Patent ID: 8645039

Claim:
A multi-circuit motor vehicle brake system for controlling hydraulic brakes, electric brakes and stability control of the motor vehicle, the multi-circuit system comprising: an integrated electronic brake force distribution unit including i) a hydraulic control unit for controlling the hydraulic brakes, and ii) an electronic control unit for controlling both the electric brakes and the stability control of the motor vehicle, wherein the integrated electronic brake force distribution unit controls a plurality of brake calipers with hydraulically operable actuators which are hydraulically connected to the hydraulic control unit comprising a motor pump unit for the hydraulic supply of power, wherein the hydraulically operable actuators are configured to be operated by hydraulic operating means under the initiation of a driver, and/or are configured to be operated by the integrated electronic brake force distribution unit independently of the driver, wherein at least some of the brake calipers additionally or separately have electromechanical actuators, wherein at least one electrical current source is electrically connected to the integrated electronic brake force distribution unit, which is configured for supplying electricity to the integrated electronic brake force distribution unit, wherein the integrated electronic brake force distribution unit is connected to the electromechanical actuators by at least two respective separate electrical supply lines, and wherein the integrated electronic brake force distribution unit has at least one electrical semi-conductor switch in order to supply electricity to the electromechanical actuators, wherein in response to an electromechanical brake of the vehicle being manually activated by the driver of the vehicle using a man-machine interface, the electronic control unit automatically performs the following steps; measuring or ascertaining a maximum actual current that is demanded by the electromechanical actuators; comparing the maximum actual current with a prescribed target current value in order to ascertain a tensioning force deficit of the electric brake; and activating the hydraulic control unit to control a hydraulic actuator to apply an additional tightening force to the hydraulic brakes to supplement the electromechanical actuators based on the tensioning force deficit that has been ascertained.