Cylinder cover, engine and vehicle

Abstract

The utility model discloses a cylinder cover, an engine and a vehicle, an oil pool, a camshaft bearing seat, a first camshaft bearing hole, a second camshaft bearing hole and an oil return channel are formed on the cylinder cover, and the oil pool is located on one side of the camshaft bearing seat. The first cam bearing hole and the second cam bearing hole are located on the other side of the cam shaft bearing seat and are sequentially arranged in the direction away from the oil pool, the diameter of the second cam bearing hole is larger than that of the first cam bearing hole, and the oil return channel is obliquely arranged below the cam shaft bearing seat. An inlet of the oil return channel is formed in the first cam bearing hole, and an outlet of the oil return channel is communicated with the oil pool. Therefore, through the arrangement of the oil return channel, oil flowing out of the camshaft bearing seat can flow back to the oil cavity, the space of an engine can be saved, the weight of the cylinder cover and the machining difficulty are reduced, and therefore the economic practicability and the space arrangement reasonability of the cylinder cover are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a cylinder head, an engine and a vehicle. Background Art

[0002] In the related art, the internal structure of the cylinder head camshaft cavity is complex. In order to achieve a certain function, some positions form a nearly closed cavity, which prevents the oil flowing out of the cylinder head camshaft bearing seat from returning to the oil cavity, thereby causing oil leakage in the cylinder head and even causing the oil seal to fall off. If the oil return hole is not designed, the cylinder head structure needs to be specially designed, which greatly increases the total amount of the cylinder head, complicates the casting machine, and increases the manufacturing cost. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a cylinder head, which can make the oil flowing out of the camshaft bearing seat return to the oil chamber, and can also save engine space, reduce the weight of the cylinder head and the difficulty of processing.

[0004] The utility model further provides an engine.

[0005] The utility model further provides a vehicle.

[0006] According to the cylinder head of the first aspect of the utility model, the cylinder head is formed with an oil pool, a camshaft bearing seat, a first cam bearing hole, a second cam bearing hole and an oil return channel, the oil pool is located on one side of the camshaft bearing seat, the first cam bearing hole and the second cam bearing hole are located on the other side of the camshaft bearing seat and are arranged sequentially in a direction away from the oil pool, the diameter of the second cam bearing hole is larger than the diameter of the first cam bearing hole, the oil return channel is obliquely arranged below the camshaft bearing seat, the inlet of the oil return channel is arranged at the first cam bearing hole, and the outlet of the oil return channel is connected to the oil pool.

[0007] Therefore, by setting up the oil return channel, the oil flowing out of the camshaft bearing seat can be returned to the oil chamber, which can also save engine space, reduce the weight and processing difficulty of the cylinder head, thereby improving the economic practicality and rationality of the spatial layout of the cylinder head.

[0008] In some examples of the present invention, the diameter of the first cam bearing hole is a, the diameter of the second cam bearing hole is b, the diameter of the oil return channel is c, and a, b and c satisfy the relationship: 0.75≤(ba) / 2c≤1.75.

[0009] In some examples of the present invention, a, b and c satisfy the relationship: a thrust surface is provided on one axial side of the camshaft bearing seat.

[0010] In some examples of the present invention, the angle between the center line of the oil return channel and the horizontal plane is α, and α satisfies the relationship: 6°≤α≤15°.

[0011] An engine according to a second aspect of the utility model comprises the above-mentioned cylinder head.

[0012] In some examples of the utility model, the engine further includes: a cylinder head cover, which is arranged at the upper end of the cylinder head; wherein the cylinder head is formed with a main oil channel and a first oil supply channel, and the cylinder head cover is formed with a second oil supply channel and an OCV valve mounting hole, the first oil supply channel is respectively connected to the main oil channel and the second oil supply channel, and the second oil supply channel is connected to the OCV valve mounting hole.

[0013] In some examples of the present invention, the angle between the first oil supply channel and the horizontal plane is β, the angle between the second oil supply channel and the horizontal plane is γ, and β and γ satisfy: 0.625≤β / γ≤1.28.

