Robert Boschgmbh

Andreas Bresser

Michael Knoop

A controller is configured to control at least one valve of a brake system of a vehicle that is closed in a de-energized state. The controller includes an actuation device configured to actuate the valve into an open state and to keep the valve in the open state. A holding current with at least one first average target current strength is output as a control signal by the actuation device to the valve. The holding current output to the valve is increased to at least one second average target current strength which is greater than the first average target current strength while taking into consideration provided information pertaining to a current rotational speed of an electric motor of a piston/cylinder device of the brake system and/or at least one current hydraulic pressure in at least one sub-volume of the brake system.

Controller and method for actuating at least one valve of a brake system of a vehicle, said valve being closed in the de-energized state

A control device for a hydraulic brake system of a vehicle; as a reaction to a supplied warning signal as to a probable, early request for braking, the control device being configured to force at least one wheel exhaust valve of the hydraulic brake system into an open position in an undelayed or delayed manner and to activate a motor of a motorized hydraulic device of the hydraulic brake system; and as a reaction to a supplied brake setpoint signal as to requested braking with a current, setpoint deceleration not equal to zero, the control device being configured to force the at least one wheel exhaust valve into a closed position and to control the motor according to the setpoint deceleration currently requested. The present invention also relates to a hydraulic brake system for a vehicle and to a method for operating a hydraulic brake system of a vehicle.

Control device and method for operating a hydraulic brake system of a vehicle

A slip-controlled hydraulic vehicle brake system includes a first hydraulic pump configured to draw brake fluid out of wheel brakes or out of a hydraulic accumulator connected to the wheel brakes. The brake system also includes two further hydraulic pumps configured to be connected to a brake master cylinder for a rapid pressure buildup. To pump against a high brake pressure while the vehicle brake system is actuated, only the first hydraulic pump is used, while the other two hydraulic pumps are separated from the brake master cylinder and run 'at idle' at the same time. The necessary mechanical driving power of the hydraulic pumps is thereby reduced, and a very rapid pressure buildup is nevertheless possible.

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Ludwigsburg, Germany

Andreas Bresser