METHOD FOR INDIRECTLY MONITORING TIRE PRESSURE AND TIRE PRESSURE MONITORING SYSTEM
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Abstract
A method for indirectly monitoring tire pressure or for detecting damage to a wheel suspension, wherein a pressure loss detection variable (DVE) is determined using an analysis of a vibratory behavior of a wheel of a motor vehicle, and a pressure loss in the tire of the wheel or damage to the wheel suspension is detected by comparing a momentarily determined pressure loss detection variable (DVEakt) to a learned pressure loss detection variable (DVEsoil), wherein at least two dimensional variables are determined from a wheel speed signal (w) of the wheel, each representing a dimension for the extent of a frequency or a frequency range in the vibratory behavior of the wheel, and that the pressure loss detection variable (DVE) is derived from the two dimensional variables (e1, e2, e3), particularly from a ratio of the two dimensional variables (e2/e3), and a tire pressure monitoring system.
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Citations
36 Claims
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1-15. -15. (canceled)
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16. A method for indirectly monitoring tire pressure or for detecting damage to a wheel suspension system, said method comprising the steps of:
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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), which each represent a 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). - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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Specification