Practical Achievable Performance in Diesel Oxidation Catalyst Temperature Control

Lepreux, Olivier; Creff, Yann; Petit, Nicolas

doi:10.2516/ogst/2011115

Cited by 3 publications

(3 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“… ± 15 ∘ C) than that of IMC-based composite controller, which is the best practically achievable result. 7,21…”

Section: Simulation Resultsmentioning

confidence: 99%

“…More importantly, the undershoot and overshoot phenomenon is a non-minimum phase behavior, which has a challenging impact on the control of DOC-out temperature. Due to the input time delay, this phenomenon is difficult to compensate for and has side effects, as demonstrated by Lepreux et al 7,21…”

Section: System Dynamics and Modeling Of Docmentioning

confidence: 99%

“…More importantly, the undershoot and overshoot phenomenon is a non-minimum phase behavior, which has a challenging impact on the control of DOCout temperature. Due to the input time delay, this phenomenon is difficult to compensate for and has side effects, as demonstrated by Lepreux et al 7,21 Linear model of the DOC Although a detailed 1-D thermal dynamic model of DOC is proposed by Voltz et al, 14 the parameters for thermal dynamics and reactions are complex and difficult to precisely determine. Also, the concentration and the reaction rate are difficult to accurately measure.…”

Section: Time Delay and Non-minimum Phase Behavior Of The Docmentioning

confidence: 99%

See 2 more Smart Citations

Disturbance rejection in DOC-out temperature control for DPF regeneration

Ning

Yan

2016

Proceedings of the Institution of Mechanical Engineers, Part D:

View full text Add to dashboard Cite

Control of diesel oxidation catalyst (DOC) outlet temperature is critical for downstream diesel particulate filter regeneration, but is challenging to control due to the non-minimum phase behavior and varying time delay. To effectively address this issue, a novel and time-efficient composite controller based on modified active disturbance rejection control (mADRC) is proposed for DOC-out temperature control in this paper. The proposed mADRC-based composite controller is a new combination of a model-based feedforward controller and a mADRC with time delay compensation through the mass flow rate of exhaust gas. The model-based feedforward controller is designed to partially compensate the variations of DOC inlet temperature and mass flow rate, while the mADRC is proposed to address the remain disturbances and model uncertainties including time delay uncertainties. Simulation and test results through a high-fidelity Gamma Technologies-Power model demonstrate the effectiveness and robustness of the proposed composite controller in the DOC-out temperature control under steady state and a highly transient new European dynamic cycle (NEDC).

show abstract

“… ± 15 ∘ C) than that of IMC-based composite controller, which is the best practically achievable result. 7,21…”

Section: Simulation Resultsmentioning

confidence: 99%

Section: System Dynamics and Modeling Of Docmentioning

confidence: 99%

Section: Time Delay and Non-minimum Phase Behavior Of The Docmentioning

confidence: 99%

See 1 more Smart Citation

Disturbance rejection in DOC-out temperature control for DPF regeneration

Ning

Yan

2016

Proceedings of the Institution of Mechanical Engineers, Part D:

View full text Add to dashboard Cite

show abstract

Slow gas flow passing a solid is a convection/diffusion equation

Bresch‐Pietri

Petit

2019

IFAC-PapersOnLine

View full text Add to dashboard Cite

Model-based temperature control of a diesel oxidation catalyst

Lepreux¹,

Creff²,

Petit³

2012

Journal of Process Control

View full text Add to dashboard Cite

To cite this version:Olivier Lepreux. Model-based Temperature Control of a Diesel Oxidation Catalyst . Mathematics T H E S E pour obtenir le grade de DOCTEUR DE L'ECOLE NATIONALE SUPERIEURE DES MINES DE PARIS RésuméLe problème étudié dans cette thèse est la commande d'un système DOC (Diesel Oxidation Catalyst) tel qu'utilisé dans les systèmes de dépollution des gaz d'échappement des moteurs Diesel automobiles.Ce système est par nature un système à paramètres répartis en raison de sa géométrie allongée parcourue par un flux gazeux en contact avec un catalyseur réparti. Après avoir étudié expérimenta-lement ce système, nous avons décidé de prendre en compte cette nature répartie, qui comme on le montre, se retrouve également dans les autres systèmes de dépollution (filtres à particules, pièges à NOx, SCR).Une première contribution du manuscrit consiste en un modèle du système DOC. Celui-ci est obtenu par des simplifications successives, justifiées expérimentalement (observations, estimations des ordres de grandeurs) ou par analyse des équations régissant la dynamique du système (déve-loppements asymptotiques, changements de variables). Ce modèle permet de rendre compte de la complexité de la réponse de la température de sortie du DOC à des variations des grandeurs d'entrée. En particulier, les effets de réponses inverses et de retards sont bien représentés.Une seconde contribution est un ensemble d'algorithmes de commande (précompensation, rétro-action, et synchronisation) permettant de maîtriser les phénomènes thermiques dans le DOC.Ces deux contributions ont été testées expérimentalement et validées. En conclusion, les performances obtenues sont évaluées. En résumé, en utilisant l'approche présentée dans ce manuscrit, il est possible de commander, en conditions réelles, la température de sortie du DOC à ±15 • C. 6 SummaryThe problem studied in this thesis is the control of a DOC (Diesel Oxidation Catalyst) as used in aftertreatment systems of diesel vehicles.This system is inherently a distributed parameter system due to its elongated geometry where a gas stream is in contact with a distributed catalyst. After having studied this system experimentally, we decided to take into account its distributed nature, which as shown, is also found in other aftertreatment devices (particulate filters, NOx traps, SCR).A first contribution of the thesis is a model for the DOC system. It is obtained by successive simplifications justified either experimentally (from observations, estimates of orders of magnitudes) or by an analysis of governing equations (through asymptotic developments, change of variables). This model can account for the complexity of the temperature response of DOC output to changes in input variables. In particular, the effects of inverse responses and delays are well represented.A second contribution is a combination of algorithms (feedback, feedforward, and synchronization) to control the thermal phenomena in the DOC.Both contributions have been tested and validated experimentally. In conclusion, the o...

show abstract

Practical Achievable Performance in Diesel Oxidation Catalyst Temperature Control

Cited by 3 publications

References 9 publications

Disturbance rejection in DOC-out temperature control for DPF regeneration

Disturbance rejection in DOC-out temperature control for DPF regeneration

Slow gas flow passing a solid is a convection/diffusion equation

Model-based temperature control of a diesel oxidation catalyst

Contact Info

Product

Resources

About