| 54 |
Title |
TI |
[DE] Verfahren zur Erkennung des Ammoniakspeicherzustands eines SCR-Katalysators
[EN] Method for detecting current state of exhaust after-treatment system in e.g. motor car, involves determining measured variables in different frequency ranges to allow measuring device to provide conclusions about memory state |
| 71/73 |
Applicant/owner |
PA |
Fischerauer, Gerhard, Prof. Dr.-Ing., 95447, Bayreuth, DE
;
Moos, Ralf, Prof. Dr. Ing., 95447, Bayreuth, DE
;
Reiß, Sebastian, Dipl.-Ing., 95448, Bayreuth, DE
|
| 72 |
Inventor |
IN |
Fischerauer, Gerhard, Prof. Dr.-Ing., 95447, Bayreuth, DE
;
Moos, Ralf, Prof. Dr. Ing., 95447, Bayreuth, DE
;
Reiß, Sebastian, Dipl.-Ing., 95448, Bayreuth, DE
|
| 22/96 |
Application date |
AD |
Aug 20, 2010 |
| 21 |
Application number |
AN |
102010034983 |
|
Country of application |
AC |
DE |
|
Publication date |
PUB |
Feb 23, 2012 |
33
31
32 |
Priority data |
PRC
PRN
PRD |
|
| 51 |
IPC main class |
ICM |
F01N 9/00
(2006.01)
|
| 51 |
IPC secondary class |
ICS |
F01N 11/00
(2006.01)
F01N 3/10
(2006.01)
|
|
IPC additional class |
ICA |
|
|
IPC index class |
ICI |
|
|
Cooperative patent classification |
CPC |
F01N 2560/021
F01N 2560/12
F01N 3/208
G01N 22/00
Y02A 50/20
Y02T 10/12
|
|
MCD main class |
MCM |
F01N 9/00
(2006.01)
|
|
MCD secondary class |
MCS |
F01N 11/00
(2006.01)
F01N 3/10
(2006.01)
|
|
MCD additional class |
MCA |
|
| 57 |
Abstract |
AB |
[DE] Es wird ein Verfahren zur Erkennung des Speicherzustands eines Selective-Catalytic-Reduction-(SCR-)Ksionen von Verbrennungsmotoren vorgeschlagen. Während des Betriebs wird der Katalysator mit Ammoniak (NH3) be- und entladen. Genutzt wird die Ausbreitung elektromagnetischer Wellen innerhalb eines Hohlleiters bzw. ihre Resonanz in einem Hohlraumresonator. Dabei verändert sich die Charakteristik der Ausbreitung aufgrund der Zustandsänderungen des Abgasnachbehandlungssystems (Hohlraumresonatorstörung). Durch geeignete Wahl der Auswertefrequenzen und Auswerteparameter können Störeinflüsse auf die Messung differenziert werden. Damit wird eine kontinuierliche Überwachung oder Regelung der Abgasnachbehandlung mit der SCR-Technik ermöglicht.
[EN] The method involves propagating electromagnetic waves in a metallic housing (2), where the waves are interfered by a state of catalyst systems. The metallic housing is arranged in a selective-catalytic-reduction (SCR)-catalyzer (1). Measured variables such as reflectance factor amount and resonance frequency difference, are determined in different frequency ranges to allow a measuring device to provide conclusions about a memory state under consideration of transverse influences. |
| 56 |
Cited documents identified in the search |
CT |
DE102010019309A1
|
| 56 |
Cited documents indicated by the applicant |
CT |
DE000010358495A1
DE102008012050A1
US000004477771A
US000005497099A
|
| 56 |
Cited non-patent literature identified in the search |
CTNP |
WANG, Da Yu [et al.]: Ammonia sensor for closed-loop SCR control. 2008 (SAE technical paper series ; 2008-01-0919) n
|
| 56 |
Cited non-patent literature indicated by the applicant |
CTNP |
D. Y. Wang, S. Yao, M. Shost, J. Yoo, D. Cabush, D. Racine, R. Cloudt, F. Willems: Ammonia sensor for Closed-Loop SCR Control. SAE paper 2008-01-0919 (2008) 1
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Citing documents |
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Determine documents
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Sequence listings |
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Search file IPC |
ICP |
F01N 11/00
F01N 3/10 R1
F01N 9/00 SZ
F01N 9/00
|
