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Inflatable tyre

A technology for pneumatic tires and tire treads, which is applied to tire parts, wheels, tire treads/tread patterns, etc., and can solve the problems of large tread noise and noise performance deterioration

Inactive Publication Date: 2004-02-25
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when the groove volume of the lateral groove c2 is increased as described above, there is a problem that the noise performance deteriorates such as relatively large tread noise when driving in urban areas on paved roads.

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0049] One embodiment of the present invention will be described below with reference to the drawings.

[0050] figure 1 It is a developed view in which the tire tread portion of the pneumatic tire (not shown in its entirety) of the present embodiment is developed, figure 2 Indicates the partially enlarged side of the tire equator C. In the illustration, the pneumatic tire of this embodiment is suitable for being mounted on a 4WD vehicle, etc., and can be run on uneven terrain such as muddy ground in addition to paved roads. Compared with general summer tires for passenger vehicles, the land ratio (the ratio of the total area of ​​the actual contact portion to the total area of ​​the tire tread contact surface when there is no groove) is set smaller, for example, it can be set It is about 0.60 to 0.70, preferably 0.60 to 0.65. The inner configuration of the tire is not shown, but may be formed, for example, in a radial configuration.

[0051] In this embodiment, a pair o...

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Abstract

Provided is a pneumatic tire having excellent mud performance and noise performance. This pneumatic tire has a shoulder longitudinal channel close to a tread ground contact end most and extending continuously in tire peripheral direction and a shoulder lateral channel whose one end is communicated with the shoulder longitudinal channel and whose other end is extended in tire axial direction by crossing an outer side in tire axial direction to form a shoulder block B along the tread ground contact end E. The shoulder lateral channel includes a first shoulder lateral channel having large channel width WLo in the peripheral direction at the tread ground contact end E and a second shoulder lateral channel whose channel width WSo in the peripheral direction at the tread ground contact end E is smaller than channel width WLo of the first shoulder lateral channel. The first and second shoulder lateral channels are alternately provided and separated from each other in the peripheral direction of the tire. Communicating part channel width ratio which is ratio of channel width WLi to WSi (WLi / WSi) in the peripheral direction in communicating parts of the first and second shoulder lateral channels with the shoulder longitudinal channel is smaller than ground contact end channel width ratio which is ratio of the channel width WLo to WSo (WLo / WSo).

Description

technical field [0001] The present invention relates to a pneumatic tire which is suitable for being mounted on a 4WD vehicle or the like capable of running on uneven terrain such as muddy ground and on paved roads, and which can achieve both muddy performance and noise performance. Background technique [0002] Not only in urban areas with paved roads, but also on muddy ground and other uneven terrain, the tires installed on 4WD vehicles are required to be able to exert sufficient driving force on muddy ground, that is, the so-called muddy performance. It has excellent quietness and other noise performance when driving in urban areas with paved roads. [0003] Known tires of this type, such as Figure 4 As shown, generally longitudinal grooves b1, b2 and transverse grooves c1, c2 extending continuously along the wheel circumference direction are formed on the tire tread, and a shoulder d is formed at least along the ground contacting end of the tire tread. Furthermore, in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/117B60C11/00B60C11/04B60C11/11
CPCB60C11/11B60C11/0318B60C2011/0346B60C2011/0348B60C2011/0365Y10T152/10765
Inventor 平居悟史
Owner SUMITOMO RUBBER IND LTD