Diesel engine cylinder block camshaft cavity

Abstract

The invention discloses a camshaft mold cavity for a diesel engine air cylinder body. The camshaft mold cavity for the diesel engine air cylinder body is located on the side face of a diesel engine air cylinder body hole. On the cross section, penetrating through the center of a camshaft, of one of the air cylinders of the diesel engine air cylinder body, the inner outline, close to one side of a air cylinder hole of the air cylinder, of the diesel engine air cylinder body camshaft mold cavity is a square surface; on the longitudinal section, penetrating through the center of the camshaft, of the air cylinder, the inner outline and the inner wall of the air cylinder hole of the air cylinder close to the inner outline are designed to be arc surfaces in a profile-followed mode. According to the camshaft mold cavity for the diesel engine air cylinder body, the inner outline, close to one side of the air cylinder hole, of the mold cavity and the inner wall of the air cylinder hole close to the inner outline are designed in a profile-followed mode, so that the wall thickness between the air cylinder hole and the camshaft mold cavity is even, and local wall thickness can be reduced; the weight of the air cylinder body is reduced effectively, the weight of the whole engine is further reduced, and the light weight requirement of the engine is further met.

Description

technical field [0001] The invention relates to the field of diesel engine cylinder blocks, in particular to a camshaft cavity of a diesel engine cylinder block. Background technique [0002] At present, for a diesel engine with a side camshaft, the cross-sectional structure of one of the cylinder blocks passing through the center of the camshaft is as follows: figure 1 shown; figure 2 for figure 1 The schematic diagram of the cross-sectional structure along the A-A direction of , showing the longitudinal cross-sectional structure of one of the cylinder blocks passing through the center of the camshaft. [0003] Among them, such as figure 1 As shown, on the cross-section of one of the cylinder blocks passing through the center of the camshaft, the inner contour 13 of the camshaft cavity 11 near the cylinder hole 12 is a cylindrical surface with equal radius, and as figure 2 As shown, in the longitudinal section of one cylinder of the cylinder block passing through the ...

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Problems solved by technology

[0003] Among them, such as figure 1 As shown, on the cross-section of one of the cylinder blocks passing through the center of the camshaft, the inner contour 13 of the camshaft cavity 11 near the cylinder hole 12 is a cylindrical surface with equal radius, and as figure 2 As shown, in the longitudinal section of one cylinder of the cylinder block passing through the center of the camshaft, the inner contour 13 is a square surface, and does not conform to the inner wall of the cylinder hole close to it, so that the gap between the cylinder hole and the camshaft cavity is The wall thickness is uneven, and the local wall thickness is too large (such as figure 2 The wall thickness section between the cylinder bore and the camshaft cavity that is offset from the center of the cylinder bore is shown), resulting in a relatively heavy engine

[0004] Today, when automobile factories require the engine to be lightweight, the existing engine camshaft cavity structure that makes the engine appear cumbersome can no longer meet the lightweight requirements of the engine.

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