Drive system for an industrial truck and a method for the operation of the drive system

   
   

A drive system for an industrial truck, comprising an internal combustion engine, a three-shaft epicyclic gearing adapted to be connected to the shaft of the internal combustion engine, a first electric motor which is mechanically coupled to the second shaft of the epicyclic gearing and is connected to an onboard network of the industrial truck, a change-speed gearing coupled to the third shaft of the epicyclic gearing, a summing gearbox coupled to the change-speed gearing the other input shaft of which is connected to a second electric motor which is electrically connected to the onboard network and the output shaft of which is coupled to at least one driven wheel of the industrial truck, a clutch (A) between the first and second shafts of the epicyclic gearing, at least one consumption unit for an additional function of the industrial truck that is coupled to one of the shafts of the epicyclic gearing, a sensor device which measures the speeds of the internal combustion engine, the first and second electric motors, and the driving wheel and generates respective signals, and a control and regulation device which controls or regulates the speeds of the electric motors and internal combustion engine, and controls the motor or generator operation of the electric motors and the actuation of the clutch (A) and change-speed gearing in response to set-point signals from the set-point transmitters actuated by the operator of the industrial truck and on the basis of the output signals of the sensor device.

 
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