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Injector Control Logic for a Liquid Phase LPG Injection Engine  

조성우 (서울대학교 기계항공공학부)
민경덕 (서울대학교 기계항공공학부)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.11, no.5, 2003 , pp. 15-21 More about this Journal
Abstract
The liquid phase LPG injection engine is a new technology to make good use of LPG as a clean energy. However, it is difficult to precisely control air/fuel ratio in the system because of variation of fuel composition, change of temperature and flash boiling injection mechanism. This study newly suggests an injector control logic for liquid phase LPG injection systems. This logic compensates a number of effects such as variations of density, stoichiometric air/fuel ratio, injection delay time, injection pressure, release pressure which is formed by flash boiling of fuel at nozzle exit. This logic can precisely control air/fuel ratio with only two parameters of intake air flow rate and injection pressure without considering fuel composition, fuel temperature.
Keywords
Liquid phase LPG injection engine; Flash boiling; Injector control logic; ECU;
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