Positive crank case ventilation valve and internal combustion en

Details Positive crank case ventilation valve and internal combustion en Positive crank case ventilation valve and internal combustion en

1977-10-21

1979-06-19

Casaregola, Louis J.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

123 4186, F02M 2506

Patent

active

041583531

ABSTRACT:
An internal combustion engine including an air intake and a crank case, a positive crank case ventilation valve having a valve body, a cavity within the valve body, a first valve seat within the cavity, a second valve seat within the cavity and smaller than the first valve seat, a valve member within the cavity and configured to substantially close the cavity to the ambient and yet be movable therein to a position seated against both the valve seat and to a position spaced from the seond valve seat, a passage terminating at the second valve seat, a port terminating in the cavity between the first and second valve seats, a conduit extending between the passage and the air intake of the engine, and a conduit extending between the port and the crank case. The difference in areas of the two valve seats permits crank case pressure to be closely controlled.

REFERENCES:
patent: 2585863 (1952-12-01), Smith
patent: 2775960 (1957-01-01), Druzynski
patent: 3144011 (1964-08-01), Anthes
patent: 3144044 (1964-08-01), Anthes

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