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Model based diagnosis of the air path of an automotive diesel engine
Linköping University, Faculty of Arts and Sciences. Linköping University, The Tema Institute.
DaimlerChrysler AG, Research and Technology (REM/EP), Stuttgart D-70546, Germany.
2004 (English)In: Control Engineering Practice, ISSN 0967-0661, Vol. 12, no 5, 513-525 p.Article in journal (Refereed) Published
Abstract [en]

A model based diagnosis system for the air-path of a turbo-charged diesel engine with EGR is constructed. The faults considered are air mass-flow sensor fault, intake-manifold pressure sensor fault, air-leakage, and the EGR-valve stuck in closed position. A non-linear engine model, with four states, is constructed. The diagnosis system is then constructed in the framework of structured hypothesis tests and by using observers estimating unknown fault-parameters. To handle modeling errors a new method for adaptive thresholds is proposed. The diagnosis system is successfully evaluated in a real car driving on the road. © 2003 Elsevier Ltd. All rights reserved.

Place, publisher, year, edition, pages
2004. Vol. 12, no 5, 513-525 p.
Keyword [en]
Adaptive observers, Adaptive thresholds, Diagnosis, Diesel engine, Extended Kalman filter, Fault detection, Hypothesis testing, Modeling, On-board diagnostics
National Category
Social Sciences
URN: urn:nbn:se:liu:diva-45761DOI: 10.1016/S0967-0661(03)00120-5OAI: diva2:266657
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2011-01-12

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Nyborg, Marta
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Faculty of Arts and SciencesThe Tema Institute
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