TYRE FOR HEAVY VEHICLES

摘要

The invention concerns a tyre with radial carcass reinforcement comprising a crown reinforcement consisting of at least two working crown plies of inextensible reinforcing elements, crossed from one ply to the next forming with the circumferential direction angles ranging between 10° and 45°, itself radially capped with a running tread, said running tread being assembled to two beads via two sidewalls and at least two working plies with different axial widths. The invention is characterized in that at least one first extruded section P of rubber mixture separates one working ply of least one end from one end of a second axially narrower layer, said extruded section P being radially separated at least partly from a liner C of said axially narrower working ply by a second extruded section of rubber mixture G, said first and second extruded sections of rubber mixture P and G and said liner C having respectively secant moduli of elasticity under tension at 10 % elongation MP, MG, MC such that MC > MG and MG > MP, said tyre further comprising in each shoulder at least one layer of reinforcing elements, mutually parallel and oriented substantially perpendicular relative to the reinforcing elements of the working ply radially adjacent said additional layer, and the axially inner end of said additional layer being radially adjacent the edge of at least one working crown ply.