CN220319692U

CN220319692U - Cylinder head cover and motorcycle

Info

Publication number: CN220319692U
Application number: CN202321806613.5U
Authority: CN
Inventors: 康立东
Original assignee: Jiangmen Dachangjiang Group Co Ltd
Current assignee: Jiangmen Dachangjiang Group Co Ltd
Priority date: 2023-07-10
Filing date: 2023-07-10
Publication date: 2024-01-09
Anticipated expiration: 2033-07-10

Abstract

The present application relates to a cylinder head cover and a motorcycle. The cylinder head cover comprises a cover body, a baffle piece, a ventilation piece and an oil baffle piece. The cover body is provided with an exhaust port, and the exhaust port is used for exhausting the oil-gas mixture; the baffle piece is convexly arranged on the inner surface of the cover body; the ventilation sheet cover is arranged on the baffle piece and is matched with the baffle piece to form an oil-gas separation cavity and an oil-gas inlet, and the oil-gas inlet is communicated with the exhaust port through the oil-gas separation cavity; the oil baffle is connected with the ventilation sheet, and extends from the position of the oil gas inlet along the opposite direction of the through flow direction of the oil gas inlet to form a cornice structure, and the cornice structure is arranged at intervals with the cover body under the support of the baffle. The cylinder head cover provided by the application has the advantages that most engine oil in an oil-gas mixture can be separated under the condition that the air inlet capacity of an oil-gas separation cavity is not affected, so that the capacity of separating engine oil and waste gas of the cylinder head cover is improved, and the enclosure cost of a motorcycle engine is reduced.

Description

Cylinder head cover and motorcycle

Technical Field

The application relates to the technical field of motorcycle engines, in particular to a cylinder head cover and a motorcycle.

Background

In a motorcycle engine, a breather pipe joint is arranged on a cylinder head cover and is used for discharging engine oil-mixed waste gas in a crankcase of the engine out of the cylinder head cover. The traditional cylinder head cover is provided with the oil-gas separation cavity, engine oil in the exhaust gas is reserved on the inner wall of the labyrinth structure in the process of detouring in the labyrinth structure, so that the exhaust gas and the engine oil are separated, the discharge amount of the engine oil along with the exhaust gas discharged out of the cylinder head cover is reduced, and further the loss of the engine oil is reduced. However, when the engine works under high load, a large amount of engine oil is mixed in the exhaust gas, the traditional cylinder head cover is insufficient to sufficiently reduce the discharge amount of the engine oil, and a large amount of engine oil is still lost.

Disclosure of Invention

Based on this, it is necessary to provide a cylinder head cover and a motorcycle against the problem that a large amount of engine oil in a crankcase enters an air cleaner with exhaust gas when an engine is operated at a high load.

In one aspect, the present application provides a cylinder head cover, the cylinder head cover comprising:

the cover body is provided with an exhaust port which is used for exhausting the oil-gas mixture;

the baffle piece is convexly arranged on the inner surface of the cover body;

the ventilation sheet is covered on the baffle piece and matched with the baffle piece to form an oil-gas separation cavity and an oil-gas inlet, and the oil-gas inlet is communicated with the exhaust port through the oil-gas separation cavity; and

the oil baffle is connected with the ventilation sheet, and the oil baffle extends from the position of the oil gas inlet along the opposite direction of the through flow direction of the oil gas inlet to form a cornice structure, and the cornice structure is arranged at intervals with the cover body under the support of the baffle.

In one embodiment, the edge of the oil baffle is provided with a chamfer.

In one embodiment, the baffle member includes a first baffle wall and a second baffle wall, one end of the first baffle wall is connected with the cover body, one end of the second baffle wall is connected with the cover body, one end of the first baffle wall connected with the cover body and one end of the second baffle wall connected with the cover body are respectively located at two sides of the exhaust port, so that exhaust gas is discharged through the exhaust port after the oil-gas mixture is separated from engine oil in the oil-gas separation cavity.

