Análise de estabilidade de combustão em um motor de combustão interna dual fuel diesel-etanol

Abstract

The present work introduces the study and analysis of the operation of a compression ignition internal combustion engine running in dual fuel mode, using diesel and ethanol as fuels. Given the current scenario of growing environmental concern and the need to reduce pollutant gas emissions from diesel engines, the use of ethanol as a complementary fuel emerges as a promising alternative. Ethanol, being a renewable fuel with a low cetane number and high-octane rating, presents favorable characteristics for application in Reactivity Controlled Compression Ignition (RCCI) combustion, where diesel acts as the high-reactivity fuel responsible for initiating the combustion of the mixture. The effects of the partial substitution of diesel by ethanol on combustion will be investigated, with a focus on combustion stability. The addition of ethanol proved to be an option to reduce peak pressure inside the cylinder and burning velocity, maintaining combustion stability within the limits stipulated in the literature, under specific engine operating conditions.