The study on the effect emission on a small EFI engine by using ethanol blended fuel properties

• Main Authors: Wun-jie You, 游文杰
• Other Authors: Bai-Fu,Lin
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/hhzqn8

碩士 === 國立臺北科技大學 === 車輛工程系所 === 99 === As one of clean alternative and low pollution fuels, the Alcohol’s fuel properties are the similar to gasoline. The Alcohol fuel could be used directly or blend with fossil fuel on SI engine. Therefore, it becomes the most widely used alternative energy. To reach the main purpose of saving energy and reducing pollution policy, the Gasohol called E10 (which is blend with fossil fuel and 10% Ethanol) is widely used internationally now. In this study we use G95 (fuels 95 unleaded gasoline), E3 (unleaded gasoline mix with 3% Ethanol), E5 (unleaded gasoline mix with 5% Ethanol) and E10 (unleaded gasoline mix with 10% Ethanol) as the experimental fuels. To investigate and compare the BSFC and exhaust emissions of these four fuels, we used these four fuels separately in the electronic fuel injection (EFI) system engine which is single cylinder, air-cooled, four-stroke, 125 CC. The results of this experiment show that the ethanol blend fuel had a lower vapor pressure, lower sulfur content, lower gum content, lower benzene content, and higher-octane value than the G95 fuel. After the experiment, the result shows that ethanol can reduce BSFC, decrease engine-out HC and CO emissions than 95 unleaded gasoline fuel. As previously noted, using the ethanol blend fuel the effect of conserving energy and reducing emissions will be better than using the 95 unleaded gasoline.