Cylinder cover gasket, engine and vehicle

Abstract

The utility model relates to the technical field of engines, and particularly discloses a cylinder cover gasket, an engine and a vehicle. The air blocking protrusion is arranged on the outer side of the cylinder opening sealing structure, and the water cavity sealing ring and the oil cavity sealing ring are arranged on the side, away from the cylinder opening sealing structure, of the air blocking protrusion, so that when an engine is knocked, the pressure at the position of the cylinder cover gasket is sharply increased, and a small amount of high-pressure air leaks from the cylinder opening sealing structure; and due to the arrangement of the gas blocking protrusions, leaked high-pressure gas can be blocked and shunted, and the high-pressure gas is prevented from directly impacting the water cavity sealing ring and the oil cavity sealing ring.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of engine, especially relates to a cylinder head gasket, engine and vehicle. BACKGROUND

[0002] The cylinder head gasket needs to be arranged between the cylinder head and the cylinder sleeve for sealing, on the one hand to avoid the high-pressure gas in the cylinder from leaking in large quantities and causing power weakening or loss, and on the other hand to seal the cooling water cavity and the lubricating oil cavity of the cylinder sleeve respectively. With the pursuit of engine fuel economy, the fuel form or combustion mode of the engine is changed, such as a lean-burn engine or a gas engine using combustible gas as fuel. However, for the lean-burn engine, the compression ratio is too large, and the probability of knock is greater than that of a traditional engine; for the gas engine, there is a possibility of adding inferior gas fuel during use, and the probability of knock increases sharply once inferior gas fuel is added. For the above use scenarios, under the action of knock, the engine cylinder port will inevitably have a slight leakage, and the gas pressure of the cylinder port at the moment is extremely high, which will directly impact the sealing rubber ring of the water cavity and the oil cavity, and under repeated impact, the sealing rubber ring may fall off or harden and crack, causing sealing failure, water leakage, oil leakage or water-oil mixing, and ultimately leading to major engine failures such as cylinder pulling or ring sticking. SUMMARY

[0003] The utility model aims at providing a cylinder head gasket, engine and vehicle to avoid the problem of high-pressure gas leaking directly impacting the sealing rubber ring of the water cavity and the oil cavity when the engine knocks.

[0004] The utility model provides a kind of cylinder head gasket, it is set between cylinder head and cylinder body, for sealing cylinder head and cylinder body, including cylinder gasket body, cylinder gasket body is provided with cylinder port sealing structure, water cavity sealing ring and oil cavity sealing ring, cylinder port sealing structure is used to seal cylinder port, water cavity sealing ring is used to seal cooling water cavity, oil cavity sealing ring is used to seal lubricating oil cavity, cylinder gasket body is further provided with air baffle, air baffle is spaced apart and is set at the outside of cylinder port sealing structure and extends along the circumference of cylinder port sealing structure, water cavity sealing ring and / or oil cavity sealing ring are located on the side of air baffle away from cylinder port sealing structure.

[0005] As preferred technical scheme of cylinder head gasket, cylinder port sealing structure is annular protruding structure, the protruding height of air baffle is less than the protruding height of cylinder port sealing structure.

[0006] As preferred technical scheme of cylinder head gasket, the height difference between the protruding height of air baffle and the protruding height of cylinder port sealing structure is 0.1mm-1.5mm.

[0007] As the preferred technical scheme of the cylinder head gasket, the plurality of gas blocking protrusions are arranged in a circumferential direction of the cylinder port sealing structure.

[0008] As the preferred technical scheme of the cylinder head gasket, the gas blocking protrusion is in an arc structure, and the water cavity sealing ring and the oil cavity sealing ring are located at a rear side of the gas blocking protrusion in a radial direction of the cylinder port sealing structure.

[0009] As the preferred technical scheme of the cylinder head gasket, the cylinder gasket body is further provided with a hole port sealing structure for sealing a bolt hole, and the hole port sealing structure is located at the rear side of the gas blocking protrusion.

