Patent ID: 8676452

Claim:
A hybrid-type working machine comprising: an internal combustion engine motor; a supercharger that supplies the internal combustion engine motor with compressed air; an electric generator that is connected to the internal combustion engine motor to perform electricity generation by the driving force of the internal combustion engine motor, and assists the driving force of the internal combustion engine motor through its own driving force; an inverter circuit that is connected to an electric terminal of the electric generator; and a control portion that drives the inverter circuit and includes a memory portion, which stores first information indicating a correlation between the revolutions of the internal combustion engine motor, the supercharging pressure of the supercharger and an output upper limit value of the internal combustion engine motor, wherein the control portion controls the inverter circuit so that the electric generator assists the driving force of the internal combustion engine motor when the required output exceeds the output upper limit value, based on first information stored in the memory portion, and the control portion controls the inverter circuit based on at least three different signals which comprise a signal that indicates the revolutions of the internal combustion engine motor, a signal that indicates the supercharging pressure of the supercharger, and a signal that indicates the output upper limit value of the internal combustion engine motor.