Tests of seventeen electric vehicles were analyzed to estimate tire friction, aerodynamic drag-area product, and average motor-driveline efficiency. The tests included coastdown runs, range over the SAE J227a driving schedules (B, C, and constant speed), and constant-current battery discharges. Analysis indicates that winds during coastdown tests resulted in average standard deviations of seven percent for tire friction, and fifteen percent for drag-area product. Motor-driveline efficiency estimates ranged from 40 percent to 93 percent (fifteen vehicles, J227a/B schedule), and from 61 percent to 93 percent (eleven vehicles, J227a/C schedule).


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    Title :

    Tire and aerodynamic friction and motor-driveline efficiency of electric vehicles from track tests


    Additional title:

    Reifenreibung, aerodynamische Reibung und Auswertung der verfuegbaren Batterieenergie elektrischer Fahrzeuge: Ergebnis einer Fahrpruefung


    Contributors:

    Published in:

    Publication date :

    1978


    Size :

    12 Seiten, 2 Bilder, 10 Tabellen, 8 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English






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