Sealing gasket, engine and vehicle

Abstract

The invention relates to a sealing gasket, an engine and a vehicle. The sealing gasket is used for forming sealing between a cylinder body and a cylinder cover. The sealing gasket comprises a functional layer used for covering a functional area; the reinforcing layer is used for covering the reinforcing area; wherein the reinforcing layer and the functional layer are arranged in a stacked mode, and the reinforcing area is located in the functional area. The sealing gasket has the beneficial effects that the reinforcing layer is arranged, the reinforcing area covered by the reinforcing layer is located in the functional area covered by the functional layer, distribution of clamping force in different areas of the sealing gasket is balanced, the situation that the clamping force of part of the areas is too large or too small is prevented, and the sealing gasket is not prone to deformation. The sealing gasket is prevented from being crushed while the uniform distribution of sealing force on the sealing gasket and the anti-fatigue performance are improved, so that the sealing performance is improved.

Description

Technical Field

[0001] The present application relates to the field of engine technology, and in particular to a sealing gasket, an engine and a vehicle. Background Art

[0002] The cylinder head gasket is a key component of the engine sealing system. It is made of multiple layers of metal that are riveted together, and sealing corrugations with a certain height and width are stamped out on each layer of metal sheet to wrap the areas that need to be sealed on the cylinder block and cylinder head flange surface. The main function of the cylinder head gasket is to seal the high-temperature combustion gas in the engine combustion chamber, the coolant in the water jacket, and the lubricating oil in the oil channel to prevent them from leaking, and to prevent foreign matter from entering the cylinder block. The working environment of the cylinder head gasket is very harsh and it needs to withstand extremely high alternating thermal loads and mechanical loads.

[0003] When the cylinder block and cylinder head are assembled and fixed, a clamping force is generated on the cylinder head gasket, causing the sealing corrugations on the cylinder head gasket to be compressed by the cylinder block and cylinder head flange surfaces, thereby generating a rebound force. This rebound force reacts on the cylinder block and cylinder head flange surfaces, and continues to be greater than the pressure of the medium to be sealed during engine operation.

[0004] However, since different areas between the cylinder block and the cylinder head will have different clamping forces, the clamping force is unevenly distributed, which can easily cause the cylinder head gasket to be crushed in the area with greater clamping force, while the sealing force in the area with less clamping force is insufficient or the fatigue resistance is poor. Summary of the Invention

[0005] An embodiment of the present application provides a sealing gasket that balances the clamping force distribution in different areas of the sealing gasket, so as to at least partially solve the above-mentioned technical problems.

[0006] In order to achieve the above-mentioned object, according to a first aspect of the present application, a sealing gasket is provided for forming a seal between a cylinder block and a cylinder head; the sealing gasket comprises:

[0007] Functional layer, used to cover functional areas;

[0008] A reinforcement layer, used to cover the reinforcement area;

[0009] The reinforcement layer and the functional layer are stacked together, and the reinforcement region is located inside the functional region.

[0010] Optionally, the functional area includes a first axial force area and a second axial force area; wherein the first axial force applied to the first axial force area is greater than the second axial force applied to the second axial force area, and the reinforcement area is arranged to overlap with at least part of the second axial force area.

[0011] Optionally, the sealing gasket has:

[0012] a first axial hole, passing through the functional layer corresponding to the first axial force region;

[0013] a second axial hole, passing through the functional layer and the reinforcement layer corresponding to the second axial force region respectively;

[0014] Wherein, the aperture of the first axial hole is larger than the aperture of the second axial hole.

[0015] Optionally, the functional layer includes a first main body and a first sealing corrugation; the reinforcement layer includes a second main body and a second sealing corrugation;

[0016] Wherein, in the stacking direction of the reinforcement layer and the functional layer, the first sealing corrugation protrudes from the first body, the second sealing corrugation protrudes from the second body, and the orthographic projection of the second sealing corrugation at least partially overlaps with the orthographic projection on the first sealing corrugation.

[0017] Optionally, the first sealing corrugation includes at least one of a full-wave structure corrugation and a half-wave structure corrugation; and / or

[0018] The second sealing corrugation includes at least one of a full-wave structure corrugation and a half-wave structure corrugation;

[0019] Wherein, the cross section of the full-wave structure corrugation parallel to the stacking direction is in the shape of a circular arc;

[0020] The half-wave structure corrugation includes: a contact portion and two side waist portions, the contact portion is constructed to have a contact surface perpendicular to the stacking direction, the two side waist portions are symmetrically arranged on both sides of the contact portion, and the two side waist portions are connected to the same first body or the second body.

[0021] Optionally, the first axial hole passes through the contact portion of the functional layer along the stacking direction; the second axial hole passes through the contact portions of the functional layer and the reinforcement layer respectively along the stacking direction.

[0022] Optionally, a transition region is formed between the first axial force region and the second axial force region, and the edge of the reinforcement layer is located in the transition region;

[0023] The width of the first sealing corrugation in the transition region is greater than the width of the first sealing corrugation in the first axial force region and the second axial force region; the height of the first sealing corrugation in the transition region is greater than the height of the first sealing corrugation in the first axial force region and the second axial force region; and / or

[0024] The width of the second sealing corrugation in the transition region is greater than the width of the second sealing corrugation in the second axial force region; the height of the second sealing corrugation in the transition region is greater than the height of the second sealing corrugation in the second axial force region.

