Piston pin with slide layer for connecting rod eye for internal combustion engines

US8020529B2 · kind B2 · utility

Assignee

• Daimler AG · DE

Inventors

• Dirk Becker · Bad Hersfeld, DE
• Marcus Brand · Dormagen, DE
• Patrick Izquierdo · Ulm, DE
• Wolfgang Pellkofer · Ulm, DE
• Christian Russer · Ulm, DE

Key dates

• Filing date: Feb 27, 2007
• Grant date: Sep 20, 2011
• Expiry date: Jun 29, 2029

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/49266
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

Piston pin for a connecting rod in a reciprocating internal combustion engine, wherein the piston pin carries at least in the area of the running surface a thermal sprayed slide layer of a metallic bearing material or slide bearing material, as well as reciprocating internal combustion engine with a connecting rod with small and with large connecting rod eye, wherein at least the running surface of one of the piston pins is formed of a thermal sprayed slide layer of a metallic bearing material, which exhibits a lower hardness than the running surface of the corresponding connecting rod eye and process for manufacturing a described piston pin with the steps of a extrusion molding or machining a piston pin preform, introduction of a recess in the area which will later become the running surface, roughening the outer surface in the area of the recess, application of a coating of a bearing material by a thermal spray process.