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Design and Evaluation of an Automatically Generated Diagnosis System
Linköping University, Department of Electrical Engineering.
Linköping University, Department of Electrical Engineering.
2006 (English)Independent thesis Basic level (professional degree), 20 credits / 30 HE creditsStudent thesisAlternative title
Konstruktion och utv¨ardering av ett automatgenererat diagnossystem (Swedish)
Abstract [en]

Throughout recent years, legislations concerning emission levels for vehicles have become more restrictive and will be even more restrictive in the future. In the recent European environmental standards, EURO 4 (2006) and EURO 5 (2008), further requirements have been added on top of low emission demands. All heavy duty trucks have to be equipped with an OBD-system. Scania CV AB has today an existing OBD-system that consists of several tests. Typically, a test is designed to check if a signal is inside specified limits or thresholds. To improve the system, Scania CV AB and Vehicular Systems at Linköping University have developed a method to design diagnosis systems in an automatic way, implemented in a toolbox called DSAME.

In this thesis, an automatic designed OBD-system has been created with DSAME and the corresponding parts in a manually designed OBD-system have been identified. The two systems have been compared. The result shows that both systems are equally at detecting faults but the automatic designed OBD-system is a lot better to isolate the faults than the existing OBD-system.

Place, publisher, year, edition, pages
Institutionen för systemteknik , 2006. , 59 p.
Keyword [en]
Model based diagnosis, Diagnosis performance, Evaluation
National Category
Engineering and Technology
URN: urn:nbn:se:liu:diva-8029ISRN: LiTH-ISY-EX-- 06/3889 -- SEOAI: diva2:22917
Subject / course
Vehicular Systems
2006-12-14, Algoritmen, B-huset, Linköpings universitet, Linköping, 13:15
Available from: 2007-01-11 Created: 2007-01-11 Last updated: 2012-04-24Bibliographically approved

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