The impact of injection pressure on diesel engine with various alcohol-diesel blends has been investigated by some researchers.
Studies show that delayed fuel injection did not significantly affect NOx emissions and smoke opacity, but resulted in higher HC and CO emissions and BSFC.
Canakci et al. investigated the impact of fuel injection pressure of methanol-diesel fuel blend on the emission, combustion and performance characteristics of diesel engine at different loads.
Test results indicated that NOx and carbondioxide emissions increased with the increase of injection pressure, whereas smoke, HC and CO emissions decreased.
Can et al. examined the effect of ethanol-diesel fuel blends with different mixing ratios on emissions at full engine load and using varied fuel injection pressures.
They reported that increasing the pressure of injection of a diesel engine operated with ethanol-diesel fuel blend reduced smoke density and CO emissions while increasing NOx emissions.
