Pneumatic tire

一种充气轮胎、轮胎的技术，应用在轮胎零部件、轮胎胎面/胎面花纹、运输和包装等方向，能够解决胎块刚性下降、偏磨损、干燥路面操纵稳定性能恶化等问题，达到排水性能提高、抑制偏磨损、实现刚性的效果

Inactive Publication Date: 2010-10-13
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, they have problems in that an increase in the number of sipes leads to a decrease in block rigidity, resulting in deterioration of steering stability on dry roads or occurrence of uneven wear.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0071] In order to confirm the effect of the present invention, there is figure 1 A 225 / 45R17 passenger radial tire was trial-manufactured based on the pattern and specifications in Table 1. Then, these tires were tested for braking performance on ice, driving performance on snow, and partial wear resistance. In addition, the parameters other than those shown in Table 1 are the same.

[0072] In addition, the common specifications are as follows.

[0073] Tread contact width TW: 201mm

[0074] Gentle slope of the middle transverse groove: yes

[0075] Gently sloped part of shoulder transverse groove, groove rib and sipe: Yes

[0076] The groove shape on the side of the tread ground contact end of the crown circumferential groove: parallel to the tire equator C.

[0077] Groove width Tg1 / TW of crown circumferential groove: 5%

[0078] Groove width Tg2 / TW of shoulder circumferential groove: 4%

[0079] Groove width Tg3 / TW of the main portion of the crown transverse groove...

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PUM

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Abstract

The invention provides a pneumatic tire, which can prevent partial abrasion and promote the performance on ice and snow road. A rotating direction (R) is defined on the pneumatic tire. The pneumatic tire has a first V-shaped groove (10A) and a second V-shaped groove (10B), wherein the first and second V-shaped grooves (10A;10B) are terminated within the rib (5); one end (14) of the first V-shaped groove (10A) is communicated with a crown circumferential groove(3A) while the other end (15) exceeds a tire equator (C) but not reach another crown circumferential groove (3B); one end of the second V-shaped groove (10B) is communicated with a crown circumferential groove(3B) while the other end exceeds a tire equator but not reach the crown circumferential groove (3B); and the first and second V-shaped grooves (10A;10B) comprise a primary part (11) which extends from one end to the tire equator along the rotating direction and a bent part (12) which is connected to the primary part and is substantially bent on the tire equator along the direction reverse to the rotating direction.

Description

technical field [0001] The present invention relates to a tire that can be driven to a certain extent on ice and snow roads in addition to dry roads, and in particular, a pneumatic tire that can suppress the occurrence of partial wear and improve performance on ice and snow roads. Background technique [0002] Conventionally, it is known that block rigidity is increased by increasing the land ratio of the tread portion as much as possible in order to improve handling stability on dry roads. However, if the land ratio is increased too much, the on-snow performance tends to deteriorate due to a decrease in the snow column cutting effect on the snowy road due to a decrease in the groove volume. [0003] In addition, it is known to form sipes on tire blocks or the like and to increase bead components for the purpose of improving steering stability on icy and snowy roads. However, they have problems in that an increase in the number of sipes leads to a decrease in block rigidity...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/03B60C11/13
CPCB60C2011/0388B60C2011/036B60C2011/0381B60C11/0309B60C11/13B60C2011/0369B60C11/1369B60C11/0302B60C2011/0395B60C2011/0362
Inventor 向井友幸
Owner SUMITOMO RUBBER IND LTD
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