CN212690202U - Engine - Google Patents

Abstract

The present application provides an engine. The engine includes: cylinder body, cylinder cap and cylinder gasket, the cylinder gasket is located between cylinder body and the cylinder cap, wherein, be equipped with sealed muscle on the first sealing surface of cylinder gasket orientation cylinder body or cylinder cap, be equipped with the boss on the second sealing surface of cylinder body or cylinder cap orientation first sealing surface, when cylinder body cylinder cap lid closes on the cylinder body, boss and the crisscross distribution of sealed muscle, the boss does not include the regional contact of sealed muscle with first sealing surface, sealed muscle and the regional contact of the sealed face of second not including the boss. Therefore, in the operating condition of the engine, when the gap between the cylinder body and the cylinder cover is reduced, the boss can share sealing pressure for the sealing rib, the sealing rib is protected, and the fatigue performance of the sealing rib is improved. When the clearance between the cylinder body and the cylinder cover is increased, the boss is separated from the first sealing surface. At the moment, the sealing pressure applied by the cylinder cover or the cylinder body is completely acted on the sealing rib, so that the sealing effect of the sealing rib is better.

Description

Engine

Technical Field

The embodiment of the application relates to the technical field of vehicle sealing, in particular to an engine.

Background

With the light weight design of automobiles, the weight reduction tendency of a cylinder body and a cylinder cover in an engine is obvious. For example, the engine block is usually made of cast iron, which has the advantage of high rigidity and can carry large power and torque output, thereby maximizing the performance of the engine. With the light weight design of automobiles, cast iron cylinder bodies are gradually replaced by cast aluminum cylinder bodies. However, the cast aluminum cylinder has insufficient rigidity, and the thermal surface of the cylinder and the cylinder cover is greatly deformed in the operating condition of the high-temperature and high-pressure engine, so that the sealing performance and the fatigue performance of the gasket sealing rib are reduced, and the sealing rib is easy to crack.

SUMMERY OF THE UTILITY MODEL

In view of this, an object of the present invention is to provide an engine, so as to overcome the problem that the cylinder block and the cylinder head have large thermal surface deformation under the high-temperature and high-pressure operating condition of the engine in the prior art, so that the sealing performance and fatigue performance of the gasket are reduced, and the gasket is prone to crack.

An embodiment of the present application provides an engine, including: cylinder body, cylinder cap and cylinder gasket, the cylinder gasket is located between cylinder body and the cylinder cap, wherein, be equipped with sealed muscle on the first sealing surface of cylinder gasket orientation cylinder body or cylinder cap, be equipped with the boss on the second sealing surface of cylinder body or cylinder cap orientation first sealing surface, when cylinder body cylinder cap lid closes on the cylinder body, boss and the crisscross distribution of sealed muscle, the boss does not include the regional contact of sealed muscle with first sealing surface, sealed muscle and the regional contact of the sealed face of second not including the boss.

Optionally, in a specific embodiment of the present application, the second sealing surface is provided with a plurality of bosses, and when the cylinder body and the cylinder cover are covered on the cylinder body, the plurality of bosses are located on the same side of the sealing rib.

Optionally, in a specific embodiment of the present application, the second sealing surface is provided with a plurality of bosses, and when the cylinder body and the cylinder cover are covered on the cylinder body, the plurality of bosses are respectively located at two sides of the sealing rib.

Optionally, in an embodiment of the present application, when the cylinder block and the cylinder cover are covered on the cylinder block, the bosses located at two sides of the sealing rib are arranged two by two symmetrically with the sealing rib as a center line.

Alternatively, in a specific embodiment of the present application, the axial heights of the plurality of boss protruding portions are the same.

Optionally, in a specific embodiment of the present application, the axial heights of at least two boss protrusion portions are different.

Optionally, in a specific embodiment of the present application, the at least two bosses differ in shape and/or size.

