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US 8,938,954 B2Granted
Integrated exhaust treatment device having compact configuration
AssigneeDonaldson Company, Inc.
InventorsKorneel De Rudder, Stéphane Le Merdy, Jeffrey Curtis Gillen
Life of this patent
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Abstract
An exhaust treatment device is disclosed. The exhaust treatment device has a compact configuration that includes integrated reactant dosing, reactant mixing and contaminant removal/treatment. The mixing can be achieved at least in part by a swirl structure and contaminant removal can include NOx reduction.
Claims41
An exhaust treatment device comprising:
- an outer housing including opposite first and second end walls and a length that extends between the first and second end walls, the outer housing also including a side wall that extends along the length from the first end wall to the second end wall, the outer housing defining an interior space;
- a divider wall within the interior space of the outer housing, the divider wall being positioned at an intermediate location along the length of the outer housing, the divider wall separating the interior space of the outer housing into a first region and a second region, the first region being defined between the divider wall and the first end wall and the second region being defined between the divider wall and the second end wall;
- a device inlet that is in fluid communication with the first region of the interior space;
- a device outlet that is in fluid communication with the second region of the interior space;
- an exhaust treatment substrate mounted in the second region of the interior space;
- an exhaust treatment and mixing assembly including:
- a swirl chamber positioned adjacent to the first end wall of the outer housing;
- a mixing passage defined by an inner conduit that extends along the length of the outer housing, the mixing passage providing fluid communication between the swirl chamber and the second region of the interior space;
- an exhaust passage that surrounds the inner conduit, the exhaust passage being configured to direct exhaust flow into the swirl chamber;
- a swirl structure for swirling the exhaust flow directed from the exhaust passage into the swirl chamber;
- and
- a dispenser mounting location provided at the first end wall of the outer housing for mounting a dispenser used for dispensing a reactant into the swirl chamber.
9 more elements
An exhaust treatment device comprising:
- an outer housing including opposite first and second end walls and a length that extends between the first and second end walls, the outer housing also including a cylindrical side wall that extends along the length from the first end wall to the second end wall, the cylindrical side wall defining a central longitudinal axis of the outer housing that extends along the length of the outer housing, the outer housing defining an interior space;
- a divider wall within the interior space of the outer housing, the divider wall being positioned at an intermediate location along the length of the outer housing, the divider wall separating the interior space of the outer housing into a first region and a second region, the first region being defined between the divider wall and the first end wall and the second region being defined between the divider wall and the second end wall;
- a device inlet defined through the cylindrical side wall, the device inlet being in fluid communication with the first region of the interior space;
- a device outlet that is in fluid communication with the second region of the interior space;
- a NOx treatment substrate mounted in the second region of the interior space;
- an exhaust treatment and mixing assembly including:
- a swirl chamber positioned adjacent to the first end wall of the outer housing;
- a mixing passage defined by an inner conduit that is co-axially aligned with the central longitudinal axis of the outer housing, the mixing passage extending from the swirl chamber to the divider wall, the mixing passage providing fluid communication between the swirl chamber and the second region of the interior space;
- an annular exhaust passage defined between the inner conduit and an outer conduit that surrounds the inner conduit, the annular exhaust passage being configured to direct exhaust flow into the swirl chamber;
- a first swirl structure for swirling the exhaust flow directed from the annular exhaust passage into the swirl chamber;
- an annular exhaust treatment substrate positioned within the annular exhaust passage for treating the exhaust that flows through the annular exhaust passage;
- and
- a dispenser mounting location provided at the first end wall of the outer housing for mounting a dispenser used for dispensing a reactant into the swirl chamber.
10 more elements
Dependencies are inferred from the claim text.