Crankcase oil separation device for internal combustion engine

A coalescing filter comprising:

• a filter media having a cylindrical shape configured for insertion into an inner cavity of a housing;
• a central core defining a central cavity with a cylindrical shape, the central core positioned within the filter media;
• a first end cap;
• and
• a second end cap opposing the first end cap, wherein the second end cap has an aperture that forms an inlet port to the central cavity, wherein the aperture has a non-circular shape and is configured to receive a correspondingly shaped projecting feature of the inner cavity of the housing that receives the coalescing filter.

A device for filtering oil mist from blow-by gas, comprising:

• a housing forming an inner cavity, an outlet manifold and an inlet manifold, wherein the housing includes a removable and attachable cover for partially enclosing the outlet manifold;
• and
• a coalescing filter insertable and removable from the inner cavity, the coalescing filter comprising:
• a filter media;
• a central core defining a central cavity, the central core positioned within the filter media;
• a first end cap;
• a coupling assembly positioned within the outlet manifold, attached to and extending outward from the first end cap, wherein the coupling assembly receives a projection of the cover and is configured to position the coalescing filter within the housing, wherein the coupling assembly includes:
• a grommet with a thru hole;
• and
• a plurality of arms coupled to the grommet and the first end cap;
• wherein the grommet with the thru hole receives a projection of the cover;
• wherein engagement between the grommet and projection constrain a radial movement of the coalescing filter relative to a centerline axis of the housing during operation;
• and wherein the projection of the cover forms a receptacle to receive a spring and plunger, wherein the plunger is configured to engage the first end cap of the filter, and wherein the spring and plunger constrain an axial movement of the filter within the inner cavity of the housing;
• and
• a second end cap opposing the first end cap.