Patent ID: 6557951
Filing Date: 2003-05-06
Classification: B60T

Abstract:
Brake system with hydraulic brake boosting comprising a hydraulic actuating unit having a hydraulic reservoir, a brake pedal, a brake pressure generator and a pedal travel simulator with a variable displacement volume, a hydraulic unit comprising a pressure generator; a hydraulic wheel brake device; and a control unit for operatively coordinating functions of the actuating unit of the hydraulic unit and of the wheel brake device, wherein the wheel brake device is configured for recirculation of the hydraulic medium and is connected to the displacement volume of the pedal travel simulator by a return line, and the displacement volume of the pedal travel simulator is connected to the hydraulic reservoir, by a hydraulic line to recirculate the hydraulic medium out of the wheel brake device back into the hydraulic reservoir by way of the displacement volume of the pedal travel simulator, and the hydraulic line between the hydraulic reservoir and the displacement volume of the pedal travel simulator includes a return flow valve configured, in the event of a fault from a defective brake system, to be shifted into a shut-off position blocking the hydraulic line.