Method of avoiding the hydraulic fallback level in a brake system of a motor vehicle

A method for regulating a hydraulic brake system of a motor vehicle having a linear actuator as a driver-independent pressure provision device, and a hydraulic valve arrangement disposed between the linear actuator and wheel brakes of the hydraulic brake system, the method comprising:

• carrying out a holding mode in response to a reduced availability of the linear actuator, wherein the hydraulic pressure in the wheel brakes is shut in utilizing the valve arrangement and a power output of the linear actuator is reduced;
• measuring the system pressure gradient in the holding mode;
• and
• carrying out a transition from the holding mode into an alternative mode based on the system pressure gradient.

A hydraulic brake system for a motor vehicle comprising:

• a linear actuator as a driver-independent pressure provision device;
• a hydraulic valve arrangement disposed between the linear actuator and wheel brakes of the vehicle;
• and
• a control device configured to
• carry out a holding mode in response to a reduced availability of the linear actuator, wherein the hydraulic pressure in the wheel brakes is shut in utilizing the valve arrangement and a power output of the linear actuator is reduced,
• measure the system pressure gradient in the holding mode, and
• carry out a transition from the holding mode into an alternative mode based on the system pressure gradient.