Lean air/fuel control system for an internal combustion engine

Details Lean air/fuel control system for an internal combustion engine Lean air/fuel control system for an internal combustion engine

1996-02-05

1996-12-10

Nelli, Raymond A.

Internal-combustion engines

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

F02P 514

Patent

active

055821502

ABSTRACT:
An air/fuel control system for an engine (10) provides an air/fuel indicating signal linearly related to average engine air/fuel operation from a two-state exhaust gas oxygen sensor (76). Fuel delivered to the engine is modulated with a periodic or modulation signal (244). The modulation signal is offset in either a fuel increasing or a fuel decreasing direction when the air/fuel indicating signal is respectively saturated at either a lean or a rich value (394-420).

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patent: 5027771 (1991-07-01), Daikoku et al.
patent: 5211011 (1993-05-01), Nishikawa et al.
patent: 5483946 (1996-01-01), Hamburg et al.
patent: 5515826 (1996-05-01), Hamburg et al.

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