LOCK-UP CLUTCH CONTROL METHOD FOR VEHICLE, AND LOCK-UP CLUTCH CONTROL DEVICE FOR VEHICLE

摘要

A vehicle lock-up clutch control method in which output of an engine 1 is transmitted to an automatic transmission 4 via a torque converter 2 having a lock-up clutch 5, comprising: controlling a transmission torque capacity of the lock-up clutch 5 such that the slip rotation speed of the lock-up clutch 5 becomes 0 (rpm) after completion of the downshift when the automatic transmission 4 is downshifted while executing a slip control of the lock-up clutch 5 from a non-engaged state to an engaged state during an accelerator operation.