[0025] Optionally, the width of the first sealing corrugation in the first axial force region is greater than the width of the first sealing corrugation in the second axial force region; the height of the first sealing corrugation in the first axial force region is less than the height of the first sealing corrugation in the second axial force region.

[0026] Optionally, the sealing gasket has a through hole, the functional layer has a first inner edge portion surrounding the through hole, and the reinforcement layer has a second inner edge portion surrounding at least a portion of the through hole.

[0027] Optionally, the sealing gasket further includes:

[0028] a limiting layer, fixedly connected to the functional layer;

[0029] The limiting layer is stacked between the functional layer and the reinforcement layer, and the limiting layer is arranged around the through hole.

[0030] Optionally, the functional layer includes: a first functional layer and a second functional layer;

[0031] Wherein, the reinforcement layer is arranged between the first functional layer and the second functional layer.

[0032] Optionally, the first functional layer includes a first substrate and a first surface coating, and the first surface coating is provided on a side of the first substrate away from the second functional layer; and / or

[0033] The second functional layer includes a second substrate and a second surface coating, wherein the second surface coating is arranged on a side of the second substrate away from the first functional layer.

[0034] Optionally, a transition region is formed between the first axial force region and the second axial force region, and the edge of the reinforcement layer is located in the transition region;

[0035] The reinforcement layer further includes a third substrate and a third surface coating;

[0036] The third surface coating is arranged on the side of the third substrate close to the functional layer; the thickness of the third surface coating located in the transition area is greater than the thickness of the third surface coating located in the second axial force area.

[0037] According to a second aspect of the present application, an engine is provided, comprising a cylinder block, a cylinder head, and the sealing gasket as described above; the sealing gasket is arranged between the cylinder block and the cylinder head.

[0038] Optionally, the sealing gasket has:

[0039] a through hole corresponding to the cylinder port of the cylinder body and the cylinder head;

[0040] a first axial hole having a first center distance relative to the through hole, and the first axial hole passes through the functional layer;

[0041] a second axial hole having a second center distance relative to the through hole, and the second axial hole passes through the functional layer and the reinforcement layer;

[0042] wherein the first center distance is greater than the second center distance;

[0043] The engine further comprises:

[0044] a first cylinder head bolt, respectively passing through the cylinder head, the first shaft hole and the cylinder body to fix the cylinder head and the cylinder body;

[0045] The second cylinder head bolts are respectively passed through the cylinder head, the second shaft hole and the cylinder body to fix the cylinder head and the cylinder body.

[0046] Optionally, the diameter of the first cylinder head bolt is greater than the diameter of the second cylinder head bolt; and / or

[0047] The bolt grade of the first cylinder head bolt is greater than the bolt grade of the second cylinder head bolt.

[0048] Optionally, a diameter of the first cylinder head bolt is greater than a diameter of the second cylinder head bolt, and a bolt grade of the first cylinder head bolt is equal to a bolt grade of the second cylinder head bolt.

[0049] According to a third aspect of the present application, a vehicle is also provided, comprising the engine as described above.

[0050] The benefit of the present application lies in providing a sealing gasket, an engine and a vehicle that balance the distribution of clamping force in different areas of the sealing gasket by providing a reinforcement layer.

[0051] More specifically, some embodiments of the present application may produce the following specific beneficial effects:

[0052] By setting up the reinforcement layer, and the reinforcement area covered by the reinforcement layer is located inside the functional area covered by the functional layer, the distribution of the clamping force in different areas of the sealing gasket is balanced, preventing the clamping force in some areas from being too large or too small. While improving the uniform distribution of the sealing force on the sealing gasket and the fatigue resistance, the sealing gasket is prevented from being crushed, thereby improving the sealing performance.

[0053] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] To more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0055] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same drawing numbers represent the same parts in the following description.

[0056] Figure 1 is an exploded schematic diagram of a sealing gasket provided in an exemplary embodiment of the present application;

[0057] Figure 2 is a schematic diagram of the overall structure of a sealing gasket provided in an exemplary embodiment of the present application;

[0058] Figure 3 yes Figure 2 Cross-sectional view taken along AA;

[0059] Figure 4 yes Figure 2 Cross-sectional view taken along BB;

[0060] Figure 5 yes Figure 2 Cross-sectional view taken along CC;

[0061] Figure 6 yes Figure 2 Cross-sectional view taken along the middle line DD;

[0062] Figure 7 yes Figure 2 A magnified schematic diagram of part E;

[0063] Figure 8 1 is a schematic structural diagram of a first sealing corrugation in a first axial force region of a sealing gasket provided in an exemplary embodiment of the present application;

[0064] Figure 9 1 is a schematic structural diagram of a first sealing corrugation in a second axial force region of a sealing gasket provided in an exemplary embodiment of the present application;

[0065] Figure 10 1 is a schematic structural diagram of a first sealing corrugation in a transition region of a sealing gasket provided in an exemplary embodiment of the present application;

[0066] Figure 11 Schematic diagram of the structure of the full-wave corrugation in the sealing gasket provided in an exemplary embodiment of the present application;

[0067] Figure 12Schematic diagram of the structure of the half-wave structure corrugation in the sealing gasket provided in the exemplary embodiment of the present application;

[0068] Figure 13 It is a schematic diagram of the overall structure of a vehicle provided in an exemplary embodiment of the present application.

