Uso de biogás como combustível alternativo em motor ciclo Otto.

Abstract

In view of the increase in the price of the petroleum, the researches searching of alternative fuels are being intensified more and more. Brazil owns biogas great availability derived of the anaerobic digestion of in the middle rural residues, of the urban garbage in the sewages treatment sanitary earthworks and systems in the urban centers. In this work was evaluated in dynamometer a cycle's motor Otto, fed with biogas, studying the characteristic curves of the motor to twists and power. Witnesses rehearsals were firstly done, with three kinds of fuels: gasoline, biogas and natural gas, using the systems made commercially available for these fuels , to be used as comparison with the other rehearsal studies . In followed rehearsal studies for the ignition several point combinations of were done, mixer of rate of the compression gases. By the analysis of the results can be concluded how the best result of power for biogas was obtained when it was used at a compression rate 12,5:1, mixer of long gases and ignition point advanced in 45, because in these terms it obtained the maxim power, superior to the original biogas.