Inflatable car radial tire with low-rolling resistance tread contour

A technology for radial tires and tread profiles, applied to tire treads/tread patterns, special tires, tire parts, etc., can solve problems such as loss, reduce tire rolling resistance, reduce deformation, and reduce tire rolling resistance Effect

Active Publication Date: 2015-11-18
GITI RADIAL TIRE (ANHUI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Simply reducing rolling resistance is not difficult, but reducing rolling resistance will always sacrifice some performance of the tire. Among the three major performances of tires: wear resistance, rolling r

Method used

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  • Inflatable car radial tire with low-rolling resistance tread contour
  • Inflatable car radial tire with low-rolling resistance tread contour
  • Inflatable car radial tire with low-rolling resistance tread contour

Examples

Experimental program
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Embodiment Construction

[0015] A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0016] figure 1 A sectional view in the direction of the tire meridian of the pneumatic passenger car radial tire of the present invention is shown. The reference sign CL is the equatorial plane of the tire, the reference sign L is the arc formed by connecting the bottom of the main groove, and TDW is the tread width.

[0017] The tire 10 includes a carcass 20 and a tread 30 arranged on the radially outer periphery of the carcass. The tread 30 includes the flattest crown part 31 in the middle and shoulder parts 32 arranged on both sides of the crown part. The crown portion has a smooth transition to the shoulder portion.

[0018] The shoulder portion 32 has a tread end P. In the structure having a square shoulder portion, the tread end P refers to a point on the edge of the shoulder portion. Since the shoulder portion is square, the tread T...

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PUM

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Abstract

The invention provides an inflatable car radial tire with a low-rolling resistance tread contour. Under the condition that other properties of the tire are not reduced, the purposes of improving the grounding condition, improving the deformation when the tire is in contact with the ground as well as reducing the tire rolling resistance are achieved by improving and controlling the tire tread contour shape. The tire comprises a tread, and the contour of the tread is sequentially divided into a first-section crown arc and a second-section crown arc on a tire radial section from the intersection of a tire equatorial plane and a tire tread contour to a tire crown at the starting part of a tire shoulder; the outer diameter R1 of the first-section crown arc, the outer diameter R2 of the second-section crown arc and the outer diameter R3 of the tire tread contour at the tire shoulder have the following relationship: 0.43<=R1/R2<=1 and 0.43<=R2/R3<=1; and the arc length alpha of the first-section crown arc, the arc length beta of the second-section crown arc and the tread width TDW have the following relationship: 0.33<=alpha/beta<=3 and 0.11<=beta/TDW<=0.431. According to the invention, by controlling smooth transition from the tire crown to the tire shoulder, the uniform distribution of stress in the tire grounding process is ensured, the horizontal and longitudinal deformation of the tire in a running process is reduced, and the tire rolling resistance is reduced.

Description

technical field [0001] The invention relates to the technical field of pneumatic tires, in particular to a pneumatic car radial tire capable of reducing rolling resistance and having an improved tread profile. Background technique [0002] Passenger car tire cavities are generally designed with a profile to give the finished tire a three-radius crown area, starting from the centerline with the first radius having the highest value to form the flattest radial tread area in the finished tire, No. Two radii make it possible to achieve the required mold profile drop at the start of the cavity shoulder radius, the second radius has a value between the first radius and a third radius, the third radius being the shoulder radius and allowing a The edge of the progressive ground contact footprint joins a crown area that connects to the sidewall of the tire. [0003] The rolling resistance of a tire, or rolling resistance, is the loss of efficiency due to the elasticity of the tire. ...

Claims

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Application Information

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IPC IPC(8): B60C3/04
CPCB60C11/0083Y02T10/86
Inventor 甄素霞李松马大竞
Owner GITI RADIAL TIRE (ANHUI) CO LTD
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