Patent · US Active

Control valve for a device for changing the control times of an internal combustion engine

US7849825B2 · kind B2 · utility

5Cited by

3References

18Claims

0Family size

Assignee

Schaeffler Technologies AG & Co. KG · DE

Inventors

Gerhard Scheidig · Oberasbach, DE
Ali Bayrakdar · Pegnitz, DE
Jens Hoppe · Erlangen, DE
Rainer Ottersbach · Bonn, DE

Key dates

Filing date	Aug 4, 2006
Grant date	Dec 14, 2010
Priority date	—
Expiry date	Sep 16, 2027

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/86493
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A control valve (20) for a device for variably setting the control times of gas exchange valves (110, 111) of an internal combustion engine (100). Two working ports (A, B) and one supply port (24) are formed on an outer casing surface of a valve housing (22) of the control valve (20), the working ports (A, B) are arranged directly adjacent one another, and the supply port adjoins them. Further, two pressure medium ducts (40, 41) are formed on the control piston (30), at least one of the pressure medium ducts (40, 41) is embodied so that it is not rotationally symmetric with respect to a longitudinal axis (36) of the control piston (30).

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