Influence of injection timing on torroidal re-entrant chamber design in a single cylinder DI engine fuelled with ternary blends

Abstract

The present experimental work focuses on the influence of injection timing on torroidal re-entrant chamber design in a single cylinder diesel engine fuelled with ternary fuel (diesel-biodiesel-ethanol) blend. Ternary fuel is transformed to a high performance fuel (HPF) by addition of alumina nano additives. Experiments were conducted on HPF subjected to various injection timings of 21obTDC (Retarded injection timing), 22obTDC (Retarded injection timing), 23obTDC (standard injection timing) and 24obTDC (advanced injection timing) respectively at torroidal re-entrant combustion chamber design (TRCC) and were compared with base fuel diesel. Based on experimentation, it is observed that, BTE is lowered for 21obTDC and 24obTDC by 4.53% and 1.22% while highest BTE of about 33.8% is achieved for 22obTDC in comparison with other blends such as DIESEL-HCC23 (32.75%), HPF-TRCC21 (31.41%) and HPF-TRCC24 (32.53%). Lowest BSEC profile was achieved for HPF-TRCC22. HPF-TRCC22 resulted in lowered HC and CO emissions of about 9.18% and 16.83% in comparison with HPF-TRCC23. HPF-TRCC21 resulted in lowered NOx emissions by 22.53% along with higher HC and CO emissions by 6.13% and 20.51% in comparison with HPF-TRCC23. Cylinder pressure and HRR of HPF-TRCC22 stays at an acceptable range of 75.42 bar and 85.34 J/deg. CA in comparison with other test blends.