Patent ID: 6176214
Filing Date: 2001-01-23
Classification: F01M

Abstract:
A lubricating structure for an internal combustion engine, comprising:a first oil hole formed in a main journal to communicate with a main gallery provided in a cylinder block;a crankshaft having a second oil hole formed so as to communicate with the first oil hole of the main journal;at least one crank pin formed on the crankshaft to rotate about a center of the crankshaft, the crank pin having a third oil hole formed for continuous communication with the second oil hole of the crank shaft;a connecting-rod rotatably fitted on the crank pin and also provided, at a base part thereof, with a splash oil hole which is constructed so as to communicate with the third oil hole of the crank pin and which has an end opening at an inner face of a circular inner face of a bore for bearing the crank pin and the other end opening at the base part of the connecting-rod as an ejecting port for lubricating oil,wherein, when the splash oil hole is directed toward an inner peripheral face of a cylinder liner, the position of the first oil hole coincides with the position of the second oil hole, and the position of the splash oil hole coincides with the position of the third oil hole so as to form an oil passage for directly guiding oil from the main gallery to the splash oil hole.