Compagnie Generale Des Etablissements Michelin

Michelin Recherche Et Technique S.a.

Bertrand Boisdon

Pierre-Alexis Tetaz

Frédéric Pialot

Bernard Guerinon

Eric Berger

Marie-Helene Vantal

Thomas Fabre

Melaine Guillou

Christine Nourry

Jerome Labrousse

A tire comprises a tread provided with two edges (A,B) and with a center (C) dividing it into two parts of equal width with sets of blocks (A,B). Each set of blocks (A,B) comprises three zones: at the edge (), at the center () and intermediate (). Each set of blocks (A,B) comprises a set of chamfers (A,B,C) which extends over at least the edge zone () and the central zone () of the set of blocks (A,B). The width LCof the set of chamfers (A,B,C) over the edge zone () is different from the width LCof the set of chamfers (A,B,C) over the intermediate zone (), the widths LCand LCbeing comprised between 0.5 mm and 2.5 mm.

Tire comprising a tread

The reinforcing structure for a tire is in the form of a stratified assembly formed of two layers of reinforcing strips of completely connected cross section, and flattened in shape. According to the method, the strips of each layer are laid side by side in a main direction of laying. The strips of the first layer are spaced apart by a distance that is less than the width of the strips of the second layer and in such a way that the edges of the strips of the first layer overlap the edges of the strips of the second layer. The two layers of strips are separated by a layer of uncoupling rubber.

Method for producing a reinforcement structure for a tire

Tire tread

Tire tread having a central part (I) made from at least one first rubber compound and having at least one circumferential rib (-) formed of a plurality of blocks () separated by sipes; a first and a second lateral part (II and III) made of at least a second and third rubber compound, and having a circumferential rib () formed by a plurality of blocks (), separated by sipes, wherein the at least one second and third rubber compounds have a value of tan &#x3b4; at 23&#xb0; C.&#x2014;at a frequency of 10 Hz and an elongation of 10% &#x2014;of less than 0.25, wherein the complex modulus G*(T) of the at least one first rubber compound is greater than the complex moduli G*(T) of at least one second and third rubber compounds for all temperatures T greater than or equal to 0&#xb0; and less than or equal to 60&#xb0; C.

Tire having low rolling resistance

Growing community of inventors

Clermont-Ferrand, France

Bertrand Boisdon