Effect of Oxygen Enrichment on Emission Characteristics of a Variable Compression Ratio Diesel Engine
Journal Title: International Journal for Research in Applied Science and Engineering Technology (IJRASET) - Year 2017, Vol 5, Issue 7
Abstract
The objective of this research is to explore the effect of oxygen enrichment on emission characteristics for a single cylinder variable compression ratio diesel engine. In this study, a computerised test rig with data acquisition system for a variable compression ratio engine connected with eddy current dynamometer and additional oxygen cylinders to supply the constant oxygen supply by gas regulator in intake air near to intake manifold were used to explore the emission changes by varying compression ratios and oxygen concentrations. Tests were carried out to study the magnitudes of Carbon Dioxides (CO2), Carbon Mono-oxides (CO), Oxides of Nitrogen (NOx) and Hydrocarbons (HC) at two rated Compression Ratios (CR) 16:1 and 17:1 to compare the results with or without oxygen enrichments at the constant rate of 1 litre and 2 litres per minute. However both the techniques increases the NOx emission levels because the enriched air increases the burn and mixing rates of mixture so the temperature increases but also decreases the amount of HC and CO emissions. CO emission decreases because of increase in complete combustion reaction in presence of higher oxygen concentration so the level of CO2 emission increases.
Authors and Affiliations
Jitin Yadav, Manu Gupta
Keywords
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