Abstract:
Bi-Fuel can be defined as the simultaneous combustion of two fuels. In the case of the Bi-Fuel System, natural gas (methane as based fuels) is utilized in conjunction with diesel fuel to operate the engine.
In this research LPG air mixes have been used in the air intake manifold at different concentration level while the diesel injection through injector at the end of compression stroke.
Results of experimental test indicated that using diesel fuel and diesel fuel with LPG, decreases the diesel fuel consumption relative to single diesel fuel by the following percentages 75% at 1600 rpm and torque 100 N.m, 42% at 1800 rpm and torque 105 N.m , 39% at 2100 rpm and torque 110N.m. This percentage produced the optimum power and power efficiencies same as single diesel fuel as follow: 16.75 KW and 39.38% at 1600 rpm, 19.8 KW and 37.1% at 1800 rpm, 24.19 KW and 36.5% at 2100 rpm.
Analysis of the exhaust emission characteristics for the fumigate and diesel fuel, shows that the pollutants (CO, NOx , SO2 ) as follow: CO 1024 ppm and SO2 21 ppm.
Finally when we used the LPG with Diesel fuel will reduce the diesel consumption and at the same time we get the same result of power and efficiency when we used the diesel alone without any effect in engine performance.
