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pneumatic tire

A technology of pneumatic tires and tires, which is applied in the direction of off-road vehicle tires, tire parts, tire tread/tread pattern, etc., to achieve the effect of increasing land ratio, improving dry road performance and noise performance, and improving ride comfort performance

Active Publication Date: 2022-01-25
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the pneumatic tire of the above-mentioned Patent Document 1, in addition to dry road performance, mud performance, and noise performance, when wet road performance, snow performance, and ride comfort performance were evaluated, there was room for further improvement.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0086] Made with figure 1 Pneumatic tires (size: 275 / 65R18) with a tread pattern based on the specifications in Table 1, and their dry road performance, wet road performance, mud performance, snow performance, ride comfort performance and noise performance were tested. Common specifications and test methods of the test tires are as follows.

[0087]

[0088] Mounting rim: 18×8.0J

[0089] Tire internal pressure: 230kPa

[0090] Test Vehicle: Small Truck

[0091] Riding conditions: 1 test driver and 1 passenger, a total of 2 passengers

[0092]

[0093] A test vehicle in which the test tires were mounted on all the wheels was run on a dry paved test road, and the grip performance at that time was evaluated by the senses of the test driver. The evaluation is represented by an index of 100 in Comparative Example 1, and the larger the numerical value, the better.

[0094]

[0095] Using the test vehicle with the test tires mounted on all the wheels, the vehicle was run ...

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Abstract

The present invention provides a pneumatic tire in which on-road performance, off-road performance, riding comfort performance, and noise performance are improved in a balanced manner. The pneumatic tire (1) of the present invention is provided with a plurality of main grooves (3) extending continuously in a zigzag shape in the tire circumferential direction and a plurality of lateral grooves (4) extending in the tire axial direction on the tread portion (2). . The main groove (3) includes a pair of shoulder main grooves (6) arranged on both sides of the tire equator C. The lateral grooves (4) include a plurality of shoulder lateral grooves (17) extending from each shoulder main groove (6) to a tread end (Te) on the tire axially outer side. The maximum groove width W8 of the shoulder transverse groove (17) is 0.2-0.6 times of the maximum groove width W1 of the shoulder main groove (6).

Description

technical field [0001] The present invention relates to a pneumatic tire which improves road performance, off-road performance, riding comfort performance and noise performance in a balanced manner. Background technique [0002] Conventionally, as pneumatic tires for vehicles (such as SUVs, four-wheel drive vehicles, etc.) intended to run on paved roads and uneven roads, road performance on paved roads and off-road performance on uneven roads are required. Take care. Road performance includes, for example, dry road performance and wet road performance. In addition, off-road performance includes, for example, mud performance and snow performance. Furthermore, in recent years, such pneumatic tires have been required to have high ride comfort performance and noise performance on paved roads, and it is necessary to improve each required performance in a balanced manner. [0003] For example, Patent Document 1 below proposes a pneumatic tire in which dry performance, mud perfo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C11/03B60C11/11
CPCB60C11/0306B60C11/11B60C2011/036B60C2011/0353B60C2011/1209B60C2011/0381B60C2011/0346B60C2011/0365B60C2200/14B60C11/0304
Inventor 村田雄彦
Owner SUMITOMO RUBBER IND LTD
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