Patent ID: 7243564

Claim:
A power transmission system of an engine for transmitting engine power to a driving wheel, said power transmission system comprising: a crankshaft driven by the engine, said crankshaft being arranged in a vehicle body in a widthwise direction of the vehicle body; a sub-shaft which is arranged parallel to said crankshaft and non-concentric with the crankshaft and to which the rotation of said crankshaft is transmitted via a rotary transmission member; and a belt type continuously variable transmission including a primary shaft and a secondary shaft, said primary shaft being arranged concentrically with said sub-shaft and provided with a primary pulley having a variable groove width; said secondary shaft provided with a secondary pulley coupled to said primary pulley via a belt and having a variable groove width, wherein the rotation of said crankshaft is transmitted to said primary shaft via said sub-shaft, and said crankshaft is arranged parallel to said primary shaft, and a clutch member is arranged between said sub-shaft and said primary shaft and, relative to a lineal frame of reference extending in common with a rotation axis of said sub-shaft, said clutch member is disposed along said sub-shaft between said primary pulley and a drive engagement location of said rotary transmission member with said sub-shaft.