직접분사식 가솔린 엔진에서 연료 온도에 따른 팬형 분무 및 연소 특성의 변화 The Effects of Fuel Temperature on the Spray and Combustion Characteristics of a DISI Engine

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The spray behavior of direct-injection spark-ignition (DISI) engines is crucial for obtaining the required mixture distribution for optimal engine combustion. The spray characteristics of DISI engines are affected by many factors such as piston bowl shape, air flow, ambient temperature, injection pressure and fuel temperature. In this study, the effect of fuel temperature on the spray and combustion characteristics was partially investigated for the wall-guided system. The effect of fuel temperature on the fan spray characteristics was investigated in a steady flow rig embodied in a wind tunnel. The shadowgraphy and direct imaging methods were employed to visualize the spray development at different fuel temperatures. The microscopic characteristics of spray were investigated by the particle size measurements using a phase Doppler anemometry (PDA). The effect of injector temperature on the engine combustion characteristics during cold start and warming-up operating conditions was also investigated. Optical single cylinder DISI engine was used for the test, and the successive flame images captured by high speed camera, engine-out emissions and performance data have been analyzed. This could give the way of forming the stable mixture near the spark plug to achieve the stable combustion of DISI engine.
Description
기계공학전공
Publisher
한국자동차공학회
Issue Date
2006-05
Language
KOR
Citation

한국자동차공학회 논문집, v.14, no.3, pp.103-111

ISSN
1225-6382
URI
http://hdl.handle.net/10203/19243
Appears in Collection
NE-Journal Papers(저널논문)
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