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| Farias,Marcelo Silveira de; Schlosser,José Fernando; Estrada,Javier Solis; Martini,Alfran Tellechea; Barbieri,Juan Paulo. |
| Nos últimos anos, a oferta de pulverizadores autopropelidos no mercado brasileiro aumentou, principalmente para suprir a demanda de agricultores que possuem grandes extensões de áreas, nas quais se requer um alto ritmo operacional. Neste trabalho, foram avaliados, em função da potência nominal do motor, os diferentes tipos de transmissões, a capacidade do reservatório de calda, tamanho das barras e vão livre, considerados critérios técnicos importantes para a seleção dessas máquinas. Para tanto, utilizaram-se informações técnicas de 41 modelos de pulverizadores autopropelidos comercializados no mercado brasileiro. Como resultado, classificaram-se os pulverizadores em cinco classes, segundo a potência do motor. Verificou-se que, com o aumento da potência,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pulverizadores hidráulicos; Faixas de potência; Classificação.. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000500939 |
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| Farias,Marcelo Silveira de; Schlosser,José Fernando; Linares,Pilar; Barbieri,Juan Paulo; Negri,Giácomo Müller; Oliveira,Luis Fernando Vargas de; Rüdell,Iury Iago Port. |
| ABSTRACT: The correct choice of modern power transmissions can help farmers decrease production costs. The following research aimed to assess fuel consumption efficiency of an agricultural tractor equipped with continuously variable transmission, at different travel speed and load levels applied on the tractor drawbar. Standard procedure has been applied considering six load levels (30; 40; 50; 60; 70 and 80% of Q0) by means of breaking with a dynamometer car instrumented in a concrete test track, at three travel speeds (5.16; 7.29 and 10.48km h-1). Throughout the experiment, engine speed, traction force and hourly fuel consumption were monitored. The results indicated that there was an average increase of 2.67; 2.82; and 2.61L h-1 in the hourly fuel... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Tractor testing; Load levels; CVT transmission; Specific fuel consumption. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000600351 |
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| Barbieri,Juan Paulo; Schlosser,José Fernando; Farias,Marcelo Silveira de; Negri,Giácomo Müller; Oliveira,Luis Fernando Vargas de. |
| ABSTRACT: This study aimed to develop and validate an ergonomics index for the operator workplace assessment of agricultural tractors sold in the Brazilian market. To develop the ergonomics index, the operator work places were assessed for compliance with current, national and international, safety and ergonomics standards. The following standards were analyzed to develop ergonomics index: ISO 15077 (1996), which regulates the position of operator controls; ABNT NBR ISO 4254-1(2015) and ABNT NBR ISO 4252 (2011), which regulate the access to operator workplaces; and NR 12 (2010), which determines the mandatory items of operator workplaces.Thirty-four operator work places of 152 models of new agricultural tractors sold in the Brazilian market were analyzed... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ergonomics; Safety; Operator controls; Access; Standards. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000100352 |
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