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Open AccessArticle

Real-time Energy Management Strategy for Oil-Electric-Liquid Hybrid System based on Lowest Instantaneous Energy Consumption Cost

by Yang Yang 1,2,*, Zhen Zhong 1,2, Fei Wang 1,2, Chunyun Fu 1,2 and Junzhang Liao 1,2
1
State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400044, China
2
School of Automotive Engineering, Chongqing University, Chongqing 400044, China
*
Author to whom correspondence should be addressed.
Energies 2020, 13(4), 784; https://doi.org/10.3390/en13040784 (registering DOI)
Received: 10 January 2020 / Revised: 4 February 2020 / Accepted: 8 February 2020 / Published: 11 February 2020
(This article belongs to the Special Issue Energy Storage Systems for Electric Vehicles)
For the oil–electric–hydraulic hybrid power system, a logic threshold energy management strategy based on the optimal working curve is proposed, and the optimal working curve in each mode is determined. A genetic algorithm is used to determine the optimal parameters. For driving conditions, a real-time energy management strategy based on the lowest instantaneous energy cost is proposed. For braking conditions and subject to the European Commission for Europe (ECE) regulations, a braking force distribution strategy based on hydraulic pumps/motors and supplemented by motors is proposed. A global optimization energy management strategy is used to evaluate the strategy. Simulation results show that the strategy can achieve the expected control target and save about 32.14% compared with the fuel consumption cost of the original model 100 km 8 L. Under the New European Driving Cycle (NEDC) working conditions, the energy-saving effect of this strategy is close to that of the global optimization energy management strategy and has obvious cost advantages. The system design and control strategy are validated. View Full-Text
Keywords: oil–electric–hydraulic hybrid system; lowest instantaneous energy costs; energy management; global optimization oil–electric–hydraulic hybrid system; lowest instantaneous energy costs; energy management; global optimization
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MDPI and ACS Style

Yang, Y.; Zhong, Z.; Wang, F.; Fu, C.; Liao, J. Real-time Energy Management Strategy for Oil-Electric-Liquid Hybrid System based on Lowest Instantaneous Energy Consumption Cost. Energies 2020, 13, 784.

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