Abstract

The search for alternative energy sources to reduce the use of diesel in the national energy matrix has been studied in a gradual way, with partial insertions of biodiesel to diesel. Parameters such as viscosity change when biodiesel is added to diesel, as this factor directly influences the atomization of the fuel. This paper aimed to evaluate the behavior of renewable biofuels in a 61 hp agricultural engine, by means of dynamometric tests, operating with mixtures of type A diesel S500 and biodiesel, including an analysis of pure diesel (0% biodiesel) and diesel blend with 20% biodiesel, heated with a system before the injection pump, at temperatures of 45 °C, 65 °C, and 85 °C. The highest values were maximum torque of 208.7 N m, maximum power of 55.3 KW, and specific consumption of 236.9 g KW h^-1 at 45 °C. The viscosities of the mixtures were also determined using the 40 °C test temperature, as suggested by ASTM D 445, followed by the ANP, as well as temperatures studied, and the cSt values of the blends at 65 °C and 85 °C were below the minimum limit established by ANP.

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