EP3265656A1 - Mix box - Google Patents
Mix boxInfo
- Publication number
- EP3265656A1 EP3265656A1 EP16709740.1A EP16709740A EP3265656A1 EP 3265656 A1 EP3265656 A1 EP 3265656A1 EP 16709740 A EP16709740 A EP 16709740A EP 3265656 A1 EP3265656 A1 EP 3265656A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- housing
- tube
- flow
- mix box
- outlet pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2892—Exhaust flow directors or the like, e.g. upstream of catalytic device
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/21—Mixing gases with liquids by introducing liquids into gaseous media
- B01F23/213—Mixing gases with liquids by introducing liquids into gaseous media by spraying or atomising of the liquids
- B01F23/2132—Mixing gases with liquids by introducing liquids into gaseous media by spraying or atomising of the liquids using nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/10—Mixing by creating a vortex flow, e.g. by tangential introduction of flow components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/30—Injector mixers
- B01F25/31—Injector mixers in conduits or tubes through which the main component flows
- B01F25/313—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit
- B01F25/3131—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit with additional mixing means other than injector mixers, e.g. screens, baffles or rotating elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features
- F01N13/18—Construction facilitating manufacture, assembly, or disassembly
- F01N13/1888—Construction facilitating manufacture, assembly, or disassembly the housing of the assembly consisting of two or more parts, e.g. two half-shells
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F2025/93—Arrangements, nature or configuration of flow guiding elements
- B01F2025/931—Flow guiding elements surrounding feed openings, e.g. jet nozzles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/20—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a flow director or deflector
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
- F01N2470/00—Structure or shape of exhaust gas passages, pipes or tubes
- F01N2470/02—Tubes being perforated
- F01N2470/04—Tubes being perforated characterised by shape, disposition or dimensions of apertures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
- F01N2470/00—Structure or shape of exhaust gas passages, pipes or tubes
- F01N2470/18—Structure or shape of exhaust gas passages, pipes or tubes the axis of inlet or outlet tubes being other than the longitudinal axis of apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
- F01N2470/00—Structure or shape of exhaust gas passages, pipes or tubes
- F01N2470/20—Dimensional characteristics of tubes, e.g. length, diameter
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
- F01N2490/00—Structure, disposition or shape of gas-chambers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
- F01N2490/00—Structure, disposition or shape of gas-chambers
- F01N2490/18—Dimensional characteristics of gas chambers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion
- F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
- F01N3/2066—Selective catalytic reduction [SCR]
Definitions
- the invention relates to a device for mixing exhaust gases, thus a mix box for an exhaust system of an internal combustion engine for mixing additives in an exhaust gas stream with at least one E tube axis having inlet tube, with at least one A tube axis having outlet tube and with a a housing wall having housing with an inner side and an outer side for receiving the inlet tube and the outlet tube, wherein the housing limits a volume V of the Mix Box from an environment, wherein the inlet tube ends a dosing device, such as injection nozzle and an inlet part disposed within the housing having a diameter Dz and having a length Lz which is provided with at least one inflow opening for introducing the exhaust gas into the housing, the outlet pipe being an injection nozzle at its end and an outflow part having a diameter Da and ei arranged inside the housing ner length La, which is provided for the purpose of discharging the exhaust gas from the housing with at least one outflow opening, wherein a flow zone S is provided between the inlet tube and the outlet tube, which is bounded later
- a mixing tube arrangement with housing from WO 2014/167355 A1 is known.
- the assembly includes an outlet tube partially disposed in the housing.
- US 2014 0 202 141 A1 discloses a mixing tube assembly with housing is known, wherein the inlet tube and outlet tube are perforation-free and aligned at right angles to each other.
- a mixing tube assembly with housing is already known.
- the assembly also includes an inlet tube and an outlet tube disposed parallel thereto and disposed in the housing.
- the object of the invention is to design and arrange a mixing tube arrangement in such a way that, despite the simple structure, optimum interference is achieved.
- the object is achieved according to the invention in that over at least 30% to 90% or 30% to 50% or 70% or 90% of the length La at least a proportion Sf of 70% or 80% or 90% of the flow zones S is free of flow guide , wherein a flow guide element causes a flow deflection in a direction of contact U or in a direction R radially to the A-axis axis and the flow guide element has a wall side and a gas side, both of which are arranged within the volume V.
