The Effect of Using LPG in a SI engine instead of using Gasoline fuel

Abstract

The fossil fuels used in internal combustion engines are among the largest contributors to environmental degradation, and this fuel has a high economic cost, so the need to use alternative fuels with less environmental impact and less cost-effective cost. Therefore, researchers resorted to using different kinds of alternative fuels, including liquefied petroleum gas. This study provides a practical study comparing the use of LPG and gasoline in terms of performance and emissions from the four-stroke spark ignition, single cylinder, air cooled with a constant pressure ratio and variable-speed 1500-2500 rpm. A difference in volume efficiency, the brake thermal efficiency, fuel consumption and emissions of gases (HC, NOx, CO2, CO) has been measured that results have shown improved fuel consumption and thermal efficiency when using LPG fuel compared to pure gasoline. In contrast, the volume efficiency showed negative results when using LPG. the results also showed an improvement in LPG emissions in HC, NOx, CO2, CO with the use of LPG.