Filling of a volume accumulator in a camshaft adjuster
AssigneeSchaeffler Technologies AG & Co. KG
InventorsJens Schafer, Martin Steigerwald, Michael Busse, Jurgen Plate, Steffen Racklebe, Andreas Wedel, Olaf Boese, Robert Heinemann
Life of this patent
Estimating the term…
Abstract
A directional valve (30) for controlling a hydraulic oil flow from a pressure port (34) via working chambers of a camshaft adjuster (4) to a tank port (58). The directional valve (30) includes an accumulator port (36) for conducting at least a part of the hydraulic oil flowing out of a working chamber into a volume accumulator (54) before said hydraulic oil flows out into the tank port (58), and the accumulator port (36) is connected via a passage (60) to the pressure port (34).
Claims10
A directional valve for controlling a hydraulic oil flow from a pressure port via working chambers of a camshaft adjuster to a tank port, comprising an accumulator port for conducting at least a part of the hydraulic oil flow out of one of the working chambers into a volume accumulator before said hydraulic oil flows out into the tank port, and the accumulator port is connected via a passage to a pressure port.
A method for filling a volume accumulator in a camshaft adjuster with a hydraulic liquid, comprising:
- connecting the volume accumulator to a pressure port of the camshaft adjuster, and shutting off the connection when the volume accumulator has been filled.
Dependencies are inferred from the claim text.