Compagnie Generale Des Etablissements Michelin

Michelin Recherche Et Technique S.a.

Vincent Lemineur

Olivier Spinnler

Franck Nugier

Davy Vernier

Loïc Serra

A method, for evaluating the variation in the dynamic load borne by a tire comprising a front axle and a rear axle, comprises steps during which: the pressure of the air contained inside the tire is measured, a difference in load borne by the tire is determined as a function of the transfer of the total load of the vehicle between axles and of the position of the tire on the vehicle and, using a tire model that is preestablished, a pressure differential is determined, a corrected pressure value is determined, on the basis of the corrected pressure values, a reference pressure is determined, and the difference between the measured pressure in the reference pressure is calculated, and the variation in dynamic load borne by the tire is determined on the basis of the model of the tire.

Method for evaluating the dynamic load supported by a tire by measuring pressure and longitudinal acceleration

Tire

The invention relates to a method for estimating the dynamic load borne by a tire of a vehicle running along over a given period, whereby the pressure is measured during the period, at each pressure measurement point, the pressure, known as the reference pressure, of the same tire subjected to a load that is constant and known per time interval is determined, and the variation in load is calculated from the difference between the measured pressure and the pressure, known as the reference pressure, and from a model of the tire devised beforehand and that relates a variation in load to a variation in pressure. The invention also proposes a method for estimating the load borne by a tire.

Method for estimating the dynamic load borne by a vehicle tire

A support device connects a wheel to suspension elements of a vehicle, the wheel having a radius R'. The support device includes rods articulated at their lower ends to the suspension elements and at their upper ends to the wheel carrier so as to confer on the wheel a degree of camber freedom relative to the suspension elements. The camber movement takes place around an instantaneous center of rotation. The device is also configured in such manner that Y and Z are respectively the abscissa and ordinate of the instantaneous position of the instantaneous center of rotation in the camber plane, wherein such position, during a camber deflection from 0&#xb0; to 1&#xb0;, satisfies the following conditions:&#x2266;0.125*&#x2266;&#x2212;0.0625&#x2266;0.66225*+0.02028*

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Clemont-Ferrand, France

Vincent Lemineur