Method for determining defective control in actuating drive components e.g. for motor vehicle, involves recording actual values for a parameter characterizing the control prior to comparing preset desired values.

摘要

A hydraulic actuating drive (HAD) (20) links to a clutch (10) in order to control it and has for that purpose an adjusting cylinder (26) linked via a hydraulic line (12) to a slave cylinder (11) in the clutch. A control device (27) controls the HAD and responds to a signal that represents a momentary position in the adjusting cylinder. An Independent claim is also included for a drive system for a motor vehicle with a drive unit, a gearbox, a device between the drive unit and gearbox to transfer torque and an actuating drive to control the gearbox and/or the device for transferring torque.