Compagnie Generale Des Etablissements Michelin

Frédéric Domprobst

Arnaud Larregain

Thomas Ledoux

Francois-Jacques Cordonnier

Denis Lhospitalier

Etienne Collet

Vincent Arvis

Nicolas Fangeat

Paul Lacoste

Vincent Pilon

Julien Montagner

A tread for a heavy goods vehicle tire, the tread having a surface when new suitable for coming into contact with a road surface, this tread having a plurality of optimized incisions opening onto its tread surface when new, each incision made of at least two narrow portions and wide portions, each narrow portion surrounded by wide portions, the sum of the areas of narrow portions representing at least 40% of the total surface of the incision (and the width being less than 0.4 mm, each portion having a width at least equal to 0.4 mm, this tread being such that for each optimized incision each of the wide portions extending between two narrow portions includes at least one section inclined in a plane parallel to the mid-plane of the optimized incision, and forming an angle at least 15 degrees with the direction of the tread thickness.

Tire tread for a heavy goods vehicle tire having improved incisions

Tread for heavy-duty vehicle tire, having tread surface with at least one cavity forming a hidden channel which forms an additional groove after an amount of wear, each channel extended towards tread surface in the new state along its entire length by a sipe of small width, at least one channel having plurality of extensions from this channel towards tread surface to place the channel and the outside of the tread into communication from an amount of partial wear of the tread, each extension being a secondary channel having a first opening of elongate shape with a minimum dimension I0 and a maximum dimension Lo that opens onto tread surface and a second opening that opens into channel, wherein for at least one channel provided with extensions, each first opening of these extensions is formed by a side of the sipe that extends the channel.

Tread having hidden cavities extended by offset openings

Tread () for a tire of a heavy-duty vehicle, having a tread surface (), this tread () comprising, near to each of its edges (), a plurality of open wells () on the tread surface when new, these open wells () of depth Pmax being arranged circumferentially with a mean distance D between two consecutive open wells; each open well () being delimited by two main faces () facing one another, this tread being such that each open well () is connected to at least one hidden cavity () formed within the tread, this hidden cavity () opening into a main face () of said well.

Tread comprising interrupted grooves

Tire

A method for detecting a thermal anomaly during running of a tire-wheel assembly () of a vehicle () equipped with a mounting wheel () on which a pneumatic tire is mounted comprises the steps of measuring the internal pressure (P) and temperature (T) of the tire-wheel assembly () using a sensor () attached to the mounting wheel (), calculating a monitoring ratio which is a function of the measured pressure and of the measured temperature, repeating the preceding steps and tracking the evolution in the value of the monitoring ratio in order to determine a thermal anomaly.

Methods for detecting and locating a thermal anomaly for a mounted assembly of a vehicle

The method for organizing a group of several separate vehicles in a platoon includes an identification step (a) in order to identify the candidate vehicles that are to form the platoonp The method also includes an acquisition step (b) in order to acquire, for each candidate vehicle, at least one parameter associated with a tire of the candidate vehicle, such as the wet grip index of the tire tyre, referred to as the 'tire parameter'. Subsequently, based on the tire parameter, a processing step (c) for determining the rank attributed to the particular candidate vehicle in the platoon and/or the inter-vehicle distance which, at a given speed, must separate the candidate vehicle in question from the vehicle immediately in front in the platoon.

Method for managing a platoon of trucks on the basis of information relating to the tires with which the trucks of said platoon are equipped

A method for managing a powertrain () of a motor vehicle () comprises the following steps: (a) determining a predictive rolling resistance coefficient (Crr) for at least one tyre () of the motor vehicle (); and (b) adapting the operation of the powertrain () according to the predictive rolling resistance coefficient (Crr) in order notably to optimize the energy consumption of the motor vehicle ().

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Clermont-Ferrand, France

Frédéric Domprobst