Patent ID: 7735618

Claim:
A clutch control device for controlling the operation of a hydraulically actuated clutch, said control device comprising: a volume flow regulating valve for enabling both volume flow regulated filling and volume flow regulated emptying of a hydraulic clutch positioning element; wherein the volume flow regulating valve includes a valve spool that is movable between a filling position, in which a filling volume flow from a hydraulic medium source to the clutch positioning element is released, and an emptying position in which an emptying volume flow from the clutch positioning element is released to a hydraulic medium sink; wherein the valve spool is biased toward its emptying position by a spring that acts against one end of the valve spool, and wherein the valve spool is movable to its filling position by a proportional magnet that acts against an opposite end of the valve spool; and including an orifice plate positioned between the volume flow regulating valve and the hydraulic clutch positioning element, with a pressure on an upstream side of the orifice plate fed back to the end of the valve spool against which the spring acts, and in that a pressure downstream of the orifice plate is fed back to an opposite end of the valve spool against which the proportional magnet acts.