Multi-tiered telescope shaped atomizer
AssigneeFord Global Technologies, LLC
InventorsRobert Glenwood Hadden, Terry Jadan
Life of this patent
Estimating the term…
Abstract
In one example, a system is provided, comprising an exhaust reductant injector upstream of a mixer. The mixer includes a plurality of concentrically smaller rings interconnected via fins having a width varying in a flow direction, the fins arranged annularly, and with a first set of fins between a first pair of adjacent rings angularly offset from a second set of fins between a second pair of adjacent rings, the first and second pairs of rings sharing one common ring. In this way, it is possible to atomize, redirect, and mix the exhaust flow over a short distance to effectively react with NOx in a downstream SCR catalyst.
Claims20
A system, comprising:
- an exhaust reductant injector upstream of a multi-tiered mixer including:
- a plurality of concentric rings having decreasing diameters in a flow direction and interconnected at ring sidewalls via annularly arranged fins and with a first set of fins between a first pair of adjacent rings angularly offset from a second set of fins between a second pair of adjacent rings, the first and second pairs of rings sharing one common ring.
A system, comprising:
- an exhaust reductant injector upstream of a multi-tiered mixer including:
- a plurality of concentric rings having decreasing diameters in a flow direction and interconnected at ring sidewalls via fins arranged annularly, the fins and rings forming apertures arranged annularly, and with a first set of fins and first set of apertures between a first pair of adjacent rings angularly offset from a second set of fins and a second set of apertures between a second pair of adjacent rings, the first and second pairs of rings sharing one common ring, with alternating fins from the first and second sets connected around a periphery of the common ring.
A system, comprising:
- an exhaust pipe;
- an angled exhaust injector positioned in a wall of the exhaust pipe;
- an SCR catalyst coupled in the exhaust pipe;
- and
- a mixer positioned internally to the exhaust pipe downstream of the injector and upstream of the SCR catalyst, an outer edge of the mixer contiguous and in face-sharing contact with the wall of the exhaust pipe, the mixer including a multi-tiered telescope-shaped set of three or more rings, with progressively smaller diameter rings positioned downstream of one another, adjacent rings connected via peripherally positioned flat angled fins, the fins attached to sidewalls of the adjacent rings, the mixer including apertures formed between adjacent fins in an annular region defined by adjacent rings.
Dependencies are inferred from the claim text.