Power plants – Internal combustion engine with treatment or handling of... – By means producing a chemical reaction of a component of the...
Reexamination Certificate
2005-11-15
2005-11-15
Tran, Binh Q. (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, C060S286000, C123S696000, C701S103000
Reexamination Certificate
active
06964159
ABSTRACT:
The invention relates to a new method and system for optimizing the efficiency of an automotive catalytic converter. The claimed invention comprises adjusting an air/fuel ratio in the cylinders of an internal combustion engine to maintain a desired level of oxidants in the catalytic converter. At various times, the actual amount of oxidants stored in the catalytic converter is determined. The actual oxidant amount is compared to a target amount of oxidants to be stored in the catalytic converter. The air/fuel ratio in the cylinders is adjusted based on magnitude of the difference between the actual oxidant amount and the target oxidant amount to prevent NOx and hydrocarbon breakthrough.
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SAE 1999-01-3476, “A Simplified Approach to Modeling Exhaust System Emissions: SIMTWC”, Laing et al.
Bower, Jr. Stanley Larue
Carlstrom Kevin Ronald
Hahn Stephen L.
Lewis Donald James
Alleman Hall McCoy Russell & Tuttle LLP
Ford Global Technologies LLC
Lippa Allen J.
Tran Binh Q.
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