[0010] As the preferred technical scheme of the cylinder head gasket, the cylinder gasket body is provided with a plurality of pairs of bolt holes, each of which is provided with a hole port sealing structure for sealing the bolt hole, the hole port sealing structure is in a ring protrusion structure, the gas blocking protrusion is in an arc structure, and the two ends of the gas blocking protrusion are connected with the two hole port sealing structures of one pair of bolt holes, the water cavity sealing ring and the oil cavity sealing ring are located at the rear side of the gas blocking protrusion and the hole port sealing structure in the radial direction of the cylinder port sealing structure.

[0011] As the preferred technical scheme of the cylinder head gasket, the gas blocking protrusion is tangentially arranged with the hole port sealing structure.

[0012] The utility model provides a kind of engine, including fixed connection's cylinder body and cylinder head, still include the cylinder head gasket of any one scheme described above, cylinder head gasket is arranged between cylinder head and cylinder body.

[0013] The utility model provides a kind of vehicle, including the engine of the scheme described above.

[0014] The utility model has the advantages that:

[0015] The utility model provides a kind of cylinder head gasket, by setting gas blocking protrusion in the outside of cylinder port sealing structure, and water cavity sealing ring and oil cavity sealing ring are arranged in the side of gas blocking protrusion away from cylinder port sealing structure, when knock occurs in engine, pressure at cylinder head gasket increases sharply, a small amount of high-pressure gas leaks from cylinder port sealing structure, the setting of gas blocking protrusion can block the high-pressure gas of leakage and shunt, avoid high-pressure gas directly impacting water cavity sealing ring and oil cavity sealing ring.

[0016] The utility model provides a kind of engine, by setting the cylinder head gasket in the utility model, avoid water cavity sealing ring and oil cavity sealing ring failure, reduce the failure rate of engine.

[0017] The utility model provides a kind of vehicle, by setting the engine in the utility model, reduce the failure rate under special condition or harsh working condition, reduce vehicle maintenance cost. ACCURACY OF DRAWINGS

[0018] Figure 1 Figure 1 is a structure schematic view of the cylinder head gasket in the embodiment one of the present application;

[0019] Figure 2 Figure 2 is a structure schematic view of the cylinder head gasket in the embodiment two of the present application.

[0020] In the figure:

[0021] 10, cylinder gasket body; 100, cylinder communication hole;

[0022] 1, cylinder port sealing structure; 2, orifice sealing structure; 3, water cavity sealing ring; 4, oil cavity sealing ring; 5, gas blocking protrusion. DETAILED DESCRIPTION

[0023] The technical solutions of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0024] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", are only for the purpose of description, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and moreover, the first feature is "above", "above" and "above" of the second feature, which includes the first feature above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature is "below", "below" and "below" of the second feature, which includes the first feature below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0025] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0027] Example 1

[0028] like Figure 1 As shown, this utility model provides a cylinder head gasket, which is disposed between the cylinder head and the cylinder block to seal the cylinder head and the cylinder block. As is common knowledge in the art, the cylinder block includes a cylinder and a cylinder liner. The cylinder liner has a water chamber and an oil chamber machined inside. Cooling water circulates in the water chamber for cooling, and lubricating oil flows in the oil chamber for lubricating the valve train. The sealing effect of the cylinder head gasket is reflected in the sealing of the cylinder bore, the water chamber, and the oil chamber. In this embodiment, the cylinder head gasket includes a gasket body 10, which is provided with a cylinder bore sealing structure 1, a water chamber sealing ring 3, and an oil chamber sealing ring 4. The cylinder bore sealing structure 1 seals the cylinder bore, the water chamber sealing ring 3 seals the cooling water chamber, and the oil chamber sealing ring 4 seals the lubricating oil chamber. Furthermore, the gasket body 10 also has air-blocking protrusions 5, which are spaced apart on the outside of the cylinder bore sealing structure 1 and extend circumferentially along the cylinder bore sealing structure 1. The water cavity sealing ring 3 and / or the oil cavity sealing ring 4 are located on the side of the air baffle protrusion 5 facing away from the cylinder head sealing structure 1. In this embodiment, the cylinder head gasket has a multi-layered overlapping structure, and the number of layers at the cylinder head sealing structure 1 is more than the number of layers at other locations. This forms a corrugated protrusion at the cylinder head through molding, sealing the cylinder head. The relevant structure can be referred to in the prior art and will not be described in detail here. Under normal engine operating conditions, the cylinder head sealing structure 1 ensures a sealing effect, preventing high-pressure gas leakage. When engine knock occurs, the gas pressure increases sharply, and a small amount of high-pressure gas leaks from the cylinder head sealing structure 1 and impacts outwards. Due to the air baffle protrusion 5, the leaking high-pressure gas first impacts the air baffle protrusion 5, which blocks and diverts the leaking high-pressure gas, preventing the high-pressure gas from directly impacting the water cavity sealing ring 3 and the oil cavity sealing ring 4, thereby preventing damage to the cylinder head gasket after engine knock.

