, hydrogen separation of mixed gas is achieved, and hydrogen is prevented from entering the intake manifold.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle control, and in particular to an oil-gas separator, a hydrogen engine and a vehicle. Background Art

[0002] The oil-gas separator in the prior art is only provided with a flow control module, a coarse separator module and a fine separation module, which can achieve a good separation effect on the oil-gas mixed gas in the engine crankcase.

[0003] However, for hydrogen engines, when hydrogen burns, incompletely burned hydrogen will leak into the crankcase. Since the existing oil-gas separator cannot separate the hydrogen from the mixed gas, when the hydrogen in the crankcase reaches a certain concentration, there will be a risk of explosion, which will seriously affect the safety of the hydrogen engine.

[0004] To solve the above problems, active ventilation and active air replenishment are currently used to dilute the unburned hydrogen in the crankcase, thereby reducing the concentration of hydrogen in the crankcase. However, active ventilation and active air replenishment require the installation of an electric pump, and due to the large amount of ventilation or air replenishment, the electric pump is huge and may not be implemented in actual applications. In addition, the active ventilation solution will cause the hydrogen-containing mixed gas in the crankcase to enter the intake manifold again, resulting in the inability to accurately control the unburned hydrogen concentration and hydrogen ratio, thereby affecting the preset air-fuel ratio of the engine and affecting the normal operation of the engine. Summary of the invention

[0005] The present invention provides an oil-gas separator, a hydrogen engine and a vehicle to solve the problems existing in the prior art, realize hydrogen separation of mixed gas, 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.

[0006] In a first aspect, the present invention provides an oil-gas separator, comprising: an oil-gas separation module and a hydrogen separation module;

[0007] The oil-gas separation module comprises an oil-gas separation unit, a first separator inlet, a first separator outlet and a second separator inlet; the first separator inlet is used to introduce the mixed gas; the oil-gas separation module is used to separate the oil and gas in the mixed gas;

[0008] The hydrogen separation module includes a cavity and a hydrogen separation unit; the hydrogen separation unit divides the cavity into a first cavity and a second cavity; the first cavity includes a third separator inlet and a second separator outlet; the second cavity includes a hydrogen outlet; the first separator outlet is connected to the third separator inlet pipeline; the second separator outlet is connected to the second separator inlet pipeline; the hydrogen outlet is used to be connected to the hydrogen supply passage of the hydrogen engine; the hydrogen separation module is used to separate hydrogen from the mixed gas.

[0009] In a second aspect, the present invention further provides a hydrogen engine, comprising: an engine body, an air intake passage, a hydrogen supply passage, and an oil-gas separator as described in any one of the above;

[0010] The engine body includes a combustion chamber formed by connecting a cylinder block, a piston and a cylinder head; a crankcase is formed between the cylinder block and the piston; the intake passage and the hydrogen supply passage are connected to the combustion chamber pipeline; the intake passage is used to provide air to the engine body; the hydrogen supply passage is used to provide hydrogen to the engine body;

[0011] The engine body also includes a cylinder head cover; the cylinder head cover is located on the side of the cylinder head away from the piston; a gas channel exists between the crankcase, the cylinder head and the cylinder head cover; the first separator inlet of the oil-gas separator is connected to the gas channel pipeline; the oil-gas separator is used to separate the air, oil, gas and hydrogen in the mixed gas in the crankcase.

[0012] In a third aspect, the present invention provides a vehicle comprising at least any one of the hydrogen engines described above.

