Tire

一种轮胎、轮胎周向的技术，应用在越野车轮胎、轮胎零部件、轮胎胎面/胎面花纹等方向，能够解决干燥路面操纵稳定性能变差、花纹刚性降低等问题，达到提高操纵稳定性能、防止湿路性能的降低、优异泥路性能的效果

Active Publication Date: 2018-09-25
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, as mentioned above, if the groove volume is increased, the pattern rigidity of the tread portion will decrease, and there is a problem that the steering stability performance on dry roads will be deteriorated.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0067] Prototypes based on the specifications in Table 1 have figure 1 The tires with the basic pattern and the size of 265 / 70R17 were tested, and the mud road performance, wet road performance and handling stability on dry road surface of each test tire were tested. The main common specifications and test methods of each test tire are as follows.

[0068]

[0069] Maximum Length B / Maximum Length A: 50(%)

[0070] Ratio of tire radial height H2 / H1: 47(%)

[0071] Protrusion length ratio E / F: 20(%)

[0072] "End side" in the table indicates that the center portion is shifted to either side in the tire circumferential direction. In addition, the numerical value of the 1st protrusion part is shown in a table|surface.

[0073]

[0074] Each test tire was mounted on all wheels of a four-wheel drive vehicle with a displacement of 3600 cc under the following conditions. Then, the test driver drives the car on the soft road surface formed by mud, the wet asphalt road surface ...

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PUM

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Abstract

A tire of the present invention can exhibit good mud path performance, wet performance, and steering stability performance on a dry road surface. A tire 1 comprises a tread portion 2 comprising a plurality of blocks 5. In a development view of the tread portion 2, at least one of the blocks 5 include a block body 6 arranged between lateral grooves 4 and a protruding portion 7 protruding from the block body 6 toward a main groove 3. The protruding portion 7 comprises a first part 8 having a ground contacting surface (8a) extending continuously from the block body 6 and a second part 9 arrangedcloser to the main groove 3 than the first part 8 and on an inner side of the ground contacting surface (8a) in a tire radial direction.

Description

technical field [0001] The present invention relates to a tire having a plurality of blocks formed on a tread portion. Background technique [0002] For example, Patent Document 1 below proposes a tire having a plurality of blocks divided by main grooves and lateral grooves in the tread portion. It is known that in such block tires, for example, in order to improve the running performance on soft roads, that is, the mud performance, and the running performance on wet roads (hereinafter, simply referred to as "wet performance"), increase the Groove volume. [0003] However, as described above, if the groove volume is increased, the pattern rigidity of the tread portion decreases, and there is a problem that the steering stability performance on a dry road surface deteriorates. [0004] Patent Document 1: Japanese Patent Laid-Open No. 2016-113066 Contents of the invention [0005] The present invention is made in view of the above-mentioned actual situation, and its purpo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/03
CPCB60C11/032B60C11/11B60C2011/1361B60C11/1307B60C11/0306B60C11/1204B60C11/1236B60C2011/1213B60C11/1353B60C2011/1338B60C2200/14B60C11/1369
Inventor 西胁隆志
Owner SUMITOMO RUBBER IND LTD
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