Exhaust emission control system of internal combustion engine
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United States of America Patent
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-
Oct 21, 2003
Grant Date -
Oct 31, 2002
app pub date -
Mar 27, 2002
filing date -
Mar 27, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An exhaust emission control system of an internal combustion engine is provided which controls the oxygen concentration of exhaust passing through the exhaust emission control device according to the flow rate of exhaust flowing through an exhaust passage when the exhaust emission control device is regenerated, so that the regeneration is completed within a short period of time while the filter is prevented from being damaged by melting during the regeneration. This improves the exhaust emission control performance and reliability of the filter.
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