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USE OF GRADIENT ROAD RESISTANCE STRATEGIES

  • US 20100256883A1
  • Filed: 04/03/2009
  • Published: 10/07/2010
  • Est. Priority Date: 04/03/2009
  • Status: Active Grant
First Claim
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1. A method of determining a shift point motor speed corresponding to a transmission gear ratio change of a vehicle on a grade, comprising:

  • determining a first shift point motor speed corresponding to a transmission gear ratio change for a vehicle on a level surface;

    determining a first offset value based on a traction resistance of the vehicle on a grade;

    determining a second offset value based on a change in the traction resistance of the vehicle;

    adjusting the first shift point motor speed by the first offset value to yield a second shift point motor speed; and

    adjusting the second shift point motor speed by the second offset value to yield an adjusted shift point motor speed corresponding to a transmission gear ratio change of the vehicle on the grade.

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