Stephan Stadlbauer, Harald Siegfried Waschl, Luigi Del Re,
"SCR Ammonia Dosing Control by a Nonlinear Model Predictive Controller"
: The 19th World Congress of the International Federation of Automatic Control, Seite(n) 3018-3023, 8-2014
Original Titel:
SCR Ammonia Dosing Control by a Nonlinear Model Predictive Controller
Sprache des Titels:
Englisch
Original Buchtitel:
The 19th World Congress of the International Federation of Automatic Control
Original Kurzfassung:
To deal with the demanding goals of the restricted Diesel emission leg
islation the
focus in the application of exhaust after treatment systems to fu
lfill these strict requirements
moves more and more to model based design, optimization and contr
ol.
Against this background a nonlinear model predictive control (MPC
) for an exhaust after
treatment system consisting of a DOC (Diesel oxidation catalyst),
a DPF (Diesel particulate
filter) and a SCR (selective catalytic reduction) is proposed. Similar t
o standard ammonia
control schemes also in this study the dosing amount is the only adju
stable input variable.
But in contrast to these usually simple feed forward dosing approac
hes in this proposal also
information about the nonlinear temperature behavior and the sto
rage effects of the SCR -
included in a nonlinear SCR model - can be considered for the ammonia c
ontrol. Based on
these improved knowledge of the system a nonlinear model predictiv
e controller, also applicable
for real time tests on the engine, is applied for SCR control leading t
o promising results in
simulation.