Oil-gas separator and vehicle

Abstract

The utility model discloses an oil-gas separator and a vehicle, the oil-gas separator comprises a shell, a separation cavity is formed in the shell, and the top wall of the shell is provided with a protruding part protruding in the direction away from the separation cavity; the first separating part is arranged in the separating cavity, and the air outlet end of the first separating part and at least part of the protruding part are correspondingly arranged in the first direction. According to the oil-gas separator provided by the embodiment of the invention, the oil-gas separator is provided with the lug boss, so that the oil-gas separation efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of vehicles, and in particular to an oil-gas separator and a vehicle. Background Technology

[0002] In related technologies, the oil-gas separator is a core component of the crankcase ventilation system. Before piston blow-by gases re-enter the combustion chamber for combustion, they need to be separated to ensure that the amount of oil carried away is minimized, thereby maintaining normal engine operation and extending service life. However, current oil-gas separators on the market generally suffer from simple structures and low separation efficiency. Traditional oil-gas separators often fail to fully meet the demands of modern engines for efficient and precise oil-gas separation, resulting in excessive oil carry-over, which affects engine performance and increases maintenance costs. Therefore, improving the design of oil-gas separators to enhance their oil-gas separation efficiency is a technical challenge. Utility Model Content

[0003] This application aims to at least solve one of the technical problems existing in the prior art. To this end, one object of this application is to provide an oil-gas separator that improves oil-gas separation efficiency by providing protrusions.

[0004] This application also proposes a vehicle having the aforementioned oil-gas separator.

[0005] An oil-gas separator according to an embodiment of this application includes: a housing having a separation chamber formed therein, the top wall of the housing having a protrusion protruding in a direction away from the separation chamber; and a first separator disposed in the separation chamber, wherein at least a portion of the gas outlet end of the first separator is correspondingly disposed with at least a portion of the protrusion along a first direction.

[0006] According to an embodiment of this application, the oil-gas separator has a housing and a first separating member. The top wall of the housing has a protrusion. The gas outlet of the first separating member is positioned directly opposite to at least a portion of the protrusion in a first direction, thereby making it easier for the gas separated by the first separating member to be discharged from the gas outlet. Furthermore, by providing the protrusion, the internal volume of the cavity can be increased, making the flow rate of the separated gas slower, which is beneficial to improving the oil-gas separation efficiency.

[0007] In some embodiments of this application, the protrusion includes a rising section and a descending section connected in sequence. Along a second direction, the rising section extends obliquely away from the separation cavity, and the descending section extends obliquely towards the separation cavity; wherein the second direction is orthogonal to the first direction.

[0008] In some embodiments of this application, the angle between the extension direction of the rising segment and the second direction is α and satisfies: 10°≤α≤20°.

[0009] In some embodiments of this application, the dimension of the rising segment along the second direction is d1, and the dimension of the falling segment along the second direction is d2, satisfying: 2≤d1 / d2≤3.

[0010] In some embodiments of this application, the first separating member is connected to the inner wall of the separating chamber at both ends along the first direction, and the first separating member is provided with an outlet on one side along the second direction. The outlet is formed with an air outlet at one end facing the protrusion, and an oil outlet at one end away from the protrusion.

[0011] In some embodiments of this application, the oil-gas separator further includes a first baffle and a second baffle, both of which are housed within the separation chamber and spaced apart. The first baffle is connected to the top wall of the housing and extends along the first direction, and the second baffle is connected to the bottom wall of the housing and extends along the first direction.

[0012] In some embodiments of this application, the distance between the first baffle and the adjacent second baffle along the second direction is L and satisfies: 15mm≤L≤25mm.

[0013] In some embodiments of this application, the housing includes a first bottom wall and a second bottom wall, the first bottom wall being connected to the first separator; the oil-gas separator further includes a second separator, the second separator being disposed on the second bottom wall and located upstream of the first separator; wherein, a first oil return port is provided between the first bottom wall and the second bottom wall, and along the first direction, the maximum distance between the first bottom wall and the second bottom wall is H and satisfies: 15mm≤H≤25mm.

