Effect of Injection Pressure on Performance, Emission and Combustion Characteristics of Direct Injection Diesel Engine Running on Blends of Pongamia Pinnata Linn (Honge oil) Oil and Diesel Fuel

Abstract

The growing concerns on the environment and the effect of green house gases have received more and more interests in the use of triglycerides and their derivatives as a substitute of fossil fuel.  Few literatures are available on the use of neat methyl esters of honge oil and blend with diesel fuel on diesel engine.  However, use of raw honge oil blend with diesel fuel on diesel engine with enhanced injection opening pressure appears to be scarce.  This research work presents some findings of the use of honge oil and diesel fuel blend in direct injection diesel engine with increased injection opening pressure.   The performance, emissions and combustion parameters of 20% honge oil and 80% diesel fuel (volume basis) were found very close to neat diesel fuel where as higher blend ratios were found inferior compared to neat diesel fuel.   Improved premixed heat release rate were noticed with H30 when the IOP is enhanced.  Performance and emissions with H30 are even better than neat diesel fuel at enhanced IOP.  With increased injection pressure amount of honge oil in blend can be increased from 20% to 30%.