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- 저자 : 신진식(J.S.Shin) (검색결과 2 건)
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[論文] 자동차용 기관의 냉각수 온도조절 최적화에 관한 연구(I)
박경석(K.S.Park),신진식(J.S.Shin),이경우(K.W.Lee) 한국자동차공학회 1992 오토저널 Vol.14 No.2
The purpose of this study is to consider the performance and exhaust characteristics in the practical engine according to the cooling water temperature change of engine and to set up the optimum cooling condition and to obtain the optimum operating condition of thermostat in the cooling system. In order to accomplish the purpose of this study, authors have used the following procedure.<br/> 1. This study is to investigate the influence of the cooling water temperature on the engine performance and the exhaust gas, authors regulated the cooling water temperature by using the special closing circuit and measured the concentration of exhaust gas by using the exhaust gas measuring system in the exhaust pipe.<br/> 2. This study carried out the experiment by regulating the opening degree of throttle valve and engine speed in the dynamometer and by changing the cooling water temperature, at the same time kept air - fuel ratio constant and made the spark ignition time MBT (Minimum spark advance for Best Torque)<br/> 3. This study measured the cooling water temperature by using the K-type thermocouple centring around the easy over-heated parts and by installing a special closing circuit.<br/> Therefore, in this study, authors intend to examine the influence of the cooling water temperature on the engine performance, exhaust gas and present the basic materials needed in tte engine design including the optimum operating time control system for the cooling water temperature.
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자동차용 기관의 냉각수 온도조절을 위한 서머스탯의 최적설계 변수설정에 관한 연구
박경석(K. S. Park),신진식(J. S. Shin),원종필(J. P. Won) 한국자동차공학회 1993 한국 자동차공학회논문집 Vol.1 No.2
It is widely recognized that exhaust emissions, fuel economy and engine torque are affected by engine temperature, and logic would suggest that a cooling system offering a better compromise of engine tempera-ture would improve both overall engine performance and economy.<br/> Author measured coolant temperature of some parts and flow rate which are necessary to heat transfer in a engine. And Author determined parameters necessary for the optimum design of a thermostat to keep the best engine performance; determined the optimum operating temperature of electric cooling fan.<br/> A summary of this study is followed.<br/> 1. Study of the effects of cooling condition to combustion character in a engine.<br/> 2. Analyze of heat transfer surrounding engine cylinders.<br/> 3. Study of the effects of cooling character to engine heat rejection, determination of the optimum collant<br/> temperature for keeping the optimum engine performance and determination of the optimum design of a thermostat for keeping that temperature.<br/>
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