[0014] In some examples of the present invention, the diameter of the first oil supply channel is d, the diameter of the second oil supply channel is e, and d and e satisfy the relationship: 0.8e≤d≤1.75e; and / or

[0015] The cylinder head cover is formed with a connecting hole, which is communicated with the first oil supply passage and the second oil supply passage respectively. The diameter of the connecting hole is f, and e and f satisfy the relationship 1.5e≤f≤3e.

[0016] In some examples of the present invention, a pre-combustion chamber injector mounting hole, a pre-combustion chamber spark plug mounting hole, a cam bearing seat mounting hole and a cylinder head cover mounting hole are formed on the cylinder head cover, and the projections of the center of the pre-combustion chamber injector mounting hole, the center of the pre-combustion chamber spark plug mounting hole and the center of the cam bearing seat mounting hole corresponding to the same camshaft bearing seat in the horizontal plane are located in the same straight line, and the projection of the center of the cylinder head cover mounting hole in the horizontal plane is located on one side of the straight line.

[0017] A vehicle according to a third aspect of the utility model comprises the above-mentioned engine.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 is a schematic diagram of a first oil supply channel according to an embodiment of the utility model;

[0021] Figure 2 is a schematic diagram of a second oil supply passage according to an embodiment of the utility model;

[0022] Figure 3 It is a partial structural schematic diagram of a cylinder head according to an embodiment of the utility model;

[0023] Figure 4 is another partial structural schematic diagram of a cylinder head according to an embodiment of the utility model;

[0024] Figure 5 It is a partial structural schematic diagram of a cylinder head cover according to an embodiment of the utility model;

[0025] Figure 6 It is another partial structural schematic diagram of the cylinder head cover according to an embodiment of the utility model.

[0026] Reference numerals:

[0027] 100, cylinder head; 200, cylinder head cover;

[0028] 10. Oil pool; 11. Inlet; 20. Camshaft bearing seat; 21. Thrust surface;

[0029] 30. First cam bearing hole; 40. Second cam bearing hole; 50. Oil return passage;

[0030] 60, main oil channel; 70, first oil supply channel; 201, second oil supply channel;

[0031] 202, OCV valve mounting hole; 203, connection hole; 301, pre-combustion chamber injector mounting hole;

[0032] 302, pre-combustion chamber spark plug mounting hole; 303, cam bearing seat mounting hole; 304, cylinder head cover mounting hole. DETAILED DESCRIPTION

[0033] Embodiments of the present invention are described in detail below, and the embodiments described with reference to the accompanying drawings are exemplary.

[0034] Reference below Figure 1-Figure 6 The cylinder head 100 according to the embodiment of the utility model can make the oil flowing out of the camshaft bearing seat 20 return to the oil pool 10, and can also save engine space, reduce the weight of the cylinder head 100 and reduce the difficulty of processing.

[0035] Combination Figure 3 and Figure 4As shown, according to the cylinder head 100 of the first embodiment of the utility model, the cylinder head 100 is formed with an oil pool 10, a camshaft bearing seat 20, a first cam bearing hole 30, a second cam bearing hole 40 and an oil return channel 50. The camshaft bearing seat 20 is a mounting and supporting component of the camshaft, and its main function is to ensure that the camshaft can be correctly installed and rotate normally and stably. The first cam bearing hole 30 and the second cam bearing hole 40 are mainly used to install and support the camshaft bearing. The oil return channel 50 can provide a flow channel for the oil (such as lubricating oil) flowing out of the camshaft bearing seat 20 to return to the oil pool 10.

[0036] Specifically, the oil pool 10 is located on one side of the camshaft bearing seat 20, the first cam bearing hole 30 and the second cam bearing hole 40 are located on the other side of the camshaft bearing seat 20, and the first cam bearing hole 30 and the second cam bearing hole 40 are arranged sequentially in the direction away from the oil pool 10, the diameter of the second cam bearing hole 40 is larger than the diameter of the first cam bearing hole 30, the return oil channel 50 is obliquely arranged below the camshaft bearing seat 20, the inlet 11 of the return oil channel 50 is arranged in the first cam bearing hole 30, and the outlet of the return oil channel 50 is connected to the oil pool 10.

