Experimental Evaluation of Common Rail Direct Injection Compression Ignition Engine with EGR Using Biodiesel

Abstract

India is poised to introduce the new Bharat Stage VI emission norms on its IC engines with effect from April 2020. Hence the study was undertaken to evaluate performance and emissions of a CRDI diesel engine using diesel, i.e. B0 and B25 blend with water-cooled EGR arrangement. Single-cylinder four-stroke direct injection engine was modified to common rail direct injection and EGR provision made with water cooling arrangement. The engine was run on petroleum diesel with and without EGR arrangement at five different loads from 0 to 100% of rated capacity. Similarly, the biodiesel prepared from Honge oils was used in B25 blend to run the engine at no load, 25, 50, 75 and 100% of rated capacity. The smoke emissions from engine running on diesel with EGR are greatly reduced in engine from 25 HSU to 1 HSU at full load operation vis a vis Non-EGR. Similarly, B25 with EGR has shown a 50% reduction in smoke when compared with without EGR from 3.4 to 1.7 HSU at full load operation. NO_x emissions increased after 50% of loading to 1800 ppm and 2000 ppm at full loads for diesel and B25, respectively, without EGR. With EGR one-third reduction in NO_x was observed at 600 ppm with both the fuels. CO and HC emissions show an increasing trend with EGR operations due to want of oxygen for combustion. To meet the upcoming Bharat Stage VI norms next year it is evident that EGR and three-way catalytic converters with after-treatment equipment like DPF will be essential to meet the stringent emission standards for diesel engines.