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Method of power management for a hybrid powertrain system

  • US 5,999,864 A
  • Filed: 04/23/1997
  • Issued: 12/07/1999
  • Est. Priority Date: 04/23/1997
  • Status: Expired due to Term
First Claim
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1. A method of power management control for a hybrid powertrain system, said method comprising the steps of:

  • determining a storage power from a power flow into or out of an energy storage apparatus;

    determining an actual level of energy stored in the energy storage apparatus;

    determining a desired level of energy stored in the energy storage apparatus;

    determining an energy storage level error from a difference between the desired level of energy stored and the actual level of energy stored;

    determining an engine power change from the energy storage level error and an actual storage power flow by calculating a power level error as a function of the energy storage level error and an actual storage power flow error;

    calculating and engine power setting based upon the engine power change; and

    modifying an engine power output by the engine power setting.

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