Engine with CVT and swelling out lubricant oil chamber

摘要

The present invention refers to an engine (2) having an engine case (22) on one side of which a V-belt type of continuously variable transmission is provided, the CVT being placed in a transmission case (45) and constituted that a V-belt is routed around a drive pulley (55) and a driven pulley (56). The drive pulley (55) is attached to one end of a crankshaft (28), and the driven pulley (56) is attached to one end of a transmission shaft (47) parallel to the crankshaft (28).
Said engine has improved heat management properties in the area of the heat susceptible CVT by means of using a V-belt of resinous material, allowing reduced friction and dimensions of the CVT and a close compact arrangement of the drive and driven pulleys (55, 56) having a small gap (b) therebetween only. Preferably, the V-belt comprises a number of resin blocks (57a), and a kick shaft (110) is placed opposite the CVT.