Experimental investigation of oxygen enrichment on performance of twin cylinder diesel engine with variation of injection pressure

The impact of oxygen enrichment of the inlet air have been examined in laboratory tests on a direct injection diesel engines to study the combustion efficiency, power and performance of the engine. Increasing the oxygen content with the air leads to faster burn rates and also the ability to burn more fuel at the same stoichiometry. Added pure oxygen in the combustion air also leads to shorter ignition delays and offers more potential for complete burning of diesel. The experiment was carried out at different oxygen percentages using regulated oxygen induction from oxygen cylinder. Performance test was carried out in the twin cylinder engine for different loads and with various injection pressures. The results show that there is considerable improvement in power output and thermal efficiency of the engine with increased oxygen concentration and injection pressure while NOx emission increased pro rata with the oxygen added.