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| his article investigates the influence of cetane number improver on heat release rate and emissions of a high-speed diesel engine fueled with ethanol-diesel blend fuel. Different percentage of cetane number enhancer （0%、0.2%、0.4%）were added to blends, and the engine tests were performed on a high speed diesel engine. The results show that: the engine power decreased slightly, the thermal efficiency improved remarkably, and the NOx and smoke emissions decreased simultaneously when diesel engine fueled with blends; the engine power can be recovered, NOx and smoke emissions further reduced when CN improver were added to blends. From the combus-tion analysis, it can be found that the ignition delay prolonged, the total combustion duration shortened, and the maximum heat release rate increased for ethanol-diesel blend fuel when compared to diesel fuel; the combustion characteristics of ethanol-diesel blend fuel at large load may be recovered to diesel fuel by CN improver, but a large diffe |
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| Keywords: Diesel engine; Ethanol-diesel blend fuel; Cetane number improver; Heat release rate; Emission |
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