Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : Ethanol Fuel

Effects of Ethanol-Gasoline Blends on Exhaust and Noise Emissions from 4-Stroke S.I.Engine

Maher A.R. Sadiq; Yassar K. Ali; Aimen Rashad Noor

Engineering and Technology Journal, 2011, Volume 29, Issue 7, Pages 1438-1450

Considering pollution problems and energy crisis today, investigations
have been concentrated on lowering the concentration of toxic components in
combustion products and decreasing fuel consumption by using renewable
alternative fuels. In the present work, the effect of ethanol addition to gasoline on
the exhaust emissions and noise level has been experimentally investigated at
various engine loads.
Results of the engine test indicated that using ethanol-gasoline blended fuels
increases the power output of the engine dramatically (up to 50 %). While the CO
and HC emissions decrease as a result of the leaning effect caused by the ethanol
addition; and the CO2 emission increases because of the improvement of
combustion. Also, it was noted that the noise level emission increases slightly with
the increase of ethanol content. Finally, the results showed that ethanol can be used
as a supplementary fuel to gasoline in modern spark ignition engines without major
changes, and it can help to save our environment from toxic pollutants and to save
a considerable part of the available oil.