ON-BOARD VEHICLE DIAGNOSTIC OF AN OXIDATION CATALYST
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United States of America Patent
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Issued Date -
Dec 8, 2011
app pub date -
Feb 5, 2010
filing date -
Feb 5, 2009
priority date (Note) -
Abandoned
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Abstract
There is presented a method for monitoring an oxidation catalyst in an exhaust line of an internal combustion engine, wherein a catalyst diagnostic event comprises a test cycle during which a conversion capability of the oxidation catalyst is determined based on the exotherm generated by post-injection of fuel. The diagnostic event may only be initiated when the temperature of the oxidation catalyst lies within a predetermined temperature range.
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