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Effect of Injector-driven Type on Spray Behavior and Fuel Atomization Characteristics  

Park, Ji-Hong (Graduate School of Hanyang University)
Suh, Hyun-Kyu (Graduate School of Hanyang University)
Park, Sung-Wook (Graduate School of Hanyang University)
Kim, Jae-Wook (Department of Automobile Engineering, Doowon Technical College)
Lee, Chang-Sik (Department of Mechanical Engineering, Hanyang University)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.14, no.1, 2006 , pp. 17-24 More about this Journal
Abstract
This study was performed to figure out spray behavior and fuel atomization characteristics of a piezo-driven injector and a solenoid-driven injector in the common-rail injection system under the same design parameters and test conditions. The process of spray injection was visualized by using the spray visualization system composed of a Nd:YAG laser and an ICCD camera. The atomization characteristics were investigated in terms of axial mean velocity, Sauter mean diameter(SMD) and droplet distributions obtained from a phase Doppler particle analyzer system. Compared with solenoid-driven injector, the piezo-driven injector has short injection delay and reaches quickly to the maximum injection value. Spray tip penetration shows some difference, however, spray angle of piezo-driven injector is wider than that of solenoid-driven injector. Sauter mean diameter of piezo-driven type injector is smaller than that of solenoid-driven type.
Keywords
Piezo-driven injector; Solenoid-driven injector; Common-rail injection system; Injection rate; Spray tip penetration; Spray angle; SMD;
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