[0069] Description of reference numerals:

[0070] 100. Sealing gasket;

[0071] 110, functional layer; Q1, functional area; 113, first body; 110a, first sealing corrugation; 110b, full-wave structure corrugation; 110c, half-wave structure corrugation; 110d, contact portion; 110e: side waist; 110f, contact surface; 110g, first inner edge portion;

[0072] Q11, first axial force area; Q12, second axial force area; Q13, transition area;

[0073] 111. First functional layer; 112. Second functional layer;

[0074] 120, reinforcement layer; P1, reinforcement area; 121, second body; 120a, second sealing corrugation; 120b, second inner edge portion;

[0075] 100a, first axial hole; 100b, second axial hole; 100c, through hole;

[0076] 130, limiting layer;

[0077] 10. Vehicles. DETAILED DESCRIPTION

[0078] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0079] According to the first aspect of this application, referring to Figure 1 and Figure 2 The present application provides a sealing gasket 100 for forming a seal between a cylinder block and a cylinder head, including sealing a combustion chamber, oil holes, water holes, etc. The sealing gasket 100 includes a functional layer 110 and a reinforcement layer 120 .

[0080] The functional layer 110 is used to cover the functional region Q1 , and the reinforcement layer 120 is used to cover the reinforcement region P1 . The reinforcement layer 120 and the functional layer 110 are stacked, and the reinforcement region P1 is located inside the functional region Q1 .

[0081] It can be understood that the functional area Q1 is the area covered by the functional layer 110 in the stacking direction. The stacking direction of the present application refers to the direction in which the functional layer 110 and the reinforcement layer 120 are stacked.

[0082] Specifically, the functional area Q1 covers the joint surface between the cylinder block and the cylinder head, and more specifically, the joint surface is the flange surface between the cylinder block and the cylinder head.

[0083] The sealing gasket 100 improves the sealing between the cylinder body and the cylinder head. By setting the reinforcement layer 120, the present application can achieve the enhancement or balance of the sealing, structural strength or clamping force on the basis of the functional layer.

[0084] Below, this application uses clamping force as an example to illustrate that when the cylinder block and cylinder head are assembled and fixed, the clamping force on the sealing gasket is generated by the joint surface. However, due to the differences in the fixing methods in different areas of the joint surface, different areas of the joint surface will have different clamping force distributions. The reinforced area P1 is the area covered by the reinforcing layer 120 in the stacking direction, that is, the reinforced area covers the local position of the joint surface to balance the distribution of the clamping force in different areas of the sealing gasket 100. Among them, the reinforced area P1 is located inside the functional area Q1. Based on simple understanding, it can be considered that the coverage area of the reinforced area P1 is smaller than the coverage area of the functional area Q1.

[0085] When the sealing gasket 100 is clamped by the cylinder block and the cylinder head, the clamping force of the cylinder block and the cylinder head acts on the functional layer 110 and the reinforcement layer 120 at the same time, or the clamping force acts on the reinforcement layer 120 through the functional layer 110 .

[0086] Through the above technical solution, by setting the reinforcement layer 120, and the reinforcement area P1 covered by the reinforcement layer 120 is located inside the functional area Q1 covered by the functional layer 110, the distribution of the clamping force in different areas of the sealing gasket 100 is balanced, and the situation where the clamping force in some areas is too large or too small is prevented. While improving the uniform distribution of the sealing force on the sealing gasket 100 and the fatigue resistance, it prevents the sealing gasket 100 from being crushed, thereby improving the sealing performance.

[0087] In some embodiments, the clamping force is provided by an axial force in the axial direction (along the stacking direction), based on the distribution of the axial force in different areas, referring to Figure 1 and Figure 2 The functional area Q1 includes a first axial force area Q11 and a second axial force area Q12. The first axial force in the first axial force area Q11 is greater than the second axial force in the second axial force area Q12. That is, the first axial force area Q11 covers the area of the joint surface with greater axial force, while the second axial force area Q12 covers the area of the joint surface with less axial force. The reinforcement area P1 overlaps with at least a portion of the second axial force area Q12.

[0088] For example, disposing the reinforcing layer 120 in the second axial force region Q12 can balance the clamping force in the first axial force region Q11 to the second axial force region Q12 , thereby achieving a balance in the clamping force between the first axial force region Q11 and the second axial force region Q12 .

[0089] In some embodiments, the axial force between the cylinder block and the cylinder head is provided by fasteners, which include bolts. For example, a first axial force region Q11 is provided by a plurality of first cylinder head bolts (not shown) providing a first axial force to clamp the sealing gasket 100, and a second axial force region Q12 is provided by a plurality of second cylinder head bolts (not shown) providing a second axial force to clamp the sealing gasket 100. The first cylinder head bolts and the second cylinder head bolts are distributed near the cylinder ports of the engine.

[0090] Due to the complexity and compact design of the cylinder head structure, the first and second cylinder head bolts are typically asymmetrically located relative to the center of the cylinder port. This means the distance between the first and second cylinder head bolts and the center of the cylinder port is greater than the distance between the first and second cylinder head bolts. To ensure even distribution of axial force around the cylinder port, the first axial force provided by the first cylinder head bolt is greater than the second axial force provided by the second cylinder head bolt.

