含水乙醇汽油发动机非常规气体排放试验研究

Experimental Study on the Unregulated Gaseous Emissions from Hydrous Ethanol Gasoline Engine

在一台进气道多点喷射汽油机上,分别燃用含水率不同的三种含水乙醇汽油E10、E10w3、E10w5和纯汽油进行台架试验。试验中使用福立GC9790Ⅲ型气相色谱仪对发动机非常规气体排放进行测量,以研究含水乙醇汽油对发动机非常规气体排放的影响。试验结果表明:随输出转矩的提高,发动机的乙醛排放和1,3-丁二烯排放有下降趋势,而苯排放有上升趋势;随转速的提高,发动机的乙醛排放和苯排放会下降,而1,3-丁二烯排放有上升趋势;发动机燃用含醇汽油时,乙醛排放较燃用纯汽油时高,且随含水乙醇汽油含水率的提高会有所升高;苯排放较燃用纯汽油时低,且随含水率的提高逐渐降低;1,3-丁二烯的排放明显增高,且随含水率的提高呈现小幅度上升。

Three kinds of hydrous ethanol gasoline with different water content El0, E10w3, E10w5 and pure gasoline were tested on a multi-point port injection gasoline engine. The unregulated gaseous emissions of the engine were measured using the GC9790III gas chromatograph to study the effect of the hydrous ethanol gasoline on the engine＇s unregulated gaseous emissions. The results show that with the increase of the output torque, the acetaldehyde emission and 1,3-butadiene emission of the engine are decreasing, while the benzene emission is increasing. With the increase of engine speed, the acetaldehyde and benzene emissions are decreasing, while the 1,3-butadiene emission is increasing. When engine fueled with ethanol gasoline, the acetaldehyde emission is higher than the counterpart of engine fueled with pure gasoline, and that emission increases with water content of hydrous ethanol gasoline increasing. The benzene emission is lower than the counterpart of engine fueled with pure gasoline, and that emission will decrease with water content of hydrous ethanol gasoline decreasing. The 1,3- butadiene emission is observably higher than the counterpart of engine fueled with pure gasoline, and that emission will increase with water content of hydrous ethanol gasoline increasing.