고압 가솔린/디젤, 액상 LPG 분사의 저온 연료분무 특성

Abstract

Engine emission during cold start below zero temperature condition is one of the issues as the emission emitted during that period covers 80% of the total emission for passenger cars . Spray characteristics(vaporization, atomization and penetration) in the low temperature condition is, therefore, important as they affect engine combustion followed by engine-out emission A wide range of injectors were tasted and characterized Spray characteristics were evaluated in two topical temperatures(15℃ and -10℃). Spray characteristics with the DISI and HSDI injectors seemed to be independent on temperatures selected in the reported work while LPG injector exhibited the growth of the liquid droplet size and the increase of liquid penetration to lead a difference of engine combustion condition and engine-out emission.