Patent ID: 7669703

Claim:
A process for the reduction of clutch-grabbing oscillations in a motor vehicle drive, wherein a first drive train portion is connectable by a clutch with a second drive train portion in a torque-transmitting manner, wherein if clutch-grabbing oscillations are detected, a moment, transmitted by the clutch, is changed to counteract the clutch-grabbing oscillations by controlling an actuator that operates an operating member of the clutch in such a manner that the clutch-grabbing oscillations are diminished, wherein the process comprises: determining a controlled modulation voltage by inserting a function defining a required travel modulation into a formula which represents a model for the actuator; measuring, by at least one sensor, at least one actual value of at least one operating property of the clutch; determining a regulated modulation voltage by comparing the at least one actual value, or a calculated value derived from the at least one actual value, to a required value, wherein the required value is determined via a characteristic of the clutch stored in a control device for the clutch; modulating an electric voltage supplied to the actuator, the voltage determining the operation of the actuator, in accordance with the following formula: U M =U MSt *w+U MR *(1 −w ), whereby U M is the electric voltage supplied to the actuator, w is a weighting factor that can assume values of between 0 and 1, U MSt is a controlled modulation voltage that is controlled in a defined manner by the actuator model and the required travel modulation, and, U MR is the regulated modulation voltage regulated by the control device, which regulated modulation voltage is a magnitude that characterizes an operating state of the clutch on the basis of the deviation between the required value and the actual value of the operating property of the clutch.