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ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
THE USE OF EGR AND THE INFLUENCE OF ITS TEMPERATURE ON SPARK-IGNITION ETHANOL ENGINES
Submission Author:
Luana Camargos , SP , Brazil
Co-Authors:
Luana Camargos, Antonio Pacifico, Clayton Zabeu
Presenter: Luana Camargos
doi://10.26678/ABCM.ENCIT2020.CIT20-0564
Abstract
The use of EGR is currently well known as a promising method for modifying the combustion process to reduce NOx emissions. However, many variables still need further exploration to determine their degree of influence on this technique. In this sense, this work experimentally explores the influence of the exhaust gas recirculation temperature on the combustion & gas exchange processes, efficiency, and emissions of a PFI engine. The tests were conducted with a 3-cylinder engine, of 1,2L of volumetric displacement using ethanol as fuel. The results indicated significant reduction in NOx and efficiency increase in Otto cycle at some EGR rates. The increasing EGR temperature shows a reduction in pumping work but demonstrates an efficiency decrease in the positive work of the cycle.
Keywords
Exhaust gas recirculation, pollutant emissions, Spark ignition engines, Efficiency increase, ethanol, EGR temperature
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