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US 2017/0254418 A1Published application
Piston Ring
AssigneeMahle International GmbH
InventorsThomas Stong, Thomas Smith
Life of this patent
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Abstract
A piston ring for a piston of a reciprocating internal combustion engine. The piston ring comprises a body having an outer contact surface. A tribological coating is formed on the outer contact surface of the body. The tribological coating comprises a quaternary Cr—V—Ti—N system. In one form, the tribological coating is deposited on the outer contact surface of the body as a stack of multiple layers.
Claims20
A piston ring comprising:
- a body having an outer contact surface;
- and
- a tribological coating overlying the outer contact surface of the body, wherein the tribological coating comprises a quaternary Cr—V—Ti—N system.
A piston ring comprising:
- a split annular body having an upper surface, a lower surface, an inner circumferential surface, and an outer circumferential surface extending between the upper and lower surfaces;
- and
- a tribological coating overlying the outer circumferential surface of the annular body, wherein the tribological coating comprises a quaternary Cr—V—Ti—N system and is formed on the outer circumferential surface of the annular body as a stack of multiple layers.
Dependencies are inferred from the claim text.