Engine air/fuel control system

Details Engine air/fuel control system Engine air/fuel control system

1995-06-30

1996-05-14

Argenbright, Tony M.

Internal-combustion engines

Combustion chamber means combined with air-fuel mixture...

123672, 123689, F02D 4114

Patent

active

055158269

ABSTRACT:
An engine air/fuel control system modulates the flow of fuel delivered to the engine with a modulation signal (100, 144) The feedback variable generated (210-228) from a two-state exhaust gas oxygen sensor (16) corrects the fuel flow (156). During each of a plurality of pre-determined intervals, the fuel flow is biased with a rich offset (342). Amplitude of the modulation signal is corrected by a difference between the feedback variable generated during two successive occurrences of the predetermined interval (346-378).

REFERENCES:
patent: 4132199 (1979-01-01), Kuroiwa et al.
patent: 4377143 (1983-03-01), Hamburg
patent: 5211011 (1993-05-01), Nishikawa et al.
patent: 5275142 (1994-01-01), Kapellen et al.
patent: 5315823 (1994-05-01), Nishikawa et al.
patent: 5392599 (1995-02-01), Hamburg et al.

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