CN105473833A

CN105473833A - Mirrored two-stage mixer

Info

Publication number: CN105473833A
Application number: CN201480044925.4A
Authority: CN
Inventors: 阿兰·布罗克曼; 迈克尔·戈林
Original assignee: Tenneco Automotive Operating Co Inc
Current assignee: Tenneco Automotive Operating Co Inc
Priority date: 2013-08-08
Filing date: 2014-07-29
Publication date: 2016-04-06
Also published as: KR20160040687A; KR101780339B1; DE112014003645T5; WO2015020830A1; US20150040547A1

Abstract

A mixer for an exhaust aftertreatment system may include a housing and first and second groups of deflectors. The first group of deflectors may be disposed within the housing and may be arranged relative to each other to direct fluid flowing through the first group of deflectors into a first pair of vortices that rotate in opposite directions relative to each other. The second group of deflectors may be disposed within the housing and may be arranged relative to each other to direct fluid flowing through the second group of deflectors into a second pair of vortices that rotate in opposite directions relative to each other. The first and second groups of deflectors may be rotationally symmetric with each other about a longitudinal axis of the housing.

Description

The two-stage mixer of mirror image

Technical field

This disclosure relates to the mixer of the exhaust after treatment system for combustion engine.

Background technique

This part provides relevant to this disclosure and the background information of not necessarily prior art.

Employ the selective catalytic reduction technology combined with the nitrogen oxide existed in the exhaust reducing combustion engine.Many vehicle mountings of combustion engine that utilizes have exhaust gas post-treatment device for reducing nitrogen oxides emissions.Some systems in these systems be by use construct based on the technology of urea, comprise for storage and reduction agent (such as urea) container and for by reducing agent from this container transport to the delivery system of exhaust stream.Mixer is typically provided in the downstream of reducing agent injection syringe, is mixed by the reducing agent through injecting before carrying out with it catalyzer reacted in reducing agent arrival with exhaust.Although these systems may show well in the past, desirably provide a kind of mixer of improvement, in order to make reducing agent and exhaust stream more efficiently and effectively to mix, and more equally distributed reducing agent may be provided in the more large size of catalyzer.

Summary of the invention

This part provides the overview of this disclosure and is not the full disclosure of its four corner or its whole feature.

This disclosure provides a kind of exhaust after treatment system in one form, and this exhaust after treatment system can comprise exhaust passage, exhaust gas post-treatment device and mixer.Exhaust passage can receive exhaust from motor.Exhaust gas post-treatment device can be disposed in exhaust passage.Mixer can be arranged in an exhaust gas, in the upstream of exhaust gas post-treatment device.Mixer can comprise housing and first group of guide plate and second group of guide plate.This first group of guide plate can be arranged in this housing and can be relative to each other arranged to and guide fluid to flow through this first group of guide plate to form first pair of eddy current, and this first pair of eddy current relative to each other rotates in the opposite direction.This second group of guide plate can be arranged in this housing and can be relative to each other arranged to and guide fluid to flow through this second group of guide plate to form second pair of eddy current, and this second pair of eddy current relative to each other rotates in the opposite direction.This first group of guide plate and this second group of guide plate can be that the longitudinal axis each other about this housing is rotational symmetric.

In certain embodiments, this exhaust gas post-treatment device can comprise catalyzer.

In certain embodiments, this exhaust gas post-treatment device can comprise circular shape.In certain embodiments, this exhaust gas post-treatment device can comprise leg-of-mutton shape.In certain embodiments, this exhaust gas post-treatment device can comprise square shape.

In certain embodiments, this exhaust after treatment system can comprise reducing agent delivery system, this reducing agent delivery system has reducing agent injection syringe, and this reducing agent injection syringe is arranged to exhaust passage reducing agent (such as urea or ammonia) being injected first group of guide plate and second group of guide plate upstream.

In certain embodiments, exhaust after treatment system can comprise reducing agent delivery system, this reducing agent delivery system comprises the first reducing agent injection syringe and the second reducing agent injection syringe, and this first reducing agent injection syringe and this second reducing agent injection syringe are arranged to this exhaust passage reducing agent being injected this first group of guide plate and this second group of guide plate upstream.

