Source: https://patents.google.com/patent/US20090262599A1/en
Timestamp: 2019-04-24 18:21:26
Document Index: 772042371

Matched Legal Cases: ['art 60', 'art 60', 'art 60', 'art 60', 'art 60', 'art 60', 'art.\n8', 'art.\n11']

US20090262599A1 - Method for mixing an exhaust gas flow - Google Patents
Method for mixing an exhaust gas flow Download PDF
US20090262599A1
US20090262599A1 US12/386,627 US38662709A US2009262599A1 US 20090262599 A1 US20090262599 A1 US 20090262599A1 US 38662709 A US38662709 A US 38662709A US 2009262599 A1 US2009262599 A1 US 2009262599A1
US12/386,627
US8272777B2 (en
Balthasar Hipp
Heinrich Gillet GmbH (Tenneco)
2008-04-21 Priority to DE102008020008.5 priority Critical
2008-04-21 Priority to DE102008020008 priority
2009-04-21 Application filed by Heinrich Gillet GmbH (Tenneco) filed Critical Heinrich Gillet GmbH (Tenneco)
2009-06-11 Assigned to HEINRICH GILLET GMBH (TENNECO) reassignment HEINRICH GILLET GMBH (TENNECO) ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DOLL, MANFRED, GEHRLEIN, JOACHIM, HIPP, BALTHASAR, JOST, MARKUS, KOHRS, STEFAN, LANG, ANDREAS, PALMER, GUNTER
2009-10-22 Publication of US20090262599A1 publication Critical patent/US20090262599A1/en
2012-08-10 Priority claimed from US13/571,542 external-priority patent/US8939638B2/en
2012-09-25 Publication of US8272777B2 publication Critical patent/US8272777B2/en
2013-07-01 Assigned to TENNECO GMBH reassignment TENNECO GMBH CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: HEINRICH GILLET GMBH
2013-11-26 Priority claimed from US14/089,822 external-priority patent/US9095827B2/en
The invention relates to a method for mixing an exhaust gas flow with a fluid in an exhaust gas pipe 40 of an exhaust gas system 4, in which the fluid is injected by means of an injection device 5 into the exhaust gas pipe 40. The exhaust gas flow is guided in the exhaust gas pipe 40 in the area of the injection device 5 in a direction of flow S parallel to the exhaust gas pipe 40. The fluid is injected directly onto a deflection element 6 which is arranged in the exhaust gas pipe 40 in a central direction of injection E which deviates from the direction of flow S by an angle se, wherein by means of at least one sheet metal part 60 which is provided on the deflection element 6 and which is raised at least partially at an angle sv with reference to the direction of flow S, the exhaust gas flow is diverted with reference to the direction of flow S from its direction of flow S into a central direction of distribution V. Before and after it impacts the deflection element 6, the fluid is carried along at least partially by the diverted part of the exhaust gas flow into the direction of distribution V and is diverted into the direction of distribution V by the raised sheet metal part 60.
Several mixing fins are provided on the mixing element which are raised with reference to the direction of flow at an angle ms and with reference to the direction of distribution at an angle mv, wherein the angle ms is a maximum of 70°, and the angle mv is greater than 1°. For the mixing process, it is advantageous that the fluid is further diverted by the mixing fins, and is not further guided in the same direction which is determined by the fin or the correction fin.
The mixing fins or the flow elements are raised with reference to the direction of flow at an angle ms of up to 70°, and with reference to the direction of distribution at an angle mv greater than 1°.
