The paper describes the simulation of a bi-tensional (14 V / 42 V) hybrid vehicle. The focus is on gaining a better understanding of vehicle sub-system interaction through simulation. A systems viewpoint of the vehicle is necessary when optimizing for vehicle performance. Not only should the conflicting objectives of each sub-system be analyzed, but also the synergies to be gained should be exploited. This paper has shown that for an ISG (Integrated Starter Generator) vehicle one should pay particular attention to load management, motoring, energy storage, and stop/start strategies and their interactions. Accessory loads should be minimized by reducing parasitic accessory loads whenever possible. Electrically driven air conditioning compressors should be avoided or the engine should be left running with a mechanically driven compressor during vehicle stops. Energy storage capabilities and strategies play a crucial role in enabling new higher voltage technologies. Stop/Start operation should be used if engine frictional losses exceed the battery losses incurred during vehicle stops and subsequent recharging. If one is considering regenerative braking then the limitations imposed by the battery need to be taken into account. Torque boost, or monitoring with the ISG has a negative effect on fuel economy. Opportunities for further study would be to downsize the engine and utilize torque boost to meet the drive cycle requirements. A vehicle using a downsized engine and employing torque boost to meet drive cycle requirements would theoretically have a fuel economy benefit.


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    Title :

    Simulation of higher voltage vehicles to optimize performance


    Additional title:

    Simulation von Fahrzeugen mit höherer Bordnetzspannung


    Contributors:


    Publication date :

    2001


    Size :

    5 Seiten, 1 Bild, 1 Tabelle, 4 Quellen




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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