Patent · US Expired

Single-part cooling channel piston for a combustion engine

US6698392B1 · kind B1 · utility

11Cited by

4References

7Claims

0Family size

Assignee

Mahle GmbH · DE

Inventors

Hans-Jurgen Kohnert · Winnenden, DE
Peter Kemnitz · Leutenbach, DE

Key dates

Filing date	Oct 11, 2002
Grant date	Mar 2, 2004
Priority date	—
Expiry date	Oct 11, 2022

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF05C2201/0448
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A single-part cooling channel piston for a combustion engine with a piston head of forged steel comprises a combustion bowl in the piston crown, a ring wall with ring belt and an all-round closed cooling channel level with the ring belt. The piston skirt is connected to the pin bosses attached to the piston head. Inexpensive manufacture together with improved cooling and good form stability of the piston is achieved by providing the cooling channel with holes spread over its circumference towards the piston crown and spaced such that the piston material present between such holes forms supporting ribs for the piston crown.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.