Method of controlling exhaust-gas recirculation in internal comb

Details Method of controlling exhaust-gas recirculation in internal comb Method of controlling exhaust-gas recirculation in internal comb

1982-09-30

1984-10-23

Burns, Wendell E.

Internal-combustion engines

Charge forming device

Crankcase vapor used with combustible mixture

123568, F02M 2506

Patent

active

044781997

ABSTRACT:
A method of controlling the recirculation of exhaust gases in an internal combustion engine provided with an exhaust-gas recirculation system by which the exhaust gases emitted from the exhaust manifold are partially recirculated into the intake manifold of the engine, comprising cutting off the recirculation of exhaust gases to the intake manifold of the engine when the engine is being warmed up, recirculating exhaust gases to the intake manifold of the engine at a rate variable in a predetermined required exhaust-gas recirculation ratio to the rate at which air is circulated to the intake manifold of the engine after the engine is warmed up, and recirculating exhaust gases to the intake manifold of the engine with a reduced exhaust-gas recirculation ratio lower than said required exhaust-gas recirculation ratio during a transient period of time intervening the conditions in which the engine is being warmed up and the conditions in which the engine has been warmed up.

REFERENCES:
patent: 4164032 (1979-08-01), Nohira et al.
patent: 4385616 (1983-05-01), Kobayashi et al.
patent: 4390001 (1983-06-01), Fujimoto
patent: 4399791 (1983-08-01), Kobayashi et al.

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