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Pneumatic tire

A pneumatic tire and tire technology, applied in tire parts, tire tread/tread pattern, transportation and packaging, etc., can solve problems such as insufficient drainage, wet road slippage, etc., to maintain handling stability and performance on snow, Traction on heavy snow and the effect of suppressing slippage

Active Publication Date: 2018-10-23
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when a tread pattern without a main groove as in Patent Document 1 is applied to a tire with a large tread width, there is a tendency for water drainage to be insufficient, and furthermore, a slipping phenomenon tends to easily occur on a wet road surface.

Method used

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  • Pneumatic tire
  • Pneumatic tire
  • Pneumatic tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0083] Based on the specifications in Table 1, a trial production with figure 1 The basic tread pattern is a pneumatic tire of size 255 / 55R18. As a comparative example, such as Figure 8 As shown, a tire having no main groove continuously extending in the tire circumferential direction was trial-manufactured. Each test tire was tested for handling stability on a dry road surface, wet road performance, and snow performance. Common specifications and test methods for each test tire are as follows.

[0084] Test vehicle: Displacement 3600cc, 4-wheel drive vehicle

[0085] Test tire installation position: all wheels

[0086] Rim: 18×8.0

[0087] Tire internal pressure: front wheel 230kPa, rear wheel 250kPa

[0088] Tread contact width: 224mm

[0089] Groove depth of inclined groove: 8.6mm

[0090] Ground width W1 / ground length L1: 1.46

[0091] Land Ratio: 67%

[0092] Rubber hardness Ht of tread rubber: 65

[0093]

[0094] The steering stability when the above-menti...

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Abstract

The pneumatic tire provided by the present invention is capable of maintaining steering stability and snow performance on a dry road surface and suppressing the slip phenomenon. A pneumatic tire having a tread portion (2); the tread portion (2) is provided with a main groove (11) extending continuously in the tire circumferential direction between the first tread end (Te1) on one side in the tireaxial direction and the tire equator (C), a plurality of inclined grooves (10) extending from the first tread end (Te1) toward the tire equator (C) side and forming a terminal end at a position crossing the main groove (11) toward the tire equator (C) side, and a plurality of inclined land portions (13) partitioned between the inclined grooves (10) adjacent in the tire circumferential direction. Alug groove (15) is provided in at least one of the inclined land portions (13) adjacent to the main groove (11). One end of the lug groove (15) is connected to the inclined groove (10), and the otherend is interrupted in the inclined land portion (13).

Description

technical field [0001] The present invention provides a pneumatic tire capable of maintaining handling stability and snow performance on a dry road surface and effectively suppressing a slipping phenomenon. Background technique [0002] For example, a winter tire is proposed in Patent Document 1 below. The tread portion of the tire of Patent Document 1 is provided with a plurality of inclined grooves extending obliquely from the tread end toward the tire equator side, and a plurality of inclined land portions divided between the inclined grooves. In addition, the main groove continuously extending in the tire circumferential direction is not provided in the tread portion of this tire. [0003] On the other hand, in tires in recent years, so-called widening of the tread, in which running performance is improved by increasing the tread width, has been progressing. However, when a tread pattern without a main groove as in Patent Document 1 is applied to a tire with a large tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/03B60C11/12
CPCB60C11/0302B60C11/0306B60C11/1236B60C2011/0388B60C2011/0374B60C2011/0372B60C11/0332B60C2011/0341B60C2011/0381
Inventor 田中皓一朗
Owner SUMITOMO RUBBER IND LTD
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