Method for monitoring an oxidation catalysis device
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United States of America Patent
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Jun 5, 2018
Issued Date -
Jun 16, 2016
app pub date -
Dec 14, 2015
filing date -
Dec 15, 2014
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Abstract
A method for monitoring an oxidation catalysis device or DOC arranged in an exhaust line of an internal combustion engine of a vehicle, in a predetermined range of inlet (2) and outlet (3) temperatures of the DOC, includes injecting predetermined successive quantities of fuel in stages (5, 6) into the inlet of the DOC, recording the outlet (3) temperature of the DOC after each injected quantity of fuel, recording the total quantity injected for a given stage, for which the outlet temperature (3) of the DOC begins to decrease, determining a characterization of the DOC monitored, then comparing this characterization with a test characterization of a similar DOC which has been established beforehand in order to determine a threshold degradation of the DOC monitored that is not to be exceeded.
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