Phase and frequency error based asymmetrical AFR pulse...

Details Phase and frequency error based asymmetrical AFR pulse... Phase and frequency error based asymmetrical AFR pulse...

2008-06-02

2010-10-05

Cronin, Stephen K (Department: 3747)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

C123S672000

Reexamination Certificate

active

07809490

ABSTRACT:
A fuel control system of an engine system comprising a pre-catalyst exhaust gas oxygen (EGO) sensor and a control module. The pre-catalyst EGO sensor determines a pre-catalyst EGO signal based on an oxygen concentration of an exhaust gas. The control module determines a dither signal. The control module determines a fuel command based on the pre-catalyst EGO signal and the dither signal.

REFERENCES:
patent: 4386592 (1983-06-01), Ohgami et al.
patent: 4402292 (1983-09-01), Ohgami et al.
patent: 4402293 (1983-09-01), Ohgami
patent: 5385134 (1995-01-01), Krohm et al.
patent: 5996337 (1999-12-01), Blosser et al.
patent: 6892528 (2005-05-01), Okada et al.

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