METHOD FOR ESTIMATING THE DYNAMIC LOAD BORNE BY A VEHICLE TIRE

• US 20130125639A1
• Filed: 07/01/2011
• Published: 05/23/2013
• Est. Priority Date: 07/13/2010
• Status: Active Grant

• Current Assignee: Compagnie générale des établissements Michelin
• Original Assignee: Compagnie générale des établissements Michelin, Michelin Recherche et Technique SA (Compagnie Generale DES Etablissements Michelin SCA)
• Inventors: Lemineur, Vincent
• Granted Patent: US 8,887,561 B2
• Time in Patent Office: Days
• US Class Current: 73/146
• CPC Class Codes: B60C 23/04 mounted on the wheel or tyre
• CPC Class Codes: G01G 19/08 for incorporation in vehicles
• CPC Class Codes: G01M 17/02 Tyres

Abstract

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.

Claims

1. Method for estimating the dynamic load borne by a tire of a vehicle running along over a given period, wherein the pressure is measured during the period, wherein, 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 wherein, at each pressure measurement point, the variation in load is calculated from the difference between the measured pressure and the reference pressure and from a model of the tire devised beforehand and that relates a variation in load to a variation in pressure.

2. Method according to claim 1, wherein the reference pressure of the same tire subjected to a load that is constant per time interval is determined by adjusting a polynomial on the measured signal for each pressure measurement time interval.

3. Method according to claim 1, wherein the model of the tire is a system of graphs and/or a numerical model.

4. Method according to claim 1, wherein the model of the tire is determined on ground similar to that used for measurement.

5. Method according to claim 1, the vehicle for example being of the dumper type, wherein the measurement period comprises at least in succession an unladen time interval and a time interval of laden running.

6. Method according to claim 5, wherein the reference pressure of the same tire subjected to a load that is constant is determined by adjusting a polynomial on the measured signals for the pressure measurement periods when the vehicle is unladen, and by interpolating or extrapolating these signals for the periods of laden running.

7. Method for estimating the load borne by a tire of a vehicle running along over a given period, comprising at least successively an unladen time interval and a time interval of laden running, wherein the pressure is measured during the period, wherein, at each pressure measurement point of the unladen phases, the pressure, known as the reference pressure, of the same tire subjected to a constant load is determined, wherein a pressure, known as a reference pressure, is deduced at each pressure measurement point of the phases of laden running of the same tire subjected to a constant load and wherein, at each pressure measurement point, the load is calculated from the difference between the measured pressure and the reference pressure and from a model of the tire devised beforehand and that relates a variation in load to a variation in pressure.

8. Method according to claim 7, wherein the pressure, known as the reference pressure, at each pressure measurement point of the phases of laden running of the same tire subjected to a constant load is deduced by interpolating or extrapolating the determined signals of the pressure, known as the reference pressure, of the same tire subjected to a constant load in the phases of unladen running, flanking the phase of laden running.