Cylinder head cover and engine

Abstract

This utility model relates to the field of engine technology. It discloses a cylinder head cover and an engine. The cylinder head cover includes a cover body with a bottom surface facing the cylinder head. The cover body has a cam bearing hole, a fastener mounting hole located axially outside the cam bearing hole, and a glue-receiving groove located on the side of the fastener mounting hole away from the cam bearing hole. The glue-receiving groove is located on the bottom surface of the cover. Therefore, on the one hand, it reduces the probability of glue overflowing into the cam bearing hole, improving the engine's operational stability and reliability. On the other hand, the planar distance between the fastener mounting hole and the cam bearing hole is no longer a limiting factor for setting the glue-receiving groove, facilitating its placement while reducing the span of the fasteners. This improves the sealing effect of the sealing surfaces, enhances the sealing performance, and facilitates a lighter and more compact engine design, reducing fuel consumption and improving fuel economy.

Description

Technical Field

[0001] This utility model relates to the field of engine technology, and in particular to a cylinder head cover and an engine. Background Technology

[0002] As a sealing structure at the top of the engine, the cylinder head cover is connected to the cylinder head and timing cover in a sealed manner, which ensures the overall sealing of the engine and protects the internal components of the cylinder head from external interference.

[0003] In related technologies, the sealing method of the cylinder head cover is to set a glue-containing groove on the sealing mating surface of the cylinder head cover and the cylinder head and timing cover, and to apply sealant (such as silicone rubber) into the glue-containing groove for sealing. It has the technical characteristics of simple structure and high sealing reliability.

[0004] However, the sealant in the sealant groove can easily enter the camshaft bearing hole of the cylinder head cover, which can lead to camshaft wear, seizure, and engine failure. Utility Model Content

[0005] This utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of this utility model is to provide a cylinder head cover that can reduce the probability of sealant entering the camshaft bearing bore, extend the service life of the camshaft and camshaft bearings, reduce the probability of camshaft seizure, and improve the working stability and reliability of the engine.

[0006] This utility model further proposes an engine using the above-mentioned cylinder head cover.

[0007] In a first aspect, the present invention provides a cylinder head cover, the cylinder head cover being disposed on a cylinder head, the cylinder head cover comprising: a cover body having a cover bottom surface facing the cylinder head, the cover body having a cam bearing hole, a fastener mounting hole located axially outside the cam bearing hole, and an adhesive groove located on the side of the fastener mounting hole away from the cam bearing hole, the adhesive groove being located on the bottom surface of the cover.

[0008] According to the cylinder head cover of this utility model embodiment, by placing the glue-containing groove outside the fastener mounting hole, on the one hand, the distance between the glue-containing groove and the cam bearing hole can be increased, reducing the probability of glue overflowing into the cam bearing hole and improving the working stability and reliability of the engine. On the other hand, the planar distance between the fastener mounting hole and the cam bearing hole is no longer a limiting factor for setting the glue-containing groove, which facilitates the layout of the glue-containing groove and reduces the span of the fastener, thereby improving the sealing effect of the sealing surface, improving the sealing effect, and facilitating the lightweight and compact design of the engine, reducing fuel consumption and improving fuel economy.

[0009] According to some embodiments of the present invention, a mounting end face is provided on the side of the cover body away from the bottom surface of the cover. The mounting end face cooperates with the head of the fastener, and the mounting end face is constructed as a mirror mounting surface.

[0010] According to some embodiments of this utility model, the surface roughness of the mounting end face satisfies Ra≤3.2μm and Rz≤10μm.

[0011] According to some embodiments of the present invention, the cover body also has a sealing groove, which is formed on the bottom surface of the cover, recessed away from the cylinder head, and communicates with the fastener mounting hole.

[0012] According to some embodiments of the present invention, the sealing groove is spaced apart from the side wall of the cover body.

[0013] According to some embodiments of the present invention, there are multiple sealing grooves, which are arranged around the fastener mounting hole, and the total length of the multiple sealing grooves is greater than the diameter of the fastener mounting hole.

