Bypass oil supply for an oil volume accumulator of a hydraulic camshaft phaser
AssigneeSchaeffler Technologies AG & Co. KG
InventorJuergen Weber
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Abstract
The disclosure relates to a hydraulic camshaft phaser for relative rotation between a camshaft and a crankshaft. The camshaft phaser comprising two oppositely acting working chambers to which hydraulic medium pressure can be applied in a controlling manner by means of a hydraulic valve, thereby causing a relative rotation between the camshaft and the crankshaft. A volume accumulator formed by the camshaft phaser collects the hydraulic medium exiting from the working chambers. The volume accumulator is divided into two partial volume accumulators which flank the working chambers in an axial direction and which are connected to one another by a hydraulic medium line which extends axially through the camshaft phaser and is independent of the working chambers.
Claims20
A hydraulic camshaft phaser configured to adjust relative rotation between a camshaft and a crankshaft, comprising:
- two oppositely acting working chambers to which hydraulic medium pressure can be controllably applied via a hydraulic valve, thereby causing a relative rotation between the camshaft and the crankshaft,
- a volume accumulator formed by the hydraulic camshaft phaser, the volume accumulator configured to collect hydraulic medium, and
- the volume accumulator is divided into two partial volume accumulators;
- i) arranged to flank the two oppositely acting working chambers in an axial direction, and ii) connected to one another by a hydraulic medium line extending axially through the hydraulic camshaft phaser and independent of the two oppositely acting working chambers.
A hydraulic camshaft phaser configured to adjust relative rotation between a camshaft and a crankshaft, comprising:
- working chambers to which hydraulic medium pressure can be controllably applied via a hydraulic valve, thereby causing a relative rotation between the camshaft and the crankshaft, the working chambers formed by a drive element and an output element,
- a volume accumulator formed by the hydraulic camshaft phaser, the volume accumulator configured to collect hydraulic medium, and
- the volume accumulator is divided into two partial volume accumulators:
- i) arranged at each axial end of the hydraulic camshaft phaser, and ii) connected to one another by a hydraulic medium line extending axially through the drive element independent of the working chambers.
Dependencies are inferred from the claim text.