A modified cylinder head gasket structure

Abstract

This utility model relates to the field of sealing technology, and in particular to a modified cylinder head gasket structure. It addresses the technical problem of the lack of a cylinder head gasket structure in the prior art that can meet the sealing requirements of an engine operating at a blow pressure of 130 bar. The modified cylinder head gasket body has cylinder ports arranged in a row, with a main sealing area formed around the cylinder ports, and an extension area formed on the extension surface of the main sealing area. An outer sealing rib structure is constructed on the extension area. The outer sealing rib structure is composed of multiple functional limiting units stacked in layers. Each functional limiting unit includes a lower functional layer, with limiting layers symmetrically arranged on the first surface of the lower functional layer. The advantage of this technical solution is that the extended area of ​​the modified cylinder head gasket body improves the stress distribution, the significant increase in functional layers greatly reduces the probability of cracking of the sealing ribs, and significantly improves the sealing performance and service life of the gasket, providing a more reliable guarantee for the stable operation of the engine.

Description

Technical Field

[0001] This utility model relates to the field of sealing technology, and in particular to a modified cylinder head gasket structure. Background Technology

[0002] In the fields of automobile manufacturing and new energy vehicle manufacturing technology, the sealing performance of the cylinder affects the operating quality of the power system.

[0003] Currently, existing design schemes typically adopt two-functional-layer or three-functional-layer design structures. This type of design scheme can only meet the needs of naturally aspirated or turbocharged engines with a burst pressure of 130 bar or less.

[0004] However, for high-performance engines with explosion pressure exceeding 130 bar, their sealing and durability are obviously insufficient, which can easily lead to problems such as air leakage and wear, affecting the overall performance and life of the engine. In practice, it has been found that adding functions to the design and improving the arrangement of the cylinder sealing area can effectively improve the fatigue resistance of the gasket and solve the sealing performance of high explosion pressure engines.

[0005] The design of existing functional layers is mostly built within the shape range of the gasket assembly, such as the Chinese utility model patent, publication number CN220319694U, patent title "A modified cylinder gasket assembly structure". However, when the number of functional layers increases and they are stacked, a more suitable sealing gasket structure is needed to achieve the sealing effect. Utility Model Content

[0006] This invention aims to address the technical problem of the lack of a cylinder head gasket structure in the prior art that can meet the sealing requirements of an engine operating at a blow pressure of 130 bar, and provides a modified cylinder head gasket structure.

[0007] To solve the above-mentioned technical problems, the specific technical solution of this utility model is as follows:

[0008] A modified cylinder head gasket structure, comprising:

[0009] The modified cylinder head gasket body 10 has cylinder ports 100 arranged in a row, a main sealing area 2 formed around the cylinder ports 1, and an extension area 3 can be formed on the extension surface of the main sealing area 2.

[0010] The extension area is constructed with an outer sealing rib structure 20.

[0011] The outer sealing rib structure 20 is composed of multiple functional limiting units 200 stacked together. Each layer of the functional limiting unit 200 includes a lower functional layer 201b, and the limiting layers 202 are symmetrically arranged on the first surface of the lower functional layer 201b.

[0012] In practice, the cylinder port 1 is divided into three groups, namely the first cylinder port 1-1, the second cylinder port 1-2 and the third cylinder port 1-3;

[0013] The extension region 3 includes:

[0014] The first extension area 3-1 is located on one side of the first cylinder port 1-1;

[0015] The second extension region 3-2 is located between the first cylinder port 1-1 and the second cylinder port 1-2;

[0016] The third extension area 3-3 is located on one side of the third cylinder port 1-3.

[0017] Implementably, the peripheral sealing rib structure 20 is constructed on the extension region 3 and shaped along the geometric contour of the extension region 3.

[0018] In practice, the functional limiting unit 200 has three layers;

[0019] Each layer of the functional limiting unit 200 includes:

[0020] The upper functional layer 201a is located above the lower functional layer 201b;

[0021] Viewed in one cross-sectional direction, the upper functional layer 201a and the lower functional layer 201b have arc-shaped protrusions that face the center of the current functional limiting unit 200.

[0022] In practice, the thickness of the limiting layer 202 is in the range of 0.04 mm to 0.08 mm.