[0014] According to some embodiments of this utility model, the height of the sealing groove is H1, the width is D1, the cross-sectional area of ​​the adhesive groove is S1, and H1*D1≥S1 is satisfied.

[0015] According to some embodiments of this utility model, the diameter of the fastener mounting hole is D2, and satisfies: 1mm≤H1≤D2.

[0016] According to some embodiments of this utility model, 1mm≤D1≤4mm.

[0017] Secondly, this utility model discloses an engine, which includes: the cylinder head cover in the above embodiment.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of a cylinder head cover according to an embodiment of the present utility model; Figure 2 yes Figure 1 Schematic cross-sectional view of midline AA; Figure 3 This is a schematic diagram of the fit between the cylinder head cover and the fastener according to an embodiment of the present utility model.

[0020] Figure label: Cylinder head cover 100, fasteners 200 Cover body 10, cam bearing hole 11, fastener mounting hole 12, adhesive groove 13, sealing groove 14 Bottom surface a of the cover, mounting end surface b. The height of the sealing groove is H1, the width of the sealing groove is D1, and the diameter of the fastener mounting hole is D2. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this invention are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or accompanying drawings of this invention are used to distinguish different objects, not to describe a specific order or hierarchy.

[0023] In this invention, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "attachment," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] In this invention, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this invention, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0026] In the embodiments of this utility model, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this utility model shown in the drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this utility model.

[0027] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0028] In the description of this utility model, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0029] In the description of this utility model, the terms "above", "over" and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0030] In this utility model, "multiple" refers to two or more (including two).

[0031] As a sealing structure at the top of the engine, the cylinder head cover is connected to the cylinder head and timing cover in a sealed manner, which ensures the overall sealing of the engine and protects the internal components of the cylinder head from external interference.

[0032] In related technologies, the sealing method of the cylinder head cover is to set a glue-containing groove in the sealing joint area between the cylinder head cover and the cylinder head and timing cover, and to apply sealant (such as silicone rubber) in the glue-containing groove for sealing. It has the technical characteristics of simple structure and high sealing reliability.

[0033] However, the sealant groove is close to the camshaft bearing bore, which makes it easy for the sealant in the sealant groove to enter the camshaft bearing bore of the cylinder head cover. The camshaft journal rotates and engages with the camshaft bearing in the camshaft bearing bore. Since the sealant has a high viscosity, the sealant entering the camshaft bearing bore will cause the camshaft to wear, and then cause the camshaft to rotate stuck or even lock up and not rotate (i.e., the camshaft seizure phenomenon), which will eventually lead to engine failure.

[0034] Based on this, the present invention positions the adhesive groove on the axial outer side of the fastener mounting hole, that is, on the side of the fastener mounting hole away from the cam bearing hole. The diameter of the fastener mounting hole exceeds 2mm, which reduces the probability of sealant entering the cam bearing hole, thereby improving the working stability and reliability of the cam bearing and cam, reducing the probability of bearing seizure, thus improving the working stability and reliability of the engine, and reducing the wear of the cam and cam bearing, effectively extending the service life of the cam and cam bearing.

[0035] It should be noted that the width of the sealant groove is generally 1mm-1.5mm. For existing technology where the sealant groove is located between the fastener mounting hole and the camshaft bearing hole, the distance between the sealant groove and the fastener mounting hole, as well as the distance between the sealant groove and the fastener mounting hole, both need to be at least 2mm. This means that the planar distance between the fastener mounting hole and the camshaft bearing hole needs to be no less than 5.5mm. However, when the planar distance between the fastener mounting hole and the camshaft bearing hole is insufficient, the probability of the sealant in the sealant groove entering the camshaft bearing hole is higher, leading to a higher probability of camshaft wear, camshaft seizure, and engine failure.

