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Piston ring and internal combustion engine

A technology for piston rings and internal combustion engines, which is applied in the field of internal combustion engine components and piston rings of internal combustion engines, and can solve problems such as cylinder liner piston wear, ring wear, oil leakage, etc.

Inactive Publication Date: 2017-08-29
MAHLE METAL LEVE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under greater compression, combustion pressure, temperature and rotation, the rings also exert greater pressure on the piston and the walls of the piston, also causing greater wear or fatigue of the rings, which increases the clearance that exists between the rings and the cylinder , in this way, causing problems of wear of the cylinder liners and / or the piston itself, oil leakage, increased fuel and / or oil consumption, and even ring rupture

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] The invention should now be described in particular embodiments thereof. While specific embodiments are described in detail, it should be understood that they should be considered as illustrations of the principles thereof and are not intended to limit the invention to what is solely described in this memo. It should be appreciated that the different teachings of the embodiments discussed below can be employed alone or in any combination suitable to produce the same technical effect.

[0024] As mentioned above, the demands placed on internal combustion engines in terms of mechanical stress are increasing day by day, with the result that their components are subjected to greater operating stress. Piston rings are a necessary component to ensure proper functioning of the engine in terms of performance as well as in terms of fuel consumption and controlled gas release.

[0025] Piston rings are generally known to be realized as materials exhibiting high wear resistance p...

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Abstract

The invention relates, in a general manner, to a component of an internal combustion engine and, more specifically, the invention is related to a piston ring of an internal combustion engine. The invention furthermore relates to an internal combustion engine containing such ring. According to an embodiment of the invention, the piston ring comprises between 8 and 15% by weight of chromium, in addition to other elements and inevitable impurities, having a hardness comprised between 350 and 420 HV, wherein the said ring comprises a superficial nitrided layer having a depth less than or equal to 60 [mu]m and having an average hardness measured upon the surface exceeding 800 HV, wherein the nitride particles of the nitrided layer possess a maximum size of 5 [mu]m and are distributed over between 4 and 8% of the area of the nitrided layer, the white layer being absent in the nitrided layer.

Description

technical field [0001] The present invention relates to components of internal combustion engines in the usual manner, and more particularly the invention relates to piston rings of internal combustion engines. Furthermore, the invention relates to an internal combustion engine comprising such a ring. Background technique [0002] Internal combustion engines, such as those employing the well-known Otto or Diesel cycles, are widely and commonly utilized in vehicles for moving people and goods, such as passenger, transport and freight vehicles, including trucks and locomotives. In general, such engines utilize fuels with a high hydrocarbon content, such as fossil fuels, and / or fuels derived from renewable energy sources, in order to convert thermal energy from the combustion of the fuel into kinetic energy. [0003] Internal combustion engines are well known in construction and basically consist of a piston moving inside a cylinder associated with a crankshaft. On the upper ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C8/06C23C28/04F16J9/26
CPCC23C8/06C23C14/0641C23C28/044F16J9/26C23C8/26C23C8/80C23C28/00
Inventor 吉塞拉·阿布拉斯·马克思
Owner MAHLE METAL LEVE