Exhaust gas additive/treatment system and mixer for use therein
First Claim
Patent Images
1. An exhaust mixer for use in an engine exhaust system downstream from an additive injector, the mixer comprising:
- a first disc-shaped wall structure with a plurality of flow openings formed therein; and
a second wall structure carrying a set of mixer vanes, the second wall structure having a cone shape extending radially outwardly from and intersecting the first wall structure such that the first wall structure truncates the cone shape.
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Abstract
An exhaust mixer (16) is provided for use in an engine exhaust system (10) downstream from an additive injector (14). The mixer (16) includes a first wall structure (20), and a second wall structure (22) carrying a set of mixer vanes (30), the second wall structure (22) being cone shaped and extending radially outwardly from the first wall structure (20).
94 Citations
17 Claims
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1. An exhaust mixer for use in an engine exhaust system downstream from an additive injector, the mixer comprising:
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a first disc-shaped wall structure with a plurality of flow openings formed therein; and a second wall structure carrying a set of mixer vanes, the second wall structure having a cone shape extending radially outwardly from and intersecting the first wall structure such that the first wall structure truncates the cone shape. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An exhaust mixer for use in an engine exhaust system downstream from an additive injector, the mixer comprising:
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a first disc-shaped wall structure with a plurality of flow openings formed therein; a second wall structure carrying a set of mixer vanes, the second wall structure being cone shaped and extending radially outwardly from of the first wall structure; and wherein the vanes of the set are perforate.
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8. An exhaust mixer for use in an engine exhaust system downstream from an additive injector, the mixer comprising:
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a first disc-shaped wall structure with a plurality of flow openings formed therein; a second wall structure carrying a set of mixer vanes, the second wall structure being cone shaped and extending radially outwardly from of the first wall structure; and wherein the first wall structure carries an inner set of mixer vanes. - View Dependent Claims (9, 10)
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11. An exhaust mixer for use in an engine exhaust system downstream from an additive injector, the mixer comprising:
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a first set of mixer vanes having a first size and shape; and a second set of mixer vanes having a second size and shape and located radially outwardly from the first set of mixer vanes the second size and shape being different from the first size and shape, wherein the first set of mixer vanes is carried on a disc-shaped wall structure, wherein the second set of mixer vanes is carried on a cone shaped wall structure. - View Dependent Claims (12, 13)
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14. An exhaust mixer for use in an engine exhaust system downstream from an additive injector, the mixer comprising:
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a first set of triangular shaped mixer vanes; and a second set of trapezoidal shaped mixer vanes spaced radially outwardly from the first set of vanes, wherein the first set of mixer vanes is carried on a disc-shaped wall structure, wherein the second set of mixer vanes is carried on a cone shaped wall structure. - View Dependent Claims (15, 16)
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17. An exhaust mixer for use in an engine exhaust system downstream from an additive injector, the mixer comprising:
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a first disc-shaped wall structure with a plurality of flow openings formed therein; a second wall structure carrying a set of mixer vanes, the second wall structure being cone shaped and extending radially outwardly from of the first wall structure; and wherein at least one of the vanes of the set of mixer vanes is divided to form at least a pair of subvanes, each of the subvanes having a different angle of intersection with the second wall structure from the other of the subvanes.
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Specification