To simply evaluate wet performance at a low temperature environment.SOLUTION: At first temperature 0 to 10°C and second temperature 20 to 40°C, fluorescent liquid 34 is mediated between a transparent plate 32 and a tread land 20 with an uneven surface 32A equivalent to a real road surface, and the tread land 20 is contacted on an uneven surface 32. An excitation light is irradiated to the fluorescent liquid 34, brightness distribution of fluorescence emitted by the fluorescent liquid 34 is measured, and a contact area of the tread land 20 relative to the uneven surface 32 is measured. Wet performance of a tire in a low temperature environment is evaluated on the basis of ratio of a contact area AL measured at the first temperature to a contact area AH measured at the second temperature.SELECTED DRAWING: Figure 3
【課題】低温環境でのウェット性能を簡便に評価する。【解決手段】0~10℃の第1温度と20~40℃の第2温度とのそれぞれにおいて、実路面相当の凹凸面32Aを持つ透明板32とトレッド陸20との間に蛍光液34を介在させて凹凸面32にトレッド陸20を接地させる。蛍光液34に励起光を照射し、蛍光液34から放出された蛍光の輝度分布を測定して、凹凸面32に対するトレッド陸20の接地面積を測定する。第1温度で測定した接地面積ALと第2温度で測定した接地面積とAHの比に基づいて低温環境でのタイヤのウェット性能を評価する。【選択図】図3
TIRE PERFORMANCE EVALUATION METHOD AND TIRE DESIGN METHOD
タイヤ性能評価方法及びタイヤの設計方法
2024-01-10
Patent
Electronic Resource
Japanese
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