[0036] In this way, the present invention can not only reduce the probability of sealant entering the cam bearing hole, but also improve the sealing effect when the planar distance between the fastener mounting hole and the cam bearing hole is insufficient. The technical means of the present invention embodiment can be used to achieve the sealing between the cylinder head cover and the cylinder head and timing cover.

[0037] In other words, the cylinder head cover of this utility model embodiment can solve the technical problem that insufficient planar distance between the fastener mounting holes and the camshaft bearing holes prevents the installation of adhesive grooves, thus leading to sealing difficulties. Furthermore, while ensuring the sealing performance of the sealing surfaces between the cylinder head cover and the cylinder head and timing cover meets sealing requirements, it further effectively prevents sealant from entering the camshaft bearing holes, thereby improving the engine's operational stability and reliability. In addition, it can reduce the span between the cam bearing hole and the fastener mounting hole, which can increase the surface pressure of the sealing mating surface, thereby reducing the opening of the mating surface, improving the sealing performance of the sealing mating surface, making the product structure more compact and lighter, effectively reducing the weight of the engine and the whole vehicle, thereby reducing the fuel consumption of the whole vehicle and improving the fuel economy and competitiveness of the whole vehicle.

[0038] The following is for reference. Figures 1-3 This invention describes a cylinder head cover 100 and an engine according to an embodiment of the present invention.

[0039] like Figure 1 , Figure 2 as well as Figure 3 As shown, this utility model provides a cylinder head cover 100, which is disposed on the cylinder head. The cylinder head cover 100 includes: a cover body 10, the cover body 10 having a cover bottom surface a facing the cylinder head, and a cam bearing hole 11, a fastener mounting hole 12 located axially outside the cam bearing hole 11, and a glue-receiving groove 13 located on the side of the fastener mounting hole 12 away from the cam bearing hole 11. The glue-receiving groove 13 is located on the cover bottom surface a.

[0040] Specifically, the top surface of the cylinder head facing the cylinder head cover 100 is opposite to the bottom surface a of the cylinder head cover 100. The cylinder head can have a cam cavity (accommodating the camshaft) and a cam bearing cavity for fixing the cam bearing. The cylinder head cover 100 is opened on the cylinder head and has at least a cam bearing hole 11 opposite to the cam bearing cavity, which can be used to accommodate the cam bearing. Then, the cylinder head cover 100 is fastened to the cylinder head by fasteners 200 passing through the fastener mounting holes 12 on the cylinder head cover 100, and the bottom surface a of the cover and the top surface of the cylinder head form a sealed joint area. The top surface of the cylinder head and the bottom surface a of the cover form two sealed joint surfaces.

[0041] Furthermore, the sealant can be contained in the sealant groove 13 formed on the bottom surface a of the cover to achieve a seal between the top surface of the cylinder head and the bottom surface a of the cover. By positioning the sealant groove 13 on the side away from the fastener mounting hole 12 and the cam bearing hole 11, the distance between the sealant groove 13 and the cam bearing hole 11 can be increased. This reduces the probability of the sealant in the sealant groove 13 entering the cam bearing hole 11 and reduces the probability of the high-viscosity sealant affecting the cam bearing located in the cam bearing hole 11. This can improve the working stability and reliability of the cam bearing and camshaft, reduce the probability of wear, extend service life, and improve the working stability and reliability of the engine.

[0042] It is understandable that the glue-receiving groove 13 is located outside the fastener mounting hole 12, so that the distance between the glue-receiving groove 13 and the cam bearing hole 11 is at least greater than the diameter of the fastener mounting hole 12. This increases the distance between the glue-receiving groove 13 and the cam bearing hole 11, reducing the probability of sealant overflowing into the cam bearing hole 11. At the same time, the size of the planar distance between the cam bearing hole 11 and the fastener mounting hole 12 does not affect the layout of the glue-receiving groove 13. This solves the technical problem of difficulty in laying the glue-receiving groove 13 due to insufficient planar distance between the cam bearing hole 11 and the fastener mounting hole 12. It also allows the distance between the cam bearing hole 11 and the fastener mounting hole 12 to be set smaller, corresponding to a smaller span between the fasteners 200. It can also increase the surface pressure of the sealing mating surface, reduce the opening of the sealing mating area, improve the mating effect between the sealing mating surfaces (cylinder head top surface and cover bottom surface a), improve sealing performance, and achieve a compact and lightweight design, reducing engine weight, reducing fuel consumption, and improving fuel economy.

