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임윤성(Yunsung Lim),박준홍(Joonhong Park),강대일(Daiil Kang),김지영(Jiyoung Kim),박영표(Youngpyo Park),서충열(ChoongYeol Seo),이종태(Jongtae Lee),김정수(Jeongsoo Kim) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
Hydrocarbons which are the main sources of VOCs from motor vehicles are emitted not only from the exhaust but also from evaporation of the fuel in storage and supplying systems. The important parameters to affect evaporative emissions are air and fuel temperature and fuel vapor pressure. Diurnal loss rises exponentially as air temperature and vapor pressure increase. The effects of vapor pressure on running loss are different as the capacity of canister. Tests with simulating real temperature and driving conditions show that hydrocarbons in evaporative emissions are more than that in exhaust gas in summer season because of the higher air temperature. The BTEX analysis of VOCs shows that toluene is the most emitter and benzene is the next and that photochemical ozone creation potential gets lower as vapor pressure decrease.