Procedure, device and recording medium in which a program is recorded to determine the residual time bearing and the end of life of a tire deflation continues to move in deflated state.

摘要

A process for judging a residual lifetime of a tire (2) during continuous running on a flat state in a vehicle equipped with a system of flat tires comprising tires and a detection units (4) each of which it is disposed within the respective tire and capable of measuring a given temperature of the tire, wherein when at least one tire from flat tires is continuously run at the flat state by an abnormal lowering of an internal pressure accompanied with the appearance of a stick or similar event, the given temperature of the tire rolling continuously in the deflated state, and a residual life of the tire is evaluated based on the measured given temperature is measured in the lifetime residual is assessed by time and / or distance recorribles calculated on the basis of as given temperature until the problem of tire appears, in which the given temperature of the tire is an atmosphere temperature inside tire, wherein after the previous setting of a limit temperature TL that is statistically corresponds with the appearance of problem when at least one tire between inflated tires is continuously run at the deflated by an extreme lowering of the internal pressure accompanied with the occurrence of puncture or similar event, the atmosphere temperature inside tire is measured in the flat tire during continuous running at the flat state, and calculates a time predicted to reach to the limit temperature by using the measured values ​​of the atmosphere temperature inside tire and data calculated from these values ​​measured values of tempera existing atmospheric ture inside the tire, and the running time and / or distance calculated bearing is determined in a time and / or recorribles distance until the occurrence of trouble in the tire, wherein after it previously determined a ratio of an atmosphere temperature inside tire T to be measured with respect to a time of continuous running t as a function f (t) under various run-flat running where the tire is continuously run in the current flat running condition from a time point of measuring the atmosphere temperature inside tire, they are calculated the running time and / or running distance provided to reach the limit temperature by using the function f (t), and wherein the function f (t) is approximately expressed by f (t) = T0 - Aexp (-Bt) wherein T0 is a temperature expected reach saturation and A and B are coefficients, and when the tire is continuously run at the present flat running condition from a point in time of measurement the atmosphere temperature inside tire, the running time and / or the running distance provided to reach the limit temperature are calculated by using the function f (t).