Internal-combustion engine piston ring, process for obtaining piston ring, and internal-combustion engine

A technology for piston rings and internal combustion engines, which is applied to piston rings, engine seals, mechanical equipment, etc., and can solve problems such as contact pressure deterioration and increased air pressure.

Inactive Publication Date: 2017-08-01
MAHLE INT GMBH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Combustion generates high temperatures and increases air pressure, which causes premature wear, which is further exacerbated by low levels of lubrication and contact pressure between the sliding surfaces of the compression rings and this specific area

Method used

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  • Internal-combustion engine piston ring, process for obtaining piston ring, and internal-combustion engine
  • Internal-combustion engine piston ring, process for obtaining piston ring, and internal-combustion engine
  • Internal-combustion engine piston ring, process for obtaining piston ring, and internal-combustion engine

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Embodiment Construction

[0029] The invention relates to a piston ring 1 and a method for depositing a coating capable of ensuring a variable thickness of the coating 5 on the outer surface 2 of the piston ring 1 such that at the ends of the gap 3 of the ring 1 In the area adjacent to the parts 31, 32 there is a coating 5 which is thicker than the coating in the opposite area near the ends 31, 32 of the ring 1, in addition, the ends 31, 32 of the gap 3 of the ring 1 are lowered. The thickness of the coating 5 in the vicinity thus provides a piston ring 1 with a high level of durability due to good resistance in the areas of greatest wear of the ring and a high level of thickness.

[0030] As is also known, the entire piston ring 1 is provided with a gap 3 , the presence of which ensures the possibility of mounting the ring in the groove of the piston of an internal combustion engine. For the purpose of better defining the present invention, the area of ​​the gap 3 of the ring is delimited by two ends ...

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Abstract

The present invention relates to a piston ring (1) and to a process for deposition of a coating capable of guaranteeing a variable thickness of the coating layer (5) on the external surface (2) of the piston ring (1) such that a region in the vicinity of the ends (31, 32) of a gap (3) of the ring (1) comprises a coating layer (5) that is thicker than the coating layer in the opposite region in the vicinity of the ends (31, 32) of the ring (1) and, furthermore, with a reduction in the thickness of the coating layer (5) of the ends (31, 32) of the gap (3) of the ring (1), a piston ring (1) with a high level of durability owing to the excellent strength and to the high level of thickness in the region of greatest wear of the ring, is provided.

Description

technical field [0001] The present invention relates to piston rings for internal combustion engines, wherein at least the outer surface of the piston ring is provided with a coating which provides good durability due to its high level of wear resistance combined with its low level of sliding wear. Background technique [0002] Internal combustion engines are basically formed of two main parts: an engine block (provided with one or more cylinders) and a crankshaft assembly connected to one or more cylinder heads. The crankshaft assembly includes the pistons, connecting rods, and crankshaft and is responsible for moving the pistons inside the cylinders in the engine block. Pistons are cylindrical components, usually composed of a metal base, and include one or more rings responsible for providing a sliding seal between the outer edge of the piston and the inner wall of the cylinder. [0003] During the movement of the piston inside the cylinder, the piston should adhere comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J9/14F16J9/26F16J15/12C23C14/04C23C14/22
CPCC23C14/044C23C14/22F16J9/14F16J9/26F16J15/12
Inventor 保罗·若泽·达·罗沙·莫尔登特达维·安东尼奥·达·席尔瓦努诺·科斯塔
Owner MAHLE INT GMBH
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