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Methods and Systems for Regulating Hill Descent Speed of an Electric Vehicle

  • US 20090227418A1
  • Filed: 03/06/2008
  • Published: 09/10/2009
  • Est. Priority Date: 03/06/2008
  • Status: Active Grant
First Claim
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1. A method for regulating the hill descent speed of an electric vehicle, the method comprising:

  • determining if a freewheel condition exists;

    determining if a motor speed is greater than a threshold value;

    determining a change in the motor speed when a freewheel condition exists and the motor speed is greater than a threshold value; and

    adjusting a current braking assist based on the determined change in the motor speed such that the motor speed is maintained at or restored to a reference motor speed thereby regulating the speed of the electric vehicle.

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