Drive unit for working vehicle, especially for floor conveyor

The system has a transmission (5), connected to a combustion engine (1), and to a switching transmission (9). The system connects to a collecting transmission for propelling wheels on a floor conveyance. An electrical transmission, from an electronic machine cooperates with transmission. A second electronic machine is connected to the transmission and coupled to the propelled wheels. The transmission between the first electronic machine provides a constant moment relationship. An electrical switching configuration is connected with electronic memory. Two mechanical-hydraulic transducers (3, 7) are coupled with the electrical transmission and controllable for the consumption of hydraulic energy.