Combined effect of injection timing, EGR and injection pressure in NOx control of a stationary diesel engine fuelled with crude rice bran oil methyl ester

► Reduction in Biodiesel NOx with less effect on smoke and thermal efficiency. ► Combination of EGR injection timing and pressure for NOx control at different loads. ► Most influencing factor for reduction of NOx with less effect on smoke and BTE. ► Employing DOE and Taguchi's Orthogonal Array in engine testing. ► Optimization of NOx emission through MRSN ratio and Taguchi parametric design.