Abstract
ABSTRACT This study analyzes the statistical significance tests on an emulsion with 30% water content (E30). The use of E30 fuel at standard injection timing conditions (13° CA BTDC) leads to a more extended ignition delay period with the process extending further from the upper dead spot (TDC). Therefore, to determine the impact of this process on engine performance and exhaust gas emissions, it is necessary to set injection timing ranging from 13°, 15°, 17°, and 19° CA BTDC with engine load. Furthermore, to identify errors in data retrieval, the average value measured was compared using Duncan’s multi-range test (DMRT). E30 combustion significantly increased engine power at a probability level of 1% (P < .01). The optimal power and BMEP was at 17° CA BTDC, with an average increase of 4.2%. The result showed that the optimum SFC and thermal efficiency were at 17° CA BTDC, with a decrease in SFC by 17.55%, and an increase in thermal efficiency by 13.77%. The decrease in SFC was due to complete combustion of the fuel and the optimum injection timing. Furthermore, a significant decrease (P < .01) was recorded in the combustion emissions by advancing injection timing of 17° CA BTDC, HC emissions of 17.17%, CO 12.44%, and smoke by 58.57%. Therefore, the smoke reduction due to the vapor from the combustion was bound on the soot on the exhaust gases.
Published Version
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