Exhaust Gas Recirculation in CI Engines
Journal Title: International Journal for Research in Applied Science and Engineering Technology (IJRASET) - Year 2015, Vol 3, Issue 3
Abstract
Exhaust Gas Recirculation (EGR) is being widely used to reduce and control the oxides of nitrogen (NOx) emission from diesel engines. When combustion chamber temperature reaches 2500ºF or 1370ºC, nitrogen and oxygen combine to form oxides of nitrogen (NOx). EGR controls the NOx because it lowers oxygen concentration and flame temperature of the working fluid in the combustion chamber. By this fuel economy and engine efficiency had been increased. But due to the over accumulation of carbon from the exhaust gas in the engine, creates consequences like knock and tears in the engine and even lead to the engine failure. As a solution for this issue we are introducing a small variation in the present EGR by fixing a carbon filter to separate the carbon content from the exhaust gas. The improvement in fuel consumption with increasing EGR is due to three factors: firstly, reduced pumping work; secondly, reduced heat loss to the cylinder walls; and thirdly, a reduction in the degree of dissociation in the high temperature burned gases. The use of EGR is, therefore, believed to be most effective in improving exhaust emissions.
Authors and Affiliations
Edwin Jose, Muhammed Muhais A, V. Ravikumar
Keywords
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