Patent ID: 8521390

Claim:
Hydraulic brake system for a land craft, with a control unit which is adapted to provide control signals for operating the brake system for antilock braking, a master cylinder for generating brake pressure under the control of a driver, a first brake circuit and a second brake circuit with at least one wheel brake in each case, and a first controllable pump for supplying hydraulic fluid in a controlled manner to the at least one wheel brake of the first brake circuit, and a second controllable pump for supplying hydraulic fluid in a controlled manner to the at least one wheel brake of the second brake circuit, a first fluid connection between the outlet side of the first pump and the master cylinder, and a second fluid connection between the outlet side of the second pump and the master cylinder, in which the control unit is adapted to establish a first hydraulic fluid quantity for limiting a quantity of hydraulic fluid to be delivered by the first pump for a pressure build-up phase in antilock braking mode which substantially prevents a flow of hydraulic fluid from the outlet side of the first pump via the first fluid connection to the master cylinder, the control unit is adapted to establish a second hydraulic fluid quantity for limiting a quantity of hydraulic fluid to be delivered by the second pump for a pressure build-up phase in antilock braking mode which substantially prevents a flow of hydraulic fluid from the outlet side of the second pump via the second fluid connection to the master cylinder, the control unit is adapted to establish, by averaging the first hydraulic fluid quantity and the second hydraulic fluid quantity, a common hydraulic fluid quantity which, for at least one of the first and second brake circuits, substantially prevents a flow of hydraulic fluid from the outlet side of the corresponding pump via the respective fluid connection to the master cylinder, one motor is provided for driving the first and the second pump, and the control unit is adapted to provide control signals for the motor in order to limit the quantity of hydraulic fluid in each case delivered by the first and the second pump to the common hydraulic fluid quantity.