[0013] The technical solution of the present invention is that the oil-gas separator includes an oil-gas separation module and a hydrogen separation module, the oil-gas separation module includes an oil-gas separation unit, a first separator inlet, a first separator outlet and a second separator inlet, the first separator inlet is used to pass the mixed gas, and the oil-gas separation module is used to separate the oil and gas in the mixed gas; the hydrogen separation module includes a cavity and a hydrogen separation unit, the hydrogen separation unit divides the cavity into a first cavity and a second cavity, the first cavity includes a third separator inlet and a second separator outlet, the second cavity includes a hydrogen outlet, the first separator outlet is connected to the third separator inlet pipeline, the second separator outlet is connected to the second separator inlet pipeline, the hydrogen outlet is used to be connected to the hydrogen supply passage of the hydrogen engine, and the hydrogen separation unit is used to separate the hydrogen in the mixed gas, so that the oil-gas separator can separate the oil and hydrogen in the mixed gas, and the separated hydrogen can return to the hydrogen supply passage, thereby realizing the hydrogen separation of the mixed gas, avoiding the risk of explosion, and at the same time, preventing unburned hydrogen from entering the intake manifold and affecting the air-fuel ratio of the engine.

[0014] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 A schematic structural diagram of an oil-gas separator provided in an embodiment of the present invention;

[0017] Figure 2 A schematic diagram of the structure of a hydrogen engine provided by an embodiment of the present invention;

[0018] Figure 3 A schematic structural diagram of a vehicle provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0020] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein.

[0021] Figure 1 This is a schematic diagram of the structure of an oil-gas separator provided in an embodiment of the present invention. This embodiment provides an oil-gas separator, referring to Figure 1As shown, the oil-gas separator 01 includes: an oil-gas separation module 10 and a hydrogen separation module 20; the oil-gas separation module 10 includes an oil-gas separation unit 11, a first separator inlet 12, a first separator outlet 13 and a second separator inlet 14; the first separator inlet 12 is used to pass the mixed gas; the oil-gas separation module 10 is used to separate the oil and gas in the mixed gas. The hydrogen separation module 20 includes a cavity 21 and a hydrogen separation unit 22; the hydrogen separation unit 22 divides the cavity 21 into a first cavity 211 and a second cavity 212; the first cavity 211 includes a third separator inlet 2111 and a second separator outlet 2112; the second cavity 212 includes a hydrogen outlet 2121; the first separator outlet 13 is connected to the third separator inlet 2111 by a pipeline; the second separator outlet 2112 is connected to the second separator inlet 14 by a pipeline; the hydrogen outlet 2121 is used to connect to the hydrogen supply passage of the hydrogen engine; the hydrogen separation module is used to separate the hydrogen in the mixed gas.

[0022] Among them, the oil-gas separation unit 11 is used to separate the oil and gas in the mixed gas. The present embodiment does not limit the specific structure of the oil-gas separation unit 11, and it is sufficient to realize the core invention of the present embodiment. In an optional embodiment, the oil-gas separation unit 11 includes a primary separation device. In other optional embodiments, the oil-gas separation unit 11 includes a two-stage separation device, such as a coarse separation device and a fine separation device. The coarse separation device is used to perform coarse separation on the mixed gas, and the fine separation device is used to perform fine separation on the mixed gas; illustratively, the coarse separation device adopts a baffle structure, and the fine separation device adopts a felt structure, so as to have a higher oil-gas separation efficiency for oil and gas particles in a larger particle diameter range, and the oil-gas separation unit 11 has a small pressure loss.

[0023] The hydrogen separation unit 22 is used to separate hydrogen from the mixed gas. The present embodiment does not limit the specific structure of the hydrogen separation unit 22, and it is sufficient that the core invention of the present embodiment can be achieved. In an optional embodiment, the hydrogen separation unit 22 includes a hydrogen separation membrane. In other embodiments, the hydrogen separation unit 22 may also include a pressure swing adsorbent.