- the respective flow zone S between the inflow part and the outflow part lies in the sectional plane to be considered, which is usually placed at right angles to the A tube axis.
- the flow zone S ends at the top of the height of the E-tube axis and at the bottom of the height of the A-tube axis. Laterally, the flow zone S ends at the two boundary surfaces B1, B2.
- the sum of all flow zones S of the different sectional planes spans a flow volume Vs as part of the housing volume.
- Flow guide elements are components within the volume V which supplement the housing wall on the inside and which have a not insignificant influence on the deflection of the exhaust gas flow in the circumferential direction U to the A pipe axis and / or in a direction R radially to the A pipe axis.
- Parts of the housing wall which limit the volume V of the mix box to the outside are not to be regarded as flow guide elements in the sense of the invention. This also applies if these parts of the housing wall within the flow zone S are arranged.
- Flow guiding elements are characterized in that both their wall or outer side facing the next housing wall and their gas or inner side facing the main gas flow are arranged within the housing in the volume V.
- the outflow part is the part of the outlet tube which has the at least one outflow opening.
- a plurality of outflow openings are provided in the form of a row, which are distributed over the circumference U. If the outlet pipe has an outflow part which is substantially shorter than the part of the outlet pipe located in the housing, the sum of the lengths of the different rows of outflow openings should be taken into account when assessing the proportion of the length La which is free of flow guide elements together form the length of the discharge part.
- the distances r1, r2 are the same with respect to an axis A2 arranged at right angles to the A-axis of the pipe or deviate at most by 10% or 20% or 30%, or
- the distance r5 to the next flow guide element and / or the distance r6 to the next housing wall is the same or deviates at most by 10% or 20% or 30% and / or
- the ratio of tube radius Ra to at least one of the distances r1 or r5 or r6 is a maximum of six or a maximum of three or
- angular range ⁇ of the flow thread F can be selected as a starting point or as an angle bisector, so that within the corresponding sector, the said distances or ratios are provided.
- inflow openings and outflow openings can also be designed as flaps or inward-facing and / or outward-facing openings
- the indication of the diameter Dz, Da and the radii Ra is set to the mean diameter or the diameter of the original pipe wall without flaps or formations.
- a minimum size for the flow zone S would be achieved if a part of the housing wall is designed as a flow guide and / or if further flow guide are provided in the form of baffles, with a direct flow connection between the inlet tube and the outlet tube with respect to at least one flow thread F in the direction a flow vector T is provided, wherein the flow vector T connects the E-tube axis and the A-tube axis.
- the housing may advantageously have a cubic or cylindrical basic shape with a cylinder radius Z, wherein at least 80% to 90% of the surface portions of the housing wall are formed either flat or have a cylinder radius Z corresponding radius of curvature K.
- Such a simple housing forms the basis for a possible unaffected exhaust gas flow within the housing between the inlet and the outlet pipe.
- the outflow part can be flowed around on its outside by 360 °.
- a distance from the housing wall of at least Da / 8 to Da / 4 is provided.
- the symmetry of the inflow is ensured in the outflow of the outlet pipe.
- a metering device such as an injection nozzle
- the spray angle ⁇ is selected such that an intersection point X with the tube wall within the mixing sector S2 lies after the rinsing sector S1.
- the outlet pipe penetrates the housing wall at two opposite positions.
- the outlet pipe in the region of one or more outflow openings in each case has a wing which is articulated at least on one side and projects inwards or outwards in the radial direction.
- the wing is designed like a flap, it has a straight bending edge on. Starting from a rectangular basic shape, this can thus have three free sides, so that the exhaust gas can flow over the wing over at least 60% to 80% of its circumference over the free edge and can enter the outflow opening.
- blades can be provided which have a rounded connection to the pipe wall, which is usually longer than a straight bending edge. In this case, the exhaust gas can only flow around the wing over the free edge over a smaller part of its circumference and enter the outflow opening.
- an intermediate wall which is aligned parallel to a main flow direction H.
- the intermediate wall serves to stabilize the housing or for the storage of the tubes. An adverse effect on the flow of exhaust gas within the housing between the inlet and the outlet pipe thus does not take place. It will be eliminated by the intermediate wall only flow components with a directional component parallel to the E or A tube axis. This in turn contributes to the formation of a calm flow between the two tubes.
