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디젤기관에서 메탄올 보조분사에 의한 연소 및 배출가스 특성에 관한 연구
박원옥(Wonok Park),공태원(Taewon Kong),김진영(Jinyoung Kim),하종률(Jongyul Ha) 한국자동차공학회 2002 한국자동차공학회 Symposium Vol.2002 No.11
In this paper, the effects of methanol auxiliary injection method for exhaust emission have been<br/> investigated to a direct injection diesel engine. Methanol is oxygenated fuel with large latent heat. As<br/> methanol is supplied, soot concentration is remarkably reduced. But NOx concentration is a little<br/> increased. Soot is decreased according to the increase of methanol injection duration. It is considered<br/> that the primary cause of the increase in the quantity of pre-mixed combustion. The maximum delivery<br/> quantity of methanol is limited to approximately 50% of total fuel delivery due to misfire and<br/> knocking.
부하와 유동변화에 따른 CNG엔진의 연소 및 배출가스 특성
공태원(Taewon Kong),박원옥(Wonok Park),김진영(Jinyoung Kim),하종률(Jongyul Ha) 한국자동차공학회 2002 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2002 No.5_1
One of serious problems that occur with the development of the modem world is air pollution. Emissions from vehicles are the main sources of air pollution and harmful to the environment and human health. To solve the above problems associated with the air pollution by transportation sector, very severe regulation of the vehicle emission has been required. Natural gas is considered to be an alternative fuel for passenger car and truck transportation that can provide both good environmental effect and energy security.<br/> In the present study, a I.8L conventional gasoline engine was modified to a CNG engine with MPI system, which can be operated with CNG only as a fuel. Flow motion of tumble-swirl were varied with a swirl control valve installed at the inlet pons. In order to optimize the CNG engine, we tested the engine performance (torque, combustion pressure, exhaust temperature etc) and the exhaust gas performance with excess air ratio and spark timing.<br/> As a result, CNG engine with swirl control valve increased brake torque, but higher exhaust emissions, compared 10 the prototype CNG engine
SCV를 장착한 유동변화에 따른 CNG엔진의 연소 및 배출가스 특성
공태원(Taewon Kong),김진영(Jinyoung Kim),박원옥(Wonok Park),하종률(Jongyul Ha) 대한기계학회 2002 대한기계학회 춘추학술대회 Vol.2002 No.5
Natural gas is considered to be an alternative fuel for passenger car and truck transportation that can provide both good environmental effect and energy security.<br/> In the present study. a 1.8L conventional gasoline engine was modified to a CNG engine with PFI system. which can be operated with CNG only as a fuel. The effects of flow motion, air fuel ratio and ignition. timing on the combustion and emission performances were investigated. Flow motion of tumble-swirl were: varied with a swirl control valve installed at the inlet ports. We analyzed the combustion characteristics of engine by analysis of the cylinder pressure.<br/> As a result, CNG engine with swirl control valve increased brake torque, but higher exhaust emissions, compared to the prototype CNG engine
천연가스 전소엔진과 가솔린엔진의 성능과 배출가스 특성비교
공태원(Taewon Kong),김진영(Jinyoung Kim),박원옥(Wonok Park),윤수한(Su-han Yoon),하종률(Jongyul Ha) 대한기계학회 2002 대한기계학회 춘추학술대회 Vol.2002 No.4
One of serious problems that occur with the development of the modern world is air pollution. Emissions from vehicles are the main sources of air pollution and harmful to the environment and human health. To solve the above problems associated with the air pollution by transportation sector, very severe regulation of the vehicle emission has been required. In the situation, many experts considered that the use of CNG engine is a viable substitution for conventional engine. The research of CNG engine has been emphasized because exhaust emission of CNG vehicles may be reduced to an environment acceptable level. For these reasons, CNG engine vehicle is widely used throughout many countries. In the present study, the 1.8-liter naturally aspirated, 4-cylinder, SI gasoline engine was converted to the dedicated CNG engine. Original Engine Control and fuel system were replaced with CNG engine control system and fuel system. In order to optimize the CNG engine, we tested the engine preformance (torque, combustion pressure, exhaust temperature etc) and the exhaust gas performance with excess air ratio and spark timing.