Pneumatic tire

一种充气轮胎、轮胎的技术，应用在轮胎零部件、胎沿、车轮等方向，能够解决驾驶舒适度变差、垂直刚度常数上升等问题，达到不降低驾驶舒适度、提高操控稳定性的效果

Inactive Publication Date: 2005-09-28
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has a problem that the vertical spring constant rises and the driving comfort becomes worse

Method used

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  • Pneumatic tire
  • Pneumatic tire
  • Pneumatic tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0042] Based on the specifications shown in Table 1, will have as figure 1 A passenger car tire with the structure shown and the tire size of 215 / 40R17 was used as a sample. The handling stability and driving comfort of the sample tires were tested and compared with each other. The specifications are the same except as shown in Table 1. The rim used here is a standard rim (17×7.5JJ) in the JATMA standard, the height hc of the vertical surface portion Rf1 in the rim surface Rf is 9.0 mm, and the curvature radius of the curved surface portion Rf2 is 9.0 mm.

[0043] (1) Handling stability and driving comfort

[0044] The sample tires were fitted to four wheels of a car (2000cc, FR car) having a rim (17×7.5JJ) with an internal pressure of 230 kPa, and the car was run on an ordinary road and a circular track with a dry asphalt surface. Rely on the sensory evaluation of the driver, define 6 as a benchmark with the numerical value of the traditional embodiment, and control stabi...

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PUM

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Abstract

A bead portion 4 of a pneumatic tire 1 includes a vertical rising surface portion which is connected to a bead base surface Sb through an arc bead heel surface Sh, and a straight or convex arc flange receiving surface portion Sw 2 which is diagonally extending from the rising surface portion radially outward and axially outward of the tire. In a normal internal pressure in which no load is applied, the flange receiving surface portion Sw 2 is not in contact with a flange surface Rf, and in a load state in which 50% or more of normal load is applied, the flange receiving surface portion Sw comes into contact with the flange surface Rf.

Description

technical field [0001] The present invention relates to a pneumatic tire whose handling stability is improved without reducing driving comfort when it is applied to a state with a heavy load such as high-speed cornering. Background technique [0002] In conventional pneumatic tires, as indicated Figure 5 As shown, the cross-sectional shape of the bead portion a is made to match the cross-sectional shape of the inner surface of the rim R. More specifically, the outer wall surface Sw of the bead portion a supported by the flange surface Rf of the rim R includes a vertically rising surface portion s1 rising along the heel surface Sh, and an outer end of the rising surface portion s1 A concavely arcuate surface s2 extending in a concavely arcuate form. The radial height ja of the rising surface portion s1 along the bead base line BL is substantially equal to the height jf of the vertical surface portion Rf1 in the rim surface Rf, and the radius o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C15/00B60C15/024
CPCB60C15/024Y10T152/10819
Inventor 吉中伸好
Owner SUMITOMO RUBBER IND LTD
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