Piston with a profiled ring groove

US5303683A · kind A · utility

Assignee

• Mahle GmbH · DE

Inventors

• Ulrich Wittwer · Deißlingen, DE
• Manfred Ziegler · Neutraubling, DE

Key dates

• Filing date: Feb 10, 1993
• Grant date: Apr 19, 1994
• Expiry date: Feb 10, 2013

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F05C2201/021
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A piston with at least one compression ring, a top end and a longitudinally extending axis for an internal combustion engine. The piston includes at least one compression ring groove defined by first and second spaced lateral surfaces for receiving the at least one compression ring. The first lateral surface is located nearest the top end of the piston. At least one of the first and second surfaces includes a plurality of profiles extending circularly around the axis and having a depth in the range of 0.003 mm to 0.015 mm and a width in the range of 0.02 mm to 0.2 mm.