CN216975054U - Cylinder head gasket, engine and vehicle - Google Patents

Abstract

The utility model belongs to the technical field of engine parts, and particularly discloses a cylinder head gasket, an engine and a vehicle. When the cylinder cover gasket is used for an engine, the gasket body is sleeved on a cylinder sleeve of the engine, then the cylinder cover is mounted on an engine body of the engine through a fastener and is abutted against the first annular boss, and the fastener is fastened, so that the gap between the second annular boss and the cylinder cover is reduced and is close to 0. When the engine runs, the second annular boss blocks high-temperature fuel gas in the combustion chamber, so that the impact of the high-temperature fuel gas on the sealing position of the first annular boss and the cylinder cover is avoided, and the sealing effect is ensured.

Description

Cylinder head gasket, engine and vehicle

Technical Field

The utility model relates to the technical field of engine parts, in particular to a cylinder head gasket, an engine and a vehicle.

Background

This section provides background information related to the present disclosure only and is not necessarily prior art.

In the structure of the existing engine, the cylinder sleeve is used for blocking the impact of partial gas on the sealing surface of the cylinder head gasket, the assembled cylinder sleeve and the assembled cylinder head must keep a certain gap (because the accumulated tolerance of relevant sizes of the cylinder sleeve and the cylinder head gasket when the cylinder head gasket is assembled on the cylinder sleeve is considered, and the deformation of the cylinder head gasket, if the gap is too small, the cylinder head is pressed on the cylinder sleeve to cause the sealing failure) so as to meet the sealing requirement, and the gap is about more than 0.5 mm.

With the increasing of the strengthening degree of the engine, high-temperature and high-pressure fuel gas (about more than 200 atmospheric pressures) impacts the sealing surfaces of the cylinder head and the cylinder head gasket through the gap, and long-time impact can cause the sealing surfaces of the cylinder head gasket and the cylinder head gasket to be damaged, so that sealing failure is caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims to at least solve the problem of sealing failure between a cylinder head gasket and a cylinder cover. The purpose is realized by the following technical scheme:

the utility model provides a cylinder head gasket, which is used for being sleeved on a cylinder sleeve of an engine and being arranged between the cylinder cover of the engine and the cylinder sleeve in a sealing mode.

According to the cylinder head gasket disclosed by the utility model, when the cylinder head gasket is used for an engine, the gasket body is sleeved on the cylinder sleeve of the engine, the second annular boss is arranged close to one side of the cylinder sleeve, then the cylinder head is arranged on the engine body of the engine through the fastening piece and abuts against the first annular boss, and the fastening piece is fastened, so that the gap between the second annular boss and the cylinder head is reduced and is close to 0. When the engine runs, the second annular boss blocks high-temperature gas in the combustion chamber, so that the impact of the high-temperature gas on the sealing position of the first annular boss and the cylinder cover is avoided, and the sealing effect is ensured.

In addition, the cylinder head gasket according to the present invention may have the following additional technical features:

in some embodiments of the utility model, the top surface of the first annular projection forms a first sealing surface, the top surface of the second annular projection forms a second sealing surface, and the height difference between the first sealing surface and the second sealing member is a preset value.

In some embodiments of the present invention, the preset value ranges from 0.15mm to 2 mm.

In some embodiments of the present invention, a cross section of the first annular projection in an axial direction of the gasket body has a first trapezoid shape, and an upper bottom surface of the first trapezoid shape is the first sealing surface.

In some embodiments of the present invention, a cross section of the second annular boss in the axial direction of the gasket body is a second trapezoid, and an upper bottom surface of the second trapezoid is the second sealing surface.

In some embodiments of the present invention, the gasket body is provided with a mounting hole for sleeving the cylinder liner, and the mounting hole is coaxially disposed inside the second annular boss.

The utility model also proposes an engine comprising a cylinder head gasket according to the above.

The utility model also proposes a vehicle comprising an engine according to the above.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like parts are designated by like reference numerals throughout the drawings. In the drawings:

fig. 1 schematically shows a structural sectional view of a cylinder head gasket according to an embodiment of the present invention;

FIG. 2 is an enlarged schematic view of the structure shown in FIG. 1 at A;

FIG. 3 is a partial cross-sectional view of the cylinder head gasket shown in FIG. 1 in use with an engine;

fig. 4 is an enlarged schematic view of the structure shown in fig. 3 at B.

