Coolable trunk piston for internal combustion engines

US5052280A · kind A · utility

Assignee

• Mahle GmbH · DE

Inventors

• Eberhard Kopf · Heidenheim, DE
• Joachim Wille · Stuttgart, DE

Key dates

• Filing date: Nov 5, 1990
• Grant date: Oct 1, 1991
• Expiry date: Nov 5, 2010

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02F2003/0061
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

In a two-piece piston with a head piece and a trunk hinged only over the piston pin, the annular space radially located inside the piston ring groove and open in the direction of the trunk is covered with a sheet metal wall part forming a cooling duct. The sheet metal wall part is held by a collar that extends from the outer annular wall of the head piece and is cramped around the sheet metal wall part. For optimally covering the annular space, the sheet metal wall part is radially divided into two parts.