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| Farias,Marcelo Silveira de; Schlosser,José Fernando; Martini,Alfran Tellechea; Santos,Gustavo Oliveira dos; Estrada,Javier Solis. |
| ABSTRACT: This paper aimed to evaluate the performance of a Diesel cycle engine, changing the configurations for the air and fuel supply system. Variables analyzed were torque, power, specific fuel consumption and thermal efficiency in four different engine configurations (aspirated, aspirated + service, turbocharged + service and turbocharged). For that, there were dynamometer experiments by power take-off of an agricultural tractor. The experimental outline used was entirely randomized, in a bifatorial design with three repetitions. Results indicated that the engine supercharge, compared to its original configuration, provided a significant increase of torque and power. Only the addition of turbo does not caused a significant effect in the engine... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agricultural tractor; Turbocharger; Injection pump; Fuel consumption. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000600352 |
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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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| Perin,Gismael Francisco; Schlosser,José Fernando; Farias,Marcelo Silveira de; Estrada,Javier Solis; Treichel,Helen; Galon,Leandro. |
| Resumo: O objetivo deste trabalho foi quantificar o efeito do tipo de diesel e da concentração de biodiesel na mistura combustível sobre as emissões de gases por motor agrícola submetido a diferentes cargas. Foram testados dois tipos de diesel: S10, com baixo teor de enxofre; e S500, com alto teor de enxofre; bem como suas misturas com 5, 10, 15, 20, 50 e 100% de biodiesel. O motor, de quatro cilindros, turboalimentado e com 105 cv de potência máxima, foi submetido a oito modos de operação, sob diferentes rotações e torques. O ensaio seguiu a metodologia prevista na norma NBR ISSO 8174-4:2012, tendo-se analisado as emissões de O2, CO2, NO2, NO, CO e de hidrocarbonetos (HC). Somente as emissões de HC foram influenciadas pelo tipo de diesel utilizado. As... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ciclo diesel; Emissão de CO2; Energia renovável; Freio dinamométrico; Poluentes; Teor de enxofre. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2015001201168 |
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| Estrada,Javier Solis; Schlosser,José Fernando; Farias,Marcelo Silveira de; Martini,Alfran Tellechea; Santos,Gustavo Oliveira dos. |
| ABSTRACT: Currently, manufacturers of agricultural tractors offer to farmers a diversity of brands, models, and settings for the most diverse agricultural operations. In this sense, the relation mass/power of tractor influences directly in the performance of these operations. The objective of this research was to study the agricultural wheel tractors marketed in Brazil in relation to their mass, in order to obtain current data to help their selection and proper use. The research involved 145 agricultural tractors models of eight different brands, including 2WD, MFWD and 4WD versions. The variables mass without ballast, relation mass/power for the different brands, type of traction and tractor power were analyzed separately. Tractor power was classified in:... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sizing machines; Agricultural mechanization; Mass/power ratio.. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000801390 |
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| Estrada,Javier Solis; Schlosser,José Fernando; Farias,Marcelo Silveira de; Rodrigues,Fabrício Azevedo; Martini,Alfran Tellechea; Santos,Gustavo Oliveira dos. |
| ABSTRACT: This research evaluated the performance of a diesel engine in an agricultural tractor, using Diesel S500 (B5) and mixture with 3% (ED3), 6% (ED6), 9% (ED9), 12% (ED12) and 15% (ED15) of hydrous ethanol. Variables evaluated were the power, torque, specific fuel consumption, torque reserve, speed reserve and elasticity index of engine. Results indicated that using B5 and ED3 the values of torque and engine power not differ, in addition, with the ED3 the fuel consumption was lower than 5.92%. Using ED12, power has reduced in 2.97%, compared with B5, while their fuel consumption had no difference. With ED15, the power was lower 6.30% and the fuel consumption increase 3.77%, both compared with B5. Torque reserve value was increased with increasing the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biofuel; Diesel cycle; Agricultural tractor; Brake dynamometer. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000701200 |
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