The reference symbols in the drawings denote the following:

100-cylinder head gasket;

1-a gasket body;

11-mounting holes;

12-a first annular boss;

13-a second annular boss;

200-an engine;

21-a cylinder cover;

22-cylinder liner.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

As shown in fig. 1 to 4, according to an embodiment of the present invention, there is provided a cylinder head gasket 100, the cylinder head gasket 100 is configured to be fitted over a cylinder liner 22 of an engine 200 and to be sealingly disposed between a cylinder head 21 and the cylinder liner 22 of the engine 200, the cylinder head gasket 100 includes a gasket body 1, a first annular projection 12 and a second annular projection 13 are coaxially disposed on a side surface of the gasket body 1 facing the cylinder head 21, the second annular projection 13 is disposed at an interval inside the first annular projection 12, and a height of the second annular projection 13 is smaller than a height of the first annular projection 12.

According to the cylinder head gasket 100 of the present invention, when the cylinder head gasket 100 is used in an engine 200, the gasket body 1 is fitted around the cylinder liner 22 of the engine 200, and at this time, the second annular boss 13 is disposed close to one side of the cylinder liner 22, and then the cylinder head 21 is mounted on the engine body of the engine 200 by a fastening member and abuts against the first annular boss 12, and by fastening the fastening member, the gap between the second annular boss 13 and the cylinder head 21 is reduced and is close to 0. When the engine 200 operates, the second annular boss 13 blocks high-temperature gas in the combustion chamber, so that impact of the high-temperature gas on the sealing position of the first annular boss 12 and the cylinder cover 21 is avoided, and the sealing effect is ensured.

In the utility model, when the gasket body 1 is sleeved on the cylinder sleeve 22, the first annular boss 12 and the second annular boss 13 both protrude out of the top of the cylinder sleeve 22, after the cylinder cover 21 is connected with the engine body of the engine 200 through the fastener, the cylinder cover 21 abuts against the first annular boss 12 (forming a sealing structure), after the fastener is fastened, the cylinder cover gasket 100 has certain deformation, the cylinder cover 21 and the top of the cylinder sleeve 22 are arranged at intervals, and the gap between the cylinder cover 21 and the second annular boss 13 is close to 0 (as shown in fig. 4, b is a gap between the second annular boss and the cylinder cover), so that the first annular boss 12 is utilized to block high-temperature gas, and the high-temperature gas is prevented from impacting the seal between the first annular boss and the cylinder cover 21, thereby ensuring the sealing effect between the first annular boss and the cylinder cover.

It should be understood that, the cylinder head 21 is connected with the machine body through the bolts, the bolt connection has high strength and good stability, and along with the continuous screwing of the bolts, the cylinder head gasket 100 can be deformed to a certain extent to eliminate the gap between the second annular boss 13 and the cylinder head 21, so that a "pressure dam" structure is formed in front of the first annular boss 12, and then the high-temperature gas is better blocked, so as to avoid the impact damage of the high-temperature gas to the sealing structure.

In addition, first annular boss 12 and the coaxial setting of second annular boss 13 to second annular boss 13 sets up in the inboard of first annular boss 12 and is close to cylinder liner 22 and sets up, and engine 200 is in operation, and high temperature gas produces the impact to its radial outside from cylinder liner 22, through the mode of setting of first annular boss 12 and second annular boss 13, can guarantee the effect and the stability of blockking to high temperature gas, further guarantees sealed effect.

In some embodiments of the present invention, as shown in fig. 2, the top surface of the first annular projection 12 forms a first sealing surface, the top surface of the second annular projection 13 forms a second sealing surface, and the height difference between the first sealing surface and the second sealing member is a preset value, which is denoted as a in fig. 2.

Wherein, the first annular boss 12 and the second annular boss 13 are both disposed on the same side of the gasket body 1, and the side faces the cylinder cover 21, the first annular boss 12 is disposed coaxially and at an interval outside the second annular boss 13, the height of the first boss is set to be greater than that of the second boss, and the height difference between the two is a preset value, as shown in fig. 3 and 4, when the cylinder cover 21 is fitted with the body of the engine 200, the cylinder cover gasket 100 is sleeved outside the cylinder sleeve 22 and abuts against the cylinder cover 21, wherein the top surface of the first annular boss 12 abuts against the cylinder cover 21, so as to seal the cylinder cover 21 by using the first sealing surface at the top of the first annular boss 12, when the cylinder cover 21 is connected and fixed with the body by using a fastener (such as a bolt, etc.), the cylinder cover gasket 100 deforms, the strength of the first annular boss 12 abutting against the cylinder cover 21 increases, the height difference between the first annular boss 12 and the second annular boss 13 is reduced and is close to 0, so that the first annular boss 12 is used for shielding high-temperature gas, the high-temperature gas is prevented from impacting the seal between the first annular boss 12 and the cylinder cover 21, and the sealing effect is further improved.