In one embodiment, the barrier further includes a third barrier wall disposed in spaced relation between an end of the first barrier wall remote from the exhaust port and an end of the second barrier wall remote from the exhaust port, the hydrocarbon inlet includes a first inlet formed between the first barrier wall and the third barrier wall and a second inlet formed between the second barrier wall and the third barrier wall.

In one embodiment, the baffle further includes a fourth baffle wall, the fourth baffle wall is arc-shaped, the fourth baffle wall is disposed on the cover body and corresponds to the first inlet, the middle of the fourth baffle wall is close to the first inlet, and two ends of the fourth baffle wall are far away from the first inlet.

In one embodiment, the baffle further comprises a rib, the rib comprises a plurality of branches, the branches are arranged at intervals and extend towards the baffle, and the rib is used for forming an oil-gas separation channel with the baffle in the oil-gas separation cavity to attach engine oil in the oil-gas mixture.

In one embodiment, the cover body is provided with a perforation, the ventilation sheet is provided with an observation hole, the observation hole corresponds to the perforation, the perforation upper cover is provided with an ocular, and the ocular is opposite to the observation hole.

In one embodiment, the perforations are located on the ribs.

In one embodiment, the cover body is provided with two mounting holes, the two mounting holes are diagonally arranged, and part of the first retaining wall or the second retaining wall is arranged around part of the edge of at least one mounting hole.

On the other hand, the application also provides a motorcycle, which comprises a motorcycle body, an engine, an air filter and the cylinder head cover, wherein the engine is arranged on the motorcycle body, the cylinder head cover is arranged on the engine, and the exhaust port is communicated with the air filter.

According to the cylinder head cover, the oil blocking piece with the cornice structure is arranged on the ventilation piece, engine oil in the engine can be prevented from entering the oil-gas separation cavity along with waste gas on the premise that the air inflow of the oil-gas separation cavity is not greatly influenced, and then the quantity of engine oil in the engine is reduced when the engine runs under high load, so that the maintenance cost of the engine can be reduced.

Drawings

Fig. 1 is a schematic structural view of a cylinder head cover according to an embodiment of the present application.

Fig. 2 is a schematic structural diagram of a cover according to an embodiment of the present application.

Fig. 3 is a schematic view of a structure of a cover at another angle in an embodiment of the present application.

The accompanying drawings indicate:

100. a cover body; 101. an exhaust port; 110. a first clearance portion; 111. perforating; 120. a second clearance portion; 121. a first mounting hole; 130. a third clearance portion; 131. a second mounting hole; 140. an eyepiece; 150. a vent tube joint; 200. a barrier; 201. a first inlet; 202. a second inlet; 210. a first baffle wall; 220. a second baffle wall; 230. a third baffle wall; 240. a fourth baffle wall; 250. a rib; 251. straight edges; 252. supporting the edges; 300. a ventilation sheet; 310. an observation hole; 400. and the oil baffle piece.

Detailed Description

In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is, however, susceptible of embodiment in many other forms than those described herein and similar modifications can be made by those skilled in the art without departing from the spirit of the application, and therefore the application is not to be limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that, if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., these terms refer to the orientation or positional relationship based on the drawings, which are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.

In this application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

As described in the background art, the conventional cylinder head cover is easy to move out of the cylinder head cover along with exhaust gas and enter the air filter when the motorcycle engine works under high load, so that the engine oil and the air filter are rapidly lost, and the maintenance cost of the motorcycle engine is increased. Accordingly, the present application provides a cylinder head cover as described below.

Referring to fig. 1, fig. 1 shows a schematic structure of a cylinder head cover in an embodiment of the present application. The cylinder head cover includes a cover body 100, a barrier 200, a ventilation flap 300, and an oil barrier 400. The cover 100 is provided with an exhaust port 101 for discharging the oil-gas mixture. The baffle 200 is convexly arranged on the inner surface of the cover body 100, and the ventilation sheet 300 is covered on the baffle 200 and is matched with the baffle 200 to form an oil-gas separation cavity and an oil-gas inlet, and the oil-gas inlet is communicated with the exhaust port 101 through the oil-gas separation cavity. The oil baffle 400 is connected with the ventilation sheet 300, and the oil baffle 400 extends from the position of the oil gas inlet along the opposite direction of the through flow direction of the oil gas inlet to form a cornice structure, and the cornice structure is arranged at intervals with the cover body 100 under the support of the baffle 200.

