Patent ID: 9056598
Filing Date: 2015-06-16
Classification: B60T

Abstract:
1. A method for setting a clamping force applied by a parking brake of a brake system, which clamping force is at least partially generated by an electromechanical brake device that includes an electric actuator and additionally by a hydraulic brake device as needed, a hydraulic pressure being supportively active at a brake piston when the hydraulic brake device is actuated, the brake piston being adjusted by a total clamping force composed of an electromechanical clamping force generated by the electric actuator and a hydraulic clamping force generated by the hydraulic brake device, the method comprising: ascertaining, by a control unit of the brake system, the hydraulic pressure; and assigning, to the hydraulic pressure and by the control unit, a pressure reference path which is compared with an actuator path ascertained from a motor state variable of the actuator, the total clamping force being provided with aid of the electromechanical clamping force in an event that the pressure reference path and the actuator path deviate significantly from each other; wherein the actuator path corresponds to a free travel between a reference point, which coincides with a stopping point of the actuator in a retracted out-of-operation state, and a force increase point of the actuator.