Engine cylinder gasket sealing structure

Abstract

The invention discloses an engine cylinder gasket sealing structure. The engine cylinder gasket sealing structure comprises an air cylinder body and an air cylinder cover arranged on the air cylinderbody, wherein an air cylinder sleeve is arranged in the air cylinder body. The engine cylinder gasket sealing structure is characterized by comprising the air cylinder sleeve, wherein the air cylindersleeve is arranged between the air cylinder body and the air cylinder cover, a support boss is arranged on the inner wall of the air cylinder body, a support shoulder is arranged on the outer wall ofthe air cylinder sleeve, the support shoulder is abutted against the support boss, a boss and a compression bulge are arranged on the upper surface of the support shoulder, a groove is formed betweenthe boss and the compression bulge, the compression bulge and the air cylinder sleeve are in interference fit, and the upper surface of the periphery of the air cylinder body is flush with the edge of the upper surface of the compression bulge. The engine cylinder gasket sealing structure has the advantages that a cylinder gasket is of a structure simple to process and low in cost. The engine cylinder gasket sealing structure forms a whole circle of linear sealing structure, and not only is strong in sealing reliability, but also can effectively reduce sealing stress generated duet to compression. The engine cylinder gasket sealing structure solves problems of acting points of sealing force after the engine cylinder gasket sealing structure is assembled, and prevents that the deformationamount of the air cylinder sleeve is overlarge.

Description

technical field [0001] The invention relates to the technical field of engine structure design, in particular to an engine cylinder gasket sealing structure. Background technique [0002] With the upgrading of automobile emission regulations, the strengthening level of the engine is continuously improved, and the explosion pressure is also getting higher and higher. The cylinder mouth air sealing system between the engine cylinder block and the cylinder head includes the cylinder block, cylinder liner, cylinder gasket and cylinder head. . At present, in the automobile production process, air sealing ribs are usually arranged on the corresponding parts of the cylinder head on the cylinder head gasket, and the bottom surface of the cylinder head and the top surface of the cylinder liner are kept flat. When the cylinder head bolts are tightened, the air sealing ribs deform and generate pressure to seal the gas; or use For the flat cylinder gasket, a boss is designed between th...

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Problems solved by technology

Although it can effectively solve the leakage risk of the gas seal of the combustion chamber simply relying on the pressure wave of the cylinder port of the cylinder head gasket, the ring groove structure on the bottom plate of the cylinder head is difficult to process, and it is easy to generate fatigue load for the impact of high-temperature and high-pressure gas. Cracked cylinder head bottom plate is a great risk, and there is also a risk of cracking where the cylinder head gasket is subjected to extrusion and plastic deformation

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