Abstract:

After measuring the engine's emission and the catalyst convertsion rate,the influence on the  catalyst werestudied by using ethanolgasoline and normal gasoline. In the experiments, 5 kinds of ethanolgasoline and 6 kinds of normal gasoline on  the market were  used, and the CO, HC, and NOx emission were measured beforeand after the catalyst. The results showed that ethanol gasoline's CO emission was higher than normal gasoline's, HC emission was equal to normal gasoline's, and NOxemission was lower than that of normal gasoline. When using ethanolgasoline, the conversion rate for CO and HC was  higher than using normal gasoline in idling mode, while the conversion  rate for NOx was a little lower. For the  medium speed of engine, the convertsion  rate for CO was lower with medium loads, and higher with other load. The conversion rate for HC and NOx was equal to normal gasoline under  most of the conditions.

Key words: ethanolgasoline; catalyst; emission