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Pneumatic tire

A pneumatic tire and tire technology, applied in tire parts, tire tread/tread pattern, transportation and packaging, etc., can solve problems such as deterioration of driving performance, increase groove volume, improve snow column shear force, The effect of increasing the ground area

Inactive Publication Date: 2011-01-12
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when the groove area of ​​the tread portion is reduced in order to improve the performance on ice, there is a problem that the above-mentioned performance on snow, especially the driving performance on deep snow roads is significantly deteriorated.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0053] Manufactured according to the specifications in Table 1 with figure 1 A studless passenger car tire (size 195 / 65R15) with the tread pattern shown was tested for performance on ice as well as performance on snow. The main common specifications and test methods are as follows.

[0054]

[0055] Tread contact width TW: 168mm

[0056] Depth of inner longitudinal main groove: 9.0mm

[0057] Depth of outer longitudinal main groove: 9.0mm

[0058] Depth of central transverse groove: 9.0mm

[0059] The depth of the middle transverse groove: 9.0mm

[0060] Depth of shoulder transverse groove: 9.0mm

[0061]

[0062]Under the conditions of rim 15×6J and internal pressure 230kPa, each test tire was installed on all the wheels of a domestic FR car with a displacement of 2500cc, and after a test run of about 100km on a dry paved road, the test was carried out. Brake test on icy roads. In the braking test, the car was driven at a speed of 30 km / h on the test road, and the ...

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Abstract

The invention provides a pneumatic tire evenly improving the performances thereof on the snow and ice, which is characterized in that: at least four vertical main channels are positioned at a tire thread (2); each main channel is provided with a pair of inner vertical main channels (3a) and a pair of outer vertical main channels (3b); the pair of inner vertical main channels are positioned at thetwo sides of an equatorial line of the tire, and continuously extends along the circumference of the tire; the pair of outer vertical main channels are arranged outside the inner vertical main channels, and also continuously extends along the circumference of the tire; a cross part (7) for inner trenches in a shape of cross road and oppositely connected with cross trenches (4b, 4c) through one side of the equatorial line C as well as one side of a grounded part E of the tire respectively, is formed in the inner vertical main channel, and a cross part (8) for outer trenches in a shape of crossroad oppositely and connected with cross trenches (4b, 4c) through one side of the equatorial line C as well as one side of a grounded part E of the tire respectively, is formed in the inner verticalmain channel; trenches in the cross part (8) are wider than that in the cross part (7).

Description

technical field [0001] The present invention relates to a pneumatic tire capable of improving performance on snow and performance on ice in a balanced manner. Background technique [0002] Since the prohibition of the use of tires with punctures, the occurrence of slippery road surfaces covered with ice called mirror plates has increased in snowfall areas, centering on the urban areas. To improve the running performance on icy or snowy roads, such as winter tires, snow tires, or studless tires, in order to improve the running performance on such mirror plates, the groove area of ​​the tread portion is reduced and the ground contact with the road surface is increased. area, thereby increasing friction. [0003] On the other hand, in this type of tire, the snow on the road surface is hardened in the grooves of the tread portion to form a snow column, and the driving force on the snow is obtained by the reaction force when the snow column is sheared. Therefore, when the groov...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C11/117
Inventor 日野秀彦景山尚纪
Owner SUMITOMO RUBBER IND LTD
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