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Method for managing electric power in a powertrain system

  • US 8,847,426 B2
  • Filed: 10/19/2008
  • Issued: 09/30/2014
  • Est. Priority Date: 11/02/2007
  • Status: Expired due to Fees
First Claim
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1. Method for controlling a powertrain system comprising a transmission operative to transfer power between a plurality of power actuators and an output member, and an energy storage device, the method comprising:

  • regularly establishing a first set of electric power limits and a second set of electric power limits for the energy storage device, said first set of electric power limits comprising a first minimum and a first maximum electric power limit, said second set of electric power limits comprising a second minimum and a second maximum electric power limit;

    determining a preferred input torque from a first power actuator based upon the first set of electric power limits;

    determining a first set of power constraints for constraining the input torque from the first power actuator to the transmission and determining a second set of power constraints for constraining output torque from the transmission to the output member based upon the second set of electric power limits; and

    controlling operation of the powertrain system responsive to the preferred input torque, the first set of power constraints, and the second set of power constraints.

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