[0091] Illustratively, the first axial force region Q11 uses two first cylinder head bolts of M12, and each second axial force region Q12 uses two second cylinder head bolts of M11, that is, the specifications of the first cylinder head bolts and the second cylinder head bolts are different.

[0092] The axial force provided by the first cylinder head bolt is greater than that provided by the second cylinder head bolt. Since the sealing gasket 100 generally adopts sealing corrugations for sealing, it is easy for the sealing corrugations of the sealing gasket 100 to be crushed in the first axial force area Q11, while the sealing corrugations in the second axial force area Q12 have insufficient sealing force or poor fatigue resistance.

[0093] In some embodiments, reference Figure 1 and Figure 2 、 Figure 5 and Figure 6 The sealing gasket 100 has a first axial hole 100a and a second axial hole 100b.

[0094] First axial hole 100a extends through functional layer 110 corresponding to the first axial force region; second axial hole 100b extends through functional layer 110 and reinforcement layer 120 corresponding to the second axial force region. First axial hole 100a is configured to engage with a first cylinder head bolt, while second axial hole 100b is configured to engage with a second cylinder head bolt. Specifically, the diameter of first axial hole 100a is larger than that of the second axial hole.

[0095] The first axial hole 100a and the second axial hole 100b are adapted to cylinder head bolts of different specifications, and the correspondence between the first axial hole 100a and the second axial hole 100b and the first axial force area and the second axial force area is limited. The reinforcing layer of the second axial force area is used to balance the axial force distribution of cylinder head bolts of different specifications, resist deformation of the cylinder block and cylinder head, and enable the sealing gasket 100 to accommodate a higher cylinder head jump amount. It is suitable for various working occasions of the engine, ensures the sealing performance of the sealing corrugation, and realizes the sealing function under harsh working conditions.

[0096] Reference Figure 2 The first axial hole 100a is located in the first axial force area Q11, and the second axial hole 100b is located in the second axial force area Q12. It can be understood that the first axial force area at least includes the area near the first axial hole, and the second axial force area at least includes the area near the second axial hole.

[0097] In some cylinder head and cylinder block assembly methods, for example, the cylinder head and cylinder block have two cylinder ports, two first cylinder head bolts are used in the middle of the two cylinder ports, and four second cylinder head bolts are used on the periphery of the two cylinder ports. The axial force in the middle of the two cylinder ports is greater than the axial force in the periphery. Accordingly, the first axial hole 100a is located in the middle of the sealing gasket 100, and the second axial hole 100b is located on the periphery of the sealing gasket 100. That is, referring to Figure 2 , the first axial force region Q11 is located between the two second axial force regions Q12.

[0098] It can be understood that the relative distribution of the first axial force region Q11 and the second axial force region Q12 is not limited to the above manner, and can be determined according to the specific design of the engine.

[0099] In some embodiments, reference Figure 1 、 Figure 4 and Figure 5 The functional layer 110 has a first main body 113 and a first sealing corrugation 110a; the reinforcement layer 120 has a second main body 121 and a second sealing corrugation 120a; wherein, in the stacking direction of the reinforcement layer 120 and the functional layer 110, the first sealing corrugation protrudes from the first main body 113, the second sealing corrugation protrudes from the second main body 121, and the orthographic projection of the second sealing corrugation 120a coincides with the orthographic projection on the first sealing corrugation 110a.

[0100] It can be understood that the functional layer 110 is provided with multiple circles of first sealing corrugations 110a at intervals in a plane perpendicular to the stacking direction. Similarly, the reinforcement layer 120 is provided with multiple circles of second sealing corrugations 120a at intervals in a plane perpendicular to the stacking direction, thereby forming multiple seals in a plane perpendicular to the stacking direction.

[0101] The first sealing corrugation 110a of the functional layer 110 may be used alone to achieve sealing between the cylinder block and the cylinder head, or the first sealing corrugation 110a of the functional layer 110 and the second sealing corrugation 120a of the reinforcement layer 120 may be superimposed to achieve sealing.

[0102] In some embodiments, reference Figure 3 The first sealing corrugation 110a includes at least one of a full-wave structure corrugation 110b and a half-wave structure corrugation 110c.

[0103] Specifically, refer to Figure 11 The cross section of the full-wave structure corrugation 110b parallel to the stacking direction is arc-shaped, so that the full-wave structure corrugation 110b can provide better elastic restoring force.

[0104] Reference Figure 4 and Figure 12 The half-wave corrugation 110c comprises a contact portion 110d and two side waist portions 110e. The contact portion 110d is constructed with a contact surface 110f perpendicular to the stacking direction. The contact surface 110f of the functional layer 110 is designed to directly contact the joint surface between the cylinder head and the cylinder body. The two side waist portions 110e are symmetrically arranged on either side of the contact portion 110d and connected to the same first body 113 or second body 121 to provide resilience. The combination of the contact portion 110d and the side waist portions 110e allows the half-wave corrugation 110c to provide a larger pressure contact surface through the contact portion 110d, effectively dispersing stress.

[0105] It can be understood that the first sealing corrugation 110a can adopt one of the full-wave structure corrugation 110b and the half-wave structure corrugation 110c, or a combination of the full-wave structure corrugation 110b and the half-wave structure corrugation 110c.

