Patent ID: 7770982

Claim:
In an electrohydraulic brake system for a vehicle, the system comprising: a muscle-force-actuatable auxiliary brake including a master cylinder and an actuating device for the master cylinder, an external-force-actuatable service brake including an electronic control unit and a pressure generator unit triggerable by the control unit, the pressure generator unit including a drive and a pressure source, an electronically triggerable valve assembly for switching the brake system over from the service braking state to the auxiliary braking state, at least one hydraulic wheel brake, at least one device for modulating the brake pressure at the wheel brake, which modulating device is interposed between the valve assembly for switching over the brake system and the at least one wheel brake and being triggerable by the control unit, and a piston/cylinder unit for simulating the pedal travel during the service braking state, which in the auxiliary braking state is connected to the master cylinder in a hydraulically blockable manner, the improvement wherein a valve of said valve assembly for switching over the brake system is interposed between the master cylinder and the piston/cylinder unit such that a subjection of the piston/cylinder unit to pressure medium is controlled by said valve, and further comprising a pressure sensor disposed between the valve of the valve assembly that controls the piston/cylinder unit and the piston/cylinder unit.