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SI 자동차의 엔진 및 운행 특성에 따른 배기가스 배출 성능에 관한 연구
류재욱(Jaewook Ryu),송정훈(Jeonghoon Song),이창식(Changsik Lee) 한국자동차공학회 2001 한국자동차공학회 Workshop Vol.2001 No.-
This study focus on the effect of vehicle mileage, driving characteristics and the vehicle type on the exhaust gas performances. In this study, 1,260 vehicles of spark ignition engine are sampled and investigated. The exhaust emissions are measured with a CO/HC emission gas analyzer. The SI engine vehicles are classified by driving distance, engine specification and fuel to research on the effects of each parameters on the exhaust emissions.<br/> The results show that the driving distances are not affect on the emission gases so much. However. the engine characteristics, for example, DOHC or SOHC have influence upon the quantity of exhaust emissions. In addition, the LPG vehicle emits more CO and HC than gasoline vehicle. although it is widely known that LPG engine emits less emissions. The results arc also depicted that the CO or HC are increased almost in inverse proportion to excess air ratio (λ). Therefore, it is certified that to reduce the CO or HC, the control of excess air ratio is very important.
CAE 해석과 시험을 통한 INTAKE SYSTEM 최적설계 검증
류재욱(Jaewuk Ryu),노윤홍(Yunhong Noh) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
This paper presents the optimized design process of intake systems by using numerical theory which applied the pressure distance factor and CAE simulation. The intake system is especially important system which creates the power and provides the air at the engine. Before making a trial product, the designer organize a system which a numerical theory is calculated and applied. . And we verifies the adequacy with CAE analysis. This research shows that the result of applied numerical theory is remarkably consistent with CAE analysis. Therefore, the design process for intake system by using the numerical theory and CAE simulation have the validation. In the early design stage, we do not the validation test using a trial product, so that we have lots of advantages for time and cost using numerical theory and CAE simulation.
N-[4-Cyano-2-fluoro-5-(substituted)phenyl]-3,4,5,6- tetrahydrophthalimide 유도체의 합성과 제초활성
류재욱(Jae Wook Ryu),정근회(Kun Hoe Chung),고영관(Young Kwan Ko),우재춘(Jae Chun Woo),구동완(Dong Wan Koo),김태준(Tae-Joon Kim),최정섭(Jung Sub Choi),박채현(Chae Hyun Park),김대황(Dae-Whang Kim) 한국농약과학회 2005 농약과학회지 Vol.9 No.1
A series of N-[4-cyano-2-fluoro-5-(2-pyrimidinyloxy, 2-benzyloxy or 2-pyridinyloxy)phenyl]-3,4,5,6- tetrahydrophthalimides was synthesized, and the herbicidal activities of those deivatives were evaluated through pre- and post-emergence application under upland conditions in a greenhouse. The results showed that most compounds resulted in stronger herbicidal activity on broadleaf weeds than on grass weeds and higher through post-emergence than pre-emergence application. The N-[(4-cyano-2-fluoro-5-(2-pyrimidinyloxy) phenyl]-3,4,5,6- tetrahydrophthalimide showed the best weed control efficacy and marginal corn safety at a rate of 60 g/㏊ through pre-emergence application.
피리미딘이 치환된 3,4,5,6-tetrahydrophthalimide 유도체의 합성과 제초활성
류재욱(Jae Wook Ryu),이민주(Min Ju Lee),정근회(Kun Hoe Chung),고영관(Young Kwan Ko),우재춘(Jae Chun Woo),구동완(Dong Wan Koo),김태준(Tae-Joon Kim),최정섭(Jung Sub Choi),김대황(Dae-Whang Kim) 한국농약과학회 2006 농약과학회지 Vol.10 No.4
A series of-N-[4-chloro-2-fluoro-5-(2-(substituted)pyrimidinyloxy)phenyl]- 3,4,5,6-tetrahydrophthalimides was synthesized, and the herbicidal activities of those derivatives were evaluated through pre- and post-emergence application under upland conditions in a greenhouse. The results showed that most compounds resulted in stronger herbicidal activities on broadleaf weeds than on grass weeds. The N-[4-chloro-2-fluoro-5-(2-pyrimidinyloxy) phenyl]-3,4,5,6-tetrahydrophthalimide showed the best weed control efficacy and marginal corn safety at a rate of 60 g/㏊ through pre-emergence application.