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Piston ring

A technology of piston rings, outer layers, applied in the field of rings provided with a metal base

Inactive Publication Date: 2017-07-11
MAHLE METAL LEVE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] While the theory appears to have a sound technical basis, it is known that this approach does not solve the problem of high wear at the ring ends

Method used

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Embodiment Construction

[0025] The present invention proposes a piston ring 10 for an internal combustion engine, more particularly a compression ring for a heavy duty diesel engine.

[0026] As is known, the demands on such engines are rather high, which causes premature failure of their compression rings due to the high wear in the end area of ​​the skins. The present invention proposes a novel compression ring 10 capable of resisting wear in the end region 4 without exposing the base material of the ring, thus maintaining a high formability at reduced cost.

[0027] To this end, the ring 10 of the invention utilizes a metal base (steel, cast iron or aluminium), the base material being provided with a chemical composition specially designed for applying an intermediate layer 2, which is a layer of wear-resistant material, preferably nitrogen Chromide, but not limited to this material, the intermediate layer is applied by thermal spraying process, preferably by high velocity spraying, comprising oxy...

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Abstract

The invention relates to a piston ring (10) for use on an internal combustion engine, in particular, the ring (10) has a metal base (1), wherein the outer part of its ends receives two layers applied subsequently to provide a larger wear resistance; the middle layer (2), which preferably includes chromium nitride (CrN) applied by supersonic thermal spray (HVOF); and the outer layer (3), which includes chromium nitride (CrN) applied by physical vapor deposition (PVD). Chromium (CrN).

Description

technical field [0001] The present invention relates to a piston ring for use on an internal combustion engine, and more particularly to a ring provided with a metal base, wherein the outer part of its ends receives two layers subsequently applied to provide greater wear resistance. Background technique [0002] In general, every internal combustion engine, whether it operates in a Diesel or Otto cycle in 2-stroke or 4-stroke, comprises at least one piston with its corresponding ring. [0003] The piston ring is the part that performs the function of sealing the space between the engine sleeve and the piston, isolating other internal engine components from the combustion chamber. This element, arranged radially on top of the piston, prevents combustion gases from escaping the combustion chamber towards the crankcase and engine oil from penetrating the combustion chamber in the reverse direction. There is more than one piston ring around a single piston, it is common to use ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16J9/14F16J9/26
CPCF16J9/14C23C14/0641F16J9/203F16J9/26
Inventor 保罗·若泽·达·罗沙·莫尔登特保罗·罗伯特·维埃拉·德·莫赖斯若泽·瓦伦廷·利马·萨拉班多
Owner MAHLE METAL LEVE