HYDRAULIC MOTOR VEHICLE BRAKE SYSTEMS AND A CONTROL DEVICE SYSTEM THEREFOR, METHODS FOR OPERATING HYDRAULIC MOTOR VEHICLE BRAKE SYSTEMS AND COMPUTER PROGRAM FOR CARRYING OUT THE METHODS

A hydraulic motor vehicle brake system comprises a vehicle dynamic control system which comprises a first brake circuit which acts on at least one first wheel brake, and a second brake circuit which acts on at least one second wheel brake, the first brake circuit comprising a first hydraulic pressure generator and the second brake circuit comprising a second hydraulic pressure generator, which can be actuated electrically for control interventions. Furthermore, the hydraulic motor vehicle brake system comprises an electrically actuable third hydraulic pressure generator, and a controller which is configured to detect failure of at least one of the two brake circuits and a requirement of a control intervention on the at least one brake circuit, to actuate at least the third hydraulic pressure generator for assisting the control intervention.