Title: Modelling performance of ultracapacitor arrays in hybrid electric vehicles

Authors: Robert G. Wiegers, Donald M. Blackketter, Herbert L. Hess

Addresses: 7815 W Quail Ln, Wichita, KS 67212, USA. ' Department of Mechanical Engineering, University of Idaho, Moscow, ID 83844-0902, USA. ' Department of Electrical Engineering, University of Idaho, Moscow, ID 83844-1023, USA

Abstract: This paper describes the development of a computer model to model performance of ultracapacitor arrays in hybrid electric vehicles. A Power-Based Model (PBM) was created and the results were compared with data from the University of Idaho|s ultracapacitor hybrid Future Truck. The PBM accurately predicts vehicle fuel economy and allows quick simulation speed. This model includes a derived Internal Combustion (IC) engine fuel map with interpolation function and a random capacitance generator for balancing circuit implementation. Experimental data showed that the Future Truck averaged 15.9 mpg operating non-hybrid whereas the PBM predicted 16.8 mpg for a non-hybrid set-up over the same drive cycle, a 5% difference. PBM as shown can accurately predict the vehicle performance including the added benefits from implementing an ultracapacitor array and balancing circuits. Using PBM, it is seen that ultracapacitors are a viable energy storage solution for hybrid electric vehicles.

Keywords: hybrid electric vehicles; HEV; fuel economy; future trucks; ultracapacitors; balancing circuits; engine modelling; alternative propulsion; ultracapacitor array performance; simulation; vehicle performance; energy storage.

DOI: 10.1504/IJAP.2006.010756

International Journal of Alternative Propulsion, 2006 Vol.1 No.1, pp.32 - 46

Published online: 29 Aug 2006 *

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