Desulphating of nitrogen oxide trapping catalyst

Details Desulphating of nitrogen oxide trapping catalyst Desulphating of nitrogen oxide trapping catalyst

2006-10-17

2006-10-17

Denion, Thomas (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

C060S274000, C060S276000, C060S278000, C060S285000, C060S301000

Reexamination Certificate

active

07121086

ABSTRACT:
Sulphur oxides in the exhaust gas of a vehicle engine (1) are trapped by a nitrogen oxide trapping catalyst (5A). A controller (6) calculates the sulphur oxide poisoning amount of the trapping catalyst (5A) from the running condition of the vehicle (S13), and desulphating the sulphur oxides by a removing mechanism (3, 4, 14). The release amount of sulphur oxides per unit time due to desulphating is set as a parameter based on the sulphur oxide poisoning amount (S11), and by integrating the calculated release amount using the parameter, the current poisoning amount is calculated, and the release completion timing is precisely found.

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