Crankcase and engine having the same

Abstract

The utility model provides a kind of crankcase and the engine with it, wherein, crankcase includes: cylinder cover;Cylinder cover cover is set in the horizontal baffle in, and the horizontal baffle is formed with overflow space between cylinder cover cover, and gas outlet is set on cylinder cover cover;Oil-gas separation structure is set in overflow space;Mounting seat is set in first accommodating space, and second accommodating space is set in mounting seat, and mounting hole, second gas-liquid mixed import, second liquid outlet and gas-liquid mixed outlet are set on mounting seat, second liquid outlet is set in the bottom of mounting seat, and gas-liquid mixed outlet is communicated with first gas-liquid mixed import, and second gas-liquid mixed import mixes higher than second liquid outlet;Camshaft is rotatably set in first accommodating space, and camshaft is arranged in mounting hole;Impeller is set in the end of camshaft.The technical scheme of the application effectively solves the problem of higher cost of oil-gas separator of crankcase in related art.

Description

Technical Field

[0001] This utility model relates to the field of engine technology, and more specifically, to a crankcase and an engine having the same. Background Technology

[0002] With the continuous upgrading of environmental protection standards, more stringent requirements have been placed on engine crankcase ventilation. For example, adopting an active crankcase ventilation system can precisely adjust the internal pressure of the crankcase to a negative pressure state, while also improving the separation efficiency of the air-fuel mixture, effectively reducing the amount of engine oil entering the combustion chamber, thereby reducing emissions and optimizing engine operation.

[0003] In related technologies, an electric motor can be used to drive an oil-gas separator to separate the oil from the gas. However, the motor is usually a brushless motor, which is expensive, and the motor is usually mounted on the outside of the engine, which takes up a lot of space. Utility Model Content

[0004] The main objective of this invention is to provide a crankcase and an engine having the same, in order to solve the problem of high cost of crankcase oil-gas separators in related technologies.

[0005] To achieve the above objectives, according to one aspect of the present invention, a crankcase is provided, comprising: a cylinder head; a cylinder head cover disposed on the cylinder head, wherein a transverse baffle is disposed inside the cylinder head cover, a flow space is formed between the transverse baffle and the cylinder head cover, and a first receiving space is formed between the transverse baffle and the cylinder head, wherein a first gas-liquid mixing inlet and a first liquid outlet are disposed on the transverse baffle, and a gas outlet is disposed on the cylinder head cover, wherein the first gas-liquid mixing inlet, the first outlet, and a second outlet are all connected to the flow space; an oil-gas separation structure disposed within the flow space; and a mounting base disposed within the first receiving space for mounting. The mounting base has a second accommodating space. The mounting base is provided with mounting holes, a second gas-liquid mixing inlet, a second liquid outlet, and a gas-liquid mixing outlet at intervals. All three outlets are connected to the second accommodating space. The second liquid outlet is located at the bottom of the mounting base, and the gas-liquid mixing outlet is connected to the first gas-liquid mixing inlet. The second gas-liquid mixing inlet is higher than the second liquid outlet. A camshaft is rotatably mounted within the first accommodating space and passes through the mounting holes. An impeller is located at the end of the camshaft and within the second accommodating space.

[0006] Furthermore, the mounting base includes a first base body and a second base body disposed opposite to the first base body. The first base body is disposed on the cylinder head, the second base body is disposed between the first base body and the cylinder head cover, a second liquid outlet is disposed at the bottom of the first base body, a gas-liquid mixing outlet is disposed on the second base body, a second receiving space is disposed between the first base body and the second base body, and a mounting hole is disposed between the first base body and the second base body.

[0007] Furthermore, the first base includes a first connecting block and a first half-shell disposed on the side of the first connecting block, the mounting hole includes a first hole body disposed on the side of the first connecting block near the second base, the first receiving space includes a first sub-space disposed on the top of the first half-shell, and the second gas-liquid mixing inlet includes a second hole body disposed on the side of the first half-shell away from the first connecting block.

[0008] Furthermore, the second housing includes a second connecting block and a second half-shell disposed on the side of the second connecting block. The gas-liquid mixing outlet is disposed on the top of the second half-shell. The mounting hole also includes a third hole disposed on the side of the second connecting block near the first housing. The first accommodating space also includes a second sub-space disposed on the bottom of the second half-shell. The second gas-liquid mixing inlet also includes a fourth hole disposed on the side of the second half-shell away from the second connecting block.

[0009] Furthermore, the top of the second half-shell is provided with a first docking boss, the gas-liquid mixing outlet is provided on the first docking boss, the cylinder head cover has a second docking boss, the first gas-liquid mixing inlet is provided on the second docking boss, and the end of the first docking boss near the second docking boss is in contact with the second docking boss.