[0024] Specifically, the mixed gas in the crankcase of the hydrogen engine enters the oil-gas separation module 10 through the first separator inlet 12. After the oil and gas are separated by the oil-gas separation module 10, the mixed gas flows to the third separator inlet 2111 through the first separator outlet 13, and then enters the first cavity 211. Since the mixed gas continuously enters the first cavity 211, the pressure of the first cavity 211 is greater than the pressure of the second cavity 212, so that the hydrogen in the mixed gas in the first cavity 211 passes through the hydrogen separation unit 22 and enters the second cavity 212, so that the hydrogen in the mixed gas is separated from the mixed gas, and then flows to the hydrogen supply passage of the hydrogen engine through the hydrogen outlet 2121. In addition, since the second separator outlet 2112 of the first cavity 211 is connected to the second separator inlet 14 through a pipeline, and the pressure of the first cavity 211 is greater than the pressure of the oil-gas separation unit 11, the remaining mixed gas in the first cavity 211 enters the oil-gas separation unit 11 through the second separator outlet 2112 and the second separator inlet, thereby further performing oil-gas separation and hydrogen separation.

[0025] In an optional embodiment, a one-way valve 131 is provided at the first separator outlet 13 or the third separator inlet 2111 , and the conducting direction of the one-way valve 131 is from the first separator outlet 13 to the third separator inlet 2111 to ensure that the mixed gas in the first cavity 211 does not flow back to the oil-gas separation unit 11 .

[0026] In this embodiment, the oil-gas separator includes an oil-gas separation module and a hydrogen separation module, the oil-gas separation module includes an oil-gas separation unit, a first separator inlet, a first separator outlet and a second separator inlet, the first separator inlet is used to pass the mixed gas, and the oil-gas separation module is used to separate the oil and gas in the mixed gas; the hydrogen separation module includes a cavity and a hydrogen separation unit, the hydrogen separation unit divides the cavity into a first cavity and a second cavity, the first cavity includes a third separator inlet and a second separator outlet, the second cavity includes a hydrogen outlet, the first separator outlet is connected to the third separator inlet pipeline, the second separator outlet is connected to the second separator inlet pipeline, the hydrogen outlet is used to be connected to the hydrogen supply passage of the hydrogen engine, and the hydrogen separation unit is used to separate the hydrogen in the mixed gas, so that the oil-gas separator can separate the oil and hydrogen in the mixed gas, and the separated hydrogen can return to the hydrogen supply passage, thereby realizing the hydrogen separation of the mixed gas to avoid the risk of explosion, and at the same time, it can prevent unburned hydrogen from entering the intake manifold and affecting the air-fuel ratio of the engine.

[0027] Optional, continue to refer to Figure 1As shown, the first chamber 211 includes a first sub-chamber 2113 and a second sub-chamber 2114; the first sub-chamber 2113 includes a third separator inlet 2111; the second sub-chamber 2114 includes a second separator outlet 2112; the hydrogen separation unit 22 is disposed between the first sub-chamber 2113 and the second chamber 212. A first check valve 2115 is included between the first sub-chamber 2113 and the second sub-chamber 2114; the first check valve 2115 is used to control the mixed gas in the first sub-chamber 2113 to flow to the second sub-chamber 2114; the opening pressure of the first check valve 2115 is greater than the optimal hydrogen transmembrane pressure of the hydrogen separation unit 22.

[0028] The opening pressure of the first one-way valve 2115 is the minimum upstream pressure required by the first one-way valve 2115, that is, the minimum pressure difference between the first sub-chamber 2113 and the second sub-chamber 2114 that causes the first one-way valve 2115 to be turned on. The optimal hydrogen transmembrane pressure of the hydrogen separation unit 22 refers to the pressure difference between the first sub-chamber 2113 and the second chamber 212 when the hydrogen in the first sub-chamber 2113 passes through the hydrogen separation unit to the second chamber 212 at the maximum rate.

[0029] A first one-way valve 2115 is included between the first sub-chamber 2113 and the second sub-chamber 2114. The conduction direction of the first one-way valve 2115 is from the first sub-chamber 2113 to the second sub-chamber 2114. Since the opening pressure of the first one-way valve 2115 is greater than the optimal hydrogen transmembrane pressure of the hydrogen separation unit 22, the mixed gas in the first sub-chamber 2113 is preferentially separated from the hydrogen by the hydrogen separation unit 22, and then the mixed gas in the first sub-chamber 2113 enters the second sub-chamber 2114 through the first one-way valve 2115, so that the hydrogen concentration in the mixed gas in the second sub-chamber 2114 is further reduced, thereby reducing the load of the oil-gas separation unit and the hydrogen separation unit 22 and improving the efficiency of the oil-gas separator.

