Crankcase Ventilation System Geometry Optimization

摘要

An internal combustion engine having an oil drain opening connected to an oil drain passage in a cylinder head for simultaneously providing flow of oil to a crankcase and blow-by gases to a crankcase ventilation whereby the geometry of the oil drain opening and oil drain passage are such that the velocity of blow-by gas flow through the oil drain opening is limited.

主权项

1. An internal combustion engine comprising:
a cylinder block having at least one cylinder therein for housing a reciprocating piston; a crankshaft operably connected to the piston, the crankshaft being located in a crankcase, the crankcase further including an oil sump; a cylinder head attached to the cylinder block and having at least a portion of a crankcase ventilation system attached thereto, the cylinder head having an oil drain opening therein, the oil drain opening connected to an oil drain passage for providing the return of oil to the oil sump and the escape of gases into the crankcase ventilation system; wherein the oil drain opening comprises at least one anterior edge and one lateral edge, the anterior edge having a generally rounded profile.