Patent · US Expired

Cooling duct piston for a direct-injection diesel engine

US6892689B2 · kind B2 · utility

17Cited by

8References

6Claims

0Family size

Assignee

Mahle GmbH · DE

Inventors

Ulrich Bischofberger · Eßlingen, DE
Joachim Schulz · Stuttgart, DE

Key dates

Filing date	Jun 16, 2001
Grant date	May 17, 2005
Priority date	—
Expiry date	Jul 21, 2021

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/12
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

In a cooling channel piston for a diesel engine with direct injection, a reduction in the compression height is achieved while keeping the output the same or increasing it. The piston consists of at least two parts soldered to one another, one of which is a piston base body forged from steel, having a shaft, hubs, and a ring part, and second part of which, consisting of steel or a nickel-based material, comprises a combustion trough and at least a part of the piston head. The piston base body and the second part together from a cooling channel that can be filled with oil.

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