TY - JOUR
TI - Investigation of diesel engine for low exhaust emissions with different combustion chambers
AU - Ghodke Pundlik R
AU - Suryawanshi Jiwak G
JN - Thermal Science
PY - 2015
VL - 19
IS - 6
SP - 2013
EP - 2024
PT - Article
AB - Upcoming stringent Euro-6 emission regulations for passenger vehicle better  fuel economy, low cost are the key challenges for engine development. In this  paper, 2.2L, multi cylinder diesel engine have been tested for four different  piston bowls designed for compression ratio of CR 15.5 to improve in cylinder  performance and reduce emissions. These combustion chambers were verified in  CFD at two full load points. 14 mode points have been derived using vehicle  model run in AVL CRUISE software as per NEDC cycle based on time weightage  factor. Base engine with compression ratio CR16.5 for full load performance  and 14-mode points on Engine test bench was taken as reference for  comparison. The bowl with flat face on bottom corner has shown reduction 25%  and 12 % NOx emissions at 1500 and 3750 rpm full load points at same level of  Soot emissions. Three piston bowls were tested for full load performance and  14 mode points on engine test bench and combustion chamber ‘C’ has shown  improvement in thermal efficiency by 0.8%. Combinations of cooled EGR and  combustion chamber ‘C’ with geometrical changes in engine have reduced  exhaust NOx, soot and CO emissions by 22%, 9 % and 64 % as compared to base  engine at 14 mode points on engine test bench.