Journal
FUEL
Volume 87, Issue 12, Pages 2691-2697Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2008.02.017
Keywords
oxygenate; combustion; diesel engine
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Combustion and emissions of a DI diesel engine fuelled with diesel-oxygenate blends were investigated. The results show that there exist the different behaviors in the combustion between the diesel-diglyme blends and the other five diesel-oxygenate blends as the diglyme has the higher cetane number than that of diesel fuel while the other five oxygenates have the lower cetane number than that of diesel fuel. The smoke concentration decreases regardless of the types of oxygenate additives, and the smoke decreases with the increase of the oxygen mass fraction in the blends without increasing the NO, and engine thermal efficiency. The reduction of smoke is strongly related to the oxygen-content of blends. CO and HC concentrations decrease with the increase of oxygen mass fraction in the blends. Unlike conventional diesel engines fueled with pure diesel fuel, engine operating on the diesel-oxygenate blends presents a flat NOx/ Smoke tradeoff curve versus oxygen mass fraction. (c) 2008 Elsevier Ltd. All rights reserved.
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