Engine air intake filter and crankcase breather oil collection a

Details Engine air intake filter and crankcase breather oil collection a Engine air intake filter and crankcase breather oil collection a

1995-01-25

1995-12-05

Okonsky, David A.

Internal-combustion engines

Charge forming device

Crankcase vapor used with combustible mixture

55DIG19, F02B 7700

Patent

active

054719666

ABSTRACT:
A combination intake air filter for an internal combustion engine and oil collection system for oil in crankcase breather fumes. An enclosed canister having a tubular side wall and two end walls houses a filter element, typically hollow frustum-shaped. A plurality of entrance openings around the periphery of one end wall admit intake air into the canister on one side of the filter element while a central exit opening in the opposite end wall directs the air to the engine after passing through the filter. The entrance openings are sized to create a predetermined pressure drop across the entrance. An inner wall spaced from the sidewall forms and annular space therebetween. An inlet at the top admits breather fumes into the annulus, with a barrier wall between the inner wall and sidewall forces the fumes to travel around the canister through the annulus to an exit connecting the annulus to the canister interior. A condensed oil exit removes oil condensed in the cool annulus and oil droplets forced into contact with the side wall by centrifugal forces. A small portion of the oil does not condense and serves to lightly wet the filter element to improve filter entrapment of very fine particles.

REFERENCES:
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patent: 4136650 (1979-01-01), Manookian
patent: 4409950 (1983-10-01), Goldberg
patent: 4459966 (1984-07-01), Sakano et al.
patent: 4517951 (1985-05-01), Otaka et al.
patent: 4627406 (1986-12-01), Namiki et al.
patent: 4724807 (1988-02-01), Walker
patent: 4920930 (1990-05-01), Sakano et al.
patent: 5140957 (1992-08-01), Walker

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