Energy performance of an agricultural articulated tractor: Manual and automatic modes/Desempenho energetico de trator agricola articulado: Modo manual versus automatico

Automatic production management (APM) is a tool that assists in the operations of agricultural tractors, increasing yield and energy efficiency. The objective of the experiment was to compare the energy and operational performance of a 373-kW articulated tractor equipped with APM and manual mode of...

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Published in:Revista brasileira de engenharia agrícola e ambiental 2023-10, Vol.27 (10), p.772
Main Authors: Zimmermann, Gabriel G, Jasper, Samir P, da Costa, Mariane C, de Oliveira, Gabriel A, Savi, Daniel
Format: Article
Language:English
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Summary:Automatic production management (APM) is a tool that assists in the operations of agricultural tractors, increasing yield and energy efficiency. The objective of the experiment was to compare the energy and operational performance of a 373-kW articulated tractor equipped with APM and manual mode of engine transmission and rotation, across different real-world speeds. The experiment was conducted in a randomized block design with five replicates, using a split-plot arrangement with two system modes (manual and automatic) in the plots and four realworld speeds (4, 6, 8, and 10 km [h.sup.-1]) in the subplots, totaling 40 experimental units. The evaluated variables were: wheel slippage; engine rotation; hourly and specific fuel consumptions; drawbar force, power, and yield; operating speed; and engine thermal efficiency. The variance of the data was analyzed using Tukey's test for the first factor, and regression analysis for the second factor and interactions. The automatic mode showed lower engine rotation and wheel slippage without compromising the other variables. The use of this mode showed energy advantages at 4 and 6 km [h.sup.-1] by resulting in less fuel consumption per hour. In addition, the manual mode presented higher thermal efficiency at lower speeds than the automatic mode, which showed a linear increase. Key words: engine rotation, fuel consumption, engine thermal efficiency O gerenciamento automatico de produtividade (APM) presente no trator agricola e uma ferramenta importante que auxilia na operacao, aumentando a eficiencia e rendimento energetico. O objetivo do experimento foi comparar o desempenho operacional e energetico de um trator articulado de 373 kW equipado com APM e com o modo manual da transmissao e rotacao do motor, sob diferentes velocidades reais. O experimento foi conduzido no delineamento de blocos casualizados em esquema de parcelas subdivididas, sendo as parcelas constituidas de dois modos de transmissao (manual e automatico) e as subparcelas de quatro velocidades reais (4, 6, 8 e 10 km [h.sup.-1]), com cinco repeticoes, totalizando 40 unidades experimentais. Foram monitorados a patinagem dos rodados, rotacao do motor, consumo horario e especifico de combustivel, forca, potencia e rendimento na barra de tracao, velocidade operacional e eficiencia termica do motor. Os dados coletados foram submetidos a analise de variancia, sendo o primeiro fator analisado pelo teste de Tukey, e o segundo fator e as interacoes por analise de
ISSN:1415-4366
1807-1929
DOI:10.1590/1807-1929/agriambi.v27n10p772-778