[0029] Further, the cylinder port sealing structure 1 is a ring-shaped protruding structure, the protruding height of the gas blocking protrusion 5 is less than the protruding height of the cylinder port sealing structure 1, the energy of the high-pressure gas leaked from the cylinder port sealing structure 1 is quickly weakened at the gas blocking protrusion 5, and the height of the gas blocking protrusion 5 is set to be less than the protruding height of the cylinder port sealing structure 1, so that part of the leaked high-pressure gas can pass above the gas blocking protrusion 5, and in this process, the pressure of the leaked high-pressure gas is quickly reduced, on the one hand, direct impact on the water cavity sealing ring 3 and the oil cavity sealing ring 4 is avoided, and on the other hand, relatively rapid pressure relief is ensured, and the position of the cylinder port sealing structure 1 where leakage occurs is avoided from increasing. Specifically, the height difference between the protruding height of the gas blocking protrusion 5 and the protruding height of the cylinder port sealing structure 1 is 0.1mm-1.5mm, such as 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm or 1.5mm. In the process of assembling and tightening the bolts of the cylinder head and the cylinder body, the cylinder head extrudes the cylinder gasket, so that the cylinder port sealing structure 1 seals the cylinder port in the extrusion process, and the gap between the gas blocking protrusion 5 and the cylinder head tends to be zero or also extrudes in this process, to ensure that on the one hand, the water cavity sealing ring 3 and the oil cavity sealing ring 4 can be protected, and on the other hand, rapid pressure relief can be achieved after leakage occurs.

[0030] Due to space limitations, when the water cavity and the oil cavity are arranged, several water cavities and oil cavities are usually arranged along the circumference of the cylinder port to ensure good cooling and lubrication effect, therefore, the plurality of water cavities and oil cavities are dispersedly distributed along the circumference of the cylinder port. Therefore, the gas blocking protrusion 5 in the embodiment is arranged in a segmented structure, and is arranged in a plurality of gas blocking protrusions 5, which are distributed along the circumference of the cylinder port sealing structure 1. It is ensured that the gas blocking protrusion 5 is arranged between each water cavity sealing ring 3 and oil cavity sealing ring 4 and the cylinder port sealing structure 1. In the position where the water cavity sealing ring 3 or the oil cavity sealing ring 4 is not arranged, the gas blocking protrusion 5 can not be arranged, to reduce the structural complexity and manufacturing cost.

[0031] Further, the gas blocking protrusion 5 is an arc-shaped structure, and is coaxially arranged with the cylinder port sealing structure 1. Along the radial direction of the cylinder port sealing structure 1, the water cavity sealing ring 3 and the oil cavity sealing ring 4 are located behind the gas blocking protrusion 5. For details, please refer to the dashed line part shown in Figure 1 , two extension lines are obtained by connecting the center point of the cylinder port sealing structure 1 to the two end points of the gas blocking protrusion 5 structure respectively and extending the two lines outward along the radial direction of the cylinder port sealing structure 1, the two extension lines and the contour line of the gas blocking protrusion 5 form a gas blocking protection area, and the water cavity sealing ring 3 and the oil cavity sealing ring 4 are located in the gas blocking protection area, so that they are not directly impacted by the high-pressure gas.

