Patent ID: 11918948
Assignee: CUMMINS FILTRATION IP, INC.
Field: Chemical engineering (Chemistry)
Classification: CPC B  F | IPC B  F

Claim 0:
1. A crankcase ventilation system, comprising:
a housing;
an inlet configured to receive blowby gases from an internal combustion engine and to provide the blowby gases to the housing;
an outlet configured to provide filtered blowby gases from the housing and to at least one of an intake of the internal combustion engine and a surrounding ambient;
a rotating coalescer positioned within the housing such that a gap exists between the rotating coalescer and the housing, D0 is an inside diameter of a rotating portion of the rotating coalescer, the rotating portion representing an outer diameter of the gap, the rotating coalescer including:
a first endcap,
a filter media, wherein the gap permits gas flow between a clean side of the filter media and a dirty side of the filter media, and
a frame surrounding an outside surface of the filter media, the frame comprising a plurality of vanes disposed radially outward of the filter media; and

a central shaft coupled to the rotating coalescer, the central shaft rotatable such that when the central shaft rotates, the rotating coalescer rotates and creates a pumping pressure that causes a high pressure within the housing on the clean side of the filter media and a low pressure on the dirty side of the filter media and at an inlet in the gap at the inside diameter D0, thereby causing a positive recirculation of the blowby gases in which a portion of already filtered blowby gas from the clean side of the filter media returns through the gap to the dirty side of the filter media.