Abstract: In a braking device for a camshaft adjuster of an internal combustion engine wherein the camshaft adjuster includes at least two adjustment inputs, a respective braking element is provided for each adjustment input to brake the respective adjustment input, the braking elements being operable by an excitation coil arrangement, which, depending on the direction of energization of an excitation coil arrangement, subjects either the one or the other braking element to magnetic flux for initiating braking of the respective adjustment input.

Abstract: In a valve operating control device hysteresis brake particularly for a valve drive of an internal combustion engine, including a hysteresis device rotatable about an axis of rotation so as to be movable along a pole structure of an electromagnet forming a magnetic field effect region in the hysteresis device along the pole structure, a compact and high-performance arrangement is provided for the hysteresis device by an offset in the axial and/or radial direction providing at least two magnetic field effect regions in which the hysteresis device is movably supported.

Abstract: In an adjusting device for a camshaft of an internal combustion engine having a drive element which is driven by a crankshaft of the internal combustion engine, an output element which drives the camshaft of the internal combustion engine, and an actuating element controlled by a brake so as to provide for a relative rotation between the drive element and output element by varying the braking torque effective on the actuating element.