Multi-objective parameter optimization of control profiles for automatic transmission double-transition shifts

In advanced automatic transmissions (ATs) with a high number of gears, a multi-step, double-transition downshifts (DTS) occur, in which typically two pairs of clutches change their state. This paper proposes different definitions of piecewise linear control profiles for performing such downshifts, which are determined based on insights gained by utilizing previously developed AT control trajectory optimization method. Optimal values of control...