Transmissões presentes em tratores agrícolas no Brasil

Ribas, Rodrigo Lampert; Schlosser, José Fernando; Frantz, Ulisses Giacomini; Farias, Marcelo Silveira de; Nietiedt, Gustavo Heller

doi:10.1590/s0103-84782010005000162

Cited by 2 publications

(5 citation statements)

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“…Furthermore, tractors are priced based on engine power, which makes it more difficult to dilute the price of a high-end transmission system on a low-power tractor. However, by comparatively analyzing the data obtained herein with that of the study conducted by RiBAS et al (2010), it was observed that the number of models with hydrostatic transmissions has been increasing over the years. Consequently, there was a significant decrease in the number of sliding transmissions in high-power models.…”

Section: Rural Engineeringmentioning

confidence: 77%

“…The gearbox is the main component of the transmission system because it is responsible for most of these changes. According to RiBAS et al (2010), the transmission systems of tractors marketed in Brazil, despite various commercial names, fall into two categories: mechanical and hydrostatic transmissions.…”

Section: Rural Engineeringmentioning

confidence: 99%

“…In contrast, some hydrostatic transmissions are characterized by the presence of several clutch disc packs whose function is to shift gears by directing pressurized hydraulic fluid (RiBAS et al, 2010). This system is commonly called as load exchange because it enables gear shifts without engaging the clutch.…”

Section: Rural Engineeringmentioning

confidence: 99%

“…Thus, there is a predominance of hydrostatic transmission systems in tractors with engine power above 183.9 kW. Comparatively, 10 years ago, hydrostatic transmissions were equipped on all tractors with engine power of 148 kW and above (RiBAS et al, 2010).…”

Section: Rural Engineeringmentioning

confidence: 99%

“…Additionally, RiBAS et al (2010) stated that even after a decade, there is no standardization of terminology in this field, which causes a confusion of technical and commercial terms. Therefore, the verification of the correct classification by agricultural machinery certifying laboratories remains the greatest challenge in the Brazilian agricultural tractor market.…”

Section: Rural Engineeringmentioning

confidence: 99%

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Transmission systems in agricultural tractors marketed in Brazil

et al. 2021

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In a tractor, the transmission system transmits the power generated in the engine to the driving wheels, hydraulic systems, and power take-off (PTO). There are several types of transmission systems available in the Brazilian market ranging from the simplest to the most advanced. Therefore, the objective of this study was to verify the different types of transmission systems present in 228 models of agricultural tractors produced and marketed in Brazil during 2019. The tractor models were grouped based on the engine power and the transmission systems were classified as sliding, partially synchronized, synchronized, semi powershift, full powershift, and continuously variable transmission (CVT). According to this classification, it was found that most tractors belonged to Class III (51.5-73.5 kW) with 66 models in total. However, even with continuous modernization in this field and with tractors becoming increasingly independent from the operator, 66% of transmission systems are still mechanical. However, CVT systems, which are available only in tractors with an engine power above 117.7 kW, are expected to be equipped on less powerful tractors in the coming decades.

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Section: Rural Engineeringmentioning

confidence: 77%

Section: Rural Engineeringmentioning

confidence: 99%

Section: Rural Engineeringmentioning

confidence: 99%

Section: Rural Engineeringmentioning

confidence: 99%

Section: Rural Engineeringmentioning

confidence: 99%

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Transmission systems in agricultural tractors marketed in Brazil

et al. 2021

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Critérios técnicos para a seleção de pulverizadores autopropelidos comercializados no mercado brasileiro

et al. 2015

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RESUMO 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 quaisOs pulverizadores são utilizados para aplicar agrotóxicos e fazer com que estes produtos atinjam o alvo desejado. No mercado brasileiro, existem diversos tipos, desde os mais simples, do tipo costal, utilizados para atender pequenas áreas, até os pulverizadores autopropelidos, os quais possuem alta tecnologia e elevada capacidade operacional, capazes de atender grandes áreas com qualidade na pulverização (CASALI et al., 2011).A escolha da máquina e sua correta utilização são fatores fundamentais para se obter qualidade na aplicação e eficiência dos agrotóxicos. Para se obter qualidade nas aplicações, deve-se possuir o maior conhecimento sobre quatro fatores: máquina agrícola, alvo biológico, fatores climáticos e agrotóxicos (SCHLOSSER, 2002).O motor e a transmissão tornam os pulverizadores autopropelidos autônomos na sua operação. Para o deslocamento da máquina e o acionamento de mecanismos internos do circuito hidráulico, utiliza-se a potência do motor, declarada pelos fabricantes e conhecida como potência nominal, conforme a norma ABNT NBR ISO 3046/1 (1995).Muitos fatores associados com os pulverizadores tratorizados determinam a eficiência operacional do trabalho, destacando-se: velocidade, tamanho da barra, tempo de manobra, capacidade do reservatório de calda, tempo de reabastecimento e distância percorrida (MATUO, 1990). Além desses, perfeitamente aplicáveis aos pulverizadores autopropelidos, o sistema -NOTA -I Programa de Pós-graduação em Engenharia Agrícola

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Transmissões presentes em tratores agrícolas no Brasil

Abstract: RESUMO O sistema de transmissão de um trator agrícola tem por principal finalidade transmitir a potência gerada no motor ao sistema hidráulico, à tomada de potência e às rodas

Cited by 2 publications

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Transmission systems in agricultural tractors marketed in Brazil

Transmission systems in agricultural tractors marketed in Brazil

Critérios técnicos para a seleção de pulverizadores autopropelidos comercializados no mercado brasileiro

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