2-cycle engine with direct lubricating structure.

摘要

The invention relates to a 2-cycle engine with a direct lubricating structure providing a ring shaped oil receiving projection (9c) on a side wall of a crank web (9a) of the crankshaft, axially lapping with a portion (33a) of the crankshaft journal bearing (28) leaving a small radial clearance in between whereas a crankpin (10) has an oil through passage (35) the one end of which opens just inside said oil receiving projection (9c) while the other end opens on the outer periphery of the crankpin (10).