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Liquefied petroleum gas(LPG) is a popular and widely used alternative fuel, due mainly to its abundance and indigenous availability at attractive prices. A port injection type LPG fuel system characteristics were investigated to adopt the system to a LPLi engine. It was also studied the improvement of starting performance. The result in all the research was found using by V-6 LPLi engine, 2656㏄, mainly the performance of engine start. In this study, engine control variables such as injection pressure, fuel injection duration were changed by using injector driver(IC5160) at engine start to fine out the trends of engine speed variations and stability of engine start operation. Through the study, it is observed that the injection pressure affected to the stability of engine start operation and engine speed but the effects were insignificant on it. Increase in injection duration led to decrease of engine speed and improve of stability of engine start operation. On the other hand increase in ISA opening rate let to increase of engine speed and deterioration of stability of engine start operation. This result may offer the idea that how the work of improving engine start performance.

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Abstract
1. 서론
2. 실험장치 및 방법
3. 결과 및 고찰
4. 결론
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UCI(KEPA) : I410-ECN-0101-2009-556-017555888