Hybrid system of engine and motor generator

A hybrid system of an engine and a motor generator, the system comprising:

• an engine provided with an output shaft of a crankshaft at one end of a crank case and a motor generator connection shaft of the crankshaft at the other end of the crank case, and adapted such that the output shaft can be connected with an external driven apparatus;
• a motor generator having a stator relatively fixed to the crank case and a rotor coupled with the motor generator connection shaft and rotating relative to the stator;
• an external apparatus connection shaft connected with the rotor, and disposed at an end of the motor generator on a side opposite to a side of the engine, and adapted so as to be connectable with the external driven apparatus or an external driving apparatus;
• a clutch disposed between the motor generator connection shaft of the engine and the rotor;
• a power storage unit to store electric power generated by the motor generator and supply the stored electric power to the motor generator;
• and
• a controller to switch between an electric power generation mode in which the motor generator is operated as a generator and a motor mode in which the motor generator is operated as a motor, and switch between engagement and disengagement of the clutch,
• wherein the controller executes a driven electric power generation mode in which the clutch is disengaged and the motor generator is operated as the generator to generate electric power with an input from the driving apparatus connected with the external apparatus connection shaft.