Patent · US Active

Method for the production of a piston for an internal combustion engine

US8943687B2 · kind B2 · utility

7Cited by

7References

4Claims

0Family size

Assignee

Mahle International GmbH · DE

Inventors

Rainer Scharp · Leinfelden, DE
Gerhard Berr · Aspach, DE
Sascha-Oliver Boczek · Dielheim, DE
Reiner Mueller · Rottweil, DE

Key dates

Filing date	Apr 18, 2011
Grant date	Feb 3, 2015
Priority date	—
Expiry date	Oct 24, 2033

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T29/49265
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A method for the production of a piston made of steel, for an internal combustion engine, in which the upper piston part is produced using the forging method, and the lower piston part is produced using the forging or casting method, and they are subsequently welded to one another. To simplify the production method and make it cheaper, the upper piston part is forged using the method of hot forming and of cold calibration, to finish it to such an extent that further processing of the combustion bowl and of the upper cooling channel regions can be eliminated.

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