Optionally, in a specific embodiment of the present application, at least two sealing ribs are disposed on the first sealing surface, and when the cylinder head covers the cylinder body, the boss is located in a middle area between the two sealing ribs.

Optionally, in a specific embodiment of the present application, the sealing rib is a raised full-corrugated sealing rib or a half-corrugated sealing rib.

Optionally, in a specific embodiment of the present application, the gasket includes at least two layers of gaskets, and when the at least two layers of gaskets are stacked, an outer side surface of the gasket facing the cylinder block or the cylinder head is the first sealing surface.

As can be seen from the above technical solutions, an embodiment of the present application provides an engine, including: cylinder body, cylinder cap and cylinder gasket, the cylinder gasket is located between cylinder body and the cylinder cap, wherein, be equipped with sealed muscle on the first sealing surface of cylinder gasket orientation cylinder body or cylinder cap, be equipped with the boss on the second sealing surface of cylinder body or cylinder cap orientation first sealing surface, when cylinder body cylinder cap lid closes on the cylinder body, boss and the crisscross distribution of sealed muscle, the boss does not include the regional contact of sealed muscle with first sealing surface, sealed muscle and the regional contact of the sealed face of second not including the boss. Therefore, in the operating condition of the engine, when the gap between the cylinder body and the cylinder cover is reduced, the boss can share sealing pressure for the sealing rib, the sealing rib is protected, and the fatigue performance of the sealing rib is improved. When the clearance between the cylinder body and the cylinder cover is increased, the boss is separated from the first sealing surface. At the moment, the sealing pressure applied by the cylinder cover or the cylinder body is completely acted on the sealing rib, so that the sealing effect of the sealing rib is better.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the embodiments of the present application, and other drawings can be obtained by those skilled in the art according to the drawings.

FIG. 1 is an exploded view of an engine according to one embodiment of the present disclosure;

FIG. 2 is a schematic illustration of the engine block and the cylinder head gasket according to an embodiment of the present disclosure;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2 of an engine according to one embodiment of the present disclosure;

FIG. 4 is a sectional view taken along line B-B of FIG. 2 of an engine according to an embodiment of the present disclosure.

Reference numerals:

101. a cylinder body; 102. a cylinder cover; 103. a cylinder gasket; 104. a first sealing surface; 105. sealing the ribs; 115. a full corrugated sealing rib; 125. a semi-corrugated sealing rib; 106. a second sealing surface; 107. and (4) a boss.

Detailed Description

Of course, it is not necessary for any particular embodiment of the present application to achieve all of the above advantages at the same time.

In order to make those skilled in the art better understand the technical solutions in the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application shall fall within the scope of the protection of the embodiments in the present application.

The following further describes specific implementations of embodiments of the present application with reference to the drawings of the embodiments of the present application.

Example one

As shown in fig. 1, the engine of the present embodiment includes: the cylinder gasket 103 is positioned between the cylinder body 101 and the cylinder cover 102, wherein a first sealing surface 104 of the cylinder gasket 103 facing the cylinder body 101 or the cylinder cover 102 is provided with a sealing rib 105, a second sealing surface 106 of the cylinder body 101 or the cylinder cover 102 facing the first sealing surface 104 is provided with a boss 107, when the cylinder cover 102 covers the cylinder body 101, the boss 107 and the sealing rib 105 are distributed in a staggered mode, the boss 107 and the first sealing surface 104 do not comprise the area contact of the sealing rib 105, and the sealing rib 105 and the second sealing surface 106 do not comprise the area contact of the boss 107.

