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Pneumatic tires for passenger vehicles

A technology for pneumatic tires and vehicles, applied to the reinforcement layer of pneumatic tires, vehicle parts, tire parts, etc., can solve problems such as damage to steering stability, difference in steering force, oversteer, etc., to reduce load dependence, reduce The effect of small load dependencies

Inactive Publication Date: 2019-06-07
BRIDGESTONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the case of using such a reinforcement structure, there is a problem in load dependence so that a difference occurs in the degree of steering force obtained depending on the degree of tire load
For example, in the case of installing pneumatic tires with the aforementioned reinforced structure on a small FF vehicle, the load on the front wheels of this vehicle is very different from that on the rear wheels, and the steering force obtained on the front wheels is significantly greater than that obtained on the rear wheels. steering forces, so for example problems with oversteering and a tendency to destabilize the steering during cornering

Method used

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  • Pneumatic tires for passenger vehicles
  • Pneumatic tires for passenger vehicles
  • Pneumatic tires for passenger vehicles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] The tire of Example 1 has a tire size of 225 / 50R17, and includes a main belt formed of two inclined belt layers (first and second inclined belt layers) in which cords cross each other between layers, and set A reinforcing belt on the outer side of the main belt in the tire radial direction. In addition, the reinforcing belt is formed by a first circumferential belt layer and a pair of second circumferential belt layers, wherein the first circumferential belt layer is arranged across from the tire equatorial surface of the tread to the shoulder side. The second circumferential belt layer is provided on the outer side of the first circumferential belt layer in the tire radial direction, on shoulders on both sides of the tread portion in the tire width direction, and separated from each other. In addition, the thicknesses of the shoulder portions and the center portion between the cords of the two inclined belt layers are as shown in Table 1. Here, the coated rubber of eac...

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Abstract

It is an object of the present invention to provide a pneumatic tire for a passenger vehicle such that the load dependence of steering force can be sufficiently reduced. The pneumatic tire for passenger vehicles of the present invention has a tread portion on which a main belt is constructed, which includes at least two inclined belt layers, each of which is formed obliquely with respect to the tire circumferential direction. an extended rubber-coated cord layer; and a reinforcing belt disposed outside the main belt in the tire radial direction and including at least one circumferential belt layer formed by extending in the tire circumferential direction The rubber-coated cord layer is formed in which the main belt and the reinforcing belt are arranged to extend from the equatorial plane of the tire to the shoulder of the tread portion. The pneumatic tire for passenger vehicles is characterized in that the thickness between the cords of two adjacent inclined belt layers in the shoulder portion is larger than that in the center portion in the tread portion.

Description

Technical field [0001] The present invention relates to pneumatic tires for passenger vehicles. Background technique [0002] Generally, it is known to provide an inclined belt layer having cords inclined with respect to the tire circumferential direction on the outer side in the tire radial direction of the crown portion of the carcass spanning between the bead portions as a reinforcing member of the pneumatic tire. [0003] Specifically, generally, sufficient steering force, which is an important indicator of steering stability, has been obtained by ensuring the tire width direction rigidity of the inclined belt layer. [0004] However, in the case of using such a reinforcement structure, there is a problem in load dependence, so that the degree of steering force obtained according to the degree of tire load varies. For example, in the case of installing pneumatic tires with the aforementioned reinforcement structure on a small FF vehicle, the load on the front wheels of the vehic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C9/20B60C9/18
CPCB60C2009/2016B60C9/2009B60C2009/2038B60C9/22B60C2009/2019B60C2009/1842B60C9/185B60C9/18B60C9/20B60C15/06B60C2009/2012B60C2009/2032
Inventor 田代雄一
Owner BRIDGESTONE CORP
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