http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
표영덕(Youngdug Pyo),권오석(Ohseuk Kwon),김강출(Gangchul Kim),유승훈(Seunghun Yu),류정인(Jungin Ryu),이영재(Youngjae Lee) 한국자동차공학회 2008 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Dimethyl ether(DME) is an oxygenated fuel with a cetane number higher than that of diesel oil. It meets the ULEV emission regulation and reduces the smoke to almost zero when used in a diesel engine. In the present study, engine performance and exhaust emissions were' investigated with a 8 liter conventional DI diesel engine by using dimethyl ether fuel for development of medium-duty DME bus. Test results showed that the torque and the power with DME were about 70% as those of pure diesel oil, but the brake thermal efficiency decreased a little. Also, smoke index from DME engine showed nearly zero level and NOx was decreased a little compared to diesel oil.
하이브리드차량 연비측정 시험방법 표준화를 위한 기술기준 연구
우영민(Youngmin Woo),권오석(Ohseuk Kwon),김강출(Gangchul Kim),이호길(Hokil Lee),서영호(Youngho Seo),김병수(Byoungsoo Kim),이영재(Youngjae Lee) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Since hybrid electric vehicles (HEV) use a secondary battery as well as an internal combustion engine, its fuel economy is significantly affected by the initial state of charge (SOC). Moreover, SOC changes continuously as the battery drives the vehicle and is recharged by engine or regenerative braking. It gives quite different characteristics compared with the conventional vehicles during the chassis dynamometer test. The relationship between the measured fuel economy and battery current balance was investigated for the two hybrid electric vehicles, the Toyota PRIUS and Honda CIVIC. As a result, a new HEV specific procedure is proposed to give fuel economy value which accounts for the battery current balance.
우영민(Youngmin Woo),김강출(Gangchul Kim),권오석(Ohseuk Kwon),표영덕(Youngdug Pyo),이영재(Youngjae Lee) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Since hybrid electric vehicles(HEV) use a secondary battery as well as an internal combustion engine, their on road performance shows quite different characteristics compared with the conventional vehicles. The objective of this on road performance test is to provide the collection of operating data from HEV evaluation fleets(the Toyota PRIUS and Honda CIVIC) and the analysis of these data to provide an evaluation of fleet operation. As a result, different characteristics of the on road performance of each vehicle were analyzed through a statistical process on the basis of the ensemble average of each short trip interval. The relationship between the measured SOC change and battery current balance was investigated for the two hybrid electric vehicles.
디젤 파일럿 압축착화 천연가스엔진의 성능 및 배출가스 특성
이준혁(Junhyuk Lee),표영덕(Youngdug Pyo),권오석(Ohseuk Kwon),이용균(Yonggyun Lee),나평철(Pyungchul Na),류정인(Jeongin Ryu),이영재(Youngjae Lee) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Natural gas has superior characteristics that are low fuel efficiency, low CO₂, low pollution and stabilization. And it is possible to apply to existing diesel engine with some mechanical modification. Diesel pilot compression ignition CNG engine has advantage of power and efficiency as same as diesel engine without high cost of remodeling and it can use advantage of high compression ratio of diesel engine and has low Smoke and NOx. In the present study, an existing diesel engine was remodeled into single cylinder Diesel pilot CNG engine has two fuel suppling system, one is diesel pilot injection in cylinder using existing Electronic Unit Injector(EUI), the other is the way that injected CNG into a intake manifold using instituted supply apparatus. The test results showed that diesel pilot injection timing was decided 13°BTCD and diesel pilot injection fuel flow was decided 0.19 L/h. At that condition, Smoke and CO were reduced and NOx was slightly increased than using diesel fuel.