Abstract
As gasoline prices rise and the green movement grows, more fluid power companies are working to develop hydraulic hybrid drive trains for large trucks to passenger cars and wind turbines. The hydraulic hybrid drive system is more effective and efficient than traditional hybrid systems because the quantum of recuperation energy generated is comparatively very high. Series hydraulic hybrid system specially designed for stop-and-go vehicles captures energy as the vehicle brakes and puts the vehicle in motion, when the vehicle is restarted. Then the engine kicks in, once the energy captured gets depleted. The kinetic energy lost as heat energy during mechanical friction braking is recovered and stored in the hydraulic accumulator as potential energy during hydrostatic regenerative braking. This paper gives an insight in to the dynamic simulation results obtained using LMS AMESim tool and effect of various system parameters like pre-charge pressure and hydraulic pump/motor maximum displacement on system output power. Varying the pre-charge pressure of the accumulator and controlling the hydraulic pump/motor maximum displacement show significant improvement in the system output power. Maximizing the system output power indirectly leads to less fuel consumption and pollution reduction in hybrid vehicles.
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R. Ramakrishnan obtained his M.E degree in 2009 from Madras Institute of Technology (MIT), Anna University, Chennai. He is currently working as Half Time Research Assistant and pursuing his Ph.D degree in Precision Engineering and Instrumentation Laboratory, Department of Mechanical Engineering at Indian Institute of Technology Madras, Chennai, Tamil Nadu, India. His current research area of interest include Hydraulic Hybrids, Power Bond Graph Modeling, Dynamic simulation, Control systems, Multi-objective optimization and Mechatronics system design.
Somashekhar S. Hiremath works as an Assistant Professor in the Department of Mechanical Engineering at Indian Institute of Technology Madras, Chennai, Tamil Nadu, India. He received the doctoral degree in 2004 from Indian Institute of Technology Madras, Chennai, Tamil Nadu, India. As a credential he received two national awards: 1. Innovative Student Project Award 2005 for best Ph.D thesis 2. Prof. K. Arumugam National Award for Innovative Research Work in Engineering and Technology. He has published many papers in National and International level. His current research areas are hydraulic hybrids, mechatronics system design, precision engineering, FEM and hybrid machining processes.
M. Singaperumal received his BE degree in Mechanical Engineering in 1969, M.Tech degree in Machine Design in 1976 and Ph.D in Fluid Power from Indian Institute of Technology Madras in 1984. Currently, he is an Emeritus Professor in Precision Engineering and Instrumentation Laboratory, Department of Mechanical Engineering at the Indian Institute of Technology Madras, Chennai, India. He has published many papers in international journals and guided many MS and Ph.D scholars in the field of fluid power, oil hydraulics, robotics and Mechatronics. His current research interest includes hydraulic hybrids, underwater robotics, networked robotics, robot calibration, mechatronics, MEMS, micromachining and oil hydraulics.
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Ramakrishnan, R., Hiremath, S.S. & Singaperumal, M. Theoretical investigations on the effect of system parameters in series hydraulic hybrid system with hydrostatic regenerative braking. J Mech Sci Technol 26, 1321–1331 (2012). https://doi.org/10.1007/s12206-012-0321-y
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DOI: https://doi.org/10.1007/s12206-012-0321-y