To provide an evaluation method of a tire ground contact state during traveling on a wet road surface below the freezing point.SOLUTION: A tire ground contact state evaluation method comprises the steps of: making a rubber test piece contact through fluorescent liquid A with a ground plane arranged on one surface of a transparent plate, which has irregularity corresponding to an actual road surface; and measuring brightness distribution of fluorescence emitted from the fluorescent liquid A by irradiating the fluorescent liquid A lying between the ground plane and the rubber test piece with exciting light from the opposite side to the ground plane of the transparent plate. The fluorescent liquid A contains an antifreezing agent which is water soluble below the freezing point and non-volatile in addition to water soluble fluorescence agent.SELECTED DRAWING: Figure 1
【課題】氷点下において、湿潤路面における走行時のタイヤ接地状態を評価する方法を提供する。【解決手段】透明板の一方の面に設けた実路面相当の凹凸を有する接地面に、蛍光液Aを介在させてゴム試験片を接地させる工程と、透明板の接地面とは反対側から、接地面とゴム試験片との間に介在する上記蛍光液Aに対して励起光を照射し、上記蛍光液Aから放出された蛍光の輝度分布を測定する工程とを有し、上記蛍光液Aは、水溶性の蛍光剤に加えて、氷点下において水溶性で、かつ不揮発性の不凍剤を含有する、タイヤ接地状態測定方法とする。【選択図】図1
TIRE GROUND CONTACT STATE EVALUATION METHOD
タイヤ接地状態評価方法
2023-05-10
Patent
Electronic Resource
Japanese
European Patent Office | 2021
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