Exhaust gas aftertreatment device with injection section

An exhaust gas aftertreatment device for an exhaust system of an internal combustion engine, the exhaust gas aftertreatment device comprising:

• a tubular housing for conducting an exhaust gas flow, the tubular housing having an outlet section that contains an SCR-catalytic converter;
• and
• an injection section comprising a channel for conducting an exhaust gas flow, an injector connection arranged laterally on the channel, on which an injector for introducing a fluid into the exhaust gas flow can be connected and an injection chamber formed in the channel in a region of the injector connection, the injection chamber being delimited by a perforated first separating wall through which exhaust gas can flow and which, with respect to the exhaust gas flow, is arranged in the channel upstream of the injector connection and being delimited by a perforated second separating wall through which exhaust gas can flow and which, with respect to the exhaust gas flow, is arranged in the channel downstream of the injector connection, wherein:
• the first separating wall comprises a perforation configuration to provide a predominantly or exclusively eccentric exhaust gas flow through the first separating wall, with respect to a longitudinal center axis of the channel, whereby an entering main part of the exhaust gas flow eccentrically enters the injection chamber;
• the second separating wall comprises a perforation configuration to provide a predominantly or exclusively concentric exhaust gas flow through the second separating wall, with respect to a longitudinal center axis of the channel, whereby an exiting main part of the exhaust gas flow concentrically exits the injection chamber;
• and
• the injection section, with respect to the exhaust gas flow, is arranged upstream of the SCR-catalytic converter.