Exhaust gas recirculating system

Details Exhaust gas recirculating system Exhaust gas recirculating system

1974-08-07

1977-04-19

Burns, Wendell E.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

F02M 2506

Patent

active

040181987

ABSTRACT:
An exhaust gas recirculation system for a vehicle internal combustion engine recirculates exhaust gases to the intake manifold of the engine to reduce smog-producing exhaust emission. Exhaust gases are recirculated into the intake manifold only during certain vehicle operating conditions. An injection means responsive to application of intake manifold vacuum governs injection of exhaust gases into the intake manifold. A vacuum control means allows application of intake manifold vacuum to the injection means only when activated. A control means responsive to vehicle operating parameters selectively activates the vacuum control means. With application of vacuum, the injection means allows recirculation of exhaust gases into the intake manifold.

REFERENCES:
patent: 3446196 (1969-05-01), Daigh
patent: 3512509 (1970-05-01), Daigh
patent: 3799133 (1964-03-01), Frank
patent: 3807376 (1974-04-01), Glockler et al.
patent: 3809038 (1974-05-01), Young

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