Energy Performance in Disc Harrowing Operation in Different Gradients and Gauges

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.

Agricultural tractor traction efficiency by changing the mass distribution between axles and speed

“…Using Autonics E100S encoders, it was possible to determine the tractor's four driving wheels' slip. Being obtained, through the rotations of the wheelsets, with and without load, and determined, according to Oiole et al (2019).…”

“…Using a Bermann load cell, with a capacity of 100 kN and a sensitivity of 2.0+0.002 Mv V -1 with a precision of 0.01 kN, installed on the tractor drawbar, it was possible to measure the force on the drawbar. The average force on the drawbar was determined by the ratio between the instant traction force and the number of recorded data (Oiole et al, 2019). With the Vansco 740030A radar, the displacement speed of the assembly (DS) was determined.…”

“…Through the temperatures obtained by type K thermocouples, previously registered at the fuel inlet in the flow meters and outlet, it was possible to determine the density of the diesel oil and later corrected, according to Oiole et al (2019). Mass-based consumption and specific consumption were determined according to the measured quantity ratio (Lopes et al, 2003).…”

Energy Efficiency of Agricultural Tractors Equipped With Continuously Variable and Full Powershift Transmission Systems

“…The turbo pressure (TP), force (DB ), power available (DB ) and efficiency (DB ) on the drawbar, and air intake (I ) and exhaust gas (E ) temperatures, were determined according to Oiole et al (2019). Furthermore, TP was measured using a MPX 5700DP piezoresistive pressure transducer model (Motorola Inc.) to assess the pressure at the tractor engine intake manifold during the tests; and I and E were measured during the test using type-K thermocouples placed at the air filter inlet, and exhaust, respectively.…”

OPERATIONAL AND ENERGY PERFORMANCE OF 250 kW DOUBLE WHEELED VERSUS RUBBER HALF-TRACKED TRACTORS IN THE SOYBEAN SOWING

“…A slippage index higher than 15% can provide intensive soil degradation, interfering with the operating speed and the hourly fuel consumption. These parameters act directly or indirectly in the operational and energy performance of agricultural tractors, affecting the power and efficiency in the drawbar, specific fuel consumption, and engine thermal efficiency, thus lacking experiments to determine the most efficient drive wheel during the field operation (Smerda & Cupera, 2010;Moitzi et al, 2013;Battiato & Diserens, 2017;Janulevičius et al, 2018;Lopes et al, 2019;Oiole et al, 2019).…”