[0010] Furthermore, the crankcase also includes a connector, with a first connecting hole on the mounting base and a second connecting hole on the cylinder head. The connector passes through the first and second connecting holes to connect the mounting base and the cylinder head.

[0011] Furthermore, the first liquid outlet is connected to the flow space and the first containment space so that the oil flows into the first containment space.

[0012] Furthermore, the oil-gas separation structure is connected to the cylinder head cover and / or transverse baffles.

[0013] Furthermore, the oil-gas separation structure includes multiple staggered baffles, and / or, the oil-gas separation structure includes a non-woven fabric structure.

[0014] According to another aspect of the present invention, an engine is provided, including a crankcase, wherein the crankcase is the crankcase described above.

[0015] The crankcase of this invention includes a cylinder head, a cylinder head cover, an oil-gas separation structure, a mounting base, a camshaft, and an impeller. The first accommodating space can accommodate the camshaft. When the camshaft rotates, it drives the impeller to rotate, allowing the gas-liquid mixture to enter the second accommodating space through the second gas-liquid mixing inlet. Under the action of the impeller, some oil is separated from the gas and flows out through the second liquid outlet, while some of the gas-liquid mixture enters the first gas-liquid mixing inlet through the gas-liquid mixing outlet. In other words, by mounting the impeller on the camshaft, the camshaft can drive the impeller to rotate, avoiding the need for a motor to drive the impeller and reducing the cost of the oil-gas separator. The gas-liquid mixture flows into the flow space through the first gas-liquid mixing inlet, where it is separated by the oil-gas separation structure. The oil flows out through the first liquid outlet, and the gas flows out through the gas outlet. Therefore, the technical solution of this application effectively solves the problem of high cost of crankcase oil-gas separators in related technologies. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0017] Figure 1 A partial cross-sectional view of an embodiment of the crankcase according to the present invention is shown.

[0018] Figure 2 It shows Figure 1 A three-dimensional structural diagram of the camshaft and impeller of the crankcase;

[0019] Figure 3 It shows Figure 1 A three-dimensional structural diagram of the crankcase mounting bracket.

[0020] The above figures include the following reference numerals:

[0021] 10. Cylinder head; 20. Cylinder head cover; 21. Transverse partition; 211. First gas-liquid mixing inlet; 212. First liquid outlet; 22. Flow space; 23. First receiving space; 24. Second docking boss; 30. Oil-gas separation structure; 31. Baffle; 32. Non-woven fabric structure; 40. Mounting base; 41. Second receiving space; 42. Mounting hole; 43. Second gas-liquid mixing inlet; 431. Second hole body; 432. Fourth hole body; 44. Second liquid outlet; 45. Gas-liquid mixing outlet; 46. First seat body; 461. First connecting block; 462. First half-shell; 47. Second seat body; 471. Second connecting block; 472. Second half-shell; 4721. First docking boss; 48. First connecting hole; 50. Camshaft; 60. Impeller. Detailed Implementation

[0022] The technical solutions of the present utility model 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 utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0023] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0024] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0025] like Figures 1 to 3As shown, the crankcase of this embodiment includes: a cylinder head 10, a cylinder head cover 20, an oil-gas separator 30, a mounting base 40, a camshaft 50, and an impeller 60. The cylinder head cover 20 is mounted on the cylinder head 10. A transverse baffle 21 is provided inside the cylinder head cover 20, forming a flow space 22 between the transverse baffle 21 and the cylinder head cover 20. A first receiving space 23 is formed between the transverse baffle 21 and the cylinder head 10. A first gas-liquid mixing inlet 211 and a first liquid outlet 212 are provided on the transverse baffle 21. A gas outlet is provided on the cylinder head cover 20. The first gas-liquid mixing inlet 211, the first outlet, and the second outlet are all connected to the flow space 22. The oil-gas separator 30 is disposed within the flow space 22. Mounting base 40 is disposed within the first receiving space 23, and a second receiving space 41 is disposed within the mounting base 40. Mounting base 40 is provided with mounting holes 42, a second gas-liquid mixing inlet 43, a second liquid outlet 44, and a gas-liquid mixing outlet 45, spaced apart. The second gas-liquid mixing inlet 43, the second liquid outlet 44, and the gas-liquid mixing outlet 45 are all connected to the second receiving space 41. The second liquid outlet 44 is located at the bottom of the mounting base 40, and the gas-liquid mixing outlet 45 is connected to the first gas-liquid mixing inlet 211. The mixing at the second gas-liquid mixing inlet 43 is higher than that at the second liquid outlet 44. Camshaft 50 is rotatably disposed within the first receiving space 23 and passes through the mounting hole 42. Impeller 60 is disposed at the end of camshaft 50 and located within the second receiving space 41.

