Plateau honing cross hatch cylinder sleeve used for engine

Abstract

The invention provides a plateau honing cross hatch cylinder sleeve used for an engine. The plateau honing cross hatch cylinder sleeve used for the engine is resistant to abrasion, good in lubricating effect and low in comprehensive stress of air inlet-outlet areas. A cylinder sleeve body is made by casting austempering ductile iron or chromium molybdenum copper cast iron in an integrated mode. The inner wall of the cylinder sleeve body is provided with plateau honing cross hatches, and the middle of the inner wall is in a waist drum shape. The waist-drum-shaped area of the cylinder sleeve body is provided with a plurality of air inlet-outlets. According to the plateau honing cross hatch cylinder sleeve used for the engine, receding measures are taken for avoiding the situation that a piston ring comes into intersection conflict with the nearby areas of the air inlet-outlets during reciprocating motion, specifically, the inner wall of the cylinder sleeve body is provided with the plateau honing cross hatches, and the middle of the inner wall is in the waist drum shape; meanwhile, the plateau honing cross hatches of the waist-drum-shaped part is in a gradually changed form along with waist-drum-shaped shape lines to achieve normal matching of the cylinder sleeve body and the piston ring, then sealing of a combustion chamber is ensured to be good, and even operating of a diesel engine is ensured, so that the serviceability of the cylinder sleeve is further improved, and the service life of the cylinder sleeve is prolonged.

Description

technical field [0001] The invention relates to a cylinder liner of an engine, in particular to a cylinder liner with a platform pattern. Background technique [0002] In the prior art, engine cylinder liners are made of boron cast iron, boron-copper cast iron, chrome-molybdenum copper cast iron, high-phosphorus alloy cast iron, high-phosphorus cast iron, high-content chromium-molybdenum-nickel cast iron, chromium-molybdenum-copper-boron alloy cast iron, and the inner surface of the cylinder liner is hardened The treatment adopts heat treatment processes such as nitrocarburization, laser, surface high-frequency quenching, chrome plating, etc., or the inner surface of the body (hardness HB207-360) is equipped with a platform honing mesh or nitrocarburizing (the compound layer is only 0.030mm) and a platform honing mesh When the surface hardening layer is worn away, the inner wall of the cylinder liner with a non-round matrix structure hardness of HB207-360 will not be able to...

AI Technical Summary

Problems solved by technology

In order to avoid cross conflict between the piston ring and the area near the intake and exhaust ports during reciprocating motion, avoidance and cooling measures need to be taken, otherwise the normal matching between the cylinder liner and the piston ring will be destroyed, which will cause the failure of the combustion chamber seal and even damage the diesel engine. run

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