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Pneumatic tire

A pneumatic tire, tire circumferential technology, applied to road vehicle tires, tire parts, tire tread/tread pattern, etc., can solve the problems of water skid resistance reduction, water retention and other problems, and achieve the goal of suppressing water skid resistance performance reduction Effect

Inactive Publication Date: 2019-05-28
TOYO TIRE & RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, stagnation of water tends to occur in the central region, so the water skid resistance performance (the performance that suppresses the occurrence of water skid phenomenon) is reduced.

Method used

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  • Pneumatic tire
  • Pneumatic tire
  • Pneumatic tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0098] Example 1 is a tire having the following structure.

[0099] 1) Number of main slots 3: 4

[0100] 2) Rebound elastic modulus (23°C): 38%

[0101] 3) Hardness (23°C): 61

[0102] 4) Central main groove width W3b / shoulder main groove width W3a: 1.3

[0103] 5) The area of ​​the shoulder land portion 4a relative to the sum of the areas of the land portions 4: 22.5%

[0104] 6) The area of ​​the intermediate land portion 4b relative to the total area of ​​the land portion 4: 18.5%

[0105] 7) The area of ​​the central land portion 4c relative to the sum of the areas of the land portions 4: 18.0%

[0106] 8) Void ratio between the grounding ends 2d and 2d of the tread 2a: 36%

[0107] 9) Void ratio based on main tank 3: 29%

[0108] 10) Void ratio based on land groove 5: 7%

Embodiment 2

[0110] Example 2 is a tire with the following configurations changed from Example 1.

[0111] 5) The area of ​​the shoulder land portion 4a relative to the sum of the areas of the land portions 4: 19.0%

[0112] 6) The area of ​​the intermediate land portion 4b relative to the total area of ​​the land portion 4: 20.9%

[0113] 7) The area of ​​the central land portion 4c relative to the sum of the areas of the land portions 4: 20.2%

Embodiment 3

[0115] Example 3 is a tire in which the following configurations are changed from Example 1.

[0116] 5) The area of ​​the shoulder land portion 4a relative to the sum of the areas of the land portions 4: 20.0%

[0117] 6) The area of ​​the intermediate land portion 4b relative to the total area of ​​the land portion 4: 20.2%

[0118] 7) The area of ​​the central land part 4c relative to the sum of the areas of the land parts 4: 19.6%

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Abstract

The invention provides a pneumatic tire. The pneumatic tire includes a tread region having surface layer containing a tread surface that contacts the ground, the surface layer is formed from rubber having a rebound resilience that is 35% to 40%, the tread region includes a pair of shoulder main grooves arranged at outermost locations in a tire width direction and extending in a tire circumferential direction, and at least one center main groove arranged between the pair of shoulder main grooves and extending in the tire circumferential direction, and width of the at least one center main groove is greater than width of the shoulder main grooves.

Description

technical field [0001] The present invention relates to a pneumatic tire. Background technique [0002] Conventionally, as a pneumatic tire, a pneumatic tire formed of a predetermined rubber for reducing rolling resistance is known (for example, Patent Document 1). In addition, since the contact length (the length in the tire circumferential direction that contacts the ground) becomes longer the farther inward the tire width direction is, water tends to accumulate on the inner side in the tire width direction. [0003] On the other hand, in the pneumatic tire of Patent Document 1, the void ratio of the shoulder region is larger than the void ratio of the central region. As a result, stagnation of water tends to occur in the central region, so the water skid resistance performance (the performance of suppressing the occurrence of water skid phenomenon) is reduced. [0004] prior art literature [0005] patent documents [0006] Patent Document 1: Japanese Patent Laid-Open...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/03B60C11/12
CPCB60C11/0306B60C11/0304B60C2011/0383B60C2011/0025B60C11/033B60C11/0332B60C11/1236B60C11/1204B60C2200/04B60C2011/036B60C2011/0353B60C2011/0355B60C2011/0016B60C11/0008Y02T10/86B60C2011/0388
Inventor 金村利彦
Owner TOYO TIRE & RUBBER CO LTD