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Method for indirectly monitoring tire pressure and tire pressure monitoring system

  • US 8,634,983 B2
  • Filed: 11/27/2008
  • Issued: 01/21/2014
  • Est. Priority Date: 12/10/2007
  • Status: Active Grant
First Claim
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1. A method for indirectly monitoring tire pressure or for detecting damage to a wheel suspension system, said method comprising the steps of:

  • determining a pressure loss detection variable (DVE) by an analysis of an oscillation behavior of a wheel of a motor vehicle,detecting a pressure loss at a tire of a wheel or damage to the wheel suspension system by comparing a currently determined pressure loss detection variable (DVEcur) with a learnt pressure loss detection variable (DVEsetp), wherein at least two dimensional variables (e1, e2, e3), representing a torsional and a vertical dimension for the value of a frequency (fnat1, fnat2, fnat3) or of a frequency range (flower, fupper, Δ

    fnati) in an oscillation behavior of the wheel, are determined from a wheel speed signal (w) of the wheel, andwherein the pressure loss detection variable (DVE) is formed from the two dimensional variables (e1, e2, e3).

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