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Method for controlling a functional system of a materials handling vehicle

  • US 9,981,836 B2
  • Filed: 01/28/2016
  • Issued: 05/29/2018
  • Est. Priority Date: 03/31/2015
  • Status: Active Grant
First Claim
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1. A method of estimating a period of time comprising:

  • periodically sensing a respective temperature of each of a plurality of components of an industrial vehicle while the vehicle is powered on;

    from among the most recently sensed respective temperatures, storing the maximum respective temperature;

    from among the most recently sensed respective temperatures, storing the minimum respective temperature;

    detecting that the industrial vehicle is powered on from a powered off condition;

    sensing a new respective temperature of each of the plurality of components;

    from among the new respective temperatures, determining a maximum new respective temperature;

    estimating, by a computer of the industrial vehicle, a period of time the industrial vehicle was in the powered off condition based on the stored maximum respective temperature and the maximum new respective temperature;

    storing, by the computer of the industrial vehicle, an array of stored current values for a functional system of the industrial vehicle;

    adjusting, by the computer of the industrial vehicle, respective current values based on the estimated period of time; and

    calculating, by the computer of the industrial vehicle, a monitored current value for the functional system of the industrial vehicle based on the adjusted current values.

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