Control system and method for an NOx accumulator

Details Control system and method for an NOx accumulator Control system and method for an NOx accumulator

1997-12-22

2000-03-28

Denion, Thomas

Power plants

Internal combustion engine with treatment or handling of...

Methods

60295, 60297, 60285, 60286, F01N 300

Patent

active

060415924

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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