Assessment of Efficiency of an Agricultural Tractor Engine for Different Rotational Speeds
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Within the framework of this paper efficiency of the S-4003 engine Ursus C-360 tractor was evaluated in terms of variation of its rotational speed. The proper use of the engine operating parameters according to various agrotechnical conditions is consistent with the concept of sustainable agriculture, which assumes rational management and the least harm to the environment. Higher engine efficiency results in less fuel consumption. Engine tests were performed on a dynamometer bench at the engine test stand, based on load characteristics, for the speed range from the maximum torque (1600 rpm) to the rated one (2200 rpm), at every 150 rpm. The fuel (Ekodiesel Ultra D) calorific value was determined using the KL-12 calorimeter produced in Poland. It was found out that the highest efficiency of the tested engine was achieved for the intermediate speeds from 1750 to 1900 rpm.
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