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Vehicle calibration using data collected during normal operating conditions

  • US 9,115,663 B2
  • Filed: 06/20/2012
  • Issued: 08/25/2015
  • Est. Priority Date: 07/24/2009
  • Status: Expired due to Fees
First Claim
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1. A method of calibrating a vehicle, the vehicle including an engine, an engine control unit, a sensor that detects a value of an output parameter, and an actuator that controls the engine accordingly to a value of an input parameter, the method comprising:

  • receiving data from a vehicle communication interface module at a calibrating computer system, the vehicle communication interface module being selectively attachable to the vehicle and recording data received from the vehicle during normal operation of the vehicle, the data including a plurality of adjusted actuator values and a corresponding combination of engine speed and a value indicative of throttle position for each of the plurality of adjusted actuator values, each adjusted actuator value having been generated by the engine control unit;

    determining, by the calibrating computer system, a number of adjusted actuator values stored to the vehicle communication interface corresponding to a first combination of engine speed and the value indicative of throttle position;

    when the number of adjusted actuator values for the first combination is greater than a threshold, generating, by the calibrating computer system, an updated data table entry for the first combination based on the adjusted actuator values corresponding to the first combination; and

    transferring an updated data table, including the updated data table entry for the first combination, to the engine control unit after generating the updated data table.

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