PROBLEM TO BE SOLVED: To highly accurately calculate travel resistance of a vehicle within a wide travel speed range of the vehicle.SOLUTION: The travel resistance calculation device acquires a time series data of vehicle speeds with respect to coasting travel lapse time when a vehicle coastingly travels on a same road surface according to a plurality of speed conditions with different travel speed ranges, the speed conditions being defined by an approach speed and a lower limit speed. Subsequently, the travel resistance calculation device calculates at least travel resistance of the vehicle from the time series data of the respective speed conditions by using a motion equation of the vehicle in which external force applied to the vehicle is represented by a function equation of the vehicle speeds. Then, the time series data of the vehicle speeds under all the speed conditions are fitted to a general solution of the vehicle speed of the motion equation, with a time shift quantity and a coefficient in the function equation defined as parameters whose values are unknown, the time shift quantity for shifting the coasting travel lapse time for collecting the time series data under the respective speed conditions into one time series data, so as to acquire the values of the parameters, thereby calculating the travel resistance.SELECTED DRAWING: Figure 4

    【課題】幅広い車両の走行速度範囲で、車両の走行抵抗を精度良く算出する。【解決手段】走行抵抗算出装置は、車両の進入速度と下限速度から定まる走行速度範囲が互いに異なる複数の速度条件にしたがって、同じ路面上に車両を惰行走行させたときの惰行走行経過時間に対する車両速度の時系列データを取得する。この後、走行抵抗算出装置は、前記車両に作用する外力が車両速度の関数式で表された車両の運動方式を用いて、各速度条件の時系列データから、少なくとも車両の走行抵抗を算出する。このとき、各速度条件下の時系列データを1つの時系列データに纏めるために前記惰行走行経過時間をシフトする時間シフト量と、前記関数式中の係数と、を値が未知であるパラメータとして、全ての速度条件における前記車両速度の時系列データを、前記運動方程式の車両速度の一般解へフィッティングすることにより、前記パラメータの値を求めて前記走行抵抗を算出する。【選択図】 図4


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    Title :

    TRAVEL RESISTANCE CALCULATION METHOD, TRAVEL RESISTANCE MEASURING METHOD, AND TRAVEL RESISTANCE CALCULATION DEVICE


    Additional title:

    走行抵抗算出方法、走行抵抗計測方法、及び走行抵抗算出装置


    Contributors:
    KODAMA YUJI (author)

    Publication date :

    2016-05-23


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    G01M TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES , Prüfen der statischen oder dynamischen Massenverteilung rotierender Teile von Maschinen oder Konstruktionen / B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion




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