[0023] In practice, the upper functional layer 201a and the lower functional layer 201b are made of stainless steel, with the material designation SUS301H.

[0024] In practice, the limiting layer 202 is made of stainless steel, with the material designation SUS304.

[0025] In practice, the width of the arc-shaped protrusion is in the range of 2.1 mm to 2.7 mm.

[0026] This utility model has the following beneficial effects:

[0027] The advantage of this technical solution is that the extended area of ​​the modified cylinder head gasket improves the stress distribution, and the outer sealing rib structure is composed of functional limiting units. It can use existing processes without adding extra steps. The significant increase in functional layers greatly reduces the probability of cracking of the sealing ribs, which greatly improves the sealing performance and service life of the gasket and provides a more reliable guarantee for the stable operation of the engine. Attached Figure Description

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0029] Figure 1 This is a schematic diagram of the modified cylinder head gasket body of this utility model;

[0030] Figure 2 This is a schematic diagram of the extension area of ​​this utility model;

[0031] Figure 3 This is a schematic diagram of the functional limiting unit of this utility model.

[0032] The reference numerals in the figure are:

[0033] Modified cylinder head gasket body 10, cylinder port 1, main sealing area 2, extension area 3;

[0034] 20mm outer sealing rib structure;

[0035] Functional limit unit 200, lower functional layer 201b, limit layer 202.

[0036] First cylinder port 1-1, second cylinder port 1-2, third cylinder port 1-3;

[0037] First extension zone 3-1, second extension zone 3-2, third extension zone 3-3.

[0038] Upper functional layer 201a. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. It should be noted that, for ease of description, in this application, "left side" is referred to as "first end", "right side" as "second end", "upper side" as "first end", and "lower side" as "second end" in the current view. The purpose of such description is to clearly express the technical solution and should not be construed as an improper limitation of the technical solution of this application.

[0040] In one specific embodiment, please refer to Figure 1-3 As shown, the modified cylinder head gasket structure includes:

[0041] The modified cylinder head gasket body 10 has cylinder ports 1 arranged in a row, a main sealing area 2 formed around the cylinder ports 1, and an extension area 3 formed on the extension surface of the main sealing area 2.

[0042] The extension area is constructed with an outer sealing rib structure 20;

[0043] The outer sealing rib structure 20 is composed of multiple functional limiting units 200 stacked together. Each functional limiting unit 200 includes a lower functional layer 201b, and the limiting layers 202 are symmetrically arranged on the first surface of the lower functional layer 201b.

[0044] Currently, existing designs typically employ two, three, or even four functional layers. These designs can only meet the needs of naturally aspirated or turbocharged engines with explosion pressures of 130 bar or less. However, for high-performance engines with explosion pressures exceeding 130 bar, their sealing and durability are significantly insufficient, easily leading to leaks, wear, and other problems, affecting the overall engine performance and lifespan. This proposed solution features a six-layer configuration, and its specific arrangement effectively improves the fatigue resistance of the gaskets, solving the sealing performance issues of high explosion pressure engines. (See attached diagram.) Figure 1 , 2 As shown in the specific embodiment, the cylinder port 1 is divided into three groups, namely the first cylinder port 1-1, the second cylinder port 1-2 and the third cylinder port 1-3;

[0045] The extension area 3 includes: a first extension area 3-1 located on one side of the first cylinder port 1-1, a second extension area 3-2 located between the first cylinder port 1-1 and the second cylinder port 1-2, and a third extension area 3-3 located on one side of the third cylinder port 1-3.

[0046] Adding a functional layer and using laser welding to enhance its durability ensures that the gasket does not shift during use, thus ensuring the stability and safety of the overall structure;

[0047] The use of extension zone 3 configuration enables a more uniform distribution of force across various functions. Traditional gaskets often suffer from uneven force distribution when subjected to force, resulting in excessive pressure in some areas and affecting overall performance. The above arrangement can effectively disperse pressure and make the force on each part of the gasket tend to be balanced.

[0048] From the perspective of the sealing rib, the outer sealing rib structure 20 is constructed on the extension area 3 and formed along the geometric contour of the extension area 3. This design greatly enhances the fatigue resistance of the sealing rib. During engine operation, the outer sealing rib structure 20 is continuously affected by factors such as pressure and temperature changes, which can easily lead to fatigue. In this solution, the outer sealing rib structure 20 reduces the local pressure burden on the sealing rib by uniformly distributing the force, thereby reducing the degree of fatigue damage.

