Fuel efﬁciency optimization methodologies for series hybrid electric vehicles

Lot, Roberto, Evangelou, Simos A. and Chen, Boli (2018) Fuel efﬁciency optimization methodologies for series hybrid electric vehicles. In 2018 IEEE Vehicle Power and Propulsion Conference, VPPC 2018 - Proceedings. pp. 1-6 . (In Press)

Record type: Conference or Workshop Item (Paper)

Abstract

— This paper provides an overview of various optimization formulations that can lead to improved fuel economy for a series hybrid electric vehicle (HEV). The relevance and improvement to the current state-of-the-art are discussed. The
formulated optimal control problems (OCP) consist of two individual optimization challenges: vehicle speed optimization and powertrain power-split optimization. These OCPs can be merged leading to a practical and global problem, where all the aspects are optimized simultaneously for a prescribed route and traveling time. Alternatively, the global problem can be approximated by solving individual OCPs, one for each aspect, in steps and combined a posteriori. The optimal solutions in each case are investigated and compared by simulation examples to expose the trade-off between optimality of fuel
economy achieved by global optimization and reduction in computational complexity and hence practicality of the twostep solution approximation.

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