Performance and Pollutant Emission of Four-stroke Motorcycle Engines Using Ethanol-Gasoline Blended Fuels

• Main Authors: Ruei-Hong Sun, 孫睿鴻
• Other Authors: 陳世銘
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/86313897589021654391

碩士 === 國立臺灣大學 === 生物產業機電工程學研究所 === 98 === The effects of air pollutant emissions and engine performance of a single four-stroke 125 cm3 displacement motorcycle engine with it’s original carburetor using various ethanol-gasoline blended fuels were investigated in this study. The experiments were conducted at four speeds (30, 40, 50, and 60 km/hr) with five kinds of ethanol blending percentage (0, 10, 20, 30, and 40% v/v) fuel conditions. Power output, fuel consumption, gaseous air pollutants, and aerosol air pollutants were measured to analyze their results. The results showed the power output was slightly decreased and the fuel consumption was a little increased when ethanol-gasoline blended fuel was used. The results showed an average reduction of 0.83 - 30.82 % in engine power output and an average increase of 7.02 - 30.79 % in engine brake specific fuel consumption. Regarding the influences of air pollutants compared with using no-ethanol gasoline fuel, the emission of CO had an average reduction of 73 - 98.47 % and the emission of NOx had an average increase of 9.46 - 63.55 %. Furthermore, the particulate matters number concentrations was reduced when the ethanol blended rate was increased, the average total number concentration reduced at 7.62 - 90.6 % and the average mass concentration reduced at 21.76 - 99 %.