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Braiding 공법을 적용한 CFRP Drive Shaft 개발
조의선 ( Jo Uiseon ),권규식 ( Kwon Kyusik ) 한국경영공학회 2016 한국경영공학회지 Vol.21 No.4
In research on high-efficiency and low-pollution automobile, the focus has shifted toweight-lightening of materials and carbon composite is used for improving engine and fuel efficiency. In this study, carbon composite was applied to steel-based drive shaft that requires high torque to supply power to the car engine, in order to make a shaft core that can bear the maximum rupture torque of 4,000N·m over four sessions. For Carbon Fiber Reinforced Plastics(CFRP) molding, braiding machine was used to weaving carbon fiber and the vacuum bag molding technique was applied to making the sample. To make a drive shaft core to combine with CFRP, torsion rupture test, structural analysis, X-ray analysis, and section inspection were performed before finding problems and applying relevant improvement to step-by-step cores, which led to the maximum torque value of 4,236.7N·m.
디젤기관에서 Di-Ether 계열 함산소제의 적용에 관한 연구
오영택(Youngtaig Oh),최승훈(Seunghun Choi),권규식(Kyusik Kwon),김종렬(Jonglyul Kim) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In this study, the potential possibility of oxygenated fuel for di-ether group oxygenated additives such as Methyl tertiary butyl ether (MTBE) and diethylene glycol dimethyl ether(DGM) were investigated for the sake of exhausted smoke reduction from diesel engine. MTBE has been used as a fuel additive blended into unleaded gasoline to improve octane number, but the study of application for diesel engine was incomplete. DGM has been used as a oxygenated fuel additive, too. Because they includes oxygen content approximately from 18% to 36%, it is a kind of oxygenated fuel that the smoke emission of them is reduced remarkably compared with commercial diesel fuel, that is, it can supply oxygen component sufficiently at high loads and speeds in a diesel engine. But, NOx emission was increased compared with commercial diesel fuel. It was needed a NOx reduction countermeasure that cooled EGR method was used as a countermeasure for NOx reduction. It was found that simultaneous reduction of smoke and NOx emission was achieved with oxygenated blended fuel and cooled EGR method(10~15%).
직접분사식 디젤기관에서 디에테르계(Butyl Ether) 함산소성분 혼합율에 따른 배기배출물 특성 연구
오영택(Youngtaig Oh),최승훈(Seunghun Choi),권규식(Kyusik Kwon),안희선(Huisun Ahn) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In this study, the potential possibility of Oxygenates on di-ether group(butyl ether) was investigated as an additives for a naturally aspirated direct injection diesel engine. It tested to estimate change of engine performance and exhaust emission characteristics for the commercial diesel fuel and oxygenates additives blending fuel which has four kinds of mixed ratio. The smoke emission of blending fuel(diesel fuel 80vol-%+BE 20vol-%) was reduced in comparison with diesel fuel, that is, it was reduced approximately 26% at 2500rpm, full load. And, power, torque and brake specific energy consumption didn't have no large differences. But, NOx emission of blended fuel was increased compared with commercial diesel fuel.
4기통 IDI 디젤기관에서 함산소성분 혼합연료의 적용에 관한 실험적 연구
오영택(Youngtaig Oh),최승훈(Seunghun Choi),권규식(Kyusik Kwon),김종열(Jonglyul Kim) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.5_1
In this paper, the effect of oxygen component in fuel on the exhaust emissions has been investigated for an indirect injection diesel engine. It was tested to estimate change of engine performance and exhaust emission characteristics for the commercial diesel fuel and oxygenated blended fuel which has four kinds of mixed ratio. And, the effects of exhaust gas recirculation(EGR) on the characteristics of NOx emission have been investigated. Ethylene glycol mono-n-butyl ether(EGBE) contains oxygen component 27% in itself, and it is a kind of effective oxygenated fuel of mono-ether group that the smoke emission of EGBE is reduced remarkably compared with commercial diesel fuel, that is, it can supply oxygen component sufficiently at higher loads and speeds in diesel engine. It was found that simultaneous reduction of smoke and NOx was achieved with oxygenated fuel and cooled EGR method.
바이오디젤유와 디에테르계 함산소성분 혼합시 농업용 디젤기관의 배기배출물 특성
최승훈(Seunghun Choi),오영택(Youngtaig Oh),권규식(Kyusik Kwon),안희선(Huisun Ahn),유경현(Kyounghyun Ryu) 한국자동차공학회 2006 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) 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.
직접 분사식 디젤기관에서 함산소연료의 성상에 따른 성능 및 배기배출물 특성 연구
오영택(Youngtaig Oh),최승훈(Seunghun Choi),권규식(Kyusik Kwon),김종렬(Jonglyul Kim) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In this paper, the effects of oxygen component in oxygenated blended fuels on the exhaust emissions have been investigated for direct injection diesel engine. It tested t estimate changes of engine performance and exhaust emission characteristics for the commercial diesel fuel and oxygenated blended fuels which have four kinds of fuel on DGM (diethylene glycol dimethyl ether), MTBE (methyl tert-butyl ether), Dimethyl carbonate (DMC) and EGBE(ethylene glycol mono-n-butyl ether) and various mixed rates. And, the effects of exhaust gas recirculation(EGR) on the characteristics of NOx emission and brake specific fuel consumption rate also have been investigated. The results of this study show that individual hydrocarbons as well as total hydrocarbon of oxygenated blended fuels are reduced remarkably compared with diesel fuel. It was found that simultaneous reduction of smoke and NOx emission was achieved with oxygenated blended fuels and cooled EGR method.
커먼레일 방식 디젤기관에서 바이오디젤유의 혼합율에 따른 특성 연구
오영택(Yongtaig Oh),최승훈(Seunghun Choi),권규식(Kyusik Kwon),김남호(Namho Kim) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.11_1
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 common rail diesel engine. The smoke emission of biodiesel fuel 5vol-%(min. content) was reduced in comparison with diesel fuel, that is, it was reduced approximately 60% at 4000rpm, full load. But, power, torque and brake specific energy consumption didn't have no large differences. But, NOx emission ofbiodiesel fuel was increased compared with commercial diesel fuel.
디젤기관에서 연료의 성상변화와 EGR의 적용 및 미연탄화수소 분석에 대한 연구
최승훈(Seunghun Choi),오영택(Youngtaig Oh),권규식(Kyusik Kwon),조영태(Youngtae Cho),이충호(Choongho Lee) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.5
The potential possibility of oxygenated fuel for di-ether group oxygenated additives such as Methyl tertiary butyl ether (MTBE) and diethylene glycol dimethyl ether(DGM) were investigated for the sake of exhausted smoke reduction from diesel engine. They include oxygen content approximately from 18% to 36%, it is a kind of oxygenated fuel that the smoke emission of them is reduced remarkably compared with commercial diesel fuel. In the experiment by gas chromatography, unburned hydrocarbons of oxygenated fuel were reduced than those of commercial diesel fuel. NOx emission was decreased by exhaust gas recirculation(EGR) method which was applied EGR rate from 5% to 30%. And, simultaneous reduction of smoke and NOx was achieved with combination of EGR and fuel property alteration.