Análise experimental do rendimento global obtido para um motor com sistema tetrafuel operando com diferentes combustíveis.

Abstract

Brazil has established as one of the main automobilistic consumer markets of the world with a internal production lager than 3 million vehicles per year. The fuels in the automotive sector are traditionally derived from petroleum. From this scenario of dependence on fossil fuels, the industry and the consumer market have sought alternative energy sources to substitutes these petroleum derived fuels. Following the trend of diversifying the energetic matrix, flexfuel vehicles are presented as a viable alternative. For a more intelligent use of each energy source it is important to perform a comparative analysis of the global performance obtained for each energy source into a Otto cycle engine with Tetrafuel system, operating with four different commercially available fuels in the national market. Experimental tests were performed on standard a Fiat Siena 1.4 Tetrafuel, operating with the following fuels: C gasoline, ethanol, natural gas and a mixture of 50% by volume of ethanol with 50% of C gasoline. To obtain the characteristic curves of the engine operating separately with each fuel, it was used the chassis dynamometer from the automotive laboratory of the Center of Gas Technology and Renewable Energies in Natal-RN. The obtained results, for each fuel, were comparative analyzed for each measured property. The essays results indicated that the ethanol presented the best global performance among the tested fuels.