Overall Monitoring and Diagnosis for Hybrid Vehicle Powertrains
Designing diagnosis systems for hybrid vehicles include new features
compared to conventional vehicles, e.g. mode switches in the system.
The influence of this on the performance of the diagnosis system is
investigated by design and implementation of diagnosis systems on
vehicle level. The diagnosis systems are based on two sensor
configurations, one consisting of many sensors and one of few
sensors. The diagnosis systems detect specific faults, here
specifically faults in the electrical components in a hybrid vehicle
driveline, but the methodology is generic. There is a connection
between the design of the energy management and the diagnosis
system, and this interplay is of special relevance when models of
components are valid only in some operating modes. In the systems
implemented, the diagnosis system based on few sensors is more
complex and includes a larger part of the vehicle model than the
system based on more sensors.
Christofer Sundström, Erik Frisk and Lars Nielsen
2010
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