| 摘要 |
<p>The method involves operating an exhaust aftertreatment system (1) in a combustion engine operated with an air overflow, where the separation of sooty particles from the exhaust gas takes place by a particle filter (5). The ammonia- to mono nitrogen oxide-ratio such as feed ratio is varied phase wise by changing the nitrogen oxide-exhaust gas emission before the catalytic converter or the associated reduction agent quantity, such that the feed ratio phase-wise oscillates between values more than one and values lesser than one. The soot separated on the particle filter or a selective catalytic reduction-catalyst placed on the particle filter, particularly a vanadium oxide containing or zeolite containing Selective catalytic reduction-catalyst is used as catalytic active material. An independent claim is included for an arrangement with an ammonia-storage capacity.</p> |
