Comparative assessment of ultra-capacitors and advanced battery energy storage systems in PowerSplit electronic-CVT vehicle powertrains

Le résumé fourni par la source

The power split architecture has become the dejure "gold standard" of hybrid propulsion systems because the global OEM's have converged to the electronic-continuously variable transmission, or e-CVT in two different configurations. For Toyota and Ford the single epicyclic gear set, THS and FHS respectively e-CVT. For GM-Allison and others to the dual epicyclic gear set, AHS designs possessing 2-modes of operation. Regardless of architecture, power split transmissions require a pair of electric motor-generators in order to deliver their intended function. The power electronic architecture for the Toyota hybrid system, THS can be in either a battery unbuffered THS-I or battery buffered via a buck/boost converter as in THS-II. The GM-Allison advanced hybrid system, AHS is configured as a battery unbuffered configuration, but it could also be realized using the battery buffered configuration. Benefits of ultra-capacitor augmentation of the energy storage system in both unbuffered and buffered configurations are investigated

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