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Method for determining absolute steering wheel angle from a single-turn steering wheel angle sensor

  • US 8,090,503 B2
  • Filed: 05/14/2008
  • Issued: 01/03/2012
  • Est. Priority Date: 05/14/2008
  • Status: Active Grant
First Claim
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1. A method of determining a steering wheel angle of a vehicle steering mechanism, upon key-on of a vehicle, using a single-turn steering wheel angle sensor, the method comprising the steps of:

  • sensing a steering wheel angle from the single-turn steering wheel angle sensor;

    storing plausible absolute steering wheel angle positions formed from the sensed steering wheel angle;

    sensing an output from a selected vehicle sensor that is input to a control system on the vehicle;

    calculating an expected output of the selected vehicle sensor for the plausible steering wheel angle positions; and

    outputting a single absolute steering wheel angle from the plausible steering wheel angle positions based on a comparison of the sensed output for the selected vehicle sensor for the sensed steering wheel angle against the calculated expected output of the vehicle sensor for a plausible absolute steering wheel angle position.

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