[0032] Further, the cylinder head gasket is also provided with bolt holes, and the cylinder gasket body 10 is also provided with hole sealing structures 2 for sealing the bolt holes, which are also annular protruding structures. The hole sealing structures 2 are located behind the air blocking protrusions 5, and specifically, the hole sealing structures 2 are also located in the air blocking protection area. If the hole sealing structures 2 are located outside the air blocking protection area, since they are annular protruding structures, when directly impacted by high-pressure gas or impacted by high-pressure gas after being guided by the air blocking protrusions 5, the annular protruding structures will guide the high-pressure gas, which may impact the water cavity sealing ring 3 or the oil cavity sealing ring 4. Therefore, by locating the hole sealing structures 2 in the air blocking protection area behind the air blocking protrusions 5, the hole sealing structures 2 are effectively prevented from guiding the high-pressure gas to impact the water cavity sealing ring 3 or the oil cavity sealing ring 4.

[0033] Embodiment Two

[0034] In this embodiment, only the partial structure is different from that in Embodiment One, and therefore, in order to avoid repeated description, only the differences from Embodiment One will be described in this embodiment. The differences between this embodiment and Embodiment One are embodied in the arrangement position of the air blocking protrusions 5, which is different from that in Embodiment One.

[0035] Please refer to Figure 2 It is shown that the cylinder gasket body 10 is provided with multiple pairs of bolt holes, and the outer periphery of each bolt hole is provided with a hole sealing structure 2 for sealing the bolt hole, which is an annular protruding structure. That is, the cylinder gasket body 10 is also correspondingly provided with multiple pairs of annular protruding hole sealing structures 2 corresponding to the bolt holes. The air blocking protrusions 5 are arranged in an arc structure and coaxially arranged with the cylinder port sealing structure 1. The two ends of the air blocking protrusions 5 are connected with the two hole sealing structures 2 of one pair of bolt holes, respectively, to form a composite structure with a circular ring shape at the two ends and a circular arc shape in the middle. Along the radial direction of the cylinder port sealing structure 1, the water cavity sealing ring 3 and the oil cavity sealing ring 4 are located behind the air blocking protrusions 5 and the hole sealing structures 2. Please refer to Figure 2 It is shown that the cylinder gasket body 10 is provided with multiple pairs of bolt holes, and the outer periphery of each bolt hole is provided with a hole sealing structure 2 for sealing the bolt hole, which is an annular protruding structure. That is, the cylinder gasket body 10 is also correspondingly provided with multiple pairs of annular protruding hole sealing structures 2 corresponding to the bolt holes. The air blocking protrusions 5 are arranged in an arc structure and coaxially arranged with the cylinder port sealing structure 1. The two ends of the air blocking protrusions 5 are connected with the two hole sealing structures 2 of one pair of bolt holes, respectively, to form a composite structure with a circular ring shape at the two ends and a circular arc shape in the middle. Along the radial direction of the cylinder port sealing structure 1, the water cavity sealing ring 3 and the oil cavity sealing ring 4 are located behind the air blocking protrusions 5 and the hole sealing structures 2. Please refer to

[0036] Optionally, the air baffle 5 is tangent to the orifice sealing structure 2, so that the curvature changes smoothly at the connecting position of the air baffle 5 and the orifice sealing structure 2, and there is no obstacle on the path of the high-pressure gas discharged along the air baffle 5 or the orifice sealing structure 2 after the high-pressure gas impacts the air baffle 5 or the orifice sealing structure 2, so that vortex is avoided and rapid discharge and pressure relief are ensured.

