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Analysis of engine temperature and energy flow in diesel engine using engine thermal management

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Abstract

Recently, precise analysis of energy flow in engines has become necessary to improve fuel economy. An integrated engine thermal management model, which is introduced in this paper, is suitable for that process. The model consists of six sub-models for thermal mass, coolant, lubricant, heat transfer, friction, and exhaust. The sub-models are coupled to each other and they exchange heat and signals. Combustion energy flow analysis and temperature estimation of the engine components and working fluids were simulated under various conditions. Simulation results were compared with experimental data and they showed good agreement. Then, a variable-speed water pump (VSWP) to control coolant flow was applied in place of a conventional water pump. Engine warm-up time decreased with proper coolant flow control, and fuel economy could be improved by 2.5%.

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Authors and Affiliations

  1. School of Mechanical and Aerospace Engineering, Seoul National University, Seoul, 151-742, Korea

    Daebong Jung, Jinwoo Yong, Hanho Song & Kyoungdoug Min

  2. Advanced Institutes of convergence Technology, Suwon-si, Gyeonggi-do, 443-270, Korea

    Hoimyung Choi

Authors
  1. Daebong Jung
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  2. Jinwoo Yong
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  3. Hoimyung Choi
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  4. Hanho Song
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  5. Kyoungdoug Min
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Correspondence to Kyoungdoug Min.

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Recommended by Associate Editor Oh Chae Kwon

Daebong Jung received his B. S. from the School of Mechanical and Aerospace Engineering at Seoul National University in 2007. He is currently a Ph. D candidate in the school of Mechanical and Aerospace Engineering at Seoul National University. His research interests are vehicle and engine thermal management, electrochemical battery simulation model, waste heat recovery system and control strategy for HEV.

Jinwoo Yong received his B. S. and M. S. from the School of Mechanical and Aerospace Engineering at Seoul National University in 2009 and 2011, respectively. He is currently an engineer in Renault Samsung Motors, Korea.

Hoimyung Choi received his B. S., M. S. and Ph. D degrees from the School of Mechanical and Aerospace Engineering at Seoul National University in 1996, 1998 and 2003, respectively. He is currently a research engineer in the Advanced Institute of Convergence Technology. His research interests are internal combustion engine simulation and experiment.

Hanho Song received his B. S. degree from the School of Mechanical and Aerospace Engineering at Seoul National University in 2003. He then obtained his M. S. and Ph. D degrees from the Department of Mechanical Engineering at Stanford University in 2005 and 2009 respectively. He is currently an assistant professor in the School of Mechanical and Aerospace Engineering at Seoul National University.

Kyungdoug Min received his B.S. and M.S. degrees from the Department of Mechanical Engineering at Seoul National University in 1986 and 1988, respectively. He then obtained his Ph.D. degree from M.I.T in 1994. He is currently a professor in the School of Mechanical and Aerospace Engineering at Seoul National University.

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Jung, D., Yong, J., Choi, H. et al. Analysis of engine temperature and energy flow in diesel engine using engine thermal management. J Mech Sci Technol 27, 583–592 (2013). https://doi.org/10.1007/s12206-012-1235-4

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  • DOI: https://doi.org/10.1007/s12206-012-1235-4

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