Patent ID: 6926373

Claim:
Method for improving the control behavior or a vehicle brake system with anti-lock control (ABS) or occurrence of road irregularities, comprising: evaluating the rotational behavior of a plurality wheels for anti-lock control, detecting road irregularities when the anti-lock control sets in subsequent to a partial braking operation, interpreting a brief pressure reduction phase, followed by a high re-acceleration of at least one of said plurality of wheels, as a road irregularity if t reduction /T×A cc >TH 1 or t reduction /T×A ccmax >TH 2 , wherein t reduction refers to the duration of pressure reduction, T refers to the duration of the pressure reduction phase, A cc refers to the re-acceleration of one of the vehicle's wheels, A ccmax refers to the maximum value of the re-acceleration, and where TH 1 , TH 2 refer to the predetermined limit values increasing the rate of increase of a braking pressure compared to a standard rate of increase of braking pressure invoked under conditions where no road irregularities exist.