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tire

A tire and tire circumferential technology, applied to tire parts, tire tread/tread pattern, vehicle parts, etc., can solve the problems of poor handling stability and reduced rigidity of land parts, and achieve improved handling stability, The effect of improving performance on ice and snow roads

Active Publication Date: 2022-02-25
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such a method has problems in that the rigidity of the land portion is lowered and the handling stability performance on a dry road surface is deteriorated.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0093] Prototyped according to the specifications in Table 1 with figure 1 The tires with the size of 205 / 65R16 of the basic pattern were tested, and the ice and snow road performance, the handling stability performance on the dry road surface and the partial wear resistance performance of each tire were tested. The main common specifications and test methods of each test tire are as follows.

[0094] The height of each main groove: 10mm

[0095] Tread contact width TW: 176mm

[0096]

[0097] Each test tire was mounted on all the wheels of a four-wheel drive vehicle with a displacement of 3600 cc under the following conditions. Furthermore, a test driver drives a test route on an icy and snowy road and a dry asphalt road, and evaluates the driving characteristics of traction, driving stability, and cornering performance at this time through the test driver's senses. The results are shown with a score of 100 for Comparative Example 1. The larger the numerical value, the ...

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PUM

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Abstract

The present invention provides a tire that maintains handling stability on dry roads and improves performance on icy and snowy roads. The tire is provided with a shoulder land portion (3), a middle land portion (4) on the tread portion (2), and a longitudinal tire extending in the tire circumferential direction between the shoulder land portion (3) and the middle land portion (4). A tire (1) with a narrow groove (10). A plurality of middle sipes (11) having an angle α with respect to the tire axial direction are provided on the middle land portion (4). A plurality of shoulder sipes (13) are provided on the shoulder land portion (3). The shoulder sipe (13) has an inner inclined portion (15) inclined with respect to the tire axial direction at an angle β larger than the angle α of the middle sipe (11) on the narrow longitudinal groove (10) side.

Description

technical field [0001] The present invention relates to tires, and specifically relates to tires suitable for running on ice and snow roads. Background technique [0002] For example, various types of tires have been proposed for running on packed snow roads and icy roads (hereinafter, these roads may be collectively referred to as “ice and snow roads”). A narrow slit-shaped sipe is formed on each land portion of such a tire. Such tires utilize sipe edges to improve friction against snow and ice. [0003] In order to improve running performance on ice and snow (hereinafter, sometimes referred to as "ice and snow performance"), it is conceivable to increase the number of sipes. However, such a method has problems in that the rigidity of the land portion decreases and the steering stability performance on a dry road surface deteriorates. [0004] Patent Document 1: Japanese Patent Laid-Open No. 2011-42328 Contents of the invention [0005] The present invention has been ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C11/04B60C11/12
CPCB60C11/04B60C11/12B60C11/0306B60C11/1369B60C2011/0346B60C2011/1213B60C2011/0348B60C11/1236B60C2011/0374B60C2011/1268
Inventor 柴田光俊
Owner SUMITOMO RUBBER IND LTD
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