[0014] In some embodiments of this application, the housing has a sidewall on one side along the second direction, and the top wall of the housing is provided with an air outlet; wherein, the distance between the axis of the air outlet and the sidewall is d and satisfies: 50mm≤d≤60mm.

[0015] The vehicle of the embodiment of this application is briefly described below.

[0016] The vehicle according to the embodiments of this application is equipped with an engine and the oil-gas separator of the above embodiments. The oil-gas separator can be installed on the cam bearing cover of the engine. Since the vehicle according to the embodiments of this application is equipped with an engine and the oil-gas separator of the above embodiments, the oil-gas separator of the vehicle has a housing and a first separating member. The top wall of the housing has a protrusion. The gas outlet end of the first separating member can be arranged directly opposite to at least a portion of the protrusion in a first direction, so that the gas separated by the first separating member can be more easily discharged from the gas outlet end. In addition, by providing the protrusion, the internal volume of the cavity can be increased, and the flow rate of the separated gas can be slowed down, which is beneficial to improving the oil-gas separation efficiency.

[0017] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic diagram of the structure of an oil-gas separator according to an embodiment of this application;

[0020] Figure 2 yes Figure 1 A magnified view of a portion of circle A in the center.

[0021] Figure label:

[0022] 10. Oil-gas separator;

[0023] 11. Shell; 111. Separation chamber; 112. Top wall; 113. Protrusion; 1131. Lifting section; 1132. Lowering section;

[0024] 114. First bottom wall; 115. Second bottom wall; 116. First oil return port;

[0025] 117. Air outlet; 118. Second oil return port;

[0026] 12. First separator; 121. Outlet section; 1211. Gas outlet; 1212. Oil outlet;

[0027] 13. First baffle; 14. Second baffle; 15. Second separator. Detailed Implementation

[0028] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0029] The following is for reference. Figures 1-2 The oil-gas separator 10 according to an embodiment of the present application is described. The oil-gas separator 10 includes a housing 11 and a first separator 12.

[0030] A separation cavity 111 is formed inside the housing 11, and the top wall 112 of the housing 11 has a protrusion 113 protruding in a direction away from the separation cavity 111. A first separation member 12 is disposed inside the separation cavity 111, and the air outlet 1211 of the first separation member 12 is disposed corresponding to at least a portion of the protrusion 113 along a first direction.

[0031] Currently, most oil-gas separators on the market suffer from simple structures and low separation efficiency. Traditional oil-gas separators often fail to fully meet the demands of modern engines for efficient and precise oil-gas separation, resulting in excessive oil carryover. This affects engine performance and increases maintenance costs. Therefore, improving the design of oil-gas separators to enhance their oil-gas separation efficiency is a technical challenge.

[0032] In response, this application proposes an oil-gas separator 10, which improves oil-gas separation efficiency by providing a protrusion 113.

[0033] like Figure 1 As shown, specifically, the oil-gas separator 10 may include a housing 11 and a first separating element 12. The housing 11 may have an air inlet, an air outlet 117 and an oil return port. The air inlet may be connected to the timing chamber of the engine, and the air outlet 117 may be connected to the intake system. A separating chamber 111 may be formed inside the housing 11. The separating chamber 111 may be connected to the air inlet, the air outlet 117 and the oil return port respectively. The oil-gas mixture in the timing chamber can enter the separating chamber 111 through the air inlet. After oil-gas separation in the separating chamber 111, the separated oil can flow back to the oil sump of the engine through the oil return port to lubricate the camshaft. The separated gas can flow to the intake system through the air outlet 117 and circulate.

[0034] Optionally, the housing 11 can be fixed to the camshaft bearing cap of the engine. The engine may include a cylinder head and a camshaft bearing cap. The cylinder head may be located above the cylinder block, and the cylinder head and the camshaft bearing cap may be connected by bolts. A closed chamber may be formed between the cylinder head and the camshaft bearing cap for mounting the engine camshaft. An oil sump may also be formed between the cylinder head and the camshaft bearing cap. The oil sump may be used to store engine oil and may be connected to the cylinder block for lubrication and heat dissipation. The camshaft may be partially or entirely located in the oil sump. The oil separator 10 may be located at the camshaft bearing cap to facilitate communication with the timing chamber and the oil sump.

