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Pneumatic tire

A pneumatic tire, tire circumferential technology, applied in the direction of pneumatic tires, tire parts, tire tread/tread pattern, etc., to achieve wet performance improvement, wet performance and dry performance efficiently, wet performance and dry performance Both effects

Active Publication Date: 2020-09-11
THE YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a problem that both the dry handling stability and the wet handling stability of the tire should be taken into account.

Method used

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  • Pneumatic tire
  • Pneumatic tire
  • Pneumatic tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0152] Figure 9 It is a graph showing the results of a performance test of a pneumatic tire according to an embodiment of the present invention. Figure 10 is showing Figure 9 An explanatory diagram of a test tire of the described conventional example.

[0153] In this performance test, evaluations related to (1) dry steering performance and (2) wet steering performance were performed on various types of test tires. In addition, a test tire having a tire size of 245 / 40R18 97Y was assembled to a rim having a rim size of 18×8.5J, and a predetermined internal pressure and a predetermined load of JATMA were applied to the test tire. In addition, the test tires were mounted on all the wheels of a passenger car as a test vehicle.

[0154] (1) In the evaluation related to dry handling stability performance, the test vehicle was driven at 60 [km / h] to 100 [km / h] on a test field with a dry road surface having a flat winding road. In addition, the test driver performed sensory eva...

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PUM

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Abstract

In a pneumatic tire of the invention, an inner second land part (32) is provided with: chamfer sections (321) which are formed on an edge portion on a tire grounding end T side of the inner second land part (32), and which, on the tread of the inner second land part (32), increase in chamfer width along the tire circumferential direction; and lug grooves (322) which, at one end portion, terminateinside the inner second land part (32) and which, at the other end portion, open to longitudinal center portions of the chamfer sections (321). In addition, an outer second land part (34) and an outershoulder land part (35) are provided with closed lug grooves (41) which, at one end portion, terminate inside the outer second land part (34) and, at the other end portion, terminate inside a grounding surface of the outer shoulder land part (35), and which extend in the tire width direction to pass through a circumferential fine groove (24).

Description

technical field [0001] The present invention relates to a pneumatic tire, and more specifically, to a pneumatic tire capable of achieving both dry steering stability and wet steering stability. Background technique [0002] In the pneumatic tires in recent years, there is a demand to improve the sports performance not only when traveling on a circuit, but also when traveling in an urban area or on a highway. Therefore, there is a problem that both the dry steering stability performance and the wet steering stability performance of the tire should be considered. As conventional pneumatic tires related to this problem, techniques described in Patent Documents 1 to 3 are known. [0003] prior art literature [0004] patent documents [0005] Patent Document 1: Japanese Patent No. 4755709 [0006] Patent Document 2: Japanese Patent No. 5629283 [0007] Patent Document 3: Japanese Patent Laid-Open No. 2016-74386 Contents of the invention [0008] The problem to be solved ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/13B60C5/00B60C11/03
CPCB60C11/1392B60C11/0304B60C2011/0341B60C2011/0388B60C2011/0381B60C2011/0383B60C2011/0372B60C2011/0365B60C11/1323B60C2011/0348
Inventor 水岛春菜
Owner THE YOKOHAMA RUBBER CO LTD