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Apparatus and method for determining axial stability

  • US 5,969,246 A
  • Filed: 11/05/1997
  • Issued: 10/19/1999
  • Est. Priority Date: 10/10/1995
  • Status: Expired due to Term
First Claim
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1. A method for determining an axial stability of a wheel of a motor vehicle, comprising the steps of:

  • measuring attitude and location of a wheel with the wheel set in a first position to determine a first vector having a predetermined relation to said wheel;

    rolling said wheel back a number of degrees to a second position and measuring attitude and location thereof to determine a second vector also having said predetermined relation to said wheel;

    determining rearward axis parameters including a rearward rotational axis vector and a rearward runout vector based on said first and second vectors;

    rolling said wheel forward to a third position which is substantially equal to said first position and measuring the attitude and location of said wheel to determine a third vector also having said predetermined relation to said wheel;

    determining forward axis parameters, including a forward rotational axis vector and a forward runout vector, based on said second and third vectors; and

    determining dynamic stability vectors including a rotational axis stability vector and a runout stability vector based on said forward and rearward axis parameters.

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