Patent ID: 8138703
Filing Date: 2012-03-20
Classification: B60K,B60L,B60W,F16H,Y02T,Y10T

Abstract:
1. Method for controlling a powertrain system including a transmission operative to transfer power between an engine coupled to an input member and a plurality of torque machines and an output member, the method comprising: monitoring system operation and determining an output torque request; determining a closed loop speed error; determining motor torque offsets to the torque machines based upon the closed loop speed error; determining output torque constraints based upon the motor torque offsets and the system operation; determining an output torque command based upon the output torque request and the output torque constraints; determining preferred motor torque commands for the torque machines based upon the output torque command; reducing the preferred motor torque commands for the torque machines using the motor torque offsets to the torque machines; and adjusting the reduced preferred motor torque commands for the torque machines based upon the closed loop speed error.