The cylinder head cover is provided with the oil baffle 400 with the cornice structure on the ventilation sheet 300, so that most oil drops in the oil-gas mixture are blocked outside the oil-gas separation cavity before the oil-gas mixture enters the oil-gas separation cavity through the oil-gas inlet, the engine oil content in waste gas outside the cylinder head cover is reduced, the engine oil discharge amount is not increased even if the engine works under high load, and the maintenance cost of the engine is effectively reduced. On the other hand, the cornice structure is kept at a distance from the cover body 100 under the support of the baffle 200, so that resistance is not increased to the through flow of the oil-gas mixture, and the oil-gas mixture can be ensured to normally enter the oil-gas separation cavity.

Referring to fig. 1 and 3, an exemplary cover 100 is covered on a crankcase (not shown), an inner wall of the cover 100 faces the crankcase, a barrier 200 is provided on the inner wall of the cover 100, the barrier 200 includes a plurality of ribs, the ribs are in a smooth curved strip shape, a shape of a ventilation sheet 300 corresponds to a shape formed by the outermost ribs of the barrier 200, the ventilation sheet 300 is fixedly covered on the ribs, the ventilation sheet 300 forms an oil-gas separation cavity with the ribs and an inner surface of the cover 100, and engine oil in an oil-gas mixture can be adhered to both a cavity wall and an outer wall of the ribs in the oil-gas separation cavity to separate engine oil and exhaust gas. It will be appreciated that the outermost ridge is of discontinuous design, with the oil and gas inlet being formed at the break of the outermost ridge. The exhaust port 101 is provided on the cover body 100, and the exhaust port 101 communicates with the oil-gas separation chamber, so that an oil-gas mixture in which the engine oil and the exhaust gas are mixed enters the oil-gas separation chamber from the oil-gas inlet, separates the engine oil and the exhaust gas, and flows to the exhaust port 101 by the guiding action of the ribs. A vent fitting 150 is provided in the vent 101 to facilitate engagement of a gas tube (not shown) on the outside of the cover 100 through which exhaust gas is directed elsewhere.

In particular, the oil baffle 400 is connected to the vent sheet 300 and corresponds to an oil-gas inlet, and as can be appreciated in conjunction with fig. 1 and 2, at the oil-gas inlet below the cover 100, the oil-gas mixture enters the oil-gas separation chamber approximately in the left-right direction, and at the left side of the oil-gas inlet, the oil-gas mixture flows from left to right, and at the right side of the oil-gas inlet, the oil-gas mixture flows from right to left. Accordingly, the cornice structure of the oil baffle 400 extends away from the oil inlet along the left and right directions at both sides of the oil inlet, so that the oil baffle capability of oil drops in the oil-gas mixture can be improved, the oil drops are blocked outside the oil-gas separation cavity, and the oil content of the oil-gas mixture in the oil-gas separation cavity is reduced. It will be appreciated that at the oil and gas inlet on the right side of the cover 100, the oil and gas mixture flows from bottom to top, and the cornice structure of the oil baffle 400 extends away from the oil and gas inlet in a downward direction. In this embodiment, the extending distance of the cornice structure is 1-3cm, and in this length interval, the oil baffle 400 can not only block most of oil drops, but also not excessively increase the resistance for the oil-gas mixture to enter the oil-gas inlet, so that the effect is optimal.

With continued reference to FIG. 1, in some embodiments, the edges of the oil deflector 400 are provided with chamfer locations. Illustratively, the oil baffle 400 and the vent sheet 300 are disposed on the same plane, and the oil baffle 400 extends from the edge of the vent sheet 300 toward the inner wall of the cover 100, so as to completely cover the oil gas inlet. The oil baffle 400 extends out of the outer edge of the cornice structure of the ventilation sheet 300 to form two right angles, and the two right angles are chamfered, so that the inside of the cover body 100 or the hands of an installer can be prevented from being scratched when the oil baffle 400 is installed or detached, and the safety is improved.

