Static mixer for an exhaust gas system of an internal combustion engine

摘要

A static mixer for an exhaust gas system of an internal combustion engine with which at least two different fluid streams are mixed almost homogeneously after a short mixing distance, and with which back-flow effects and pressure losses are avoided, to the greatest possible extent. Due to the placement of flow guide devices, the inclined front sections of which are disposed alternately facing in different directions, and by the configuration and placement of the fluid passage spaces, which are delimited by guide elements, intensive and homogeneous mixing of two different fluid streams is achieved, while avoiding turbulent flows and pressure losses. Mixing of the fluid streams is supported by guide vanes that are disposed on the flow guide elements in the front region of the central center element, and on a frame that delimits the inclined sections of the flow guide elements.

主权项

1. A static mixer for an exhaust gas system of an internal combustion engine which is adapted to be disposed in an exhaust gas pipe of the internal combustion engine, comprising:
a center element; a plurality of flow guide elements that influence the flow of a fluid stream when said mixer is placed in the fluid stream, said flow guide elements being disposed on the center element extending outwardly from the center element, each of said flow guide elements having a section that when viewed in a flow direction of the fluid stream is disposed inclined at a predetermined angle relative to a longitudinal axis of the flow guide elements, and each of said sections being disposed alternately facing in different directions so that a free flow cross-section between two adjacent flow guide elements having sections that face each other is reduced, and the free flow cross-section between two adjacent flow guide elements having sections that face away from each other is maintained;
a frame element disposed on a front of each of the sections, when viewed opposite the flow direction of the fluid stream; andguide elements facing toward the center element and connected with the center element, said guide elements being disposed on the frame elements so that a free fluid passage space is formed by two of said guide elements that are connected with their longitudinal sides and that face in the direction of the center element.