Tyre reinforcement

A technology for reinforcements and tires, applied in the field of reinforcements for passenger vehicle tires, can solve problems such as crown penetration, rupture, and mechanical fatigue of crown reinforcements, and achieve good penetration resistance

Active Publication Date: 2018-01-16
MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] In addition to foreign objects that puncture the crown of the tire and potentially cause the crown to become penetrated and rupture, repeated stress loads on the crown due to, for example, driving on pebble-covered ground have a hammering effect on the crown and may Causes mechanical fatigue in the crown reinforcement and its potential rupture

Method used

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  • Tyre reinforcement
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Examples

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Embodiment Construction

[0058] Establish image 3 The curves in are for nominal pressures intended to fit on 6.5J16 rims and inflated to 2.5 bar at "nominal load" and 2.9 bar at "extra load" according to ETRTO (European Tire and Rim Technical Organization) standards, dimensions Hooping ply for 205 / 55R 16 passenger vehicle tires. Curve S1 is the tensile curve of the hoop layer. The hoop reinforcement of the hoop layer is composed of three 440tex (440 / 3) PET bundles with a balance twist of 160 turns / meter (160tpm). The spacing of the reinforcements is P is equal to 1.31mm. Curve S2 is the tensile curve of the hoop layer. The hoop reinforcement of the hoop layer is a hybrid hoop reinforcement made of a combination of 334tex PET and 330tex aramid fiber with a balance twist of 270 turns / meter (270tpm). Composition, the pitch P of the reinforcement is equal to 0.8mm. Curve S3 is the tensile curve of the hoop layer, the hoop reinforcement of the hoop layer is a hybrid hoop reinforcement, and is made of a...

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Abstract

The invention relates to the reinforcement that reinforces a passenger vehicle tyre. It targets good resistance to penetration and perforation of its crown by foreign objects, with a reinforcing architecture that is simple and lightweight. According to the invention, the hooping layer (71) has a breaking strength per mm of axial width of the hooping layer FR at least equal to 35 daN/mm, an elongation at break AR at least equal to 5% and a secant extension modulus MA at least equal to 250 daN/mm, for an applied force F equal to 15% of the rupture strength FR of the said hooping layer (71). Theworking reinforcement (6) comprises a single working layer (61) of which the working reinforcements form, with the circumferential direction (YY'), an angle AT at least equal to 30 degrees and at mostequal to 50 degrees. The carcass reinforcements of the at least one carcass layer (81) form, with the circumferential direction (YY') and in the equatorial plane (XZ), an angle Ac2 at least equal to55 degrees and at most equal to 80 degrees and having an orientation that is the opposite of that of the angle AT of the working reinforcers, so that the carcass reinforcers and the working reinforcers constitute a triangulation system.

Description

technical field [0001] The subject of the present invention is a tire for passenger vehicles, generally referred to as a passenger vehicle tire, and more particularly a reinforcement for a passenger vehicle tire. Background technique [0002] Since the tire is a toroidal structure, the axis of revolution of which is the axis of rotation of the tire, the terms used in the present invention are defined as follows: [0003] - "axial direction": a direction parallel to the axis of rotation of the tyre, [0004] - "radial direction": a direction perpendicular to the axis of rotation of the tyre, [0005] - "circumferential direction": the direction perpendicular to the radial plane containing the axis of rotation of the tyre, [0006] - "radial plane": the plane containing the axis of rotation of the tyre, [0007] - "equatorial plane": the plane perpendicular to the axis of rotation and passing through the center of the tread. [0008] A tire generally comprises a tread inte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C9/20B60C9/07
CPCB60C9/07B60C9/2009B60C2009/2261B60C2009/2276B60C2009/228B60C9/005B60C9/2003B60C9/22B60C2009/2019B60C2009/2214B60C2009/2228B60C2009/2233B60C2009/2266
Inventor C·勒克莱尔J·皮诺R·科尔尼耶
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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