Experimental analysis of the combustion and gas emission phenomenal in engine burning alcohol and gasoline as fuel

Author(s)

Felipe Soto Pau

• Document type: Doctoral Thesis
• Press: São Carlos.
• Institution: Universidade de São Paulo (USP). Escola de Engenharia de São Carlos (EESC/SBD)
• Defense date: 2003-04-25

Examining board members

Antônio Moreira dos Santos; Francisco Emilio Baccaro Nigro; Josmar Davilson Pagliuso; Fabio Moreira da Silva; Duilio Venanzi

• Advisor: Antônio Moreira dos Santos

Abstract

The use of alternative fuels in Internal Combustion engine, seeks the substitution or the reduction of the consumption of fossil fuels. Any study of the development of methods and techniques that it improves the acting of the motors using alternative fuels are of great technological, economic and social importance. With this goal, it was made this research work, which consists of tests in an engine using blends of 37% and 50% of ethanol in the gasoline. The ethanol used in this work presented an alcoholic degree of 92 INPM approximately. The tests were made in compression ratio 8:1, 9.5:1 and 11:1. The influence of the different parameters was evaluated for a maximum of efficiency and a minimum of pollution, taking advantage of the advantages of both fuels, since, the gasoline has high PCI and low octane index, and the ethanol low PCI and high octane index. The ideal fuel should have high both factors. To verify the expected results, they were done in this work, studies kinetic chemists of the combustion starting from engine performance and generation of gases. To execute this goal they were necessary studies that include the diagnostics of the combustion process, since, the diagnostics of the combustion process supplies all the necessary information, to the analyses of engine critical aspects operation and emissions. Was proven that the speed of the ethanol reaction of oxidation is larger than gasoline and that the engine takes advantage of more the ethanol chemical energy that of the gasoline. (AU)

• FAPESP's process: 98/13542-4 - Experimental analysis of the phenomena of combustion and of the emission of gases in internal combustion engines using mixtures of alcohol and gasoline as a fuel
• Grantee: Felipe Soto Pau
• Support Opportunities: Scholarships in Brazil - Doctorate