METHOD AND DEVICE FOR CONTROLLING AN SCR CATALYTIC CONVERTER OF A VEHICLE
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United States of America Patent
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Dec 6, 2012
app pub date -
Dec 22, 2010
filing date -
Dec 23, 2009
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Abstract
The present invention provides for a method and apparatus for controlling an SCR catalytic converter (2). The invention describes a model-based control method including a physical model of the SCR catalyst (2) with more than one NH3 storage cell and a physical model of a NOx sensor (4). The observer feedback gain forces the estimated sensor outputs from the model to converge to measured ones, therefore, there is not ambiguity in the determination of the operating point.
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