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Determining weight of electric and hybrid vehicles

  • US 10,071,742 B2
  • Filed: 01/09/2017
  • Issued: 09/11/2018
  • Est. Priority Date: 01/09/2017
  • Status: Active Grant
First Claim
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1. A method comprising:

  • providing an at least partially electric vehicle comprising one or more electric motors and sensors sensing motor performance characteristics;

    providing drive force based on electric motor current, voltage and speed;

    providing predetermined calibration settings relating electric motor drive force to motor speed for the at least partially electric vehicle traveling at various speeds;

    providing vehicle pitch measurements, roll measurements or a combination thereof,determining filtered data based on the combination of pitch and roll measurements;

    providing accelerometer data to determine vehicle velocity, acceleration, and direction of travel;

    altering the accelerometer data based on the filtered data;

    determining by use of one or more processors of a machine, that one or more of a vehicle performance parameters fall within threshold ranges;

    wherein the vehicle performance parameters comprise the motor performance characteristics, the drive force, and the accelerometer data;

    storing, in response to the vehicle performance parameters being within the threshold ranges, a plurality of data pairs, each data pair comprising a longitudinal acceleration and the drive force, the drive force determined according to a calibrated polynomial for a current velocity of the at least partially electric vehicle;

    determining a slope of a line that linearly approximates the plurality of data pairs, the slope indicating a total weight, the total weight consisting of a weight of the at least partially electric vehicle and a weight being hauled by the at least partially electric vehicle; and

    transmitting the total weight to a display.

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