Evaluation of a Modified Equivalent Fuel-Consumption Minimization Strategy Considering Engine Start Frequency and Battery Parameters for a Plugin Hybrid Two-Wheeler

Naga Kavitha Kommuri, Andrew McGordon, Antony Allen and Dinh Quang Truong
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Naga Kavitha Kommuri: WMG, University of Warwick, Coventry CV4 7AL, UK
Andrew McGordon: WMG, University of Warwick, Coventry CV4 7AL, UK
Antony Allen: WMG, University of Warwick, Coventry CV4 7AL, UK
Dinh Quang Truong: WMG, University of Warwick, Coventry CV4 7AL, UK

Energies, 2020, vol. 13, issue 12, 1-26

Abstract: An appropriate energy management strategy is essential to enhance the performance of hybrid electric vehicles. A novel modified equivalent fuel-consumption minimization strategy (ECMS) is developed considering the engine operating point deviation from the optimum operating line. This paper focuses on an all-inclusive evaluation of this modified ECMS with other state-of-art energy management strategies concerning battery ageing, engine switching along with fuel economy and charge sustenance. The simulation-based results of a hybrid two-wheeler concept are analysed, which shows that the modified ECMS offers the highest benefit compared to rule-based controllers concerning fuel economy and reduction in engine switching events. However, the improvement in fuel economy using modified ECMS has significant negative potential effects on critical battery parameters influencing battery ageing. The results are analysed and found consistent for two different drive cycles and three different powertrain component configurations. The results show a significant reduction in fuel consumption of up to 21.18% and a reduction in engine switching events of up to 55% with modified ECMS when compared with rule-based strategies. However, there is a significant increase in battery temperature by 31% and battery throughput by 378%, which plays a major role in accelerating battery ageing. This paper emphasizes the need to consider battery-ageing parameters along with other control objectives for a robust assessment of energy management strategies. This study helps in laying down a foundation for future improvements in energy management development and it also aids in establishing a basis for comparing energy management controllers.

Keywords: parallel plugin hybrid; hybrid two-wheeler; load-levelling control (LLC); equivalent fuel-consumption minimization strategy (ECMS); battery ageing; fuel economy; engine switching and charge sustained (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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