| 摘要 |
Conventional drive units for motor vehicles, in particular tractors, consist essentially of an internal combustion engine, of at least one downstream gearbox, and of a drive shaft for driving the front and/or rear wheels. In order also to be able to drive a vehicle of this kind in an infinitely variable manner for relatively low travelling speeds, it is proposed, in addition to the conventional drive unit, to provide a hydraulic drive unit which acts on the drive shaft (14) of the motor vehicle. The hydraulic drive unit can be coupled to the drive shaft (14) of the motor vehicle by a gearshift sleeve (62) or multi-plate clutch. An interlock circuit ensures that the hydraulic drive unit is only in engagement with the drive shaft (14) when the conventional drive unit has been decoupled from the power train. …<IMAGE>… |
