Air/fuel control system with hego current pumping

Details Air/fuel control system with hego current pumping Air/fuel control system with hego current pumping

1993-10-06

1995-01-10

Lazarus, Ira S.

Power plants

Internal combustion engine with treatment or handling of...

Having means analyzing composition of exhaust gas

60285, 123703, F01N 320

Patent

active

053795903

ABSTRACT:
A control system for maintaining engine air/fuel operation within the efficiency window of a catalytic converter. An exhaust gas oxygen sensor having a step change between first and second output states and positioned downstream of the converter. A step change in the downstream sensor output is initialized to an initial air/fuel ratio by pumping current through one of the sensing electrodes of the downstream sensor. An emission control signal is derived from the initialized downstream sensor output to bias an air/fuel feedback loop.

REFERENCES:
patent: 4046118 (1977-09-01), Aono
patent: 4057042 (1977-11-01), Aono
patent: 4167924 (1979-09-01), Carlson
patent: 4167925 (1979-09-01), Hosaka
patent: 4210106 (1980-07-01), Wessel
patent: 4534330 (1985-08-01), Osuga

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