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HYBRID ELECTRIC VEHICLE CONTROLLER AND METHOD OF CONTROLLING A HYBRID ELECTRIC VEHICLE

  • US 20140012450A1
  • Filed: 12/23/2011
  • Published: 01/09/2014
  • Est. Priority Date: 12/23/2010
  • Status: Active Grant
First Claim
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1. A controller for a hybrid electric vehicle (HEV) having an engine and an electric machine, the controller being configured upon start-up to control the electric machine to provide torque to drive the vehicle with the engine off if a state of charge (SoC) of an energy storage device is above an EV-start SoC threshold and to start the engine if the SoC of the energy storage device is below the EV-start SoC threshold, wherein the EV-start SoC threshold comprises at least one of:

  • a value sufficient to allow the vehicle to travel a prescribed distance before the SoC falls below a SoC minimum level at which the engine is started; and

    a value sufficient to allow the vehicle to operate for a prescribed time period before the SoC falls below the SoC minimum level.

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