FIG. 1 shows a view of a part of an exhaust gas system with a exhaust gas pipe and an injection device, in which a mixer is arranged with a deflection element which is raised in relation to the direction of flow
FIG. 2 shows a view according to FIG. 1 with a mixer and a deflection element with correction plates
FIG. 3 shows a view according to FIG. 1 with a mixer and a deflection element which is designed in a similar manner to a mixer
FIG. 4 shows a mirror symmetry mixer
FIG. 5 shows a point symmetric mixer with a mixing element with a cell
FIG. 6 shows a mixer according to FIG. 4 in an exhaust gas pipe
FIG. 7 shows a point symmetric mixer with supports which are at a distance
FIG. 8 shows a side view of a support with mixing fins which are raised in alternation
FIG. 9 shows a side view of a mixer according to FIG. 7 with a deflection element with correction fins
FIG. 9 a shows a side view of a mixer according to FIG. 7 with a deflection element with drill holes
FIG. 10 shows a view of a mixer with flow elements which lie in contact with each other
FIG. 11 shows three flow elements for a mixer according to FIG. 10 which are arranged differently in relation to their respective profile axis
FIG. 12 shows a side view of a mixer according to FIG. 10 in an exhaust pipe with a pre-activated deflection element
FIG. 13 shows an angle diagram for the deflection element and the injection device
FIG. 14 shows an angle diagram for the mixing fin in relation to the deflection element
FIG. 2 shows part of an exhaust gas system 4 as is described with reference to FIG. 1, although here, a mixer 1 with mixing fins 31 is integrated, as is generally shown in greater detail in FIGS. 4 to 7. The deflection element 6 for such mixers 1 with mixing fins 31 is shown in greater detail in FIG. 9, and comprises as part of the deflection element 6 a sheet metal part 60 which is arranged parallel to the direction of flow, with a fin 61 which is raised at the angle sv and further correction plates 62 with correction fins 64.
The mixers 1 according to FIGS. 4, 6 and 7 comprise three mixing elements 3 which are arranged transverse to the direction of flow S and adjacent to each other respectively, and one to two additional mixing elements 3 a. The mixing element 3, 3 a consists fundamentally of a support 30, 30 a and one or several mixing fins 31, 31 a which are arranged on it. The respective mixing fin 31, 31 a is affixed to the support 30, 30 a via its border area hR with reference to the direction of flow S. Side border areas sR and a front border area vR with reference to the direction of flow S form free flow edges and are neither connected to another mixing fin 31, 31 a, nor to a housing 2 or an exhaust pipe 40.
The housing 2 is a cylindrical pipe part, on the inner sheath surface 20 of which the mixing elements 3 and, depending on the exemplary embodiment, the additional mixing elements 3 a, are affixed. A mixer 1 of this type is inserted with the housing 2 into an exhaust gas pipe 40 of an exhaust gas system 4, as is shown in FIG. 2, and exhaust gas flows through it in a direction of flow S which is parallel to a central axis 23 of the housing 2.
As well as the three mixing elements 3, two additional mixing elements 3 a are also provided in the areas next to the mixing elements 3. The additional mixing element 3 a is formed by a support 30 a and a mixing fin 31 a. The aditional mixing element 3 a is affixed via its two end areas 34 a to the inner sheath surface 20 of the housing 2, and in a freely supporting manner between the two end areas 34 a.
In the exemplary embodiments according to FIGS. 4 to 9 a, the mixing fins 31 encompass an angle β with reference to the direction of the support 30 and an angle ms with reference to the direction of flow S. The mixing fins 31 are shown in alternation. As is shown in greater detail in FIGS. 8 and 9, the angle β is +135° or −135°, and the angle ms is +45° or −45°. Furthermore, mixing fins 31 which are directly adjacent partially comprise, as is shown in particular in FIG. 7, a regular distance 33 from each other of at least 1 mm.
In an exemplary embodiment not shown, the adjacent end areas 34 are connected with each other by two supports 30 which are arranged adjacent to each other. Additionally, one end area 34 a respectively of the additional mixing elements 3 a is connected with one end area 34 respectively of the adjacent mixing element 3. This is achieved by means of the fact that the three mixing elements 3 and the two additional mixing elements 3 a are produced from a single sheet metal strip.
