Patent ID: 8657095

Claim:
A control device for controlling an automated clutch, comprising: a hydraulic clutch actuating system having: a master cylinder including a master piston and a piston rod; a threaded spindle engaged with the piston rod; an actuator arranged to displace the threaded spindle in a longitudinal direction to displace the piston rod in the longitudinal direction; an electric motor actuating drive arranged to provide an actuating force to displace the actuator in the longitudinal direction, and including an incremental displacement sensor; an absolute displacement sensor, separate from the incremental displacement sensor, and arranged to measure a position of the actuator; and, a control device configured to control a position of the actuator by combining: a first signal corresponding to a previously detected position of the actuator; a second signal corresponding to position increments from the incremental displacement sensor; and, a third signal from the absolute displacement sensor.