연료분사 특성이 가솔린 엔진 HC 배출 특성에 미치는 영향Effects of Port Fuel Injection Characteristics upon HC Emission in SI Engines

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During cold operation period, fuel injection system directly contributes the unburned hydrocarbon formation in spark ignition engines. The relationship between injection parameters and HC emission behavior was investigated through a series of experiments. Spray behavior of port fuel injectors was characterized through a quantitative evaluation of mass concentration of liquid fuel by a patternator and PDA. 6-hole injector was found to produce finer spray than single hole one. Using a purpose-built test rig, the wall wetting fuel was measured, which was mostly affected by wall temperature. Varying coolant temperature($20{\sim}80^{\circ}C$), HC emissions were measured in a production engine. With respect to the different types of injectors, HC emission was also measured. In the 6-hole injector application, the engine produced less HC emission in low coolant temperature region. Though it produces much more amount of wetting fuel, it has the advantages of finer atomization quality. In high coolant temperature region, there was little effect between different types of injectors. The control schemes to reduce HC emissions during cold start could be suggested from the findings that the amount of fuel supply and HC emission could be reduced by utilizing fine spray and high intake wall temperature.
Publisher
대한기계학회
Issue Date
2001-06
Language
KOR
Citation

대한기계학회 2001년 춘계학술대회, v.1, pp.796 - 801

URI
http://hdl.handle.net/10203/15290
Appears in Collection
ME-Conference Papers(학술회의논문)

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