이중연료 디젤엔진의 입자상물질 배출에 미치는 파일럿연료의 영향 = Role of Pilot Fuel on Particulate Matter Emission of a Dual-fuel Engine

다국어 초록 (Multilingual Abstract)

A new engine system, the dual-fuel engine, uses a small diesel pilot to ignite the main fuel, natural gas. This was shown to reduce both NO_x and particulate matter (PM), but the detailed mechanism of PM formation is still unknown. In this study, the role of pilot fuel on PM emission was examined by performing a PM sampling study using a test dual-fuel diesel engine system. The engine was run at various conditions with three different pilot fuels: regular diesel, bio-diesel, and water/diesel/additive emulsion (Lubrizol PuriNOx), and the results were compared. Statistical analysis using Z test showed that bio-diesel did not change the emission characteristics of dual-fuel engine significantly, whereas PuriNOx significantly increased PM emission. The results of this study suggest that the pilot fuel makes an important role in PM formation in a dual-fuel engine, calling for more studies on pilot fuel injection for PM emission reduction.