[0037] Among them, the first cam bearing hole 30 and the second cam bearing hole 40 are arranged sequentially in the direction away from the oil pool 10, and the diameter of the second cam bearing hole 40 is larger than the diameter of the first cam bearing hole 30. In this way, the cylinder head 100 extending along its own axial direction toward the other side edge can achieve a step-by-step processing effect from high to low, thereby avoiding the problem of excessive local stress; it can also be beneficial to the assembly and disassembly of bearings in sequence according to specifications, thereby improving the rationality of their arrangement.

[0038] In addition, since the oil pool 10 is located on one side of the camshaft bearing seat 20, and the first cam bearing hole 30 and the second cam bearing hole 40 are located on the other side of the camshaft bearing seat 20, the excess oil flowing out of the camshaft bearing seat 20 (the area of ​​the camshaft bearing seat 20 near the first cam bearing hole 30 and the second cam bearing hole 40) will first flow to the first cam bearing hole 30 and the second cam bearing hole 40, and the oil return channel 50 can guide the oil flowing to the inlet 11 to the outlet connected to the oil pool 10, thereby smoothly achieving the oil return effect; since the oil return channel 50 is arranged inside the cylinder head 100, it is also possible to save the space occupied by arranging the oil return channel 50 separately outside the cylinder head 100, and it is also possible to reduce the weight of the cylinder head 100, thereby improving the practicality of the cylinder head 100.

[0039] In addition, the oil return channel 50 is inclined, which can increase the flow energy of the oil in the oil return channel 50, thereby increasing the oil return speed of the oil and further improving the oil return effect.

[0040] Furthermore, if the oil return channel 50 is not designed, the cylinder head 100 needs to be specially designed, which will increase the total amount of the cylinder head 100, and the casting machine will be more complicated, increasing the manufacturing cost. The oil return channel 50 is machined, which can reduce the casting difficulty, and can also effectively reduce the risk of oil leakage caused by casting defects at the oil return channel 50, and also save the later maintenance cost and time.

[0041] Therefore, by setting up the oil return channel 50, the oil flowing out of the camshaft bearing seat 20 can be returned to the oil pool 10, which can also save engine space, reduce the weight and processing difficulty of the cylinder head 100, thereby improving the economic practicality and rationality of the spatial layout of the cylinder head 100.

[0042] According to some optional embodiments of the present invention, combined with Figure 3 and Figure 4 As shown, the diameter of the first cam bearing hole 30 is a, the diameter of the second cam bearing hole 40 is b, the diameter of the oil return channel 50 is c, and a, b and c satisfy the relationship: 0.75≤(ba) / 2c≤1.75.

[0043] In detail, there is a parameter relationship between the diameter a of the first cam bearing hole 30, the diameter b of the second cam bearing hole 40 and the diameter c of the oil return passage 50, so that the size range of the three can be limited according to the relationship, thereby improving the scientific nature of the parameters between a, b and c. The cylinder head 100 that satisfies the relationship can avoid the oil return passage 50 from interfering with and damaging the inner wall structure of the first cam bearing hole 30 and the second cam bearing hole 40 during machining, and can also reduce the risk of oil flowing out of the first cam bearing hole 30 and the second cam bearing hole 40. For example, (ba) / 2c can be 0.75, 0.8, 1, 1.25 and 1.75, but is not limited thereto.

[0044] Specifically, combined Figure 3 and Figure 4 As shown, a, b and c satisfy the relationship: 4.5mm≤(ba) / 2≤7mm, 4mm≤c≤6mm. Among them, the diameter of the oil return channel 50 is relatively small, so that on the basis of ensuring the structural strength of the cylinder head 100, it can also provide a return channel for the oil, thereby effectively solving the problem of oil leakage of the cylinder head 100; at the same time, it also achieves the effect of reducing the friction between the camshaft and the camshaft bearing, and can also avoid the risk of abnormal decrease in oil viscosity at the camshaft bearing causing the oil to be scrapped prematurely.

