A self-adjusting clutch (10) can include an automatic adjustment mechanism (20) for decreasing an axial dimension within a clutch pack (14). The adjustment can compensate for wear of the facing surfaces of interposed members located within the clutch pack (14), resulting from repeated engaging and disengaging under a clutch apply load within the clutch (10). The adjustment mechanism (20) can include a reaction plate (12) normally biased toward the clutch pack (14) by a plurality of first springs (22). The adjustment mechanism (20) can further include a plurality of pawls (24) supported for rotation by the reaction plate (12) and biased by a plurality of second springs (26) toward a locking position with respect to a ring member (36). The plurality of pawls (24) can lock the reaction plate (12) against axial movement in a direction of the clutch apply load during clutch actuation.

A method for learning a touch point of an engine clutch for a hybrid electric vehicle includes controlling a speed of an engine to have an idle speed. A fluid pipe of a clutch actuator is refilled with a working fluid by driving a driving motor in an idle control state of the engine, a speed of the driving motor is synchronized with the speed of the engine, and then the engine clutch is engaged. The engine clutch is released after the refill is performed, and the speed of the driving motor is decreased. A working fluid is applied so that the engine clutch is operated in an engagement direction by operating the clutch actuator, and a state change of the driving motor is detected. The touch point of the engine clutch is determined based on the state change of the driving motor.

A method for ascertaining a biting point of a friction clutch device of a motor vehicle that is actuatable between a disengaged and an engaged position, the friction clutch device having a hydrostatic actuator device with at least one position sensor and at least one pressure force sensor, the friction clutch device being actuated in the disengagement and/or engagement direction, and data are obtained with the help of the at least one position sensor and the at least one pressure force sensor, while based on the obtained data a position force characteristic curve having a first section and a second section is obtained, the first section being approximated with the help of a linear equation and the second section being approximated with the help of a parabolic equation.

Disclosed are a method and an apparatus for detecting a touch point of a clutch and the method includes: maintaining a touch point of the clutch; correcting a setting value for determining a lowest value by calculating drag torque using a speed and an acceleration of a input shaft to change a detection range of the touch point; setting the lowest value of the speed of the input shaft within the changed detection range of the touch point to a reference value of the input shaft after actuating the clutch; releasing the clutch when the speed of the input shaft is more than a value acquired by adding the reference value of the input shaft and the corrected setting value for determining the lowest value; and updating the touch point as a clutch position matched to the reference value.

A method for learning a contact point of an engine clutch configured to control connection of power between an engine and a motor of a hybrid vehicle is provided. The method includes performing a first learning of the contact point of the engine clutch by increasing a contact speed of the engine clutch and storing information of a first contact point learned by the first learning. A second learning of the contact point of the engine clutch is then performed by decreasing the contact speed of the engine clutch.