[0043] According to the cylinder head cover 100 of this utility model embodiment, by positioning the glue-containing groove 13 outside the fastener mounting hole 12, on the one hand, the distance between the glue-containing groove 13 and the cam bearing hole 11 can be increased, reducing the probability of glue overflowing into the cam bearing hole 11, and improving the working stability and reliability of the engine. On the other hand, the planar distance between the fastener mounting hole 12 and the cam bearing hole 11 is no longer a limiting factor for setting the glue-containing groove 13, which facilitates the layout of the glue-containing groove 13 and reduces the span of the fastener 200, thereby improving the bonding effect of the two sealing surfaces, improving the sealing effect, and facilitating the lightweight and compact design of the engine, which can reduce fuel consumption and improve fuel economy.

[0044] Combination Figure 2 and Figure 3 As shown, according to some embodiments of the present invention, the cover body 10 is provided with a mounting end face b on the side away from the bottom surface a of the cover. The mounting end face b cooperates with the head of the fastener 200, and the mounting end face b is constructed as a mirror mounting surface.

[0045] It should be pointed out that, as Figure 3 As shown, the portion of the cover bottom surface a between the fastener mounting hole 12 and the cam bearing hole 11 is not coated with sealant. Instead, it is pressed onto the mounting end face b of the cylinder head cover 100 by fasteners 200, generating a clamping force to press the top surface of the cylinder head and the bottom surface a of the cover together, thus achieving the sealing of the two sealing surfaces. However, some of the fuel-air mixture inside the engine may leak into the fastener mounting hole 12. Figure 3 (As shown by the middle arrow), the head of the fastener 200 and the mounting end face b are pressed together to achieve a seal on the fastener mounting hole 12. That is, a sealing area is also formed between the mounting end face b and the head of the fastener 200. The fastener 200 can be a bolt, and a seal is formed between the bolt head and the mounting end face b, such as by pressing and sealing, setting a sealing gasket, or applying sealant.

[0046] Furthermore, the fastener 200 can be a bolt, which can be a large flange hexagonal bolt or a small flange bolt with a gasket, to increase the contact area between the bolt head and the mounting end face b of the cylinder head cover 100, and to increase the clamping force of the bolt head to improve the sealing performance.

[0047] Furthermore, in order to reduce the impact of excessive surface roughness of the mounting end face b on the sealing performance, the mounting end face b can be machined to form a mirror mounting surface, thereby reducing the sealing risks caused by abnormal surface roughness and further improving the sealing effect.

[0048] According to some embodiments of this utility model, the surface roughness of the mounting end face b satisfies Ra≤3.2μm and Rz≤10μm.

[0049] Ra is the arithmetic mean deviation of the profile, which is a core parameter for measuring surface roughness. 3.2 μm means that within the sampling length, the arithmetic mean distance from each point on the surface profile of the mounting end face b to the baseline is 3.2 micrometers. Rz is the maximum height of the profile, which is another core parameter for measuring surface roughness. Within the sampling length, the vertical distance between the profile peak line (the line connecting all the highest points of the profile) and the profile valley line (the line connecting all the lowest points of the profile) reflects the "maximum drop" of the surface micro-undulations. That is, the vertical distance between the line connecting multiple highest points of the mounting end face b and the line connecting the lowest points is less than 10 μm.

[0050] In this way, the surface roughness of the mounting end face b can meet the above-mentioned requirements. At the same time, combined with the clamping force of the fastener 200, the sealing surface between the mounting end face b and the head of the fastener 200 can be effectively covered. This can effectively improve the sealing fit between the fastener 200 and the mounting end face b, thereby improving sealing reliability, reducing the probability of oil-gas mixture overflow, improving the working reliability and stability of the engine, and extending the service life of the engine.

