Slip control apparatus for motor vehicle lock-up clutch

摘要

An apparatus for controlling the amount of slip of a lock-up clutch connecting an input and an output rotary member of a fluid-filled power transmitting device of a motor vehicle, such that the actual slip speed of the lock-up clutch coincides with a target value, the apparatus including (a) a slip control device for providing a slip control output for controlling the clutch according to a slip control equation which includes at least an integral action term, and on the basis of a feedback control value for zeroing a control error between the actual and target slip speeds, and a learning control value which is updated depending upon the vehicle running condition, and (b) an output change restricting device for adjusting the feedback control value such that an amount of change of the slip control output provided by the slip control device is smaller than an amount of change of the learning control value.