Normalizing oxygen storage capacity(OSC) for catalyst monitoring
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United States of America Patent
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Apr 3, 2012
Grant Date -
Sep 25, 2008
app pub date -
Mar 20, 2007
filing date -
Mar 20, 2007
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Abstract
An oxygen storage capacity (OSC) monitoring system for a vehicle having a catalytic converter includes a control module that determines a measured OSC based on an inlet sensor signal (ISS) that is responsive to an oxygen content of exhaust flowing into the catalytic converter. The control module determines a normalization ratio based the measured OSC and determines a PASS/FAIL status of the catalytic converter based on the normalization ratio.
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