Patent ID: 8602507

Claim:
A method for controlling the activation of a hydraulic vehicle brake system of a motor vehicle which has an electric drive motor which can be operated as a generator in order to brake the motor vehicle, wherein the vehicle brake system has a master brake cylinder which can be activated by muscle force applied to a muscle-force actuation element and to which a wheel brake is connected, and a hydraulic accumulator which is connected to the vehicle brake system via a valve, comprising: if, upon brake activation, the electric drive motor is operated as a generator, opening of the valve causes a brake fluid volume to be conducted into the hydraulic accumulator and, as a result, a wheel brake pressure in the wheel brake is reduced; and generating a force to counter the actuation of the master brake cylinder by the muscle force actuation element when a brake pressure in the vehicle brake system does not provide a conventional muscle force at the muscle-force actuation element, wherein an electromechanical brake force booster coupled to the master brake cylinder generates the force to counter the actuation of the master brake cylinder.