EVALUATION OF DEBRIS ACCUMULATIONS ON EXHAUST VALVE USING GREEN FUEL

Abstract

Used cooking oil is a desirable substitute for compression ignition engines, according to short-term engine running experiments. To ascertain the long-term impacts of burning spent cooking oil, the study employed blends of waste cooking oil in a long-term endurance test. The study's findings demonstrated that the engine head's working surface had comparatively little wear and tear. However, the durability test was conducted using diesel and waste cooking oil mixtures. The lowest cetane number, DF60UCO20Pn20, has the shortest burning time and the longest explosion delay due to its highest fuel oxygen content. Engine head deposits were measured and compared to emulsion fuels. Using scanning electron microscopy techniques, a qualitative investigation was conducted at the same locations. The investigation concluded that visual inspection showed some deposits on the exhaust valve when operating on all fuels. Using SEM and EDS, the study found that DF95UCO5 produced more carbon deposits on the engine head than DF60UCO20Pn20 and DF.