In this embodiment, when the cylinder head 102 is closed on the cylinder block 101, the seal bead 105 is sandwiched by the first seal surface 104 and the second seal surface 106, whereby the seal bead 105 receives a sealing pressure applied by the cylinder block 101 or the cylinder head 102. In the engine operation condition, the thermal power surface of the cylinder block 101 and the cylinder head 102 is greatly deformed, and the cylinder gasket 103 is pressed by the cylinder block 101 and the cylinder head 102, so that the sealing pressure applied to the sealing rib 105 is increased. When the sealing rib 105 is subjected to excessive sealing pressure, the sealing rib 105 may be cracked. In order to protect the sealing rib 105, a boss 107 is provided on the second sealing surface 106, and when the cylinder head 102 is closed on the cylinder body 101, the boss 107 and the sealing rib 105 are alternately distributed between the first sealing surface 104 and the second sealing surface 106. In the operating condition of the engine, when the gap between the cylinder block 101 and the cylinder head 102 is reduced, the boss 107 can share the sealing pressure for the sealing rib 105, protect the sealing rib 105, and improve the fatigue performance of the sealing rib 105. When the gap between the cylinder block 101 and the cylinder head 102 increases, the boss 107 separates from the first sealing surface 104. At this time, the sealing pressure applied by the cylinder cover 102 or the cylinder body 101 is completely applied to the sealing rib 105, so that the sealing effect of the sealing rib 105 is better, the leakage of gas, oil, cooling liquid, water and the like of the engine is avoided, and the reliability of the engine sealing is improved.

In this embodiment, the arrangement space of the cylinder body 101 and the cylinder cover 102 is large, and the boss 107 is manufactured on the cylinder body 101 or the cylinder cover 102, so that the boss 107 can be arranged more flexibly.

Alternatively, the second sealing surface 106 is provided with a plurality of bosses 107, and when the cylinder head 102 is closed on the cylinder body 101, the plurality of bosses 107 are all located on the same side of the sealing rib 105. Therefore, the boss 107 can be processed and manufactured on the cylinder body 101 or the cylinder cover 102 more conveniently and quickly, and the cylinder body 101, the cylinder cover 102 and the cylinder gasket 103 can be assembled together more conveniently.

Alternatively, as shown in fig. 2 and 4, the second sealing surface 106 is provided with a plurality of bosses 107, and when the cylinder head 102 is closed on the cylinder block 101, the plurality of bosses 107 are respectively located on both sides of the seal rib 105. Therefore, the bosses 107 can be supported between the first sealing surface 104 and the second sealing surface 106 at two sides of the sealing rib 105, so that the pressure on the two sides of the sealing rib 105 is balanced, the situation of stress concentration on the sealing rib 105 is prevented, and the protection effect on the sealing rib 105 is better.

Alternatively, when the cylinder head 102 is closed on the cylinder body 101, the bosses 107 on both sides of the seal rib 105 are arranged symmetrically with the seal rib 105 as a center line. Therefore, the arrangement position of the boss 107 can be simply determined, and the processing difficulty of the boss 107 is reduced. And the bosses 107 are arranged pairwise symmetrically with the sealing ribs 105 as central lines, so that the sealing pressure on two sides of the sealing ribs 105 is uniform, and the protection effect on the sealing ribs 105 is improved.

Alternatively, the axial heights of the protruding portions of the plurality of bosses 107 are the same, so that when the cylinder head 102 is closed on the cylinder block 101, the plurality of bosses 107 can all contact with the area of the first sealing surface 104 that does not include the sealing rib 105, i.e., the plurality of bosses 107 jointly support the first sealing surface 104, thereby providing better protection for the sealing rib 105. Moreover, the axial heights of the protruding parts of the bosses 107 are the same, so that the difficulty in machining and manufacturing the bosses 107 can be reduced.

Optionally, the axial height of the protruding portions of at least two of the bosses 107 is different. In order to make the plurality of bosses 107 contact the region of the first sealing surface 104 that does not include the seal rib 105 when the cylinder head 102 is closed on the cylinder block 101 in the case where the second sealing surface 106 on the cylinder head 102 is not a flat surface, the axial height of the protruding portion of the boss 107 located in the protruding or recessed region may be correspondingly set according to the condition of the protruding or recessed region of the second sealing surface 106, so that the axial heights of the protruding portions of at least two bosses 107 are different.

