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Piston ring and method for manufacturing piston ring

A technology in piston rings and pistons, applied in the field of manufacturing the piston rings, can solve problems such as thermal coatings that are not clearly discussed

Inactive Publication Date: 2018-02-23
MAHLE METAL LEVE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] As will be seen, among the very representative documents of the field statement for piston rings for internal combustion engines, all of the documents stated above are based on an earlier paradigm in which part of the material was modified such that the thermal expansion values ​​fell into desired parameters, and none of them clearly discusses the use of thermal coatings to a greater or lesser extent as a thermal barrier

Method used

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  • Piston ring and method for manufacturing piston ring
  • Piston ring and method for manufacturing piston ring
  • Piston ring and method for manufacturing piston ring

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Embodiment Construction

[0038] Those skilled in the art know that when an internal combustion engine equipped with piston rings is in operation, thermal expansion of the piston rings is unavoidable, which changes the value of the radial pressure applied to its free ends to a greater or lesser extent .

[0039]If a given maximum value (given design parameters) is reached or exceeded, an excessive increase in the value of this radial pressure can prematurely wear the coating at the free end of the ring, thereby reducing its value with respect to compression and / or maintaining the oil film at The efficiency of that part of the cylinder wall.

[0040] This occurs because the piston rings operate as a bridge for the transfer of heat between the piston and the cylinder liner, the heat is lost from the piston rings through the fins or by transfer through the water present in the channels, with the result that heat (and thus temperature ) is greatest in the inner part of the circle, causing the inner part t...

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PUM

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Abstract

The invention relates to a piston ring for use in a piston of an internal combustion engine or compressor, said piston ring having a substantially annular shape defining an inner surface (2) facing a groove, facing a combustion chamber and an upper surface (3) substantially at right angles to the inner surface (2) and a lower surface (4) substantially opposite to the second surface (3), and the heat insulating coating (P) is provided at least on the inner surface, the upper surface or the lower surface Part of (2, 3, 4).

Description

technical field [0001] The present invention relates to a piston ring, especially intended for use in internal combustion engines or compressors, provided with a thermal barrier applied to at least a part of the surface area of ​​the ring, thereby reducing the temperature of the ring and inferring at the ends (tips) of the part less wear and tear. [0002] The invention also relates to a method for producing the piston ring. Background technique [0003] The piston ring acts as a bridge for transferring heat between the piston and the cylinder liner, from which heat is lost through the fins or transferred to the water present in the cooling channels. [0004] The heat from the explosion of the air-fuel mixture causes the piston rings to expand. Since the ring acts as a "bridge" to conduct heat between the piston and the block, the heat (and thus temperature) is greatest in the inner part of the ring, causing it to expand more than the outer part. The greater this expansio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16J9/26F16J9/14
CPCF16J9/14F16J9/26C23C30/005F16J9/12F16J9/28
Inventor 安东尼奥·爱德华多·梅雷莱斯·托马尼克丹尼尔·洛佩斯
Owner MAHLE METAL LEVE