A Supervisory Control Algorithm of Hybrid Electric Vehicle Based on Adaptive Equivalent Consumption Minimization Strategy with Fuzzy PI

Fengqi Zhang, Haiou Liu, Yuhui Hu and Junqiang Xi
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Fengqi Zhang: School of Mechanical and Precision Instrument Engineering, Xi’an University of Technology, Xi’an 710000, China
Haiou Liu: School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
Yuhui Hu: School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
Junqiang Xi: School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China

Energies, 2016, vol. 9, issue 11, 1-26

Abstract: This paper presents a new energy management system based on equivalent consumption minimization strategy (ECMS) for hybrid electric vehicles. The aim is to enhance fuel economy and impose state of charge ( SoC ) charge-sustainability. First, the relationship between the equivalent factor (EF) of ECMS and the co-state of pontryagin’s minimum principle (PMP) is derived. Second, a new method of implementing the adaptation law using fuzzy proportional plus integral (PI) controller is developed to adjust EF for ECMS in real-time. This adaptation law is more robust than one with constant EF due to the variation of EF as well as driving cycle. Finally, simulations for two driving cycles using ECMS are conducted as opposed to the commonly used rule-based (RB) control strategy, indicating that the proposed adaptation law can provide a promising blend in terms of fuel economy and charge-sustainability. The results confirm that ECMS with Fuzzy PI adaptation law is more robust than ECMS with constant EF as well as PI adaptation law and it achieves significant improvements compared with RB in terms of fuel economy, which is enhanced by 4.44% and 14.7% for china city bus cycle and economic commission of Europe (ECE) cycle, respectively.

Keywords: hybrid electric vehicle; equivalent consumption minimization strategy; equivalent factor; fuzzy proportional plus integral (PI) (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: 2016
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (11)

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