DRIVE TRAIN FOR OVERHEAD CAM ENGINE

摘要

A drive train for a four stroke, overhead cam engine is provided, comprising a crankshaft, connecting rod, and piston assembly for reciprocating the piston within the cylinder bore of a cylinder block. An internally profiled cam gear is driven around an axis perpendicular to the axis of the cylinder block. A pair of follower arm s extend from a pair of rocker arms and engage the cam profile to actuate intake and exhaust valves in the cylinder block. An intermediate gear is driven by the cranksha ft at half speed to drive the cam gear, and may also be used to drive an additional. device, such as a combination oil pump and governor. The cam follower arms may be dispose d in an overlapping crosswise arrangement generally parallel to the cam gear, or may be disposed perpendicular to the cam gear.