Vehicular different diameter wheel judging device



PROBLEM TO BE SOLVED: To prevent the mis-judge of a different diameter wheel by detecting the continuing time in which the difference of both wheel speed is more than a prescribed value by a first detection means, the continuing time in which the difference is below a prescribed value by a second detection means and carrying out the different diameter wheel judgement or the different diameter wheel judgement release when the first/ second detection means reach respective judgement standard time. SOLUTION: A different shape type mounting judgement is concluded and a signal for showing the mounting of the different iameter wheel is outputted, when the wheel speed difference of respective wheels calculated by wheel speed sensors 13... is more than a prescribed value and the count value of a different shape tyre mounting judgement counter 5 is more than a first prescribed value. When the wheel speed difference is below a prescribed value and the count value of a four wheel normal judgement counter 6 is more than a second prescribed value, a signal for showing a normal four wheel is outputted by no existence of the different diameter wheel. In this case, the first/second prescribed values are corresponded to a first/second judgement standard time respectively and it is set to the first prescribed value >= the second prescribed value. As this result, the main cause of misjudgement generated unexpectedly and settled at a short time is eliminated.
(57)【要約】 【課題】 異径輪の誤判定を可及的に防止し信頼性の高 い異径輪判定を行う。 【解決手段】 異径輪判定の基準となる第1判定基準時 間よりも異径輪判定解除の基準となる第2判定基準時間 を短く設定する。かかる構成とすることで、異径輪判定 と異径輪判定解除の間においては、判定基準時間が短い 分だけ異径輪判定解除(即ち、四輪が正常であるとの判 定)が異径輪判定よりも早い段階でなされ易く、それだ け異径輪判定の機会が少なくなる。また、例え異径輪の 誤判定の原因となる現象が生じたとしても、異径輪判定 はその判定基準時間が長い分だけこれが実際に異径輪と して誤判定される以前に該現象が消滅して誤判定が回避 されることになる。これらの相乗効果として、異径輪の 誤判定が可及的に防止される。




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    JP-2007030749-AFebruary 08, 2007Honda Motor Co Ltd, Nissin Kogyo Co Ltd, 日信工業株式会社, 本田技研工業株式会社Differential diameter rate calculating method for wheel, and differential diameter rate calculating device
    JP-4580302-B2November 10, 2010日信工業株式会社, 本田技研工業株式会社車輪の異径率計算方法および異径率計算装置