Patent · US Active

Device for variably adjusting control times of gas exchange valves of an internal combustion engine

US8522733B2 · kind B2 · utility

4Cited by

4References

11Claims

0Family size

Assignee

Schaeffler Technologies AG & Co. KG · DE

Inventors

Jens Hoppe · Erlangen, DE
Andreas Roehr · Heroldsbach, DE

Key dates

Filing date	Nov 24, 2008
Grant date	Sep 3, 2013
Priority date	—
Expiry date	May 29, 2029

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF01L2001/34426
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A device for variably adjusting control times of gas exchange valves of an internal combustion engine. The device has a drive element, an output element, a rotation angle limiting device and a control valve and counter-working pressure chambers are also provided. Phase adjustment between the output and drive element is initiated by applying pressure to one pressure chamber while discharging the other pressure chamber. The rotation angle limiting device can be locked or unlocked to prevent or allow phasing. The control valve has a valve housing and a control piston. An inflow connection, an outflow connection, a control connection and two working connections are embodied on the valve housing.

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