Working machine

A working machine comprising:

• a driving section including an engine, an electric power generator driven by said engine, a battery chargeable by said electric power generator, and an electric motor drivable by both of said electric power generator and said battery;
• a working section driven by said engine to perform desired work;
• a transporting section driven by said electric motor;
• and
• a control section for controlling rotation of said electric motor, on the basis of a comparison between an actual transporting speed and a target transporting speed of said transporting section and,
• said control section performing the operations of:
• determining necessary acceleration of said transporting section in accordance with the actual transporting speed of said transporting section;
• determining a correction coefficient corresponding to a current number of rotations of said engine, from among correction coefficients having a characteristic of becoming closer to a value of one as the number of rotations of said engine increases but becoming closer to zero as the number of rotations of said engine decreases;
• multiplying the necessary acceleration by the determined correction coefficient, to thereby provide corrected necessary acceleration;
• and
• controlling the rotation of said electric motor in accordance with the corrected necessary acceleration.