Abstract
Problem statement: The effects of excess feeding oxygen to the fuel-air mixture on the exhausts gasses emissions concentrations are investigated here. It is known that spark-ignition and diesel engines are considered as major sources of urban air pollution; such pollutants are CO2, CO, HC. Hence, many techniques have been used to decrease such emissions such as: Catalytic converters, oxidizers, traps and Diesel Particulate Filters (DPF), but these techniques have some disadvantages represented by: Forming back pressure which affects the engine performance, plugging and high costs. Approach: In present study the effects of feeding more oxygen to the combustion mixture is studied experimentally. Results: It was found from tests applying on an engine that excess oxygen has positive results in decreasing concentration of both CO and HC's. Conclusion/Recommendations: CO2concentration at oxygen injection test is greater than that at without oxygen injection at the two cases: With load and without load tests and at nearly all engine speeds. CO concentration at oxygen injection test is much less than that at without oxygen injection at the two cases: With load and without load tests and at nearly all engine speeds. HC concentration at oxygen injection test is less than that at without oxygen injection at the two cases: With load and without load tests and at nearly all engine speeds. It also recommended using more amount of oxygen in the future to find the optimal value of oxygen can be fed and if anther fuel additives can be used.
Highlights
If you look for minutes and imagine how much these vehicles on the streets are producing emissions, These, in turn, can be strongly influenced by the you will know what will be our environment for just following: year
In the present study CO2%, HC and CO% are measured in two cases with load engine and without load engine and with excess oxygen or without oxygen feeding
In the contrary if there is a load in both cases with oxygen or with no oxygen the CO2 % decreases as engine speed increase
Summary
If you look for minutes and imagine how much these vehicles on the streets are producing emissions, These, in turn, can be strongly influenced by the you will know what will be our environment for just following: year. Emissions from such engines are huge and contribute really in global worming. Pollutant emissions can be substantially reduced by carefully controlling the characteristics of engine operation, combustion. Many writers showed that the exhaust emissions will be reduced as the oxygen content is increased in the fuel-air mixture but no. Combustion phasing and adiabatic flame temperature were carefully matched to isolate (as much as possible) the effects of oxygenate molecular structure on combustion and soot-formation processes.[5], [6]
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