http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
전동식 과급시스템을 이용한 HEV전용 고효율/고성능 밀러싸이클 엔진 연구
홍승우(Seungwoo Hong),한동희(Donghee Han),이관희(Kwanhee Lee),강현진(Hyunjin Kang),김재헌(Jaehun Kim),구자언(Jaeon Gu),임종석(Jongsuk Lim),박한용(Hanyong Park),김도완(Dowan Kim),팽용석(Yongsuk Pang),박귀열(Guiyeol Park) 한국자동차공학회 2020 한국자동차공학회 부문종합 학술대회 Vol.2020 No.7
A Miller Cycle engine based on a hybrid electric vehicle (HEV) dedicated boosting system, working in great synergy with a HEV abundant in electric power capacity, has been studied to improve the efficiency and performance of the HEV. Conventional turbocharged boosting system in an internal combustion engine dedicated vehicle grants fuel economy benefits thanks to engine downsizing. In a HEV, an electric motor governs the operating region of the engine, limiting the fuel economy benefits of said downsizing approach. Moreover, turbocharging reduces exhaust energy for the catalytic converter while increasing the back pressure, leading to adverse effects on emissions and fuel economy. This paper discusses the HEVdedicated Miller Cycle engine, which can boost the intake pressure without increasing the back pressure. In addition, the energy of the exhaust gas can be used in its entirety for the catalytic converter, thus favorable for emission reduction. An intake manifold integrated with a water-cooled intercooler was used, lowering the volumetric efficiency while realizing high charge cooling effects. The HEV-dedicated Miller Cycle engine was tested in a vehicle for fuel consumption in various drive cycles. In comparison to the base HEV, a similar level of fuel economy was achieved for the FTP-75 and HWFET combined drive cycle. For the more aggressive US-06 drive cycle, a 4.1% fuel economy improvement was realized. Furthermore, a 20% improvement in vehicle dynamic performance was observed in various conditions; a result of both engine output increase by the HEV-dedicated boosting system and the fast response of the electric supercharger.