Two-stroke engine for working machine and series hybrid device for working machine incorporating the same

A two-stroke engine for a working machine in a series hybrid device that includes an internal combustion engine, a generator connected to the internal combustion engine, a battery for storing electric power generated by the generator, and one or more motors operating with electric power supplied from the battery and that constitutes a power source for a working machine,

• the two-stroke engine constituting the internal combustion engine incorporated in the series hybrid device,
• the two-stroke engine comprising:
• a throttle motor for driving a throttle valve disposed in an intake system;
• a fuel injection device disposed in the intake system including a crank chamber and injecting fuel into the intake system;
• and
• a control unit controlling the throttle motor and the fuel injection device, wherein
• the two-stroke engine is designed to achieve an engine rotation speed of 4,500 rpm to 7,000 rpm with a state where the throttle valve is fully opened, wherein
• the two-stroke engine is operated with the throttle full open by the control unit, and wherein
• the battery is charged with electric power generated by the generator using the two-stroke engine.