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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 problems such as differences in drainage, reduce differences, suppress differences in drainage performance, and improve handling stability sexual effect

Active Publication Date: 2010-06-23
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in tires with an asymmetrical pattern, there is a problem that the drainage properties of the right tire T1 and the left tire T2 are different due to the inclination of the lateral grooves.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0050] Prototype has figure 1 The basic pattern, and based on the car radial tires of the specification tire size 245 / 40R18 in Table 1, the wet road performance, wear resistance performance and dry road performance were tested, and the results are recorded in Table 1. Except for the specifications described in Table 1, that is, except for the inclination direction and inclination angle of each lateral groove, each tire has substantially the same specification.

[0051] Tread width Tw=216mm

[0052] The land ratio Lo in the outer area = 35%

[0053] The land ratio Li in the inner area = 30%

[0054] Peripherally to the main groove 4o

[0055] Groove width Wg4o=8mm

[0056] Groove depth Hgo=7.7mm

[0057] Peripherally to the main groove 4i

[0058] Groove width Wg4i=8mm

[0059] Groove depth Hgo=7.7mm

[0060] Inner circumferential main groove 3o

[0061] Groove width Wg3o=13mm

[0062] Groove depth Hgi=8.1mm

[0063] Inner circumferential main groove 3i

[0064] Gr...

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Abstract

A tire having an asymmetric tread pattern that land proportion of outer side area is larger than inner side area, but having a reduced difference in drainage performance between tires on right and left wheels, the tire having tread surface (2) divided by four circumferential grooves (3 and 4) into center (5), middle (6,6) and shoulder lands (7,7), wherein middle (6o) and shoulder land (7o) in the outer side area (2o) are divided respectively by outer middle lateral grooves (8o) and outer shoulder lateral grooves (10o) into blocks (9o and 11o), inclination direction of the middle lateral grooves (8o) is opposite to that of the shoulder lateral grooves (10o) with respect to tire axial direction, and the lateral grooves (8o and 10o) are inclined at an angle mo between 5 DEG and 45 DEG and at an angle so between more than 0 DEG and not more than 40 DEG , respectively.

Description

technical field [0001] The present invention relates to a pneumatic tire having an asymmetric tread pattern with different tread patterns on both sides of the equator of the tire, and relates to a pneumatic tire which suppresses poor performance in the direction of rotation of the tire. Background technique [0002] In order to improve wet road performance in tires, various tread patterns using tread grooves have been proposed, wherein the tread grooves include a circumferential main groove extending along the tire circumferential direction and a transverse groove intersecting with it as one of them. For example, a tire with an asymmetric tread pattern different on both sides of the tire equator is known (for example, refer to Patent Document 1). [0003] In this tire with an asymmetric pattern, the land ratio of the outer region of the tread that is closer to the vehicle outer side than the tire equator when the vehicle is mounted can be set larger than the land ratio of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/03B60C11/01
CPCB60C2011/0383B60C11/1369B60C11/0304B60C2011/0381B60C11/0309B60C2011/0369B60C2011/1209B60C2011/0374B60C2011/0372B60C2011/0388B60C2011/0353
Inventor 松本忠雄
Owner SUMITOMO RUBBER IND LTD
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