Patent ID: 8766498

Claim:
An electric generator incorporated into a hybrid vehicle including an engine and an electric drive motor and actuated by the engine, comprising: a rotor mounted to one end portion of a crankshaft of the engine such that the rotor is rotatable integrally with the crankshaft, the rotor including a stator; an accommodating member having a cylindrical shape, for accommodating the rotor such that the accommodating member surrounds an outer periphery of the rotor; and a spacer member which is disposed between the engine and the accommodating member to couple a crankcase of the engine to the accommodating member; wherein the accommodating member includes a separating plate defining an accommodating space of the rotor at one end side in a rotational axis direction of the rotor; an air inlet is provided to face a space surrounded by the spacer member and the separating plate; the separating plate is provided with an introduction port of cooling air to directly guide the cooling air introduced from the air inlet to an end portion of the stator of the rotor in the rotational axis direction of the rotor; and a peripheral wall portion of the accommodating member is provided with an air outlet such that the air outlet opens in the vicinity of the outer periphery of the rotor and is tilted in a forward direction of a rotational direction of the rotor and in a radially outward direction.