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Aeration tyre

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 the deterioration of bump resistance to partial wear, achieve white noise, improve performance, The effect of reducing the suction noise

Inactive Publication Date: 2008-07-09
THE YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, on the contrary, there is a problem that the uneven wear resistance of the bumps formed by the V-shaped grooves will be degraded.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment

[0036] The size of all the tires used is 225 / 45ZR17, and the structures are manufactured respectively as listed in Table 1. figure 1 Invention tire 1-2, comparative tire 1-4 and the conventional tire with the average tire circumference length of the center bump and sipes shown, and the conventional tire in which the The extended linear main grooves and the sipes extending in the tire width direction form a block pattern.

[0037] In Tire 1-2 of the present invention and Comparative Tire 1-4, the groove width of the narrow grooves was 3 mm, and the groove area ratio was 33%. In addition, the average tire circumferential length of the bumps in the conventional tire is 3.5% of the tire circumferential length on the tire center line, and the groove area ratio is 33%.

[0038] Each of the test tires was assembled on a rim with a rim size of 17×7 1 / 2JJ, the air pressure reached 220kPa, and then assembled on a vehicle with a displacement of 2500cc. Time performance, noise performan...

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PUM

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Abstract

Six block rows extending in a tire circumference direction are formed by a central narrow groove, side main grooves and left and right lug grooves in a tread surface, the rotating direction of which is specified to one direction. The average tire circumference direction length of the blocks of the block rows in the center area of the tread surface is 4 to 5 % of the tire full circumference length on the tire center line. Each of the left and right lug grooves is formed as a tapered groove having wider groove width at the tire center line. Left and right main groove portions located between the lug grooves are formed as inclined grooves inclining so as to expand towards the reverse direction to the rotating direction of the tire. Subgrooves crossing the blocks in the tire width direction are formed on the surfaces of the blocks in the shoulder areas.

Description

technical field [0001] The present invention relates to a pneumatic tire, and more specifically, the present invention relates to an inflation tire capable of improving dry performance (running performance on a dry road) and wet performance (running performance on a wet road) while maintaining noise performance and uneven wear resistance tire. Background technique [0002] It is very difficult to achieve both wet performance and noise performance in a pneumatic tire having a block pattern formed by linear main grooves extending in the tire circumferential direction on the tread and extending across the tire width. The sipe grooves in the direction are divided into a plurality of bumps. That is, in order to improve wet performance, it is necessary to increase the groove width. As a result, the noise performance deteriorates due to the increased groove area. On the other hand, in order to improve the noise performance, it is necessary to narrow the width of the groove. As ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C11/04B60C11/03B60C11/11
CPCB60C11/11B60C11/0302B60C11/03
Inventor 石田昌宏
Owner THE YOKOHAMA RUBBER CO LTD
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