Other Conference Proceedings


TitleChoongsik Bae and Jinsuk Kang, "Diesel Spray Characteristics of Common-Rail VCO Nozzle Injector," pp107-112, Proc. 2000 SKICICE (Sino-Korea Conference on IC Engines), Tianjin, Dec. 2000.

Choongsik Bae and Jinsuk Kang, “Diesel Spray Characteristics of Common-Rail VCO Nozzle Injector,” pp107-112, Proc. 2000 SKICICE (Sino-Korea Conference on IC Engines), Tianjin, Dec. 2000.

Abstract

Spray characteristics of diesel fuel injection is one of the most important factors in diesel combustion and pollutant emissions especially in HSDI (High Speed Direct Injection) diesel engines where the interval between the onset of combustion and the evaporation of atomized fuel is relatively short. An investigation into various spray characteristics from different holes of VCO(Valve Covered Orifice) nozzles was performed and its results were compared to standard sac nozzle. The global characteristics of spray, including spray angle, spray tip penetration, and spray pattern were measured from the spray images which were frozen by an instantaneous photography with a spark light source and ICCD. These spray images were acquired sequentially from the first injection to fifth injection to investigate injection to injection variation. For better understanding of spray development and their internal structures, a long-distance microscope was used to get magnified spray images at the vicinity of the nozzle hole with a laser sheet illumination. Also backward illuminated images with a spark light source were taken to understand surface structures of dense spray from VCO nozzle of common-rail injection system.

PreviousChoongsik Bae, “Fuel Sprays for Direct Injection Engines,”pp59-71, Proc. 3rd Int’l Symposium on Next Generation Vehicle Technology, Kwangju, Nov. 2000.
NextChoongsik Bae, Junemo Koo and Yoonho Cho, “Exhaust Gas Recirculation in a Spark-Ignition LPG Engine,” pp322-325, Proc. 3rd ASPACC, Seoul, Jun. 2001.
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