Piston ring for internal combustion engines

US9598763B2 · kind B2 · utility

Assignee

• Federal-Mogul Burscheid GmbH · DE

Inventors

• Manfred Fischer · Leichlingen, DE
• Ralf Lammers · Wermelskirchen, DE
• Christiane Bauer · Burscheid, DE
• Steffen Hoppe · Overath, DE

Key dates

• Filing date: Oct 1, 2007
• Grant date: Mar 21, 2017
• Expiry date: Jul 30, 2030

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16J9/26
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

The invention relates to a piston ring which is produced from a carrier material, especially steel or a cast material. The piston ring has a wear-resistant coating from a periodic multilayer system, every periodicity consisting of at least two individual metal nitride layers. Adjacent individual layers within the periodicity have different metallic elements. The thickness of an individual layer is ≧15 nm.