pneumatic tire

A technology for pneumatic tires and tires, which is applied to tire parts, tire treads/tread patterns, vehicle components, etc., and can solve problems such as reduced wear resistance and reduced rigidity

Active Publication Date: 2020-02-28
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, if the pneumatic tire is constructed to have such a tread pattern, for example, a problem arises that the rigidity of the pattern is reduced resulting in a decrease in abrasion resistance.

Method used

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Examples

Experimental program
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Effect test

example

[0102] According to the specifications shown in Table 1, a pneumatic test tire of size 215 / 60R17 for passenger cars has figure 1 Basic pattern shown. Test them for abrasion resistance and wet performance. Common specifications for test tires and test methods are as follows.

[0103] Tread contact patch width (TW): 158mm

[0104] Groove depth of each main groove: 8.2mm

[0105] Maximum groove depth outside of the first transverse groove: 6.6mm

[0106] Groove depth of each outer part of the second and third transverse grooves: 5.8mm

[0107] Groove depth of each sipe part: 4.0 to 5.5mm

[0108] Groove depth of each sipe: 4.0mm

[0109]

[0110] In the following cases, test tires were mounted on all wheels of a front-wheel drive passenger car having a displacement of 2400 cc. The test driver drove 20,000km on a dry asphalt test road, 25% of which was gravel. Then, the degree of wear of the tire on the main grooves and on each outer portion of the transverse grooves was m...

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Abstract

Provided is a pneumatic tire that balances enhanced wear resistance while maintaining high wet performance. On the tread, the pneumatic tire is provided with: a first tread edge; main grooves each extending continuously in the tire circumferential direction; a land portion adjacent to the main groove; and a lateral groove intersecting the land portion. The land portion includes: a first land portion having a first tread edge and provided with a first lateral groove; a second land portion adjacent to an inner side of the first land portion and provided with a second lateral groove; and a third The land portion is adjacent to the inner side of the second land portion and is provided with a third transverse groove. Each lateral groove includes: an outer portion extending from the land periphery on the first tread edge side; and a sipe portion connected to the outer portion. The axial length of the outside and the axial length of the sipe portion are assigned respective values.

Description

technical field [0001] The present invention relates to a pneumatic tire that balances enhanced wear resistance while maintaining high wet performance. Background technique [0002] Pneumatic tires excellent in wet performance have been in high demand in recent years. In order to enhance the wet performance of pneumatic tires, it has been proposed to form main grooves and lateral grooves having larger volumes on the tread. [0003] However, if the pneumatic tire is constructed to have such a tread pattern, problems arise such that the rigidity of the pattern is reduced resulting in a decrease in wear resistance. [0004] prior art publications [0005] Patent Gazette [0006] Patent Publication 1: JP2012-116306A Contents of the invention [0007] The problem to be solved by the present invention [0008] The present invention takes the above problems into consideration, and its main object is to provide a pneumatic tire that balances enhanced wear resistance while mai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C11/11B60C11/04
CPCB60C11/04B60C11/1369B60C11/0304B60C2011/1209B60C2011/0383B60C2011/0381B60C2011/0372B60C11/11B60C11/0327B60C11/1236B60C2011/0341B60C2011/0374
Inventor 木村真也
Owner SUMITOMO RUBBER IND LTD
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