Method and apparatus for GPS based slope determination, real-time vehicle mass determination, and vehicle efficiency analysis

  • US 9,384,111 B2
  • Filed: 12/18/2012
  • Issued: 07/05/2016
  • Est. Priority Date: 12/23/2011
  • Status: Active Grant
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First Claim
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1. A method of evaluating driver performance, comprising the steps of:

  • (a) while the driver is operating a vehicle, automatically collecting vehicle data, the vehicle data including vehicle position data, vehicle speed data, torque data and engine speed data;

    (b) using a first computing device to derive the road surface slope metric using changes in horizontal and elevation vehicle position data over time;

    (c) using a second computing device to evaluate driver performance using a plurality of factors, at least one of which is derived from the road surface slope metric; and

    (d) using a third computing device to determine a mass of the vehicle at a specific point in time, based on the road surface slope metric corresponding to that point in time.

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