Abstract: A charging control device includes: a contact-type automatic charger arranged under a floor and having an opening that opens to an outer surface of a vehicle body; a protective cover that opens and closes the opening; a cooling water circuit that cools at least one of an internal combustion engine prime mover or an electric unit; and a heating unit that is provided on a high water temperature path of the cooling water circuit and heats the contact-type automatic charger.

Abstract: A bearing structure of a crankshaft is disclosed. The crankshaft is rotatably held by a lower cylinder block portion and a bearing cap arranged below the lower cylinder block portion. Stress relaxation grooves extending along the axis of the crankshaft are formed in upper portions of opposite sides of the bearing cap. The stress relaxation grooves have openings in opposite side surfaces of the bearing cap. By forming the stress relaxation grooves, projecting ends extending along the axis of the crankshaft are formed in the upper portions at the opposite sides of the bearing cap. The projecting ends are flexible in response to load acting on the bearing cap when the crankshaft rotates.