In some embodiments, the oil deflector 400 is integrally formed with the vent sheet 300, i.e., the vent sheet 300 and the oil deflector 400 are one structural piece. Referring to fig. 1, the ventilation sheet 300 and the oil deflector 400 are integrated, wherein, in order to facilitate understanding of the cornice structure formed by the oil deflector 400, a dotted line is adopted in fig. 1 to divide the ventilation sheet 300 and the oil deflector 400, and in fact, for the integrated oil deflector 400 and the ventilation sheet 300, there is no obvious boundary between the two in appearance. After the vent flap 300 and the oil deflector 400 are mounted to the cover 100, the cornice structure is defined by a structure in which the position of the oil air inlet extends in the opposite direction to the flow direction of the oil air inlet.

In other embodiments, the oil baffle 400 may also be a sheet removably mounted to the vent sheet 300. It can be appreciated that when the oil deflector 400 is detachably mounted on the ventilation sheet 300, sheets having cornice structures with different sizes or different shapes can be mounted according to actual needs to achieve the best oil deflector effect.

Referring to fig. 2, in some embodiments, the barrier 200 includes a first barrier wall 210 and a second barrier wall 220, one end of the first barrier wall 210 is connected to a side wall of the cover 100, one end of the second barrier wall 220 is also connected to the side wall of the cover 100, and one end of the first barrier wall 210 connected to the side wall of the cover 100 and one end of the second barrier wall 220 connected to the side wall of the cover 100 are respectively located at two sides of the exhaust port 101, so that exhaust gas is discharged through the exhaust port 101 after the oil-gas mixture separates engine oil in the oil-gas separation cavity. Taking fig. 2 as an example, the first blocking wall 210 and the second blocking wall 220 are smooth curved ribs, and in the middle of the inner surface of the cover body 100, the first blocking wall 210 and the second blocking wall 220 are far away from each other to form an oil-gas separation cavity, and the upper ends of the first blocking wall 210 and the second blocking wall 220 are converged on the upper side and the lower side of the exhaust port 101, so that in the process of guiding the oil-gas mixture from the oil-gas separation cavity to the exhaust port 101, the first blocking wall 210 and the second blocking wall 220 bond engine oil in the oil-gas mixture to separate the engine oil from exhaust gas, so that the separated exhaust gas is discharged from the exhaust port 101, and the probability of discharging the oil from the exhaust port 101 is reduced.

In some embodiments, the barrier 200 further includes a third barrier wall 230, the third barrier wall 230 being disposed in spaced relation between an end of the first barrier wall 210 remote from the exhaust port and an end of the second barrier wall 220 remote from the exhaust port, the hydrocarbon inlet including a first inlet 201 and a second inlet 202, the first inlet 201 being formed between the first barrier wall 210 and the third barrier wall 230, the second inlet 202 being formed between the second barrier wall 220 and the third barrier wall 230. With continued reference to fig. 2, the distance between the lower ends of the first and second retaining walls 210, 220 is illustratively large and sufficient to provide a third retaining wall 230. The lower end of the third blocking wall 230 is spaced apart from the lower end of the first blocking wall 210 to form the first inlet 201. The upper end of the third baffle wall 230 is spaced apart from the lower end of the second baffle wall 230 to form the second inlet 202. Through the third baffle wall 230, two oil-gas inlets can be formed on the cover body 100 by matching with the first baffle wall 210 and the second baffle wall 220, and the oil-gas mixture can be shunted into the oil-gas separation cavity, so that the oil-gas separation cavity has better separation effect on the engine oil in the oil-gas mixture.

