Tyre with improved wet grip in a part-worn state

A tire and wear level technology, applied in tire parts, tire tread/tread pattern, vehicle parts, etc., can solve problems such as danger and reduced effectiveness, and achieve good water removal and improved water removal.

Active Publication Date: 2017-08-18
OCIETE DE TECH MICHELIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this effectiveness decreases as the tires wear and driving becomes dangerous beyond a certain level of wear (if the tires are not replaced immediately)

Method used

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  • Tyre with improved wet grip in a part-worn state
  • Tyre with improved wet grip in a part-worn state
  • Tyre with improved wet grip in a part-worn state

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] figure 1 The tread of a tire according to the invention is schematically depicted in a new state.

[0036] This tread contacts the road while driving. It comprises a plurality of main grooves 1 arranged on each side of the mid-plane X-X' and having N main grooves 1 on each side. Each of these main grooves 1 opens axially (in the direction of an axis) to the outside of the tread, the axis being defined in a direction parallel to the axis of rotation of the tyre. This allows water to be removed towards the outside of the tire when the vehicle is running, that is to say starting from the end of the groove closest to the axis X-X' towards the end of the groove furthest from the axis X-X'. Each of these main grooves extends axially towards the mid-plane XX' such that the plurality of main grooves form a generally V-shaped pattern. The orientation of the V indicates the preferred direction of rotation of the tire. This direction of rotation is also indicated by arrow R. ...

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PUM

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Abstract

The invention relates to a tyre comprising a tread comprising a plurality of main grooves (1) positioned on each side of a mid-plane X-X', each of these main grooves (1) opening axially to the outside of said tread and extending axially toward the mid-plane X-X' in such a way that the plurality of main grooves forms a pattern with the overall shape of a V, characterized in that, once the degree of wear exceeds a certain level, at least one additional groove (3) appears between two circumferentially adjacent main grooves (N-1, N), said additional groove extending parallel overall to said main grooves (N-1, N).

Description

technical field [0001] The invention relates to the field of tires intended to be fitted to passenger cars and vehicles that can be used in winter. More specifically, the present invention relates to tires exhibiting improved performance in wet conditions in a partially worn condition. Background technique [0002] The grip of a tire on the road is a key factor that allows the driver of a vehicle to control its speed and its handling while driving. This grip becomes even more critical in winter, on wet ground with a layer of water that the tire must be able to remove, or the driver risks losing control of his vehicle completely. [0003] Document FR2291879 discloses a tire profile that makes it possible to improve the safety of vehicles traveling on wet roads. The profile consists of a number of semi-parabolic grooves starting in the middle part of the tire tread and proceeding towards the ends. Thus, the water present on the road and entering the tire profile is transpor...

Claims

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Application Information

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IPC IPC(8): B60C11/03B60C11/12
CPCB60C11/0302B60C11/0323B60C11/1281B60C2011/0344B60C2011/0313B60C2011/0358B60C11/1307
Inventor V·勒迪厄I·巴特尼尼D·法宾J-C·德罗贝尔-马聚尔
Owner OCIETE DE TECH MICHELIN
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