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하이브리드 파워트레인의 엔진 재시작 및 감속 구간에서 탄화수소 배출물 및 엔진 제어 특성 분석
온형석(Hyungseuk Ohn),유성은(Seongeun Yu),민경덕(Kyoungdoug Min) 한국자동차공학회 2008 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Stringent regulation of exhaust emission and improvement of fuel economy have become major issues in the automotive industry. Hybrid electric vehicle (HEV) can be one of the crucial alternative plans over current conventional vehicle, but they have drawbacks such as the increase of engine out total hydrocarbon (THC) emissions and the deterioration of combustion stability at frequent engine stop and restart. This study performs experimental investigation to obtain a better understanding of THC emission characteristic at engine restart and deceleration driving on a HEV powertrain of parallel motor/generator type. Using a fast response Flame Ionization Detector (FFID) and specified tool for cycle by cycle and cylinder to cylinder, the combustion and engine control characteristic was analyzed during transient state of hybrid powertrain. The experimental conditions cover variation of high voltage battery State of Charge (SoC), spark ignition timing and injected fuel mass. As an experimental result, we can unearth the effects of spark ignition timing and injected fuel mass control for combustion stability during engine restart.
조성우(Sungwoo Cho),유성은(Seongeun Yu),정대봉(Daebong Jung),민경덕(Kyungdoug Min) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
This research focused on analysis of energy flow in parallel hybrid electric vehicle system. Hybrid Powertrain system includes much more equipment than conventional system, so it is not easy to pick up the point which causes low system efficiency. By calculating from chemical energy of fuel to kinetic energy delivered on wheel, however, energy flow chart can be diagramed. And conversion efficiency computed with this chart can help researchers to know which step caused more energy loss than expected. CAN is used as data acquisition method, as it is more brief way to get the driving parameter than any other method in chassis test situation. Most of all, CAN communicates real driving parameter which is used in ECU communication, it would be the most reasonable method in analyzing energy flow.
마일드 하이브리드 차량에서 배터리 SoC에 따른 엔진의 작동효율 분석
조성우(Sungwoo Cho),정대봉(Daebong Jung),유성은(Seongeun Yu),민경덕(Kyungdoug Min) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
This research focuses on the effects engine operating efficiency between battery SoC level in mild type hybrid electric vehicle. Although Hybrid electric power train system has been highlighted with potentials in low fuel consumption and exhaust gas emission, it is not easy matter to actualize these strengths. Hybrid electric power train system includes both engine system and electric system, so it is inevitable thing to optimize two different kinds of systems for ideal results. In this research, chassis driving test was conducted in different initial battery SoC condition. Based on experimental data, relation between engine efficiency and battery SoC was analyzed.