[0045] In addition, there is a parameter relationship between the diameter a of the first cam bearing hole 30 and the diameter b of the second cam bearing hole 40, so that the size range of the two can be limited according to the relationship, thereby improving the scientific nature of the parameters between a and b. The cylinder head 100 that satisfies the relationship can ensure the structural strength of the first cam bearing hole 30 and the second cam bearing hole 40 on the one hand, and can also ensure that the return oil channel 50 smoothly forms a communication relationship with the first cam bearing hole 30 on the other hand. For example, (ba) / 2 can be 4.5mm, 5mm, 6mm and 7mm, and c can be 4mm, 5mm and 6mm, but is not limited thereto.

[0046] Furthermore, combined with Figure 3 As shown, a thrust surface 21 is provided on one axial side of the camshaft bearing seat 20. In the axial direction, two adjacent camshaft bearing seats 20 are provided with a thrust surface 21 on one axial side, so that the camshaft can be limited in the axial direction, thereby ensuring the relative position stability of the camshaft.

[0047] According to some optional embodiments of the utility model, the angle between the center line of the oil return channel 50 and the horizontal plane is α, and α satisfies the relationship: 6°≤α≤15°. In detail, in the horizontal direction, since the oil pool 10 and the first cam bearing hole 30 and the second cam bearing hole 40 are respectively located on both sides of the oil return channel 50, the angle α between the center line and the horizontal plane is small, which can increase the kinetic potential energy of the oil in the process of flowing from the inlet 11 to the outlet on the one hand, and shorten the channel path connecting the oil pool 10 and the first cam bearing hole 30 on the other hand, thereby achieving the effect of both increasing the oil return speed and reducing the oil flow path. For example, the angle α between the center line of the oil return channel 50 and the horizontal plane can be 6°, 8°, 10°, 12° and 15°, but is not limited thereto.

[0048] The engine according to the embodiment of the second aspect of the utility model includes the cylinder head 100 of the above-mentioned embodiment. The engine with the cylinder head 100 can allow the oil flowing out of the camshaft bearing seat 20 to flow back to the oil pool 10, and can also save its internal space, reduce the overall weight and processing and manufacturing difficulty, thereby improving the economic practicality and rationality of the space layout of the engine.

[0049] According to some optional embodiments of the present invention, combined with Figure 1 and Figure 2As shown, the engine also includes a cylinder head cover 200, which is arranged at the upper end of the cylinder head 100; wherein the cylinder head 100 is formed with a main oil channel 60 and a first oil supply channel 70, and the cylinder head cover 200 is formed with a second oil supply channel 201 and an OCV valve mounting hole 202, the first oil supply channel 70 is respectively connected to the main oil channel 60 and the second oil supply channel 201, and the second oil supply channel 201 is connected to the OCV valve mounting hole 202.

[0050] In detail, the cylinder head cover 200 is mainly used to cover and seal the cylinder head 100, keep the engine oil inside, and isolate pollutants such as dirt and moisture outside. After the cylinder head 100 and the cylinder head cover 200 are assembled, the first oil supply channel 70 and the second oil supply channel 201 on the cylinder head cover 200 are connected to each other, so that the main oil channel 60, the first oil supply channel 70, the second oil supply channel 201 and the OCV valve mounting hole 202 can form an oil flow channel that is connected in sequence, thereby achieving the effect of supplying oil (such as lubricating oil) from the main oil channel 60 on the cylinder body to the OCV valve mounting hole 202 on the cylinder head cover 200. Among them, the arrangement of the oil flow channel can save the space occupied by arranging the channel separately outside the cylinder head 100 or the cylinder head cover 200, and can also reduce the weight of the cylinder head 100 and the cylinder head cover 200, thereby improving the rationality of the space arrangement of the engine.

[0051] In addition, the axial direction of the OCV valve mounting hole 202 is horizontal, and an oil circuit connected to the oil inlet and oil outlet of the camshaft journal is provided therein. The oil inlet and oil outlet of the camshaft journal are respectively connected to the VVT, and the VVT ​​can be controlled under the action of the OCV valve.

