PROBLEM TO BE SOLVED: To improve replacement necessity determination device for a snap-in-valve to the inner end of which an air pressure detection device with an air pressure sensor and an acceleration sensor are connected.SOLUTION: On the basis of rotational speed of a wheel 22 and acceleration G detected by an acceleration sensor, a control device 14 for a replacement necessity determination device 10 estimates an amounts θ of changes in angle of a snap-in-valve and air pressure detection device relative to the wheel 22, resulting from centrifugal force. On the basis of the maximum value θmax of an amount of change in angle for a preset time, a deterioration index value Id of an elastic body 18 of the snap-in-valve is calculated, and the necessity of replacement of the snap-in-valve 12 is determined on the basis of the integrated value Idin of deterioration index values.SELECTED DRAWING: Figure 1

    【課題】空気圧センサ及び加速度センサを有する空気圧検出装置が内端に連結されたスナップインバルブの交換要否判定装置の改良に関する。【解決手段】交換要否判定装置10の制御装置14は、ホイール22の回転速度及び加速度センサにより検出される加速度Gに基づいて、遠心力に起因するホイール22に対するスナップインバルブ及び空気圧検出装置の角度変化量θを推定し、予め設定された時間における角度変化量の最大値θmaxに基づいて、スナップインバルブの弾性体18の劣化指標値Idを演算し、劣化指標値の積算値Idinに基づいてスナップインバルブ12の交換の要否を判定する。【選択図】図1


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    Title :

    SNAP-IN-VALVE REPLACEMENT NECESSITY DETERMINATION DEVICE


    Additional title:

    スナップインバルブの交換要否判定装置


    Contributors:
    TAKI YUJI (author)

    Publication date :

    2017-08-31


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B60C VEHICLE TYRES , Fahrzeugreifen



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