[0051] like Figure 1 and Figure 2 As shown, according to some embodiments of the present invention, the cover body 10 also has a sealing groove 14, which is formed on the bottom surface a of the cover, away from the cylinder head recess, and communicates with the fastener mounting hole 12.

[0052] Specifically, the sealing groove 14 is constructed as a recessed groove structure away from the top surface of the cylinder head, and the sealing groove 14 is connected to the fastener mounting hole 12. The sealing groove 14 can be used to reverse the capillary action between the top surface of the cylinder head and the bottom surface a of the cylinder head cover 100, effectively increasing the gap between the bottom surface a of the cover and the top surface of the cylinder head. This utilizes the capillary action principle to reduce the height of the oil-air mixture entering the fastener mounting hole 12 within the sealing area (see...). Figure 3 , Figure 3 The middle arrow indicates the distribution and maximum height of the oil-air mixture in the sealing groove 14 and the fastener mounting hole 12. This can effectively reduce the capillary height, thereby reducing the concentration of the oil-air mixture in the sealing area formed by the mounting end face b and the head of the fastener 200. This can reduce the sealing pressure on the head of the fastener 200. At the same time, the end face of the sealing groove 14 away from the bottom surface a of the cover can partially block the oil-air mixture, which can also reduce the probability of oil-air mixture overflow between the top fastener 200 of the cylinder head cover 100 and the mounting end face b.

[0053] like Figure 1 As shown, according to some embodiments of the present invention, the sealing groove 14 is spaced apart from the side wall of the cover body 10.

[0054] This separation of the sealing groove 14 from the side wall of the cover body 10 ensures that the outer contour of the bottom surface a of the cylinder head cover 100 is not open. During the machining of the cam bearing hole 11, machining debris can be prevented from entering the sealing groove 14, thereby improving the cleanliness of the cylinder head cover 100, reducing the difficulty of cleaning, and preventing metal debris from remaining after assembly, which could affect the working stability and reliability of the engine.

[0055] Combination Figure 1 , Figure 2 as well as Figure 3As shown, according to some embodiments of the present invention, there are multiple sealing grooves 14, which are arranged around the fastener mounting hole 12, and the total length of the multiple sealing grooves 14 is greater than the diameter of the fastener mounting hole 12.

[0056] Specifically, there are two sealing grooves 14 in the attached figure, which are arranged opposite each other in the radial direction of the fastener mounting hole 12 to form a sealing groove 14 with a total length greater than the diameter of the fastener mounting hole 12. Of course, there can also be three or more sealing grooves 14, and the extension direction can be consistent with or inconsistent with the axial direction of the cam bearing hole 11, and they are arranged around the fastener mounting hole 12, and all of them are connected to the fastener mounting hole 12 to generate capillary action, and at the same time, a sealing groove 14 with a total length greater than the diameter of the fastener mounting hole 12 can be formed.

[0057] This increases the gap between the top surface of the cylinder head and the bottom surface a of the cover, effectively reducing the height of the oil-air mixture entering the fastener mounting hole 12 via capillary action at the sealing mating surface (see...). Figure 3 At the same time, it can also store some of the sealant overflowing from the glue tank 13, effectively preventing the sealant from entering the cam bearing hole 11, further reducing the probability of the sealant entering the cam bearing hole 11, so as to reduce the risk of camshaft wear and seizing.

[0058] According to some embodiments of the present invention, the height of the sealing groove 14 is H1, the width is D1, the cross-sectional area of ​​the adhesive groove 13 is S1, and H1*D1≥S1 is satisfied, or the diameter of the fastener mounting hole 12 is D2, and 1mm≤H1≤D2, 1mm≤D1≤4mm is satisfied.

