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Tire pressure loss detection

  • US 6,993,449 B2
  • Filed: 01/31/2004
  • Issued: 01/31/2006
  • Est. Priority Date: 01/31/2004
  • Status: Active Grant
First Claim
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1. A method of detecting the tire pressure loss in a vehicle, comprising:

  • detecting torsional vibrations of one or more wheels of the vehicle to produce an angular frequency spectrum in an angular frequency domain;

    eliminating pole pitch errors in the angular frequency spectrum;

    mapping a peak frequency from the angular frequency spectrum in the angular frequency domain to a time frequency domain;

    determining if the peak frequency in the time frequency domain changes over time;

    relating frequency changes to pressure loss in one or more tires associated with the one or more wheels; and

    indicating the pressure loss to the driver of the vehicle.

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