Control of an SCR catalytic converter system for a mobile heavy-duty application

Selective catalytic reduction (SCR) is well known for exhaust gas aftertreatment in power plant applications. In the near future, it will be introduced in Europe in mobile heavy-duty diesel applications. Stringent specifications and the dynamic operation mode of such applications demand advanced con...

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Bibliographic Details
Published in:IEEE transactions on control systems technology 2006-07, Vol.14 (4), p.641-653
Main Authors: Schar, C.M., Onder, C.H., Geering, H.P.
Format: Article
Language:English
Subjects:
Applied sciences
Atomic measurements
Computer science
control theory
systems
Control systems
Control theory
Control theory. Systems
Diesel engines
Dynamical systems
Dynamics
Exact sciences and technology
exhaust gas aftertreatment
Exhaust systems
Feedback
Feedback control
Feedforward
Laboratories
modeling
Nitrogen
optimal control
Oxidation
process control
Process control. Computer integrated manufacturing
robustness
Selective catalytic reduction
Steady-state
Strategy
Temperature
Thyristors
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Summary:Selective catalytic reduction (SCR) is well known for exhaust gas aftertreatment in power plant applications. In the near future, it will be introduced in Europe in mobile heavy-duty diesel applications. Stringent specifications and the dynamic operation mode of such applications demand advanced control strategies. Such a control strategy is presented here. It incorporates a model-based feedforward controller (FFC) which handles the known dynamics of the plant. It further contains a feedback controller (FBC) to compensate for disturbances and slowly varying parameters. The realization of the feedback control loop is possible only due to the use of a nitrogen oxide (NO/sub x/) sensor which is cross-sensitive against ammonia (NH/sub 3/), and the implementation of a procedure separating the detection of NO/sub x/ and NH/sub 3/.
ISSN:1063-6536
1558-0865
DOI:10.1109/TCST.2006.876634