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Published– May 2021
Number of Pages– 110
The adoption of new transmissions was one of the disruptive technological advances in agricultural tractors recently. Several changes in the Human Machine Interface of the tractor have been introduced to accommodate the technology. Agricultural machinery is one of the biggest source of the emission of air pollutants in rural locations.
Emissions of a specific tractor engine mainly depend on engine speed which is co-related to the power transmission of the tractor. Working processes in agriculture nowadays cannot be imagined without the use of modern agricultural mechanization, especially primary power units.
One of the major changes has been to the transmission systems available on a modern tractor, and the choice that the potential buyer faces when purchasing a new machine. The latest trend in tractor transmissions has been the move to CVT transmissions. CVTs have been around for some years, and many mopeds, scooters, golf cars and utility vehicles use a simple belt drive CVT transmission.
Tractor transmissions use a hydraulic motor to provide an instant forward and reverse facility, and then a mechanical drivetrain to give the efficiency and power delivery required. The newer CVT systems are yet to become fully established, but they potentially offer a real mix of the best features of the other systems, the variable speed and instant forward and reverse of the Hydrostatic transmission and the mechanical efficiency of the manual transmission.
Most of the OEMs in India prefer manual transmissions , as they can have controllable speeds will be necessary for most of the operations that are performed with a tractor. They provide the farmer with a larger degree of control in certain situations, such as fieldwork. However, when traveling on public roads, the slow operating speeds can cause problems, such as long lines or tailbacks, which can delay or aggravate other road users.
To know more about global tractor market, read our report
The global tractor transmission market is estimated at ~$3 Billion in 2020 and growing at 3% CAGR till 2026.
John Deere unveiled the “world’s first” continuously variable transmission with an electro-mechanical power split, including an implemented interface. The new concept (for 8R Series tractors) was awarded gold medal by the Agritechnica Innovation Commission jury. On the new so-called ‘eAutoPowr’ transmission, John Deere replaced the hydraulic components with an electric power path. Another apparent advantage of eAutoPowr is its increased efficiency, especially in the partial load range. Additional operator benefits include “very precise speed regulation and better acceleration”
New Holland combining the FPT NEF 6-cylinder engine with New Dual Clutch and CVT (continuously variable transmission) technology provides high efficiency and productivity. Included on the tractor is a 24×24 Dynamic Command transmission developed in-house by New Holland. It features 8-step push-button gear changes using Dual Clutch technology as well as three push-button.
Komatsu released its dozer featuring a hydrostatic transmission (HST). The HST ensures the dozer is effective at grading, pushing, side-cutting and working on soft ground, providing operators with the flexibility to move from production to finishing with a single machine.
The AGCO’s group Challenger Accu-V continuously variable transmission (CVT) is engineered to optimize the benefits of track tractors. Accu-VT can achieve ground speed from 65 feet per hour to as much as 25 mph, all at reduced engine speed. The Tractor Management System (TMS) automatically controls engine speed and transmission ratio to ensure constant ground speed.
Case IH with its Puma series tractors, equipped with CVXDrive continuously variable transmission provides intuitive operation and smooth, seamless power transfer through varying conditions without torque interruption. By selecting the target speed, the transmission automatically adjusts to deliver the desired speed to match load conditions. When equipped with CVXDrive, updated Puma models incorporate several drivability enhancements.
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