In this paper we present an extension of the tank-to-wheel efficiency for hybrid electric vehicles. The energy at the wheel is split into dissipative energy and circulating energy. Instead of using one lumped tank-to-wheel efficiency, we use fuel-to-traction efficiency and recuperation efficiency. We further show that for a hybrid electric vehicle, fuel-to-traction efficiency and recuperation efficiency are almost constant and independent of the driving cycle. This fact makes our approach well suited for the estimation of the needed fuel energy for hybrid electric vehicles. The analysis of the simulation results has shown that both the fuel-to-traction efficiency (ηft and the recuperation efficiency (ηr) are almost constant over the driving cycles investigated if the hybridization ratio is sufficiently large. The fuel-to-traction efficiency is not only constant, it also closely approaches the maximum efficiency of the engine. In contrast to these results, both the fuel energy (Ef) and the TTW efficiency (ηtw.) are strongly dependent on the driving cycle because the energy demands Ediss and Ecirc are strongly dependent on the driving cycle. The constant efficiencies (ηft, ηr) and the simple calculation of the energy demands (Ediss, Ecirc) make our approach well suited to estimate the needed fuel energy for hybrid electric vehicles.


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    Title :

    Cycle-averaged efficiency of hybrid electric vehicles


    Contributors:


    Publication date :

    2013


    Size :

    9 Seiten, 6 Bilder, 3 Tabellen, 24 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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