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Tire

A technology for tires and tire shoulders, which is applied to tire parts, tire tread/tread pattern, transportation and packaging, etc. It can solve the problems of reducing the longitudinal elasticity of sidewall rubber and failing to obtain handling stability, so as to suppress the air column The effect of resonance

Active Publication Date: 2017-07-28
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, tires in which the longitudinal elasticity of the sidewall rubber or the rubber hardness of the tread rubber are reduced have a problem that good steering stability performance cannot be obtained.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0074] Trial production according to the specifications in Table 1 has figure 1 The size of the basic pattern is 215 / 65R16 pneumatic tires, and the handling stability and noise prevention performance of each trial tire are tested. Common specifications and test methods for each trial tire are as follows.

[0075] Rims: 16×6.5J

[0076] Tire internal pressure: 240kPa

[0077] The depth of the outer middle longitudinal sipe = the depth of the inner middle longitudinal sipe

[0078] Depth of outer middle lateral sipe, depth of 1st inner middle lateral sipe: 5.7mm

[0079] Groove depth of outer middle horizontal groove, groove depth of inner middle horizontal groove: 4.0mm

[0080] Groove width of outer middle transverse groove / tire axial width of outer middle land portion: 9%

[0081] Groove width of inner middle transverse groove / tire axial width of inner middle land portion: 9%

[0082]

[0083] Each test tire was mounted on all wheels of a front-wheel-drive passenger c...

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PUM

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Abstract

A tire maintaining operation stability and exerting excellent anti-noise performance is provided and is a tire (1) the mounting direction of which to a vehicle is specified. A tread portion (2) includes a central portion (5), an outboard middle portion (6A) and an inboard middle portion (6B). The central portion (5) is provided with a central circumferential sipe (10). The outboard middle portion (6A) is provided with outboard middle lateral grooves (11), outboard middle longitudinal sipes (12) and outboard middle lateral sipes (13). The inboard middle portion (6B) is provided with inboard middle lateral grooves (15), inboard middle longitudinal sipes (16) and inboard middle lateral sipes (17). The number of the inboard middle lateral sipes (17) is greater than the number of the outboard middle lateral sipes (13).

Description

technical field [0001] The present invention relates to a tire that maintains steering stability performance and is capable of exhibiting superior noise-proof performance. Background technique [0002] In recent years, tires superior in noise-proof performance are being sought. In order to improve the noise prevention performance, for example, it is known to reduce the longitudinal elasticity of sidewall rubber provided on the sidewall portion or to reduce the rubber hardness of tread rubber provided on the tread portion. Such a tire deforms moderately when a ground contact pressure acts on it. Therefore, for example, the generation of standing waves is suppressed in the main grooves extending in the tire circumferential direction, and the air column resonance sound generated in the main grooves is suppressed. [0003] However, tires with reduced longitudinal elasticity of sidewall rubber or rubber hardness of tread rubber have a problem that good steering stability perfor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/03B60C11/12
CPCB60C11/0304B60C11/0306B60C11/1236B60C2011/0365B60C2011/0353B60C2011/1254B60C2011/0372B60C11/1263B60C2011/1209B60C2011/0348B60C2011/0344B60C2011/0381B60C2011/0341B60C2011/0388B60C11/1259B60C11/0302B60C2011/0358B60C2011/0386B60C2011/1268
Inventor 大泽荣希
Owner SUMITOMO RUBBER IND LTD
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