Patent ID: 7080890

Claim:
Method for improving the operation of a hydraulic vehicle brake system having an active hydraulic brake boost, wherein a pressure fluid volume flow between a master brake cylinder and the wheel brakes of the vehicle is controlled by means of an analog or analogized separating valve variable between a pressure increase position and a pressure reduction position, the method comprising: determining an initial substantially unfiltered value for the hydraulic pressure in the master brake cylinder; monitoring the substantially unfiltered value for the hydraulic pressure in the master brake cylinder during a valve transition from the pressure increase position to the pressure reduction position; and controlling the valve position according to a predetermined function which is variable based on the relationship between the monitored substantially unfiltered value of the hydraulic pressure in the master brake cylinder and the initial substantially unfiltered value of the hydraulic pressure in the master brake cylinder and wherein the predetermined function includes a jump function and an adjacent ramp function by means of which a current strength for actuation of the analog or analogized separating valve is controlled.