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Effect of ethanol-gasoline blends on adsorption/desorption process in SI engine MNNIT ALLAHABAD
- Format:
- Book
- Conference/Event
- Author/Creator:
- Kushwaha, Garima, author.
- Conference Name:
- SAE Powertrains, Fuels & Lubricants Digital Summit (2021-09-28 : Live Online, Pennsylvania, United States)
- Language:
- English
- Physical Description:
- 1 online resource cm
- Place of Publication:
- Warrendale, PA SAE International 2021
- Summary:
- The hydrocarbon (HC) formation in Spark Ignition (SI) engine is dependent on many mechanisms that allow the fuel to escape combustion. Some of these mechanisms are adsorption/desorption of fuel in oil layer, flame quenching, fuel escaping into crevices and accumulation of fuel in engine deposits, et cetera Out of these, the oil layer adsorption and desorption mechanism contribute to about 25-30% of total engine-out HC emissions. In this study an effort has been made to investigate the effect of blending ethanol with gasoline on oil layer adsorption/desorption mechanism and consequently on HC emission. The blends used for the study are E0, E5, E10, and E15. The study is carried out with the help of a mathematical model that predicts the fuel adsorbed/desorbed in the oil layer of an engine for all the four strokes. Thereafter, experiments are conducted on a single-cylinder gasoline engine. The experimental results are compared with the predictions of the simulation model data at different operating conditions of the engine. The range of fuel adsorbed in the oil layer varies from 0.46% for E0 fuel to 0.35% for E15 fuel. Similarly, the desorbed fuel ranges from 0.45% to 0.29% as ethanol fraction is increased from 0% to 15%. Though the fuel adsorbed/desorbed in the oil layer decreases with an increase in ethanol fraction, the amount of fuel stored in the oil layer (id est, the difference between adsorbed and desorbed fuel) increases from 0.01 % to 0.06 %. Hence, ethanol blending reduces HC emission due to oil layer adsorption/desorption, but it degrades the quality of lubricant due to more fuel stored in the oil layer. It has been found that the adsorption/desorption of fuel in the oil layer decreases with ethanol fraction due to reduced solubility of ethanol in oil
- Notes:
- Vendor supplied data
- Publisher Number:
- 2021-01-1184
- Access Restriction:
- Restricted for use by site license
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