MIXER FOR AN EXHAUST SYSTEM
First Claim
1. A mixer for an exhaust system of an internal combustion engine for mixing a reactant with an exhaust gas flow, the mixer comprising:
- a pipe section, which borders a flow cross section through which the exhaust gas flow can flow in a circumferential direction, extending in an axial direction from a first axial side of the pipe section to a second axial side of the pipe section;
a plurality of guide blades, which project from the pipe section at least on one of the axial sides such that the plurality of guide blades protrude into the flow cross section, wherein;
the plurality of guide blades are divided into at least a first guide blade group and a second guide blade group, which are arranged offset in the circumferential direction; and
the guide blades of the first guide blade group are arranged axially offset in relation to the guide blades of the second guide blade group.
2 Assignments
0 Petitions
Accused Products
Abstract
An exhaust system mixer (12) mixes a reactant with an exhaust gas flow (3) and includes a pipe section (13), which borders a flow cross section (16), through which the exhaust gas flows (3), in the circumferential direction (17), and which extends in an axial direction (18) from a first axial side (19) to a second axial side (20), and a plurality of guide blades (14, 15), which project from the pipe section (13) at least on one of the axial sides (19, 20), so as to protrude into the flow cross section (16). Guide blades (14, 15) on an axial side, which follow each other in the circumferential direction (17), include a first guide blade group (21), arranged on the respective axial side (19, 20), axially offset in relation to the guide blades (15) of the second guide blade group (22), to reduce a pressure drop.
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Citations
20 Claims
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1. A mixer for an exhaust system of an internal combustion engine for mixing a reactant with an exhaust gas flow, the mixer comprising:
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a pipe section, which borders a flow cross section through which the exhaust gas flow can flow in a circumferential direction, extending in an axial direction from a first axial side of the pipe section to a second axial side of the pipe section; a plurality of guide blades, which project from the pipe section at least on one of the axial sides such that the plurality of guide blades protrude into the flow cross section, wherein; the plurality of guide blades are divided into at least a first guide blade group and a second guide blade group, which are arranged offset in the circumferential direction; and the guide blades of the first guide blade group are arranged axially offset in relation to the guide blades of the second guide blade group. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A reactant feeding device for an exhaust system of an internal combustion engine, the reactant feeding device comprising:
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a pipe arrangement for guiding an exhaust gas flow; an injector arranged at the pipe arrangement for generating a spray jet from reactant for introduction of the reactant into the exhaust gas flow; and a mixer arranged in the pipe arrangement downstream of the injector in relation of the exhaust gas flow, the mixer comprising; a pipe section, which borders a flow cross section through which the exhaust gas flow can flow in a circumferential direction, extending in an axial direction from a first axial side of the pipe section to a second axial side of the pipe section; a plurality of guide blades, which project from the pipe section at least on one of the axial sides such that the plurality of guide blades protrude into the flow cross section, wherein; the plurality of guide blades are divided into at least a first guide blade group and a second guide blade group, which are arranged offset in the circumferential direction; and the guide blades of the first guide blade group are arranged axially offset in relation to the guide blades of the second guide blade group. - View Dependent Claims (15, 16, 17)
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18. An exhaust system for an internal combustion engine, the exhaust system comprising:
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an SCR catalytic converter; and a reactant feeding device arranged upstream of the SCR catalytic converter, the reactant feeding device comprising; a pipe arrangement for guiding an exhaust gas flow; an injector arranged at the pipe arrangement for generating a spray jet from reactant for introduction of the reactant into the exhaust gas flow; and a mixer arranged in the pipe arrangement downstream of the injector in relation of the exhaust gas flow, the mixer comprising; a pipe section, which borders a flow cross section through which the exhaust gas flow can flow in a circumferential direction, extending in an axial direction from a first axial side of the pipe section to a second axial side of the pipe section; a plurality of guide blades, which project from the pipe section at least on one of the axial sides such that the plurality of guide blades protrude into the flow cross section, wherein; the plurality of guide blades are divided into at least a first guide blade group and a second guide blade group, which are arranged offset in the circumferential direction; and the guide blades of the first guide blade group are arranged axially offset in relation to the guide blades of the second guide blade group. - View Dependent Claims (19, 20)
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Specification