Patent ID: 8056669
Filing Date: 2011-11-15
Classification: F16D

Abstract:
1. A motorcycle power unit comprising: a crankcase forming a portion of an engine body mounted on a vehicle body frame; a clutch device arranged in a power transmission path between the crankshaft and a drive wheel so as to engage or disengage the transmission of rotational power of the crankshaft which is rotatably supported on the crankcase toward the drive wheel; a clutch cover joined to either one of left and right side surfaces of the crankcase in a state wherein the crankcase is mounted on the vehicle body frame so as to form a clutch chamber for housing the clutch device between the clutch cover and the crankcase; and a clutch control device for performing a changeover of engagement and disengagement of the clutch device; wherein the clutch control device performs the changeover of engagement and disengagement of the clutch device by controlling an oil pressure applied to the clutch device and oil passages for connecting the clutch control device and the clutch device with each other are mounted on the clutch cover; wherein the clutch device includes a twin type which includes first and second clutches, and a pair of individual control means which constitutes the clutch control device for individually controlling engagement and disengagement of the first and second clutches, and wherein the clutch control device is attached to the outer side surface of the clutch cover while the two individual control means are disposed at different positions from each other both in the front-and-rear direction and in the up-and-down direction so that the two individual control means easily come in contact with a flow of air.