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| Neto,Lauro S.; Kmiecik,Leonardo L.; Jasper,Samir P.; Zimmermann,Gabriel G.; Savi,Daniel. |
| ABSTRACT The hydraulic remote control system allows the transfer of energy from the engine through a flow of hydraulic oil to engines and implements pulled by agricultural tractors, which can interfere with its energy and operational performance. This study aimed to evaluate the interference of the number of remote control valves in use on the operational and energy performance of an agricultural tractor, using a productivity management system. The experiment was conducted in a strip-plot design, with five replications and three treatments, which consisted of the number of remote control valves in use (1, 2, or 3), totaling 15 experimental units. The results were subjected to normality and homogeneity tests and analysis of variance, followed by the Tukey... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Power on the drawbar; Hydraulic system; Operational speed; Specific consumption; Engine thermal efficiency. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000300356 |
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| Savi,Daniel; Kmiecik,Leonardo L.; Strapasson Neto,Lauro; Silva,Thiago X. da; Jasper,Samir P.. |
| ABSTRACT Studies on the longitudinal distribution of seeds in the sowing row seek to improve crop homogeneity, thus generating high productivity. In this context, seed tubes must be analyzed for their angular curvature. Thus, this study aimed to evaluate the influence of the seed tube curvature on the longitudinal distribution of corn and soybean seeds at different speeds. Two experiments were conducted completely randomized in a double factorial design. The first factor consisted of the seed tube curvature (straight and curved) and the second factor consisted of sowing speeds (1.11, 1.39, and 1.67 m s−1 for corn and 1.39, 1.67, 1.94, and 2.22 m s−1 for soybean), with five replications. The parameters analyzed to measure the longitudinal distribution were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sowing uniformity; Productivity; Seed drill; Performance monitoring; Bench experiment. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000600732 |
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| Oiole,Yasser A.; Kmiecik,Leonardo L.; Parize,Guilherme L.; Silva,Thiago X. da; Jasper,Samir P.. |
| 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... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fuel consumption; Operating yield; Controlled trafic. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000600769 |
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