optimized tire architecture of the truck, agricultural or civil engineering type

摘要

The invention is a radial tire (1), for a heavy vehicle, in which on either side of the equatorial plane, a radially outer hooping layer (323) with working layers, hyperelastic, covers the axial end of the tire. working layer of smaller axial width (322) and whose axial ends are at a minimum axial distance (Ds / 2) from said end, contains hyperelastic cables (50). These said cables include wire elements (54) on a single layer (52). The distance between the center of each metallic wire element (54) of the layer (52) and the main axis (A) of the cable is equal to half of the helix diameter Dh and is substantially constant and equal for all the elements metallic wires (54) of the layer (52), the metallic wire elements (54) defining an internal arch (58) of the cable of diameter Dv. Each metallic wire element (54) has a diameter Df and a radius of curvature of the helix Rf such that: 9 ≤ Rf / Df ≤ 30, and 1.30 ≤ Dv / Df ≤ 4.5. said hyperelastic cables being embedded in a rubbery compound. Abstract figure: Figure 1