Fuel supply control for a dual induction type engine intake syst

Details Fuel supply control for a dual induction type engine intake syst Fuel supply control for a dual induction type engine intake syst

1984-05-22

1986-09-09

Miller, Carl Stuart

Internal-combustion engines

Charge forming device

Auxiliary air or oxygen added to combustible mixture

123489, 123492, F02M 5100

Patent

active

046102361

ABSTRACT:
An intake system for an internal combustion engine has a primary intake passage and a secondary intake passage both leading to a combustion chamber and respectively having a primary fuel injecting valve and a secondary fuel injecting valve. A control valve is provided in the secondary intake passage for closing the same under light load engine operation and opening the same under heavy load engine operation so that the intake mixture is introduced into the combustion chamber only through the primary intake passage under light load engine operation and through both the primary and secondary intake passages under heavy load operation. A control unit is provided for operating the primary and secondary fuel injecting valves in accordance with the engine operating condition so that fuel is injected only through the primary fuel injecting valve under light load operation. The control unit functions to decrease the quantity of fuel supply for a predetermined time period when it is detected that the fuel supply through the secondary fuel injecting valve is interrupted to thereby prevent the mixture from being momentarily enriched.

REFERENCES:
patent: 4445483 (1984-05-01), Hasegawa
patent: 4471742 (1984-09-01), Kishi

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