Abstract
Ethanol is a possible substitute for gasoline and mixes well with it. In this experiment, several ethanol-gasoline fuel blends were compared to straight gasoline to see how they affected the performance of spark-ignition engines. At varying spark timings of 15°, 18°, 21°, 24°, and 30° bTDC, experiments were performed using E0, E20, E40, and E60 fuel with and without a partial addition of n-pentane. Without modifying the engine, the rising percentage of ethanol in fuel blends—from E0 to E60—gave promising results. While NOx, CO, and HC emissions are reduced as the ethanol blend increases from E0 to E60, different spark timings demonstrated erratic tendencies in emission characteristics. In gasoline mixes, it was discovered that 10% n-pentane reduced engine emissions. The E20 fuel blend at 24 bTDC provided the most promising results among all the fuel blends without modifying the engine.
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