Patent ID: 7823667

Claim:
A power unit for a small vehicle, said power unit being composed of an internal combustion engine with a crankshaft, and of a power transmission system equipped with a continuously variable transmission and configured to transmit torque from the crankshaft to the drive-wheel side while reducing the speed of the torque, the power unit comprising: a first oil pump for ejecting lubricant oil; and a second oil pump for ejecting oil for at least one of control of the speed change in the continuously variable transmission and lubrication of the continuously variable transmission, wherein the first and the second oil pumps share a common pump shaft, and the first and the second oil pumps are arranged adjacent to each other in the axial direction, and wherein the continuously variable transmission includes a drive shaft which has an axis parallel to the crankshaft and which is disposed below the crankshaft, the pump shaft with an axis parallel to the crankshaft and the drive shaft is disposed between the crankshaft and the drive shaft in the vertical direction, and the axis of the crankshaft, the axis of the drive shaft, and the axis of the pump shaft are arranged so as to be positioned respectively at the three apexes of an imaginary triangle in a projection drawing on a plane that is orthogonal to the axes of the crankshaft, the drive shaft and pump shaft.