| 摘要 |
A CVT transmission (10) for motor vehicles, in particular for farm tractors, is disclosed. The transmission comprises a hydraulic unit (11), an epicyclic rotary mechanism (18), a gearbox (53) and a differential gear (DIF). In the CVT transmission (10) it is possible to pre-synchronise a particular speed before actually shifting the running mode of the vehicle. Moreover, the pre-selection logic of a plurality of synchronisers (S1, S2, S3) and the modulated engagement/disengagement of two clutches (A, B) allows to shift from one range to another even in conditions of imperfect rpm synchronisation, considerably simplifying the electronic control of the system.
|
