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RDE 시험 주행 조건에서 디젤 승합차의 NOx 배출 및 연료 소모 특성
김주일(Jooil Kim),박태준(Taejun Park),박정배(Jeongbae Park),천민우(Minwoo Cheon),이대엽(Daeyup Lee) 한국자동차공학회 2019 한국자동차공학회 부문종합 학술대회 Vol.2019 No.5
In order to investigate the characteristics of a RDE test driving, the wheel torque, fuel consumption, NOx emission etc are measured and analyzed. Fundamental study is carried out eventually to develop a short and reduced cycle for the RDE test using a dynamometer. A test cycle within about one hour using a chassis dynamometer is to be developed in the future. The results of this work can be used to develop a vehicle according to the RDE test conditions, which can contribute to saving the cost and time required in the R&D process.
LFG 엔진의 희박 과급 조건에서 점화 특성 및 연소 속도 연구
김주일(Jooil Kim),박정배(Jeongbae Park),박태준(Taejun Park),천민우(Minwoo Cheon),이대엽(Daeyup Lee) 한국자동차공학회 2019 한국자동차공학회 부문종합 학술대회 Vol.2019 No.5
In this study, high energy ignition system with a mechanical distributor is constructed and the combustion velocity using constant volume combustion chamber with laser back light under the lean condition of LFG consisting of mainly methane and carbon dioxide is measured. From this work, it can be seen that the burning rate of LFG having a methane to CO2 ratio of 60:40 is about 67% at Φ=0.7 as compared with methane. Thus it is required that the combustion of LFG under lean and supercharging conditions needs very strong turbulent flow and optimal combustion conditions compared to CH4 only.
실도로 주행시험 특성 평가를 위한 차대동력계 단축 사이클 개발
김주일(Jooil Kim),박정배(Jeongbae Park),천민우(Minwoo Cheon),이대엽(Daeyup Lee),고상철(Sangcheol Ko) 한국자동차공학회 2019 한국자동차공학회 학술대회 및 전시회 Vol.2019 No.11
In order to complement and strengthen the emission test method for light duty vehicles, Real Driving Emissions (RDE) test method that measures the exhaust emissions on roads has been used additionally with test cycle at chassis dynamometer both in Europe and Korea. At chassis dynamometer, variables can be tested in a controlled experimental environment. However, under actual driving conditions, there are many variations in the fuel consumption and emission of a vehicle depending on driver’s vehicle control characteristics as well as traffic conditions. As the emissions regulations become more stringent, car manufacturers need more time and effort to develop and test their vehicles. Thus, developing a data evaluation method to evaluate the normality of test conditions is an important challenge. A goal of this study is to develop a test cycle that can be implemented indoors using a chassis dynamometer for the RDE test, which takes less time and effort than outdoors.
산업용 LPG MPI 엔진의 흡기관 최적 설계를 위한 흡기다기관의 3D 제작 타당성 연구
김주일(Jooil Kim),박정배(Jeongbae Park),천민우(Minwoo Cheon),이대엽(Daeyup Lee) 한국자동차공학회 2019 한국자동차공학회 학술대회 및 전시회 Vol.2019 No.11
LPG (propane) fuel is hightly capable of to reduce fine dust emissions as well as to emit less CO2 than diesel or gasoline. In order to increase the volumetric efficiency compared to the conventional mixer type technology, development of 45kW engine was carried out by applying gas injection MPI technology. For this purpose, several shapes of intake manifolds were fabricated with 3D printing to optimize their the volumetric efficiency. A heat-resistant material for 3D printing filament was used to evaluate the performance through the engine test. In addition, a prototype intake manifolds were constructed and tested to investigate the optimum shape of the plenum and runner. The 3D printing intake manifold made of carbon nylon revealed an identical power performance as the existing intake pipe made of aluminum.
내연기관 자동차 교육용 엔진 동력계와 차대 동력계의 제작 및 교육 계획
김기선(Kisun Kim),최재유(Jaeyu Choi),전주은(Jueun Jeon),이주원(Juwon Lee),권상준(Sangjun Kwon),박정배(Jeongbae Park),김주일(Jooil Kim),김종민(Jongmin Kim),천민우(Minwoo Cheon),이대엽(Daeyup Lee) 한국자동차공학회 2018 한국자동차공학회 학술대회 및 전시회 Vol.2018 No.11
Although the R&D and production of automotives with internal combustion engines is expected to continue for the next several decades, the educational interest among undergraduate and graduate levels is gradually decreasing. Therefore, in this study, an engine dynamometer and a chassis dynamometer using 25cc four stroke engine were designed and made to raise interest and help teach university and graduate level courses of internal combustion engine and automotives. Education to use CAD software and coding of imbedded controllers can be carried out in designing these apparatuses. Using an engine dynamometer and a chassis dynamometer designed and made in this study, education of ECU mapping for optimization of fuel consumption can also be carried out.
LFG 희박 연소 엔진에서 NOx 저감 연구를 위한 단기통 엔진 개발
김종민(Jongmin Kim),박정배(Jeongbae Park),김주일(Jooil Kim),천민우(Minwoo Cheon),이대엽(Daeyup Lee) 한국자동차공학회 2018 한국자동차공학회 학술대회 및 전시회 Vol.2018 No.11
Recovery of energy from engine powered electric generation using exothermic energy of Landfill gas(LFG), which is composed mainly of methane and carbon dioxide, is very advantageous environmentally than deteriorating environmental pollution and global warming due to its emitting into air and flare combustion. In order to carry out a study to reduce NOx emissions including water injection in a generator engine using LFG as a fuel, a single cylinder engine system with a displacement of 2.7 liters and an output of 40 kW class was designed and developed. It is also important in this study to generate high ignition energy for stable ignition of LFG mixtures under both lean and supercharged conditions.