Dual EGO sensor closed loop fuel control

Details Dual EGO sensor closed loop fuel control Dual EGO sensor closed loop fuel control

1991-06-28

1992-05-26

Lararus, Ira S.

Power plants

Internal combustion engine with treatment or handling of...

Methods

60276, 60285, 123489, F01N 320

Patent

active

051156393

ABSTRACT:
Air/fuel ratio control for an internal combustion engine includes the use of a first exhaust gas oxygen sensor (EGO) upstream of a catalytic converter and a second exhaust gas oxygen sensor downstream of the catalytic converter. The output of the first EGO sensor is passed through a high pass filter and then combined in a summer with the output of the second EGO sensor. The output of the summer is applied to a proportional and integral controller which then provides an output used to generate the fuel control signal.

REFERENCES:
patent: 3939654 (1976-02-01), Creps
patent: 4027477 (1977-06-01), Storey
patent: 4304204 (1981-12-01), Glocker et al.
patent: 4463594 (1984-08-01), Raff et al.
patent: 4526147 (1985-07-01), Grob
patent: 4534330 (1985-08-01), Osuga et al.
patent: 4693076 (1987-09-01), Chujo et al.
patent: 4831838 (1989-05-01), Nagai et al.
patent: 4840027 (1989-06-01), Okumura et al.
patent: 4854124 (1989-08-01), Tamura

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