In certain embodiments, housing can comprise the first port and the second port, and reducing agent injects housing by this first port and this second port accordingly from the first reducing agent injection syringe and the second reducing agent injection syringe.This first port and this second port can be arranged to relative to this first group of guide plate and this second group of guide plate and make the major part of the reducing agent injected by this first port flow through this first group of guide plate, and flow through this second group of guide plate by the major part of the reducing agent of this second port injection.

In certain embodiments, mixer can comprise the 3rd group of guide plate, 3rd group of baffle arrangement is in this housing and be relative to each other arranged to and guide fluid to flow through the 3rd group of guide plate to form the 3rd pair of eddy current, and the 3rd pair of eddy current relative to each other rotates in the opposite direction.

In certain embodiments, this first group of guide plate, this second group of guide plate and the 3rd group of guide plate can be rotational symmetric about this longitudinal axis each other.

In certain embodiments, this housing can comprise the first port, the second port and the 3rd port, this first port, this second port and the 3rd port are arranged to relative to this first group of guide plate, this second group of guide plate and the 3rd group of guide plate and make the major part of the reducing agent injected by this first port flow through this first group of guide plate, the major part of the reducing agent injected by this second port flows through this second group of guide plate, and flows through the 3rd group of guide plate by the major part of the reducing agent of the 3rd port injection.

In certain embodiments, this mixer can comprise the 4th group of guide plate, 4th group of baffle arrangement is in this housing and be relative to each other arranged to and guide fluid to flow through the 4th group of guide plate to form the 4th pair of eddy current, and the 4th pair of eddy current relative to each other rotates in the opposite direction.

In certain embodiments, this first group of guide plate, this second group of guide plate, the 3rd group of guide plate and the 4th group of guide plate can be rotational symmetric about this longitudinal axis each other.

In certain embodiments, this housing can comprise the first port, second port, 3rd port and the 4th port, this first port, this second port, 3rd port and the 4th port are relative to this first group of guide plate, this second group of guide plate, 3rd group of guide plate and the 4th group of guide plate are arranged to and make the major part of the reducing agent injected by this first port flow through this first group of guide plate, the major part of the reducing agent injected by this second port flows through this second group of guide plate, the major part of the reducing agent injected by the 3rd port flows through the 3rd group of guide plate, and the major part of the reducing agent injected by the 4th port flows through the 4th group of guide plate.

In certain embodiments, this first group of guide plate and this second group of guide plate can comprise multiple plate separately, and the longitudinal axis that these plates are parallel to this housing extends and comprises multiple contact pin separately, and these contact pin are angled relative to this plate and this longitudinal axis.

In certain embodiments, the plurality of contact pin separately of the plurality of plate can comprise multiple first contact pin and multiple second contact pin, these first contact pin extend from the first side of respective plate with first direction, and these second contact pin extend from the second contrary side of respective plate with second direction.

In certain embodiments, this housing can be the component of tubulose generally.

This disclosure provides a kind of mixer for exhaust after treatment system in another form, and this mixer can comprise housing and first group of guide plate and second group of guide plate.This first group of guide plate can be arranged in this housing and can be arranged to generation first to the eddy current relatively rotated.This second group of guide plate can be arranged in this housing and can be arranged to generation second to the eddy current relatively rotated.This first group of guide plate and this second group of guide plate can be arrange with the circular array of the longitudinal axis around this housing.

In certain embodiments, this mixer can comprise the 3rd group of guide plate, and the 3rd group of baffle arrangement is in this housing and be arranged to generation the 3rd to the eddy current relatively rotated.

In certain embodiments, circular array can comprise the 3rd group of guide plate.

In certain embodiments, this mixer can comprise the 4th group of guide plate, and the 4th group of baffle arrangement is in this housing and be arranged to generation the 4th to the eddy current relatively rotated.

In certain embodiments, circular array can comprise the 4th group of guide plate.

In certain embodiments, this mixer can comprise the 5th group of guide plate, the 5th group of guide plate to center on this longitudinal axis and by this first group of guide plate, this second group of guide plate, the 3rd group of guide plate and the 4th group of guide plate around.

In certain embodiments, some or all in this first group of guide plate, this second group of guide plate, the 3rd group of guide plate and the 4th group of guide plate are directed differently from one another in rotation.

In certain embodiments, this first group of guide plate and this second group of guide plate can accordingly by first collar and second collar around.

In certain embodiments, this first collar and this second collar can comprise the first longitudinal axis and the second longitudinal axis accordingly, and this first longitudinal axis and this second longitudinal axis are relative to each other and be angled relative to the longitudinal axis of this housing.This orientation of this first group of guide plate and this second group of guide plate can impel fluid to flow in the corner of non-circular SCR (selective catalytic reduction) catalyzer or other after-treatment devices.

