Patent · US Expired

Liquid-cooled piston for internal combustion engines

US5845611A · kind A · utility

14Cited by

4References

7Claims

0Family size

Assignee

Daimler-Benz AG · DE

Inventors

Erwin Schmidt · Baltmannsweiler, DE
Siegfried Sumser · Stuttgart, DE
Edgar Martin · Escondido, US

Key dates

Filing date	May 8, 1997
Grant date	Dec 8, 1998
Priority date	—
Expiry date	May 8, 2017

Classification

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

Abstract

In a liquid cooled piston for internal combustion engines having a cooling oil supply and at least one liquid passage which is formed in a top part of the piston bounded by a piston head, the liquid passage is inclined with respect to the piston head and has at least one inlet opening formed as a collection funnel leading to the highest point of the passage for receiving cooling oil and, in the region of the lowest point of the passage an outlet opening for the lubrication of a piston pin bearing disposed therebelow. The passage further includes a diffuser-shaped area widening in the flow direction of the cooling oil through the passage.

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