Abstract: An exhaust gas treatment device includes an exhaust gas guide element which has an exhaust gas conduit. A first flow separation element is disposed in the exhaust gas conduit that divides the exhaust gas conduit into a first partial conduit and a second partial conduit. The first flow separation element has a first conduit area. A second flow separation element is disposed in the second partial conduit. The second flow separation element divides the second partial conduit into a first sub-conduit, a second sub-conduit, and a third sub-conduit. The second flow separation element has a second conduit area which is cylindrical or expands in a flow direction. The first conduit area of the first flow separation element expands along an injection direction of a reductant.

Abstract: A mixing device of an exhaust gas purification system of an internal combustion engine is disclosed. The mixing device includes swirl tube, a mixing tube arranged in the swirl tube, and an exhaust gas supply tube leading into the swirl tube such that exhaust gas can enter the swirl tube tangentially from the exhaust gas supply tube through a cut-out opening in the lateral surface of the swirl tube and forms a flow rotating around the mixing tube. The exhaust gas completely enters the mixing tube and leaves the interior of the swirl tube completely through the mixing tube. A metering device can spray urea solution into the swirl tube such that the urea solution enters the mixing tube and is entrained by the rotating flow of the exhaust gas and is discharged from the swirl tube through the mixing tube together with the exhaust gas.

Abstract: A mixing device of an exhaust gas purification system of an internal combustion engine is disclosed. The mixing device includes swirl tube, a mixing tube arranged in the swirl tube, and an exhaust gas supply tube leading into the swirl tube such that exhaust gas can enter the swirl tube tangentially from the exhaust gas supply tube through a cut-out opening in the lateral surface of the swirl tube and forms a flow rotating around the mixing tube. The exhaust gas completely enters the mixing tube and leaves the interior of the swirl tube completely through the mixing tube. A metering device can spray urea solution into the swirl tube such that the urea solution enters the mixing tube and is entrained by the rotating flow of the exhaust gas and is discharged from the swirl tube through the mixing tube together with the exhaust gas.

Abstract: A system for adding and processing reducing agent includes an injector connected to a reducing agent metering unit and which can spray a jet of reducing agent into the exhaust gas. A mixing pipe is disposed in an exhaust pipe of the internal combustion engine and a funnel element is disposed on or in the mixing pipe in the region of the first mixing pipe end. The mixing pipe and the funnel element are formed as hollow bodies having perforated outer surfaces, the perforation of the mixing pipe has a larger surface area than the perforation of the funnel element. The funnel element has a passage opening on the end of the funnel element assigned to the first mixing pipe end, and the reducing agent metering unit is disposed such that the injector sprays the jet of reducing agent through the passage opening into the interior of the funnel element.

Abstract: A system for adding and processing reducing agent includes an injector connected to a reducing agent metering unit and which can spray a jet of reducing agent into the exhaust gas. A mixing pipe is disposed in an exhaust pipe of the internal combustion engine and a funnel element is disposed on or in the mixing pipe in the region of the first mixing pipe end. The mixing pipe and the funnel element are formed as hollow bodies having perforated outer surfaces, the perforation of the mixing pipe has a larger surface area than the perforation of the funnel element. The funnel element has a passage opening on the end of the funnel element assigned to the first mixing pipe end, and the reducing agent metering unit is disposed such that the injector sprays the jet of reducing agent through the passage opening into the interior of the funnel element.