BRAKE SYSTEM FOR MOTOR VEHICLES AND METHOD FOR OPERATING THE BRAKE SYSTEM

摘要

A motor vehicle brake system and method operable in a brake by wire and in a fallback operating mode. In addition to a first pressure supply unit a second electrically controllable pressure supply unit having at least one intake port and one pressure port, the intake port of which is connected or connectable to one of the pressure chambers and the pressure port of which is connectable or connected to the brake circuit associated with the pressure chamber. The second pressure supply unit is arranged in the hydraulic connection between one of the pressure chambers of the brake master cylinder and the brake circuit associated with the pressure chamber.