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An Experimental Study on the Fundamental Characteristics of LPG Gas Injections System  

Jang, Yeol-Sung (Graduate School of Energy & Environment, Seoul National University of Technology)
Woo, Sung-Dong (Graduate School of Energy & Environment, Seoul National University of Technology)
Kim, Hyeong-Sig (Graduate School of Energy & Environment, Seoul National University of Technology)
Park, Chan-Jun (Department ol Mechanical Engineering, Seoul National University of Technology)
Ohm, In-Yong (Department ol Mechanical Engineering, Seoul National University of Technology)
Publication Information
Journal of Energy Engineering / v.15, no.4, 2006 , pp. 277-283 More about this Journal
Abstract
In this study, butane 100% was used as fuel to verify the real fuel effect such as vapor pressure variation due to temperature change. A MPI fuel injection system for V-6 engine, which has reverse 'L' type cross section to minimize the possibility of liquid phase injection, was composed and one bank was operated under sequential injection scheme. Flow rate were measured according to injection duration, interval, and pressure. Also occurring of liquid phase injection was monitored with varying vaporizer and fuel rail temperature. The result shows that basic characteristics of injection is a relatively difference between air and LPG injection. Under cold start condition, however, the occurrence of liquid injection becomes more severe as the pressure increases, and sufficiently high temperature both in vaporizer and fuel rail is very important to insure gaseous injection. In addition, the temperature of vaporizer plays more important role in keeping LPG vapor state and the reverse 'L' type cross section of the rail is available to prevent liquid injection.
Keywords
MPI (Multi Point Injection); Sequential injection; Vaporizer;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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