SUITABLE INJECTION DURATION OF PURE ETHANOL FUEL FOR MOTORCYLE AT A HIGH COMPRESSION RATIO

Abstract

The gasoline consumption in the transportation sector continues to increase along with the increase of population and civilization. On the other side the fossil fuel reserves continued to decline in recent decades. Therefore a new type of fuel derived from a renewable energy sources is needed. Moreover the combustion products of the fossil fuels contribute on air pollution and global warming, so the use of the bio fuels to be one of the solutions to overcome it. Ethanol have a positive impact in reducing the exhaust carbon emissions and increasing the torque and power. By that reason, ethanol will be a nominator to replace the gasoline fuels in the future. This study investigated the effect of E100 on performances and emissions of Indonesian motorcycle. The research conducted by mapping the injection duration at a high compression ratio. The results shows increased torque, power and BMEP when increase of compression ratio. By mapping the injection duration, all the performances parameters increased gradually up to the maximum speed. Moreover, the CO and HC emission is decreased significantly by this method. However, the SFC and thermal efficiency of ethanol is inferior to gasoline. It is caused by the heating value of ethanol is lower than that gasoline fuels Keywords: Biofuel, gasoline–ethanol blends, high concentration, injection duration, mapping