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Control architecture for output torque shaping and motor torque determination for a hybrid powertrain system

  • US 8,204,656 B2
  • Filed: 10/15/2008
  • Issued: 06/19/2012
  • Est. Priority Date: 11/04/2007
  • Status: Expired due to Fees
First Claim
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1. Method for controlling a powertrain system including a transmission device operative to transfer power between an input member and a plurality of torque machines and an output member, the torque machines connected to an energy storage device and the transmission device operative in one of a plurality of fixed gear and continuously variable mode operating range states, the method comprising:

  • monitoring available power from the energy storage device;

    determining system constraints;

    executing an optimization algorithm to determine constraints on an output torque to the output member comprising a maximum output torque, a minimum output torque, and a preferred output torque in response to the system constraints and the available power from the energy storage device;

    determining an operator torque request including an acceleration request and a braking request;

    determining a net output torque command in response to the acceleration request and the braking request and constrained within the maximum output torque and the minimum output torque;

    executing the optimization algorithm to determine preferred torque commands for each of the torque machines based upon the net output torque command and in response to the system constraints and the available power from the energy storage device; and

    controlling operation of the torque machines in response to the preferred torque commands.

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