Experimental Research on Effect of Gasoline/Diesel Blends on Combustion and Emissions Characteristics of Diesel Engine

Effects of gasoline/diesel blends in different ratios were studied in a diesel engine.The results show that as gasoline ratio increases,ignition delay increases and combustion duration shortens,beneficial to achieve constant volume combustion,but the max.pressure rise rate increases;soot emission reduces dramatically and NO emissions increase,while indicated thermal efficiency remains almost constant;and the permissible injection timing range becomes small.Considered the trade-off among combustion noise,thermal efficiency and emissions,the best gasoline ratio should be about 50% in this study.Compared to pure diesel combustion,gasoline/diesel blend can achieve low temperature combustion with low NO and soot emissions when combined with EGR.