Optionally, at least two of the bosses 107 are different in shape and/or size. Thus, the boss 107 can be adaptively designed according to the shape of the first sealing surface 104 or the shape of the second sealing surface 106 to enhance the protection effect of the seal rib 105.

For example, the shape, size, etc. of the boss 107 are designed according to experience or wear and tear of the head gasket 103 in actual use. If a region of the head gasket 103 is worn seriously, the boss 107 corresponding to the region can be shaped to have a large width. In the area with slight abrasion, the shape of the boss 107 corresponding to the area can be designed to be smaller.

For example, the shape of the boss 107 corresponding to the area may be designed according to the shape of the gasket 103, and the shape of the boss 107 may be formed by a basic geometric shape, such as a rectangle, a circle, or the like, or may be formed by a combination of a plurality of basic geometric shapes. As shown in fig. 2, one of the bosses 107 has a rectangular shape, and one side of the boss 107 is disposed parallel to the seal rib 105. The other boss 107 is rectangular and is provided with a semicircular notch to avoid structures such as oil holes and water holes on the cylinder gasket 103.

Alternatively, as shown in fig. 2 and 3, at least two sealing ribs 105 are provided on the first sealing surface 104, and when the cylinder head 102 is closed on the cylinder block 101, the boss 107 is located in the middle area of the two sealing ribs 105. Thus, two sealing ribs 105 can be protected by one boss 107, so that the number of the bosses 107 used is reduced, and the workload for manufacturing the bosses 107 is reduced.

Alternatively, the widths of at least two sealing ribs 105 are set to be equal, so that the balance of the distribution of the sealing pressure at this position can be improved to improve the sealing effect.

Optionally, the sealing rib 105 is a raised full-corrugated sealing rib 115 or a half-corrugated sealing rib 125.

The full-corrugated sealing rib 115 has high sealing pressure and good sealing effect, and can be used for sealing a combustion chamber hole of an engine. The full wave seal rib 115 is formed in a convex arch shape, and has a planar structure at the top end of the arch shape.

The half-wave rib 125 is formed in a slope shape, and may be used to seal a gas hole, an oil hole, a coolant hole, and the like.

Alternatively, the side of the sealing rib 105 that contacts the area of the second sealing surface 106 that does not include the boss 107 is coated with a resin coating. By applying the resin coating, the attenuation of the elastic force of the sealing rib 105 can be effectively prevented, so that the sealing effect can be ensured. Wherein the resin coating is made of fluororubber material

Optionally, the gasket 103 comprises at least two layers of gaskets, and when the at least two layers of gaskets are stacked, the outer side of the gasket facing the cylinder block 101 or the cylinder head 102 is the first sealing surface 104.

Wherein, the gasket 103 comprises two layers of gaskets, and the two layers of gaskets are arranged oppositely. Thus, the sealing rib 105 on the first sealing surface 104 of any gasket can be selected according to the specific requirements of the actual application. Sealing ribs 105 may be provided on the first sealing surface 104 of the two-layer gasket, so that the sealing ribs 105 are provided on both the first sealing surface 104 of the gasket 103 facing the cylinder block 101 and the first sealing surface 104 facing the cylinder head 102, thereby improving the sealing effect.

The gasket 103 includes a plurality of layers of gaskets, and an outer side surface of the gasket facing the cylinder block 101 or the cylinder head 102 is a first sealing surface 104. While the spacer in the middle can be used to adjust the thickness of the gasket 103, so that the thickness of the gasket 103 can be adjusted to fit the width of the gap between the cylinder block 101 and the cylinder head 102, resulting in a better sealing effect when the cylinder head 102 is closed on the cylinder block 101.

The type of the gasket 103 can be selected according to the actual application. For example, the gasket 103 includes a metal base layer type gasket, a metal rubber type gasket, a metal retainer type gasket, and the like.

