METHOD FOR THE SECURE RELEASE OF AN ELECTROMECHANICALLY ACTUATABLE PARKING BRAKE

摘要

In order to largely prevent the danger of overheating a brake provided with an electromechanically actuatable parking brake, the following steps are provided according to the invention: - driving the threaded spindle (2) by means of the electric motor (7) in the brake application direction until a predetermined, maximum current uptake (Imax) is reached that corresponds to a predetermined brake application force (F), - determining a displacement path (x0) of the brake piston (5) corresponding to the brake application force (F) based on a characteristic rigidity curve (F=f (x) ) of the brake caliper (20) in the determined state stored in the memory; - determining a second displacement path (x1) by adding a further displacement path value (x11), which corresponds to the desired air gap value, to (x0), [ (X1 = X0 + X11) ] - driving the electric motor (7) in the release direction until the second displacement path (X1) has been traveled by the brake piston (5), - comparing the vehicle speed (v) to a predetermined first speed value (V1). When said value is exceeded, the electric motor (7) is again driven in the release direction until a further, already defined displacement path (X12) has been traveled, during which no contact occurs between the friction member (33) and the brake disk of the vehicle brake.