As part of an ongoing vehicle benchmarking effort at Argonne National Laboratory, four different power-split HEVs were tested on a chassis dynamometer to analyze their operational behavior and understand the control strategy and its relationship to the individual features of the vehicles tested. The controls that select the way in which engine operation matches best engine efficiency load points appears to have evolved From the Gen 1 to the Gen 2 Toyota Prius. The Ford Escape HEV and Lexus RX400h were also analyzed by using similar methods, although the data are not as extensive as those for the Prius hybrids. Whereas the Escape HEV appeared to operate in a manner similar to that of the Gen 1 Prius, the RX400h (with its relatively large engine) loads the engine with excess battery charge to keep it operating at higher power levels - apparently to improve overall efficiency. The data that illustrate this information can be combined into novel, multi-axis graphs that describe the underlying nature of the acceleration and braking controls and their relationship to component size and the origin of efficiency gains.


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    Title :

    Analysis of Power-Split HEV Control Strategies Using Data from Several Vehicles


    Additional title:

    Sae Technical Papers


    Contributors:
    Lohse-Busch, H. (author) / Duoba, M. (author) / Carlson, R. (author) / Gurski, S. (author) / Bohn, T. (author)

    Conference:

    SAE World Congress & Exhibition ; 2007



    Publication date :

    2007-04-16




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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