This study focused on the series hybrid electric vehicle (SHEV) of mechanical separation of the engine and axle, which facilitates operation in the range of electricity generation. In this way, the authors created a system that significantly improves fuel economy without sacrificing vehicle dynamic performance, and achieved the following results: (1) The E/S power requirement was reduced and at the same time the energy transfer efficiency was improved by performing real-time generating without surplus or deficit with respect to motor power. This resulted in an E/S weight reduction of 62.5 % and achieved an energy transfer efficiency of 80 % in the 10-15 mode. (2) The energy transfer efficiency was raised and generating was carried out so as to constantly minimize the engine BSFC by means of real-time generating control and BSFC bottom trace control. This resulted in fuel efficiency improvement effects of 16.7 % in the 10-15 mode relative to the comparison vehicle. (3) Additional fuel efficiency improvements effects of 32.9 % to (2) above were obtained by implementing interval power control and stopping the engine in the low power range where engine efficiency is poor. (4) A further 25.3 % improvement in fuel efficiency relative to (3) above, ultimately reaching 23.3 km/l, was achieved by recovering deceleration energy. This represents a fuel efficiency improvement effect of 94.2 % relative to the comparison vehicle.


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    Title :

    Energy efficiency improvement of series hybrid vehicle


    Additional title:

    Verbesserung des energetischen Wirkungsgrades von Serienhybrid-Fahrzeugen


    Contributors:
    Aoyagi, S. (author) / Hasegawa, Y. (author) / Yonekura, T. (author) / Abe, H. (author)

    Published in:

    JSAE Review ; 22 , 3 ; 259-264


    Publication date :

    2001


    Size :

    6 Seiten, 9 Bilder, 1 Tabelle, 7 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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