Cylinder sleeve with inner circle axial transition layers

Abstract

The invention discloses a cylinder sleeve with inner circle axial transition layers. The cylinder sleeve comprises a cylinder sleeve base body, an inner circle combustion layer is arranged on the inner side of the cylinder sleeve base body, the cylinder sleeve further comprises an inner circle combustion section, an inner circle piston section and a piston outer section which are arranged in the axial direction of the inner circle combustion layer. a first transition layer is arranged between the inner circle combustion section and the inner circle piston section, a second transition layer isarranged between the inner circle piston section and the piston outer section, the range of the distance between the first transition layer and the second transition layer is 3-10 mm, and the inner circle combustion layer is provided with an iron-based coating with the thickness of 0.6-22 mm. The cylinder sleeve has the advantages that the iron-based coatings made of materials with different hardness are adopted according to different abrasion degrees of areas of an engine cylinder, meanwhile, the first transition layer and the second transition layer are additionally arranged, so that the cost is lowered, in addition, the abrasion of all the areas of an cylinder is consistent, the air tightness of the cylinder is effectively guaranteed, the engine power is improved, and the oil consumption is reduced.

Description

technical field [0001] The invention relates to the technical field of engine cylinder liners, in particular to a cylinder liner with an inner circular axial transition layer. Background technique [0002] Cylinder liner is a widely used part in automobile engine. Its functions mainly include sealing, heat conduction, and working surface of piston ring. It is one of the core components of the engine. With the increase of national policies on automobile emission requirements, reducing fuel consumption and engine oil consumption has become a key issue for OEMs. The inner circle of the cylinder liner is used as the working surface of the piston ring and needs to have high wear resistance. [0003] The disadvantage of the existing technology is that the traditional design scheme is to choose a material with good wear resistance and high cost for the production and manufacture of the cylinder liner, which not only causes waste of cost, but also causes inconsistent wear and tear ...

AI Technical Summary

Problems solved by technology

[0003] The disadvantage of the existing technology is that the traditional design scheme is to choose a material with good wear resistance and high cost for the production and manufacture of the cylinder liner, which not only causes waste of cost, but also causes inconsistent wear and tear in different areas of the cylinder. Cylinder tightness is poor

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