The development of hybrid electric vehicles is frequently discussed. Almost every car manufacturer has started mass production in the last years. Nevertheless, researchers all over the world are looking for a uniform procedure used for configuring the drive train at an early stage of the design process of HEVs. Therefore, the engineering of future HEVs requires extensive instruments for a premature and rough dimensioning of drive train components. This plays a decisive role especially for novel drive configurations like hybrid electric and pure electric drive trains as there are no adequate empirical values yet in this area. For instance, one pivotal question of preliminary design is the interdependent dimensioning of the internal combustion engine and the electrical machine. Concepts of downsizing and the search of the optimum hybridization factor are discussed at the moment. But there are still no proven results for the question what component sizes are optimal. Furthermore, the specifications of the energy storage influence the design process. The goal of this current work is to handle the preliminary dimensioning of electrified drive train components by means of a simulation tool taking certain constraints into account. The results were achieved within a perennial research project of BMW in collaboration with TUM (Munich University of Technology). In this work, a scalable full vehicle simulation system was modelled and programmed. The simulation is able to run several driving cycles and to calculate the vehicle's fuel consumption. Furthermore, the vehicle properties can be defined by the user as initial values. The scalable models are used as additional degrees of freedom during the drive train design process enabling a variation of size and technology of electrical machine, energy storage and internal combustion engine. Finally, the scalability of the full vehicle simulation is used by an optimization algorithm that outputs the optimum drive train configuration under the given constraints. Using the described tool, it is possible to get information about influences and trends during the design process of parallel hybrid electric vehicles very quickly. In doing so, the simulation system is a possible tool handling the preliminary design of electrified drive trains.
Drive train simulation and design using scalability and optimization
2010
15 Seiten, 12 Bilder, 14 Quellen
Aufsatz (Konferenz)
Datenträger
Englisch
Antriebsstrang , Hybridantrieb , Elektroantrieb , Dimensionierung , Verbrennungsmotor , Elektromotor , Energiespeicher , Optimierungsverfahren , Kraftfahrzeug , numerische Simulation , Modellsimulation , Fahrzyklus , Kraftstoffverbrauch , Berechnung , Skalierbarkeit , Optimierungsalgorithmus , Konfigurationsprogramm
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