In the future, the development of engines does not only mean to increase their efficiency. Connected with this, the fuel consumption as well as the exhaust emissions must be reduced. The reason for that is primarily the restrictive exhaust legislation which was introduced in almost all fields of vehicle, machinery and equipment. In order to meet future stricter emission regulations comprehensive in-cylinder measures alone would not be sufficient. An effective exhaust aftertreatment is necessary to meet the limits required by law. Particularly, the drastic reduction of NO_X and particle emissions of diesel engines is a big challenge. However, the team of the Argomotive GmbH is acquainted with these requirements. We possess practical knowledge of many years in the development, testing and evaluation of exhaust aftertreatment technologies for passenger cars, commercial vehicles and off- and non-road diesel engines including: