Chemical apparatus and process disinfecting – deodorizing – preser – Control element responsive to a sensed operating condition
Reexamination Certificate
2009-04-03
2010-06-15
Vanoy, Timothy C (Department: 1793)
Chemical apparatus and process disinfecting, deodorizing, preser
Control element responsive to a sensed operating condition
C422S108000, C422S111000, C423S213200, C423S239100, C423SDIG018, C060S276000, C060S299000, C700S271000, C700S274000
Reexamination Certificate
active
07736595
ABSTRACT:
A dosing control system comprises a selective catalytic reduction (SCR) analysis module and a dosing management module. The SCR analysis module estimates ammonia (NH3) stored by an SCR catalyst, maximum NH3 storage capacity of the SCR catalyst, NH3 slip downstream of the SCR catalyst, NH3 oxidation, and NH3 conversion through reaction with nitrogen oxides (NOx). The NH3 stored is estimated based an amount of dosing agent injected, the NH3 slip, the NH3 oxidation, and the NH3 conversion. The dosing management module controls dosing agent injection into an exhaust system upstream of the SCR catalyst based on the NH3 stored by the SCR catalyst and the maximum NH3 storage capacity.
REFERENCES:
patent: 6981368 (2006-01-01), van Nieuwstadt et al.
patent: 2009/0272104 (2009-11-01), Garimella et al.
Gady Kevin Andrew
Gangopadhyay Anupam
GM Global Technology Operations Inc.
Vanoy Timothy C
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