Patent · US Active

Construction of a hydraulic oil channel between a central valve and a volume accumulator of a camshaft adjuster

US8973544B2 · kind B2 · utility

5Cited by

0References

9Claims

0Family size

Assignee

Schaeffler Technologies AG & Co. KG · DE

Inventors

Michael Busse · Herzogenaurach, DE
Jens Schafer · Herzogenaurach, DE
Martin Steigerwald · Herzogenaurach, DE
Jurgen Plate · Gerhardshofen, DE

Key dates

Filing date	Jan 22, 2013
Grant date	Mar 10, 2015
Priority date	—
Expiry date	Mar 24, 2033

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF01L2820/031
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A directional control valve (2) for controlling a flow of hydraulic oil from a pressure connection (80) via work chambers of a camshaft adjuster (90) to a tank connection (88). The disclosed directional control valve (2) includes an accumulator connection (86) for guiding at least a part of the hydraulic oil flowing out from a work chamber into a volume accumulator (126) before the discharge into the tank connection (88).

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