Patent · US Expired

Valve guidance for an exhaust gas valve of an internal combustion engine

US4798181A · kind A · utility

9Cited by

3References

14Claims

0Family size

Assignee

Dr. Ing. h.c. F. Porsche AG · DE

Inventors

Michael Beer · Wimsheim, DE
August Hofbauer · Pforzheim, DE
Erwin Knoll · Weißenhorn, DE

Key dates

Filing date	Mar 27, 1987
Grant date	Jan 17, 1989
Priority date	—
Expiry date	Mar 27, 2007

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T29/493
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A valve guidance for an exhaust gas valve in the form of a disk valve of an internal combustion engine which is used for the control of an exhaust gas channel of an internal combustion engine; a guide body with good heat-conducting and sliding properties serves as valve guidance. The guide body is coated at the inlet place of the valve stem either with a hard metal coating applied by plasma-spray process or with a hard metal sleeve.

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