Engine cylinder head sealing gasket

Abstract

The invention provides an engine cylinder head sealing gasket. The sealing gasket is formed by connecting an upper elastic plate, a base plate and a lower elastic plate, wherein the base plate is arranged between the elastic plate and the lower elastic plate, the upper elastic plate and the lower elastic plate are separately provided with a groove along the edges of cylinder holes, the two grooves are symmetrical and have the same size; and a gasket is arranged between the upper elastic plate and the base plate and among the cylinder holes of the sealing gasket and is integrated with the base plate, namely the gasket is arranged on one side, near a cylinder cover, of the base plate and is only arranged among the cylinder holes. By using the above structure, the compressed thickness of the weak region of the cylinder is increased, and when the sealing gasket is under the pressure of bolts, more pressure can be distributed to the position among the cylinder holes, thus the amount of compression of the grooves on the elastic plates is increased, good sealing effect can be obtained, the cylinder can maintain sealed under high explosive pressure and fuel gas can not leak. Therefore, the flanging structure can not be used and the service life of the sealing gasket is increased.

Description

Technical field: [0001] The invention relates to the sealing of an engine combustion chamber, in particular to an engine cylinder head gasket. Background technique: [0002] At present, there are many kinds of engine cylinder head gaskets used in the market. The common one is composed of an upper elastic plate, a base plate and a lower elastic plate. The upper and lower elastic plates have flanging at the cylinder hole to wrap the base plate. This kind of cylinder head gasket can meet the sealing requirements when the engine is used with low explosion pressure, but when the engine is used with high explosion pressure, because the flanging is close to the cylinder hole, the force is not uniform, so that the force on the local area of ​​the cylinder hole is small , the sealing performance is poor, gas leakage occurs, and it is easy to form fatigue failure under high explosion pressure, resulting in a decrease in service life, and it is difficult to ensure its position and heig...

AI Technical Summary

Problems solved by technology

This kind of cylinder head gasket can meet the sealing requirements when the engine is used with low explosion pressure, but when the engine is used with high explosion pressure, because the flanging is close to the cylinder hole, the force is not uniform, so that the force on the local area of ​​the cylinder hole is small , the sealing performance is poor, gas leakage occurs, and it is easy to form fatigue failure under high explosion pressure, resulting in a decrease in service life, and it is difficult to ensure its position and height when the flange is turned, which puts high requirements on the production process

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