As well as the three mixing elements 3, an additional mixing element 3 a is provided below the three mixing elements 3. The additional mixing element 3 a is formed by a support 30 a and a mixing fin 31 a, which also comprises a slit 39. The additional mixing element 3 a is affixed via its two end areas 34 a to the inner sheath surface 20 of the housing 2 and in a freely supporting manner between the two end areas 34 a.
FIG. 5 shows a point symmetrical mixer 1 with two identical mixing elements 3, 3′. The respective mixing element 3, 31 respectively comprises two end areas 34, 340 and two connecting areas 370, 380 which are provided between the end areas 34, 340. The end area 34 and the first connecting area 370 of the respective support 30 are connected with each other, so that a partial area 301 of the support 30 forms a closed cell 300. On the partial area 301 of the support 30 which surrounds the cell 300, two mixing fins 31 are arranged on the support 30. The mixing element 3 is affixed to the exhaust gas pipe 40 via the end area 340 and the second connecting area 380.
The point symmetrical mixer 1 according to the exemplary embodiments in accordance with FIGS. 5 and 7 can equally be combined with a deflection element 6, as can the mirror symmetrical mixer 1 according to the exemplary embodiments in accordance with FIGS. 4 and 6. The deflection element 6 comprises, as is shown in FIGS. 9 and 9 a, a sheet metal part 60 with one or several fins 61 which are raised at an angle sv of approx. 20°. Due to the fins 61, the exhaust gas flow is diverted upwards in a direction of distribution V and is thus the reduction agent is also swept upwards. The sheet metal part 60 is directly arranged on the support 30, 30 a and in accordance with the exemplary embodiments shown forms with the mixing element 3, 3 a a construction element which is a single piece and which is made of identical material.
The deflection element 6 comprises several correction plates 62, 62′, 62″ which are arranged parallel to the direction of flow S and parallel to the sheet metal part 60, which cause the reduction agent to be distributed directly before the mixer 1. The correction plate 62 is arranged directly on the support 30, 30 a and in accordance with the exemplary embodiments shown forms with the mixing element 3, 3 a a construction element which is a single piece and which is made of identical material.
The correction plates 62, 62′, 62″ according to FIG. 9 a comprise several drill holes 65 instead of correction fins, which are oriented in a drill direction B which runs at an angle bs of 90° to the direction of flow S, through which the exhaust gas flow with the reduction agent can flow at least partially through the deflection element 6 in the direction of the central axis 12.
1. A method for mixing an exhaust gas flow with a fluid in an exhaust gas pipe of an exhaust gas system, in which the fluid is injected into the exhaust gas pipe by an injection device, comprising the steps of:
a) guiding the exhaust gas flow in an area of the injection device in a direction of flow (S) parallel to the exhaust gas pipe in the exhaust gas pipe,
b) injecting the fluid in a central direction of injection (E) which deviates from the direction of flow (S) at an angle se, directly onto a deflection element which is arranged in the exhaust gas pipe, wherein
c) by at least one sheet metal part which is provided on the deflection element and which is raised with reference to the direction of flow (S) at least partially at an angle sv, the exhaust gas flow is partially diverted with reference to the direction of flow (S) from its direction of flow (S) into a central direction of distribution (V),
d) the fluid is carried along at least partially by the diverted part of the exhaust gas flow in the direction of distribution (V) before and after impacting the deflection element, and is diverted by the raised sheet metal part into the direction of distribution (V).
2. The method according to claim 1, wherein the fluid at least partially impacts a correction plate which is arranged with reference to the direction of injection (E) before the sheet metal part, and at least partially undergoes a diversion into the direction of flow (S), and is then diverted into several mixing directions by a static mixer with at least one mixing element, and is thus mixed further.
3. The method according to 1, wherein the raising of the sheet metal part is achieved by means of several fins which are provided on the sheet metal part, which are raised at the same or different angles sv, wherein the angle sv is between 0° and 85°.
