Crankcase venting for internal combustion engine

摘要

The crankcase of the internal combustion engine is efficiently vented by a venting duct (7) radially through one web (5) of the crankshaft and connecting with an axial duct (8) through the crankshaft and out of one end of the engine. Any oil particles are thrown out of the radial duct back into the crankcase through the centrifugal force of the rotating crankshaft. The axial venting duct can connect to a short radial duct (11) outside the engine housing. This connects with a circular collecting duct around the crankshaft stub.