Abstract
An investigation was made to determine the effects of ethanol at ultra-lean effective systems utilizing an experimental study. The present study is planned to develop and evaluate the performance, emission and combustion characteristics of the ultra-lean burn Internal Combustion engine was modified to operate on ethanol blends fuels. The study looked at part throttle, constant speed operation of 0%, 10%, and 15% ethanol blends with gasoline mixtures operating in ultra-lean operating systems. In experiment practice the use of homogeneous lean mixtures in engine has been handicapped by several difficulties. The most serious one is that the flame propagation through mixtures becomes gradually slower as the mixture becomes leaner. The mixture distribution in a multi-cylinder engine is a problem because even small variation in mixture ratio on the linear side will strongly effect power output. Enhancement of lean combustion of homogeneous mixtures can be achieved by (i) using ethanol blends with gasoline (ii) using high-ignition energy (iii) providing high compression ratios (iv) creating high swirl in the combustion chamber.
Highlights
Clean, high efficiency co mbustion technology is one of the most realistic and effect ive remed ies for the current global environ mental and energy problems since fossil fuels account for a large proportion of the world’s total primary energy resources
Emissions fro m engine-out are a strong function of fuel supply control, and the best way to achieve accurate fuel quantity metering is by inject ion fuel
An increase of 10.1% in the indicated power for 15% b lend is noticed co mpared to gasoline and 10% blend respectively
Summary
High efficiency co mbustion technology is one of the most realistic and effect ive remed ies for the current global environ mental and energy problems since fossil fuels account for a large proportion of the world’s total primary energy resources. In an attempt to reduce fuel consumption and engine-out emissions fro m s mall air cooled engines, lean burn technology had already existed investigated by small motorcycle engine manufacturers [4,5,6,7,8]. Me of these expert ise include use of o xygenated or emulsified fuels, air-assisted fuel inject ion for better ato mizat ion of the fuel droplets, and use of catalytic material in the combustion chamber to accelerate combustion. Ultra-lean co mbustion increases thermal efficiency and decreases emissions, it typically decreases power output
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