- the inlet tube has a frusto-conical basic shape G1 and / or the outlet tube has a frusto-conical basic shape G2, wherein the inlet tube and the outlet tube with respect to the basic shape G1, G2 in the same direction or are oriented in opposite directions.
- the housing itself or the cross section of the housing may also be formed frusto-conical.
- the housing is formed from a maximum of two or three housing parts and at least one connecting flange for both Has housing parts. This ensures a simple structure on the one hand and favorable mounting conditions for the pipes on the other. Both housing parts can be made from the same shell blank. With the exception of special types such as flanges, each housing part usually has its own flange, so that both flanges are connected to each other for coupling the two housing parts.
- the housing has a first housing part with a first housing edge and at least one second housing part with a second housing edge, wherein both housing parts are at least partially connected via the housing edge spanning a division plane e, the housing edge being connected with reference to FIG a normal N of the division plane e point-symmetrical or with respect to a straight line G of the division plane e is formed axisymmetric. While the axisymmetric design of the housing edge or of the flange allows a variation of the relative position of both housing parts pivoted in two positions by 180 °, the point-symmetrical design ensures at least one variation within at least four positions, that is gradually by 90 °.
- the sector S1 is preferably wing-free.
- a spray cone is provided with a spray angle ⁇ , wherein the spray angle ⁇ is selected such that an intersection point X between the spray cone and the outlet pipe in the flow direction to the first sector S1 and / or within the second sector S2 is provided.
- the spray angle ⁇ is selected such that an intersection point X between the spray cone and the outlet pipe in the flow direction to the first sector S1 and / or within the second sector S2 is provided.
- the housing has a first housing part with a first housing edge and at least one second housing with a second housing edge, wherein both housing parts are at least partially connected via the housing edge, and if the inlet tube has an inlet part arranged inside the housing which is provided for the purpose of introducing the exhaust gas into the housing with at least one inflow opening, wherein
- the respective housing edge has at least two formations, each with a central axis and / or
- the respective housing part at least two passages each having a central axis has se
- the respective pipe is designed to be symmetrical with regard to the construction of the bearing points and can be stored in at least two different positions P1, P2 in the respective shaping or ii) the inlet pipe and the outlet pipe are of the same design with respect to the construction of the bearing points.
- the inlet tube or outlet tube may be rotated to change the orientation of the inlet and outlet of the tube, and thus the exhaust gas routing. This change in position can only be used for the inlet pipe or only for the outlet pipe.
- the gas guidance geometry can be achieved independently of the flexible storage of the tubes according to variants i) and ii).
- the arranged in the respective shell or in the housing bottom tubes or the associated Gas enclosuresgeometrie is by changing the relative Location of both housing shells or housing walls to each other varies.
- P1, P2 is not only a right angle, but also any angle into consideration.
- the shape of the respective housing edge ensures a recording of the respective pipe over a partial circumference of about 180 °, so that a storage and sealing of the respective tube over the circumference U is ensured by both opposing formations as well as the passage.
- Figure 1 is a schematic diagram of the mix box with cubic basic shape
- Figure 2 is a schematic diagram of the Mix Box with cylindrical basic shape
- FIG. Fig. 1 or 2 shows the schematic diagram of a sectional view according to FIG. Fig. 1 or 2;
- FIG. 4 a shows a schematic diagram of the sectional representation y - y from FIG. 3;
- Figure 4b is a sectional view of Figure 4a with other parameters;
- FIG. 4c shows a schematic diagram of the length La
- FIG. 4d shows another schematic diagram of the length La
- FIG. 4e shows a schematic diagram of the proportion Sf and Sa of the flow zones S
- Figure 5 is a schematic diagram of an exhaust system
- Figure 6 shows the schematic diagram of an outlet pipe in side view
- FIGS. 7a-8 show the schematic diagram of the mix box with frustoconical tubes; Figures 9a, 9b, the mix box in the view from above; FIG. 9c shows the mixing box according to FIG. 9b in side view;
- a mix box 1 according to FIG. 1 is formed from two housing parts 4.1, 4.2, each having a housing edge 4a, 4b, which are coupled to one another via a connecting flange 4.4.
- an inlet pipe 2 with an inlet E for exhaust gas is arranged, while in the second housing part 4.2 an outlet pipe 3 with an outlet A is placed.
