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

摘要

In the present invention, a torque converter (4) that includes a lock-up clutch (3) between an engine (1) and a continuously variable transmission (6) is mounted in a vehicle. The vehicle is provided with a meeting point learning control unit (12c) that performs learning control for obtaining a learning value (L), on the basis of information on the meeting point at which the lock-up clutch (3) starts torque transmission. When the lock-up clutch (3) moves from a non-engaged state to a engaged state during vehicle travel, the meeting point learning control unit (12c) estimates the LU transmission torque on the basis of the difference between the engine torque signal value (Te) and the torque converter transmission torque (τ×Ne2), and uses, as the meeting point information, the meeting point detection pressure (LUPRSEDGE) at the time the LU transmission torque estimated value was determined to have entered an upward trend.