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Method and apparatus for determining the center position of a steering system

  • US 6,089,344 A
  • Filed: 06/01/1998
  • Issued: 07/18/2000
  • Est. Priority Date: 06/01/1998
  • Status: Expired due to Term
First Claim
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1. A method for determining a current center position of a steering system installed in a vehicle, which comprises the steps of:

  • establishing a vehicle velocity and generating a vehicle velocity signal;

    estimating a steering assist force and generating a steering assist force signal;

    sensing an instantaneous steering position and generating an instantaneous steering position signal;

    determining a new center position of said vehicular steering system as a function of said instantaneous steering position signal when both said vehicle velocity signal exceeds a velocity threshold and said steering assist force signal is less than a force threshold;

    incrementing a loop counter each time said determining step is performed until said loop counter exceeds a loop counter threshold; and

    updating the current center position with the new center position when said loop counter exceeds said loop counter threshold.

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