- the respective housing part 4.1, 4.2 has corresponding passages within which the tubes 2, 3 are mounted.
- the outlet pipe 3 has a spray nozzle 8, via which an additive can be introduced into the outlet pipe 3.
- a swirl mixer 10 is preferably placed on the outlet pipe 3.
- the connecting flange 4.4 of the basic cylindrical shape is round, while both housing parts 4.1, 4.2 have a radius of curvature K corresponding to the cylinder radius Z.
- the inlet pipe 2 has an inflow part 2.2 of the length Lz which is arranged within the housing 4 and which is formed from a plurality of rows of inflow openings 2.3.
- the exhaust gas is deflected via the inflow openings 2.3 in the radial direction and flows out of the inlet pipe 2 of a main flow direction H to the outlet pipe 3.
- the outlet pipe 3 in turn has an outflow part 3.2 of the length La, via which the exhaust gas, starting from the interior of the housing 4, flows into the outlet pipe 3 in the radial direction to the A pipe axis and from there in the axial direction to the outlet pipe 3 via the mix box 1 leaves the outlet 3.8.
- an intermediate wall 9.2 is provided, which is aligned parallel to the main flow direction H.
- the housing 4 has a housing wall 4.3 with an inner side 4i and an outer side 4o, which has a volume V of the housing 4 with respect to an exhaust-free environment G. borders.
- the housing 4 has a rectangular cross-sectional basic shape. In the left half of the picture, a recess 4.5 is shown inside the housing wall. In addition, the housing wall 4.3 at the lower left edge on a rounding 4.7.
- the inlet pipe 2 or the inflow part 2.2 has a diameter Dz and the outlet pipe 3 or the outflow part 3.2 has a diameter Da.
- the diameter Dz and / or the diameter Da can vary over the respective length Lz, La as shown by way of example in FIGS. 7a, 7b.
- indentation 4.5 and rounding 4.7 Two alternatives for indentation 4.5 and rounding 4.7 are shown in the right half of the picture.
- the baffle 9.3 forms a taper similar to the indentation 4.5.
- the baffle 9.1 forms a rounding similar to the rounding 4.7.
- the flow guide 9.1, 9.3 are not part of the housing wall 4.3, because they do not serve to limit the volume V against an exhaust gas-free environment G. Because the wall side 9w is disposed within the housing 4 and not in the environment.
- both the inlet tube 2 and the outlet tube 3 are placed symmetrically within the housing 4. Between the two tubes 2, 3 extends a flow zone S, which extends up to the height of the tube axis 2.1 and down to the height of the tube axis 3.1. Laterally, the flow zone S is limited by two boundary surfaces B1, B2, wherein the boundary surface B1 is arranged at a distance a12 to the pipe axis 2.1 and at a distance a13 to the pipe axis 3.1.
- the boundary surface B2 is arranged at a distance a22 to the pipe axis 2.1 and at a distance a23 to the pipe axis 3.1.
- the distances a12 and / or a22 can vary over the length Lz.
- the distances a13 and / or a23 can vary over the length La.
- the axial extent of the flow zone S corresponds to the axial extent of the inflow part 2.2 or of the outflow part 3.2, and consequently of the respective length Lz or length La.
- the boundary surface B2 in FIG. 4a With regard to the boundary surface B2 in FIG. 4a, the distances a22, a23 are maximized.
- the boundary surface B2 is at the level of the guide plate 9.3, which is arranged within the housing 4. While the flow guide 9.3 is placed outside the flow zone S, the indentation 4.5 is arranged as part of the housing wall 4.3 within the flow zone S.
- both the distances r1, r2, r3, r4, r5 between the tubes 2, 3 and the housing wall 4.3 and, for example, the distance r6 between the tube 3 and the flow-guiding element 9.1 are shown.
- the wall spacings r1 to r4 are of approximately equal size with respect to an axis A1, A2 arranged at right angles to the respective pipe axis 2.1, 3.1.
- the sizes of the wall spacings r1 to r4 differ by a maximum of 10% to 30%.
- the interior of the housing 4 is free of flow guide elements, which would influence an inflow of the outlet pipe 3, starting from the inlet pipe 2.
