INFLUENCE OF BIO-ETHANOL ON THE CHARACTERISTICS OF COMBUSTION AND EMISSIONS IN A GASOLINE PARTIALLY PREMIXED COMBUSTION (GPPC) ENGINE UNDER LOW LOADS

Abstract

Recent studies on internal combustion engines have focused on solutions to
reduce fuel consumption and harmful emissions, with the low-temperature
combustion (LTC) technique, there are the outstanding advantages: efficiency and
emissions. Gasoline Partially Premixed Combustion (GPPC) are a type of LTC
technique, with the basic characteristic of injecting gasoline fuel at high injection
pressure and promoting the self-ignition process of the partially mixed gasoline-
air mixture through compression, as potentially capable of simultaneously
reducing fuel consumption and harmful emissions compared to traditional diesel
engines. This article focuses on studying injection strategies for GPPC engines to
evaluate the effects of ethanol blends with gasoline on the combustion
characteristics and emissions of the engine at low load. The research findings
indicate that: (1) increasing the first fuel injection reduces smoke emissions, while
HC and CO increase with the test fuels, and (2) the ethanol component leads to
higher emissions of harmful HC and CO, but reduces smoke emissions by 50%.