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The Scientific World Journal
Volume 2013 (2013), Article ID 560694, 12 pages
Research Article

Energy-Saving Analysis of Hydraulic Hybrid Excavator Based on Common Pressure Rail

1School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150080, China
2College of Automation, Harbin Engineering University, Harbin 150001, China
3Faculty of Technology and Science, University of Agder, 4898 Grimstad, Norway

Received 3 July 2013; Accepted 25 August 2013

Academic Editors: C.-M. Kao, M.-H. Shih, W.-P. Sung, and D. Tsang

Copyright © 2013 Wei Shen et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Energy-saving research of excavators is becoming one hot topic due to the increasing energy crisis and environmental deterioration recently. Hydraulic hybrid excavator based on common pressure rail (HHEC) provides an alternative with electric hybrid excavator because it has high power density and environment friendly and easy to modify based on the existing manufacture process. This paper is focused on the fuel consumption of HHEC and the actuator dynamic response to assure that the new system can save energy without sacrificing performance. Firstly, we introduce the basic principle of HHEC; then, the sizing process is presented; furthermore, the modeling period which combined mathematical analysis and experiment identification is listed. Finally, simulation results show that HHEC has a fast dynamic response which can be accepted in engineering and the fuel consumption can be reduced 21% to compare the original LS excavator and even 32% after adopting another smaller engine.