A kind of engine cylinder bore and processing method thereof
A technology of engine cylinders and processing methods, which is applied in the direction of engine components, machines/engines, metal processing equipment, etc., can solve problems such as wear, low processing efficiency, and poor emission performance, so as to improve production efficiency, reduce fuel consumption, and reduce engine oil The effect of evaporation
Inactive Publication Date: 2017-12-05
JIANGSU UNIV
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Problems solved by technology
[0006] The purpose of the present invention is to solve the deficiencies in the prior art, and provide a kind of engine cylinder bore and its processing method, solve the problem of low processing efficiency, easy to appear due to the surface support rate Problems of wear and poor emission performance due to drop
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[0041] The present invention will be described in further detail below in conjunction with the specific embodiments of the accompanying drawings, but the protection scope of the present invention is not limited thereto.
[0042] figure 1 Shown is a schematic diagram of a cylinder bore 1 in an embodiment of the present invention, a cylinder bore of an engine, the surface of the cylinder bore 1 is distributed with an array of cavities 10, the size of the array of cavities 10 is on the micron scale, and the surface of the cylinder bore 1 is The area roughness Ra value of the non-cavity 10 is less than or equal to 0.2 μm. The surface of the cylinder hole 1 of the present invention is smoother, so that the oil scraping effect of the oil ring in the piston ring is improved during the operation of the engine, and at the same time, the increase of the oil consumption of the whole machine caused by the evaporation of the oil on the surface of the cylinder hole 1 is reduced.
[0043] ...
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Abstract
The invention provides an engine cylinder hole and a processing method thereof. The surface of the cylinder hole is distributed with an array of cavities; the size of the cavities is on the micron scale; shift angle α∈[30,90]°, the distribution density of the concave cavity (10) ρ∈[5,20]%; the concave cavity has Different spacing, that is, keep the circumferential spacing M constant, increase the axial N spacing, perform high-density micro-cavity morphology processing in the high-speed area, and perform low-density micro-cavity morphology processing in the low-speed area; by changing The density of the concave cavities reduces the number of the concave cavities, obtains the mirror cylinder bore through mechanical honing, and then processes the surface of the cylinder bore with a laser to obtain a circular concave cavity array with a special uniform distribution law and a size of micron. ; During the relative movement of the cylinder bore-piston ring, the concave cavity forms a continuous lubricating oil film with the least lubricating oil loss, and exerts the fretting pressure lubrication effect.
Description
technical field [0001] The invention belongs to the field of internal combustion engines, and in particular relates to an engine cylinder hole and a processing method thereof. Background technique [0002] The cylinder bore-piston ring friction pair is one of the typical friction pairs in the engine, which determines the service performance and life of the engine, and the texture structure of the cylinder bore surface is closely related to the engine emission performance. In the past, the mechanical honing process was generally used in the machining of engine cylinder bores. By reducing the roughness of cylinder bores and forming cross-platform textures, the lubrication conditions between cylinder bores and piston ring friction pairs were improved. In recent years, with the advancement of special processing, especially high-energy laser processing technology, cylinder bore laser texturing technology has emerged. It has the advantages of energy saving and emission reduction,...
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IPC IPC(8): F02F1/00B23K26/36
Inventor 康正阳符永宏纪敬虎王林森华希俊王浩
Owner JIANGSU UNIV