Method and apparatus to determine extrema for controlling a multi-mode powertrain system

摘要

A powertrain system includes an internal combustion engine, a multi-mode transmission having a plurality of torque machines, and a driveline. A method to determine extrema for an objective function employed to control operation of the powertrain system includes establishing an objective component equation related to an objective function and corresponding to an object component of interest. A plurality of linear constraints and a non-linear constraint are imposed on the objective component equation. The objective component equation is solved in relation to the plurality of linear constraints and the non-linear constraint to determine the extrema for the objective function. The extrema for the objective function are employed to control operation of the powertrain system.

主权项

1. A method to control operation of a powertrain system including an internal combustion engine, a multi-mode transmission and a plurality of torque machines, said transmission configured to transfer torque among the engine, the torque machines, and an output member, the method comprising:
establishing an objective component equation corresponding to an object component of interest; imposing, by a controller, a plurality of linear constraints and a non-linear constraint on the objective component equation; solving the objective component equation in relation to the plurality of the linear constraints and the non-linear constraint to determine extrema for the object component of interest; and employing said extrema to control operation of the powertrain system.