[0106] The second sealing corrugation 120a includes at least one of a full-wave structure corrugation and a half-wave structure corrugation.

[0107] The specific structures of the full-wave structure corrugation and the half-wave structure corrugation of the second sealing corrugation 120a are similar to those of the full-wave structure corrugation and the half-wave structure corrugation of the first sealing corrugation 110a, and are not repeated here.

[0108] Similarly, the second sealing corrugation 120a can adopt one of a full-wave structure corrugation and a half-wave structure corrugation, or a combination of the full-wave structure corrugation and the half-wave structure corrugation. The specific structure of the first sealing corrugation 110a and the second sealing corrugation 120a can be selected according to different sealing requirements and is not limited here.

[0109] The combination of full-wave and half-wave corrugations provides improved elastic recovery, resulting in a tighter seal. The half-wave corrugations provide a larger pressure contact surface, effectively dispersing stress and reducing stress concentration, thereby improving the fatigue resistance of the sealing gasket 100.

[0110] In some embodiments, reference Figure 1 and Figure 2 、 Figure 5 and Figure 6 The first axial hole 100a penetrates the contact portion 110d of the functional layer 110 along the stacking direction; the second axial hole 100b penetrates the contact portions 110d of the functional layer 110 and the reinforcement layer 120 respectively along the stacking direction.

[0111] It can be understood that the first axial hole 100a and the second axial hole 100b are formed in the half-wave structure corrugation. While providing axial force, the contact portion of the half-wave structure corrugation can play a limiting support role to prevent the sealing corrugation from being over-compressed.

[0112] In some embodiments, reference Figure 2 and Figure 7 A transition region Q13 is formed between the first axial force region Q11 and the second axial force region Q12 , and the edge of the reinforcement layer 120 is located in the transition region Q13 .

[0113] The width of the first sealing corrugation 110a in the transition area Q13 is greater than the width of the first sealing corrugation 110a in the first axial force area Q11 and the second axial force area Q12; the height of the first sealing corrugation 110a in the transition area Q13 is greater than the height of the first sealing corrugation 110a in the first axial force area Q11 and the second axial force area Q12.

[0114] It can be understood that the transition region Q13 may be a region including a portion of the edge of the reinforcement layer 120 , and its specific width may be determined according to design requirements.

[0115] Reference Figure 8 , the width of the first sealing corrugation 110a in the first axial force region Q11 is W1 and the height is H1; Figure 9 , the width of the first sealing corrugation 110a in the second axial force region Q12 is W2, and the height is H2; Figure 10 The width of the first sealing corrugation 110a in the transition region Q13 is W3, and the height is H3; wherein W3 is greater than W1 and W2, and H3 is greater than H1 and H2.

[0116] By increasing the wave height and wave width of the first sealing corrugation 110a in the transition area Q13, the strength of the first sealing corrugation 110a can be increased, preventing the sealing gasket 100 from leaking oil or air in the transition area Q13, and preventing the cylinder head bolt axial force from being too large to crush the first sealing corrugation 110a in the first axial force area Q11, thereby improving the sealing performance.

[0117] The width of the second sealing corrugation 120a in the transition region Q13 is greater than the width of the second sealing corrugation 120a in the second axial force region Q12; the height of the second sealing corrugation 120a in the transition region Q13 is greater than the height of the second sealing corrugation 120a in the second axial force region Q12.

[0118] Similarly, increasing the wave height and wave width of the second sealing corrugation 120a in the transition region Q13 can increase the strength of the second sealing corrugation 120a and further improve the sealing performance.

[0119] In some embodiments, the width of the first sealing corrugation 110a in the first axial force region Q11 is greater than the width of the first sealing corrugation 110a in the second axial force region Q12; the height of the first sealing corrugation 110a in the first axial force region Q11 is less than the height of the first sealing corrugation 110a in the second axial force region Q12.

[0120] Reference Figure 8 , the width of the first sealing corrugation 110a in the first axial force region Q11 is W1 and the height is H1; Figure 9 , the width of the first sealing corrugation 110a in the second axial force region Q12 is W2, and the height is H2; W1 is greater than W2, and H1 is smaller than H2.

[0121] By limiting the width and height of the first sealing corrugation 110 a in the first axial force region Q11 and the second axial force region Q12 , the axial force in the first axial force region Q11 can be better balanced toward the second axial force region Q12 .

[0122] In some embodiments, reference Figure 1 and Figure 2 The sealing gasket 100 has a through hole 100c, which corresponds to the cylinder port of the cylinder block and cylinder head, and is used to avoid the position of the cylinder port. The functional layer 110 has a first inner edge portion 110g surrounding the through hole 100c; the reinforcement layer 120 has a second inner edge portion 120b surrounding at least a portion of the through hole 100c.

[0123] In some embodiments, reference Figure 2The first axial hole 100a has a first center distance L1 relative to the through hole 100c, and the second axial hole 100b has a second center distance L2 relative to the through hole 100c. The first center distance L1 is greater than the second center distance L2, which adapts to the asymmetric distribution of the first cylinder head bolt and the second cylinder head bolt relative to the center of the cylinder port.

[0124] In some embodiments, reference Figures 2 to 4 The outer periphery of the through hole 100c is provided with full-wave structure corrugations and half-wave structure corrugations. In the radial direction of the through hole 100c, the full-wave structure corrugations are provided between the half-wave structure corrugations and the through hole 100c.

