Light alloy piston

US4648309A · kind A · utility

Assignee

• Kolbenschmidt Aktiengesellschaft · DE

Inventor

• Klaus Schellmann · Weinsberg, DE

Key dates

• Filing date: May 13, 1985
• Grant date: Mar 10, 1987
• Expiry date: May 13, 2005

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02F3/022
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

In a light alloy piston having a convex and oval external shape, the piston skirt has in the cold state a larger running clearance at its top end than at its bottom end. In order to reduce the friction loss of such piston, the piston skirt has a larger ovalness adjacent to the horizontal plane extending through the pin axis than in the remaining regions of the piston skirt.