Mixer for an exhaust gas duct system of an internal combustion engine

Abstract

A mixer for an exhaust gas duct system of an internal combustion engine includes a flow channel element (16) with a flow channel (14), through which exhaust gases can flow in a main direction of flow (S). At least one mixer element (12) in the flow channel element (16) is movable in the flow channel element (16) to change a mixing effect.

Description

technical field [0001] The invention relates to a mixing device for an exhaust gas guidance system of an internal combustion engine. Exhaust gas guidance systems of this type generally comprise flow channels in the flow channel element through which exhaust gas can flow in the main flow direction. Such a flow channel can lead from an internal combustion engine, for example a diesel internal combustion engine, to the catalytic converter device and thus further to the surroundings. Background technique [0002] In order to be able to meet ever more stringent requirements regarding the emission of pollutants from internal combustion engines, in particular diesel internal combustion engines, it is known to introduce additives, such as urea, into the exhaust gas flow downstream of the internal combustion engine. In order to achieve the greatest possible effect, this additive needs to be mixed efficiently with the exhaust gas. The problem here, however, is that the integration o...

AI Technical Summary

Problems solved by technology

But the problem here is that the integration of mixing elements into the exhaust gas flow increases the exhaust gas counterpressure due to the flow resistance created by such mixing elements, which leads to a reduction in the power of the internal combustion engine

Images