摘要:
Disclosed is a radiator cooling structure for cooling a radiator 67 of a water-cooled power unit mounted on a small vehicle and disposed on a laterally outer side of the small vehicle, which radiator cooling structure improves the efficiency of cooling an internal combustion engine 16 by using a head wind. The radiator 67 is provided with a radiator cover 68 having a louver 69 for guiding cooling air to the radiator 67. The louver 69 is formed such that a rear part thereof is more protruded laterally outward than a front part thereof. The louver 69 of the radiator cover 68 has parallel slats 69a tilting forward, and a lower body cover 13A is provided with a cooling air intake opening 70 capable of guiding a head wind toward the louver 69 positioned obliquely above and rearward of the cooling air intake opening 70.
摘要:
Disclosed is a cooling air intake structure for a V-belt drive continuously variable transmission 18, which is disposed beside the rear wheel of a small vehicle and which does not permit muddy water and dust to enter therein. A cooling air inlet 71 through which cooling air is taken in is formed at a position beside a transmission case 37 and above a cooling fan side opening 52 formed in the transmission case 37 opposite to a drive pulley 40. A cooling air passage 70 extending from the cooling air inlet 71 to the side opening 52 is formed so as to surround the side opening 52. Cooling air taken in through the cooling air inlet 71 is guided so as to flow upward first and then flows downward along a U-shaped cooling air passage 74 to the side opening 52 of the transmission case 37 beside the cooling fan.
摘要:
[Object] To provide a breather chamber structure for an internal combustion engine wherein the breather chamber can be disposed compactly and the degree of freedom in layout of parts of the internal combustion engine can be raised. [Solving Means] A breather chamber structure for an internal combustion engine (3) includes a crankcase (30), a cylinder body (32) provided upward on the crankcase, and a breather chamber (7) configured to separate oil from oil mist in the crankcase. The breather chamber (7) includes a crankcase side breather chamber (71) provided in the crankcase and open to a joining plane (42) between the crankcase and the cylinder body, and a cylinder side breather chamber (72) provided in the cylinder body and open to the joining plane.
摘要:
To enable attachment/detachment work of a knock sensor to be facilitated and an intake system to be disposed at a low position in a unit swing engine in which: an intake pipe that stands upward from a cylinder head of an engine main unit, swingably supported by a frame body with a cylinder axis tilting forward, and extends rearward above the cylinder head and a cylinder block is connected to an upper wall of the cylinder head; and a knock sensor is fastened, with a screw member, to a mounting boss formed on an upper wall of the cylinder block. A mounting boss 51 is formed on an upper wall 26a of a cylinder block 26 at such a position as to avoid overlapping with an intake pipe 35 as seen in a direction along a screw axis SC of a screw member 53.
摘要:
Disclosed is a radiator cooling structure for cooling a radiator 67 of a water-cooled power unit mounted on a small vehicle and disposed on a laterally outer side of the small vehicle, which radiator cooling structure improves the efficiency of cooling an internal combustion engine 16 by using a head wind. The radiator 67 is provided with a radiator cover 68 having a louver 69 for guiding cooling air to the radiator 67. The louver 69 is formed such that a rear part thereof is more protruded laterally outward than a front part thereof. The louver 69 of the radiator cover 68 has parallel slats 69a tilting forward, and a lower body cover 13A is provided with a cooling air intake opening 70 capable of guiding a head wind toward the louver 69 positioned obliquely above and rearward of the cooling air intake opening 70.