Experimental Investigation of Using Ethanol-Gasoline in Electronically Controlled SI Engine

This paper experimentally investigates engine performance and emissions of a commercial elec- tronically controlled SI engine fueled with ethanol-gasoline blended fuel.The results show that engine pow- er output and torque decrease at partial load and they give no reduction at full load operating condition as blended fuel is used.Ethanol-gasoline can decrease CO,HC and NO_x emissions under idling condition. The brake specific fuel consumption increases by 5%～10%,but the brake specific energy consumption improves and region of fuel economy of ethanol-gasoline fueled engine becomes narrow.The performance of ethanol-gasoline engine is depended on controlling strategy of air/fuel ratio.