| 摘要 |
Crown of a radial tire for a heavy civil engineering vehicle comprises a tread, a crown reinforcement radially inside of the tread, and a carcass reinforcement radially inside of the crown reinforcement. The crown reinforcement comprises, radially from the outside towards the inside, a protective reinforcement comprising two protective layers comprising elastic metal reinforcers which are parallel to one another within each layer and crossed from one layer to the next, forming respective angles A1 and A2 with the circumferential direction and a working reinforcement comprising two working layers comprising inelastic metal reinforcers, parallel to one another within each layer and crossed from one layer to the next, forming respective angles B1 and B2 with the circumferential direction. Angle B1 is at least equal to 50° and strictly less than 90° and angle B2 is non-zero and at most equal to 12°. |
| 主权项 |
1. A tire for a heavy vehicle of the civil engineering type, comprising:
a tread, a crown reinforcement radially on the inside of the tread, and a carcass reinforcement radially on the inside of the crown reinforcement, the crown reinforcement comprising, radially from the outside towards the inside,
a protective reinforcement comprising a first protective layer and a second protective layer (52), radially on the outside of and adjacent to the first protective layer, the first and second protective layers comprising elastic metal reinforcers which are parallel to one another within each layer and crossed from one layer to the next, forming respective angles A1 and A2 with the circumferential direction, anda working reinforcement comprising a first working layer and a second working layer, radially on the outside of and adjacent to the first working layer, the first and second working layers comprising inelastic metal reinforcers, parallel to one another within each layer and crossed from one layer to the next, forming respective angles B1 and B2 with the circumferential direction, wherein the angle B1, formed with the circumferential direction by the metal reinforcers of the first working layer, is at least equal to 50° and strictly less than 90° and wherein the angle B2, formed with the circumferential direction by the metal reinforcers of the second working layer is non-zero and at most equal to 12°. |
