Schaeffler Technologies Ag & Co .kg

Steffen Raecklebe

Torsten Zschieschang

A camshaft adjusting device, including a vane cell adjuster having a stator connectable to a crankshaft and a rotor, which is rotatably supported in the stator and connectable to a camshaft. Webs on the stator, divide an annular space between the stator and the rotor into pressure chambers, wherein the rotor has a rotor hub and vanes extending radially outward from the rotor hub, which vanes divide the pressure chambers into two groups of working chambers having a different acting direction, into each of which working chambers pressure medium flowing in or out in a pressure-medium circuit can be admitted, and a central locking device for locking the rotor in relation to the stator. The central locking device has two spring-loaded locking pins in an accommodating space, and lockable in a locking slot secured to the stator and lock in the locking slot when the rotor rotates from the direction of an 'early' or 'late' stop position into the locking position from different directions, wherein the locking pin forms a valve device together with the particular accommodating space, wherein the locking pin is a step pin.

Camshaft adjusting device

A camshaft phaser having a vane-type phaser having a central-position locking device having locking pins lockable in a locking slot stationary with respect to the stator and locking in the locking slot from different directions. A locking pin has a blocking portion and a flow-through pressure medium conduit, by which a fluid connection between two working chambers of different directions of action can be established or blocked in the different positions of the first locking pin. The working chambers-of the different directions of actions are capable of being short-circuited by a switching device. At least one pressure medium conduit fluidically connectable to the pressure medium circuit by the flow-through pressure medium conduit of the locking pin has a check valve therein which allows the pressure medium to flow into one of the working chambers whose volume is increased during a rotation of the rotor from either of the advance or retard stop positions toward the central locking position, while at the same time preventing backflow from the same working chamber.

Growing community of inventors

Obermichelbach, Germany

Steffen Raecklebe