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Tyre tread comprising complex grooves and incisions

A tire tread and tread technology, applied in the field of tread patterns, can solve the problems of poor noise performance and other issues

Active Publication Date: 2021-04-27
MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] However, the combination of these sipes for acceptable grip and especially the composite grooves with open cavities and hidden cavities (when new) results in poorer performance in terms of noise

Method used

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  • Tyre tread comprising complex grooves and incisions
  • Tyre tread comprising complex grooves and incisions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0069] The invention was tested on heavy vehicle tires of size 315 / 70R 22.5.

[0070] This tread 1 has a width W equal to 265 mm and a thickness of abraded material equal to 13 mm; it is provided with a tread pattern formed by five circumferentially oriented composite grooves of a depth equal to 13 mm.

[0071] The compound groove has an outer cavity, which opens to the tread surface when new, and an inner cavity, which is hidden within the tread. These outer cavities and inner cavities are joined together to form compound grooves over the entire circumference of the tire. The average width of these internal and external cavities is equal to 8 mm. The depth of the outer cavity and the inner cavity is equal to 13mm.

[0072] The external cavity 311 has, on the tread surface 10 , an elongated, symmetrical octagonal profile 310 when new, said profile 310 having a mean length Lm equal to 33 mm in this variant. These external cavities 311 are arranged at a pitch equal to 66 mm i...

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Abstract

The invention is a tyre tread (1), having a tread design depth Hm, comprising at least two longitudinally oriented grooves (31, 41, 42), at least one of these longitudinally oriented grooves being referred to as a complex groove (31), i.e. comprising, when new, alternating outer cavities (311) open on the rolling surface and inner cavities (312) hidden in the thickness of the tread. The outer cavities (311) have an average longitudinal length Lm, a depth of at least 0.9 Hm, and are separated by inner cavities with an average longitudinal length Li, Li being at least equal to 0.5*Lm and at most equal to 2*Lm. At least one rib (21) oriented in the longitudinal direction delimited by a complex groove comprises transverse incisions (5), implanted with an average pitch Pm. The pitch Pm of the transverse incisions is at most equal to the average longitudinal length Lm of the outer cavities (311).

Description

technical field [0001] The present invention relates to treads for tyres, and more particularly to tread patterns for these treads, which are more durable in rain drainage, which treads also exhibit improved properties in terms of wear and rolling resistance; the present invention It also relates to a tire provided with said tread. Background technique [0002] It is well known that the rainy driving conditions of vehicles, especially (but not only) heavy vehicles, require rapid drainage of water that may be located in the contact patch where the tire or more particularly its tread is in contact with the road surface. This discharge makes it possible to ensure contact between the material from which the tread is made and the road surface. Water that is not pushed toward the front and sides of the tire flows or partially collects in cuts or voids formed in the tire tread. [0003] The fluid flow network formed by these cuts or voids needs to be durable, that is to say be ab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/03B60C11/04B60C11/12
CPCB60C11/0323B60C11/033B60C11/042B60C11/1236B60C2011/0346B60C2011/0386B60C2011/1209B60C2011/1295B60C2200/06B60C2011/0355
Inventor W·贾布尔H·贝拉尔比
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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