[0030] Optional, continue to refer to Figure 1 As shown, the second separator outlet 2112 includes a first sub-outlet 2112a and a second sub-outlet 2112b; the first sub-outlet 2112a is connected to the second separator inlet 14 pipeline; the second sub-outlet 2112b is used to connect to the intake passage of the hydrogen engine; the first sub-outlet 2112a and the second sub-outlet 2112b are opened at different times.

[0031] Among them, the first sub-outlet 2112a is connected to the second separator inlet 14 by a pipeline, and the second sub-outlet 2112b is used to connect to the intake passage of the hydrogen engine. The first sub-outlet 2112a and the second sub-outlet 2112b are connected at different times, so that the first sub-outlet 2112a and the second sub-outlet 2112b can be connected according to the concentration of hydrogen in the second sub-cavity 2114. When the hydrogen concentration is large, the mixed gas in the second sub-cavity 2114 enters the oil-gas separation unit 11 through the first sub-outlet 2112a and the second separator inlet 14 successively to further reduce the concentration of hydrogen in the mixed gas. When the hydrogen concentration is small, the mixed gas in the second sub-cavity 2114 can enter the intake passage of the hydrogen engine through the second sub-outlet 2112b without affecting the air-fuel ratio of the hydrogen engine.

[0032] Optional, continue to refer to Figure 1 As shown, at least one first hydrogen sensor 2116 is disposed in the second sub-cavity 2114; the first sub-outlet 2112a is turned on when the hydrogen concentration in the second sub-cavity 2114 is greater than or equal to a preset value; the second sub-outlet 2112b is turned on when the hydrogen concentration in the second sub-cavity 2114 is less than the preset value.

[0033] The first hydrogen sensor 2116 may include but is not limited to an electrochemical hydrogen concentration sensor or a resistive single body sensor, etc., as long as it can detect the concentration of hydrogen in the second sub-cavity 2114. It should be noted that the second sub-cavity 2114 is provided with at least one first hydrogen sensor 2116, which can be understood as the second sub-cavity 2114 is provided with one first hydrogen sensor 2116, or the second sub-cavity 2114 is provided with multiple first hydrogen sensors 2116; Figure 1 Only the case where one first hydrogen sensor 2116 is provided in the second sub-cavity 2114 is exemplarily shown, and the number of the first hydrogen sensors 2116 in the second sub-cavity 2114 is not limited. When a plurality of first hydrogen sensors 2116 are provided in the second sub-cavity 2114, the plurality of first hydrogen sensors 2116 are distributed as evenly as possible in the second sub-cavity 2114 to detect the hydrogen concentration at each position in the second sub-cavity 2114. At this time, the hydrogen concentration in the second sub-cavity 2114 can be understood as the maximum value of the hydrogen concentrations detected by the first hydrogen sensors 2116, or the average value of the hydrogen concentrations detected by the first hydrogen sensors 2116, which is not specifically limited in this embodiment.

[0034] The preset value can be set according to actual needs. In an optional embodiment, the preset value is the minimum explosion limit concentration of hydrogen.

[0035] Specifically, when the hydrogen concentration detected by each first hydrogen sensor 2116 is greater than or equal to a preset value, the first sub-outlet 2112a is turned on, so that the mixed gas in the second sub-cavity 2114 enters the oil-gas separation unit 11 through the first sub-outlet 2112a and the second separator inlet 14 successively, so as to further reduce the concentration of hydrogen in the mixed gas. When the hydrogen concentration is less than the preset value, the mixed gas in the second sub-cavity 2114 can enter the intake passage of the hydrogen engine through the second sub-outlet 2112b without affecting the air-fuel ratio of the hydrogen engine.