- the indentation 4.5 of the housing wall or the rounding 4.7 has an influence. These are easy to produce as part of the housing wall. Between the outlet pipe 3 and the indentation 4.5, the distance r5 is present.
- the two flow guide 9.1, 9.3 are formed in the form of separate baffles. Although they have a similar effect on the flow, but represent separate components that need to be mounted separately.
- the distance r6 is shown by way of example.
- the radius Ra of the outlet tube 3 is about 20% greater than the wall distances r1 to r5 or greater than the distance r6 to the flow guide 9.1.
- the symmetrical arrangement of the outlet tube 3 is improved within the housing 4, the housing 4 in the left half of a recess 4.5 and a rounding 4.7. These ensure that the radial distance r5 between the outlet tube 3 and the housing wall 4.3 over an angular range ß of about 140 ° is almost identical.
- baffles 9.3, 9.1 are provided according to FIG.
- FIG. 4c shows a schematic representation of the length La of the outflow part 3.2, wherein the outflow openings 3.3, which are present as mixed rows or mixing stages, are distributed over the entire length La.
- the outflow part 3.2 is in two parts. Two sections of outflow openings 3.3 or mixing rows or mixing stages are provided, each of which forms part of the outflow part 3.2.
- the length La is therefore the sum of the lengths of both sections.
- FIG. 4e shows different flow zones S within the length La on the one hand and different flow guide elements 9.1, 9.3 on the other hand. About 77% of the length La, a flow volume Vs can be formed, which is defined by the flow zones S.
- the flow volume Vs is shown on the right side starting with the first flow zones S only partially stylized.
- the front part of the outflow part 3.2 is blocked by flow guide elements 9.3, so that in this area no flow zone S, but at least no flow volume Vs can be formed. Within this flow volume, a portion Sf of the flow zones S is free, while a remaining part Sb is blocked by flow guide 9.1.
- Figure 5 shows the schematic diagram of an exhaust system 5 with the Mix Box 1 and connected thereto exhaust pipes 5.1, 5.2, via which the exhaust system is connected to the motor vehicle or an exhaust muffler.
- the outlet pipe 3 has a plurality of rows 3.5 of openings 3.3, an injection nozzle 8 at the inlet 3.7 and an open end at the outlet 3.8.
- a first sector S1 is provided with two rows 3.5 of openings 3.3 with a central opening cross-section Q1, and thus two stages M1 of first order.
- the openings 3.3 are each formed as a wing-free recess of the housing wall 4.3.
- the sum of all opening cross-sections Q1 of a sector S1 is SQ1.
- the sum of all opening cross-sections Q of all openings 3.3 of all rows 3.5 of the outlet pipe 3 is SQ.
- first SQ1 ⁇ 0.15 SQ.
- a second sector S2 is provided with a plurality of stages M2 formed from a plurality of rows 3.5 of openings 3.3 with a central opening cross-section Q2.
- the sum of all opening cross sections Q2 of the sector S2 is SQ2.
- the openings 3.3 are formed as a shape of the housing wall 4.3, wherein the molded part of the housing wall 4.3 forms a wing 3.4.
- a third sector S3 is provided with a step M3 with a row 3.5 of openings 3.3 with a central opening cross-section Q3.
- All openings 3.3 extend in the circumferential direction U.
- the injection nozzle 8 has a spray cone 8.1, which nominally (without consideration of a flow) has an opening angle ⁇ of about 80 °.
- the spray cone 8.1 cuts the outlet pipe 3 at the intersection point X, which is arranged within the sector S2.
- both the inlet tube 2 and the outlet tube 3 of their basic shape G1, G2 are configured in the manner of a truncated cone.
- both tubes 2, 3 are arranged in opposite directions with respect to the alignment along the tube axis 2.1, 3.1, whereas according to the embodiment according to FIG. 8 both tubes 2, 3 are arranged in the same direction.
- the housing 4 has a likewise frusto-conical at least in cross-section basic shape, which can be used in appropriate space conditions.
- the formation of a corresponding basic shape or the use of corresponding flow guide elements is necessary in order to ensure the aforementioned distances a12 to a23 or distances r1 to r6, thus symmetrical flow conditions.
- the casing edge 4a, 4b (not illustrated further) is square-shaped, thus point symmetrical with respect to a normal N of the dividing plane e, so that the two housing parts 4.1, 4.2 can be pivoted by 90 °.
