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Tire

A tire and tire circumferential technology, applied in tire parts, tire tread/tread pattern, transportation and packaging, etc., can solve the problems of reduced rigidity in the land part and reduced handling stability on dry roads, so as to suppress the reduction in rigidity. Effect

Active Publication Date: 2018-11-23
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a branch portion reduces the rigidity of the land portion near the tire equator, and there is a possibility that the steering stability on a dry road surface may be reduced.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0084] Based on the specifications in Table 1, a trial production with figure 1 The basic tread pattern is a pneumatic tire of size 205 / 55R16. As a comparative example, such as Image 6 As shown, a winter tire in which the branch portion communicates with the adjacent inclined groove was trial-manufactured. The handling stability on a dry road surface and the on-snow performance of each test tire were tested. Common specifications and test methods for each test tire are as follows.

[0085] Test vehicle: Displacement 1800cc

[0086] Test tire installation position: all wheels

[0087] Rims: 16×7.0

[0088] Tire internal pressure: front wheel 220kPa, rear wheel 220kPa

[0089] Tread contact width: 172mm

[0090] Groove depth of inclined groove: 8.5mm

[0091] Land Ratio: 70%

[0092] Rubber hardness of tread rubber: 52

[0093]

[0094] The steering stability of the above-mentioned test vehicles when running on a circular track on a dry road surface was evaluated by...

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Abstract

The invention provides a tire. Handing stability on a dray road face is maintained and excellent performance on snow can be developed. The tire comprises a tread portion 2. The tread portion 2 comprises a plurality of first oblique grooves 10A extending obliquely from a first tread edge Te1 positioned on one side in a tire axial direction toward a tire equator C. Each of the first oblique grooves10A comprises a main body portion 12 extending from the first tread edge Te1 without reaching the tire equator C and a branch portion 13 branching off from the main body portion 12 and extending to cross the tire equator. The branch portion 13 terminates without being connected with other grooves than the first oblique grooves 10A.

Description

technical field [0001] The present invention provides a tire capable of maintaining steering stability on a dry road surface and exhibiting excellent on-snow performance. Background technique [0002] For example, Patent Document 1 below proposes a winter tire. In the tread portion of the tire of Patent Document 1, a plurality of inclined grooves extending obliquely from one tread end toward the tire equator side are provided. The inclined groove of Patent Document 1 includes a main body portion extending from a tread end and extending in front of the tire equator, and a branch portion branching from the main body portion to cross the tire equator. [0003] However, the aforementioned branch portion of Patent Document 1 communicates with another inclined groove extending from the other tread end. Such a branch portion may lower the rigidity of the land portion near the tire equator, and further may lower the steering stability on a dry road surface. [0004] Patent Docume...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/03B60C11/12
CPCB60C11/0302B60C11/1236B60C2011/0374B60C2011/0388B60C11/01B60C2011/1213B60C2011/0383B60C11/1204B60C2011/0358
Inventor 藤本佑树木上雄希
Owner SUMITOMO RUBBER IND LTD
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