[0036] Optional, continue to refer to Figure 1 As shown, the oil-gas separation unit 11 includes a rough separation unit 111 and a fine separation unit 112; the rough separation unit 111 includes a rough separation device 1111 and a first separator inlet 12; the fine separation unit 112 includes a fine separation device 1121 and a first separator outlet 13; the rough separation unit 111 and the fine separation unit 112 are connected via a second one-way valve 113; the second one-way valve 113 is used to control the mixed gas in the rough separation unit 111 to flow to the fine separation unit 112.

[0037] Among them, the rough separation unit 111 includes a rough separation device 1111, and the fine separation unit 112 includes a fine separation device 1121. The rough separation device 1111 is used to roughly separate the oil and gas in the mixed gas, and the fine separation device 1121 is used to finely separate the oil and gas in the mixed gas; exemplarily, the rough separation device 1111 includes a baffle structure to separate the oil and gas particles with larger sizes, and the fine separation device 1121 includes a felt structure to separate the oil and gas particles with smaller sizes in the mixed gas. In this way, since the first separator inlet 12 is used to connect with the crankcase of the hydrogen engine, the mixed gas in the crankcase first enters the rough separation device 1111 through the first separator inlet 12 for rough separation, thereby improving the separation efficiency. The mixed gas after rough separation then enters the fine separation device 1121 through the second one-way valve 113, thereby reducing the pressure loss of the oil and gas separation unit 11.

[0038] In an alternative embodiment, continue to refer to Figure 1 As shown, the coarse separation unit 111 and the fine separation unit 112 both include an oil return device 1112 and 1122, so that the oil and gas separated by the coarse separation device 1111 and the oil and gas separated by the fine separation device 1121 can be collected in the corresponding oil return devices 1112 and 1122, so that the oil and gas in the mixed gas can be continuously reused, thereby reducing the frequency of adding and replacing lubricating oil, improving the convenience of the hydrogen engine, and reducing the cost of use.

[0039] Based on the same inventive concept, this embodiment also provides a hydrogen engine. Figure 2The schematic diagram of the structure of the hydrogen engine provided by the embodiment of the present invention is shown in FIG. Figure 2 As shown, the hydrogen engine provided in this embodiment includes an engine body 02, an intake passage 03, a hydrogen supply passage 04 and an oil-gas separator 01 provided in any of the above embodiments; the engine body 02 includes a combustion chamber 024 formed by connecting a cylinder body 021, a piston 022 and a cylinder head 023; a crankcase 025 is formed between the cylinder body 021 and the piston 022; the intake passage 03 and the hydrogen supply passage 04 are connected to the combustion chamber 024 pipeline; the intake passage 03 is used to provide the engine body 02 with Air; the hydrogen supply passage 04 is used to provide hydrogen to the engine body 02; the engine body 02 also includes a cylinder head cover 026; the cylinder head cover 026 is located on the side of the cylinder head 023 away from the piston 022; there is a gas channel 027 between the crankcase 025, the cylinder head 023 and the cylinder head cover 026; the first separator inlet 12 of the oil-gas separator 01 is connected to the gas channel 027 pipeline; the oil-gas separator 01 is used to separate the oil and hydrogen in the mixed gas in the crankcase 025.

[0040] Among them, the cylinder body 021, piston 022 and cylinder head 023 of the engine body 02 are connected in sequence and sealed to form a combustion chamber 024, the intake passage 03 and the hydrogen supply passage 04 are connected to the combustion chamber 024 pipeline, the intake passage 03 is used to provide fresh air, and the hydrogen supply passage 04 is used to provide hydrogen, so that the hydrogen and fresh air are mixed in a certain proportion and ignited by the ignition system (not shown in the figure), and the mixed gas of air and hydrogen does work to maintain the normal operation of the engine.

[0041] A crankcase 025 is formed between the cylinder body 021 and the piston 022 . There is a gap between the combustion chamber 024 and the crankcase 025 . During the operation of the engine, part of the mixed gas will flow into the crankcase 025 .

