Show simple item record

dc.contributor.author
Auckenthaler, Theophil S.
dc.contributor.author
Onder, Christopher H.
dc.contributor.author
Geering, Hans P.
dc.date.accessioned
2017-06-11T16:17:18Z
dc.date.available
2017-06-11T16:17:18Z
dc.date.issued
2004
dc.identifier.issn
0148-7191
dc.identifier.issn
0096-5170
dc.identifier.other
10.4271/2004-01-0525
dc.identifier.uri
http://hdl.handle.net/20.500.11850/98380
dc.description.abstract
Very stringent limits for exhaust gas emissions as well as high claims for onboard diagnosis (OBD) of the three-way catalytic converter (TWC) demand a sophisticated control and observer strategy which can both further reduce the exhaust gas emissions and also estimate the relevant parameters allowing to monitor the decreasing performance of the TWC over its lifetime. The most crucial parameter and state, respectively, are widely believed to be the oxygen storage capacity (OSC) and the relative oxygen level (ROL) of the TWC. The TWC's performance decreases with a diminishing OSC. Therefore, an accurate estimation of the OSC can be used for OBD. Keeping the ROL at an optimal level by means of control enhances the TWC's performance significantly, even during transients of the air/fuel ratio imposed by the driver. In order to monitor both the ROL and the OSC, an observer has been derived from a complex TWC model. The observer consists of an extended Kalman filter (EKF), which estimates the ROL of the TWC from the exhaust gas mass flow, the temperature and the lambda-sensor signal upstream of the TWC. Additionally, the gas composition and the signal of a sensor downstream are estimated in order to close the loop for the EKF. The EKF also estimates the OSC by means of online estimation.
dc.language.iso
en
dc.publisher
SAE
dc.title
Online Estimation of the Oxygen Storage Level of a Three-Way Catalyst
dc.type
Working Paper
ethz.journal.title
SAE Technical Papers
ethz.journal.abbreviated
SAE Tech. Pap.
ethz.pages.start
2004-01-0525
ethz.notes
.
ethz.identifier.nebis
003911313
ethz.publication.place
New York, NY
ethz.publication.status
published
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02130 - Dep. Maschinenbau und Verfahrenstechnik / Dep. of Mechanical and Process Eng.::02619 - Inst. Dynam. Syst. u. Regelungstechnik / Inst. Dynamic Systems and Control::03286 - Guzzella, Lino / Guzzella, Lino
ethz.leitzahl
03176 - Geering, Hans Peter
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02130 - Dep. Maschinenbau und Verfahrenstechnik / Dep. of Mechanical and Process Eng.::02619 - Inst. Dynam. Syst. u. Regelungstechnik / Inst. Dynamic Systems and Control::03286 - Guzzella, Lino / Guzzella, Lino
ethz.leitzahl.certified
03176 - Geering, Hans Peter
ethz.date.deposited
2017-06-11T16:17:48Z
ethz.source
ECIT
ethz.identifier.importid
imp593652f3cb01218312
ethz.ecitpid
pub:153852
ethz.eth
yes
ethz.availability
Metadata only
ethz.rosetta.installDate
2017-07-13T10:28:37Z
ethz.rosetta.lastUpdated
2019-02-02T06:57:27Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.COinS
ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.atitle=Online%20Estimation%20of%20the%20Oxygen%20Storage%20Level%20of%20a%20Three-Way%20Catalyst&rft.jtitle=SAE%20Technical%20Papers&rft.date=2004&rft.spage=2004-01-0525&rft.issn=0148-7191&0096-5170&rft.au=Auckenthaler,%20Theophil%20S.&Onder,%20Christopher%20H.&Geering,%20Hans%20P.&rft.genre=preprint&
 Search via SFX

Files in this item

FilesSizeFormatOpen in viewer

There are no files associated with this item.

Publication type

Show simple item record