Abstract: A propulsion system, control system, and method use model predictive control systems to generate a plurality of sets of possible command values and determine a cost for each set of possible command values. The set of possible command values that has the lowest cost is determined and defined as a selected set of command values. In some circumstances, the MPC-determined command value may be replaced by another transmission ratio command based on override inputs. Minimum and maximum transmission ratios are determined based on the override inputs, and a constrained (or arbitrated) transmission ratio is determined therefrom. The constrained or arbitrated transmission ratio is used to determine whether to apply an MPC-determined transmission ratio or a transmission ratio based on the arbitrated transmission ratio to determine an ultimate commanded transmission ratio. Pressure(s) are commanded to a transmission pulley assembly, which is configured to implement the ultimate commanded transmission ratio.

Abstract: A method for controlling a propulsion system of a motor vehicle includes: optimizing both torque control and fuel economy during transient operating conditions; performing a steady state control enable function to identify when steady state operating conditions are present including: determining a commanded axle torque; obtaining a measured actual axle torque; and identifying when the commanded axle torque is substantially equal to the measured actual axle torque and outputting a signal; and further includes: directing the signal output from the control enable function to each of an integral action calculator and a Ym filter; performing an integral action calculation to identify an axle torque integral action; and setting a steady state flag when steady state operating conditions are present which fixes system variables directed to optimizing torque control, temporarily ceasing further optimization of torque control when the steady state flag is set.

Abstract: A propulsion system, control system, and method use model predictive control systems to generate a plurality of sets of possible command values and determine a cost for each set of possible command values. The set of possible command values that has the lowest cost is determined and defined as a selected set of command values. In some circumstances, the MPC-determined command value may be replaced by another transmission ratio command based on override inputs. Minimum and maximum transmission ratios are determined based on the override inputs, and a constrained (or arbitrated) transmission ratio is determined therefrom. The constrained or arbitrated transmission ratio is used to determine whether to apply an MPC-determined transmission ratio or a transmission ratio based on the arbitrated transmission ratio to determine an ultimate commanded transmission ratio. Pressure(s) are commanded to a transmission pulley assembly, which is configured to implement the ultimate commanded transmission ratio.