Patent ID: 8892283

Claim:
A method for controlling a powertrain system comprising an internal combustion engine and a multi-mode transmission including a plurality of torque machines, the method comprising: determining, by a controller, minimum and maximum states for an object component of interest based upon a plurality of linear constraints, said linear constraints associated with operating parameters for the torque machines and the multi-mode transmission; determining minimum and maximum objective battery powers based upon the minimum and maximum states for the object component of interest; when the minimum and maximum objective battery powers are within minimum and maximum battery power limits, employing the minimum and maximum states for the object component of interest to control the powertrain system; and when the minimum and maximum objective battery powers are outside the minimum and maximum battery power limits, executing a problem recomposition process to recompose the minimum and maximum battery power limits and the plurality of linear constraints, determining recomposed minimum and maximum states for the object component of interest based upon the recomposed minimum and maximum battery power limits and the recomposed linear constraints, and employing the recomposed minimum and maximum states for the object component of interest to control the powertrain system.