Experimental Study on Spray Characteristics of Diesel Engines and Analysis of Fuel Dripping Phenomenon

作者：Yu Qiang Wu, Qian Wang, Zhi Sheng Gao, Zhou Rong Zhang, Dai Li · 发表于：Advanced materials research · 年份：2014 · DOI：10.4028/www.scientific.net/amr.1078.271 · 被引用次数：1 · 研究领域：Engineering Applied Research、Advanced Combustion Engine Technologies、Vehicle emissions and performance

Experimental study on macroscopic spray characteristics of a certain type of domestic common rail injectors under the conditions of different injection pressures was carried out through a high-speed digital camera. Furthermore, a fuel dripping phenomenon at the end stage of injection was observed through the high-speed digital camera equipped with a long-distance microscope, and a further analysis of the phenomenon was made. The results show the increase in the injection pressure can evidently enhance spray cone angle and expand the scope of spray field in combustion chamber, which is conducive to air-fuel mixture. The spray cone angle during the development spray shows a double-peak shape. And the long response-time of seating of solenoid valve core that disables the injection cutting off in time is one of factors causing fuel dripping phenomenon.