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  • 01-Feb-2012 08:08 EST

Plug-In Charging Systems Monitoring

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Plug In Charging Systems are mainly responsible for transferring energy from the electric power grid into one or more vehicle energy storage devices (e.g. batteries). A satisfactorily operating Plug in Charging System has the following three key performance characteristics. First, the charge process starts up easily. Second, it completes the charge process within some expected time. Third, it charges efficiently so that excessive amounts of power are not wasted. When a Plug In Charging System malfunction exists and negatively affects one or more of these key performance criteria, it is the responsibility of the OBD monitoring system to identify the fault and notify the customer. The presentation will discuss the key performance characteristics described above and some of the diagnostic strategies used to detect faults. The discussion will also include an overview of MIL illumination and freeze frame storage capabilities. The intent of the presentation will be to determine if any updates to On Board Diagnostics regulations are needed or if the existing regulations should be considered adequate as they are currently written.

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Daniel Grenn, GM Powertrain

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