| 摘要 |
<p>The invention concerns a tyre for a heavy vehicle, comprising at least a casing reinforcement (1), whereon is mounted radially external a crown reinforcement (3) consisting of at least three plies (31, 32, 33) called working plies and formed with inextensible wire cords, crisscrossed from one ply (31, 32) to the next (32, 33) forming with the circumferential direction angles alpha , alpha 1, alpha 2 ranging between 15 DEG and 35 DEG . At least a half-ply (34) consisting of inextensible wire cords and having a length L', is, on either side of the equatorial plane XX', arranged between the edges of at least two radially adjacent working plies (31, 32; 32, 33), the cords of said half-ply (34) forming with the circumferential direction an angle beta greater in absolute value than 25 DEG and greater in absolute value than the widest angle formed by the elements of the two working plies by a quantity ranging between 5 DEG and 15 DEG .</p> |