With continued reference to fig. 2, in some embodiments, the baffle 200 further includes a fourth baffle wall 240, where the fourth baffle wall 240 is curved, the fourth baffle wall 240 is disposed on the cover 100 and corresponds to the first inlet 201, a middle portion of the fourth baffle wall 240 is close to the first inlet 201, and two ends of the fourth baffle wall 240 are far from the first inlet 201. Specifically, the length of the fourth blocking wall 240 is slightly greater than the length of the first inlet 201, the middle of the fourth blocking wall 240 is close to the first inlet 201, and both ends of the fourth blocking wall 240 are bent toward a side away from the first inlet 201. By providing the fourth baffle 240 in the above manner, the oil-gas mixture can be introduced into the first inlet 201 from both sides of the first inlet 201, the intake air amount can be increased, and the separation effect of the oil-gas separation chamber on the engine oil in the oil-gas mixture can be further improved. It will be appreciated that the oil deflector 400 also completely covers the entire fourth baffle wall 240 to reduce the ingress of oil from the oil and gas mixture into the first inlet 201 from both sides of the first inlet 201.

With continued reference to FIG. 2, in some embodiments, the baffle 200 further includes a rib 250 including a plurality of ribs 252, the plurality of ribs 252 spaced apart and extending toward the baffle 200, the rib 250 configured to form a separation channel with the baffle 200 within the oil and gas separation chamber to adhere to engine oil in the oil and gas mixture. In the exemplary embodiment, rib 250 includes a straight edge 251 and four branched edges 252 extending from straight edge 251 to both sides, wherein two branched edges 252 extend in the direction of first barrier wall 210 and the other two branched edges 252 extend in the direction of third barrier wall 230. Providing the rib 250 with the straight rib 251 and the plurality of branched ribs 252 can form a gas-oil separation channel in the gas-oil separation cavity, wherein the gas-oil separation channel is provided with a mechanism similar to a labyrinth so as to increase the length of the moving path of the gas-oil mixture in the gas-oil separation cavity, and the engine oil in the gas-oil mixture is facilitated to be adhered to the rib 250 and the three baffle walls so as to separate the engine oil and the exhaust gas.

Referring to fig. 1, 2 and 3, in some embodiments, the cover 100 is provided with a through hole 111, the ventilation sheet 300 is provided with an observation hole 310, the observation hole 310 corresponds to the through hole 111, the through hole 111 is covered with an eyepiece 140, and the eyepiece 140 is opposite to the observation hole 310. Specifically, the cover body 100 is provided with a first space avoiding portion 110, the first space avoiding portion 110 is disposed in the middle of the cover body 100, and the first space avoiding portion 110 is circular and is recessed from one side of the cover body 100 away from the crankcase to a direction approaching the ventilation sheet 300. The vent sheet 300 is provided with an observation hole 310 at a position corresponding to the perforation 111, the first space avoiding part 110 is covered with an eyepiece 140, and the eyepiece 140 can be used for observing the working condition in the cover body 100 through the perforation 111 and the observation hole 310 and also preventing the oil-gas mixture in the cover body 100 from being sprayed out of the perforation 111 through the observation hole 310.

Referring to fig. 2 and 3, in some embodiments, perforations 111 are provided on rib 250. For example, the first space avoiding portion 110 corresponds to the straight edge 251, cuts the straight edge 251 from the middle, and the perforation 111 is located on the straight edge 251, so that the perforation 111 can be prevented from being opened on the oil-gas separation channel in the oil-gas separation cavity, oil drops adhered in the oil-gas separation cavity can be prevented from affecting observation, and the observation effect is more ideal.

Referring to fig. 1, 2 and 3, in some embodiments, two mounting holes are provided in the cover, the two mounting holes being diagonally disposed. Illustratively, the two mounting holes are a first mounting hole 121 and a second mounting hole 131, the cover 100 is further provided with a second space avoiding portion 120 and a third space avoiding portion 130, the first space avoiding portion 110 and the second space avoiding portion 120 are both recessed from the cover 100 toward a direction of a side of the ventilation sheet 300, the first mounting hole 121 is disposed on the second space avoiding portion 120, and the second mounting hole 131 is disposed on the third space avoiding portion 130. The first mounting hole 121 and the second mounting hole 131 are used for mounting bolts (not shown), and the cover 100 can be more firmly mounted on the crankcase by diagonally disposing the first and second clearance portions 110 and 120 on the cover 100.

