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1. (WO2018220192) PISTON RING AND METHOD OF MANUFACTURE

Pub. No.:    WO/2018/220192    International Application No.:    PCT/EP2018/064500
Publication Date: Fri Dec 07 00:59:59 CET 2018 International Filing Date: Sat Jun 02 01:59:59 CEST 2018
IPC: F16J 9/26
Applicants: MAHLE INTERNATIONAL GMBH
Inventors: MENDES DE ARAUJO, Fabio
LIMA SARABANDA, José Valentim
Title: PISTON RING AND METHOD OF MANUFACTURE
Abstract:
A piston ring and a method of manufacturing a piston ring for a piston of a reciprocating internal combustion engine. The piston ring comprises a body having an outer circumferential surface. A tribological coating is formed on the outer circumferential surface of the body. The tribological coating has a dual layer structure and includes a relatively hard base layer and a relatively porous top layer overlying the base layer.