期刊
JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY
卷 27, 期 2, 页码 583-592出版社
KOREAN SOC MECHANICAL ENGINEERS
DOI: 10.1007/s12206-012-1235-4
关键词
Energy flow; Engine temperature; Engine thermal management; Variable speed water pump
资金
- BK21 program
- IAMD of Seoul National University
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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