[0035] Furthermore, the top wall 112 of the housing 11 has a protrusion 113, which can protrude in a direction away from the separation chamber 111. It should be noted that the protrusion 113 can be part of the top wall 112. The protrusion 113 can increase the volume of the separation chamber 111. The first separator 12 can be disposed in the separation chamber 111, and the gas outlet 1211 of the first separator 12 can be directly opposite to at least a portion of the protrusion 113 in a first direction. It can be understood that the protrusion 113 can increase the volume of the chamber downstream of the first separator 12. In some embodiments, the first separator 12 can be configured for fine separation. Therefore, the protrusion 113 can make it easier for the gas separated by the first separator 12 to be discharged, thereby increasing the volume of the separated chamber, reducing the gas flow rate after separation, and improving the oil-gas separation efficiency.

[0036] In short, the oil-gas separator 10 of this application embodiment has a housing 11 and a first separator 12. The top wall 112 of the housing 11 has a protrusion 113. The gas outlet 1211 of the first separator 12 can be arranged directly opposite to at least a portion of the protrusion 113 in a first direction, so that the gas separated by the first separator 12 can be more easily discharged from the gas outlet 1211. Furthermore, by providing the protrusion 113, the internal volume of the cavity can be increased, and the flow rate of the separated gas can be slowed down, which is beneficial to improving the oil-gas separation efficiency.

[0037] like Figure 1 and Figure 2As shown, in some embodiments of this application, the two ends of the first separating member 12 along the first direction can be connected to the inner wall of the separating cavity 111 respectively. Optionally, the inner wall of the separating cavity 111 can be provided with a first snap-fit ​​portion, and the two ends of the first separating member 12 along the first direction can be provided with a second snap-fit ​​portion. The second snap-fit ​​portion can engage with the first snap-fit ​​portion to fix the first separating member 12. The first separator 12 may have an outlet 121 on one side along the second direction, wherein the second direction may be orthogonal to the first direction. The outlet 121 may be used to discharge the separated oil and gas. Further, the end of the outlet 121 facing the protrusion 113 may have an air outlet 1211 and the end of the outlet 121 away from the protrusion 113 may have an oil outlet 1212. This ensures that the air outlet 1211 can face the top wall 112 of the housing 11 and the oil outlet 1212 can face the bottom wall of the housing 11. The separated oil can flow along the bottom wall of the housing 11 to the oil return port and into the oil pool. The separated gas can be discharged to the protrusion 113 through the air outlet 1211, and the gas flow rate will be slowed down, improving the oil-gas separation effect. Therefore, by providing the air outlet 1211 and the oil outlet 1212 on the outlet 121, it can be ensured that the separated oil and gas will not be remixed, thus ensuring the separation efficiency of the oil-gas separator 10.

[0038] like Figure 1 and Figure 2 As shown, in some embodiments of this application, the oil-gas separator 10 may further include a first baffle 13 and a second baffle 14. The first baffle 13 and the second baffle 14 may both be housed in the separation chamber 111, and the first baffle 13 and the second baffle 14 may be spaced apart along a second direction. The first baffle 13 may be connected to the top wall 112 of the housing 11, and the free end of the first baffle 13 may extend toward the bottom wall of the housing 11 along a first direction. The second baffle 14 may be connected to the bottom wall of the housing 11, and the free end of the second baffle 14 may extend toward the top wall 112 of the housing 11 along a first direction.

