http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
1.6L GDI 차량에서 EURO 6 입자상 물질 규제를 만족하기 위한 PN 저감에 관한 연구
김영재(Youngjae Kim),전상열(Sangyoul Jun),김용하(Yongha Kim),류승현(Seunghyun Rew),이동현(DongHyeon Lee),최관희(Kwanhee Choi),박심수(Simsoo Park) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
Recently, the alternative to reduce CO₂ and improve fuel efficiency owing to rising oil price and green house gas emission regulation is GDI vehicle that is expected to be a dominant technology for quite a long time. However, unlike PFI engine GDI engine that sprays fuel inside of cylinder emits soot like diesel engine as all you know. We called it is PM. (Particular matter) PM of less than 2.5μm which is very, very tiny material leads to fatal consequences in human body by accumulating at lungs without filtering through respiratory system. Therefore, particle emission will be added for European automobile emission regulation in 2014. The disputed result is currently 4.5mg/km for particle mass and 6<SUP>*</SUP>10<SUP>11</SUP>#/km for particle number in case of EURO Ⅵ diesel vehicle. In case of EURO Ⅵ gasoline vehicle, particle mass is 4.5mg/km and particle number is under the discussion stage. In this study, present level of 1.6L GDI vehicle is measured and is figured out correlation between PM and PN through engine test. A cause of PM and PN formation is divided into several types of reason; however, this paper describes the optimization of engine control parameter without hardware change like combustion chamber, cylinder shape, injector type and injection target position. Same amount of CO₂, reduction of existing exhaust gas and 87% PN in contradistinction to the base in NEDC mode test is attained. As a result, 60% level of provisional PN limit is accomplished and this result will contribute to vehicle cost reduction by decreasing after-treatment cost. Based on this study, if it is expanded to different displacement vehicles, a standard of vehicle development to satisfy PN limit will be prepared.
GDI 엔진 촉매 활성화 구간의 입자상 물질 배출 저감에 대한 연구
김용하(Yongha Kim),김영재(Youngjae Kim),전상열(Sangyoul Jun),류승현(Seunghyun Rew),이동현(Donghyun Lee),최관희(Kwanhee Choi),박심수(Simsoo Park) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
GDI engine has been paying attention to be one of the solutions to improve fuel economy and to respond to emission regulations. However, due to the wall wetting phenomenon caused by high pressure injection directly into cylinders, there is a problem about particle emission increase. In this research, particle matter emission characteristics due to suction stroke start of injection(SOI) angle, compression stoke end of injection angle(EOI), injection split factor were investigated by using a 4-cylinder GDI engine for catalyst heating range. Using the test results, SOI, EOI and injection split factor were optimized for minimum particle emission. With the optimized variables, it has been confirmed that catalyst light-off time, COV and CO2, NOx emission were slightly increased, HC was increased 19%, but particle emission was reduced more than 90%.