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Pneumatic tire

A technology of pneumatic tires and tires, applied in the direction of pneumatic tires, tire parts, tire treads/tread patterns, etc.

Active Publication Date: 2021-06-22
THE YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The technical problem with conventional pneumatic tires is the need to balance driving stability on dry and wet roads and noise performance related to pass-through noise

Method used

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  • Pneumatic tire
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0078] Tables 1 to 5 are tables showing performance test results of the pneumatic tires of the present invention. In this performance test, evaluations were performed on the driving stability performance on dry road, the driving stability performance on wet road, and the noise performance for mutually different pneumatic tires. In these performance tests, a test tire of size 225 / 60R17100H was mounted on a rim with a rim size of 17 x 7.5 JJ and was given an air pressure of 240 kPa. In addition, as a test vehicle, a front engine front drive (FF, Front engine Front drive) type sports utility vehicle (SUV, Sport Utility Vehicle) with a displacement of 2400 cc was used.

[0079] In the evaluation regarding the driving stability performance on a dry road surface, the test vehicle was driven at a speed of 60 to 100 km / h on a test course on a dry road surface having a flat winding road. In addition, the test driver performed a sensory evaluation on the maneuverability when changing l...

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Abstract

In order to provide both steering stability on dry and wet road surfaces and noise performance, a pneumatic tire 10 has: a first main groove 11 that extends in the tire circumferential direction at a position on the outside of the tire equatorial plane CL in the vehicle width direction; a second main groove 12 that extends in the tire circumferential direction at a position closer to the tire equatorial plane CL than the first main groove 11; a third main groove 13 that extends in the tire circumferential direction at a position on the inside of the tire equatorial plane CL in the vehicle width direction; a fourth main groove 14 that extends in the tire circumferential direction at a position further away from the tire equatorial plane CL than the third main groove 13; a first narrow groove 15 that extends in the tire circumferential direction between the third main groove 13 and the fourth main groove 14 ; and a first groove section 30 that extends in the tire width direction between the first narrow groove 15 and the fourth main groove 14 and has one end thereof opening to the fourth main groove 14. The groove width G1 of the first main groove, the groove width G3 of the third main groove, and the groove width G4 of the fourth main groove fulfill the relationships 1.05 <= G1 / G3 <= 1.25, 1.10 <=G4 / G3 <= 1.30, and G3 < G1 < G4.

Description

technical field [0001] The present invention relates to a pneumatic tire. Background technique [0002] A technical problem in conventional pneumatic tires is that it is necessary to balance driving stability on dry roads and wet roads, and noise performance related to pass-through noise. The techniques described in Patent Document 1 and Patent Document 2 are known as conventional pneumatic tires related to this technical problem. [0003] prior art literature [0004] patent documents [0005] Patent Document 1: International Publication No. 2015-005194 [0006] Patent Document 2: Japanese Patent No. 5695476 Contents of the invention [0007] The problem to be solved by the invention [0008] The pneumatic tires described in Patent Document 1 and Patent Document 2 still have room for improvement in terms of both driving stability on dry and wet roads and noise performance related to passing noise. [0009] An object of the present invention is to provide a pneumatic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C5/00B60C11/03B60C11/12
CPCB60C11/0304B60C2011/0353B60C2011/0348B60C2011/0351B60C2011/0381B60C2011/0388B60C2011/1209B60C2011/0393B60C2011/0395B60C11/0306B60C11/1236B60C11/03B60C11/12B60C2011/0355
Inventor 长桥祐辉
Owner THE YOKOHAMA RUBBER CO LTD
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