[0026] Using the technical solution of this embodiment, the crankcase includes a cylinder head 10, a cylinder head cover 20, an oil-gas separation structure 30, a mounting base 40, a camshaft 50, and an impeller 60. The first accommodating space 23 can accommodate the camshaft 50. When the camshaft 50 rotates, it drives the impeller 60 to rotate, allowing the gas-liquid mixture to enter the second accommodating space 41 through the second gas-liquid mixing inlet 43. Under the action of the impeller 60, some oil is separated from the gas and flows out through the second liquid outlet 44, while some gas-liquid mixture enters the first gas-liquid mixing inlet 211 through the gas-liquid mixing outlet 45. That is, by setting the impeller 60 on the camshaft 50, the camshaft 50 can drive the impeller 60 to rotate, avoiding the need for a motor to drive the impeller 60 and reducing the cost of the oil-gas separator. The gas-liquid mixture flows into the flow space 22 through the first gas-liquid mixing inlet 211, where it is separated under the action of the oil-gas separation structure 30. The oil flows out through the first liquid outlet 212, and the gas flows out through the gas outlet. Therefore, the technical solution of this embodiment effectively solves the problem of high cost of crankcase oil-gas separator in related technologies.

[0027] like Figures 1 to 3As shown, in this embodiment, the mounting base 40 includes a first base 46 and a second base 47 disposed opposite to the first base 46. The first base 46 is disposed on the cylinder head 10, and the second base 47 is disposed between the first base 46 and the cylinder head cover 20. A second liquid outlet 44 is disposed at the bottom of the first base 46, a gas-liquid mixing outlet 45 is disposed on the second base 47, a second receiving space 41 is disposed between the first base 46 and the second base 47, and a mounting hole 42 is disposed between the first base 46 and the second base 47. The first base 46 and the second base 47 facilitate the installation of the impeller 60 into the mounting base 40 and also facilitate the installation of the camshaft 50 into the mounting hole 42.

[0028] like Figures 1 to 3 As shown, in this embodiment, the first base 46 includes a first connecting block 461 and a first half-shell 462 disposed on the side of the first connecting block 461. The mounting hole 42 includes a first bore disposed on the side of the first connecting block 461 near the second base 47. The first receiving space 23 includes a first sub-space disposed on the top of the first half-shell 462. The second gas-liquid mixing inlet 43 includes a second bore 431 disposed on the side of the first half-shell 462 away from the first connecting block 461. With the above arrangement, the camshaft 50 can pass through the first bore, the impeller 60 can be installed in the first sub-space, and the gas-liquid mixture can enter the first sub-space through the second bore 431.

[0029] like Figures 1 to 3 As shown, in this embodiment, the second base 47 includes a second connecting block 471 and a second half-shell 472 disposed on the side of the second connecting block 471. A gas-liquid mixing outlet 45 is disposed on the top of the second half-shell 472. The mounting hole 42 also includes a third hole disposed on the side of the second connecting block 471 near the first base 46. The first receiving space 23 also includes a second sub-space disposed at the bottom of the second half-shell 472. The second gas-liquid mixing inlet 43 also includes a fourth hole 432 disposed on the side of the second half-shell 472 away from the second connecting block 471. With the above arrangement, the camshaft 50 can pass through the third hole, the impeller 60 can be installed in the second sub-space, and the gas-liquid mixture can enter the second sub-space through the fourth hole 432.

[0030] like Figures 1 to 3As shown, in this embodiment, the top of the second half-shell 472 is provided with a first docking boss 4721, and the gas-liquid mixing outlet 45 is provided on the first docking boss 4721. The cylinder head cover 20 has a second docking boss 24, and the first gas-liquid mixing inlet 211 is provided on the second docking boss 24. The end of the first docking boss 4721 near the second docking boss 24 is in contact with the second docking boss 24. The arrangement of the first docking boss 4721 and the second docking boss 24 facilitates the flow of the gas-liquid mixture and prevents the gas-liquid mixture from flowing out of the gas-liquid mixing outlet 45 and moving around randomly inside the cylinder head cover 20.

[0031] The second docking boss 24 is part of the structure of the transverse partition 21.

