Lock-up clutch control device for vehicle, and lock-up clutch control method

A vehicular lockup clutch control device for a vehicle where a torque converter is mounted between an engine and a transmission, wherein the torque converter includes a lockup clutch, the vehicular lockup clutch control device comprising:

• a lockup control part configured to control engagement of the lockup clutch;
• and
• a meeting point learning control part configured to perform a learning control of obtaining a learning value based on information about a meeting point at which the lockup clutch starts torque transmission, wherein the meeting point learning control part is further configured to:
• obtain a present learning detected value when the lockup clutch experiences a transition into engaged state while the vehicle is running, and calculate a present detection error based on a difference between a last learning value memorized and the present learning detected value;
• calculate a present basic correction quantity based on the present detection error;
• when the present detection error has the same sign as a last detection error, set a correction coefficient such that the correction coefficient increases as an absolute value of the last detection error increases;
• calculate a present learning value correction quantity by multiplying the present basic correction quantity by the correction coefficient;
• and
• calculate a present learning value by adding the present learning value correction quantity to the last learning value.