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, comprising:

• a vehicle dynamic control system which is of dual-circuit configuration and which comprises a first brake circuit which acts on one or more first wheel brakes, and a second brake circuit fluidly isolated from the first brake circuit which acts on one or more second wheel brakes different from the one or more first wheel brakes, the first brake circuit comprising a first hydraulic pressure generator which can be actuated electrically for control interventions, and the second brake circuit comprising a second hydraulic pressure generator which can be actuated electrically for control interventions and which can be actuated independently of the first hydraulic pressure generator;
• a third hydraulic pressure generator independently electrically actuatable from the first and second hydraulic pressure generators which is configured to generate a hydraulic pressure for at least one of the two brake circuits;
• and
• a controller which is configured:
• to detect a functional loss of the third hydraulic pressure generator and a driver's braking request;
• and,
• if the functional loss of the third hydraulic pressure generator and the driver's braking request are detected, to actuate the first hydraulic pressure generator and the second hydraulic pressure generator, in order to generate a hydraulic pressure in at least one of the brake circuits in accordance with the driver's braking request.

A hydraulic motor vehicle brake system comprising:

• a vehicle dynamic control system which is of dual-circuit configuration and which comprises a first brake circuit which acts on one or more first wheel brakes, and a second brake circuit fluidly isolated from the first brake circuit which acts on one or more second wheel brakes different from the one or more first wheel brakes, the first brake circuit comprising a first hydraulic pressure generator which can be actuated electrically for control interventions, and the second brake circuit comprising a second hydraulic pressure generator which can be actuated electrically for control interventions and which can be actuated independently of the first hydraulic pressure generator;
• a third hydraulic pressure generator independently electrically actuatable from the first and second hydraulic pressure generators which is configured to generate a hydraulic pressure for at least one of the two brake circuits;
• and
• a controller which is configured:
• to detect a functional loss of at least one of the two brake circuits and a requirement of a control intervention on the at least one brake circuit which is affected by the functional loss;
• and,
• if the functional loss and the requirement of a control intervention are detected, to actuate at least the third hydraulic pressure generator for carrying out or assisting the control intervention;
• a first control unit which is configured to actuate the first hydraulic pressure generator;
• a second control unit which is configured to actuate the second hydraulic pressure generator;
• and
• a third control unit which is configured to actuate the third hydraulic pressure generator.