Pneumatic tire

A technology of pneumatic tires and tires, which is applied to tire parts, tire tread/tread pattern, transportation and packaging, etc., to achieve the effects of increasing ground contact area, improving snow removal performance, and improving driving performance

Active Publication Date: 2011-05-11
THE YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the impact of global warming in recent years, driving on sherbet-like snowy roads in snowfall areas has increased.
As mentioned above, the existing pneumatic tires for ice and snow roads have not taken sufficient countermeasures against snow performance on snow-covered roads including sherbet-like snow-covered roads. Technology for on-snow performance on snowy roads with sherbet-like snow

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0056] Tires 1 to 5 of the present invention (present Examples 1 to 5), comparative tires 1 to 4 (comparative examples 1 to 4), and conventional tires (conventional examples) were produced as test tires, respectively. The tire size of these tires is 215 / 60R16, and the tread pattern, the groove area ratio of the contact patch region, and the groove area ratio of the central region are shown in Table 1.

[0057] In the tires 1 to 5 of the present invention and the comparative tires 1 to 4, the angles β1 and β2 of the first lateral groove and the second lateral groove varied within the range of 0 to 37°, respectively. In addition, the inclination angles α of the first inclination portions of the sub grooves were each 5°.

[0058] These test tires were respectively assembled on rims with a rim size of 16×6.5J, and the air pressure was set to 230kPa, and mounted on front wheels with an ABS (anti-lock braking system, anti-lock braking system) displacement of 2500cc. On the driving ...

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Abstract

There is provided a pneumatic tire capable of improving on-snow performance on a snowy road surface including a sherbet-like snowy road surface without deteriorating on-ice performance. An assistant groove 6 less in width than the main grooves 2 extends in the circumferential direction TC of the tire in each middle land 4. The lateral grooves 7 include right and left first lateral grooves 8 extending from the center land 3 outward in the widthwise direction of the tire beyond the tire ground contact ends TF, and right and left second lateral grooves 9 extending from the middle lands 4 outwardin the widthwise direction of the tire beyond the tire ground contact ends TF, the first lateral grooves 8 and second lateral grooves 9 being alternately disposed in the circumferential direction TC of the tire. The groove area percentage in the center region portion 1C of the tread surface 1 is less than the groove area percentage in the ground contact surface region G of the tread surface 1.

Description

technical field [0001] The present invention relates to a pneumatic tire used on ice and snow roads. Pneumatic tire with snow performance on the snow-covered road surface that melts a part of the snow-covered road surface). Background technique [0002] Conventionally, as a pneumatic tire used on icy and snowy roads, for example known Figure 4 Pneumatic tires as shown. This pneumatic tire is provided with four main grooves 22 extending in the tire circumferential direction and lateral grooves 23 extending in the tire width direction on the basis of consideration and design on the tread 21 provided with the sipe 20 . Thereby, performance on ice and performance on snow are balanced and improved (for example, refer to Patent Document 1). [0003] However, due to the influence of global warming in recent years, driving on sherbet-like snow-covered roads has increased in snowfall areas. As mentioned above, the existing pneumatic tires for ice and snow roads have not taken suf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C11/03B60C11/11B60C11/12
CPCB60C11/0306B60C11/12B60C2011/0388B60C11/033Y10S152/03Y10S152/902B60C11/03B60C11/11
Inventor 桥本佳昌
Owner THE YOKOHAMA RUBBER CO LTD
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