[0059] Specifically, the product of the height and width of the sealing groove 14 is less than the cross-sectional area of ​​the adhesive groove 13, and the height and width of the sealing groove 14 satisfy: 1mm≤H1≤D2, 1mm≤D1≤4mm.

[0060] In this way, the sealing groove 14 can fully utilize the capillary action of the sealing joint area in the reverse direction, effectively increasing the gap between the two sealing joint surfaces. By effectively utilizing the capillary action principle, the height of the oil-gas mixture entering the fastener mounting hole 12 through the capillary action of the sealing joint surface can be reduced, which can effectively reduce the capillary height and thus reduce the concentration of the oil-gas mixture that overflows to the mounting end face b through the fastener mounting hole 12, thereby reducing the sealing pressure on the head of the fastener 200.

[0061] At the same time, the width of the sealing groove 14 can be smaller than the diameter of the fastener mounting hole 12, which can effectively prevent the sealing groove 14 from being too wide, resulting in a reduction in the area of ​​the pressing area between the periphery of the fastener mounting hole 12 and the top surface of the cylinder head. This can effectively prevent the pressing force from being too small and the pressing area from being too small, thereby reducing the adverse effects of setting the sealing groove 14 on the sealing joint surface.

[0062] This utility model discloses an engine, which includes: the cylinder head cover 100 in the above embodiment.

[0063] According to the embodiment of this utility model, the engine using the above-mentioned cylinder head cover 100 can, on the one hand, improve the sealing effect and reduce the probability of sealant overflowing into the cam bearing hole 11, thereby improving the engine's working stability and reliability; on the other hand, it can reduce the distance between the fastener mounting hole 12 and the cam bearing hole 11, reduce the fastener 200 span, which is conducive to the compact and miniaturized design of the engine, can reduce engine weight, reduce engine size, further reduce fuel consumption, and improve the overall fuel economy of the vehicle.

[0064] The cylinder head cover 100 and other components and operations of the engine according to the embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0065] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

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

Claims

1. A cylinder head cover, wherein the cylinder head cover is disposed on the cylinder head, characterized in that, include: Cover body (10) has a cover bottom surface (a) facing the cylinder head. The cover body (10) has a cam bearing hole (11), a fastener mounting hole (12) located axially outside the cam bearing hole (11), and a glue-receiving groove (13) located on the side of the fastener mounting hole (12) away from the cam bearing hole (11). The glue-receiving groove (13) is located on the cover bottom surface (a).

2. The cylinder head cover according to claim 1, characterized in that, The cover body (10) has an installation end face (b) on the side away from the bottom surface (a) of the cover. The installation end face (b) cooperates with the head of the fastener (200), and the installation end face (b) is constructed as a mirror mounting surface.

3. The cylinder head cover according to claim 2, characterized in that, The surface roughness of the mounting end face (b) satisfies Ra≤3.2μm and Rz≤10μm.

4. The cylinder head cover according to claim 1, characterized in that, The cover body (10) also has a sealing groove (14), which is formed on the bottom surface (a) of the cover, away from the cylinder head recess, and communicates with the fastener mounting hole (12).

5. The cylinder head cover according to claim 4, characterized in that, The sealing groove (14) is spaced apart from the side wall of the cover body (10).

6. The cylinder head cover according to claim 4, characterized in that, There are multiple sealing grooves (14), which are arranged around the fastener mounting hole (12), and the total length of the multiple sealing grooves (14) is greater than the diameter of the fastener mounting hole (12).

7. The cylinder head cover according to any one of claims 4-6, characterized in that, The height of the sealing groove (14) is H1 and the width is D1. The cross-sectional area of ​​the adhesive groove (13) is S1, and H1*D1≥S1 is satisfied.

8. The cylinder head cover according to claim 7, characterized in that, The diameter of the fastener mounting hole (12) is D2, and satisfies: 1mm≤H1≤D2.

9. The cylinder head cover according to claim 7, characterized in that, 1mm≤D1≤4mm.

10. An engine, characterized in that, include: The cylinder head cover according to any one of claims 1-9.

Images