Other Applicable scope will be known from description provided in this article.Explanation in this general introduction and instantiation are only intended to for the object of showing and the scope of this disclosure of not intended to be limiting.

Accompanying drawing explanation

Accompanying drawing described here be only for selected embodiment instead of to the illustrative object of likely embodiment, and be not intended to the scope limiting this disclosure.

Fig. 1 has according to the vent systems of the after-treatment system of this disclosure principle and schematically showing of motor;

Fig. 2 is the perspective view of the mixer of Fig. 1 after-treatment system of principle according to this disclosure;

Fig. 3 is another perspective view of the mixer of Fig. 2;

Fig. 4 is the cross sectional view of mixer;

Fig. 5 is the planimetric map of mixer, illustrates the sense of rotation of the eddy current that mixer produces when fluid wears its flowing;

Fig. 6 is the perspective view of another mixer according to this disclosure principle;

Fig. 7 is another perspective view of the mixer of Fig. 6;

Fig. 8 is the cross sectional view of Fig. 6 mixer;

Fig. 9 is the planimetric map of Fig. 6 mixer, illustrates the sense of rotation of the eddy current that mixer produces when fluid wears its flowing;

Figure 10 is the perspective view of another mixer according to this disclosure principle;

Figure 11 is another perspective view of the mixer of Figure 10;

Figure 12 is the cross sectional view of the mixer of Figure 10;

Figure 13 is the planimetric map of Figure 10 mixer, illustrates the sense of rotation of the eddy current that mixer produces when fluid wears its flowing;

Figure 14 is according to this disclosure principle, the perspective view with another mixer of many group guide plates;

Figure 15 is the perspective view of one group of guide plate in these group guide plates of the mixer of Figure 14;

Figure 16 is another perspective view of this group guide plate of Figure 15; And

Figure 17 is the planimetric map of this group guide plate of Figure 15, illustrates the sense of rotation of the eddy current that this group guide plate produces when fluid wears its flowing.

In each view of accompanying drawing, corresponding reference number represents corresponding part.

Embodiment

More fully exemplary embodiment is described referring now to accompanying drawing.

Provide multiple exemplary embodiment thus make this disclosure be detailed, and its scope is informed those skilled in the art fully.Many specific details are set forth, such as the example of specific parts, apparatus and method, to provide the detailed understanding of the embodiment to this disclosure.Specific details need not be adopted apparently to one skilled in the art, and can by multiple different form exemplifying embodiment embodiment and these specific details all to should not be construed as be the restriction of scope to this disclosure.In some exemplary embodiments, do not have to describe process, the apparatus structure known and the technology known known in detail.

Term as used herein is only be not intended to restriction for the object describing certain exemplary embodiments.As used herein, singulative " ", " one " and " being somebody's turn to do " can be intended to also comprise plural form, unless context clearly indicates in addition.Term " comprises ", " containing ", " comprising " and " having " are all comprising property and therefore specify institute's features set forth, integrate thing, step, the existence of operation, element and/or parts, but do not get rid of and there are or add one or more other features, integrate thing, step, operation, element, parts and/or their set.These method steps described herein, process and operation should not be interpreted as necessarily requiring they by the particular order discussing or show perform, execution sequence unless otherwise indicated.It will also be appreciated that and can adopt extra or substituting step.

When an element or layer relate to " ... on ", " joining to ", " being attached to ", " being connected to " or " being connected to " another element or layer time, it can be directly on this another element or layer, engage, be attached, connect or be connected to this another element or layer, or intermediary element or layer can be there is.By contrast, when an element relate to " directly exist ... on ", " directly joining to ", " being directly attached to ", " being directly connected to " or " being directly connected to " another element or layer time, just may not there is intermediary element or layer.Should make an explanation in a similar fashion for describing other words of relation between these elements (such as, " between " and " directly ", " adjacent " and " direct neighbor " etc.).As used herein, term "and/or" comprises one or more any and all combinations of the Listed Items be associated.

