Abstract: A method of compensating inaccuracies in a wheel speed sensor wherein signal-forming elements are arranged on a sensor wheel and wherein a determined angle is allocated to a given number of signal-forming elements to determine a wheel speed, and wherein the wheel speed is determined by evaluating the time during which the wheel rotates around the angle, wherein a correction factor which is included in the determination of the wheel rotational speed is memorized with respect to each element to compensate for variations of the signal-forming elements and/or the positioning of the elements, and the correction factors are updated during the driving operation, wherein updating is performed so that the non-corrected wheel speed measured by the sensor is compared with a reference value of the wheel speed established by means of a calculating model, and the correction factor is updated in dependence of this comparison.

Abstract: There is the problem of adjusting a clearance in electromechanically or electromotively operated brakes because automatic resetting means, which are provided for hydraulic brakes, cannot be used in brakes of the above type. Initially, it is necessary to determine a neutral position of the motor which is defined by the friction elements just abutting the brake disc in this position. This situation is determined by a detection device which exhibits the following operation in one preferred embodiment. The motor is driven from an unknown position by a constant motor torque so that the friction linings are moved towards the brake disc. The motor will speed up because the resistances remain constant in the starting stroke. An abrupt deceleration of the motor will be caused when the friction linings are applied to the brake disc. The zero passage of the angular acceleration can be sensed and interpreted as an application of the friction linings on the brake disc.