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Diagnosis of Evaporative Leaks and Sensor Faults in a Vehicle Fuel System
Fordonssystem Department of Electrical Engineering, Linköpings universitet.
Linköpings universitet, Tekniska högskolan. Linköpings universitet, Institutionen för systemteknik, Fordonssystem.
2001 (engelsk)Inngår i: IFAC Workshop: Advances in Automotive Control,2001, 2001, s. 629-634Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

This paper describes a vacuum-decay based evaporative leak detection procedure for vehicle fuel systems. A physical model for an evaporative system is proposed containing parts for fuel evaporation, leakage flow and canister flow. Two methods for detecting evaporative leakages based on the model is presented. Both methods can detect a 0.5 mm diameter leakage in a laboratory environment. Keywords: purge system, fault diagnosis, fault detection, model based diagnosis 1. INTRODUCTION According to regulations for emissions from vehicles, fuel vapor leakage from the fuel tank must be detected. Fuel vapor is always generated in the fuel tank, the amount depends on ambient conditions like temperature and movement of the tank. Filling fuel also causes extra vapor to be generated. The fuel vapor may cause an over pressure that may push vapor out of the tank. Also, as fuel is consumed an under-pressure develops in the tank and it is required to level the fuel-tank gas pressure with ambi.

sted, utgiver, år, opplag, sider
2001. s. 629-634
HSV kategori
Identifikatorer
URN: urn:nbn:se:liu:diva-39495Lokal ID: 49047OAI: oai:DiVA.org:liu-39495DiVA, id: diva2:260344
Konferanse
3rd IFAC Workshop Advances in Automotive Control, 28-30 March 2001, Karlsruhe, Germany
Tilgjengelig fra: 2009-10-10 Laget: 2009-10-10 Sist oppdatert: 2015-07-21

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http://www.fs.isy.liu.se/Publications/Articles/AAC_01_IAEF.pdf

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