Method and apparatus for reducing nitrogen oxide and ammonia emissions in an exhaust aftertreatment system of an internal combustion engine during load changing
A technology of nitrogen oxides and internal combustion engines, applied in the electronic control of exhaust treatment devices, diagnostic devices of exhaust treatment devices, exhaust treatment, etc., can solve problems that have not been described, to avoid ammonia slippage and reduce nitrogen The effect of oxide emissions
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[0029] figure 1 By way of example, a technical environment is shown in which the method according to the invention can be used. In this case, the illustrations are limited to the components necessary for the explanation of the invention. An internal combustion engine 1 designed as a diesel engine is shown as an example, comprising a motor block 10 and an exhaust duct 30 in which an exhaust gas flow 20 is guided. The exhaust tract 30 has an exhaust gas purification device which, in the example shown, firstly has a diesel oxidation catalyst 40 as a catalytically coated component arranged in the flow direction of the exhaust gas. (DOC) and Diesel Particulate Filter 50 (DPF). Followed by an SCR catalyst 80 , upstream of which a reducing agent can be introduced by means of a metering unit 110 for reducing nitrogen oxides in the exhaust gas flow. To monitor the nitrogen oxide concentration in the exhaust gas, an exhaust gas sensor 90 designed as a nitrogen oxide sensor is inserte...
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