Exhaust after-treatment device for a motor vehicle with a catalytic converter, which has at least one SCR material and at least one NOx storage material, and method for operating such an exhaust gas aftertreatment device

摘要

The invention relates to an exhaust gas aftertreatment device (10) for a motor vehicle, comprising at least one catalytic converter (18) through which exhaust gas from an internal combustion engine (12) of the motor vehicle flows, which catalyst comprises at least one SCR material for catalyzing a selective catalytic reduction for reducing nitrogen oxides contained in the exhaust gas at least one NO _x storage material for at least temporarily storing nitrogen oxides contained in the exhaust gas, and with an upstream of the catalyst (18) arranged feed device (24), by means of which a reducing agent, by means of which in the exhaust gas contained nitrogen oxides in the selective catalytic reduction are reducible, can be introduced into the exhaust gas, wherein the catalyst (18) is free of platinum metals.