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Method and apparatus for controlling power flow in a hybrid powertrain system

  • US 20080243346A1
  • Filed: 03/29/2007
  • Published: 10/02/2008
  • Est. Priority Date: 03/29/2007
  • Status: Active Grant
First Claim
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1. Article of manufacture, comprising a storage medium having a machine-executable program encoded therein adapted to operate a hybrid powertrain, the powertrain comprising an internal combustion engine, an energy storage system, an electric machine, and an electromechanical transmission, the energy storage system and electric machine electrically-operatively coupled for power flow therebetween;

  • and, the engine, electric machine, and the electromechanical transmission mechanically-operatively coupled to transmit power therebetween to generate a power flow to an output, the program comprising;

    code to determine an operator torque request;

    code to determine a preferred power flow from the engine to the electro-mechanical transmission and a preferred power flow from the energy storage system to the electric machine based upon the operator torque request;

    code to control operation of the engine, the electric machine, and the electro-mechanical transmission to substantially meet the operator torque request;

    code to monitor actual power flow from the energy storage device during the operation; and

    ,code to control the power flow from the engine based upon a difference between the actual and preferred power flows from the energy storage device.

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