Abstract
ABSTRACT The operational performance of the agricultural tractor can be increased by adjusting parameters such as tire inflation pressure, axle mass distribution and gauge opening, which is a very divergent factor in controlled-traffic production. The objective of the experiment was to measure the energy performance of a 93 kW agricultural tractor in intermediate grading operation in two slopes (flat and sloping) and three gauge configurations (closed, intermediate and open) in mobilized soil. Energy performance was determined from the following parameters: slip, engine speed, actual effective speed, hourly and specific fuel consumption; strength, power and performance on the drawbar. Turbo pressure and temperature monitoring was also performed at six different engine points. The experiment was conducted in double factorial arrangement (2 slopes and 3 gauges), with four replications, totaling 24 plots. Data were analyzed for normality and homoscedasticity of the residues, after ANOVA and when significant, the means test. Tilts and tire gauges did not differ statistically, so it can be concluded that depending on the operation do not interfere with operating performance.
Highlights
The modernization of agriculture in recent years allowed using mechanized assemblies in many agricultural operations
The present study evaluated the energy performance of a 93 kW agricultural tractor with an offset disk harrow using three tread widths in two terrain slopes in soil without vegetation cover
drawbar force (DF), drawbar power (DP), drawbar performance (DPF), and specific fuel consumption (SFC) were significantly different between the different tread widths analyzed, whereas wheel slip (WS), motor rotation (MR), actual travel speed (ATS), and hourly fuel consumption (HFC) were not affected by this parameter
Summary
The modernization of agriculture in recent years allowed using mechanized assemblies in many agricultural operations. Girardello et al (2017) evaluated soil resistance to penetration, root development, and soybean yield using traffic-controlled farming and concluded that several passes of the machines on the same traffic lane reduced the length of the crop root system. This result was more evident on permanent traffic lanes, enabling localized corrections. Another factor that affects the energy performance of the agricultural tractor is terrain slope, and this geomorphological feature directly limits the mechanization potential in agricultural areas. The present study evaluated the energy performance of a 93 kW agricultural tractor with an offset disk harrow using three tread widths in two terrain slopes in soil without vegetation cover
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