[0042] In order to prevent the explosion caused by excessive hydrogen concentration in the crankcase 025, since there is a gas channel 027 between the crankcase 025, the cylinder head 023 and the cylinder head cover 026, the first separator inlet 12 of the oil-gas separator 01 is connected to the pipeline of the gas channel 027, so that the oil-gas separator 01 can separate the air, oil and hydrogen in the mixed gas in the crankcase 025. By separating the oil and hydrogen in the mixed gas in the crankcase 025 by the oil-gas separator 01, it is possible to prevent unburned hydrogen from entering the intake manifold and affecting the air-fuel ratio of the engine, thereby affecting the stable operation of the engine. At the same time, it is possible to avoid the explosion of the hydrogen engine, which is conducive to improving the safety performance of the hydrogen engine.

[0043] Optional, continue to refer to Figure 2As shown, the hydrogen engine further includes an electric pump 05 ; the suction port of the electric pump 05 is connected to the first separator outlet 13 of the oil-gas separator 01 through a pipeline; the discharge port of the electric pump 05 is connected to the third separator inlet 2111 of the oil-gas separator 01 through a pipeline.

[0044] Among them, the electric pump 05 can be but is not limited to a gear pump or a centrifugal pump, etc. This embodiment does not specifically limit the type of the electric pump 05, as long as it can achieve the mixed gas in the oil-gas separation unit 11 of the oil-gas separator 01 to be drawn into the first cavity 211 of the oil-gas separator 01.

[0045] Specifically, by connecting the suction port of the electric pump 05 to the first separator outlet 13 of the oil-gas separator 01 through a pipeline, and connecting the discharge port of the electric pump 05 to the third separator inlet 2111 of the oil-gas separator 01 through a pipeline, the mixed gas in the oil-gas separation unit 11 can enter the first cavity 211 of the hydrogen separation module 20 of the oil-gas separator 01 after the oil and gas are separated to separate the hydrogen from the mixed gas. At the same time, the pressure in the oil-gas separation unit 11 is lower than the pressure in the first cavity 211 of the hydrogen separation module 20, so that the mixed gas in the first cavity 211 can return to the oil-gas separation unit 11 when the first sub-outlet 2112a is turned on, so that the oil-gas separation unit 11 and the hydrogen separation module 20 can continue to separate the oil and hydrogen in the mixed gas.

[0046] In an optional embodiment, at least one second hydrogen sensor 028 is provided in the crankcase, and the second hydrogen sensor is used to detect the hydrogen concentration in the crankcase, so as to increase the power of the electric pump when the hydrogen concentration in the crankcase is greater than or equal to the minimum explosion limit concentration of hydrogen, and reduce the power of the electric pump when the hydrogen concentration in the crankcase is less than the minimum explosion limit concentration of hydrogen, thereby saving energy while preventing the crankcase from exploding.

[0047] Optional, continue to refer to Figure 2 As shown, the hydrogen outlet 2121 of the oil-gas separator 01 is connected to the hydrogen supply passage 04 through a pipeline, and the second sub-outlet 2112 b of the oil-gas separator 01 is connected to the intake passage 03 through a pipeline.

[0048] In this embodiment, by connecting the hydrogen outlet of the oil-gas separator to the hydrogen supply passage pipeline, the hydrogen separated by the oil-gas separator is provided to the combustion chamber through the hydrogen supply passage to continue to be burned as fuel, which is beneficial to saving resources. At the same time, since the second sub-outlet of the oil-gas separator is turned on when the hydrogen concentration in the second sub-cavity is less than a preset value, and the second sub-outlet is connected to the intake passage pipeline, the mixed gas containing a small amount or no hydrogen continues to be provided to the combustion chamber as fresh air through the intake passage, thereby not affecting the air-fuel ratio of the hydrogen engine, which is beneficial to improving the operating stability of the hydrogen engine.

