Diagnostic system for monitoring catalyst performance

Details Diagnostic system for monitoring catalyst performance Diagnostic system for monitoring catalyst performance

2005-08-23

2005-08-23

Soderquist, Arlen (Department: 1743)

Chemistry: analytical and immunological testing

Testing of catalyst

C060S276000, C422S083000, C422S090000, C422S094000, C422S098000, C436S116000, C436S118000, C436S119000, C436S122000, C436S127000, C436S137000, C436S149000, C436S151000

Reexamination Certificate

active

06933151

ABSTRACT:
A diagnostic system for monitoring catalyst performance in an exhaust system comprises a plurality of treatment devices catalytically treating an exhaust gas stream, and a plurality of gas sensors for monitoring the catalyst performance of the treatment devices to determine when sulfur poisoning occurs. An on-board diagnostic system receives signals from the gas sensors, and, based upon response time differentials between sensors, determines whether the treatment devices are experiencing sulfur poisoning.

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