- the pivoting takes place by 90 ° to the right. Further swiveling possibilities by corresponding 180 ° or 270 ° or -90 ° are of course also possible.
- Both tubes 2, 3 are stored in a pair of passages 7.1 to 7.4.
- the first housing half or the first housing part 4.1 and the second housing half or the second housing part 4.2 are located in the relative position P1.
- both housing shells 4.1, 4.2 are in the relative position P2, rotated by 90 ° relative to one another.
- FIG. 9c shows the side view to FIG. 9b with the dividing plane e and the connected housing edges 4a, 4b.
- the inlet pipe 2 and the outlet pipe 3 are placed in the respective bearing 2.4, 3.6, which is designed as a passage.
- the two tube axes 2.1, 3.1 are aligned in parallel.
- the tubes 2, 3 are both in the relative position P2 with respect to the respective housing half 4.1, 4.2.
- the mixing box 1 shown in FIGS. 10a, 10b has a housing 4 with two housing parts 4.1, 4.2 designed as a housing shell, in each of which four moldings 6.1, 6.2, 6.3, 6.4 (only two each shown) are provided, wherein in the FIGS Formations 6.1, 6.3 an inlet pipe 2 in a position P1 and in the formations 6.2, 6.4, an outlet pipe 3 are arranged in the position P1.
- the respective tube 2, 3 has bearings 2.4, 2.5, 3.6, over which it is mounted in the respective shape.
- the respective housing edge 4a, 4b is aligned parallel to the tube axis 2.1, 3.1. Where the housing edges 4a, 4b are abuttable against each other, they form the division plane e for the housing 4.
- Both the inlet tube 2 and the outlet tube 3 have a tube axis 2.1, 3.1, coaxial with a central axis 6a, 6b respective mating 6.1, 6.3 and 6.2, 6.4 is aligned.
- the inlet tube 2 is rotated by 180 ° in contrast to the embodiment according to FIG. 10a.
- the inlet pipe 2 is in a position P2, while the outlet pipe 3 has remained in the position P1.
- the inlet tube 2 In the region of its bearing points 2.4, 2.5, that is to say in the region of the respective shape 6.1, 6.3, the inlet tube 2 has the same diameter D, so that it can be rotated by 180 ° without further ado can.
- the two housing parts 4.1, 4.2 remain in the same relative position P1 to each other. The same is also applicable to the outlet tube 3.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
- Exhaust Silencers (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102015103303.8A DE102015103303B3 (de) | 2015-03-06 | 2015-03-06 | Mix Box |
| PCT/EP2016/054662 WO2016142292A1 (de) | 2015-03-06 | 2016-03-04 | Mix box |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3265656A1 true EP3265656A1 (de) | 2018-01-10 |
| EP3265656B1 EP3265656B1 (de) | 2020-02-19 |
Family
ID=55527537
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP16709740.1A Revoked EP3265656B1 (de) | 2015-03-06 | 2016-03-04 | Mix box |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US10626773B2 (de) |
| EP (1) | EP3265656B1 (de) |
| JP (1) | JP2018508700A (de) |
| CN (1) | CN107438705B (de) |
| DE (1) | DE102015103303B3 (de) |
| WO (1) | WO2016142292A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11311845B2 (en) | 2019-10-22 | 2022-04-26 | Purem GmbH | Mixer |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106401715A (zh) * | 2016-10-24 | 2017-02-15 | 无锡威孚力达催化净化器有限责任公司 | 斜管式旋流尿素混合装置 |
| DE102016224617A1 (de) | 2016-12-09 | 2018-06-14 | Man Diesel & Turbo Se | Mischvorrichtung für ein Abgasnachbehandlungssystem, Abgasnachbehandlungssystem und Brennkraftmaschine |
