I209 THEORETICAL ANALYSIS IN AN AUTOMOTIVE ENGINE COOLING SYSTEM(Others in engine)
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概要
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An automotive engine cooling system is closely related with overall performances of an engine, including reduction of fuel consumption, decrease of air pollution, and increase of engine life. Because of complex reaction between each component, the direct hardware experiment, using a vehicle, takes high cost, long time, and slow response to the system change. Therefore, a computer simulation would provide the designer with an inexpensive and effective analysis tool for design, development, and optimization of the automotive engine cooling system over a wide range of operating conditions. In this work, it has been predicted the thermal performance of the engine cooling system in cases of stationary mode, constant speed mode, city-drive mode, and hill-climb mode by mathematical modeling of each component and numerical analysis. The components are engine, radiator, heater, thermostat, water-pump, and cooling-fan. Since the engine model is the most important, the engine is divided into eight sub-sections such as cylinder block, cylinder wall, piston, head, head block, gas, cylinder water jacket, and head water jacket. The mean temperatures of eight sections are simultaneously calculated at a time. For detail calculation, the radiator and heater are also divided into many sub-sections. The sub-section is an elemental volume for modeling and assumed to consist of three parts, coolant, tube with fin, and air. Hence it has been developed the simulation program that can be used in case of design and system configuration changes. The overall tendencies of the results agreed well with those of actual situations in four modes.
- 一般社団法人日本機械学会の論文
- 2000-10-01
著者
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Youn Jong
Dept. Of Mech. Eng. Graduate School University Of Ulsan
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Song Sung
Jungil Eng. Co.
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Won Sung
Dept. of Mech. Eng., University of Ulsan
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Won Sung
Dept. Of Mech. Eng. University Of Ulsan