Abstract: The invention relates to a battery cooling structure for cooling a battery mounted in a vehicle. This battery cooling structure includes a battery pack (20) within which the battery is housed in an internal space; an air supplying device (26) that is configured to send cooling air to the battery pack (20); and an air exhausting device (30) is configured to discharge exhaust air from the battery pack (20). The battery pack (20) is arranged under a rear seat (10) of the vehicle. An exhaust vent (54) of the air exhausting device 30) is provided on a floor surface in a rearward space behind the rear seat (10) in the vehicle, and discharges the exhaust air from the battery pack (20) upward into the rearward space from the exhaust vent (54) provided in the floor surface.

Abstract: The invention relates to a battery cooling structure for cooling a battery mounted in a vehicle. This battery cooling structure includes a battery pack, a blower, and an intake air duct. The battery pack houses the battery in an internal space. The blower is configured to deliver cooling air into the battery pack. The intake air duct is connected to an intake side of the blower. Also, an inlet (62) of the intake air duct (60) is provided only on a side surface on a door side of a lower trim (12) positioned on an outer edge of a space below a seat cushion (10a).

Abstract: The invention relates to a battery cooling structure for cooling a battery mounted in a vehicle. This battery cooling structure includes a battery pack (20) within which the battery is housed in an internal space; an air supplying device (26) that is configured to send cooling air to the battery pack (20); and an air exhausting device (30) is configured to discharge exhaust air from the battery pack (20). The battery pack (20) is arranged under a rear seat (10) of the vehicle. An exhaust vent (54) of the air exhausting device 30) is provided on a floor surface in a rearward space behind the rear seat (10) in the vehicle, and discharges the exhaust air from the battery pack (20) upward into the rearward space from the exhaust vent (54) provided in the floor surface.

Abstract: A forced-air-cooled engine has a main blow-out opening provided to a back plate of a cooling fan cover at a position facing a cylinder part for blowing out cooling air for cooling a cylinder part and a secondary blow-out opening provided to the back plate at a position opposite to the main blow-out opening in regard to the crankshaft center for cooling a part of a crankcase part, wherein a cooling air guide cover is equipped which is composed of a cylinder air-guide cover part which guides air blown out from the main blow-out opening to flow to cool the cylinder part and cylinder head, and a top cover part which guides air blown out from the secondary blow-out opening to flow along a side face of the crankcase part to cool there and then flow into midstream of the cooling air flow blown out from the main blow-out opening and cooling the cylinder part and cylinder head.

Abstract: A structure of crankcase-integrated cylinder block for a small internal combustion engine is posed to increase strength and rigidity in order to reduce particularly vibration and noise. A cylinder part and a crankcase part are formed into a box-like shape being cast in one piece, a crankcase cover is fixed to the crankcase part to cover an opening on a side in anteroposterior thereof, a crankshaft bearing boss has a crankshaft bearing hole being provided at a central part of a back wall of the crankcase part to protrude to both inner and outer sides of the back wall for supporting an end sides of a crankshaft, wherein an inner peripheral rib is formed along the corner where the back wall of said crankcase part connects to a peripheral wall extending from the periphery of the back wall to heave inward form the corner part.

Abstract: The invention provides a method and construction of vibration control supporting a cooling fan cover.

Abstract: A structure of crankcase-integrated cylinder block for a small internal combustion engine is posed to increase strength and rigidity in order to reduce particularly vibration and noise. A cylinder part and a crankcase part are formed into a box-like shape being cast in one piece, a crankcase cover is fixed to the crankcase part to cover an opening on a side in anteroposterior thereof, a crankshaft bearing boss has a crankshaft bearing hole being provided at a central part of a back wall of the crankcase part to protrude to both inner and outer sides of the back wall for supporting an end sides of a crankshaft, wherein an inner peripheral rib is formed along the corner where said back wall of said crankcase part connects to a peripheral wall extending from the periphery of said back wall to heave inward form said corner part.

Abstract: The invention provides a method and construction of vibration control supporting a cooling fan cover.

Abstract: A forced-air-cooled engine having a main blow-out opening provided to a back plate of a cooling fan cover at a position facing a cylinder part for blowing out cooling air for cooling a cylinder part and a secondary blow-out opening provided to the back plate at a position opposite to the main blow-out opening in regard to the crankshaft center for cooling a part of a crankcase part, wherein a cooling air guide cover is equipped which is composed of a cylinder air-guide cover part which guides air blown out from the main blow-out opening to flow to cool the cylinder part and cylinder head, and a top cover part which guides air blown out from the secondary blow-out opening to flow along a side face of the crankcase part to cool there and then flow into midstream of the cooling air flow blown out from the main blow-out opening and cooling the cylinder part and cylinder head.