Patent ID: 8706370

Claim:
A lockup clutch control apparatus for controlling slippage of a lockup clutch to a desired slippage by manipulating a clutch engagement force of the lockup clutch, wherein an engine is provided with a supercharger, and a torque converter is disposed between the engine and an automatic transmission and provided with the lockup clutch, the lockup clutch control apparatus comprising: a controller configured to: calculate an estimated value of torque inputted to the lockup clutch; determine whether the engine is operating in a predetermined supercharger lag region in which the estimated value deviates from an actual value of the torque; and perform a control operation while controlling slippage of the lockup clutch, wherein the control operation includes: setting the clutch engagement force based on the estimated value; and performing a first operation of correcting the clutch engagement force by reducing the clutch engagement force in response to determining that the engine is operating in the supercharger lag region.