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Tire

A tire and tire circumferential technology, applied to tire parts, tire tread/tread pattern, transportation and packaging, etc., can solve the problems of noise performance deterioration, large air vibration, etc., to improve mud performance and mud performance Improved performance and high noise performance

Active Publication Date: 2018-10-23
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in such a tire with a large groove volume, there is a problem that the vibration of the air in the groove compressed by the ground contact becomes large, and the noise performance deteriorates.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0079] Prototyped according to the specifications in Table 1 with figure 1 The tires for four-wheel drive vehicles with the basic pattern size 265 / 70R17 were tested, and the mud performance, noise performance, handling stability and wet performance of each tire were tested. The main common specifications and test methods of each test tire are as follows.

[0080] The depth d1 of the main groove: 10.5mm

[0081]

[0082] Each test tire was mounted on all wheels of a four-wheel drive vehicle with a displacement of 5300 cc under the following conditions. Then, the test driver drove the car on each test track formed of a soft road surface formed of mud (depth 30 cm), a dry asphalt road surface, and a wet asphalt road surface. Furthermore, the test driver sensory evaluated running characteristics related to traction, running stability, and cornering performance at this time. The results are shown using a score with Comparative Example 1 as 100. The higher the value, the bette...

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Abstract

The invention provides a tire capable of exerting good mud performance and dirt performance. A tire(1) includes a tread portion including a main groove(3), a first block(4) and a second block(5) whichare adjacent to one another in a tire axial direction through the main groove. The main groove includes first groove elements(6) and second groove elements(7) having groove widths smaller than that of the first groove elements. The first block includes a first ground contact surface(4a), a first sidewall(9) facing one of the second groove elements(7), a first corner portion between the first ground contact surface and the first sidewall, and a first recess(18) being cut out the first corner portion(4c) locally. The second block includes a second ground contact surface, a second sidewall(14) facing said one of the second groove elements(7), a second corner portion between the second ground contact surface and the second sidewall, and a second recess(19) being cut out the second corner portion(5c) locally.

Description

technical field [0001] The present invention relates to a tire, in particular, relates to a tire suitable for running on soft roads. Background technique [0002] For example, in tires for four-wheel-drive passenger cars, there are opportunities for running on soft roads such as muddy ground. In such tires, for example, on soft road surfaces, it is known to increase the groove volume in order to improve the so-called mud performance, which exerts sufficient mud-holding force and soil-discharging performance. [0003] However, in such a tire with a large groove volume, the vibration of the air in the groove compressed by the ground contact becomes large, and there is a problem that the noise performance deteriorates. [0004] Patent Document 1: Japanese Patent No. 5444487 Contents of the invention [0005] The present invention is conceived in view of the above actual situation, and its main purpose is to provide a tire that can maintain noise performance and improve mud ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/03B60C11/12
CPCB60C11/0304B60C11/1204B60C11/1272B60C2011/0353B60C2011/0355B60C2011/0341B60C2011/1286B60C2011/1209B60C11/125B60C11/124B60C11/24B60C11/0309B60C11/1236B60C2011/1213B60C2011/0383B60C11/1307B60C2011/133B60C2011/1338B60C11/12B60C11/11B60C2011/0346B60C2011/0381
Inventor 稻田雄太郎
Owner SUMITOMO RUBBER IND LTD
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