BRAKE DEVICE FOR A VEHICLE WITH AN ELECTRIC PARKING BRAKE SYSTEM AND CORRESPONDING CONTROL METHOD

摘要

The invention relates to a brake device for a vehicle (1) comprising a hydraulic service brake system with a power supply unit (2, 8), which builds up a brake pressure inside a brake master cylinder (3) of the service brake system according to a pressure demand, this brake pressure being transferred to at least one wheel brake (4), and comprising an electric parking brake system (10, 11, 4). The inventive brake device is characterized in that during the operation of the service brake system, a control unit (12) verifies whether a defect exists in the service brake system on the basis of a comparison of the pressure demand with the brake pressure in at least one wheel brake (4) and/or on the basis of a comparison between a recorded vehicle acceleration and an acceleration of the vehicle expected due to the pressure demand, and that the control unit (12) activates the electric parking brake system (10, 11, 4) when the existence of a defect is established. The invention also relates to a method for controlling the brake system of a vehicle.