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Inflation tyre

A technology of pneumatic tires and tires, applied to tire parts, tire tread/tread pattern, transportation and packaging, etc., to achieve the effect of maintaining handling stability and improving snow performance

Active Publication Date: 2015-09-09
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, even in the pneumatic tire of Patent Document 1, further improvement is required for the balance between steering stability on dry roads and on-snow performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0068] Based on the specifications in Table 1, prototypes with figure 1 Pneumatic tires with basic pattern and size 215 / 60R16. As a comparative example, a tire without an intermediate tie was trial-manufactured. The handling stability, on-snow performance, and noise performance of each test tire on a dry road surface were tested. The general specifications and test methods of each test tire are as follows.

[0069] Mounting rim: 16×6.5J

[0070] Tire internal pressure: front wheel 210kPa, rear wheel 200kPa

[0071]

[0072] The steering stability when running on a circuit course on a dry road surface using the following test vehicles was evaluated by the driver's sensory experience. The test results are expressed by rating the results of the comparative example as 100, and the larger the numerical value, the better the steering stability.

[0073] Test Vehicle: Displacement 1800cc, front-wheel drive

[0074] Test tire installation position: all wheels

[0075]

[00...

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Abstract

The invention provides an inflation tyre which can maintain the stability on a drying ground while improving the performance on the snow. The surface of the inflation tyre is provided with a pair of tyre shoulder main groove (3) and a central groove (4); a central landing part (10) is obtained through dividing the central groove (4) and the tyre shoulder main grooves on the two sides of the tyre equator; a plurality of middle transverse grooves (11) are positioned in the middle terrene (10); a plurality of middle transverse grooves (11) extending in the inclination manner relative to the tyre axial direction; the middle transverse groove (11) has an external end communicating with the tyre shoulder main groove, and an internal end formed in the middle part of the middle terran part. The groove width of the outer end (12) increases gradually towards the outward of the tyre axial direction; and a middle drawing rib with the bottom of the groove being raised is arranged on the external

Description

technical field [0001] The present invention relates to a pneumatic tire that maintains handling stability on dry roads and improves performance on snow. Background technique [0002] Patent Document 1 below proposes a pneumatic tire in which the shape of a sipe provided in a tread portion and the width of a belt layer are improved. The aforementioned pneumatic tire suppresses the increase in the outer diameter of the tread portion due to filling the internal pressure, and maintains the width of the sipe substantially constant. Thus, the edge effect of the sipe is improved. [0003] Patent Document 1: Japanese Patent Laid-Open No. 2011-143891 [0004] However, even in the pneumatic tire of Patent Document 1, further improvement is required for the balance between steering stability on dry roads and on-snow performance. Contents of the invention [0005] A main object of the present invention is to provide a pneumatic tire which improves snow performance while maintainin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/12
CPCB60C11/1369
Inventor 菊池洋
Owner SUMITOMO RUBBER IND LTD
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