[0125] Exemplarily, a circle of full-wave structure corrugations 110b is arranged around the periphery of the through hole 100c, and half-wave structure corrugations 110c are arranged around the periphery of the full-wave structure corrugations 110b.

[0126] The combination of full-wave corrugations 110b and half-wave corrugations 110c around the periphery of through-hole 100c provides enhanced elastic recovery, resulting in a tighter seal and preventing oil or air leaks in the engine combustion chamber. Furthermore, the half-wave corrugations provide a larger pressure contact surface, effectively dispersing stress and reducing stress concentration, thereby improving the fatigue resistance of sealing gasket 100.

[0127] In some embodiments, reference Figure 1 and Figure 2 The first axial hole 100a is located between two adjacent through holes 100c, and the two first axial holes 100a in the middle are sealed together with a half-wave structure corrugated sealing corrugation, which can play a limiting support role in the through hole 100c to prevent the sealing corrugation from being over-compressed, thereby improving the vibration resistance and fatigue resistance of the full-wave structure corrugation relatively close to the through hole 100c.

[0128] In some embodiments, the sealing gasket 100 further has a water hole and an oil hole, and the sealing corrugations are further arranged around the water hole and the oil hole.

[0129] In some embodiments, reference Figure 1 、 Figure 3 and Figure 4 The sealing gasket 100 further includes: a limiting layer 130 .

[0130] The limiting layer 130 is stacked between the functional layer 110 and the reinforcing layer 120 and surrounds the through hole 100c. The limiting layer 130 is fixedly connected to the functional layer 110. The limiting layer 130 plays a role of limiting support.

[0131] Optionally, the limiting layer 130 is welded to the functional layer 110 .

[0132] In some embodiments, reference Figure 1 、 Figures 3 to 6 The functional layer 110 includes: a first functional layer 111 and a second functional layer 112 ; the reinforcement layer 120 is disposed between the first functional layer 111 and the second functional layer 112 .

[0133] It can be understood that the through hole 100c penetrates both the first functional layer 111 and the second functional layer 112, the first axial hole 100a penetrates both the first functional layer 111 and the second functional layer 112, and the second axial hole 100b sequentially penetrates the first functional layer 111, the reinforcement layer 120, and the second functional layer 112. The sealing corrugations on the first functional layer 111 and the sealing corrugations on the second functional layer 112 correspond one to one.

[0134] Optionally, the reinforcement layer 120 is fixed between the first functional layer 111 and the second functional layer 112 by rivets and punch rivets.

[0135] Through the combination of the first functional layer 111 and the second functional layer 112, the sealing gasket 100 generates a better rebound force to react on the cylinder block and the cylinder head flange surface when compressed by the cylinder head and the cylinder body, so that the sealing gasket 100 of the present application can accommodate a higher cylinder head jump amount.

[0136] In some embodiments, the limiting layer 130 is welded and fixed on the first functional layer 111 or the second functional layer 112 , and in the outer portion of the through hole 100 c , the limiting layer 130 is located between the reinforcing layer 120 and the first functional layer 111 or the second functional layer 112 .

[0137] In some embodiments, the first functional layer 111 and the second functional layer 112 are made of the same material so that they can produce approximately the same deformation when subjected to force, thereby preventing one from being over-extruded and affecting the sealing performance. Optionally, the first functional layer 111 and the second functional layer 112 are made of SUS301H stainless steel.

[0138] As a preferred solution, the reinforcement layer 120 is made of the same material as the first functional layer 111 and the second functional layer 112, so that they deform approximately the same when subjected to force, preventing one from being excessively squeezed and affecting sealing performance. Optionally, the reinforcement layer 120, the first functional layer 111, and the second functional layer 112 are all made of SUS301H stainless steel.

[0139] As a further preferred solution, the material hardness of the limiting layer 130 is less than that of the first functional layer 111 and the second functional layer 112 , so as to be adapted to provide the function of limiting support.

[0140] In some embodiments, the first functional layer 111 includes a first substrate and a first surface coating layer, and the first surface coating layer is disposed on a side of the first substrate away from the second functional layer 112 .

[0141] The second functional layer 112 includes a second substrate and a second surface coating. The second surface coating is disposed on a side of the second substrate away from the first functional layer 111 .

[0142] Optionally, the first surface coating includes one of a fluororubber (FKM) coating and an anti-stick coating. The second surface coating includes one of a fluororubber (FKM) coating and an anti-stick coating. The anti-stick coating may be a graphite coating, a polytetrafluoroethylene (PTFE) coating, or a polymer-based material.

[0143] Due to its excellent high temperature and chemical corrosion resistance, the fluororubber coating can withstand high temperatures and corrosive media while maintaining good sealing performance. At the same time, the fluororubber coating can also provide cushioning and shock absorption. In addition, the anti-stick coating provides good lubricity and non-stick properties.

[0144] In some embodiments, the thickness of the fluororubber coating in the first surface coating and the second surface coating ranges from 0.015 to 0.035 mm.

[0145] In some embodiments, the reinforcement layer 120 further includes a third substrate and a third surface coating. The third surface coating is disposed on a side of the third substrate adjacent to the functional layer, i.e., on the side of the reinforcement layer in contact with the functional layer. The third surface coating includes a fluororubber (FKM) coating.

