Abstract: An engine is provided with an output shaft and a motor generator connection shaft of a crankshaft at ends of a crank case and adapted such that the output shaft can be connected with an external driven apparatus. A motor generator has stators relatively fixed to the crank case and a rotor coupled with the motor generator connection shaft and rotating relative to the stators. An external apparatus connection shaft is connected with the rotor and disposed at an end of the motor generator on the opposite side of the engine. A clutch is disposed between the motor generator connection shaft and the rotor. A power storage unit stores electric power generated by the motor generator and supplies the electric power to the motor generator. A controller switches between an electric power generation function and a motor function, and engages and disengages the clutch.

Abstract: An engine is provided with an output shaft and a motor generator connection shaft of a crankshaft at ends of a crank case and adapted such that the output shaft can be connected with an external driven apparatus. A motor generator has stators relatively fixed to the crank case and a rotor coupled with the motor generator connection shaft and rotating relative to the stators. An external apparatus connection shaft is connected with the rotor and disposed at an end of the motor generator on the opposite side of the engine. A clutch is disposed between the motor generator connection shaft and the rotor. A power storage unit stores electric power generated by the motor generator and supplies the electric power to the motor generator. A controller switches between an electric power generation function and a motor function, and engages and disengages the clutch.

Abstract: A combustion chamber of an in-cylinder direct fuel injection spark ignition engine having a pentroof composed of an intake side roof and an exhaust side roof, a piston, and a cylinder. The combustion chamber has a fuel injector provided between the intake side roof and the exhaust side roof inclined toward the exhaust side port, an intake port provided on the intake port side roof at an acute angle with respect to an extended line from the exhaust side roof so as to form a tumble flow of intake air along the exhaust side roof, a piston cavity with a curved surface formed on the top surface of the piston so as to reflect a fuel spray injected from the fuel injector together with that tumble flow in the direction of the intake side roof, and an electrode of a spark plug projected from the intake side roof so as just to collide with the tumble flow.