4. The method according to claim 2, wherein the correction plate comprises several drill holes which run in a drill direction (B), wherein the drill direction (B) runs with reference to the direction of flow (S) at an angle bs of between 45° and 135°.
5. The method according to claim 2, wherein the correction plate is arranged parallel to the direction of flow (S) and comprises several correction fins which are raised with reference to the direction of flow (S) at an angle sk, wherein the angle sk is between 95° and 265°.
6. The method according to claim 2, wherein several mixing fins are provided on the mixing element which are raised with reference to the direction of flow (S) at an angle ms and with reference to the direction of distribution (V) at an angle mv, wherein the angle ms is a maximum of 70°, and the angle mv is greater than 1°.
7. A deflection element for arrangement in an exhaust gas pipe of an exhaust gas system which guides an exhaust gas flow, and for retaining a fluid which is injected by means of an injection device into the exhaust gas system, wherein the deflection element can be positioned in a direction of flow (S) before a static mixer with at least one mixing element and comprises at least one sheet metal part which can be positioned in the exhaust gas flow, wherein the sheet metal part is raised at least partially with reference to the direction of flow (S) at an angle sv in a direction of distribution (V), as a result of which the exhaust gas flow is diverted with the fluid at least partially from the direction of flow (S) into the direction of distribution (V), wherein a fin which is raised at an angle sv is formed on the sheet metal part.
8. The deflection element according to claim 7, wherein on the sheet metal part, several fins are formed which are raised at the angle sv.
9. The deflection element according to claim 7, wherein deflection element can be positioned in an exhaust gas pipe in such a manner that the fluid to a large extent impacts direction on the deflection element.
10. The deflection element according to claim 7, wherein the deflection element comprises one or several correction panels which are arranged parallel to the direction of flow (S) or parallel to the sheet metal part.
11. The deflection element according to claim 10, wherein the correction plate comprises
a) one or several correction fins which are raised at an angle sk between 95° and 265° and several openings which are formed transverse to the direction of flow (S) by the correction fins, or
b) several drill holes which run in a drill direction (B), wherein the drill direction (B) runs at an angle bs between 45° and 135° with reference to the direction of flow (S), or
12. The deflection element according to claim 10, wherein the sheet metal part protrudes with reference to the opposite direction of flow (S) beyond all correction plates and the metal sheet part is arranged with reference to the central direction of injection (E) behind the last correction plate.
13. The deflection element according to claim 10, wherein the deflection element is designed in mirror symmetry with reference to a central plane which is oriented at right-angles to the direction of flow (S), or the fins or the correction fins, or both the fins and correction fins are arranged in mirror symmetry with reference to the central plane.
14. A multi-stage distributor consisting of a deflection element according to claim 8 and a static mixer which is affixed to the deflection element or which is arranged indirectly behind the deflection element with at least one mixing element, wherein the mixing element comprises at least one support for mixing fins or one flow element.
15. The distributor according to claim 14, wherein the metal sheet part or a correction plate is arranged on the support or on the flow element parallel or diagonal to the direction of flow (S).
16. The distributor according to claim 15, wherein the mixing fins or the flow elements are raised with reference to the direction of flow (S) at an angle ms of up to 70°, and with reference to the direction of distribution (V) at an angle mv greater than 1°.
17. The distributor according to claim 14, wherein the mixing element is designed in mirror symmetry with reference to the central plane which is arranged at right-angles to the direction of flow (S), or the mixing fins or the supports, or both the mixing fins and the supports are arranged in mirror symmetry with reference to the central plane.
18. The distributor according to claim 14, wherein the mixing element is designed in point symmetry with reference to the direction of flow (S), or the mixing fins or the supports, or both the mixing fins and supports are arranged in point symmetry with reference to the direction of flow (S).
19. The distributor according to claim 14, wherein in addition, a housing is provided which is parallel to the exhaust gas pipe and parallel to the direction of flow (S) of the exhaust gas, on which the support or the flow elements are arranged, and the housing can be positioned on or in the exhaust gas pipe.