[0052] Specifically, combined Figure 1 and Figure 2 As shown, the angle between the first oil supply channel 70 and the horizontal plane is β, and the angle between the second oil supply channel 201 and the horizontal plane is γ, and β and γ satisfy: 0.625≤β / γ≤1.28. There is a parameter relationship associated with each other between the angle β between the first oil supply channel 70 and the horizontal plane and the angle γ between the second oil supply channel 201 and the horizontal plane, so that the size range of the two can be limited according to the relationship, thereby improving the scientific nature of the parameters between β and γ.

[0053] In addition, the angle β between the first oil supply passage 70 and the horizontal plane and the angle γ between the second oil supply passage 201 and the horizontal plane are close, so that the inclination of the first oil supply passage 70 and the second oil supply passage 201 can be close, so that too much structural space inside the cylinder head 100 and the cylinder head cover 200 can be avoided, and the spatial arrangement of the first oil supply passage 70 and the second oil supply passage 201 can be more neat and orderly. For example, β / γ can be 0.625, 0.8, 1 and 1.28, but is not limited thereto.

[0054] Furthermore, combined with Figure 1 and Figure 2 As shown, the diameter of the first oil supply channel 70 is d, the diameter of the second oil supply channel 201 is e, and d and e satisfy the relationship: 0.8e≤d≤1.75e. There is a parameter relationship associated with each other between the diameter d of the first oil supply channel 70 and the diameter e of the second oil supply channel 201, so that the size range of the two can be limited according to the relationship, thereby improving the scientific nature of the parameters between d and e.

[0055] In addition, the diameters of the first oil supply passage 70 and the second oil supply passage 201 satisfying the relationship are relatively close, so that the risk of weakening the structural strength of the cylinder head 100 and the cylinder head cover 200 due to machining unnecessary passage space can be avoided while ensuring that the oil flows smoothly in the first oil supply passage 70 and the second oil supply passage 201. For example, the diameter d of the first oil supply passage 70 can be 0.8e, 1e, 1.5e and 1.75e, but is not limited thereto.

[0056] Specifically, combined Figure 1 and Figure 2 As shown, the cylinder head cover 200 is formed with a connecting hole 203, which is connected to the first oil supply channel 70 and the second oil supply channel 201 respectively. The diameter of the connecting hole 203 is f, and the relationship between e and f satisfies 1.5e≤f≤3e.

[0057] The connection hole 203 on the cylinder head cover 200 is connected to the inlet of the second oil supply channel 201, and the diameter of the connection hole 203 is larger than the inlet diameter of the second oil supply channel 201, so that the channel cross-sectional area of ​​the oil in the process of supplying to the OCV valve installation hole 202 can be reduced, thereby increasing the oil flow pressure, and then the oil can achieve the effect of quickly flowing into the OCV valve installation hole 202. For example, the diameter f of the connection hole 203 can be 1.5e, 2e, 2.5e and 3e, but is not limited thereto.

[0058] In addition, the smaller the angle β between the first oil supply channel 70 and the horizontal plane, the larger the diameter of the opening of the first oil supply channel 70 connecting the connecting hole 203, which will result in a larger diameter of the connecting hole 203. In order to ensure that the oil in the first oil supply channel 70 flows into the connecting hole 203, the angle β between the first oil supply channel 70 and the horizontal plane is relatively large (60°≤β≤90°).

[0059] According to some optional embodiments of the present invention, combined with Figure 5 and Figure 6As shown, the cylinder head cover 200 is formed with a pre-combustion chamber injector mounting hole 301, a pre-combustion chamber spark plug mounting hole 302, a cam bearing seat mounting hole 303 and a cylinder head cover mounting hole 304. This can improve the integration effect of the cylinder head cover 200, thereby improving assembly and production efficiency.

[0060] Specifically, the projections of the center of the pre-combustion chamber injector mounting hole 301, the center of the pre-combustion chamber spark plug mounting hole 302 and the center of the cam bearing seat mounting hole 303 corresponding to the same camshaft bearing seat 20 on the horizontal plane are located in the same straight line, and the projection of the center of the cylinder head cover mounting hole 304 on the horizontal plane is located on one side of the straight line.

