This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Swing Energy Recuperation Scheme for Hydraulic Excavators
ISSN: 0148-7191, e-ISSN: 2688-3627
Published September 30, 2014 by SAE International in United States
Annotation ability available
Due to the high demand of fuel efficient construction equipment, significant research effort has been dedicated to improving excavator efficiency. Among various possibilities, methods to recuperate energy during cab swing motion have been widely examined. Electric and hydraulic hybrids designs have shown to greatly improve fuel efficiency but require drastic design changes. The redesigned systems thus require many hours of operation to offset the manufacturing costs with fuel savings. In this research, a relatively simple swing energy recuperation system is presented using an additional accumulator, fixed displacement hydraulic motor, and control valves. With the system, hydraulic fluid is stored in an accumulator, and a simple controller opens a valve to allow the stored energy to assist the engine in running the main pumps. Using various accumulator capacity and hydraulic motor displacement combinations, the recuperation system was simulated for six cycles of a digging and dumping operation. The simulation results show that an optimum configuration reduces the swing energy consumption by 48% and the total excavator energy by 17% during digging and dumping operations.
CitationThompson, B., Yoon, H., Kim, J., and Lee, J., "Swing Energy Recuperation Scheme for Hydraulic Excavators," SAE Technical Paper 2014-01-2402, 2014, https://doi.org/10.4271/2014-01-2402.
- Wang, D., Guan, C., Pan, S., Zhang, M. et al., “Performance Analysis of Hydraulic Excavator Powertrain Hybridization,” Autom. Constr. 18(3):249-257, 2009, doi:10.1016/j.autcon.2008.10.001.
- Lin, T., Wang, Q., Hu, B., and Gong, W., “Development of Hybrid Powered Hydraulic Construction Machinery,” Autom. Constr. 19(1):11-19, 2010, doi:10.1016/j.autcon.2009.09.005.
- Lin, T., Wang, Q., Hu, B., and Gong, W., “Research on the Energy Regeneration Systems for Hybrid Hydraulic Excavators,” Autom. Constr. 19(8):1016-1026, 2010, doi:10.1016/j.autcon.2010.08.002.
- Kwon, T., Lee, S., Sul, S., Park, C. et al., “Power Control Algorithm for Hybrid Excavator with Supercapacitor,” IEEE Trans. Ind. Appl. 46(4):1447-1455, 2010, doi:10.1109/TIA.2010.2049815.
- Pourmovahed, A., Beachley, N., and Fronczak, F., “Modeling of a Hydraulic Energy Regeneration System: Part I-Analytical Treatment,” J. Dyn. Syst. Meas. Control 114(1):155-159, 1992, doi:10.1115/1.2896497.
- Ho, T. and Ahn, K., “Design and Control of a Closed-Loop Hydraulic Energy-Regenerative System,” Autom. Constr. 22:444-458, 2012, doi:10.1016/j.autcon.2011.11.004.
- Hippalgaonkar, R., Zimmerman, J., and Ivantysynova, M., “Investigation of Power Management Strategies for a Multi-Actuator Hydraulic Hybrid Machine System,” SAE Technical Paper 2011-01-2273, 2011, doi:10.4271/2011-01-2273.
- Kuhar, M. S., “HYBRID EXCAVATOR FOCUSED ON FUEL SAVINGS-Caterpillar's 336E H is designed to be sustainable, offer greater fuel efficiency and to lower owning and operating costs,” Rock Products, 16-17, Nov. 2012.
- Lin, X., Pan, S., and Wang, D., “Dynamic Simulation and Optimal Control Strategy for a Parallel Hybrid Hydraulic Excavator,” J. Zhejiang Univ. Sci. A 9(5):624-632, 2008, doi:10.1631/jzus.A071552.
- Gawlik, A., “Energy Recovery System for Excavators with Movable Counterweight,” Journal of KONES Powertrain and Transport 20(2):113-120, 2013.
- Kim, S., Kim, J., “Swing Relief Energy Regeneration Apparatus of an Excavator,” Patent WO2013081220 A1, June 6, 2013.