Patent ID: 6749271
Filing Date: 2004-06-15
Classification: B60T

Abstract:
A braking system for a vehicle, comprising:a service brake valve; first and second ABS-valves of a vehicle axle, each ABS-valve being connected to the service brake valve by way of a pneumatic line; first and second pneumatic/hydraulic converters respectively connected to the first and second ABS-valves, said converters converting a brake pressure pneumatically controlled into the converters by way of the respective ABS-valve into a hydraulic brake pressure for an assigned hydraulic circuit for an assigned vehicle brake, each assigned hydraulic circuit being independent; first and second sensors, for sensing physical quantities which occur during the controlling-in of the brake pressure defined by a driver of the vehicle, the first and second sensors being integrated into the respectively assigned first and second converters, said sensors responding and generating a warning signal when, during a ventilation of the respectively assigned pneumatic/hydraulic converter, a pneumatic piston of the converter is in a stop position indicating a failure of the assigned hydraulic circuit; and an electronic brake control unit operatively coupled with the first and second sensors of the pneumatic/hydraulic converters, said control unit controlling the ABS-valve such that, when one of the first and second sensors responds with the warning signal indicating the failure of the assigned hydraulic circuit, the control unit limits only the brake pressure controlled into the vehicle brake assigned to the hydraulic circuit of the other sensor to a defined maximum pressure.