Journal of South China University of Technology (Natural Science Edition) ›› 2014, Vol. 42 ›› Issue (9): 134-139.doi: 10.3969/j.issn.1000-565X.2014.09.023

• Automotive Engineering • Previous Articles     Next Articles

A Series- Parallel Hydraulic Hybrid System and Its Control Strategy

Luo Nian- ning1 Zhao Li- jun1 Jiang Ji- hai2 Zhang Jian2 Yu An- cai3   

  1. 1.School of Automotive Engineering,Harbin Institute of Technology,Weihai 264209,Shandong,China;2.School of Mechatronics Engineering,Harbin Institute of Technology,Harbin 150001,Heilongjiang,China;3.Tianjin Research Institute of Construction Machinery,Tianjin 300409,China
  • Received:2014-03-21 Revised:2014-06-01 Online:2014-09-25 Published:2014-08-01
  • Contact: 罗念宁(1969-)，男，在职博士生，高级工程师，主要从事混合动力技术研究． E-mail:luo@hit.edu.cn
  • About author:罗念宁(1969-)，男，在职博士生，高级工程师，主要从事混合动力技术研究．
  • Supported by:

    国家自然科学基金资助项目(51275123);威海市科技发展计划项目(2012DXGJ13)

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Abstract:

The whole vehicle performance depends on the topological structure and the control strategy of hybridpower system.In this paper,a series- parallel hydraulic hybrid system is proposed on the basis of ground torquecoupling mode.This kind of hydraulic hybrid system is suitable for the working condition of urban public traffic.Inorder to meet the instantaneous power requirement of vehicles and achieve the optimal global economy,an energymanagement strategy is proposed for the whole vehicle.Then,to simplify the system structure,the progressivelyhierarchical control method is adopted according to the hybrid system theory.Finally,through the Matlab/Simu-link/Statflow co- simulation,a forward model of the whole vehicle is established and the fuel economy and thedynamic performance of a whole vehicle are analyzed under the ECE city driving cycle.The results show that theproposed system and strategy can significantly improve the engine output characteristic and effectively increase thefuel economy and the instantaneous dynamic performance of the whole vehicle.

Key words: hydraulic hybrid, control strategy, city bus, multilevel hierarchical control, simulation modeling