Integrated feedback controlled secondary air injection and egr

Details Integrated feedback controlled secondary air injection and egr Integrated feedback controlled secondary air injection and egr

1992-12-07

1993-12-21

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

Methods

60278, 60289, F02M 2506

Patent

active

052712214

ABSTRACT:
An integral system controls exhaust gas recirculation and secondary air injection for an internal combustion engine. An air pump is coupled to the exhaust manifold through a series combination of a secondary air control valve, a check valve and an orifice for measuring flow. An intake manifold is coupled to the exhaust manifold through an exhaust gas recirculation flow control valve and the orifice. A vacuum source is selectively coupled to the secondary air control valve and the EGR flow control valve for introducing secondary air to the exhaust manifold or introducing exhaust gas recirculation to the intake manifold.

REFERENCES:
patent: 3580232 (1971-05-01), Sarto
patent: 4088101 (1978-05-01), Wakita
patent: 4149377 (1979-04-01), Takagi

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