[0039] Furthermore, the first baffle 13 and the second baffle 14 can achieve secondary separation of the oil-gas mixture. It can be understood that after the oil-gas mixture is separated by the first separator 12, the separated gas is discharged through the gas outlet 1211 and guided to the first baffle 13. When the gas comes into contact with the first baffle 13, the oil in the gas can adhere to the surface of the first baffle 13, and the gas continues to flow along the first baffle 13. Similarly, the gas flowing along the first baffle 13 can come into contact with the second baffle 14, and the oil in the gas can adhere to the second baffle 14 again, and the gas flows along the second baffle 14. The oil adhering to the first baffle 13 and the second baffle 14 can flow to the bottom wall of the housing 11 under the influence of gravity, and flow along the bottom wall to the oil return port. Therefore, by setting the first baffle 13 and the second baffle 14, it is beneficial to the secondary separation of oil and gas, thereby achieving efficient separation of the oil-gas separator 10.

[0040] In some embodiments of this application, there can be multiple first baffles 13 and multiple second baffles 14. Multiple first baffles 13 and multiple second baffles 14 can be arranged alternately along the second direction. This arrangement can increase the gas flow distance, thereby more effectively separating oil and gas, improving oil and gas separation efficiency, and facilitating the further settling of tiny oil particles. In actual arrangement, the number of first baffles 13 and second baffles 14 can be set according to the internal space. In specific embodiments, the total number of first baffles 13 and second baffles 14 can be 3 to 4.

[0041] like Figure 2 As shown in some embodiments of this application, the distance between one of the first baffles 13 and the adjacent second baffle 14 along the second direction can be L, satisfying the relationship: 15mm≤L≤25mm. It can be understood that the distance between one of the first baffles 13 and the adjacent second baffle 14 along the second direction can be any value between 15mm and 25mm. For example, the distance between one of the first baffles 13 and the adjacent second baffle 14 along the second direction can be, but is not limited to, 15mm, 18mm, 22mm, 25mm, etc. If the distance between the first baffle 13 and the adjacent second baffle 14 is too small, the gas flow cross section will be reduced, thereby causing increased compression and affecting the oil return effect. If the distance between the first baffle 13 and the adjacent second baffle 14 is too large, the impact effect between the oil-gas mixture and the baffle cannot be achieved, reducing the separation efficiency. Therefore, by setting the distance between the first baffle 13 and the adjacent second baffle 14 along the second direction within the above range, the oil-gas mixture can be separated more effectively in the second direction, further improving the oil-gas separation efficiency and facilitating the further sedimentation of tiny oil particles.

[0042] like Figure 2As shown, in some embodiments of this application, the protrusion 113 may include a rising section 1131 and a falling section 1132 connected in sequence. Along the second direction, the rising section 1131 may extend obliquely away from the separation cavity 111, and the falling section 1132 may extend obliquely towards the separation cavity 111. It is understood that the height of the rising section 1131 may gradually increase, and the height of the falling section 1132 may gradually decrease. By providing the rising section 1131 and the falling section 1132, the volume of the separation cavity 111 downstream of the first separating member 12 is increased. Specifically, the rising section 1131 extends obliquely away from the separation cavity 111. One end of the descending section 1132 can be directly opposite the end of the outlet section 121 facing the first separator 12 in the first direction. The end of the descending section 1132 away from the rising section 1131 is directly opposite the side wall of the first baffle 13 facing the first separator 12 in the first direction. Therefore, the oil-gas mixture discharged through the gas outlet 1211 can directly contact the rising section 1131 and continue to flow along the rising section 1131 and the descending section 1132 until it collides with the first baffle 13, so that the oil particles in the oil-gas mixture can adhere to the surface of the first baffle 13, which is beneficial for the further settling of the tiny oil particles.

[0043] like Figure 2 As shown, in some embodiments of this application, the dimension of the lifting section 1131 along the second direction is d1, and the dimension of the lowering section 1132 along the second direction is d2. d1 and d2 can satisfy the relationship: 2≤d1 / d2≤3. It can be understood that the ratio of the dimension of the lifting section 1131 along the second direction to the dimension of the lowering section 1132 along the second direction can be any value between 2 and 3. For example, the ratio of the dimension of the lifting section 1131 along the second direction to the dimension of the lowering section 1132 along the second direction can be, but is not limited to, 2, 2.2, 2.4, 2.6, 2.8, 3, etc. This setting allows the oil-gas mixture discharged through the outlet end 1211 to impact the first baffle 13 at a faster speed and perform oil-gas separation, thereby improving the oil-gas separation efficiency of the oil-gas separator 10.

