Automatic calibration process for optimal control of clutch engagement during launch

Launching a vehicle is related to changing acceleration. High acceleration is desired for sporty driving behavior, however, jerk as change of acceleration and change of jerk are major sources of discomfort. Modern double-clutch transmissions allow to shape the acceleration transition by controlling the torque transmitted by the clutch, which is why the question arises about an optimal transition law for the acceleration and optimal calibration of automatic transmissions. A bi-criterion optimization problem is formulated to account for both sportiness and comfort, where the latter criterion is defined as deviation from an ideal acceleration transition. For finding such an optimal transition, another tri-criterion optimization problem is set up and solved analytically. The calibration of the transmission TCU is then performed in a SIL (Software-in-the-Loop) environment where results demonstrate the validity of the proposed approach.