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Pneumatic tire

A technology for pneumatic tires and tires, which is applied to tire parts, tire treads/tread patterns, transportation and packaging, etc. It can solve the problems of drainage, snow column shear force reduction, drainage performance, deterioration of snow road performance, and difficult Balance and other issues

Active Publication Date: 2012-10-17
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 ditch volume is reduced, drainage performance and snow column shearing force are reduced, and there is a problem of deterioration of drainage performance and snow road performance.
In this way, the improvement of noise performance and icy road performance has an antinomy relationship with drainage performance and snow road performance, so it is difficult to balance the two

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0066] Manufacturing has figure 1 Pneumatic tires (size: 195 / 65R15) with a tread pattern based on the specifications in Table 1, and their performances were tested. Among them, the common specifications are as follows.

[0067] Tread contact width TW: 165mm

[0068]

[0069] Groove width W1 / Tread contact width TW: 5.8%

[0070] Groove depth D1: 9.0mm

[0071]

[0072] Groove width W2 / Tread contact width TW: 4.2%

[0073] Groove depth D2: 9.0mm

[0074]

[0075] Groove width W3 / Tread contact width TW: 3.3%

[0076] Groove depth D3: 9.0mm

[0077] Placement Lu / TW: 18.8%

[0078]

[0079] Groove width W4 / Tread contact width TW: 3.3%

[0080] Groove depth D4: 9.0mm

[0081] Arrangement position Ls / TW: 18.8

[0082]

[0083] Groove width W5: 4.0mm

[0084] Groove depth D5: 8.0mm

[0085]

[0086] Groove width W6: 3.5~4.0mm

[0087] Groove depth D6: 8.0mm

[0088] Depth of 8T lacing bars: 6.0mm

[0089] The length Lt / L3 of the tie rod: 22%

[0090]

[0...

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Abstract

A pneumatic tire has an asymmetrical tread pattern. An outboard central main circumferential groove extends zigzag and is made up of alternate minor and major groove segments. The major groove segments incline at an angle of from 5 to 30 degrees with respect to the tire circumferential direction. An inboard central main circumferential groove is widest in main circumferential grooves. outboard middle axial grooves are widest in axial grooves. The distance Li of the widthwise center line of the straight inboard central main circumferential groove from the tire equator is less than the distance Lo of the amplitude center line of the zigzag outboard central main circumferential groove from the tire equator.

Description

technical field [0001] The present invention relates to a pneumatic tire that suppresses reductions in drainage performance and noise performance and improves performance on icy and snowy roads. Background technique [0002] Studless tires suitable for driving on icy and snowy roads adopt a block pattern, that is, a plurality of patterns divided by multiple main grooves extending in the tire circumferential direction and multiple transverse grooves extending in the tire axial direction are arranged on the tread portion block, and a plurality of sipes are provided on the block. Such a studless tire exerts high performance on ice and snow roads by utilizing the edge effect of the sipe and the snow column shear force acting on each groove. On the other hand, due to the influence of global warming, such studless tires may also run on dry or wet roads, so in recent years, as with summer tires, improvements in noise performance and drainage performance have been demanded. In ord...

Claims

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Application Information

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IPC IPC(8): B60C11/03B60C11/12
CPCB60C11/11B60C11/0304B60C11/04B60C2011/0346B60C2011/1209B60C2011/0353B60C11/01B60C11/12B60C2011/0365
Inventor 沼田一起
Owner SUMITOMO RUBBER IND LTD
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