20. The distributor according to claim 14, wherein
a) the static mixer comprises several mixing elements for the exhaust gas which are arranged transverse to the direction of flow (S) adjacent to each other, wherein each mixing element comprises several mixing fins and each mixing fin (31) comprises one rear border area (hR) and two side border areas (sR) with reference to the direction of flow (S),
b) every mixing element comprises a support which is aligned parallel to the direction of flow (S), on which the mixing fins are arranged via their rear border area (hR) and are raised relative to the support,
d) every support comprises two end areas via which the respective support is affixed to the exhaust gas pipe,
e) at least three mixing elements are provided, the supports of which are arranged adjacent to each other respectively in the area between the end areas transverse to the direction of flow (S), with a distance of at least 5 mm from each other,
f) all mixing fins are arranged at a distance from the exhaust pipe with all side border areas (sR) and with the front border area (vR).
21. The distributor according to claim 14, wherein the static mixer comprises several mixing elements which are arranged transverse to the direction of flow (S) adjacent to each other, and
a) the respective mixing element comprises a support which is aligned parallel to the direction of flow (S) and several mixing fins which are arranged on the support and which are raised relative to the support,
b) each support comprises two end areas and two connecting areas which are arranged between the two end areas and which are arranged facing each other in the direction of the support and at a distance from the end areas,
c) the end area and the first connecting area of the respective support are connected with each other, so that a partial area of the support forms a closed cell, and
d) on the partial area of the support which surrounds the cell, at least two mixing fins are arranged on the support.
22. The distributor according to claim 14, wherein the mixer comprises several flow elements for the exhaust gas which are arranged transverse to the direction of flow (S) adjacent to each other, and
e) the respective flow element is formed from a sheet metal plate with an undulating cross-section profile which comprises several channels which run in the direction of parallel profile axes adjacent to each other,
f) the profile axis of the respective flow element is oriented with reference to the direction of flow (S) at an angle ms of up to 70° or at an angle ms of up to −70°, and wherein,
a) the profile axes are aligned by at least two flow elements which are arranged adjacent to each other in an angle ms which is equal in terms of direction and size.
US12/386,627 2008-04-21 2009-04-21 Method for mixing an exhaust gas flow Active 2030-11-14 US8272777B2 (en)
DE102008020008.5 2008-04-21
DE102008020008 2008-04-21
US13/571,542 US8939638B2 (en) 2008-04-21 2012-08-10 Method for mixing an exhaust gas flow
US14/089,822 US9095827B2 (en) 2008-04-21 2013-11-26 Exhaust gas flow mixer
US14/325,460 US9440204B2 (en) 2008-04-21 2014-07-08 Method for mixing an exhaust gas flow
US14/799,081 US9975093B2 (en) 2008-04-21 2015-07-14 Exhaust gas flow mixer
US13/571,542 Continuation-In-Part US8939638B2 (en) 2008-04-21 2012-08-10 Method for mixing an exhaust gas flow
US20090262599A1 true US20090262599A1 (en) 2009-10-22
US8272777B2 US8272777B2 (en) 2012-09-25
ID=41078767
US12/386,627 Active 2030-11-14 US8272777B2 (en) 2008-04-21 2009-04-21 Method for mixing an exhaust gas flow
US (1) US8272777B2 (en)
DE (4) DE102008028627A1 (en)
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2008-06-18 DE DE200810028625 patent/DE102008028625B4/en active Active
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Owner name: HEINRICH GILLET GMBH (TENNECO), GERMANY
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KOHRS, STEFAN;DOLL, MANFRED;HIPP, BALTHASAR;AND OTHERS;REEL/FRAME:022809/0987
Free format text: CHANGE OF NAME;ASSIGNOR:HEINRICH GILLET GMBH;REEL/FRAME:030717/0315