Hydroxy (HHO) and hydrogen (H2) enriched compressed natural gas (CNG) usage in biodiesel fuelled compression ignition (CI) engines

Reduction of diesel fuel dependency is intended with more environmentally friendly and economical methods in this experimental thesis. For this purpose, canola oil methyl ester (COME) and palm oil methyl ester (POME) are produced and blended with standard diesel fuel at various volumetric ratios (25%, 50%, 75% and 100%). Beside, pure hydrogen, hydroxy (HHO) and compressed natural gas (CNG) fuels are used with different volumetric flow rates. The amount of liquid fuel injected into the cylinders is reduced by 15%-30% via fuel pump plunger pin without structural changes on the diesel engine with controlled by stepping motor and devices. Instead of the reduced liquid fuel, 15%, 25% and 35% (by volumes) Hydroganated (H2 and HHO) gases mixed with CNG; and supplied by using mixture chamber before intake manifold of the test engine. Engine performance and exhaust emission graphs and terms are included in order to avoid the difficulties on fuel mixtures definitions. Results were compared and discussed with optimum amount of diesel injection and optimum mixture percentages. As a result; HHOCNG is firstly examined with pilot biodiesel injection and results were explored in-depth.