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Application of engine closed-loop port gap technology

An engine and gap technology, applied in the direction of engine components, machines/engines, engine sealing devices, etc., to achieve the effects of small ring groove width, good guidance, and reduced impact torque

Inactive Publication Date: 2011-05-04
韦加伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the gap is too small, there will be various quality problems such as cylinder scuffing.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0007] The cylinder liner is strictly inspected, and the dimensional tolerance is divided into four grades of A, B, C, and D in the X and Y directions, so that the piston can maintain the best state when it moves at high temperature in the cylinder liner.

[0008] The pistons have also been strictly inspected, and the dimensional tolerances are divided into four grades A, B, C, and D in the X and Y directions, and they are matched with the cylinder liner.

[0009] The mass error of each group of pistons does not exceed 1.5 grams.

[0010] piston. A small gap should be formed between the piston ring and the cylinder wall to form a lubricating oil film. The hardness of the lubricating oil film is very soft, and it forms a kind of soft and hard friction with the cylinder liner with very high hardness. The friction is very small and the wear is also small. Correspondingly very small.

[0011] Due to the use of the sheet-shaped closed piston ring, the excessive side clearance of ...

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PUM

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Abstract

The invention relates to application of an engine closed-loop port gap technology, which realizes the reduction of a piston closed-loop port gap and the minimization of the fit clearance of a piston and a cylinder sleeve, thereby promoting the comprehensive performance index of an engine. In the invention, the cylinder sleeve and the piston are both strictly detected, size tolerance has four grades of grade A, grade B, grade C and grade D, the cylinder sleeve and the piston are assembled pairwise, and a closed piston ring is arranged.

Description

technical field [0001] The invention relates to the application of the ring gap technology, in particular to the application of the engine closed ring gap technology. Background technique [0002] The cylinder liner, piston, piston ring, and piston pin of the engine, the friction pair of the piston group (also known as the four matching parts), are key parts of the engine and play a vital role in engine performance. [0003] In the case that the piston does not pull the cylinder and seize it, the smaller the fit gap between the piston and the cylinder liner, the smaller the better, and the smaller the gap between the piston ring and the piston groove, the better. In this way, if the sealing performance of the combustion chamber composed of piston, cylinder liner, piston ring and cylinder head is good, the various indicators of the engine will be better. However, if the gap is too small, various quality problems such as cylinder scuffing will appear. Contents of the invent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02F11/00F02F5/00
Inventor 韦加伟
Owner 韦加伟