Pneumatic tire

A technology for pneumatic tires and tires, which is applied to tire parts, tire treads/tread patterns, transportation and packaging, etc. It can solve problems such as deterioration of turning performance, rapid wear of the outer side, and decline in tire high-speed durability.

Inactive Publication Date: 2007-01-10
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, cornering performance such as cornering traction and grip deteriorates
In addition, if the outer portion of the tread located outside the straight ribs is divided into small tread members by lateral drainage grooves, the outer portion wears out rapidly, and the high-speed durability of the tire drops sharply

Method used

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  • Pneumatic tire
  • Pneumatic tire
  • Pneumatic tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] A pneumatic tire comprising: a tread portion with a tread edge; a pair of axially spaced bead portions; and a pair of The sidewall portion so that the tire has a toroidal shape.

[0024] The pneumatic tire 1 according to the present invention is provided with tread grooves defining a tread pattern in a tread portion 2 which is also provided with a rounded profile T1. figure 1 and figure 2 An example of a tread pattern and an example of a tread profile T1 are shown in .

[0025] The tread pattern according to the present invention is asymmetrical with respect to the tire equator line C, and the position of the sidewall portion with respect to the vehicle is fixed. In other words, the tire must be mounted on the rim so that the tread edge Eo (hereinafter referred to as "outer tread edge Eo") is outside the vehicle, and accordingly the other tread edge Ei (hereinafter referred to as "inner tread edge Ei") on the inside of the vehicle. Thus, the tire may be provided wi...

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PUM

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Abstract

A pneumatic tire comprises a tread portion provided with a nonlinear rib having an amplitude having a center in the tire axial direction. In a normally loaded condition of the tire, the tread portion has an outside tread edge and an inside tread edge when the camber angle of the tire is 0 degrees. In the normally loaded condition, when the a camber angle of 4 degrees is given to the tire to inline towards the outside tread edge, a foot print shape of the tire has a maximum circumferential length at an axial position MC which is off the tire equator towards the outside tread edge. The nonlinear rib is positioned off the tire equator towards the outside tread edge such that the axial position MC lies within the amplitude of the nonlinear rib, and one of the edges of the nonlinear rib on the outside tread edge side is chamfered.

Description

technical field [0001] The present invention relates to a pneumatic tire, and more particularly to an improved tread portion capable of improving cornering performance. Background technique [0002] In general, pneumatic tires for passenger cars, sport utility vehicles, sports cars, etc. are provided with tread grooves, and sometimes straight ribs are defined in the tread portion between two circumferential grooves. For example, Japanese Patent Application Publication No. JP-A-8-164714 ​​discloses a pneumatic tire in which two straight circumferential grooves are provided on only one side of the tire equator line on the tread portion. Thus, a single straight rib is formed only on one side of the tire equator line. Japanese Patent Application Publication JP-A-8-197912 also discloses a pneumatic tire having a tread portion provided with straight ribs only on one side of the tire equator line. [0003] When a pneumatic tire with a straight rib on one side of the tire equator ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/117
CPCB60C11/0332B60C11/13B60C2011/0388B60C11/0304B60C11/1369B60C11/0083
Inventor 村田雄彦
Owner SUMITOMO RUBBER IND LTD
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