Control system and method for an NOx accumulator
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United States of America Patent
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Mar 28, 2000
Grant Date -
N/A
app pub date -
Dec 22, 1997
filing date -
Dec 20, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention provides the replacing of the known 'macroscopic' processes by a 'microscopic' approach control strategy for an NOx accumulator. The regeneration phases after approximately 30 seconds of a lean operation, which last approximately one second in the state of the art, is replaced by a rich operating cycle after a sequence of lean ones. The number of lean operating cycles which can be carried out before a regenerating operating cycle depends on the combustion process of the internal-combustion engine as well as on the construction and the volume of the catalyst.
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