Patent ID: 8556775

Claim:
A system for regulating torque transmitted via a torque converter including a lock up clutch from a crankshaft of an engine of a vehicle to an input shaft of a transmission of the vehicle comprising: a position sensor configured to output data indicative of at least one of an engaged position of the lock-up clutch, a transitional position of the lock-up clutch, and a disengaged position of the lock-up clutch; an engine speed sensor configured to output data indicative of rotational speed of the crankshaft; a controller in electrical communication with the engine speed sensor and the position sensor and configured to, determine when actuation of the lock-up clutch is desired, determine an engine acceleration based on data from the engine speed sensor during a time period in which the controller determines that actuation of the lock-up clutch is desired, determine a torque reduction target based on the engine acceleration, and signal the engine to output torque substantially equal to the torque reduction target.