Open loop fuel controller

Details Open loop fuel controller Open loop fuel controller

2006-09-05

2006-09-05

Denion, Thomas (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

C060S274000, C060S276000, C060S299000

Reexamination Certificate

active

07100364

ABSTRACT:
This invention relates to an apparatus for controlling the air-fuel ratio demanded by a fuel controller in order to maintain optimum performance of a catalytic converter. Provided is an open loop fuel controller comprising a detector arranged down stream of a catalyst for detecting rich breakthrough; a catalyst model having an estimator for estimating a stored oxygen level in the catalyst; a comparator for comparing an estimated stored oxygen level with a plurality of predetermined thresholds; demand adjusting means for adjusting an air fuel ratio demand in dependence upon a received signal from said comparator and upon a received signal from said detector. A method of open loop fuel control is also provided.

REFERENCES:
patent: 5282360 (1994-02-01), Hamburg et al.
patent: 5842340 (1998-12-01), Bush et al.
patent: 5901552 (1999-05-01), Schnaibel et al.
patent: 6497093 (2002-12-01), Lewis et al.

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