[0032] like Figure 1 As shown, in this embodiment, the crankcase also includes a connector. The mounting base 40 has a first connecting hole 48, and the cylinder head 10 has a second connecting hole. The connector passes through the first connecting hole 48 and the second connecting hole to connect the mounting base 40 and the cylinder head 10. The connector can pass through the first connecting hole 48 and the second connecting hole, thereby connecting the mounting base 40 and the cylinder head cover 20.

[0033] Part of the structure of the first connecting hole 48 is disposed on the first connecting block 461 of the first base 46, and another part of the structure is disposed on the second connecting block 471 of the second base 47.

[0034] It should be noted that the connector is a fastener, and there are multiple connectors, multiple first connecting holes 48 and multiple second connecting holes arranged at intervals. The multiple connectors, multiple first connecting holes 48 and multiple second connecting holes are arranged one-to-one.

[0035] like Figure 1 As shown, in this embodiment, the first liquid outlet 212 connects the flow space 22 and the first receiving space 23, so that oil can flow into the first receiving space 23. The oil can flow back to the first receiving space 23 through the first liquid outlet 212.

[0036] like Figure 1 As shown, in this embodiment, the oil-gas separation structure 30 is connected to the cylinder head cover 20 and / or the transverse partition 21. This makes the position of the oil-gas separation structure 30 more stable.

[0037] like Figure 1 As shown, in this embodiment, the oil-gas separation structure 30 includes a plurality of staggered baffles 31, and the oil-gas separation structure 30 includes a non-woven fabric structure 32. The gas-liquid mixture can collide with the baffles 31, causing the gas and oil to separate. The non-woven fabric structure 32 also enables the separation of gas and oil.

[0038] It should be noted that the baffle 31 is provided with multiple fifth holes to facilitate the passage of gas through the baffle 31 and the movement of oil through the surface of the baffle 31 from the transverse partition 21 to the camshaft 50. The multiple baffles 31 are arranged in a labyrinthine manner. Specifically, among the multiple baffles 31, one of the two adjacent baffles 31 is connected to the cylinder head cover 20, and the other baffle is connected to the transverse partition 21.

[0039] The oil-gas separation structure 30 also includes an end plate, the two ends of which are connected to the cylinder head cover 20 and the transverse partition 21, respectively. The end plate is provided with a plurality of sixth holes. The end plate is positioned between the first gas-liquid mixing inlet 211 and the plurality of baffles 31.

[0040] It should be noted that the nonwoven fabric structure 32 is located downstream of the plurality of baffles 31. The first liquid outlet 212 includes two spaced apart, one of which is located below the plurality of baffles 31, and the other is located downstream of the nonwoven fabric structure 32.

[0041] Specifically, the impeller 60 and the camshaft 50 can be an integral structure, or they can be connected by bolts. The mounting base 40 serves as both the outer shell of the impeller 60 and the bearing housing of the camshaft 50. That is, an oil film is formed on the inner wall of the mounting hole 42 to lubricate the camshaft 50.

[0042] When the engine is running, the impeller 60 rotates together with the camshaft 50. Crankcase blow-by gas enters the mounting base 40 and the flow space 22 through the impeller 60, where oil and gas are separated. The blow-by gas that has undergone oil-gas separation eventually enters the engine intake system, and the separated oil flows back to the crankcase through the oil drain hole. The oil is engine oil.

[0043] In this embodiment, the camshaft 50 drives the impeller 60 to achieve active ventilation of the crankcase. The wind pressure generated by the impeller 60 can cause the blow-by gas to enter the second containment space 41 through the second gas-liquid mixing inlet 43 and flow through the flow space 22 at a high speed, thereby improving the oil-gas separation efficiency and making the crankcase pressure negative.

[0044] The crankcase blow-by gas flowing out of the gas-liquid mixture outlet 45 enters the flow space 22 through the first gas-liquid mixture inlet 211 and comes into contact with the oil-gas separation structure 30. The blow-by gas completes oil-gas separation in the flow space 22, and the separated engine oil flows back to the crankcase through the first liquid outlet 212. After oil-gas separation, the crankcase blow-by gas finally enters the engine intake system and participates in engine combustion.

[0045] The engine of this embodiment includes a crankcase, which is the crankcase described above. The crankcase can drive the impeller 60 to rotate via the camshaft 50, eliminating the need for a motor to drive the impeller 60 and reducing the cost of the oil-gas separator. The engine with the aforementioned crankcase also has the advantages described above.

[0046] In the description of this utility model, it should be understood that "multiple" means two or more. Directional terms such as "front, back, up, down, left, right," "horizontal, vertical, perpendicular, horizontal," and "top, bottom" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are used solely for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms 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 limiting the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner or outer contours relative to the outline of each component itself.

