19권 4호 121-129 2011 [한국자동차공학회 논문집 ]
| 제목 | 국내 휘발유 자동차의 증발가스 배출 특성에 관한 연구 |
|---|---|
| 분야 | 엔진 및 연소 |
| 언어 | Korean |
| 저자 | 박준홍(국립환경과학원), 이종태(국립환경과학원), 김정수(국립환경과학원), 임윤성(국립환경과학원), 박영표(국립환경과학원), 최광호(남서울대학교) |
| Key Words | Evaporative emission(증발가스), Diurnal loss(주간 증발가스), Running loss(주행 중 증발가스), Variable temperature SHED(가변 온도 제어 밀폐실), Fuel vapor pressure(연료 증기압력) |
| 초록 |
Hydrocarbons which are the main sources of VOCs from motor vehicles are emitted not only from the engine exhaust gas but also from evaporation of the fuel in storage and supplying systems. Evaporative emissions from gasoline fuel systems could be classified by diurnal, hotsoak and running loss. Diurnal loss test procedures are different as countries. Korea introduced new evaporative regulation in 2009 with 24hour VT-shed test procedure and relaxed emission standards. The estimations on different test procedures in this study show that the new Korean regulation get a little more severe than before and the 2 day diurnal loss test of U.S. is the most severe. So the test procedures as well as the stronger standards should be considered in the next evaporative emission regulation to reduce VOCs from motor vehicles. The important parameters to affect evaporative emissions are air and fuel temperature and fuel vapor pressure. Diurnal loss increases exponentially as rising air temperature and vapor pressure. The effects of vapor pressure on running loss are different as the capacities of canisters. Tests with simulating real temperature and driving conditions show that hydrocarbons in evaporative emissions could be more than those in exhaust gas in summer season because of the higher air temperature. |
| 원문(PDF) | 다운로드 |