Portal de Periódicos da CAPES

Transmissões que equipam os tratores agrícolas comercializados no Brasil

2021; UNIVERSIDADE FEDERAL DE SANTA MARIA; Volume: 51; Issue: 3 Linguagem: Inglês

1678-4596

Daniela Herzog, José Fernando Schlosser, Rovian Bertinatto, Marcelo Silveira de Farias, Leonardo Casali,

Agricultural Engineering and Mechanization

portuguesEm um trator, o sistema de transmissao tem a funcao de transmitir a potencia gerada no motor para as rodas motrizes, sistemas hidraulicos e tomada de potencia (TDP). Sao diversos os tipos de transmissoes disponiveis no mercado brasileiro, desde as mais simples ate as de ultima geracao. Neste sentido, o objetivo deste trabalho foi verificar os tipos de transmissoes que equipam 228 modelos de tratores agricolas, produzidos e comercializados no Brasil, durante o ano de 2019. Os modelos de tratores foram agrupados em classes de potencia e as transmissoes classificadas em: deslizante; parcialmente sincronizada; sincronizada; Semi Powershift; Full Powershift; e CVT. Como resultado, verificou-se que, na Classe III (51,5 a 73,5 kW) sao ofertados o maior numero de tratores, 66 modelos no total. Mesmo o trator acompanhando as constantes modernizacoes do campo e estando cada vez mais independente do operador, 66% das transmissoes ainda sao mecânicas. Porem, ha o surgimento da transmissao CVT que, mesmo de modo incipiente, disponivel apenas nos tratores com potencia acima de 117,7 kW, tende a equipar tratores menos potentes nas proximas decadas EnglishIn 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