Embedded model-based fault diagnosis for on-board diagnosis of engine control systems

In this paper, a model-based fault diagnosis scheme for on-board diagnosis in spark ignition (SI) engine control systems is presented. The developed fault diagnosis system fully makes use of the available control structure and is embedded into the control loops. As a result, the implementation of the diagnosis system is realized with low demands on engineering costs, computational power and memory. The developed diagnosis scheme has been successfully applied to the air intake system of an SI-engine