Effect of fuel injection pressure on the diesel engine fuelled with Moringa oleifera oil biodiesel blends: vibration and noise study

The purpose of the present study is to estimate the vibration and noise intensity of a single-cylinder direct injection diesel engine. The experiment was performed by varying the fuel injection pressures (FIP) such as 200 bar, 220 bar, and 240 bar respectively with four test fuel samples of Moringa oleifera oil biodiesel blends; BD0D100, BD10D90, BD20D80, and BD30D70. The intensity of vibration and noise has come down with the blends of Moringa oleifera biodiesel than regular diesel fuel (BD0D100). Besides, the increase in FIP looked at lower levels of vibration and noise disregarding fuel blends. Both the vibration and noise intensity was seen least with the BD20D80 fuel blend than leftover samples. The slightest RMS velocity and RMS noise were seen by 0.104 m/s and 39.71 dB correspondingly for BD20D80 than ordinary diesel at a FIP of 240 bar. Hence, the compression ignition engine can be operated with the BD20D80 fuel blend devoid of any amendment in the engine for the inferior vibration and noise.