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 continue to 
decline in recent decades. Therefore, a new type of fuel derived 
from renewable energy sources is needed. Moreover, the combustion products of the fossil fuels contribute to air pollution and 
global warming, so the use of the bio fuels becomes one of the 
solutions to overcome it. Ethanol has 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 was conducted by mapping the injection duration 
at a high compression ratio. The results showed increased torque, 
power and BMEP when compression ratio increased. By mapping 
the injection duration, all the performances parameters increased 
gradually up to the maximum speed. Moreover, the CO and HC 
emission decreased significantly by this method. However, the SFC 
and thermal efficiency of ethanol were inferior to gasoline. It was 
because ethanol had lower heating value than that of gasoline.