Coordination of torque interventions in MPC-based powertrain control

A control system for a propulsion system of a motor vehicle having a transmission and an engine, the control system comprising:

• a command generator module configured to generate a plurality of sets of possible command values;
• a cost module configured to:
• determine a cost for each set of possible command values of the plurality of sets of possible command values based on a first predetermined weighting value, a second predetermined weighting value, a plurality of predicted values, and a plurality of requested values;
• and
• determining which set of possible command values of the plurality of sets of possible command values has a lowest cost;
• and
• a selection module configured to select the set of possible command values that has the lowest cost to define a set of selected command values;
• an arbitration module configured to perform at least one of the following arbitration procedures A and B:
• A) determine at least one requested value of the plurality of requested values based on arbitrating between a driver requested value and an intervention requested value;
• and
• B) determine a desired command value by arbitrating between a selected command value of the set of selected command values and a command intervention value;
• and
• an actuation module configured to control a vehicle parameter based on the desired command value.

A propulsion system for a motor vehicle, comprising:

• an engine operable to power the motor vehicle, the engine having an engine output shaft configured to transfer engine output torque;
• a continuously variable transmission having a variator assembly including a first pulley and a second pulley, the first and second pulleys being rotatably coupled by a rotatable member, at least one of the first and second pulleys including a movable sheave translatable along an axis to selectively change a transmission ratio between the engine output shaft and a transmission output shaft;
• a drive axle configured to be driven via the transmission output shaft, the drive axle being configured to output axle torque to a set of wheels;
• and
• a control system comprising:
• a prediction module configured to generate a plurality of predicted actual axle torque values and a plurality of predicted actual fuel consumption rate values based on a plurality of sets of possible command values, the plurality of sets of possible command values including a plurality of possible commanded transmission ratio values and a plurality of possible commanded engine torque values;
• a cost module configured to:
• determine a cost for each set of possible command values of the plurality of sets of possible command values based on a predicted actual axle torque value of the plurality of predicted axle torque values, a predicted actual fuel consumption rate value of the plurality of predicted actual fuel consumption rate values, a first predetermined weighting value, a second predetermined weighting value, and a plurality of requested values, the plurality of requested values including the driver axle torque requested, an engine output torque requested, a transmission ratio requested, and a fuel consumption rate requested;
• and
• determine which set of possible command values of the plurality of sets of possible command values has a lowest cost;
• a selection module configured to select the set of possible command values that has the lowest cost to define a set of selected command values;
• an axle torque arbitration module configured to determine at least one requested value of the plurality of requested values based on arbitrating between a driver axle torque requested and an axle intervention requested value;
• an engine torque arbitration module configured to determine a desired command value by arbitrating between a selected engine torque command value of the set of selected command values and an engine torque command intervention value;
• and
• an actuation module configured to control a vehicle parameter based on the desired command value.