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Pneumatic tire

A technology for pneumatic tires and shoulders, which is applied to tire parts, tire tread/tread pattern, rolling resistance optimization, etc., can solve the problems of water skid resistance reduction and retention, and achieve the effect of suppressing water skid resistance performance reduction

Inactive Publication Date: 2019-05-24
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 inner region when the vehicle is installed, so the water skid resistance performance (the performance of suppressing 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

[0106] Example 1 is a tire having the following structure.

[0107] 1) Number of main slots 3: 4

[0108] 2) Rebound elastic modulus (23°C): 38%

[0109] 3) Hardness (23°C): 61

[0110] 4) The sum of the area of ​​the main grooves on the inside of the vehicle / the sum of the areas of the main grooves on the outside of the vehicle: 1.1

[0111] 5) The area of ​​the outer shoulder land portion 4b relative to the sum of the areas of the land portions 4: 22.5%

[0112] 6) Void ratio between the grounding ends 2d and 2d of the tread 2a: 36%

[0113] 7) Void ratio based on main tank 3: 29%

[0114] 8) Void ratio based on land groove 5: 7%

Embodiment 2

[0116] Example 2 is a tire with the following configurations changed from Example 1.

[0117] 5) The area of ​​the outer shoulder land portion 4b relative to the sum of the areas of the land portions 4: 19.0%

Embodiment 3

[0119] Example 3 is a tire in which the following configurations are changed from Example 1.

[0120] 5) The area of ​​the outer shoulder land portion 4b relative to the sum of the areas of the land portions 4: 20.0%

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Abstract

The present invention provides a pneumatic tire. The pneumatic tire includes a tread region having surface layer containing a tread surface that contacts the ground, and a sidewall region having an indicator region that indicates a vehicle mounting direction, the surface layer is formed from rubber having a rebound resilience that, is 35% to 40%, the tread region comprises a plurality of main grooves that extend in a tire circumferential direction, the total area of that portion of the main grooves which is or are arranged to an inboard side of a center in a tire width direction of the tire asit is to be mounted on a vehicle is greater than total area of that portion of the main grooves which is or are arranged to an outboard side of the center in the tire width direction of the tire as it is to be mounted on the vehicle.

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, when a pneumatic tire is mounted on a vehicle with a negative camber, since the ground contact length (the length of the ground contact tire circumferential direction) of the inner region when the vehicle is mounted is longer than the ground contact length of the outer region when the vehicle is mounted, , In the area inside the vehicle when it is installed, water retention is prone to occur. [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 region inside when the vehicle is mounted, and thus the water skid resistance performance (per...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/03B60C11/12
CPCB60C11/0332B60C2011/0016B60C2011/0381B60C11/033B60C11/0304B60C11/0306B60C2011/0388B60C2011/0334B60C2011/0025Y02T10/86B60C2011/0353B60C11/0008B60C2011/0341B60C2011/0358
Inventor 金村利彦
Owner TOYO TIRE & RUBBER CO LTD