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합성가스를 이용한 가솔린엔진의 아이들 배기가스 저감 연구
송춘섭(Chunsub Song),김창기(Changgi Kim),강건용(Kernyoung Kang),조용석(Youngseok Cho) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.11_1
Fuel reforming technology for the fuel cell vehicles has been frequently applied to internal combustion engine for the reduction of engine out emissions. Since syngas which is reformed from fossil fuel has hydrogen as a major component, it has abilities to enhance the combustion characteristics with wide flammability and high speed flame propagation. It is supposed that the usage of syngas in the internal combustion engine is an effective solution to meet the future strict emission regulations.<br/> In this study, syngas was added to a gasoline engine to improve combustion stability and exhaust emissions of idle state. Syngas fraction is varied to 0%, 50%, 100% with various ignition timing and excess air ratio. Combustion stability, exhaust emissions, fuel consumption and exhaust gas temperature were measured to investigate the effects of syngas addition on idle performance. Results showed that syngas has ability to widely extend lean operation limit and ignition retard range with dramatical reduction of engine out emissions.
합성가스 연료의 전소 조건에서 가솔린 엔진의 냉간시동 배기가스 배출특성
송춘섭(Chunsub Song),김창기(Changgi Kim),강건용(Kernyoung Kang),조용석(Youngseok Cho) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Fuel reforming technology for the fuel cell vehicles could be adopted to internal combustion engine for the reduction of engine out emissions. Since syngas which is reformed from fossil fuel has hydrogen as a major component, it has abilities to enhance the combustion characteristics with wide flammability and high speed flame propagation. In this paper, syngas was feed to 2.0 liter gasoline engine during the cold start and early state of idle condition. Not only cold start HC emission but also NOx emission could be dramatically reduced due to the fact that syngas has no HC and has nitrogen upto 50% as components. Exhaust gas temperature was lower than that of gasoline feeding condition. Delayed ignition timing, however, resulted in increased exhaust gas temperature approximated to gasoline condition. It is supposed that the usage of syngas in the gasoline internal combustion engine is an effective solution to meet the future strict emission regulations by the reduction of cold start THC and NOx emissions.
연비주행사이클의 냉간조건에서 엔진 냉각수 제어밸브 개폐에 따른 연료소비량 변화에 관한 실험적 연구
이창인(Changin Lee),송춘섭(Chunsub Song),한수지(Sooji Han) 한국자동차공학회 2019 한국자동차공학회 학술대회 및 전시회 Vol.2019 No.11
Fuel Consumption of vehicle is affected and determined by combustion efficiency of engine and friction of driveline. Specially, when vehicle is in a cold condition, the effect is much bigger owing to heat loss from low temperature of combustion chamber and friction from low temperature of engine oil and transmission oil. In this paper, one thing is found which control system would be more advantageous from a fuel consumption perspective, for coolant of cylinder head quickly warmed up in a cold condition between using the coolant to be increased temperature for high fuel efficiency and using the coolant to be reduced friction of engine oil and transmission oil through experimental method from NEDC, WLTC and UDDS. For this control, it’s realized through CCV which is adjusted flow path of coolant, and timing of open and close for CCV as per each test cycle is decided on 120℃ metal temperature of cylinder head. As a result of NEDC and WLTC, fuel consumption is improved on CCV close test right after test cycles begin. This is considered more beneficial that CCV close test in a cold condition increases temperature of combustion chamber, makes higher fuel efficiency, and decreases DFCO start timing from fast coolant temperature rise than CCV open test. At UDDS in a cold condition, fuel consumption according to CCV open and close shows less than the result of NEDC & WLTC. In case of UDDS, there are more of acceleration and high speed at the test cycle than NEDC & WLTC, therefore CCV opens fast, the time for high fuel efficiency period is short, and DFCO activated time is the same regardless of CCV open & close.
6kW급 권선형 동기 전동기를 이용한 e-Assist 시스템 개발
김기만(Kiman Kim),송춘섭(Chunsub Song),이호기(Hoki Yi),홍정표(Jungpyo Hong),이근호(Geunho Lee) 한국자동차공학회 2013 한국자동차공학회 부문종합 학술대회 Vol.2013 No.5
Recently, Permanent Magnet Synchronous Motor(PMSM) are mainly used to the ISG system for high power density. Due to the cost of rare earth increasing, ensuring cost competitiveness has been to a critical issue in spite of PMSM have high power density advantage. Other types motor such as inductance motor doesn’t use rare earth, whereas have the low power density. In this paper, a developed e-Assist system that used to Wound Rotor Synchronous Motor (WRSM) is propesed to complement these drawbacks. High performance can be achieved without using the rare earth.
DME 엔진용 LNT 촉매에서 NO<SUB>x</SUB> 흡장과 환원에 관한 실험적 연구
가재금(Jaegeum Ka),김재형,윤여빈(Yubin Yoon),송춘섭(Chunsub Song),박영준(Youngjoon Park),이성욱(Seangwock Lee),조용석(Yongseok Cho) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
The DME fuel is an alternative fuel as low PM emission. But the DME engines emit the same level of NOx emission as diesel engines. The LNT(Lean NOx Trap) catalyst is an aftertreatment system typically used to reduce the oxides of nitrogen(NOx) emissions for diesel engine. During the lean condition of exhaust gas, the NOx is stored in the LNT catalyst, then released and reduced during the rich condition of exhaust gas. This paper aimed to figure out evaluate to effect of exhaust gas temperature, space velocity, O₂ concentration in exhaust gas and mass of reductant injection for adsorption and reduction of LNT catalyst for DME engines by using the test rig.
외장형 연료펌프를 사용한 LPLi 연료공급시스템에서의 연료상태량 변화 예측
김재형(Jaehyung Kim),윤여빈(Yubin Yoon),송춘섭(Chunsub Song),박영준(Youngjoon Park),이성욱(Seangwock Lee),조용석(Yongseok Cho) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
The LPG(Liquefied Petroleum Gas) fuel attracts attention as a clean alternative fuel. In order to further reduce the exhaust emission and improve performance in LPG engines, the LPLi(Liquid Phase LPG Injection) system is used. In LPLi system, the fuel pump performance is important for keeping the LPG over it"s saturated vapor pressure. An external fuel pump is needed to improve the durability and the ease of maintenance for LPG engines. This paper predicted the variation of fuel properties on the LPLi system with an external fuel pump. From each component"s thermodynamic model, an 1-D simulation is developed for LPLi systerm with an external fuel pump. Then the 1-D simulation data analyzed and compared with the rig-test and chassis dynamometer test. The 1-D simulation, the rig-test and the chassis dynamometer test produced similar results.