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Tire wear compensated load estimation system and method

  • US 10,245,906 B2
  • Filed: 11/11/2014
  • Issued: 04/02/2019
  • Est. Priority Date: 11/11/2014
  • Status: Active Grant
First Claim
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1. A system of estimating a load bearing on a vehicle tire, comprising:

  • a vehicle tire having a tire cavity and supporting a load;

    an inflation pressure measuring sensor attached to the tire for measuring an inflation pressure level within the tire cavity;

    a contact patch length sensor attached to the tire for measuring the contact patch length of the tire rolling against a ground surface carrying a tire load;

    a tire rolling speed sensor mounted to the vehicle for measuring a rolling speed of the tire;

    a hub acceleration sensor for measuring a hub acceleration of a hub supporting the vehicle tire;

    a tire wear state estimation calculator for deriving an estimated depth of a tread of the tire based on the hub acceleration;

    a compensation factor based upon the estimated depth of the tread; and

    a tire load calculator for estimating a tire load from the contact patch length, the compensation factor, the inflation pressure level, and the tire rolling speed.

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