[0146] The thickness of the third surface coating in the transition region Q13 is greater than the thickness of the third surface coating in the second axial force region Q12.

[0147] By increasing the thickness of the third surface coating in the transition area Q13, micro-sealing is achieved, thereby preventing the sealing gasket 100 from leaking oil or air in the transition area Q13 and improving the sealing performance.

[0148] In some embodiments, the thickness of the third surface coating of the reinforcing layer 120 in the second axial force region Q12 ranges from 0.006 mm to 0.015 mm, and the thickness of the third surface coating of the reinforcing layer 120 in the transition region Q13 ranges from 0.035 mm to 0.05 mm.

[0149] According to a second aspect of the present application, an engine is provided, which includes a cylinder block, a cylinder head, and the sealing gasket 100 as described above.

[0150] The sealing gasket 100 is disposed between the cylinder block and the cylinder head, and the sealing gasket 100 forms a seal between the cylinder block and the cylinder head.

[0151] The engine has all the beneficial effects of the above-mentioned sealing gasket 100, which will not be described in detail in this application.

[0152] In some embodiments, the clamping force between the cylinder block and the cylinder head may be provided by bolts, and the engine further comprises: a first cylinder head bolt and a second cylinder head bolt.

[0153] A plurality of first cylinder head bolts are provided, each passing through the cylinder head, the first axial hole 100a, and the cylinder body, and are used to fasten the cylinder head and the cylinder body so that the cylinder head and the cylinder body generate a first axial force acting on the sealing gasket. A plurality of second cylinder head bolts are provided, each passing through the cylinder head, the second axial hole 100b, and the cylinder body, and are used to fasten the cylinder head and the cylinder body so that the cylinder head and the cylinder body generate a second axial force acting on the sealing gasket 100.

[0154] Due to the complexity and compact design of the cylinder head structure, the first and second cylinder head bolts are typically asymmetrically located relative to the center of the cylinder port. This means the distance between the first and second cylinder head bolts and the center of the cylinder port is greater than the distance between the first and second cylinder head bolts. To ensure even distribution of axial force around the cylinder port, the first axial force provided by the first cylinder head bolt is greater than the second axial force provided by the second cylinder head bolt.

[0155] As an optional solution, the diameter of the first cylinder head bolt is larger than the diameter of the second cylinder head bolt. Alternatively, the bolt grade of the first cylinder head bolt is larger than the bolt grade of the second cylinder head bolt.

[0156] The diameter of the bolt in this application refers to the diameter of the main part of the bolt, that is, the diameter of the part of the bolt that penetrates the cylinder head and cylinder block. Under the same bolt grade, the larger the bolt diameter, the greater the bolt axial force.

[0157] In this application, bolt grade refers to the strength grade or material grade of the bolt, which is used to indicate the bolt's load-bearing capacity and range of application. The strength grade can be represented by a number, such as 8.8, 10.9, 12.9, etc. The number represents the minimum tensile strength of the bolt in megapascals (MPa). For the same bolt diameter, a higher grade results in a greater axial force on the bolt.

[0158] By adopting this solution, by selecting the diameter and bolt grade of the first cylinder head bolt and the second cylinder head bolt, the cylinder head bolts at different center distances from the cylinder port provide different axial forces, so that the force around the cylinder port is evenly distributed, and the cylinder port deformation problem caused by uneven distribution of axial force of the cylinder head bolts is minimized.

[0159] For example, the second cylinder head bolt may be selected with a diameter of M10 and a bolt grade of 10.9, while the first cylinder head bolt may be selected with a diameter of M11 and a bolt grade of 10.9 or with a diameter of M10 and a bolt grade of 11.9.

[0160] As a preferred solution, the diameter of the first cylinder head bolt is larger than the diameter of the second cylinder head bolt, and the bolt grade of the first cylinder head bolt is equal to the bolt grade of the second cylinder head bolt.

[0161] By using cylinder head bolts of the same bolt grade but different diameters, confusion is less likely to occur during assembly.

[0162] Exemplarily, the first cylinder head bolt and the second cylinder head bolt have the same bolt grade, the diameter of the first cylinder head bolt is M12, and the diameter of the second cylinder head bolt is M11.

[0163] According to the third aspect of this application, referring to Figure 13 , provides a vehicle 10, which includes the above-mentioned engine. The vehicle 10 has all the beneficial effects of the above-mentioned engine, which will not be repeated in this application.

[0164] The vehicle 10 may be a fuel vehicle, a plug-in hybrid vehicle, a new energy vehicle, etc., and this application does not make any specific limitation thereto.

[0165] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0166] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0167] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0168] The above are merely preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A sealing gasket for forming a seal between a cylinder block and a cylinder head; characterized in that: The sealing gasket comprises: Functional layer, used to cover functional areas; A reinforcement layer, used to cover the reinforcement area; The reinforcement layer and the functional layer are stacked, and the reinforcement area is located inside the functional area.

2. The sealing gasket according to claim 1, characterized in that The functional area includes a first axial force area and a second axial force area; wherein the first axial force applied to the first axial force area is greater than the second axial force applied to the second axial force area, and the reinforcement area is arranged to overlap with at least a portion of the second axial force area.