[0049] In an alternative embodiment, continue to refer to Figure 2 As shown, the hydrogen supply passage 04 includes a hydrogen storage device 041 and an injection device 042; the hydrogen storage device 041 and the injection device 042 are connected by a pipeline; the injection device 042 is connected to the combustion chamber 024; the hydrogen outlet 2121 is connected to the hydrogen storage device 041 by a pipeline through a third one-way valve 043; when the third one-way valve 043 is turned on, hydrogen flows from the hydrogen outlet 2121 to the hydrogen storage device 041, so that the hydrogen separated by the oil-gas separator 01 is stored in the hydrogen storage device 041, so that the hydrogen in the hydrogen storage device 041 is quantitatively injected into the combustion chamber 024 according to the signal of the engine control system.

[0050] In an alternative embodiment, continue to refer to Figure 2 As shown, the intake passage 03 includes an air filter 031, a supercharger 032, an intercooler 033, a throttle valve 034 and an intake manifold 035; the air filter 031, the supercharger 032, the intercooler 033, the throttle valve 034 and the intake manifold 035 are connected in sequence by pipelines, and the intake manifold 035 is connected to the combustion chamber 024; the second sub-outlet 2112b is connected to the pipeline between the air filter 031 and the supercharger 032.

[0051] Based on the same inventive concept, this embodiment also provides a vehicle. Figure 3 A schematic diagram of the structure of a vehicle provided in an embodiment of the present invention, referring to Figure 3 As shown, the vehicle 0001 provided in this embodiment at least includes the hydrogen engine 001 provided in any of the above embodiments.

[0052] Since the vehicle 0001 provided in the embodiment of the present invention includes the above-mentioned hydrogen engine 001, it can have the corresponding structure and characteristics of the hydrogen engine 001 provided in the embodiment of the present invention, and can achieve the beneficial effects of the hydrogen engine 001 provided in the embodiment of the present invention. The similarities can be referred to the above description.

[0053] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An oil-gas separator, characterized in that: include: An oil-gas separation module (10) and a hydrogen separation module (20); The oil-gas separation module (10) comprises an oil-gas separation unit (11), a first separator inlet (12), a first separator outlet (13) and a second separator inlet (14); the first separator inlet (12) is used to introduce a mixed gas; the oil-gas separation module (10) is used to separate oil and gas from the mixed gas; The hydrogen separation module (20) comprises a cavity (21) and a hydrogen separation unit (22); the hydrogen separation unit (22) divides the cavity (21) into a first cavity (211) and a second cavity (212); the first cavity (211) comprises a third separator inlet (2111) and a second separator outlet (2112); the second cavity (212) comprises a hydrogen outlet (2121); the first separator outlet (13) is connected to the third separator inlet (2111) by a pipeline; the second separator outlet (2112) is connected to the second separator inlet (14) by a pipeline; the hydrogen outlet (2121) is used to be connected to a hydrogen supply passage of a hydrogen engine; the hydrogen separation module is used to separate hydrogen from a mixed gas.

2. The oil-gas separator according to claim 1, characterized in that: The first chamber (211) comprises a first sub-chamber (2113) and a second sub-chamber (2114); the first sub-chamber (2113) comprises a third separator inlet (2111); the second sub-chamber (2114) comprises a second separator outlet (2112); the hydrogen separation unit (22) is arranged between the first sub-chamber (2113) and the second chamber (212); a first one-way valve (2115) is included between the first sub-chamber (2113) and the second sub-chamber (2114); the first one-way valve (2115) is used to control the mixed gas in the first sub-chamber (2113) to flow to the second sub-chamber (2114); the opening pressure of the first one-way valve (2115) is greater than the opening pressure of the hydrogen separation unit (22).

3. The oil-gas separator according to claim 2, characterized in that: The second separator outlet (2112) comprises a first sub-outlet (2112a) and a second sub-outlet (2112b); the first sub-outlet (2112a) is connected to the second separator inlet (14) via a pipeline; the second sub-outlet (2112b) is used to be connected to an intake passage of a hydrogen engine; the first sub-outlet (2112a) and the second sub-outlet (2112b) are electrically connected at different times.

