Michelin Recherche Et Technique S.a.

Compagnie Generale Des Etablissements Michelin

Michelin Rechlin Et Techerche S.a.

Francois-Jacques Cordonnier

Alain Domingo

Henri Barguet

Frédéric Domprobst

Le Tu Anh Vo

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 ().

Method for managing a powertrain of a motor vehicle

A multi-layer cable having an unsaturated outer layer, usable as a reinforcing element for a crown reinforcement of a tire, comprising a core of diameter dsurrounded by an intermediate layer (C) of six or seven wires (N=6 or 7) of diameter dwound together in a helix at a pitch p, this layer Citself being surrounded by an outer layer (C) of P wires of diameter dwound together in a helix at a pitch p, P being less by 1 to 3 than the maximum number Pof wires which can be wound in one layer about the layer C, this cable having the following characteristics (d, d, d, pand pin mm):

Multi-layer steel cable for tire crown reinforcement

A multi-layer cable having an unsaturated outer layer, usable as a reinforcing element for a tire carcass reinforcement, comprising a core of diameter dsurrounded by an intermediate layer (C) of four or five wires (M=4 or 5) of diameter dwound together in a helix at a pitch p, this layer Citself being surrounded by an outer layer (C) of N wires of diameter dwound together in a helix at a pitch p, N being less by 1 to 3 than the maximum number Nof wires which can be wound in one layer about the layer Cthis cable having the following characteristics (d, d, d, pand pin mm):0.08&#x3c;&#x3c;0.28;&#x2003;&#x2003;(i)0.15&#x3c;&#x3c;0.28;&#x2003;&#x2003;(ii)0.12&#x3c;&#x3c;0.25;&#x2003;&#x2003;(iii)for=4: 0.40 &#x3c;()&#x3c;0.80;&#x2003;&#x2003;(iv)for=5: 0.70&#x3c;()&#x3c;1.10;4.8&#x3c0;()&#x3c;&#x3c;5.6&#x3c0;(2);&#x2003;&#x2003;(v)the wires of layers Cand Care wound in the same direction of twist.&#x2003;&#x2003;(vi) The invention furthermore relates to the articles or semi-finished products made of plastics material and/or rubber which are reinforced by such a multi-layer cable, in particular to tires intended for industrial vehicles, more particularly truck tires and their carcass reinforcement plies.

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Clermont-Ferrand, France

Francois-Jacques Cordonnier