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Development of Flow Rate Model of a Liquid Phase LPG Injector  

조성우 (서울대학교 기계항공공학부)
민경덕 (서울대학교 기계항공공학부)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.11, no.5, 2003 , pp. 22-28 More about this Journal
Abstract
Flash boiling mechanism in the injector interferes with fine fuel metering in a liquid phase LPG injection engine. This study presents a mathematical model to precisely predict an injection quantity. A calibration procedure of injection quantity, which is very prompt and precise in measuring, is developed using a gas analyzer. According to this procedure, injection quantity can be obtained under various fuel compositions, temperatures and injection pressures. The release pressure of liquid phase LPG is estimated based on these experimental data. Although the release pressure is much lower than the saturation pressure, it is linearly proportional to the saturation pressure.
Keywords
Liquid phase LPG injection engine; Flash boiling; Flow rate; Release pressure;
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