Fixed metered orifice device for PCV systems of internal combust

Details Fixed metered orifice device for PCV systems of internal combust Fixed metered orifice device for PCV systems of internal combust

Filed on

1977-01-21

Date issued

1978-11-07

Examiner

Myhre, Charles J.

Patent Class

Internal-combustion engines

SubClass

Intake manifold

SubSubClass

Manifold tuning, balancing or pressure regulating means

Other Related Categories

F02M 2506

Type

Patent

Status

active

Patent number

041240073

Description

ABSTRACT:
A positive crankcase ventilation (PCV) metering device is adapted to be interposed between and fluidically connected to a conventional PCV valve at one end thereof and to the engine intake manifold at the other end thereof. The device has an axial passageway extending therethrough for conducting the vapors from the crankcase to the intake manifold, and a plurality of orifices, defined within and about the periphery of the device, are fluidically connected to the axial passageway and to atmosphere so as to always supply a metered amount of atmospheric air to the passageway under all engine conditions, whereby the high differential pressure across the PCV valve will be substantially reduced so as not to draw an excessive amount of oil droplets or vapor from the crankcase.

REFERENCES:
patent: 2291879 (1942-08-01), Chandler
patent: 2720196 (1955-10-01), Wolf
patent: 2818052 (1957-12-01), Trainer
patent: 3059628 (1962-10-01), Linn
patent: 3172348 (1965-03-01), Berg
patent: 3176670 (1965-04-01), Sinibaldi
patent: 3177858 (1965-04-01), Vanderpoel
patent: 3564580 (1971-02-01), Cinque
patent: 3712281 (1973-01-01), Ruth
patent: 3820518 (1974-06-01), Dolfi
patent: 3990420 (1976-11-01), Bitterman

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