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자료유형
학술저널
저자정보
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한국자동차공학회 International journal of automotive technology International journal of automotive technology Vol.6 No.3
발행연도
2005.6
수록면
215 - 219 (5page)

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Liquefied petroleum gas (LPG) has been used as motor fuel due to its low emissions and low cost. A liquid direct injection system into a cylinder was suggested as a next generation system to maximize a fuel economy as well as a power. This study addresses the analysis of the LPG spray injecting from single hole injector. Two different test conditions are given, which are a fully developed spray case with various injection pressures and a developing spray case with ambient pressure variation. The LPG spray photographs are compared with the sprays of gasoline and diesel fuel at the same conditions, and the spray angles and penetration lengths are also compared, and then the spray behavior is analyzed. The LPG spray photos show that the dispersion characteristic depends very sensitively on the ambient pressure soon after injection. The spray angle is very wide in a low ambient pressure condition until the saturated pressure, but the angle is quickly reduced at the condition over the pressure. However, the down stream of the LPG spray shows much wider dispersion and less penetration than those of gasoline and diesel sprays regardless ambient pressure condition.

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ABSTRACT

1. INTRODUCTION

2. EXPERIMENTAL EQUIPMENT AND CONDITIONS

3. RESULT AND DISCUSSION

4. CONCLUSIONS

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