Feedback control in selective catalytic reduction

Details Feedback control in selective catalytic reduction Feedback control in selective catalytic reduction

2008-01-23

2011-10-11

Ramdhanie, Bobby (Department: 1774)

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Automatic analytical monitor and control of industrial process

Reexamination Certificate

active

08034291

ABSTRACT:
An apparatus for introducing a reductant into an exhaust system is described. The apparatus includes a controller that generates a resulting dosing command used as an instruction to release an amount of reductant into the exhaust system. The controller includes a feedback control module that generates a weighing factor. The weighing factor is configured to be applied to a lower limit dosing command and configured to be applied to an upper limit dosing command, where the lower and upper limit dosing commands converted by the weighing factor are used by the controller to generate the resulting dosing command.

REFERENCES:
patent: 4473536 (1984-09-01), Carberg et al.
patent: 2007/0220865 (2007-09-01), Cunningham et al.
patent: 2000-220438 (2000-08-01), None
patent: 10-2003-0076976 (2003-09-01), None
International Search Report of PCT/US2009/030738, dated Aug. 25, 2009.
Written Opinion of the International Searching Authority of PCT/US2009/030798, dated Aug. 25, 2009.

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