DRIVE UNIT FOR A VEHICLE WITH A CONTINUOUSLY VARIABLE TRANSMISSION

摘要

The drive unit comprises one or several motors (103, 104) driving at least one pair of continuously variable transmission devices (101, 102) each of which driving a drive wheel or a driving axle of a vehicle. Each transmission device comprises a planetary gear system (3) whereby the reactive element, preferably an internal gear ring, is connected to the rotor of a pump, whereby a hydraulic circuit passes through said pump and is provided with at least one adjustable valve (63) for regulating the speed and/or the torque of the output shaft (27), especially in order to facilitate the attainment of a normal operating speed for the engine when started. The hydraulic circuits of the two drive units are interconnected by means of hydraulic lines (105, 107), whereby a differential effect is created between two wheels in question. One of the hydraulic lines can comprise an adjustable valve (109) which is used to limit or inhibit said differential effect.