Patent ID: 7437922
Filing Date: 2008-10-21
Classification: B60C

Abstract:
1. Method for monitoring the operational condition of a tire ( 1 ) equipping a vehicle, this method including at least the steps consisting in producing, over time, representative samples (G(n)) of successive values assumed by a changing physical quantity (G), under conditions otherwise equal, with respect to the number of moles (N) of gaseous fluid present in this tire ( 1 ), deducing from these samples an estimated condition of the tire ( 1 ), comparing said estimated condition to a range of normal driving conditions, and producing an alarm in the case where the estimated condition of the tire ( 1 ) is situated outside the range of these normal conditions, characterized in that the step of deducing from the samples includes at least one operation consisting in comparing an indicator of dispersion of said physical quantity (G) to a predetermined threshold value (L), wherein physical quantity (G) used consists of the ratio (T/P) of the temperature (T) of the gaseous fluid to its pressure (P), and the alarm indicates a leak in the tire ( 1 ), at least in a case where, at the same time, this physical quantity (G) increases while its variance (S 2 1 (G)) exceeds the predetermined threshold value (L).