Although term " first ", " second ", " the 3rd " etc. can be used for describing different elements, parts, parts group, region, layer and/or part in this article, these elements, parts, parts group, region, layer and/or part should by the restrictions of these terms.These terms can only for distinguishing another element, parts, parts group, region, layer or part from an element, parts, parts group, region, layer or part.Term as do not imply when " first ", " second " and other numerical terms use herein sequence or order, unless the context clearly.Therefore, the first element discussed hereinafter, parts, region, layer or part can be called as the second element, parts, region, layer or part, and do not depart from the instruction of these exemplary embodiments.

Space correlation term, such as " interior ", " outward ", " under ", " below ", " bottom ", " top ", " top " etc., and direction term, such as " upwards ", " downwards ", " clockwise ", " counterclockwise " etc. be in this article in order to make to as in these accompanying drawings an element showing or feature be easy to explaination relative to the description of the relation of another one or multiple element or one or more feature.Space correlation term can be intended to contain except the orientation be described in the drawings, device different orientation in use or operation.Such as, if device is reversed in the drawings, be then described to " below " or " under " element or feature will be oriented in other elements or feature " top ".Therefore, exemplary term " below " can comprise above and below two kinds of orientations.This device can by addition directed (90-degree rotation or in other orientations), and space correlation descriptor used herein has made corresponding explanation.

With reference to Fig. 1, provide exhaust after treatment system 10, this exhaust after treatment system can comprise exhaust passage 12, reducing agent delivery system 14, after-treatment device 16 and mixer 18.Exhaust passage 12 can receive the exhaust of discharging from combustion engine 20.The exhaust be discharged in exhaust passage 12 can flow through mixer 18 and after-treatment device 16 before being disposed to atmosphere environment.Reducing agent (such as urea or ammonia) can be pumped to one or more reducing agent injection syringe 24 from storage tank 22 by reducing agent delivery system 14, and reducing agent can spray among exhaust stream at mixer 18 place or in this mixer upstream by this one or more reducing agent injection syringe.Mixer 18 can make reducing agent mix with exhaust, thus provides the mixture of more uniform reducing agent and exhaust before mixture enters after-treatment device 16.

After-treatment device 16 can be such as SCR (selective catalytic reduction) catalyst converter.Conversion of nitrogen oxides in being vented can be such as nitrogen (N by the reaction between reducing agent and after-treatment device 16 ₂), water and/or carbon dioxide.After-treatment device 16 can have any suitable shape, such as round-shaped (as shown in Figure 5), triangular shaped (as shown in Figure 9) or rectangle or square shape (as shown in Figure 13).

Referring now to Fig. 2 to Fig. 5, mixer 18 can comprise housing 26, first group of guide plate 27 and second group of guide plate 28.Housing 26 can be the component of tubulose generally, has longitudinal axis A and the first injection syringe port and the second injection syringe port 30,32.The first injection syringe port and the second injection syringe port 30,32 can be arranged between the upstream termination 33 of housing 26 and the downstream end 35 of housing 26.Each injection syringe port 30,32 can receive a reducing agent injection syringe (as schematically shown in the diagram) corresponding in reducing agent injection syringe 24.Reducing agent injection syringe 24 can in the upstream of first group of guide plate and second group of guide plate 27,28 by reducing agent injecting mixer 18.Although injection syringe 24 is shown as in the drawings on the direction that is positioned at perpendicular to flow direction of exhaust gases and sprays into reducing agent, in certain embodiments, injection syringe 24 and injection syringe port 30,32 can be angularly locate relative to the direction of exhaust air flow.It should be understood that injection syringe 24 and injection syringe port 30,32 can be located with any position or with any orientation.

First group of guide plate 27 can comprise the first half or the part 37 of the first plate and the second plate the 34,36 and the 3rd plate 38.Second group of guide plate 28 can comprise the second half or the part 43 of the 4th plate and the 5th plate the 39,41 and the 3rd plate 38.First plate, the second plate, the 4th plate and the 5th plate 34,36,39,41 can be parallel to each other generally and can be parallel to the longitudinal axis A of housing 26.3rd plate 38 can be parallel to the first plate, the second plate, the 4th plate and the 5th plate 34,36,39,41 generally and can longitudinally extend by axis A.Such as, the lateral end of the first plate, the second plate, the 3rd plate, the 4th plate and the 5th plate 34,36,38,39,41 can be attached on housing 26 by any suitable means (such as welding, fastening piece and/or interference fit) with fixing.Such as, in certain embodiments, the lateral end of plate 34,36,38,39,41 can comprise and extending up or down and the supporting leg (not shown) of the internal diameter of engage 26 from it.These supporting legs can be such as soldered or otherwise join to on the internal diameter of housing 26.

