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디젤기관에서 모노에테르계 함산소제(EGBE)를 이용한 배기배출물 저감과 분석
오영택(Youngtaig Oh),최승훈(Seunghun Choi) 한국자동차공학회 2002 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2002 No.5_3
In this study, the potential possibility of oxygenated fuel such as ethylene glycol mono -n-butyl ether(EGBE) was investigated for the sake of smoke reduction from diesel engine. Because EGBE include oxygen content approximately 27.1%, it is a kind of effective oxygenated fuel that the smoke emission of EGBE is reduced remarkably compared with commercial diesel fuel, that is, it can supply oxygen component sufficient at high load and speed in diesel engine. The results of this study show two conclusions. 1. The smoke emission of the EGBE blended fuel is exhausted lower than that of the diesel fuel at all experimental region in direct injection diesel engine. 2. Smoke emission from diesel engines was strongly depended on oxygen content in fuel regardless of operating condition. 3. Creation of smoke emission is depend on oxidization of higher boiling point hydrocarbons
IDI 압축착화기관에서 바이오디젤유 및 함산소연료(EGBE) 적용에 의한 배기배출물 특성 연구
오영택(Youngtaig Oh),최승훈(Seunghun Choi),주주현(Juhyun Ju),이대현(Daehyun Lee),아즈자르갈(Azjargal Janchiv) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
The purposes of improving air quality and diversifying energy resources have intensified research on verifying appropriate alternative fuels for internal combustion engines to solve serious environmental problems caused by the air pollution that is exhausted from various vehicles. In this study, the potential of biodiesel fuel and oxygenated fuel (ethylene glycol mono-n-butyl ether; EGBE) was investigated as an effective method of decreasing the smoke emission. The smoke emission of blending fuel (EGBE 0~20 vol-%) was reduced in comparison with diesel fuel and it was reduced approximately 64% at 2000 rpm, full load in the 20% of blending rate. But torque and brake specific energy consumption (BSEC) didn"t have no large differences. Also, the effects of exhaust gas recirculation (EGR) on the characteristics of NOx emission has been investigated. Consequently, it was found that simultaneous reduction of smoke and NOx was achieved with oxygenated fuel(10%) and cooled EGR rates (5~10%) in an IDI diesel engine.
오영택(Youngtaig Oh),최승훈(Seunghun Choi),서정덕(Jungduck So),차성민(Sungmin Cha) 한국자동차공학회 2008 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Our environment is faced with serious problems related to the air pollution from automobiles in these days. In particular, the exhaust emissions of diesel engine are recognized main cause which influenced environment strong. In this study, the potential possibility of biodiesel fuel was investigated as an alternative fuel for a naturally aspirated IDI diesel engine. The smoke emission of biodiesel fuel was reduced remarkably in comparison with diesel fuel, that is, it was reduced approximately 36% at 2000rpm, full load. But, power, torque and brake specific energy consumption didn't have no large differences. But, NOx emission of biodiesel fuel was increased compared with commercial diesel fuel. Also, the effects of exhaust gas recirculation(EGR) on the characteristics of NOx emission has been investigated. It was found that simultaneous reduction of smoke and NOx was achieved with biodiesel fuel(20vol-%) and cooled EGR method(10~15%).
오영택(Youngtaig Oh),최승훈(Seunghun Choi),주주현(Juhyeon Ju),이대현(Daehyun Lee) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
Biodiesel has a large a mount of oxygen in itself, which makes it very efficient in reducing exhaust emission by improving combustion inside an engine. But biodiesel has a flow problem at a low temperature because it has a high viscosity. In this study, the spray behavior and atomization characteristics were investigated to confirm of some effect for the combination of non-esterification biodiesel and fuel additive WDP(water dipole power) and IPA(Isopropyl alcohol). The process of spray was visualized through the visualization system composed of a halogen lamp and high speed camera, and atomization characteristics were investigated through the laser diffraction particle analyzer(LDPA). When blending WDP and IPA with biodiesel, atomization and spray characteristics were improved. Through this experimental result, SMD of blended fuel, WDP 25% and biodiesel 75%, was 33.9% reduced at distance 6 from a nozzle tip under injection pressure 30㎫.
Seoul-10모드에서 바이오디젤유 5%를 적용시 CRDI 디젤기관의 내구특성
오영택(Youngtaig Oh),김남호(Namho Kim),최승훈(Seunghun Choi),김건회(Gunhoi Kim) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
An CRDI diesel engine used to commercial vehicle was fueled with diesel fuel and 5% biodiesel blended fuel(BDF 5%) with Seoul-10 mode in excess of 150 hours. Engine dynamometer testing was completed at regularly scheduled intervals to monitor the engine performance and exhaust emissions. The engine performance and exhaust emissions were sampled at 1 hour interval for analysis. To check the engine parts(valve, injector), the engine was inspected after test. It was concluded that there was no unusual deterioration of the engine, or any unusual changes in engine power and exhaust emissions in spite of operation of 150 hours with BDF 5%.
바이오디젤유와 Dimethoxy Methane 혼합시 디젤기관의 배기배출물 특성 및 EGR의 적용 연구
오영택(Youngtaig Oh),최승훈(Seunghun Choi),김건회(Gunhoi Kim),차성민(Seongmin Cha),박태환(Taehwan Park) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Our environment is faced with serious problems related to the air pollution from automobiles in these days. In particular, the exhaust emissions of diesel engine are recognized main cause which influenced environment strong. In this study, the potential possibility of biodiesel fuel and Oxygenated fuel(dimethoxy methane, below DMM) was investigated as an alternative fuel for a naturally aspirated direct injection diesel engine. The smoke emission of blending fuel(biodiesel fuel 90vol-%+DMM 10vol-%) was reduced in comparison with diesel fuel, that is, it was reduced approximately 70% at 2500rpm, full load. But, power, torque and brake specific energy consumption didn't have no large differences. But, NOx emission of biodiesel fuel and DMM blended fuel was increased compared with commercial diesel fuel. It was needed a NOx reduction counterplan that EGR method was used as a countermeasure for NOx reduction. It was found that simultaneous reduction of smoke and NOx emission was achieved with BDF(95%) and DMM(5%) blended fuel and cooled EGR method(15%).