High-strength diesel engine cylinder cover

Abstract

The invention provides a high-strength diesel engine cylinder cover which comprises a cylinder cover body, an upper water cavity and a lower water cavity, wherein the upper water cavity and the lower water cavity are formed in the cylinder cover body and are arranged around the periphery of an oil sprayer mounting hole; a bulge region, adjacent to the oil atomizer mounting hole, at the top of the lower water cavity is of an arc-shaped structure which is extended into the lower water cavity; the longitudinal distance between the end, which is away from the oil sprayer mounting hole, of the bulge region and the bottom surface of the lower water cavity is greater than that between the end, which is adjacent to the oil sprayer mounting hole, of the bulge region and the bottom surface; the transverse distance between the end, which is adjacent to the oil sprayer mounting hole, of the bulge region and the end, which is away from the oil sprayer mounting hole, of the bulge region is greater than that between the end, which is adjacent to the oil sprayer mounting hole, of the bulge region and a nose bridge region; the depth of a groove formed in the nose bridge region on the bottom surface is smaller than the longitudinal distance between the end, which is adjacent to the oil sprayer mounting hole, of the bulge region and the end, which is away from the oil sprayer mounting hole, of the bulge region. By virtue of the design, the working temperature and temperature gradient of the cylinder cover can be effectively reduced, thermal expansion constraints of the nose bridge region are released, the integral rigidity of the cylinder cover is improved, and thus the heat-resistant and mechanical fatigue resistant performances of the cylinder cover are comprehensively improved.

Description

technical field [0001] The invention relates to a cylinder head structure, in particular to a high-strength diesel engine cylinder head with a local reverse arch structure in the nose bridge area, which is particularly suitable for reducing the working temperature and temperature gradient of the thermally critical area of ​​the cylinder head and improving the mechanical strength of the cylinder head with heat intensity. Background technique [0002] In order to meet the power, economy and emission requirements of diesel engines, the power density and explosion pressure of diesel engines continue to increase, and the mechanical load and thermal load on the cylinder head also increase accordingly, and the fatigue failure of the cylinder head becomes more and more prominent. . How to comprehensively improve the mechanical fatigue resistance and thermal fatigue resistance of the cylinder head has become the main point of the current diesel engine cylinder head design. [0003]...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problems existing in the prior art that the precise cooling of the cylinder head bottom plate area cannot be realized, and the thermal expansion constraints at the nose bridge area of ​​the cylinder head bottom plate cannot be effectively released, and provide a method that can realize precise cooling of the cylinder head bottom plate area, A high-strength diesel engine cylinder head that can effectively release the thermal expansion constraints at the nose bridge area of ​​the cylinder head bottom plate

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