Method and device for operating a hydraulic braking system, braking system and vehicle

A method for operating a hydraulic braking system for a motor vehicle, the braking system including a main brake cylinder actuatable by a driver and at least one brake circuit connected to the main brake cylinder, which includes at least one hydraulically actuatable wheel brake, at least one activatable inlet valve for adjusting a braking force of the wheel brake being connected upstream from the wheel brake, and including an activatable pressure generating unit configured to generate a hydraulic pressure in the at least one brake circuit, also independently of an actuation of the main brake cylinder, when a pressure demand occurs, and including an activatable auxiliary pressure generating unit configured to alternatively generate the hydraulic pressure in the at least one brake circuit, the pressure generating unit being monitored for malfunctions and upon recognition of a malfunction, the auxiliary pressure generating unit being activated to generate the hydraulic pressure, the pressure generating unit being assigned a first control valve configured to establish or to interrupt a connection to the auxiliary pressure generating unit and the auxiliary pressure generating unit being assigned a second activatable control valve configured to interrupt or to establish a connection to the main brake cylinder, the method comprising:

• monitoring the braking system for an occurrence of a brake demand;
• and
• activating, upon detection of a brake demand, the second control valve to interrupt the connection to the main brake cylinder.

A device for operating a hydraulic braking system for a vehicle, the braking system including a main brake cylinder actuatable by a driver and at least one brake circuit connected to the main brake cylinder, which includes at least one hydraulically actuatable wheel brake, at least one activatable inlet valve for adjusting an activatable braking force of the wheel brake being connected upstream from the wheel brake, and including an activatable pressure generating unit configured to generate a hydraulic pressure in the at least one brake circuit, also independently of an actuation of the main brake cylinder, when a brake demand is detected, and including an activatable auxiliary pressure generating unit configured to alternatively generate the hydraulic pressure in the at least one brake circuit, and the pressure generating unit being assigned a first control valve for establishing or interrupting a connection to the auxiliary pressure generating unit, and the auxiliary pressure generating unit being assigned a second activatable control valve for establishing or interrupting a connection to the main brake cylinder, the device comprising:

• a control unit configured to:
• monitor the braking system for an occurrence of a brake demand;
• and
• activate, upon detection of a brake demand, the second control valve to interrupt the connection to the main brake cylinder.

A hydraulic braking system for a motor vehicle, the braking system comprising:

• a main brake cylinder actuatable by a driver;
• at least one brake circuit connected to the main brake cylinder, which includes at least one hydraulically actuatable wheel brake, at least one activatable inlet valve for adjusting an activatable braking force of the wheel brake being connected upstream from the wheel brake, an activatable pressure generating unit configured to generate a hydraulic pressure in the at least one brake circuit, also independently of an actuation of the main brake cylinder, when a brake demand is detected, and an activatable auxiliary pressure generating unit configured to alternatively generate the hydraulic pressure in the at least one brake circuit, wherein the pressure generating unit is assigned a first control valve for establishing or interrupting a connection to the auxiliary pressure generating unit, and the auxiliary pressure generating unit is assigned a second activatable control valve for establishing or interrupting a connection to the main brake cylinder;
• and
• a device including a control unit configured to:
• monitor the braking system for an occurrence of a brake demand;
• and
• activate, upon detection of a brake demand, the second control valve to interrupt the connection to the main brake cylinder.

A motor vehicle including a hydraulic braking system, the hydraulic braking system comprising:

• a main brake cylinder actuatable by a driver;
• at least one brake circuit connected to the main brake cylinder, which includes at least one hydraulically actuatable wheel brake, at least one activatable inlet valve for adjusting an activatable braking force of the wheel brake being connected upstream from the wheel brake, an activatable pressure generating unit configured to generate a hydraulic pressure in the at least one brake circuit, also independently of an actuation of the main brake cylinder, when a brake demand is detected, and an activatable auxiliary pressure generating unit configured to alternatively generate the hydraulic pressure in the at least one brake circuit, wherein the pressure generating unit is assigned a first control valve for establishing or interrupting a connection to the auxiliary pressure generating unit, and the auxiliary pressure generating unit is assigned a second activatable control valve for establishing or interrupting a connection to the main brake cylinder;
• and
• a device including a control unit configured to:
• monitor the braking system for an occurrence of a brake demand;
• and
• activate, upon detection of a brake demand, the second control valve to interrupt the connection to the main brake cylinder.