Patent ID: 6550871
Filing Date: 2003-04-22
Classification: B60T

Abstract:
A method for controlling a brake of a motor vehicle actuated electromechanically by an actuator having an electric motor and a drive mechanism positioned downstream of the electric motor, the electric motor exhibiting a speed-torque characteristic curve defined by design of the electric motor, the method comprising:receiving a difference value indicative of a value between the difference of a desired value and an actual value of an actuating force (FBet,Soll) as an input value; generating a set value (Iq,Soll) of a torque-producing current; receiving the desired and actual values of the actuating force (FBet,Soll, FBet,Ist), a set value of an actuating force gradient (FBet,Soll), and signals representing an actual value (&ohgr;Mot,Ist) of a position of the electric motor and the actual value of the motor speed; generating a set value (Id,Soll) of a field-weakening current; and converting the set values of the torque-producing current and the field-weakening current as well as a signal representing a actual value (&ohgr;Mot,Ist) of the electric motor position to a signal (UMot) that represents a voltage to be applied to the electric motor, affecting a rise of the speed-torque characteristic curve of the electric motor.