Patent Document ID: 5588937
Application ID: 08504078
Patent Flag: 1

Claim One:
1. An apparatus for controlling an 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, according to a slip control output such that an actual slip speed of the lock-up clutch coincides with a target slip speed, said slip control output being determined according to a slip control equation including at least an integral action term, and on the basis of a feedback control value for zeroing a control error between said actual and target slip speeds, and a learning control value which is updated depending upon a running condition of the vehicle, said apparatus comprising: slip control means for providing said slip control output; and output change restricting means for adjusting said feedback control value such that an amount of change of said slip control output provided by said slip control means is smaller than an amount of change of said learning control value.