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Tire

A tire, tire circumferential technology, applied in the direction of tire parts, tire tread/tread pattern, transportation and packaging, etc.

Active Publication Date: 2018-05-04
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the tire of Patent Document 1 has room for further improvement in improving snow performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0068] Based on the specifications in Table 1, a trial production with figure 1 The basic tread pattern is a tire of size 255 / 55R18. As Comparative Example 1, such as Figure 4 As shown in FIG. 1 , a tire without the outer inclined sub-groove and the inner inclined sub-groove was trial-manufactured. As Comparative Example 2, such as Figure 5 As shown, a tire provided with an inner inclined auxiliary groove and not provided with an outer inclined auxiliary groove was trial-manufactured. The snow performance, wet road performance and wear resistance performance of each test tire were tested. Common specifications and test methods for each test tire are as follows.

[0069] Mounting rim: 18×8.0J

[0070] Air pressure: front wheel 230kPa, rear wheel 250kPa

[0071] Test vehicle: Displacement 3000cc, four-wheel drive vehicle

[0072]

[0073] The distance when the above-mentioned test vehicle was accelerated from 5 km / h to 20 km / h on snow was measured by GPS, and the aver...

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PUM

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Abstract

The invention provides a tire capable of exerting excellent on-snow performance. The tire comprises a tread portion (2) comprising a first tread portion (2A) defined between a tire equator (C) and a first tread edge (Tel). The first tread portion (2A) comprises a shoulder main groove (5) extending circumferentially, continuously, and straight, oblique main grooves (10) extending obliquely from thefirst tread edge (Te1) toward the tire equator (C) to intersect the shoulder main groove (5), and oblique land regions (20) each defined between circumferentially adjacent pair of the oblique main grooves (10). At least some of the oblique land regions each comprise an outer oblique sub-groove (13) extending axially inside the shoulder main groove (5) from one of the pair of the oblique main grooves (10) and terminating within the oblique land region (20) and an inner oblique sub-groove (14) extending axially inside the outer oblique sub-groove (13) to completely intersect the oblique land region (20).

Description

technical field [0001] The present invention relates to a tire capable of exhibiting excellent on-snow performance. Background technique [0002] For example, Patent Document 1 below proposes a winter tire provided with a main groove continuously extending linearly in the tire circumferential direction and a plurality of inclined main grooves traversing the main groove. [0003] However, the tire of Patent Document 1 has room for further improvement in improving on-snow performance. [0004] Patent Document 1: Japanese Patent Laid-Open No. 2013-136333 Contents of the invention [0005] The present invention has been made in view of the above problems, and its main object is to provide a tire capable of exhibiting excellent on-snow performance. [0006] The tire of the present invention has a tread portion, wherein the tread portion has a first tread portion between the tire equator and the first tread end, and the first tread portion is provided with: a shoulder main gro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/12
CPCB60C11/1236B60C2011/0341B60C2011/0344B60C2011/0374B60C2011/0381B60C2011/0372B60C11/0302B60C11/0306B60C11/12B60C2011/0365
Inventor 长泽宏器
Owner SUMITOMO RUBBER IND LTD
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