Patent ID: 6202620
Filing Date: 2001-03-20
Classification: F01M,F16C

Abstract:
A lubricating structure for an internal combustion engine, comprising:a crankshaft having a plurality of crank journals and a plurality of crank pins each disposed between the adjoining crank journals;a plurality of oil holes formed in the crankshaft, for supplying lubricating oil to both of a journal bearing part provided in the internal combustion engine for bearing each of the crank journals and a connecting-rod bearing part provided in the internal combustion engine for bearing each of the crank pins;wherein the oil holes formed in the crank journals include a cross oil hole which extend entirely through the crank journals and has openings at both ends thereof, in view of the axial direction of the crankshaft, at least one opening of the cross oil hole, which opens onto the outer peripheral face of each of the crank journals, substantially lies on a straight line for connecting respective centers of the adjoining crank pin and crank journal with each other.