Process for regenerating a nitrogen oxide storage catalyst

B - Operations – Transporting – 01 – D

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

B01D 53/96 (2006.01) B01D 53/94 (2006.01) B01J 38/14 (2006.01) F01N 3/08 (2006.01) F02D 41/02 (2006.01)

Patent

CA 2435324

The present invention provides a process and a device for regeneration of a nitrogen oxide storage catalyst in the exhaust system of a diesel engine. The process comprises a first and a second regeneration strategy. The first regeneration strategy is applied when the exhaust gas temperature is above a threshold value and comprises changing the air/fuel-ratio from a lean to a rich value during a first regeneration period. The second regeneration strategy is applied when the exhaust gas temperature is below a threshold value and comprises switching the air/fuel-ratio back and forth between lean and rich air/fuel-ratios, forming a sequence of between 2 and 10 rich pulses and between 2 and 10 lean pulses during a second regeneration period.

La présente invention fournit un procédé et un dispositif permettant de régénérer un catalyseur de stockage d'oxyde d'azote dans le système d'échappement d'un moteur diesel. Le procédé comprend une première et une seconde stratégie de régénération. La première est employée lorsque la température des gaz d'échappement est supérieure à une valeur-seuil et consiste à modifier le ratio air-carburant pour l'enrichir pendant une première période de régénération. La seconde stratégie est appliquée lorsque la température des gaz d'échappement est inférieure à une valeur-seuil et consiste à faire alterner le ratio air-carburant entre un rapport pauvre et un rapport riche, dans une séquence de 2 à 10 impulsions d'enrichissement et 2 à 10 impulsions d'appauvrissement pendant une seconde période de régénération.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Process for regenerating a nitrogen oxide storage catalyst does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for regenerating a nitrogen oxide storage catalyst, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for regenerating a nitrogen oxide storage catalyst will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1710704

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.