Effect on Performance, Combustion and Emission Characteristics of Spark Ignition Engine Powered by Premium Level Gasohol- Paraffin Blends With Spark Advancement & Spark Retardment

Abstract

Internal combustion engine emissions from burning fossil fuels, particularly those from petrol engines, are a major factor in change in the climate and the generation of greenhouse gases. For a long time, ethanol has been noticed as a viable alternative to gasoline that might also help to lower pollution levels. In the current experimentation investigations, the engine performance, combustion, and emission characteristics were assessed for the various ethanol-premium gasohol blends with partial addition of alkane’s such as n-pentane, hexane etc. With addition of hexane and n-pentane in premium gasoline and ethanol blends, carbon monoxide (CO) emission decreased by 18% than premium gasohol. The lowest emission were observed for premium gasoline with 40% ethanol and 10% n-pentane. It was observed that addition of hexane and n-pentane hydrocarbons found to be decreased by 15% as compared to premium gasool. Furthermore, with addition of ethanol blending, cylinder pressure decreased. Both unburned hydrocarbon (HC) and Nitrogen oxides (NOx) increased in spark advancement from 21 to 15° bTDC and became minimum for spark timing 21° bTDC. Again, it increased from spark retardment from 21° to 30° bTDC. This was because there was incomplete combustion takes place. But engine emissions decreased with partial addition of alkanes with premium gasoline and 20% ethanol with spark advancement as well as retardment. The brake thermal efficiency of PG + 10% P were found maximum. The oxides of nitrogen (NOx) were found minimum by 25% with addition of ethanol and paraffin in premium gasoline.