Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 5 of 5 for “"Urea-SCR"”.
-
Heavy-duty diesel vehicle Nox̳ aftertreatment in 2010 : the infrastructure and compliance challenges of urea-SCR
… in 2010, has stimulated debate over whether urea selective catalytic reduction (urea-SCR) or lean NOx traps (LNT) are the better NOx aftertreatment approach for meeting this new standard. And, if urea-SCR is indeed the preferred option, how can its compliance and infrastructure challenges be …
-
Physics based modeling of urea selective catalytic reduction systems
… thesis addresses control-oriented modeling of urea-selective catalytic reduction (SCR) after-treatment systems used for reducing NO, emission in diesel vehicles. Starting from first-principles, appropriate simplifications are made in the underlying energy and species equations to yield simple …
-
Adaptive PI control of NOx̳ emissions in a Urea Selective Catalytic Reduction System using system identification models
The Urea SCR System has shown great potential for implementation on diesel vehicles wanting to meet the upcoming emission regulations by the EPA. The objective of this thesis is to develop an adaptive controller that is capable of uniformly maintaining a high efficiency and a low ammonia slip in …
-
The Effect Of Biodiesel Blends On A Multi-Cylinder Engine And The Impact On Aftertreatment
<p>Recently, topics including global warming, increased environmental awareness, recycling, and organically produced meat and vegetables have been prevalent in the media and research arenas. The rapidly increasing cost for fossil fuels and the pursuit of environmental conservation has brought about …
-
Katalytische Partikeloxidation im Kontext von Harnstoff-SCR und Partikelkonfektionierung
… eine Analyse des Einflusses von Harnstoff-SCR-Technik auf die Partikelemission. Zudem wurde mit der Partikelkonfektionierung durch motorische Maßnahmen eine Möglichkeit zur Verbesserung der katalytischen Partikeloxidation aufgezeigt und untersucht. Untersuchungen mit einem Nfz-Dieselmotor …