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内容提要对双燃料(酒精-柴油)喷射发动机的燃烧过程和排放已有研究.酒精的燃烧过程可以用火焰传播来解释,通过酒精的燃烧能够减少因柴油燃烧而产生的黑烟.最大酒精代用率达到柴油的96%(容积).虽然在低负荷时双燃料喷射发动机的指示热效率比原发动机低4%左右,但在高负荷时比原发动机大约高1%.黑烟排放少,CO的排放量与原发动机大致相同,虽然HC的排放量大约比原发动机高一倍,但NO_x的排放量却减少了50%.
Executive Summary There have been studies on the combustion process and emissions of dual fuel (alcohol-diesel) injection engines. The combustion process of alcohol can be explained by flame propagation, which can reduce the black smoke generated by the combustion of diesel fuel through the combustion of alcohol. At 96% of diesel, although the indicated thermal efficiency of the dual-fuel injection engine is about 4% lower than that of the original engine at low load, it is about 1% higher than that of the original engine at high load. The emissions are about the same as those of the original engine. Although HC emissions are about twice as high as the original engine, the emission of NO x is reduced by 50%.