Zf Cv Systems Europe Bv

Zf Cv Systems Global Gmbh

Arne Reiners

Peter Beier

Przemyslaw Kowalski

Christoph Moritz

Jan Reiners

An electromechanical brake actuator () for a brake has a cam disc () and a brake plunger () for actuating a brake lever (). The cam disc () and the brake plunger () have contact surfaces in contact with one another for directly transmitting a drive torque. The contact surface of the cam disc () extends at a distance r about the pivot point D, which is defined as a function r(φ) with a change rate r'(φ) and depends on the angular position φ of the cam disc (). The contact surface is configured to effect non-linear transmission between the drive torque of the cam disc () and the force transmitted to the brake plunger ().

Electromechanical brake actuator and cam disc

A method for adjusting the clearance of an electromechanical brake, in particular of a utility vehicle brake, involves the following steps: activating a clearance test cycle for the brake, applying at least one brake lining of the brake in the direction of a brake disc and determining a contact position in which the brake lining enters into contact with the brake disc when application occurs, determining the clearance as well the degree of wear of the lining on the basis of the determined contact position, calculating the clearance which is necessary for the brake and a necessary contact position of the brake lining and brake disc in accordance with the degree of wear of the lining using predefined parameters. The method is performed by a suitable brake and a control device.

Method for adjusting the clearance of an electromechanical brake, brake, and control device

A method for determining a clearance of an electromechanical brake involves the following steps: Activating a clearance determination cycle for the brake, moving an electromechanical brake actuator by a drive motor into a first end position, moving the electromechanical brake actuator via the drive motor toward a second end position, continuously determining a rotor position and/or a motor current of the drive motor during the movement of the brake actuator toward the second end position, determining a contact position at which the brake pad comes into contact with the brake disc, on the basis of the rotor position and/or of the motor current, and determining a clearance and/or a degree of pad wear on the basis of the determined contact position. A suitable electomechanical brake and a respective control unit carry out the method.

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Hannover, Germany

Arne Reiners