Sealing structure of valve chamber cover

Abstract

The invention discloses a sealing structure of a valve chamber cover. The sealing structure can seal the valve chamber cover with the arc-shaped combined face and a connection part. The sealing structure comprises the valve chamber cover and a cylinder cover, a cam shaft bearing cover located in a cavity formed by the valve chamber cover and the cylinder cover protrudes out of the cavity, sealing rubber pads are arranged on the combined face of the valve chamber cover, the cylinder cover and the cam shaft bearing cover, and depths of sealing grooves, used for containing the sealing rubber pads, in the valve chamber cover are different. According to the structure that the axle bearing cover protrudes out of the cavity formed by the valve chamber cover and the cylinder cover, the combined face of the valve chamber cover and the cam shaft bearing cover is not a plane, and the sealing grooves in the combined faces of the valve chamber cover and the cam shaft bearing cover are designed into different depths, so that pressing forces of the sealing rubber pads are basically the same, and accordingly a good sealing effect is achieved.

Description

technical field [0001] The invention relates to the field of automobile engines, in particular to a sealing structure of a valve chamber cover. Background technique [0002] The upper end surface of the cylinder head of the automobile engine is equipped with a gas distribution mechanism, a spark plug, etc. These mechanisms form a closed space by the valve chamber cover and the engine cylinder head, which requires the structure and structure of the valve chamber cover sealing groove and gasket The shape fits well to provide a good seal between the valve cover and cylinder head. [0003] At present, rubber gaskets are mostly used for sealing between the valve chamber cover and the cylinder head of gasoline engines. Connect the valve chamber cover with the cylinder head to form a closed space. For the flat sealing structure, the sealing effect is ideal, and there is little leakage. However, due to the structure and layout of some engines, the valve chamber cover cannot comple...

AI Technical Summary

Problems solved by technology

However, due to the structure and layout of some engines, the valve chamber cover cannot completely include the entire alignment mechanism and the camshaft bearing cover, that is, the sealing surface is not flat, and the valve chamber cover and the camshaft bearing cover together It forms a sealed space with the cylinder head, and the tightening force distribution of the rubber gasket opposite to the bolt on the valve chamber cover is uneven, and the rubber gasket is subjected to different compression forces.

For this structure, if the seal between the valve cover and the rubber gasket and the camshaft bearing cover is poor, after the engine has been running for a period of time, there will often be partial oil leakage from the valve cover.

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