Method for desulfating an NOx accumulator catalytic converter
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United States of America Patent
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-
Mar 11, 2003
Grant Date -
Nov 15, 2001
app pub date -
Dec 18, 2000
filing date -
Jun 18, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An NO.sub.x accumulator catalytic converter for an internal combustion engine is desulfonated by providing a plurality of intermittent rich/lean operating cycles of the engine wherein rich operation is at a lambda of less than 0.985, and wherein the duration of rich mixture operation is limited to reduce hydrogen sulfide emission.
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