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pneumatic tire

A technology of pneumatic tires and tires, which is applied to tire parts, tire treads/tread patterns, vehicle components, etc., to achieve the effects of improved handling stability, improved wear resistance, and high tire circumferential rigidity

Active Publication Date: 2018-09-14
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, such pneumatic tires have room for improvement in terms of wear resistance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0086] Based on the specifications in Table 1 the pair has figure 1 The basic pattern size of the pneumatic tire is 195 / 65R15 for trial production. As a comparative example, for the Figure 7 Trial production of pneumatic tires with the basic pattern. And test the handling stability performance, wet road handling performance, drainage performance and wear resistance performance of these test tires on dry road. Common specifications and test methods for each tire are as follows.

[0087] Mounting rim: 15×6.5J

[0088] Tire internal pressure: 230kPa

[0089] Test vehicle: front wheel drive vehicle, displacement 2000cc

[0090] Tire installation position: all wheels

[0091]

[0092] The driver's senses were used to evaluate the handling and stability performance of the test vehicle when it was running on a test route consisting of a dry asphalt road. The results are represented by the comparative example 1 as 100 evaluation points, and the larger the numerical value, th...

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Abstract

The invention provides a pneumatic tyre which is capable of maintaining operation stability and wet road performance while on a dry road and improving wear-resistant performance. A central land part (5), middle land parts (6) and tyre shoulder land parts (7) are marked out by arranging tyre shoulder main channels (3) and central main channels (4) on a tyre surface part (2) of the pneumatic tyre. The width W2 of the middle land part (6) is larger than the width of the central land part (5). The width W3 of the tyre shoulder land part (7) is larger than the width W2 of the middle land part (6). The central land part (5) serves as a rib. Each middle land part (6) is divided into a first middle land part (6A) and a second middle land part (6B) by a middle thin channel (21). Each middle land part (6) is provided with a plurality of middle cross channels (22). Each tyre shoulder land part (7) is provided with a plurality of tyre shoulder cross channels (31). The intervals among the tyre shoulder cross channels (31) are smaller than the intervals among the middle cross channels (22).

Description

technical field [0001] The present invention relates to a pneumatic tire that maintains handling stability on a dry road surface and wet road performance and improves wear resistance. Background technique [0002] In recent years, as the performance of vehicles has increased, pneumatic tires excellent in handling stability on dry roads and wet road performance have been demanded. [0003] Patent Document 1 below proposes a pneumatic tire in which the circumferential rigidity of each land portion in the center region and the shoulder region is improved. The purpose of this pneumatic tire is to improve the steering response performance, especially the steering stability performance on a dry road surface. [0004] However, such pneumatic tires have room for improvement in terms of wear resistance. [0005] Patent Document 1: Japanese Patent Laid-Open No. 2009-35130. Contents of the invention [0006] The present invention is proposed in view of the above-mentioned actual s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C11/12
Inventor 末吉裕介
Owner SUMITOMO RUBBER IND LTD
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