Abstract
The efficiency of agricultural tractor transmission has been improved over the years, with new concepts such as Continuously Variable Transmission (CVT) and Full Powershift (FPS) evolving in advanced technologies. Both options seek to offer the farmer greater operational results with lower energy expenditure, necessitating studies to assess the effectiveness of these technologies and define the best choice for each purpose. The objective of this work was to evaluate the energy efficiency of two tractors equipped with CVT and FPS transmissions. For this, a strip experiment was conducted in a randomized block design, that analyzed, in addition to CVT and FPS transmissions, target velocities of 4, 6, 8 and 10 km h-1. Operational energy performance parameters were evaluated, such as slippage index, engine rotation, operational velocity, fuel consumption, power available and efficiency on the drawbar, turbo pressure and temperatures of air intake and exhaust gas. Based on the results obtained, the tractor with FPS transmission was more energy efficient in most of the analyzed parameters, requiring 16.31% less in hourly fuel consumption, and providing 16.29% more in the traction bar yield, however, with lower operational velocity compared to the tractor with CVT transmission.
Highlights
In essence, agricultural tractors are designed to efficiently convert energy from fossil fuels into traction force, while towing and mounting implements in the most varied environments (Xia et al, 2020)
Different types of transmission are offered in the global agricultural machinery market, especially tractor models with Continuously Variable Transmissions (CVT) and automated Full Powershift (FPS), which, according to Mattetti et al (2019), stand out in terms of efficiency factors
CVT transmission works through pumps and hydraulic components driven by the motor energy, in which gears combine hydraulic and mechanical force, allowing the infinitely variable activation of ratio ranges, resulting in high operational capacity and transmission efficiency (Rotella & Cammalleri, 2018)
Summary
Agricultural tractors are designed to efficiently convert energy from fossil fuels into traction force, while towing and mounting implements in the most varied environments (Xia et al, 2020). Different types of transmission are offered in the global agricultural machinery market, especially tractor models with Continuously Variable Transmissions (CVT) and automated Full Powershift (FPS), which, according to Mattetti et al (2019), stand out in terms of efficiency factors. CVT transmission works through pumps and hydraulic components driven by the motor energy, in which gears combine hydraulic and mechanical force, allowing the infinitely variable activation of ratio ranges, resulting in high operational capacity and transmission efficiency (Rotella & Cammalleri, 2018). A knowledge of transmission efficiency allows to estimate the losses of energy supplied through combustion during the execution of agricultural operations (Bietresato et al, 2012; Damanauskas & Janulevičius, 2015)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