[0037] The utility model provides a kind of engine, including fixed connection's cylinder and cylinder head, further include the cylinder head gasket in the utility model embodiment, cylinder head gasket is arranged between cylinder head and cylinder.The cylinder head gasket in this embodiment is set, avoid water cavity sealing ring 3 and oil cavity sealing ring 4 failure, reduce the failure rate of engine.

[0038] The utility model provides a kind of vehicle, by setting the engine in the utility model embodiment, reduce the failure rate under special condition or harsh working condition, reduce vehicle maintenance cost.

[0039] Obviously, the above embodiments of the utility model are only for clear illustration of the utility model, and not the limitation of the implementation mode of the utility model. For ordinary skilled person in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all implementation modes need not and cannot be exhausted. Any modification, equivalent replacement and improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A cylinder head gasket, disposed between a cylinder head and a cylinder block, for sealing the cylinder head and the cylinder block, characterized in that, include: Cylinder gasket body (10), wherein the cylinder gasket body (10) is provided with cylinder port sealing structure (1), water cavity sealing ring (3) and oil cavity sealing ring (4), wherein the cylinder port sealing structure (1) is used to seal the cylinder port, the water cavity sealing ring (3) is used to seal the cooling water cavity, and the oil cavity sealing ring (4) is used to seal the lubricating oil cavity. The cylinder head gasket body (10) is also provided with air-blocking protrusions (5), which are spaced apart on the outside of the cylinder head sealing structure (1) and extend along the circumference of the cylinder head sealing structure (1). The water cavity sealing ring (3) and / or the oil cavity sealing ring (4) are located on the side of the air-blocking protrusions (5) away from the cylinder head sealing structure (1).

2. The cylinder head gasket according to claim 1, characterized in that, The cylinder port sealing structure (1) is an annular protrusion structure, and the protrusion height of the air-blocking protrusion (5) is less than the protrusion height of the cylinder port sealing structure (1).

3. The cylinder head gasket according to claim 2, characterized in that, The height difference between the protrusion height of the air baffle protrusion (5) and the protrusion height of the cylinder sealing structure (1) is 0.1mm-1.5mm.

4. The cylinder head gasket according to claim 2, characterized in that, The air-blocking protrusions (5) are configured as a plurality of protrusions, which are distributed circumferentially along the cylinder port sealing structure (1).

5. The cylinder head gasket according to any one of claims 1-4, characterized in that, The air baffle protrusion (5) has an arc-shaped structure. Along the radial direction of the cylinder port sealing structure (1), the water cavity sealing ring (3) and the oil cavity sealing ring (4) are both located behind the air baffle protrusion (5).

6. The cylinder head gasket according to claim 5, characterized in that, The cylinder head gasket body (10) is also provided with an orifice sealing structure (2) for sealing bolt holes, and the orifice sealing structure (2) is located behind the air baffle protrusion (5).

7. The cylinder head gasket according to any one of claims 1-4, characterized in that, The cylinder head gasket body (10) is provided with multiple pairs of bolt holes. Each bolt hole is provided with an orifice sealing structure (2) for sealing the bolt hole. The orifice sealing structure (2) is an annular protrusion structure. The air-blocking protrusion (5) is an arc-shaped structure. Its two ends are respectively connected to the two orifice sealing structures (2) of one pair of bolt holes. Along the radial direction of the cylinder head sealing structure (1), the water cavity sealing ring (3) and the oil cavity sealing ring (4) are both located behind the air-blocking protrusion (5) and the orifice sealing structure (2).

8. The cylinder head gasket according to claim 7, characterized in that, The air-blocking protrusion (5) is tangentially arranged with the orifice sealing structure (2).

9. An engine, comprising a cylinder block and a cylinder head fixedly connected together, characterized in that, It also includes the cylinder head gasket according to any one of claims 1-8, wherein the cylinder head gasket is disposed between the cylinder head and the cylinder block.

10. A vehicle, characterized in that, Includes the engine as described in claim 9.

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