Linköping University

Abstract

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Diagnosis of Evaporative Leaks and Sensor Faults in a Vehicle Fuel System

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.

Ingemar Andersson and Erik Frisk

IFAC Workshop: Advances in Automotive Control, 2001

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