Method and apparatus for 3-D accelerometer based slope determination, real-time vehicle mass determination, and vehicle efficiency analysis

  • US 9,489,280 B2
  • Filed: 12/21/2012
  • Issued: 11/08/2016
  • Est. Priority Date: 12/23/2011
  • Status: Active Grant
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First Claim
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1. A system for producing a performance metric indicative of a performance of a driver using at least in part slope data derived from vehicle position data, comprising:

  • (a) at least one vehicle data acquisition component disposed at a vehicle, the at least one vehicle data acquisition component being configured to collect time indexed vehicle data, the time indexed vehicle data comprising;

    (i) 3-D accelerometer data;

    (ii) speed data;

    (iii) torque data;

    (b) at least one processor, remote from the vehicle, the at least one processor being configured to implement the functions of;

    (i) determining a slope the vehicle is traveling over a specific point in time based on the 3-D accelerometer data;

    (ii) determining a mass of the vehicle at a specific point in time, based on the slope the vehicle is traveling over at that point in time, the speed data at the point in time, the torque data at that point in time, and the engine speed at that point in time;

    (iii) producing the performance metric of the driver'"'"'s operation of the vehicle based at least in part on the mass of the vehicle, the mass having been determined using slope data derived from vehicle position data;

    (c) a wireless data link in the vehicle to convey the vehicle data to the at least one processor remote from the vehicle; and

    (d) wherein the processor is further configured to provide a vehicle mass output that is used by at least one vehicle controller to control operation of the vehicle.

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