Driving system for a an industrial truck with a combustion engine, a
two-branch gear transmission whose first shaft is coupled to the
combustion engine, whose second shaft is coupled to a change-over
transmission, whose outlet acts on the driven wheels of the industrial
truck via a collecting transmission, an electric transmission of which a
first electric machine cooperates therewith, with respect to the torque,
using the two-branch gear transmission, and a second electric machine is
coupled via at least one collecting transmission to the driven wheels,
the two-branch gear transmission producing a constant torque ratio
between the first electric machine and at least the first and second
shaft and an electrical circuit arrangement electrically coupling the
electric machines and being connected to an electric accumulator, two
mechanical hydraulic converters of which one is coupled to the first or
second shaft of the two-branch gear transmission and the second to the
electric transmission, and devices for the absorption of hydraulic energy
which are associated with each mechanical hydraulic converter.