| DE202019100256U1 (de) | 2019-01-17 | 2019-02-25 | Hjs Emission Technology Gmbh & Co. Kg | Einrichtung zum Zuführen eines chemischen Reaktionsmittels in den Abgasstrang einer Brennkraftmaschine |
| CN114542248B (zh) * | 2022-01-18 | 2023-06-23 | 潍柴动力股份有限公司 | Scr系统和发动机 |
Family Cites Families (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0113226D0 (en) * | 2001-06-01 | 2001-07-25 | Nelson Burgess Ltd | Catalytic converter |
| SE528092C2 (sv) * | 2004-06-17 | 2006-09-05 | Ggp Sweden Ab | Anordning vid förbränningsmotor |
| JP4928304B2 (ja) * | 2007-02-23 | 2012-05-09 | 日野自動車株式会社 | 排気浄化装置 |
| JP4886547B2 (ja) * | 2007-02-23 | 2012-02-29 | 日野自動車株式会社 | 排気浄化装置 |
| DE202007010324U1 (de) * | 2007-07-25 | 2008-11-27 | Heinrich Gillet Gmbh | Vorrichtung zum Nachbehandeln der Abgase von Dieselmotoren |
| EP2025890B1 (de) | 2007-08-15 | 2010-11-10 | Kubota Corporation | Abgasvorrichtung für einen Dieselmotor |
| EP2168672A1 (de) | 2008-09-24 | 2010-03-31 | Emcon Technologies UK Limited | Mischgerät |
| DE102010014037A1 (de) * | 2009-04-02 | 2010-11-04 | Cummins Filtration IP, Inc., Minneapolis | Reduktionsmittelzersetzungssystem |
| EP3267005B2 (de) * | 2010-06-22 | 2023-12-27 | Donaldson Company, Inc. | Abgasnachbehandlungsvorrichtung |
| DE102011077183B4 (de) * | 2011-06-08 | 2015-05-21 | Eberspächer Exhaust Technology GmbH & Co. KG | Schalldämpfer und Herstellungsverfahren |
| JP5985822B2 (ja) * | 2011-12-28 | 2016-09-06 | 日野自動車株式会社 | 排気浄化装置 |
| DE102012014334A1 (de) * | 2012-07-20 | 2014-05-15 | Man Truck & Bus Ag | Mischvorrichtung zur Nachbehandlung von Abgasen |
| GB2511486A (en) * | 2013-01-22 | 2014-09-10 | Daimler Ag | Mixing device for an exhaust system of a vehicle |
| EP2984308B1 (de) * | 2013-04-11 | 2018-08-29 | Perkins Engines Company Limited | Mischer und abgasreinigungsmodul |
| US9410464B2 (en) * | 2013-08-06 | 2016-08-09 | Tenneco Automotive Operating Company Inc. | Perforated mixing pipe with swirler |
| US9435240B2 (en) * | 2013-08-06 | 2016-09-06 | Tenneco Automotive Operating Company Inc. | Perforated mixing pipe with swirler |
| DE102013114111A1 (de) * | 2013-12-16 | 2015-06-18 | Tenneco Gmbh | Mischrohranordnung mit Gehäuse |
| JP5898714B2 (ja) * | 2014-03-07 | 2016-04-06 | ヤンマー株式会社 | エンジン装置 |
| DE102014108809C5 (de) * | 2014-06-10 | 2019-04-25 | Tenneco Gmbh | Abgasmischer |
| DE102016224617A1 (de) * | 2016-12-09 | 2018-06-14 | Man Diesel & Turbo Se | Mischvorrichtung für ein Abgasnachbehandlungssystem, Abgasnachbehandlungssystem und Brennkraftmaschine |
-
2015
- 2015-03-06 DE DE102015103303.8A patent/DE102015103303B3/de not_active Revoked
-
2016
- 2016-03-04 CN CN201680013481.7A patent/CN107438705B/zh active Active
- 2016-03-04 EP EP16709740.1A patent/EP3265656B1/de not_active Revoked
- 2016-03-04 WO PCT/EP2016/054662 patent/WO2016142292A1/de not_active Ceased
- 2016-03-04 JP JP2017546860A patent/JP2018508700A/ja active Pending
- 2016-03-04 US US15/552,416 patent/US10626773B2/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11311845B2 (en) | 2019-10-22 | 2022-04-26 | Purem GmbH | Mixer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107438705B (zh) | 2020-06-02 |
| CN107438705A (zh) | 2017-12-05 |
| US20180030874A1 (en) | 2018-02-01 |
| EP3265656B1 (de) | 2020-02-19 |
| WO2016142292A1 (de) | 2016-09-15 |
| DE102015103303B3 (de) | 2016-09-01 |
| JP2018508700A (ja) | 2018-03-29 |
| US10626773B2 (en) | 2020-04-21 |
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