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아이들링時 排氣시스템의 排壓特性이 엔진性能에 미치는 影響
박경석(Kyoungsuk Park),박세종(Sejong Park),박대언(Daiun Park),손성만(Sungman Son) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
It is necessary to consider the stability, economic environmental-friendly problems by the development of the road, supply of the automobile, environmental problem as designing the exhaust manifold system. To reduce the noise and the vibration of the automobile, it is needed to consider the pulsation noise, air current noise, vibration of air pipe which generate the intake and exhaust noise of the automobile. Moreover, the discharge sound, intake sound, radiation sound, transmitted sound are occurred. To reduce this influence, the variable valve is needed and to control these factor, path transformation muffler and active type muffler are needed. But engine efficiency could be reduced with this transformation, and resistance by the pressure, thermal property. In this study, in order to establish the optimized conditions design factors which are taking many performance as the variable valve, it shows how the standard performance and the additional element of the exhaust manifold system effects on the engine performance.
정적연소기에서 LPG연료조성에 따른 점화특성 개선에 관한 연구
박경석(Kyoungsuk Park),오현석(Hyunseok Oh),한성철(Sungchul Han) 한국자동차공학회 2003 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
For fuel economy and pollutant reduction. the interests in alternative fuels has increased recently. In this study. We made an ignition system that can be controlled dwell time to change ignition energy. By using this system. we acquired experimental results as follows.<br/> l)It is high as the maximum temperature and pressure of the combustion chamber have propane rate in LPG fuels. 2)The ignition energy increased to fixed rate as the dwell time increased. 3)The combustion temperature and pressure increased and the ignition energy increased as an equivalence ratio richer.<br/>
스파크 점화 기관에서 흡·배기 밸브의 밀착 이상에 의한 연소특성에 관한 연구
박경석(Kyoungsuk Park),손성만(Sungman Son),장성혁(Sukhyung Jang),한성철(Sungchul Han) 한국자동차공학회 2002 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2002 No.5_1
The suction pressure of an abnormal condition spark ignition engine which has non adjusting intake valves becomes reduced and residual gas increases at a greater rate than under normal combustions. This reduction in suction pressure is caused by the distribution of in equalable air in a cylinder leading to abnormal combustion. If this condition continues, the engine ceases due to an increase in engine heat loss.<br/> In this study, we conducted tests to determine the combustion characteristics of a spark ignition engine under both normal and abnormal conditions. The results of this study will establish basic data analysis for developing an automotive diagnosis system by analyzing some of the factors including pressure in the cylinder, output signal of the MAP Sensor and Exhaust gases.
박경석(Kyoungsuk Park),박세종(Sejong Park),박대언(Daiun Park),손성만(Sungman Son) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
It is necessary to consider the stability, economic environmental-friendly problems by the development of the road, supply of the automobile, environmental problem as designing the exhaust manifold system. To reduce the noise and the vibration of the automobile. The need for stricter regulation limits emission and demand for lower fuel comsumpion. According to develop variable type muffler, dual muffler and active intelligence exhaust system unit. Improvement in engine performance and fuel consumption for demand information of pressure fraction and heat characteristics. To be able to determine these factor for we experiment on each case of exhaust system unit. <br/> In this study, in order to establish the optimized conditions design factors which are taking many performance as the variable valve, it shows how the standard performance and the additional element of the exhaust manifold system effects on the engine performance.