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김홍성(Hongsung Kim),박정서(Jungseo Park),김문헌(Munheon Kim) 한국자동차공학회 2002 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2002 No.5_1
It was established to the system, which adapted combustion system not following spark ignition system without any ignition apparatus. It was heated and controlled inlet-air into conventional single cylinder engin. Adapting the method of increasing inlet-air heating temperature made possible enhanced the compression ignition cbaIacteristics of gasoline fuel injected to intake-port. It was established the compression ignition gasolin engin. So, the system was investigated the emission characteristics of compression ignition gasolin engine. The conclusions of combustion emission chracteristics are as followed.<br/> The gasoline compression ignition system made possible to run lean bum(over air-fuel ratio 30) the engine, and emission of carbon monoxide was emitted little about the changes of air-fuel ratio. Inlet-air heating temperature and the changes of engine speed were hardly got influenced. The emission of hydrocaIbon was increased as much as air-fuel ratio's increased<br/> But the ranges of changes was very narrow. It was emitted little only as much as 2 ppm and 4 ppm within the changes of inlet-air heating temperature and engine speed. The emission of nitrogen oxide was decreased greatly as much as air-fuel ratio was decreased. When air-fuel ratio was over 45, the emission of nitrogen oxide was emitted little in case that the changes of inlet-air heating temperature and engine speed.<br/> The achievements of gasoline compression ignition system could improved that the emission concentrations of carbon monoxide, hydrocarbon and nitrogen oxide were reduced greatly.
김홍성(Hongsung Kim),김문헌(Munheon Kim) 한국자동차공학회 2002 한국자동차공학회 Symposium Vol.2002 No.11
It was established to the system, which adapted combustion system not following spark<br/> ignition system without any ignition apparatus. Adapting the method of increasing inlet-air<br/> heating temperature made possible enhanced the compression ignition characteristics of gasoline<br/> fuel injected to intake-port. It was established the compression ignition gasoline engine. So, the<br/> system was investigated the performance characteristics of compression ignition gasoline engine<br/> by the variety of injection timing.
김문헌(Munheon Kim),김홍성(Hongsung Kim) 한국자동차공학회 2003 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
This work deals with a controlled auto-ignition (CAI) single cylinder gasoline engine, focusing on the extension of operating conditions. The fuel is injected indirectly into electrically heated inlet air flow. In order to keep a homogeneous air-fuel mixing, the fuel injector is water-cooled by a specially designed coolant passage. Investigated are the emission characteristics of compression ignition gasoline engine by the variety of injection timing. The compression ignition gasoline engine can be achieved that the ultra lean-burn with self-ignition of gasoline fuel by heating inlet air. It can be achieved that the emission concentrations of carbon monoxide, hydrocarbons and nitrogen oxide had been significantly reduced by CAI combustion compared with conventional spark ignition engine.<br/>
최윤종(Yunjong Choi),김홍성(Hongsung Kim),박정서(Jungseo Park),김문헌(Munheon Kim) 한국자동차공학회 2001 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2001 No.11_1
This study introduced the bulk combustion systems instead of the conventional gasoline spark ignition system and diesel compression ignition system. To achieving both high efficiency, without ignition systems to the conventional single cylinder diesel engine, established the inlet-air heating and control systems for the heating and controlling of inlet-air.<br/> The lean limit of air-fuel ratio improved by the inlet-air heating with the compression ignition combustion systems' and the allowable air-fuel ratio extended to 63 when the temperature of the inlet-air was 170 ℃ and the engine speed 1000 rpm.<br/> The cycle maximum pressure and the brake mean effective pressure increased to proportional, when the air-fuel ratio was richer.<br/> The brake specific fuel consumptions increased largely at the air-fuel ratio was above 45 and affected strongly by the inlet-air heating temperature.<br/> The maximum brake thermal efficiency showed at the air-fuel ratio was 35 and decreased in case the leaner region and improved the higher inlet-air heating temperature.<br/> The maximum heat release rate increased in according to decreased and advanced the<br/> accurance period of the maximum heat release rate.<br/> Also, as showed the mass burned rate, the burning period shorted and established the rapid combustion in according to the air-fuel ratio decreasing.<br/>