Communication science et technologie
Volume 23, Numéro 1, Pages 45-60
2025-07-23

The Combustion And Emissions Characteristics Of Gasoline Engines With The Use Of Lpg: A Numerical Study



Authors : Benramdane Mohammed . Bouregueba Amel . Bousbaa Hamza .

Abstract

The invention of the spark ignition engine was an important step in the history of internal combustion engines. In recent years, gasoline engines have undergone undeniable development thanks to their exceptional efficiency. However, they emit pollutants such as HC and CO emissions. The application of pollutant emission standards is becoming more and more rigorous. In this context, this work presents a numerical study of the effect of using liquefied petroleum gas (LPG) in place of gasoline on spark-ignition direct injection engine characteristics, including combustion and emissions characteristics. In this study, we have based our work on the CONVERGE code 2.4 to study the phenomena that appear in the cylinder during the combustion phase in particular. The RANS approach is used. The combustion is described by the SAGE model, the spray by the KH-RT model, and turbulence, ignition, and the formation of NOx and soot by the RNG models k-ε, Hiroyasu, and Zeldovich, respectively. The numerical results compared to the situation of gasoline fuel showed that the peak pressure and heat release increased. An earlier combustion starting occurrence and closer to the top dead center (TDC) is noticed compared to gasoline. The cylinder temperature increased by 6%, and heat release decreased by 3%. For the emissions pollution, the NOx, soot, CO, and CO2 emissions decreased when using LPG by 16.5%, 59%, 75%, and 20%, respectively, compared to gasoline.

Keywords

Spark ignition engine ; Liquefied Petroleum Gas ; direct injection ; combustion ; CONVERGE V2.4

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