As can be seen from the above embodiments of the present application, the engine in the present embodiment includes the cylinder block 101, the cylinder head 102, and the cylinder gasket 103 is located between the cylinder block 101 and the cylinder head 102, wherein the first sealing surface 104 of the cylinder gasket 103 facing the cylinder block 101 or the cylinder head 102 is provided with the sealing rib 105, the second sealing surface 106 of the cylinder block 101 or the cylinder head 102 facing the first sealing surface 104 is provided with the boss 107, and when the cylinder block 101 and the cylinder head 102 are closed on the cylinder block 101, the boss 107 and the sealing rib 105 are arranged in parallel between the first sealing surface 104 and the second sealing surface 106. In the operating condition of the engine, when the gap between the cylinder body 101 and the cylinder head 102 is reduced, the boss 107 can share the sealing pressure for the sealing rib 105, so that the sealing rib 105 is protected, and the fatigue performance of the sealing rib 105 is improved. When the gap between the cylinder block 101 and the cylinder head 102 increases, the boss 107 separates from the first sealing surface 104. At this time, the sealing pressure applied by the cylinder cover 102 or the cylinder body 101 is completely applied to the sealing rib 105, so that the sealing effect of the sealing rib 105 is better, the leakage of the engine is avoided, and the sealing reliability of the engine is improved.

Of course, it is not necessary for any particular embodiment of the present application to achieve all of the above advantages at the same time.

It should be noted that, according to the implementation requirement, each component/step described in the embodiment of the present application may be divided into more components/steps, and two or more components/steps or partial operations of the components/steps may also be combined into a new component/step to achieve the purpose of the embodiment of the present application.

While preferred embodiments of the present application have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the true scope of the embodiments of the application. It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. Thus, if such modifications and variations of the embodiments of the present application fall within the scope of the claims of the embodiments of the present application and their equivalents, the embodiments of the present application are intended to include such modifications and variations as well.

Claims (10)

1. An engine, comprising: a cylinder block, a cylinder head, and a cylinder gasket, the cylinder gasket being located between the cylinder block and the cylinder head, wherein,

the cylinder gasket is provided with a sealing rib on a first sealing surface facing the cylinder body or the cylinder cover, the cylinder body or the cylinder cover is provided with a boss on a second sealing surface facing the first sealing surface, when the cylinder body and the cylinder cover are closed on the cylinder body, the bosses and the sealing rib are distributed in a staggered mode, the bosses and the first sealing surface do not comprise the region contact of the sealing rib, and the sealing rib and the second sealing surface do not comprise the region contact of the bosses.

2. The engine of claim 1, wherein the second sealing surface is provided with a plurality of bosses, and when the cylinder head covers the cylinder body, the bosses are all positioned on the same side of the sealing rib.

3. The engine of claim 1, wherein the second sealing surface is provided with a plurality of bosses, and when the cylinder head covers the cylinder body, the bosses are respectively positioned at two sides of the sealing rib.

4. The engine according to claim 3, wherein when the cylinder block and the cylinder head cover are closed on the cylinder block, the bosses on both sides of the sealing rib are arranged in pairwise symmetry with the sealing rib as a center line.

5. The engine of claim 1, wherein the axial heights of the plurality of boss protrusion portions are the same.

6. The engine of claim 1, wherein at least two of said boss protrusion portions differ in axial height.

7. An engine according to claim 1, wherein at least two of the bosses differ in shape and/or size.

8. An engine according to claim 1, wherein the first sealing surface is provided with at least two sealing ribs, and the boss is located in a region intermediate the two sealing ribs when the cylinder head is closed on the cylinder block.

9. The engine of any of claims 1-8, characterized in that the sealing rib is a raised full-corrugated sealing rib or a half-corrugated sealing rib.

10. The engine of claim 1, wherein the cylinder head gasket comprises at least two layers of gaskets, and when the at least two layers of gaskets are stacked, the outer side of the gasket facing the cylinder block or the cylinder head is a first sealing surface.

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