An experimental study of the optimum mixing ratio in twostroke engine by analyzing exhaust emission

Abstract

Laboratory experiments are done at Karari University for single cylinder two stroke engine used an oil benzene mixture as fuel. Analyze the exhaust gas components is done by using a gas analyzer device to determine the amount of exhaust emission, and dynamometer is used to read the engine speed (rpm) at different engine speeds and different mixing fuel ratios. The gasses that are analyzed are: Nitric Oxides (NOx), Carbon Monoxide (CO), Carbon Dioxide (CO2) and Hydrocarbons (HC).Over at speed between (1500-2500 rpm), it found that there this a decrease in the quantity of each of Nitrogen Oxide (NOx) and Carbon Dioxide (CO2) emitted from the exhaust gasses and when the increase in engine speed. In the cause of Carbon Monoxide (CO) and Hydrocarbons (HC) it found that it increase when the increase in engine speed. But when the increase in oil fuel mixing ratios, it found that there is an increase in the quantity of each of Nitrogen Oxides (NOx), Carbon Dioxide (CO2), Hydrocarbons (HC) and Carbon Monoxide (CO) , According to this study we found the optimum oil/fuel mixing ratio is (1:25) (5ooml of fuel per 20ml of oil) depended on law exhaust emission and it equivalent (for every gallon (4000ml) need (20ml) of oil) in the labor market of the users of two- stroke engine.