VORRICHTUNG ZUR REINIGUNG VON DIESELABGASEN

摘要

A device comprises an oxidation catalyst, a diesel particulate filter having a catalytically active coating, and downstream metering device for a reducing agent from an external reducing agent source. A selective catalytic reduction (SCR) catalytic converter is also included. The oxidation catalyst and the catalytic active coating of the diesel particle filter comprise palladium and platinum. Ratio of the total quantity of palladium to total quantity of platinum is in between 8:1 and 1:15, where the ratio of platinum and palladium in the oxidation catalyst is not more than 6:1. The device comprises an oxidation catalyst, a diesel particulate filter having a catalytically active coating, and downstream metering device for a reducing agent from an external reducing agent source. A selective catalytic reduction (SCR) catalytic converter is also included. The oxidation catalyst and the catalytic active coating of the diesel particle filter comprise palladium and platinum. Ratio of the total quantity of palladium to total quantity of platinum is in between 8:1 and 1:15, where the ratio of platinum and palladium in the oxidation catalyst is not more than 6:1. The ratio of platinum and palladium in the catalytic active coating of the diesel particle filter is not less than 10:1.