Power plants – Internal combustion engine with treatment or handling of... – Methods
Reexamination Certificate
2011-04-05
2011-04-05
Nguyen, Tu M (Department: 3748)
Power plants
Internal combustion engine with treatment or handling of...
Methods
C060S285000, C060S286000, C060S295000, C060S297000, C060S303000
Reexamination Certificate
active
07918082
ABSTRACT:
A method is intended for desulfation of a nitric oxide trap (22) and regeneration of a particle filter (24) arranged in an exhaust line (20) for treating exhaust gas from an internal-combustion engine (10), notably a Diesel engine. The saturation rate of the trap and the clogging rate of the filter are evaluated and, as soon as one of the rates reaches a threshold value, the fuel/air ratio of the exhaust gas is increased without it reaching a fuel/air ratio of 1, then desulfation of trap (22) is performed in association with regeneration of particle filter (24).
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Castagne Michel
Dementhon Jean-Baptiste
Noirot Remi
Antonelli, Terry Stout & Kraus, LLP.
Institut Francais du Pe'trole
Nguyen Tu M
Peugeot Citroen Automobiles SA, PCA SA
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