摘要:
The invention relates to a tyre for a private passenger vehicle comprising a tread extended on either side by flanks, that tread being provided with an asymmetrical sculpted design relative to a median plane dividing that tread into two parts with a same axial width, that axial width being measured in a direction parallel to the axis of rotation, an outer part and an inner part, that outer part being situated between that median plane and the flank designed to be placed on the outside of a vehicle and the inner part being situated between the same plane and the flank designed to be placed toward the inside of the same vehicle, the inner part and the outer part each comprising at least one hollow forming a slot or designed to form a slot from a partial wearing-off of the tread, those hollows defining, in new condition and for each part (inner and outer), a total hollow volume, ViO and VeO, respectively, a hollow surface rate, TiO and TeO, respectively, those rates being different from zero and such that in new condition, there is a ratio RO between the hollow volume of the inner part and the hollow volume of the outer part, and in each worn condition (U) chosen between the initial state and the wear limit of the tread, there is a ratio RU between the hollow volume of the inner part and the hollow volume of the outer part, said tyre being characterised in that, at least from 80% wear measured on the tread thickness to be worn off, the ratio RU is greater than the ratio RO.
摘要:
Tyre tread (1) comprising at least one sipe (5) in a main direction D and of average width E, this sipe (5) comprising at least one part (5F) of shallow depth HF and at least one part (5G) of great depth HG, each sipe part (5G) and (5F) comprising an end region; the tread further comprising at least one insert (4) oriented in a different direction to the main direction D of the sipe and arranged entirely within the thickness of the tread so as to lie radially on the inside of a shallow-depth sipe part (5F); this tread being such that at least the sipe part (5F) of shallow depth HF is provided, at its end region, with a widening that forms a canal (6) of a maximum width W greater than the mean width E of the sipe.
摘要:
The invention relates to an adapter for a rolling assembly having an axis of rotation comprising a tyre having two beads, a rim having a well (13) positioned between two rim seats (12) each having an axially outer end, said rim having a total width W between each axially outer end of said two rim seats, said adapter making the connection between each bead and each rim seat, said adapter having two axially outer ends (2) each comprising an adapter seat (3) and an adapter bearing face (4) substantially comprised in a plane perpendicular to the axis of rotation, a body (5) connecting said two axially outer ends (2) so as to form a one-piece component and comprising at least one main reinforcement, a face (16) intended to be in contact with each rim seat (12) and with the well (13) and arranged radially on the inside said adapter having a total axial width L comprised between each adapter seat (3). The invention is characterized in that the ratio W/L is greater than or equal to 20 and less than or equal to 60% and in that said body comprises an immobilizing element (8) intended to immobilize said adapter in the well (13).
摘要:
The invention relates to an adapter for a rolling assembly having an axis of rotation and comprising a tyre having two beads, a rim, said adapter providing the connection between one of the rib beads and the rim, said rim having two rim seats (7), said adapter having an axially internal end (10) intended to be mounted on the seat of the rim and comprising an internal reinforcing element (16), an axially external end (9) intended to be mounted on the seat of the rim and comprising an external reinforcing element (15), a body (11) connecting said external end to said internal end in such a way as to form a single unit and comprising at least one main reinforcement providing the connection between said external reinforcement and said internal reinforcement, a substantially cylindrical adapter seat (18) intended to accept one of said beads, an adapter bearing face (21) substantially comprised in a plane perpendicular to the axis of rotation. The adapter is characterized in that the reinforcement of the axially external end is entirely outside the bearing face, and in that the body comprises, facing the adapter seat, a seat annular reinforcement that has a compression modulus of 1 GPa or more.
摘要:
The invention relates to a running assembly comprising a tyre (10) comprising two beads (20); a mounting rim (500) the width of which is greater than or equal to 55% and less than or equal to 80% of the maximum axial width of the tyre inflated to its service pressure; and at least one adapter (100) which makes the connection between the mounting rim and a bead of the tyre.
摘要:
The invention relates to the reinforcing ply of a passenger vehicle tyre. The invention aims to provide good resistance to penetration and perforation of the tyre summit by foreign objects, having a simple and lightweight reinforcing architecture. According to the invention, the hooping layer (71) has a breaking strength per mm of axial width of the hooping layer FR equal to at least 35 daN/mm and has a secant modulus of extension MA equal to at least 250 daN/mm, for an applied force F equal to 15% of the braking strength FR of said hooping layer (71). The working ply (6) comprises a single working layer (61), the working reinforcements of which form an angle A T of at least 30° and at most 50° with respect to the circumferential direction (ΥΥ'). The carcass reinforcements of the at least one carcass layer (81) form an angle A c2 equal to at least 55° and equal to at most 80° with respect to the circumferential direction (ΥΥ') and in the equatorial plane (XZ), and have an orientation opposite to that of the angle A T of the working reinforcements, in such a way that the carcass reinforcements and the working reinforcements constitute a triangulation.