Patent · US Active

Piston for an internal combustion engine

US8550052B2 · kind B2 · utility

1Cited by

4References

2Claims

0Family size

Assignee

Mahle International GmbH · DE

Inventors

Klaus Keller · Lorch, DE
Michael Ullrich · Heubach, DE
Rainer Scharp · Leinfelden, DE

Key dates

Filing date	Aug 9, 2011
Grant date	Oct 8, 2013
Priority date	—
Expiry date	Dec 21, 2031

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02F3/003
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A piston for an internal combustion engine has an upper part and a lower part. The upper part has a collar with a ring rib and the lower part has a wall and a contact part radially within the wall. When the upper part is connected with the lower part by friction welding, the face surfaces of the ring rib, the collar, the wall, and the contact part form friction-welding surfaces and form a cooling channel and a cooling cavity between them. To supply the cooling channel and the cooling cavity with cooling oil, radial bores are introduced into the ring rib, which bores connect the cooling channel with the cooling cavity. In this way, it is guaranteed that a sufficient residual amount of oil collects in the cooling channel and in the cooling cavity, which amount is constantly renewed, and leads to good cooling of the piston crown.

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