Agco International Gmbh

Valtra Oy Ab

Ville Viitasalo

Raine Kivelä

Timo Ruokola

A tractor transmission including a range gearbox having an input shaft driven from a prime mover through a main clutch, an output shaft, an auxiliary drive shaft driven from the prime mover independently of the input shaft, and a torque fill drive system operative between the auxiliary drive shaft and the range gearbox output shaft including a torque fill clutch operative to transmit torque from the auxiliary drive shaft to the output shaft of the range gearbox when the torque fill clutch is engaged, so that when drive to the input shaft is interrupted to change gear, the torque fill clutch is engaged to transfer drive from the auxiliary drive shaft to the output shaft and maintain momentum of the vehicle. The system may transmit torque to the output shaft through a lay shaft of the range gearbox or through a ground speed PTO drive.

Transmission arrangement and method for agricultural vehicle

A method of operating an agricultural vehicle including a range gearbox, an independent PTO system driven from an auxiliary drive shaft and a ground speed PTO system driven from an output shaft of the range gearbox. The method includes transferring torque from the auxiliary drive shaft to the output shaft of the range gear box via the independent PTO system and the ground speed PTO system while drive to the range gearbox is interrupted during a change in the range gear.

Method of operating an agricultural vehicle and a transmission arrangement for an agricultural vehicle

There is provided transmission module () for a tractor which is selectively configurable between a CVT arrangement and a multi-ratio powershift transmission arrangement. The module comprises an epicyclic unit () in which a first gear element of the epicyclic is driven mechanically from the input shaft () and a second gear element of the epicyclic acts as an output of the transmission module. By simply connecting either a CVT unit () or a pair of clutches () between the input shaft and a third gear element the module () can be converted to the desired transmission arrangement. This delivers benefits in a factory for example whereby a large proportion of the assembly can be completed before tailoring the transmission to a customers requirements, thus reducing lead times on delivery.

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Suolahti, Finland

Ville Viitasalo