KR19990002038U - Gasket structure of the engine - Google Patents

Abstract

The present invention relates to a gasket structure of an engine, and in the gasket structure of an engine in which the gasket 20 is inserted between the cylinder head 10 and the flanges 11 and 31 of the cylinder head cover 30, the cylinder head ( The protrusion 12 is formed on the upper surface of the flange 11 of the 10, the groove 21 is inserted into the protrusion 12 of the cylinder head 10 on the bottom of the gasket 20, The gasket structure of the engine, characterized in that the cylinder head cover 30 is coupled to the upper surface of the gasket 20 is provided, thereby preventing the leakage of engine oil or engine mixture gas even if the vehicle is used for a long time, This has the effect of keeping the output in good condition.

Description

Gasket structure of the engine

(Technology field)

The present invention relates to a gasket structure of an engine, and more particularly, to maintain the air gap between the cylinder head and the cylinder block and the gap formed between the cylinder head and the cylinder head cover to keep the engine oil and the mixed fuel gas tight. Relates to a cylinder head gasket and a cylinder head cover gasket to prevent leakage.

(Prior art)

The cylinder head, which forms part of the combustion chamber of the engine and is provided with an intake and exhaust manifold, a spark plug, a valve mechanism, and the like, is assembled to the upper part of the cylinder block via the cylinder head gasket, and the cylinder head is connected to the upper part of the cylinder head via the cylinder head gasket. The head cover is assembled.

The engine is operated by a principle of burning a mixed gas of fuel and air in a combustion chamber formed by a cylinder block and a cylinder head, reciprocating a piston at a pressure generated at this time, and converting the piston into a rotary motion through a crank mechanism. The cylinder head and cylinder block are not only exposed to high pressure and high temperature environments, but also constantly receive strong and repetitive loads due to the movement of the piston.

This load on the engine has a particularly intensive effect on the connection between the cylinder block and the cylinder head, which are weak areas of the engine. Therefore, the cylinder head gasket inserted at the connection between the cylinder head and the cylinder block for sealing purposes is always in a poor environment, and in fact, after about two to three years, the cylinder head gasket is deformed by heat and pressure, thereby achieving a perfect sealing performance. It will not work.

Degradation of the cylinder head gasket causes leakage of engine oil supplied to the cylinder head and cylinder block for lubrication of the engine and, in severe cases, leakage of compressed mixed fuel in the combustion chamber.

As such, the leakage of engine oil and fuel leads to deterioration of engine performance, shortening of the surface, and causing pollution, and in particular, the leakage of fuel can lead to vehicle fires even in small accidents, so the sealing of the cylinder head gasket is as perfect as possible. It must be done and its life must be long.

On the other hand, the inside of the cylinder head forms the combustion chamber of the engine together with the upper part of the cylinder block, and the outside of the cylinder head is fixed to the cylinder block with several holes for mounting the intake and exhaust manifold, valve mechanism, spark plug, and the like. Bolt holes, journals for supporting the camshaft, and the like are formed.

The cylinder head cover generally covers the gasket in order to prevent the cam head, the valve mechanism, the spark plug, etc., mounted thereon from being damaged by foreign substances or moisture that may be introduced from the outside, and to reduce the function or shorten the life. Is tightened with a bolt.

The cylinder head cover gasket is usually made of synthetic rubber, and serves to seal leakage of lubricating oil or fuel into the gap between the cylinder head and the cylinder head cover. That is, when the bolt is tightened through the gasket between the cylinder head and the cylinder head cover, the gasket is in close contact between the cylinder head and the cylinder head cover to prevent oil leakage. Therefore, the degradation of the performance of the cylinder head cover gasket can cause leakage of the engine oil and the compressed mixed fuel as well as the performance of the cylinder head gasket.

1 is an exploded perspective view of a cylinder head portion of an engine showing an installation position of a cylinder head cover gasket, and FIG. 2 is a sectional view of a conventional cylinder head cover gasket.

As shown in Fig. 1 and Fig. 2, the cylinder head cover gasket 20 is inserted between the cylinder head 10 and the flanges 11 and 31 of the cylinder head cover 30.

However, in the conventional cylinder head cover gasket, when the engine is inspected after 2 to 3 years of use of the vehicle, the engine oil is frequently leaked from the cylinder head cover gasket 20 to be contaminated with foreign substances such as dust. In some cases, fuel leakage occurs. This is due to the deterioration of the sealing performance of the cylinder head cover gasket 20, and such leakage of the engine oil causes problems such as deterioration of the engine performance, shortening of the water surface, and causing pollution and possible fire, as described above. Although not shown, the same is true of the cylinder head gasket.

