Schaeffler Technologies Ag & Co .kg

Enno Schmitt

Jochen Thielen

Gerhard Scheidig

Michael Keck

A hydraulic camshaft adjuster adjusts the control time of gas exchange of an internal combustion engine. A reservoir for storing pressure medium is formed on a cover of the hydraulic camshaft adjuster. An overflow opening of the cover is dimensioned such that a volume of pressure medium remains in the reservoir when the hydraulic camshaft adjuster is stationary. This ensures that pressure medium is supplied to the return valve of a central locking mechanism when the engine is running.

Hydraulic camshaft adjuster, and method for operating the hydraulic camshaft adjuster

The disclosure relates to a hydraulic camshaft adjuster having a stator, which is synchronously rotatable with a crankshaft of the internal combustion engine, a rotor rotatably arranged relative to the stator and synchronously rotatable with a camshaft, two groups of working chambers that can each be loaded with a pressure medium in a pressure medium circuit, and a central locking device for locking the rotor in a defined position relative to the stator. The stator is delimited on a first front end by a multi-part locking cover. The multi-part locking cover has a first locking cover and a second locking cover. A first stage of a mechanical ratchet is formed on the first locking cover, and at least one further stage of the mechanical ratchet is formed on the second locking cover.

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Kulmbach, Germany

Enno Schmitt