[0044] like Figure 2 As shown, in some embodiments of this application, the angle between the extension direction of the lifting section 1131 and the second direction is α, satisfying the relationship: 10°≤α≤20°. It can be understood that the angle between the extension direction of the lifting section 1131 and the second direction can be any value between 10° and 20°. For example, the angle between the extension direction of the lifting section 1131 and the second direction can be, but is not limited to, 10°, 12°, 14°, 16°, 18°, 20°, etc. This setting can increase the cavity volume of the downstream separation chamber 111 of the first separating member 12, making it easier for the separated gas to be discharged from the outlet end 1211, while further reducing the flow rate of the separated gas and improving the separation efficiency.

[0045] like Figure 2 As shown, in some embodiments of this application, the housing 11 may include a first bottom wall 114 and a second bottom wall 115. The first bottom wall 114 may be connected to the first separator 12. The oil-gas separator 10 may also include a second separator 15. The second separator 15 may be disposed on the second bottom wall 115 and may be located upstream of the first separator 12. In a specific embodiment, the second separator 15 may be a coarse separator, which may perform preliminary separation of the oil-gas mixture.

[0046] Furthermore, a first oil return port 116 can be provided between the first bottom wall 114 and the second bottom wall 115. After the oil-gas mixture is initially separated by the second separator 15, the oil particles can flow back to the oil sump through the first oil return port 116. Along the first direction, the maximum distance between the first bottom wall 114 and the second bottom wall 115 can be H, satisfying the relationship: 15mm≤H≤25mm. It can be understood that the maximum distance between the first bottom wall 114 and the second bottom wall 115 along the first direction can be any value between 15mm and 25mm. For example, the maximum distance between the first bottom wall 114 and the second bottom wall 115 along the first direction can be, but is not limited to, 15mm, 18mm, 20mm, 22mm, 25mm, etc. This setting ensures that the oil particles separated by the second separator 15 can be discharged through the first oil return port 116, ensuring that the oil return height before separation by the first separator 12 meets the requirements, so that the oil can overcome the pressure loss of the separation system and flow out of the separation chamber 111.

[0047] Furthermore, the pressure inside the separation chamber 111 is low, while the pressure inside the oil sump is high. Therefore, when the engine oil flows back to the oil sump through the first oil return port 116, it needs to overcome the compression of the separation system. Specifically, the maximum distance between the first bottom wall 114 and the first oil return port 116 along the first direction is h, where h can be the oil return height upstream of the first separator 12, the density of the engine oil can be ρ, the gravitational acceleration can be G, and the compression of the oil-gas separator 10 can be Δp, satisfying the following relationship: (ρ*G*h) / Δp*10 6 ≥1, ρ*G*h can be the oil pressure, Δp*10 6 The pressure difference between the separation chamber 111 and the oil sump can be used. When the oil pressure is greater than or equal to the pressure difference between the separation chamber 111 and the oil sump, the oil can be discharged from the first return oil port 116. Therefore, by setting the return oil height h within the above range, it can be ensured that the separated oil can overcome the pressure loss of the separation system by its own gravity and then undergo coarse separation and return oil.

[0048] like Figure 1As shown, in some embodiments of this application, the housing 11 also has a sidewall on one side along the second direction, and the housing 11 is also provided with a second oil return port 118. The second oil return port 118 can return the oil separated by the first separator 12 to the oil sump. The distance between the sidewall and the axis of the air outlet 117 is d, which satisfies the relationship: 50mm≤d≤60mm. It can be understood that the distance between the sidewall and the axis of the air outlet 117 can be any value between 50mm and 60mm. For example, the distance between the sidewall and the axis of the air outlet 117 can be, but is not limited to, 50mm, 53mm, 55mm, 57mm, 60mm, etc. This setting can ensure that when the vehicle is climbing a slope, the oil in the oil sump cannot submerge the second oil return port 118 in a short time, which meets the actual operating conditions of the vehicle.

