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Improvement to noise attentuator devices for tyres

A tire and resonance noise technology, which is applied to tire parts, tire tread/tread pattern, wheels, etc., can solve the problem of reducing the lateral stiffness of the tread and achieve the effect of reducing resonance noise

Inactive Publication Date: 2013-06-12
OCIETE DE TECH MICHELIN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular when this tread is subjected to tangential forces directed transversely, that is to say in a direction parallel to the axis of rotation of the tire on which said tread is provided, the cavity volume may lead to a considerable reduction in the transverse stiffness of the tread

Method used

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  • Improvement to noise attentuator devices for tyres
  • Improvement to noise attentuator devices for tyres
  • Improvement to noise attentuator devices for tyres

Examples

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Embodiment Construction

[0047] To make the drawings easier to understand, the same reference signs are used for the description of the different variants of the invention when they designate the same kind of structural or functional elements.

[0048] Figure 1 shows a part of a tread 1 according to the prior art described in the application with publication number WO 2009 / 095288. This FIG. 1 shows three ribs 2 with a circumferential orientation defining two grooves 3 . Each rib has a width Lt. In order to reduce the noise level caused by the resonance of the air in the two grooves 3, a plurality of cavities 4 in the shape of the letter "L" are formed in the central rib, each of the two branches of this cavity has a substantially same length. Thus, the total length Lc of this cavity in the circumferential direction (indicated by the direction YY'' in Figure 1) and the sum Ly is substantially equal to the total length Lc of this cavity in the transverse direction (indicated by the direction XX in Fig...

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Abstract

Tyre comprises a tread (1) having at least one generally circumferentially orientated groove (3) and a plurality of raised elements (21, 22), each of these raised elements comprising a contact face (11) of transverse width Lt and side walls (210), at least one raised element being provided with a plurality of resonant-noise attenuating devices, each device comprising a cavity (4) of elongate shape having a total volume Vc and opening onto a sidewall (210), this cavity (4) having a total length Lc which is greater than the transverse width Lt of the raised element and a geometry comprising several cavity parts (40, 41, 42, 43, 44, 45) joined together, the length Lc being equal to the sum of the lengths of all the cavity parts, each cavity (4) being extended over its entire length Lc by an incision (5) extending radially outwards to open onto the tread surface, this tread being such that the sum Ly of the lengths projected in the transverse direction, of each cavity is at least 1.5 times greater than the sum Lx of the lengths, projected in the circumferential direction, of each cavity.

Description

technical field [0001] This invention relates to tire treads and, more particularly, to the devices incorporated in these treads to reduce noise while driving. Background technique [0002] Typically, passenger car tires are provided with a carcass reinforcement, which in recent years has mostly been radial (radial) carcass reinforcement; in this configuration, the reinforcements of the carcass reinforcement are arranged to form a An angle of 80 degrees or more (this corresponds to saying that the reinforcement is contained in a meridian or radial plane (which contains the axis of rotation) or forms an inclination of at most 20 degrees with respect to this plane. [0003] Typically, these tires are provided with a crown reinforcement comprising a plurality of reinforcements immersed in an elastomeric base material. This crown reinforcement is covered radially on the outside with a tread made of rubber material having a surface designed to come into contact with the road whe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/04B60C11/12
CPCB60C11/0306B60C19/002B60C11/0323B60C11/1281Y10T152/10027B60C11/24B60C11/0327
Inventor P·贝尔瓦J-C·富尔
Owner OCIETE DE TECH MICHELIN
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