Michelin Recherche Et Technique S.a.

Societe Detechnologie Michelin

Compagnie Generale Des Etablissements Michelin

Psa Automobiles Sa

David Bertrand

George Phillips O'Brien

Jay Clifford Sinnett

John David Adamson

Hichem Rehab

Pierrick Travert

Charles Salvi

Frédéric Spetler

Lionel Meyer

Olivier Collonge

A patch configured to fix an electronic system, which includes a sensor, to a tire. The patch has a foot with a surface configured to be fixed to the tire. The foot has at least two portions connected to one another by at least one bridging element. The bridging element has, in a section which is parallel to the surface of the foot that is configured to be fixed to the tire, a surface area which is smaller than the overall surface area in the same section between the connected portions of the foot. In the same section, the bridging element continuously connects the connected portions of the foot.

Patch for fixing an electronic system to a tire

A method of timing a remarkable angular position (&#x3b8;) of at least one sensor () carried by a tire () rotating relative to an external frame of reference. The following steps are performed: forming, from an output signal from the sensor (), a reference signal suitable for presenting a remarkable extremum during one revolution of the tire (); determining the time of an origin angular position (&#x3b8;) of the sensor as being the time of the remarkable extremum of the reference signal; and determining the time of the remarkable angular position (&#x3b8;) relative to the time of the origin angular position.

Method of timing a remarkable angular position of a sensor carried by a tire

Disclosed is a methodology for deriving data related to various selected tire () conditions. One or more sensors are analyzed in a manner similar to that of analyzing an electro-cardiogram taken from a human patient in order to determine selected operational characteristics of the monitored tires (). Analysis of the signal waveforms may involve analysis of a single waveform and/or comparison of paired waveforms originating for sensors associated with a single tire or paired tires ().

Flex signature for tire condition

A method of quantifying the utilization of a maximum grip potential of a tire running on the ground. At two distinct azimuth angles, at least two respective values are determined for a differential extension of the tread of the tire or for a shear of the tread that is homogeneous with said differential extension. The utilization is quantified with the help of a function of the two determined values.

Method of quantifying the utilization of a maximum grip potential of a tire

A method of determining a maximum adhesion coefficient of a tire while running on ground, the method comprising the following steps: determining the maximum adhesion coefficient as being an output from a main transfer function that is independent of at least one slowly-varying parameter; and determining at least one input of the main transfer function as being an output from a transfer pre-function that depends on said slowly-varying parameter.

Method of determining a maximum adhesion coefficient of a tire

According to the method, the risk is estimated as a function of a maximum grip potential &#x3bc;of the tire, a utilization percentage Prepresentative of the fraction of the maximum grip potential of the tire that is being used, and a magnitude Passociated with a risk of the tire hydroplaning, in particular a loss of tire area.

Method of estimating a risk of a lack of connecting with the ground for a motor vehicle

A method of determining a friction coefficient &#x3bc; in a contact area of a tire on a road. Fixed points are selected that lie at different azimuths along a circumference of at least one bead of the tire. A shear stress value is measured at each of the fixed points while the tire is rolling on the road. The measured shear stress values are processed to determine the friction coefficient &#x3bc;.

Measurement of the maximum adhesion coefficient by measuring stress in a bead of a tire

A method of determining at least one characteristic of a tire selected from the three components of a resultant of forces which are exerted by the road on the contact area of a tire and the self-alignment torque generated by the tire, includes the steps of making at least two measurements of circumferential extension or contraction in at least one sidewall of the tire at two fixed points in space, which are situated at different azimuths along the circumference, and based on the measurements deriving a value for the selected characteristic.

Method of determining components of forces exerted on a tire and determining the self-alignment torque

A method of determining the grip coefficient &#x3bc; in the contact area of a tire on a road includes the steps of selecting a plurality of fixed points in space (that is to say ones that are fixed in the reference frame associated with the vehicle) which points lie at different azimuths along the circumference in at least one sidewall of the tire, obtaining a corresponding number of measurements of circumferential distance variation (extension or contraction) at these fixed points when the tire is rolling on the road, and the measurement signals are processed so as to extract the grip coefficient &#x3bc;.

Direct determination of the maximum grip coefficient on the basis of measurement of the circumferential extension in a sidewall of a tire

A method for estimation of the maximum grip coefficient on the basis of knowledge of the forces and the self-alignment torque which are generated in the contact area of a tire, includes the steps of:

Estimating maximum friction coefficient based on knowledge of the loads and self-alignment torque generated in a tire contact zone

Method of determining at least one of the characteristics selected from: the three components of a resultant of forces which are exerted by the road on the contact area of a tire and the self-alignment torque generated by the tire, in which the said characteristic is derived from at least one measurement of the shear stresses at two fixed points in space, which are each situated in one of the beads.

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Besançon, France

David Bertrand