Patent · US Expired

Cooled piston for internal combustion engines

US6647861B1 · kind B1 · utility

8Cited by

4References

8Claims

0Family size

Assignee

Mahle GmbH · DE

Inventors

Detlef Jacobi · Esslingen am Neckar, DE
Rolf Wellandt · Meßstetten, DE

Key dates

Filing date	Dec 10, 2001
Grant date	Nov 18, 2003
Priority date	—
Expiry date	Dec 10, 2021

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02F3/22
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

The invention relates to a cooled piston for internal combustion engines. The inventive piston is provided with an annular cooling channel on the periphery of the piston head. Said cooling channel, at its end that is open towards the piston shaft, is closed by a correspondingly shaped wall part that is radially split at least once. The aim of the invention is to improve the supply of cooling oil in the cooling channel. To this end, the wall part at the end allocated to the split is provided with a respective recess and with an upturned S-bend section that serves to deflect the cooling oil jet.

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