×

Method and apparatus for estimating uneven tire wear

  • US 10,286,734 B2
  • Filed: 07/31/2014
  • Issued: 05/14/2019
  • Est. Priority Date: 11/26/2013
  • Status: Active Grant
First Claim
Patent Images

1. A method for estimating uneven tire wear from radial acceleration waveforms detected by an acceleration sensor, the method comprising:

  • (a) extracting, with a processor, an acceleration waveform in the radial direction of the tire in a post-trailing-end domain from output signals of the acceleration sensor disposed on an inner surface of a tire tread during vehicular travel;

    (b) calculating, with the processor, a measured vibration level α

    , which is a level of acceleration in a frequency band of 800 to 1200 Hz, from the extracted acceleration waveform;

    (c) calculating, with the processor, a reference vibration level β

    , which is a level of acceleration in a frequency band of 2000 to 2400 Hz, from the extracted acceleration waveform;

    (d) calculating, with the processor, an uneven wear determination index γ

    , which is an index for determining uneven tire wear, from the measured vibration level α and

    the reference vibration level β

    ; and

    (e) determining, with the processor, whether an uneven wear is occurring in an edge of a tire shoulder from a value of the calculated uneven wear determination index γ

    .

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×