Patent ID: 6267700
Filing Date: 2001-07-31
Classification: B62K,F01P,F02B,F16H

Abstract:
A cooling system for a vehicle power unit incorporating:a V-belt transmission in which a drive pulley fixed on a crankshaft of an engine and a driven pulley fixed to a driven shaft linked with a wheel axle are arranged one behind the other and an endless V-belt is wound between the pulleys and the crankshaft, in a housing thereof, the V-belt having an outgoing path along which the V-belt moves from a front section of the housing to a rear section of the housing and a return path along which the V-belt moves from the rear section to the front section, the cooling system comprising:a cooling fan rotated by the rotational force from the crankshaft and disposed in the housing so as to cool an internal space of the housing by introducing air into the housing and discharging the introduced air through a first outlet port formed in the housing to a location outside of the housing; anda second outlet port formed in an upper surface of the housing opposing an approximate middle portion of the return path of the V-belt,wherein the current of air created by the cooling fi is flowed along the outgoing path of the V-belt and then the air reaching an end of the outgoing path of the V-belt is flowed along the return path of the V-belt so as to discharge the air through the second outlet port.