[0049] In addition, cracking of the sealing rib is one of the key issues affecting the gasket's sealing performance. In this design, as shown in the attached... Figure 3As shown, the functional limiting unit 200 has three layers, which is equivalent to six layers of traditional functions. It adopts a design where every two groups form one unit, allowing the processing technology to be applied to conventional processes (see cited patent publication number CN220319694U). Each layer of the functional limiting unit 200 includes:

[0050] The upper functional layer 201a is located above the lower functional layer 201b; in a cross-sectional direction, the upper functional layer 201a and the lower functional layer 201b have arc-shaped protrusions that face the center of the current functional limiting unit 200.

[0051] Due to its uniform distribution, the stress on the outer sealing rib structure 20 is more balanced, effectively reducing the risk of cracking caused by stress concentration. The cracking probability of the sealing rib is greatly reduced, which greatly improves the sealing performance and service life of the gasket and provides a more reliable guarantee for the stable operation of the engine.

[0052] In one specific embodiment, the thickness of the limiting layer 202 ranges from 0.04 mm to 0.08 mm.

[0053] In one specific embodiment, the upper functional layer 201a and the lower functional layer 201b are made of stainless steel, with the material designation SUS301H.

[0054] In one specific embodiment, the limiting layer 202 is made of stainless steel, with the material designation SUS304.

[0055] In one specific embodiment, the width of the arc-shaped protrusion ranges from 2.1 mm to 2.7 mm.

[0056] In summary, the advantages of this technical solution are that the extended area 3 of the modified cylinder head gasket body 10 improves the stress distribution, and the outer sealing rib structure 20 is composed of functional limiting units 200. It can adopt existing processes without adding extra steps. The significant increase in functional layers greatly reduces the probability of cracking of the sealing ribs, which greatly improves the sealing performance and service life of the gasket and provides a more reliable guarantee for the stable operation of the engine.

[0057] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A retrofit gasket structure, characterized by, include: The modified cylinder head gasket body (10) has cylinder ports (1) arranged in a row, a main sealing area (2) is formed around the cylinder ports (1), and an extension area (3) can be formed on the extension surface of the main sealing area (2). The extension area is constructed with an outer sealing rib structure (20); The outer sealing rib structure (20) is composed of multiple functional limiting units (200) stacked together. Each layer of the functional limiting unit (200) includes a lower functional layer (201b), and the limiting layer (202) is symmetrically arranged on the first surface of the lower functional layer (201b).

2. The modified cylinder head gasket structure of claim 1 wherein, The cylinder port (1) consists of three groups, namely the first cylinder port (1-1), the second cylinder port (1-2), and the third cylinder port (1-3); The extended region (3) includes: The first extension region (3-1) is located on one side of the first cylinder port (1-1); The second extension region (3-2) is located between the first cylinder port (1-1) and the second cylinder port (1-2); The third extension area (3-3) is located on one side of the third cylinder port (1-3).

3. The modified cylinder head gasket structure of claim 2 wherein, The outer sealing rib structure (20) is constructed on the extension area (3) and is shaped along the geometric contour of the extension area (3).

4. The modified cylinder liner structure according to any one of claims 1 to 3, characterized by The functional limiting unit (200) has three layers; Each layer of the functional limiting unit (200) includes: The upper functional layer (201a) is located above the lower functional layer (201b); Viewed in one cross-sectional direction, the upper functional layer (201a) and the lower functional layer (201b) have arc-shaped protrusions that face the center of the current functional limiting unit (200).

5. The modified cylinder head gasket structure of claim 4 wherein, The thickness of the limiting layer (202) ranges from 0.04 mm to 0.08 mm.

6. The modified cylinder head gasket structure of claim 4 wherein, The upper functional layer (201a) and the lower functional layer (201b) are made of stainless steel, with the material code SUS301H.

7. The modified cylinder head gasket structure of claim 4 wherein, The limiting layer (202) is made of stainless steel, with the material code SUS304.

8. The modified cylinder head gasket structure of claim 4 wherein, The width of the arc-shaped protrusion ranges from 2.1 mm to 2.7 mm.

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