[0049] The vehicle of the embodiment of this application is briefly described below.

[0050] The vehicle according to the embodiments of this application is equipped with an engine and the oil-gas separator 10 of the above embodiments. The oil-gas separator 10 can be installed on the cam bearing cover of the engine. Since the vehicle according to the embodiments of this application is equipped with an engine and the oil-gas separator 10 of the above embodiments, the oil-gas separator 10 of the vehicle has a housing 11 and a first separating member 12. The top wall 112 of the housing 11 has a protrusion 113. The gas outlet 1211 of the first separating member 12 can be arranged directly opposite to at least a portion of the protrusion 113 in a first direction, so that the gas separated by the first separating member 12 can be more easily discharged from the gas outlet 1211. Furthermore, by providing the protrusion 113, the internal volume of the cavity can be increased, and the flow rate of the separated gas can be slowed down, which is beneficial to improving the oil-gas separation efficiency.

[0051] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0052] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0053] In the description of this application, "multiple" means two or more.

[0054] In the description of this application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0055] In the description of this application, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0056] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0057] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. An oil-gas separator, characterized in that, include: The housing (11) has a separation cavity (111) formed inside it, and the top wall (112) of the housing (11) has a protrusion (113) protruding in a direction away from the separation cavity (111); The first separator (12) is disposed in the separation chamber (111), and the air outlet (1211) of the first separator (12) is disposed corresponding to at least a portion of the protrusion (113) along a first direction.

2. The oil-gas separator according to claim 1, characterized in that, The protrusion (113) includes a rising section (1131) and a descending section (1132) connected in sequence. In the second direction, the rising section (1131) extends obliquely away from the separation cavity (111), and the descending section (1132) extends obliquely towards the separation cavity (111). The second direction is orthogonal to the first direction.

3. The oil-gas separator according to claim 2, characterized in that, The angle between the extension direction of the rising section (1131) and the second direction is α and satisfies: 10°≤α≤20°.

4. The oil-gas separator according to claim 2, characterized in that, The dimension of the rising segment (1131) along the second direction is d1, and the dimension of the falling segment (1132) along the second direction is d2, satisfying: 2≤d1 / d2≤3.

5. The oil-gas separator according to claim 1, characterized in that, The first separator (12) is connected to the inner wall of the separator (111) at both ends along the first direction. The first separator (12) is provided with an outlet (121) on one side along the second direction. The outlet (121) has an air outlet (1211) at one end facing the protrusion (113) and an oil outlet (1212) at the other end away from the protrusion (113).

6. The oil-gas separator according to claim 5, characterized in that, It also includes a first baffle (13) and a second baffle (14), both of which are housed in the separation cavity (111) and spaced apart. The first baffle (13) is connected to the top wall (112) of the housing (11) and extends along the first direction, and the second baffle (14) is connected to the bottom wall of the housing (11) and extends along the first direction.

7. The oil-gas separator according to claim 6, characterized in that, The distance between the first baffle (13) and the adjacent second baffle (14) along the second direction is L and satisfies: 15mm≤L≤25mm.

8. The oil-gas separator according to claim 1, characterized in that, The housing (11) includes a first bottom wall (114) and a second bottom wall (115), wherein the first bottom wall (114) is connected to the first separator (12); The oil-gas separator also includes: The second separator (15) is disposed on the second bottom wall (115) and located upstream of the first separator (12); A first oil return port (116) is provided between the first bottom wall (114) and the second bottom wall (115). Along the first direction, the maximum distance between the first bottom wall (114) and the second bottom wall (115) is H and satisfies: 15mm≤H≤25mm.

9. The oil-gas separator according to claim 1, characterized in that, The housing (11) has a sidewall on one side along the second direction, and the top wall (112) of the housing (11) is provided with an air outlet (117); The distance between the axis of the air outlet (117) and the side wall is d and satisfies: 50mm≤d≤60mm.

10. A vehicle, characterized in that, It includes an engine and an oil-gas separator as described in any one of claims 1-9, the oil-gas separator being disposed on the camshaft bearing cap of the engine.

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