In addition, in the embodiment of the present invention, an annular groove is formed on the side surface of the gasket body 1 facing the cylinder head 21, a second annular boss 13 is formed on one side of the annular groove close to the cylinder liner 22, and a first annular boss 12 is formed on the other side of the annular groove far from the cylinder liner 22.

In some embodiments of the utility model, the predetermined value is between 0.15mm and 2 mm. Wherein, through setting up the default between 0.15mm ~ 2mm to guaranteed that when cylinder cap 21 passes through the fastener to be fixed on engine 200's organism, gasket body 1 takes place to warp, and the annular boss 13 of second contacts with cylinder cap 21, in order to guarantee that the annular boss 13 of second stops high temperature gas, so that cylinder head gasket 100's sealed effect has obtained the promotion.

In addition, in the present invention, the above preset values may be 0.16mm, 0.17mm, 0.18mm, 0.19mm … ….

In some embodiments of the present invention, the cross section of the first annular projection 12 in the axial direction of the gasket body 1 is a first trapezoid, and the upper bottom surface of the first trapezoid is a first sealing surface. Wherein, the structure of first cyclic annular boss 12 can increase the area of contact of first cyclic annular boss 12 and cylinder cap 21 to improve cylinder head gasket 100 to the sealing capacity of cylinder cap 21, make sealed effect obtain promoting effectively.

In some embodiments of the present invention, the cross section of the second annular projection 13 in the axial direction of the gasket body 1 is a second trapezoid, and the upper bottom surface of the second trapezoid is a second sealing surface. The structure of the second annular boss 13 can increase the contact area between the second annular boss 13 and the cylinder cover 21, and further improves the sealing capability of the cylinder cover gasket 100 on the cylinder cover 21, so that the sealing effect is effectively improved.

In some embodiments of the present invention, the gasket body 1 is provided with a mounting hole 11 for sleeving the cylinder liner 22, and the mounting hole 11 is coaxially disposed inside the second annular boss 13. When the cylinder head gasket 100 is used for the engine 200, the mounting hole 11 on the gasket body 1 is arranged corresponding to the cylinder sleeve 22 of the engine 200, and the part of the cylinder sleeve 22 protruding out of the cylinder body penetrates through the mounting hole 11, so that the cylinder sleeve 22 is matched with the gasket body 1 in a sleeving manner, and the arrangement mode of the mounting hole 11, the first annular boss 12 and the second annular boss 13 can prevent high-temperature gas from impacting a sealing structure, so that the sealing effect is guaranteed.

The utility model also provides an engine 200, wherein the engine 200 comprises the cylinder head gasket 100 in any one of the embodiments.

The utility model also proposes a vehicle comprising the engine 200 in the above embodiment.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (8)

1. The cylinder head gasket is used for being sleeved on a cylinder sleeve of an engine and is arranged between the cylinder cover of the engine and the cylinder sleeve in a sealing mode, and is characterized by comprising a gasket body, wherein a first annular boss and a second annular boss are coaxially arranged on the side face, facing the cylinder cover, of the gasket body, the second annular boss is arranged on the inner side of the first annular boss at intervals, and the height of the second annular boss is smaller than that of the first annular boss.

2. The cylinder head gasket of claim 1, wherein a top surface of said first annular land forms a first sealing surface and a top surface of said second annular land forms a second sealing surface, a height differential between said first sealing surface and said second sealing surface being a predetermined value.

3. The cylinder head gasket of claim 2, wherein said predetermined value is in the range of 0.15mm to 2 mm.

4. The cylinder head gasket of claim 2, wherein said first annular boss is of a first trapezoidal shape in cross section in an axial direction of said gasket body, an upper bottom surface of said first trapezoidal shape being said first sealing surface.

5. The cylinder head gasket of claim 2, wherein a cross section of the second annular land in the axial direction of the gasket body is a second trapezoid, an upper bottom surface of which is the second sealing surface.

6. The cylinder head gasket of claim 1, wherein said gasket body defines a mounting hole for receiving said cylinder liner, said mounting hole being disposed coaxially within said second annular ledge.

7. An engine, characterized in that it comprises a cylinder head gasket according to any one of claims 1 to 6.

8. A vehicle characterized by comprising the engine according to claim 7.

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