[0061] Among them, Figure 5 and Figure 6 The surface shown in is defined as a horizontal plane, and the projections of the center of the pre-combustion chamber injector mounting hole 301, the center of the pre-combustion chamber spark plug mounting hole 302 and the center of the cam bearing seat mounting hole 303 corresponding only to the same camshaft bearing seat 20 to the horizontal plane are located on the same straight line (the lines connecting the centers are in a collinear relationship), and the projection of the center of the cylinder head cover mounting hole 304 to the horizontal plane is located on one side of the straight line (in a staggered relationship). Such an arrangement can rationalize the distribution of bolts on the cylinder head cover 200, thereby improving the pressure transmission effect of the bolts and reducing the risk of oil leakage.

[0062] The vehicle according to the third aspect of the embodiment of the utility model includes the engine of the above embodiment. A vehicle with such an engine can solve the oil leakage problem of the cylinder head 100 caused by the oil flowing out of the camshaft bearing seat 20 on the cylinder head 100 being unable to return to the oil pool 10, and can also solve the problem that the oil supply channel of the cylinder head 100 is difficult to design due to insufficient space.

[0063] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0064] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0065] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0066] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A cylinder head, characterized in that: The cylinder head is formed with an oil pool, a camshaft bearing seat, a first cam bearing hole, a second cam bearing hole and an oil return channel, the oil pool is located on one side of the camshaft bearing seat, the first cam bearing hole and the second cam bearing hole are located on the other side of the camshaft bearing seat and are arranged sequentially in a direction away from the oil pool, the diameter of the second cam bearing hole is larger than the diameter of the first cam bearing hole, the oil return channel is obliquely arranged below the camshaft bearing seat, the inlet of the oil return channel is arranged at the first cam bearing hole, and the outlet of the oil return channel is communicated with the oil pool.

2. The cylinder head according to claim 1, characterized in that: The diameter of the first cam bearing hole is a, the diameter of the second cam bearing hole is b, the diameter of the oil return passage is c, and a, b and c satisfy the relationship: 0.75≤(ba) / 2c≤1.

75.

3. The cylinder head according to claim 2, characterized in that: A thrust surface is provided on one axial side of the camshaft bearing seat.

4. The cylinder head according to claim 1, characterized in that: The angle between the center line of the oil return channel and the horizontal plane is α, and α satisfies the relationship: 6°≤α≤15°.

5. An engine, characterized in that: include: The cylinder head according to any one of claims 1 to 4.

6. The engine according to claim 5, characterized in that Also includes: A cylinder head cover, the cylinder head cover is arranged at the upper end of the cylinder head; Among them, the cylinder head is formed with a main oil channel and a first oil supply channel, the cylinder head cover is formed with a second oil supply channel and an OCV valve mounting hole, the first oil supply channel is connected with the main oil channel and the second oil supply channel respectively, and the second oil supply channel is connected with the OCV valve mounting hole.

7. The engine according to claim 6, characterized in that The included angle between the first oil supply channel and the horizontal plane is β, the included angle between the second oil supply channel and the horizontal plane is γ, and β and γ satisfy the following: 0.625≤β / γ≤1.

28.

8. The engine according to claim 6, characterized in that The diameter of the first oil supply channel is d, the diameter of the second oil supply channel is e, d and e satisfy the relationship: 0.8e≤d≤1.75e; and / or The cylinder head cover is formed with a connecting hole, which is communicated with the first oil supply passage and the second oil supply passage respectively. The diameter of the connecting hole is f, and e and f satisfy the relationship 1.5e≤f≤3e.

9. The engine according to claim 6, characterized in that The cylinder head cover is formed with a pre-combustion chamber injector mounting hole, a pre-combustion chamber spark plug mounting hole, a cam bearing seat mounting hole and a cylinder head cover mounting hole, the projections of the center of the pre-combustion chamber injector mounting hole, the center of the pre-combustion chamber spark plug mounting hole and the center of the cam bearing seat mounting hole corresponding to the same camshaft bearing seat on the horizontal plane are located in the same straight line, and the projection of the center of the cylinder head cover mounting hole on the horizontal plane is located on one side of the straight line.

10. A vehicle, characterized in that: include: The engine according to any one of claims 5 to 9.

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