Closed loop fuel control using air injection in open loop modes

Details Closed loop fuel control using air injection in open loop modes Closed loop fuel control using air injection in open loop modes

1975-05-08

1976-10-19

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

Having means analyzing composition of exhaust gas

60284, 60285, 60289, 60294, F02B 7510

Patent

active

039863522

ABSTRACT:
A fuel control for an engine is normally operated closed loop with a feedback signal from an air-fuel ratio sensor in the engine exhaust. However, during idle, wide open throttle and engine warm up operating modes, the closed loop control is cut out and the engine is run rich with air injected into the exhaust system to reduce carbon monoxide and hydrocarbon emissions.

REFERENCES:
patent: 3745768 (1973-07-01), Zechnall
patent: 3805522 (1974-04-01), Sheppard
patent: 3832848 (1974-09-01), Scholl
patent: 3863444 (1975-02-01), Nakajima

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