pneumatic tire

A technology of pneumatic tires and tires, applied in pneumatic tires, reinforcement layers of pneumatic tires, special tires, etc., can solve the problem that the improvement effect of tire lightweight driving stability may not be sufficient, and achieve lightweight and driving stability. The effect of improving driving stability

Inactive Publication Date: 2016-03-16
THE YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, even with such a tire, the weight reduction and driving stability improvement effect of the tire may not be sufficient, and further improvement is required.

Method used

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  • pneumatic tire
  • pneumatic tire
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0058] Make the tire size 195 / 65R15, make the Young’s modulus of the inner liner, the thickness of the inner liner, the height H of the bead filler from the tire heel, the cross-sectional area of ​​the bead filler, and the shape of the bead filler , the deviation distance from the end of the carcass layer to the maximum tire width position, the deviation distance from the end of the carcass layer to the end of the bead filler, the overlapping amount of the inner liner and the bead filler, and the average rubber thickness of the sidewall , the line spacing of the bead core, the presence or absence of a reinforcing layer between the bead filler and the carcass layer, the tanδ of the sidewall rubber, and the ratio BW / SW of the tire section width SW to the tire maximum belt width BW 21 kinds of tires of Conventional Example 1, Comparative Example 1, and Examples 1-19 as shown in Tables 1-4 were determined.

[0059] It should be noted that, for the offset distance from the end of t...

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Abstract

The present invention proposes a pneumatic tire that achieves a high degree of weight reduction and driving stability of the tire. The height H of the bead filler (6) from the tire heel (3a) is 10-30 mm, and the inner liner (9) arranged inside the carcass layer (4) has a Young's modulus of 70-1500 MPa, a thickness of It is composed of a thermoplastic resin of 0.05-0.25mm or a thermoplastic elastomer composition mixed with a thermoplastic resin component and an elastomer component, and the end (9a) of the inner liner (9) is located The radially outer end portion (6a) is closer to the radially inner side of the tire.

Description

technical field [0001] The present invention relates to a pneumatic tire, and more specifically, to a pneumatic tire having a high degree of weight reduction and driving stability of the tire. Background technique [0002] In recent years, for the purpose of low fuel consumption of vehicles, it is required to reduce the weight of pneumatic tires. As a method for this weight reduction, countermeasures such as reducing the thickness of the rubber layer constituting the tire or reducing the number of carcass layers have been taken. However, when this countermeasure is adopted, the rigidity in the circumferential direction of the tire is greatly reduced, so there is a problem that the driving stability is reduced. [0003] Therefore, Patent Document 1 proposes that both ends of the carcass ply are folded back to a position beyond the maximum tire width, the height of the bead filler from the tire heel is 15 to 30% of the cross-sectional height of the tire, and the sidewall The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C5/14B60C9/08B60C9/18B60C13/00B60C15/04B60C15/06
CPCB60C5/142B60C2015/061B60C2013/007B60C1/0008B60C9/28B60C2015/009B60C15/0009B60C15/0603
Inventor 海老子正洋
Owner THE YOKOHAMA RUBBER CO LTD
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