The main object of the present invention is to solve the above problems by improving the sealing performance of the cylinder head gasket and the cylinder head cover gasket installed at the connection portion of the cylinder head and the cylinder block and at the connection portion of the cylinder head and the cylinder head cover. It is.

1 is an exploded perspective view of a cylinder head portion of an engine showing an installation position of a cylinder head cover gasket.

2 is a cross-sectional view of a conventional cylinder head cover gasket.

Figure 3 is a cross-sectional view of the connection portion of the cylinder head cover and the cylinder head showing an example of the structure of the engine gasket according to the present invention.

Explanation of symbols on the main parts of the drawings

10: cylinder block 11: flange

12: protrusion 20: gasket

21: groove portion 30: cylinder head

31: flange

In order to achieve the above object, the present invention in the gasket structure of the engine in which a gasket is inserted between the flange of the cylinder head and the cylinder head cover, forming a protrusion on the upper surface of the flange of the cylinder head and the cylinder head on the bottom of the gasket Forming a groove portion for inserting the projection of the, is configured by coupling the cylinder head cover to the upper surface of the gasket as a basic feature of the technical configuration.

In addition, the present invention is a gasket structure of the engine in which the gasket is inserted between the cylinder block and the flange of the cylinder head, the groove portion for forming a protrusion on the upper surface of the flange of the cylinder block and inserting the protrusion of the cylinder block on the bottom of the gasket And a cylinder head coupled to an upper surface of the gasket is a basic feature of the technical configuration.

Hereinafter, with reference to the accompanying drawings will be described in detail the gasket structure of the engine according to the present invention. The following specific examples merely illustrate the gasket structure of the engine according to the present invention, but do not limit the scope of the gasket structure of the engine according to the present invention.

Figure 3 is a cross-sectional view of the connection portion of the cylinder head cover and the cylinder head showing an example of the structure of the engine gasket according to the present invention. As shown in Fig. 3, the structure of the gasket according to the present invention is inserted into the cylinder head cover gasket 20 between the cylinder head 10 and the flanges 11 and 31 of the cylinder head cover 30 as in the prior art. have.

According to a feature of the present invention, a protrusion 12 is formed on an upper surface of the flange 11 of the cylinder head 10, and a protrusion 12 of the cylinder head 10 is inserted into a bottom surface of the gasket 20. Groove 21 is formed. The cylinder head cover 30 is fastened to the upper surface of the gasket 20.

The gasket 20 is inserted between the flange 11 of the cylinder head 10 and the flange 31 of the cylinder head cover 30 and fastened up and down with a fastening means such as a bolt / nut.

Referring to the operation of the present invention is as follows.

The flange 20 of the cylinder head 10 has a structure in which a step is formed by inserting the groove portion 21 formed on the bottom surface of the gasket 20 into the protrusion 12 formed on the upper surface of the flange 11 of the cylinder head 10. Since the coupling is inserted between the 11 and the flange 31 of the cylinder head cover 30, even if the vehicle is used for a long time, it is double-sealed to maintain the sealing performance continuously. This prevents the leakage of engine oil or engine mixture gas, thereby keeping the engine output in good condition.

Since the cylinder head gasket inserted between the cylinder block and the flange of the cylinder head can also be configured in the same way as the above-described cylinder head cover gasket, the detailed description thereof is omitted.

According to the gasket structure of the engine according to the present invention described above, according to the structure in which the groove formed on the bottom surface of the gasket is coupled to the protrusion formed on the flange of the cylinder head or the flange of the cylinder block and double-sealed, even if the vehicle is used for a long time Since it is possible to prevent the leakage of engine oil or engine mixture gas, there is an effect that can keep the engine output in a good state continuously.

Claims (2)

In a gasket structure of an engine in which a gasket is inserted between a cylinder head and a flange of a cylinder head cover, a protrusion is formed on an upper surface of the flange of the cylinder head, and a groove is inserted into the protrusion of the cylinder head at a bottom of the gasket. And a cylinder head cover is coupled to an upper surface of the gasket. In a gasket structure of an engine in which a gasket is inserted between a cylinder block and a flange of a cylinder head, a protrusion is formed on an upper surface of the flange of the cylinder block, and a groove is inserted into the protrusion of the cylinder block on the bottom of the gasket. And a cylinder head coupled to an upper surface of the gasket.