3. The sealing gasket according to claim 2, characterized in that The sealing gasket has: a first axial hole, passing through the functional layer corresponding to the first axial force region; a second axial hole, respectively penetrating the functional layer and the reinforcement layer corresponding to the second axial force region; Wherein, the aperture of the first axial hole is larger than the aperture of the second axial hole.

4. The sealing gasket according to claim 3, characterized in that The functional layer includes a first main body and a first sealing corrugation; the reinforcement layer includes a second main body and a second sealing corrugation; Wherein, in the stacking direction of the reinforcement layer and the functional layer, the first sealing corrugation protrudes from the first body, the second sealing corrugation protrudes from the second body, and the orthographic projection of the second sealing corrugation at least partially overlaps with the orthographic projection on the first sealing corrugation.

5. The sealing gasket according to claim 4, characterized in that: The first sealing corrugation includes at least one of a full-wave structure corrugation and a half-wave structure corrugation; and / or The second sealing corrugation includes at least one of a full-wave structure corrugation and a half-wave structure corrugation; Wherein, the cross section of the full-wave structure corrugation parallel to the stacking direction is in the shape of a circular arc; The half-wave structure corrugation includes: a contact portion and two side waist portions, the contact portion is constructed to have a contact surface perpendicular to the stacking direction, the two side waist portions are symmetrically arranged on both sides of the contact portion, and the two side waist portions are connected to the same first body or the second body.

6. The sealing gasket according to claim 5, characterized in that The first axial hole penetrates the contact portion of the functional layer along the stacking direction; the second axial hole penetrates the contact portions of the functional layer and the reinforcement layer respectively along the stacking direction.

7. The sealing gasket according to claim 4, characterized in that A transition region is formed between the first axial force region and the second axial force region, and an edge of the reinforcement layer is located in the transition region; The width of the first sealing corrugation in the transition region is greater than the width of the first sealing corrugation in the first axial force region and the second axial force region; the height of the first sealing corrugation in the transition region is greater than the height of the first sealing corrugation in the first axial force region and the second axial force region; and / or The width of the second sealing corrugation in the transition region is greater than the width of the second sealing corrugation in the second axial force region; the height of the second sealing corrugation in the transition region is greater than the height of the second sealing corrugation in the second axial force region.

8. The sealing gasket according to claim 4, wherein: The width of the first sealing corrugation in the first axial force region is greater than the width of the first sealing corrugation in the second axial force region; the height of the first sealing corrugation in the first axial force region is less than the height of the first sealing corrugation in the second axial force region.

9. The sealing gasket according to any one of claims 1 to 8, characterized in that: The sealing gasket has a through hole, the functional layer has a first inner edge portion surrounding the through hole, and the reinforcement layer has a second inner edge portion surrounding at least a portion of the through hole.

10. The sealing gasket according to claim 9, characterized in that: The sealing gasket also includes: a limiting layer, fixedly connected to the functional layer; The limiting layer is stacked between the functional layer and the reinforcement layer, and the limiting layer is arranged around the through hole.

11. The sealing gasket according to any one of claims 1 to 8, characterized in that: The functional layer includes: a first functional layer and a second functional layer; Wherein, the reinforcement layer is arranged between the first functional layer and the second functional layer.

12. The sealing gasket according to claim 11, characterized in that The first functional layer includes a first substrate and a first surface coating, wherein the first surface coating is disposed on a side of the first substrate away from the second functional layer; and / or The second functional layer includes a second substrate and a second surface coating, wherein the second surface coating is arranged on a side of the second substrate away from the first functional layer.

13. The sealing gasket according to any one of claims 2 to 8, characterized in that: A transition region is formed between the first axial force region and the second axial force region, and an edge of the reinforcement layer is located in the transition region; The reinforcement layer further includes a third substrate and a third surface coating; The third surface coating is arranged on a side surface of the third substrate close to the functional layer; the thickness of the third surface coating in the transition area is greater than the thickness of the third surface coating in the second axial force area.

14. An engine, characterized in that: It comprises a cylinder body, a cylinder head and a sealing gasket as claimed in any one of claims 1 to 13; the sealing gasket is arranged between the cylinder body and the cylinder head.

15. The engine according to claim 14, characterized in that The sealing gasket has: a through hole corresponding to the cylinder port of the cylinder body and the cylinder head; a first axial hole having a first center distance relative to the through hole, and the first axial hole passes through the functional layer; a second axial hole having a second center distance relative to the through hole, and the second axial hole passes through the functional layer and the reinforcement layer; wherein the first center distance is greater than the second center distance; The engine further comprises: a first cylinder head bolt, respectively passing through the cylinder head, the first shaft hole and the cylinder body to fix the cylinder head and the cylinder body; The second cylinder head bolts are respectively passed through the cylinder head, the second shaft hole and the cylinder body to fix the cylinder head and the cylinder body.

16. The engine according to claim 15, characterized in that The diameter of the first cylinder head bolt is greater than the diameter of the second cylinder head bolt; and / or The bolt grade of the first cylinder head bolt is greater than the bolt grade of the second cylinder head bolt.

17. The engine according to claim 16, characterized in that A diameter of the first cylinder head bolt is greater than a diameter of the second cylinder head bolt, and a bolt grade of the first cylinder head bolt is equal to a bolt grade of the second cylinder head bolt.

18. A vehicle, characterized in that: Comprising an engine as claimed in any one of claims 14 to 17.

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