Lock-up clutch control device

A control device of a lock-up clutch,

• wherein as applied in a vehicle where a motive power source, an automatic transmission, a hydraulic power transmission device disposed between the motive power source and the automatic transmission, and a lock-up clutch directly connecting an input side and an output side of the hydraulic power transmission device are mounted,
• a deceleration lock-up control performing engagement control of the lock-up clutch during vehicle deceleration, a lock-up smooth off control gradually disengaging the lock-up clutch at a sweep gradient upon completion of the deceleration lock-up control, a lock-up smooth off initial pressure learning control learning a disengagement initial pressure of the lock-up smooth off control, and a deceleration lock-up differential pressure learning control reflecting a learning value of a disengagement initial pressure of the lock-up smooth off control in a deceleration lock-up differential pressure during the deceleration lock-up control are executed, and
• a first correction means for correcting the disengagement initial pressure of the lock-up smooth off control upon entry into the deceleration lock-up differential pressure learning control and a second correction means for changing the sweep gradient of the lock-up smooth off control upon entry into the deceleration lock-up differential pressure learning control are provided.