Patent ID: 7350634

Claim:
A method for adjustment of an incremental path measurement unit in an actuation device of a pressure-closed clutch, where the actuation device contains an actuator ( 10 , 12 , 14 ) whose position is acquired by an incremental sensor ( 42 ) and that is connected with a transmitter piston ( 16 ) which is displaceably contained in a cylinder unit ( 18 ) and having a snifting borehole ( 34 ), the cylinder unit ( 18 ) is connected via a hydraulic segment ( 22 ) to a receiving cylinder ( 30 ) with a displaceable receiver piston ( 26 ) which actuates the clutch ( 28 ), which method involves the following steps: acquiring a force that the actuator ( 10 , 12 , 14 ) needs to move the transmitter piston ( 16 ); acquiring an output signal of the incremental sensor ( 42 ) at a point in time at which the force changes abruptly as the transmitter piston ( 16 ) runs over the snifting borehole ( 34 ); and, fixing the output signal of the incremental sensor ( 42 ) at the point in time of the abrupt change as a new reference signal.