Patent · US Active

Piston for an internal combustion engine and method for its production

US8671905B2 · kind B2 · utility

3Cited by

7References

10Claims

0Family size

Assignee

Mahle International GmbH · DE

Inventors

Rainer Scharp · Leinfelden, DE
Peter Kemnitz · Leutenbach, DE
Michael Ullrich · Heubach, DE

Key dates

Filing date	Sep 6, 2011
Grant date	Mar 18, 2014
Priority date	—
Expiry date	Jan 16, 2032

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T29/49254
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A piston for an internal combustion engine has a piston head that has a circumferential cooling channel as well as a combustion bowl having a circumferential bowl wall that makes a transition into a piston crown by way of a bowl edge region. The combustion bowl is formed at least in part by a piston base body and the bowl wall is formed at least in part from an insert. The insert is connected with the piston base body by means of beam welding. A lower weld seam is configured in the bowl wall, which seam encloses an acute angle with the piston center axis (M) and ends in the lower half of the cooling channel. An upper weld seam runs from the cooling channel ceiling to the piston crown and is disposed centered or radially offset toward the outside, with reference to the clear width of the cooling channel.

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