Title :
Control of an SCR catalytic converter system for a mobile heavy-duty application
Author :
Schär, Christoph M. ; Onder, Christopher H. ; Geering, Hans P.
Author_Institution :
Meas. & Control Lab., Zurich, Switzerland
fDate :
7/1/2006 12:00:00 AM
Abstract :
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 (NOx) sensor which is cross-sensitive against ammonia (NH3), and the implementation of a procedure separating the detection of NOx and NH3.
Keywords :
catalysis; diesel engines; exhaust systems; feedback; feedforward; process control; reduced order systems; vehicles; SCR catalytic converter system; exhaust gas aftertreatment; feedback control; mobile heavy-duty diesel application; model based feedforward control; nitrogen oxide sensor; selective catalytic reduction; Atomic measurements; Control systems; Diesel engines; Exhaust systems; Laboratories; Nitrogen; Oxidation; Steady-state; Temperature; Thyristors; Diesel engines; exhaust gas aftertreatment; modeling; optimal control; process control; robustness;
Journal_Title :
Control Systems Technology, IEEE Transactions on
DOI :
10.1109/TCST.2006.876634