Journal of ILASS-Korea (한국분무공학회지)
- Volume 10 Issue 4
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- Pages.8-15
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- 2005
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- 1226-2277(pISSN)
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- 2288-9051(eISSN)
Leakage Characteristics of LPG injector with Low Viscosity LPG Fuel
저점도 LPG연료 인젝터의 누설특성에 관한 연구
Abstract
The use of clean gaseous fuels for the purpose of high efficiency and low emission in automotive engines has tendency to increase in order to meet the reinforcing emission regulations and to efficiently utilize limited natural resources. Automotive companies developed and commercialized a LPG liquid injection system, which is mounted on LPLi(Liquid Phase LPG Injection) engines and vehicles based on this research trend. This research examines the biggest problem in LPLi engine, that is, the leakage characteristics of low viscosity LPG fuel according to the injector design variables. This study is also aimed to improve the performance of fuel-leakage in LPLi engine through the addition of a lubrication improver in HFRR(High Frequency Reciprocating Rig) facility. The needle displacement and the spring displacement of an LPLi injector are found to be already optimized. The possibility of a maximum of 70% leakage reduction compared to a conventional case, is verified when 1000ppm of a lubrication improvement material is added and 40% increase of a injector spring constant (K) is applied.
Keywords
- LPLi (Liquid phase LPG injection);
- Leakage;
- Low viscosity fuel;
- Lubricity improver;
- HFRR(High frequency Reciprocating rig)
- LPG 액상분사방식;
- 누설;
- 저점도 연료;
- 윤활성 향상제;
- 마찰계수 측정기;