4. The oil-gas separator according to claim 3, characterized in that: At least one first hydrogen sensor (2116) is disposed in the second sub-cavity (2114); the first hydrogen sensor is used to monitor the concentration of hydrogen in the second sub-cavity (2114); The first sub-outlet (2112a) is opened when the hydrogen concentration in the second sub-cavity (2114) is greater than or equal to a preset value; the second sub-outlet (2112b) is opened when the hydrogen concentration in the second sub-cavity (2114) is less than the preset value.

5. The oil-gas separator according to claim 1, characterized in that: The oil-gas separation unit (11) comprises a rough separation unit (111) and a fine separation unit (112); the rough separation unit (111) comprises a rough separation device (1111) and the first separator inlet (12); the fine separation unit (112) comprises a fine separation device (1121) and the first separator outlet (13); the rough separation unit (111) and the fine separation unit (112) are connected via a second one-way valve (113); the second one-way valve (113) is used to control the mixed gas in the rough separation unit (111) to flow to the fine separation unit (112).

6. A hydrogen engine, characterized in that: include: An engine body (02), an air intake passage (03), a hydrogen supply passage (04), and an oil-gas separator (01) as claimed in any one of claims 1 to 5; The engine body (02) includes a combustion chamber (024) formed by connecting a cylinder body (021), a piston (022) and a cylinder head (023); a crankcase (025) is formed between the cylinder body (021) and the piston (022); the intake passage (03) and the hydrogen supply passage (04) are connected to the combustion chamber (024) by a pipeline; the intake passage (03) is used to provide air to the engine body (02); the hydrogen supply passage (04) is used to provide hydrogen to the engine body (02); The engine body (02) also includes a cylinder head cover (026); the cylinder head cover (026) is located on a side of the cylinder head (023) away from the piston (022); a gas channel (027) exists between the crankcase (025), the cylinder head (023) and the cylinder head cover (026); a first separator inlet (12) of the oil-gas separator (01) is connected to a pipeline of the gas channel (027); the oil-gas separator (01) is used to separate air, oil, gas and hydrogen from the mixed gas in the crankcase (025).

7. The hydrogen engine according to claim 6, characterized in that: Also includes: An electric pump (05); the suction port of the electric pump (05) is connected to the first separator outlet (13) pipeline of the oil-gas separator (01); the discharge port of the electric pump (05) is connected to the third separator inlet (2111) pipeline of the oil-gas separator (01).

8. The hydrogen engine according to claim 6, characterized in that: The hydrogen outlet (2121) of the oil-gas separator (01) is connected to the pipeline of the hydrogen supply passage (04); the second sub-outlet (2112b) of the oil-gas separator (01) is connected to the pipeline of the intake passage (03).

9. The hydrogen engine according to claim 8, characterized in that: The hydrogen supply passage (04) comprises a hydrogen storage device (041) and an injection device (042); the hydrogen storage device (041) and the injection device (042) are connected by a pipeline; the injection device (042) is connected to the combustion chamber (024); The hydrogen outlet (2121) is connected to the hydrogen storage device (041) via a third one-way valve (043) pipeline; when the third one-way valve (043) is turned on, hydrogen flows from the hydrogen outlet (2121) to the hydrogen storage device (041).

10. The hydrogen engine according to claim 8, characterized in that: The intake passage (03) comprises an air filter (031), a supercharger (032), an intercooler (033), a throttle valve (034) and an intake manifold (035); the air filter (031), the supercharger (032), the intercooler (033), the throttle valve (034) and the intake manifold (035) are connected in sequence by pipelines, and the intake manifold (035) is connected to the combustion chamber (024); The second sub-outlet (2112b) is connected to a pipeline between the air filter (031) and the supercharger (032).

11. A vehicle, characterized in that: At least comprising the hydrogen engine according to any one of claims 6-10.

Images