Static mixer and exhaust gas treatment device
AssigneeJ. Eberspaecher GmbH & Co. KG
InventorsGeorg Wirth, Felix Neumann
Life of this patent
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Abstract
The invention relates to a static mixer for an exhaust system of an internal combustion engine. The mixer has a wall structure that is arranged across the directional of flow in a pipe and has several layers of a corrugated sheeting material laying across one another in the direction of flow. The cells through which the flow can pass in the direction of flow are provided between the sheeting material of neighboring layers. The sheeting material has baffles for all or several of the cells. The baffles are arranged on the sheeting material so that they are arranged on their outgoing flow side in the case of said cells and extend in the direction of flow and across it.
Claims25
A static mixer for an exhaust system of an internal combustion engine, comprising:
- a wall structure arranged across the direction of flow in a pipe;
- a plurality of layers of a corrugated sheeting material situated one above the other in said wall structure;
- wherein said plurality of layers form a plurality of cells through which cells an exhaust flow passes;
- and a plurality of baffles arranged along the sheeting material and comprising baffle pairs, each baffle pair comprising a first and a second baffle, wherein for each said baffle pair, the first baffle is arranged at a distance of one half-wavelength relative to the second baffle, and wherein the second baffle of a first baffle pair is arranged at a distance of three half-wavelengths from the first baffle of a second baffle pair, and wherein at least one of said plurality of baffles is associated with at least one of said plurality of the cells, said at least one baffle being arranged on at least a first of said plurality of layers of sheeting material in such a way that it is arranged on the outgoing flow side of said cells and extends across the direction of flow.
A static mixer for an exhaust system of an internal combustion engine, comprising:
- a wall structure arranged across the direction of flow in a pipe;
- a plurality of layers of a corrugated sheeting material situated one above the other in said wall structure;
- wherein said plurality of layers form a plurality of cells through which cells an exhaust flow passes;
- at least one baffle associated with at least one of said plurality of the cells, said at least one baffle being arranged on at least a first of said plurality of layers of sheeting material in such a way that it is arranged on the outgoing flow side of said cells and extends across the direction of flow, wherein said first of said plurality of layers with baffles and at least a second of said plurality of layers without baffles are alternately opposite one another within said wall structure.
An exhaust gas treatment device for an exhaust system of an internal combustion engine, comprising at least one exhaust gas treatment insert that is arranged in a tubular body of the exhaust gas treatment device;
- a mixer arranged in said tubular body upstream from said exhaust gas treatment insert, said tubular body of the exhaust gas treatment device forming a pipe;
- and an injection device for introducing a liquid upstream from the mixer, wherein said mixer comprises:
- a wall structure arranged across the direction of flow in the pipe;
- a plurality of layers of a corrugated sheeting material situated one above the other in said wall structure;
- wherein said plurality of layers form a plurality of cells through which cells an exhaust flow passes;
- and at least one baffle associated with at least one of said plurality of the cells, said at least one baffle being arranged on at least a first of said plurality of layers of sheeting material in such a way that it is arranged on the outgoing flow side of said cells and extends across the direction of flow, wherein a first of said plurality of layers with baffles and at least a second of said plurality of layers without baffles are alternately opposite one another within said wall structure.
Dependencies are inferred from the claim text.