Exhaust gas aftertreatment installation and method

An installation for aftertreatment of exhaust gas generated by a diesel engine of a motor vehicle, said installation comprising:

• a nitrogen oxide storage catalytic converter configured for temporarily storing nitrogen oxides contained in the exhaust gas during adsorption operating phases with a lean exhaust gas air ratio and for releasing and reducing stored nitrogen oxides during regeneration operating phases with a rich exhaust gas air ratio, wherein the nitrogen oxide storage catalytic converter is configured to generate ammonia by reducing stored nitrogen oxides during the regeneration operating phases;
• a particulate filter arranged upstream of the nitrogen oxide storage catalytic converter;
• a first oxidation catalytic converter arranged as a first exhaust gas aftertreatment component, as seen in a direction of flow of the exhaust gas;
• a second oxidation catalytic converter arranged downstream of the nitrogen oxide storage catalytic converter, said second oxidation catalytic converter having a lower precious metal loading than the first oxidation catalytic converter;
• a reducing agent supplying device configured to feed fuel into the exhaust gas stream, as a reducing agent, wherein said reducing agent supplying device is configured to feed fuel into the exhaust gas stream upstream of the particulate filter;
• and
• an SCR catalytic converter arranged between the nitrogen oxide storage catalytic converter and the second oxidation catalytic converter.