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INSTRUMENTAÇÃO DE UMA BANCADA DINAMOMÉTRICA PARA ANÁLISE DE COMBUSTÍVEIS EM UM MOTOR DE COMBUSTÃO INTERNA
Simone Venturini , RS
Co-Authors: Luiz Felipe Santana, Charles Rech, Cristiano Maidana, Juan Galvarino Cerda Balcazar, Giovani Leone Zabot, Pericles Balafa, Simone Venturini
Presenter: Luiz Felipe Santana
This article presents a methodology for dynamometer workbench instrumentation for fuel analysis in internal combustion engines. The project is justified by the need to design low cost dynamometric equipment, with high resolution for measuring torque, power and specific fuel consumption in engines. Thus, electromechanical components were used to measure the force that reacts to the activation of a Foucault brake, coupled to the axis of a Honda-GX 35 engine, and a photometric sensor to obtain the rotation. For data acquisition, an Arduino UNO microcontroller is used, with its respective developed program, which performs the workbench communication in real time with spreadsheets in the Excel® software, where the obtained power, torque and specific consumption values are stored and presented graphically. The instrumentation of the dynamometric bench allows, in addition to measurements with high reliability, reduced implementation cost - when compared to other equipment available on the market. Initially, original values, specified by the engine manufacturer, were compared with data measured on the bench, obtaining percentage differences of 3.75% in maximum torque and 6.50% in maximum power. The static uncertainty of the bench calculated according to the methodology described by Kline McClintock, was 28.36 W for maximum power, which is equivalent to a maximum uncertainty percentage of ± 2.59%.
Instrumentation, Dynamometric workbench, INTERNAL COMBUSTION ENGINES, electronic management, fuel analysis