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Pneumatic radial tire for use on passenger car

A technology for radial tires and passenger cars, applied in the reinforcement layers of pneumatic tires, tire parts, vehicle parts, etc., to achieve the effect of expanding the actual interval, improving durability, and reducing rolling resistance

Inactive Publication Date: 2012-12-12
THE YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, steel cords made of monofilaments have poor fatigue resistance against bending, so when such cords are used in belts, there is a problem that although rolling resistance can be reduced, pneumatic tires cannot be provided with sufficient durability.

Method used

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  • Pneumatic radial tire for use on passenger car
  • Pneumatic radial tire for use on passenger car
  • Pneumatic radial tire for use on passenger car

Examples

Experimental program
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Effect test

example

[0053] In a pneumatic tire with a tire size of 195 / 65R15, in terms of the belt layer, the number of layers of the belt layer, the arrangement of the belt cords, the structure, the strength, the amount of embedding, the number of embedding wires, and the diameter, in 20 The dynamic elastic modulus E' at ℃ and the setting of tanδ at 60℃ are shown in Tables 1 to 3, respectively. In terms of the belt auxiliary layer, the presence or absence of the belt auxiliary layer, the arrangement, and the belt auxiliary cord The structure, angle, arrangement form of the belt auxiliary layer, layer width, whether it overlaps with the position P, and the setting of the embedded number of belt auxiliary layer cords are shown in Tables 1 to 3, and thus manufactured Conventional Examples 1-2, Comparative Examples 1-4, and Examples 1-18 total 22 kinds of test tires.

[0054] Here, Conventional Examples 1 and 2 are tires without a belt auxiliary layer, the belt layer of Conventional Example 1 is com...

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Abstract

A pneumatic radial tire for use on passenger cars including two layers of a belt layer (10) formed from steel cords embedded at an angle from 15 DEG to 45 DEG with respect to a tire circumferential direction. The belt layers (10) are formed from steel cords formed from a non-twisted steel monofilament having a diameter from 0.27 mm to 0.45 mm. A belt auxiliary layer (20) formed from steel cords embedded at an angle from 80 DEG to 90 DEG with respect to the tire circumferential direction is provided between a carcass layer (4) and the belt layers (10). The invention provides a pneumatic tire which can maintain endurance of tire and reduce rolling resistance even if the belt layer is made of singles.

Description

technical field [0001] The present invention relates to a pneumatic radial tire for passenger vehicles, and more particularly, to a pneumatic radial tire for passenger vehicles capable of reducing rolling resistance while maintaining high durability. Background technique [0002] A pneumatic radial tire for passenger vehicles generally has a structure in which a bridging ply is installed between a pair of bead portions, the ply has a plurality of ply cords oriented in the radial direction of the tire, and the ply on the tread portion A belt layer including a plurality of steel cords inclined with respect to the tire circumferential direction is arranged on the outer peripheral side of the layer. At present, according to social requirements such as resource saving and energy saving, there is a strong demand for reducing vehicle fuel consumption for such pneumatic radial tires for passenger vehicles. Therefore, in recent years, the development of low fuel consumption tires wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C9/18B60C9/10B60C9/16
CPCB60C9/0064B60C9/2006B60C9/28B60C9/0007B60C2009/2041
Inventor 张替绅也
Owner THE YOKOHAMA RUBBER CO LTD
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