Model Based Diagnosis for the Air Intake System of the SI-Engine
Because of legislative regulations like OBDII, on-board diagnosis has
gained much interest lately.
A model based approach is suggested for the diagnosis of the air intake system of
an SI-engine. Important research issues are modeling
concepts, residual generation
and evaluation, overall performance, and limiting factors. The
diagnosis system is based on a non-linear
semi-physical model and uses a combination of different residual
generation methods. It is capable of
detecting and isolating faults
in the throttle actuator, throttle sensor, air mass flow sensor and manifold
pressure sensor. The scheme is experimentally validated on a real
production engine.
Mattias Nyberg and Lars Nielsen
SAE Paper,
1997
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