Referring to fig. 2, in some embodiments, a portion of the first retaining wall 210 or the second retaining wall 220 is disposed around a portion of an edge of the at least one mounting hole. In an exemplary embodiment, a portion of the second blocking wall 220 is snugly disposed on the inner wall of the cover body 100, and the second blocking wall 220 is disposed to be snugly disposed with an edge portion of about a lower left quarter of the third through hole 131 after extending downward perpendicularly to the inner wall of the cover body 100 on the inner surface of the cover body 100 and above the second mounting hole 131. Since part of the second blocking wall 220 is disposed around part of the edge of the second mounting hole 131, the blocking member 200 is also pressed by the bolt when the cover 100 is fixed to the crankcase by using the bolt, so that the fixing effect of the blocking member 200 and the breather piece 300 is better, and the oil-gas separation chamber has a better separation effect on the engine oil and the exhaust gas.

In another aspect, the present application also provides a motorcycle including a body (not shown), an engine (not shown), an air cleaner (not shown), and a cylinder head cover as described above. The engine is arranged on the vehicle body and provides power for the vehicle body. The cylinder head cover is arranged on a crankcase of the engine to separate engine oil in an oil-gas mixture discharged by the engine, so as to reduce the content of the engine oil in waste gas. The exhaust port 101 is provided with an air pipe joint 150, the air pipe joint 150 communicates with the air filter through an air pipe (not shown), and exhaust gas enters the air filter through the exhaust port 101, is filtered by the air filter, and is discharged into the air. By arranging the oil baffle 400 on the ventilation sheet 300, the amount of engine oil entering the air filter is greatly reduced, the maintenance cost of the motorcycle is reduced, and the commodity competitive advantage of the motorcycle is improved.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims

1. A cylinder head cover, the cylinder head cover comprising:

the baffle piece is convexly arranged on the inner surface of the cover body;

2. The cylinder head cover of claim 1, wherein an edge of the oil baffle is provided with a chamfer.

3. The cylinder head cover according to claim 1, wherein the baffle member includes a first baffle wall and a second baffle wall, one end of the first baffle wall is connected to the cover body, one end of the second baffle wall is connected to the cover body, one end of the first baffle wall connected to the cover body and one end of the second baffle wall connected to the cover body are located on both sides of the exhaust port, respectively, so that the exhaust gas is discharged through the exhaust port after the oil-gas mixture is separated from the oil-gas separation chamber.

4. A cylinder head cover according to claim 3, wherein the barrier further comprises a third barrier wall disposed in spaced relation between an end of the first barrier wall remote from the exhaust port and an end of the second barrier wall remote from the exhaust port, the oil and gas inlet including a first inlet formed between the first barrier wall and the third barrier wall and a second inlet formed between the second barrier wall and the third barrier wall.

5. The cylinder head cover of claim 4, wherein the baffle further comprises a fourth baffle wall, the fourth baffle wall is arc-shaped, the fourth baffle wall is disposed on the cover body and corresponds to the first inlet, a middle portion of the fourth baffle wall is close to the first inlet, and two ends of the fourth baffle wall are far away from the first inlet.

6. The cylinder head cover of claim 1, wherein the baffle further comprises a rib comprising a plurality of ribs, the plurality of ribs being spaced apart and extending toward the baffle, the rib for forming an oil-gas separation channel with the baffle within the oil-gas separation cavity to adhere to engine oil in the oil-gas mixture.

7. The cylinder head cover according to claim 6, wherein the cover body is provided with a through hole, the ventilation sheet is provided with an observation hole, the observation hole corresponds to the through hole, the through hole upper cover is provided with an eyepiece, and the eyepiece is opposite to the observation hole.

8. The cylinder head cover of claim 7, wherein the perforations are located on the rib.

9. A cylinder head cover according to claim 3, wherein the cover body is provided with two mounting holes, the two mounting holes being diagonally arranged, and a portion of the first or second baffle wall being disposed around a portion of an edge of at least one of the mounting holes.

10. A motorcycle comprising a vehicle body, an engine, an air cleaner, and the cylinder head cover according to any one of claims 1 to 9, wherein the engine is provided on the vehicle body, the cylinder head cover is provided on the engine, and the exhaust port communicates with the air cleaner.