Patent ID: 7431133
Filing Date: 2008-10-07
Classification: B60T,F16D

Abstract:
1. Method for actuating an electromechanical parking brake device for a brake that can be actuated by means of an electromechanical actuator, in which the actuator is comprised of an electric motor and a reduction gear that is connected downstream of the electric motor and is provided for converting a rotational motion into a translatory motion, and the electromechanical parking brake device is provided in the form of a locking mechanism which can prevent the rotational motion of the actuator in the direction of release and which can only be released again by further application, wherein during the actuation of the parking brake device, a mean value M park of the torque of the electric motor, which is required for exerting the application force of the brake corresponding to the application of the parking brake, is determined and stored while the actuator position (φ) is simultaneously detected, and the electric motor is actuated at later points in time in such a fashion that it generates said torque M park that is multiplied by a correction factor kη=>1 in order to maintain or increase the exerted tension force, wherein the determined mean torque value (Mpark) is controlled with regard to a lower limit value and is set to this lower limit value when it falls below this limit value.