摘要：This article chose the new type alcohol-based fuel as the engine fuel, realized lean burn in a CA4GA5 engine, and got the lean burn limit to 20.6. Taking the gasoline as equivalent fuel, and according to 10%, 20%, and 30% volume proportion of alcohol-based fuel, three new types of alcohol-based gasoline synthetic fuel, M10, M20, and M30, were formed. A comparative study of the original engine emissions used new types of alcohol-based gasoline synthetic fuels with Compressed Natural Gas (CNG) and different blending ratios based on M0 at different stoichiometric air-to-fuel ratios was carried out. This article studied the influence of air-to-fuel ratio on cycle emissions under the lean burn condition and analyzed the characteristics of the new European driving cycle. Experimental results show that compared with the working condition of pure gasoline engine, the emissions of total hydrocarbon and carbon monoxide gradually reduce with the increase of alcohol-based fuel blending proportion, while the NOx content presents the rising trend.
关键词：Spark ignition engine; alcohol-based fuel; lean burn; emission characteristics; new European driving cycle
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