Method of protecting NOx storage catalyst during desulfurization

The invention relates to an exhaust gas aftertreatment method (200) for denitrifying an exhaust gas stream (102) from an internal combustion engine (240), in particular of a motor vehicle, wherein ina first operating mode (210) for denitrogenation of the exhaust gas stream (102), an exhaust stream (...

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Main Authors CHRISTIAN NEDERLOF, FELIX GOEBEL, EVGENY SMIRNOV, CHRISTOPH BOERENSEN, MARIA ARMIENTO, DIRK ROEMER, BRENDAN PATRICK CARBERRY
Format Patent
LanguageChinese
English
Published 28.07.2020
Subjects
BLASTING
ENGINE PLANTS IN GENERAL
GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES
GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL
HEATING
LIGHTING
MACHINES OR ENGINES IN GENERAL
MECHANICAL ENGINEERING
STEAM ENGINES
WEAPONS
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Summary:The invention relates to an exhaust gas aftertreatment method (200) for denitrifying an exhaust gas stream (102) from an internal combustion engine (240), in particular of a motor vehicle, wherein ina first operating mode (210) for denitrogenation of the exhaust gas stream (102), an exhaust stream (102) from the internal combustion engine (240) is supplied to the exhaust aftertreatment system (100), along a main exhaust line (101) of the exhaust aftertreatment system (100), the exhaust gas first passes through the first storage catalyst (110) and then passes through the second storage catalyst (120) arranged downstream of the first storage catalyst (110) in the exhaust gas flow direction (S). The invention is characterized in that, in a second operating mode (220) for desulfurization of the exhaust aftertreatment system (100), the exhaust gas stream (102) passes through the first storage catalyst (110) and then is branched and/or diverted such that the exhaust gas stream (102) does not pass through the second
Bibliography:Application Number: CN202010052360