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Pneumatic tire

A technology of pneumatic tires and tires, applied in tire parts, tire treads/tread patterns, transportation and packaging, etc., can solve the problems of reducing performance on snow, reducing snow removal performance and performance on ice, and achieves suppression of air column. Effects of resonance, large snow column shearing force, and high grip

Active Publication Date: 2011-03-30
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, for studless tires, on-snow performance tends to be greatly reduced when the groove volume is reduced
In addition, when the ribs are used in the lateral grooves, the adjacent blocks in the circumferential direction are connected to each other, and the movement of the blocks at the time of contact is suppressed, so there is a tendency to reduce the snow discharge performance and ice performance.

Method used

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Examples

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Embodiment

[0075] In order to confirm the effect of the present invention, a trial production with figure 1 195 / 65R15 non-studded tires for passenger cars with a pattern based on the specifications in Table 1. Moreover, each test tire was installed on an imported car with a displacement of 2000cc with a rim of 15×6.0J and an internal pressure of 200kPa, and the braking performance on snow, driving performance on ice, handling stability and passing noise were tested. In addition, it is the same except for the parameter shown in Table 1. In addition, common specifications are as follows.

[0076] Tread contact width TW: 166mm

[0077] Groove width W1 of crown main groove: 7.2mm

[0078] Groove width W2 of shoulder main groove: 7.2mm

[0079] Configuration of shoulder main groove Wg2 / TW: 24%

[0080] Groove depth D1 of crown main groove: 9.1mm

[0081] Groove depth D2 of shoulder main groove: 9.1mm

[0082] Groove width W5 of the first crown transverse groove: change from 2.5 to 6.0m...

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Abstract

The present invention relates to a pneumatic tire capable of maintaining performance on snow, and improving operation stability and noise performance. A shoulder axial grove (10) comprises a first shoulder axial groove (11) having a groove width of not less than 3.5 mm.; a second shoulder axial groove (12) comprising an axially innermost sipe-like part (12b) having a groove width of 0.5 to 2.0 mm, and an axially outer main part (12a) having a groove width of not less than 3.5 mm. a crown axial groove (7) comprises a first crown axial groove (8) having a groove width of not less than 2.0 mm; and a second crown axial groove (9) comprising an axially innermost sipe-like part (9b) having a groove width of 0.5 to 2.0 mm, and an axially outer main part (9a) having a groove width of not less than 2.0 mm. In addition, the first and second shoulder axial grooves are formed on the tire circumference alternatively; the first and second crown axial grooves are alternatively formed on the tire circumference.

Description

technical field [0001] The present invention relates to a pneumatic tire capable of maintaining on-snow performance and improving handling stability performance and noise performance. Background technique [0002] Conventionally, various pneumatic tires such as studless tires capable of exhibiting superior running performance on icy and snowy roads have been proposed. In such a studless tire, a thin water film on an icy road can be effectively removed by the plurality of sipes provided on the outer surface of the tread portion, thereby obtaining grip required for driving and braking. In addition, the studless tire has a large volume of lateral grooves, thereby obtaining a large snow column shearing force and ensuring grip on snow. [0003] However, in recent years, studless tires tend to require dry road performance, especially noise performance, regardless of snow performance or icy road performance. Especially in Europe, since September 2009, restrictions on pass-through...

Claims

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Application Information

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IPC IPC(8): B60C11/03B60C11/117B60C11/12
CPCB60C11/12B60C11/0306B60C2011/0369B60C2011/0365B60C11/11
Inventor 景山尚纪
Owner SUMITOMO RUBBER IND LTD
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