[0047] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0048] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0049] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A crankcase, characterized in that, include: Cylinder head (10); A cylinder head cover (20) is disposed on the cylinder head (10). A transverse partition (21) is disposed inside the cylinder head cover (20). A flow space (22) is formed between the transverse partition (21) and the cylinder head cover (20). A first receiving space (23) is formed between the transverse partition (21) and the cylinder head (10). A first gas-liquid mixing inlet (211) and a first liquid outlet (212) are disposed on the transverse partition (21). A gas outlet is disposed on the cylinder head cover (20). The first gas-liquid mixing inlet (211), the first outlet and the second outlet are all connected to the flow space (22). An oil-gas separation structure (30) is disposed within the flow space (22); A mounting base (40) is disposed within the first accommodating space (23). A second accommodating space (41) is disposed within the mounting base (40). The mounting base (40) is provided with mounting holes (42), a second gas-liquid mixing inlet (43), a second liquid outlet (44), and a gas-liquid mixing outlet (45) at intervals. The second gas-liquid mixing inlet (43), the second liquid outlet (44), and the gas-liquid mixing outlet (45) are all connected to the second accommodating space (41). The second liquid outlet (44) is disposed at the bottom of the mounting base (40). The gas-liquid mixing outlet (45) is connected to the first gas-liquid mixing inlet (211). The mixing of the second gas-liquid mixing inlet (43) is higher than that of the second liquid outlet (44). A camshaft (50) is rotatably disposed within the first receiving space (23), and the camshaft (50) passes through the mounting hole (42); An impeller (60) is disposed at the end of the camshaft (50) and located within the second receiving space (41).

2. The crankcase according to claim 1, characterized in that, The mounting base (40) includes a first base (46) and a second base (47) disposed opposite to the first base (46). The first base (46) is disposed on the cylinder head (10), and the second base (47) is disposed between the first base (46) and the cylinder head cover (20). The second liquid outlet (44) is disposed at the bottom of the first base (46), the gas-liquid mixing outlet (45) is disposed on the second base (47), the second accommodating space (41) is disposed between the first base (46) and the second base (47), and the mounting hole (42) is disposed between the first base (46) and the second base (47).

3. The crankcase according to claim 2, characterized in that, The first base (46) includes a first connecting block (461) and a first half-shell (462) disposed on the side of the first connecting block (461). The mounting hole (42) includes a first hole body disposed on the side of the first connecting block (461) near the second base (47). The first accommodating space (23) includes a first sub-space disposed on the top of the first half-shell (462). The second gas-liquid mixing inlet (43) includes a second hole body (431) disposed on the side of the first half-shell (462) away from the first connecting block (461).

4. The crankcase according to claim 2, characterized in that, The second base (47) includes a second connecting block (471) and a second half-shell (472) disposed on the side of the second connecting block (471). The gas-liquid mixing outlet (45) is disposed on the top of the second half-shell (472). The mounting hole (42) also includes a third hole, which is disposed on the side of the second connecting block (471) near the first base (46). The first accommodating space (23) also includes a second sub-space, which is disposed on the bottom of the second half-shell (472). The second gas-liquid mixing inlet (43) also includes a fourth hole (432), which is disposed on the side of the second half-shell (472) away from the second connecting block (471).

5. The crankcase according to claim 4, characterized in that, The top of the second half-shell (472) is provided with a first docking boss (4721), the gas-liquid mixing outlet (45) is provided on the first docking boss (4721), the cylinder head cover (20) has a second docking boss (24), the first gas-liquid mixing inlet (211) is provided on the second docking boss (24), and the end of the first docking boss (4721) near the second docking boss (24) is in contact with the second docking boss (24).

6. The crankcase according to any one of claims 1 to 5, characterized in that, The crankcase also includes a connector. The mounting base (40) is provided with a first connecting hole (48), and the cylinder head (10) is provided with a second connecting hole. The connector passes through the first connecting hole (48) and the second connecting hole to connect the mounting base (40) and the cylinder head (10).

7. The crankcase according to any one of claims 1 to 5, characterized in that, The first liquid outlet (212) connects the flow space (22) and the first containment space (23) so that the oil flows into the first containment space (23).

8. The crankcase according to any one of claims 1 to 5, characterized in that, The oil-gas separation structure (30) is connected to the cylinder head cover (20) and / or the transverse partition (21).

9. The crankcase according to any one of claims 1 to 5, characterized in that, The oil-gas separation structure (30) includes a plurality of staggered baffles (31), and / or the oil-gas separation structure (30) includes a non-woven fabric structure (32).

10. An engine, comprising a crankcase, characterized in that, The crankcase is the crankcase according to any one of claims 1 to 9.

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