Lock-up control and method thereof

摘要

A lock-up control wherein a temporary release timing of a bridge clutch is adjusted by learning control. According to the learning control, a difference between an estimated engine revolution speed after an instant when the bridge clutch is temporarily released and an actual engine revolution speed is obtained, an integral value is obtained by integrating the difference, and the temporary release timing is adjusted or corrected in such a manner as to decrease a difference between the integral value and a predetermined value.