Proportional fuel vapor purge flow control apparatus

Details Proportional fuel vapor purge flow control apparatus Proportional fuel vapor purge flow control apparatus

1977-07-05

1979-01-09

Cox, Ronald B.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

F02M 5900

Patent

active

041333284

ABSTRACT:
In a fuel vapor recovery system for an internal combustion engine, a proportional fuel vapor purge flow control apparatus is used to regulate the flow of a fuel vapor-air mixture to the induction system of the engine, the flow control apparatus including a variable area flow control valve which is diaphragm operated by exhaust back pressure to provide a canister purge flow area which is proportional to exhaust back pressure and a vacuum regulator operative to provide a constant pressure differential across the variable area valve.

REFERENCES:
patent: 3752134 (1973-08-01), Hollis
patent: 3913545 (1975-10-01), Haase et al.

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