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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 the problems of decreased pattern rigidity, handling stability performance, deterioration of uneven wear resistance, etc. The effect of shoulder defect wear, improved uneven wear resistance, improved handling stability and uneven wear resistance

Active Publication Date: 2016-01-13
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the above-mentioned method, since the ground contact area is reduced, the pattern rigidity is lowered, so there is a problem that the handling stability performance, the uneven wear resistance performance are deteriorated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0053] Manufacturing has figure 1 Pneumatic tires for light trucks (size: 205 / 85R15) with a pattern based on the specifications in Table 1, and their performances were tested.

[0054] Among them, the common specifications are as follows.

[0055] Tread contact width TW: 150mm

[0056] Rim size: 15×5.5J

[0057]

[0058] Groove width W1 / Tread contact width TW: 5.1%

[0059] Groove depth: 10.1mm

[0060]

[0061] Groove width W2 / Tread contact width TW: 6.5%

[0062] Groove depth: 10.1mm

[0063]

[0064] Groove width W3 / Tread contact width TW: 1.8%

[0065]

[0066] Groove width W4: 2.2mm

[0067] Groove depth D4: 2.3mm

[0068]

[0069] Width: 6.0~9.0mm

[0070] Sipe depth: 8.5mm

[0071]

[0072] Width: 6.0~9.0mm

[0073] Sipe depth: 6.0mm

[0074] other

[0075]

[0076] Groove depth: 7.7mm

[0077]

[0078] Width: 2.0~5.0mm

[0079] Sipe depth: 5.0~10.0mm

[0080]

[0081] Each test tire was fitted to the four wheels of a Japanese-made ligh...

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Abstract

Provided is pneumatic tyre capable of inhibiting the decrease of the manipulation stability and anti-uneven wearing performance and raising wet-path performance. Under the state of loading standard load, the ground plane of the tyre face (2) is set into tthat: the grounding length of the tyre circumference upon the tyre equator (C) is 1.05-1.15 times of the ground length at the tyre shoulder. The axial land length (Wc) of the tyre of the central land part (5) is 0.8-1.0 times of axial land width (Ws) of the tyre shoulder land part (6). The central land part comprises a central assistant channel (7) and a central transverse channel (8), wherein the central assistant channel (7) is in the area closer to the axial inner side of the tyre than the central position of the land part width (Wc) and continuously extends in the circumferential direction of the tyre, with channel depth less than the average channel depth of the central main channel (3) and the tyre shoulder main channel (4); and the central transverse channel (8) connects the central main channel (3) to the tyre shoulder main channel (4), with the channel depth less than the average channel depth. The tyre shoulder land part (6) has a strip-like pattern continuously extending in the circumferential direction of the tyre without interruption.

Description

technical field [0001] The present invention relates to a pneumatic tire having improved wet road performance while suppressing reductions in handling stability and uneven wear resistance, and particularly relates to a pneumatic tire suitable for light trucks. Background technique [0002] There is known a pneumatic tire having a block pattern in which a plurality of blocks are formed on a tread portion. In recent years, such pneumatic tires have been required to further improve wet performance. In order to improve the wet performance, for the purpose of smoothly draining the water film between the tread portion and the road surface, for example, it has been proposed to increase the groove widths of the main grooves and lateral grooves provided in the tread portion. [0003] However, in the above-mentioned method, since the ground contact area is reduced, the pattern rigidity is lowered, so there is a problem that the steering stability performance and the uneven wear resis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C11/117
CPCB60C11/03B60C11/04B60C11/12B60C2011/0355B60C2011/0367
Inventor 破田野晴司
Owner SUMITOMO RUBBER IND LTD
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