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pneumatic tire

A technology for pneumatic tires and tires, which is applied to tire components, tire treads/tread patterns, vehicle components, etc., and can solve the problems of reduced rigidity of the outer tread surface, wear resistance, and reduced handling stability, and achieves Effects of improving wet road performance, excellent wear resistance, and excellent handling stability

Active Publication Date: 2020-01-21
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, such inclined grooves reduce the rigidity of the outer tread portion, which in turn may reduce wear resistance and steering stability.
Therefore, the pneumatic tire of Patent Document 1 has room for further improvement in terms of wet performance, wear resistance, and steering stability.

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0062] Based on the specifications in Table 1, a trial production with figure 1 , Figure 5 as well as Figure 6 Either of the pneumatic tires with a basic tread pattern size of 205 / 55R16. As comparative example 1, a trial production was made Figure 7 tires shown. In the tire of Comparative Example 1, the distance from the tire equator to the first main groove was 0.78 times the width of the inner tread portion, and a slit connected to the outer tread edge Te2 was provided. As Comparative Example 2, a trial production with figure 1 A tire with a basic tread pattern in which the distance from the tire equator to the first main groove is 0.78 times the width of the inner tread portion. As Comparative Example 3, a trial production with figure 1 A tire in which the distance from the tire equator to the first main groove of the basic tread pattern is 0.15 times the width of the inner tread portion and the second main groove is provided on the tire equator. The wet road perf...

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Abstract

The present invention provides a pneumatic tire in which wet performance, wear resistance, and handling stability are improved in a balanced manner. The inner tread portion (5) is provided with a first main groove (11) extending continuously in the tire circumferential direction. The first main groove (11) is provided at a position separated from the tire equator (C) by a distance of 0.20 to 0.70 times the width of the inner tread portion (5) in the tire axial direction. Formed in the outer tread portion (6) are: a plurality of slits (25) whose bezels (26) are not connected to either the tire equator (C) or the outer tread end (Te2); and a shoulder land portion (24), which is continuous in the tire circumferential direction along the outer tread end (Te2).

Description

technical field [0001] The present invention relates to a pneumatic tire in which wet performance, wear resistance, and handling stability are improved in a balanced manner. Background technique [0002] For example, Patent Document 1 below proposes a pneumatic tire that is used both for road travel and circuit travel. In order to ensure the wet road performance of the pneumatic tire when running on road, the outer tread portion between the tire equator and the outer tread end is provided with an inclined groove connected to the outer tread end or the tire equator. [0003] However, such inclined grooves reduce the rigidity of the outer tread portion, thereby possibly reducing wear resistance and steering stability. Therefore, the pneumatic tire of Patent Document 1 has room for further improvement in terms of wet performance, wear resistance, and steering stability. [0004] Patent Document 1: Japanese Patent Laid-Open No. 2004-338628 Contents of the invention [0005]...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C11/03B60C11/12
CPCB60C11/0304B60C11/033B60C11/1204B60C11/032B60C11/13B60C19/001
Inventor 中野敏幸中野敬太小高和真
Owner SUMITOMO RUBBER IND LTD
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