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Method and system for more efficient operation of plug-in electric vehicles

  • US 9,428,076 B2
  • Filed: 10/06/2014
  • Issued: 08/30/2016
  • Est. Priority Date: 02/03/2010
  • Status: Active Grant
First Claim
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1. A method for operating an automobile having an energy storage unit with a state of charge and an energy conversion unit for powering the automobile, the method comprising:

  • configuring the automobile to operate in a charge depletion mode that decreases the state of charge of the energy storage unit due to energy being provided by the energy storage unit to power the automobile;

    configuring the automobile to operate in a charge sustaining mode that maintains the state of charge of the energy storage unit within a first charging range by powering the automobile using energy from the energy conversion unit; and

    configuring the automobile to operate in an extended charging mode that asynchronously increases the state of charge of the energy storage unit using energy from the energy conversion unit to charge the energy storage unit and decreases the state of charge of the energy storage unit to power the automobile to maintain the state of charge of the energy storage unit within a second charging range that is greater than the first charging range.

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