Exhaust gas aftertreatment system

An exhaust gas aftertreatment system comprising at least a first route and a second route arranged in parallel in an exhaust gas stream, wherein the first route and the second route are provided with exhaust gas aftertreatment subsystems,

• wherein
• a piping of the first route has a larger sectional area than a piping of the second route,
• the exhaust gas aftertreatment subsystems of the first route and the second route use different exhaust gas aftertreatment technologies,
• the first route is provided with a SCR catalyst and the second route is provided with a diesel oxidation catalyst, and
• the first route is not provided with a diesel oxidation catalyst and the second route is not provided with a SCR catalyst, and
• further wherein
• the exhaust gas aftertreatment system further comprises a first valve or flap for controlling the exhaust gas stream through the first route, wherein the first valve or flap is arranged downstream of the exhaust gas aftertreatment subsystem of the first route, and
• the exhaust gas aftertreatment system further comprises a second valve or flap for controlling the exhaust gas stream through the second route, wherein the second valve or flap is arranged downstream of the exhaust gas aftertreatment subsystem of the second route.