Patent ID: 7063063
Filing Date: 2006-06-20
Classification: F01M,F01P,F16H

Abstract:
1. A four-stroke-cycle engine comprising: a crank case, which is dividable into a plurality of crank case components having mating surfaces, said crank case components being assembled into the crank case by contacting the mating surfaces to each other; a crank shaft rotatably supported in the crank case at a portion between the mating surfaces of the crank case components; and a belt driven-type continuously variable transmission mechanism operatively connected to one end of the crank shaft through a clutch belt, said continuously variable transmission mechanism including a drive shaft, said clutch belt being stretched around the drive shaft and the crank shaft so that a tension direction of the clutch belt has an inclination by a predetermined angle with respect to a line passing the mating surfaces of the crank case components.