First plate 34 can comprise upstream termination 40, downstream end 42, multiple otch 44 (illustrating best in figure 3), multiple first guide plate 46, multiple second guide plate 48 and one or more 3rd guide plate 50.These otch 44 and the first guide plate 46 can be arranged between upstream termination and downstream end 40,42.First guide plate 46 can partly cut or impress out the first plate 34 (forming otch 44 thus) and angled relative to the first plate 34 (reference system relative to Fig. 2 to Fig. 5) is bent upwards.In this way, when fluid flows to downstream end 35 from upstream termination 33 through housing 26, the first guide plate 46 can make fluid deflect down through otch 44.

Second guide plate 48 can be arranged in downstream end 42 place of the first plate 34 or the downstream end of contiguous first plate, and can extend from the downstream end 35 of the first plate 34 downwards and towards housing 26.3rd guide plate 50 can be arranged in downstream end 42 place of the first plate 34 or the downstream end of contiguous first plate, and between the second guide plate 48.3rd guide plate 50 can extend from the downstream end 35 of the first plate 34 upwards and towards housing 26.3rd guide plate 50 can comprise the slit 52 be formed in wherein.When fluid flows to downstream end 35 from upstream termination 33 through housing 26, fluid can be made to deflect down for the second guide plate 48 and the 3rd guide plate 50 can make fluid upward deflect.

Second plate 36 can be substantially similar to the first plate 34 and can comprise upstream termination 54, downstream end 56, multiple otch 58 (illustrating best in figure 3), multiple first guide plate 60, multiple second guide plate 62 and one or more 3rd guide plate 64.Otch 58 can be similar to guide plate 60,62,64 or with the otch 44 of the first plate 34 and guide plate 46,48,50 identical, and therefore will to be not described in detail.

3rd plate 38 can comprise upstream termination 66 and downstream end 68.The first portion 37 of the 3rd plate 38 can comprise multiple otch 70, multiple first guide plate 72 and second guide plate 74.These otch 70 and the first guide plate 72 can be arranged between upstream termination and downstream end 66,68.First guide plate 72 can partly cut or impress out the 3rd plate 38 (forming otch 70 thus) and angled relative to the 3rd plate 38 (reference system relative to Fig. 2 to Fig. 5) is bent downwardly.In this way, when fluid flows to downstream end 35 from upstream termination 33 through housing 26, the first guide plate 72 can make fluid upward deflect through otch 70.

Second guide plate 74 can be arranged in downstream end 42 place of the 3rd plate 38 or the downstream end of contiguous 3rd plate, and can extend from the downstream end 35 of the 3rd plate 38 upwards and towards housing 26.When fluid flows to downstream end 35 from upstream termination 33 through housing 26, the second guide plate 74 can make total fluid up deflects.

Second group of guide plate 28 can be similar to or be equal to first group of guide plate 27, locates with leaving 180 degree except second group of guide plate 28 can rotate from first group of guide plate 28.That is, first group of guide plate and second group of guide plate 27,28 can be rotational symmetric about longitudinal axis A each other.Because the second portion 43 of the 3rd plate 38 is substantially similar to first portion 37, and the 4th plate and the 5th plate 39,41 are similar to the second plate and the first plate 36,34 substantially respectively, will be not described in detail second portion 43 and the 4th plate and the 5th plate 39,41.In brief, second portion 43 can comprise multiple otch 76, the multiple guide plates 78 upwards extended and the multiple guide plates 80 to downward-extension.4th plate 39 can comprise multiple otch 82, multiple first guide plates 84 to downward-extension, multiple second guide plate 86 upwards extended and multiple 3rd guide plates 88 to downward-extension.5th plate 41 can comprise multiple otch 90, multiple first guide plates 92 to downward-extension, multiple second guide plate 94 upwards extended and multiple 3rd guide plates 96 to downward-extension.

Continue referring to figs. 1 through Fig. 5, will the operation of system 10 be described in detail.At the run duration of motor 20, be vented and enter exhaust passage 12 from motor 20 and flow through mixer 18.When exhaust stream is through mixer 18, reducing agent (such as by injection syringe port 30,32) can be infused in the exhaust stream of first group of guide plate and second group of guide plate 27,28 upstream by reducing agent delivery system 14.By flowing through first group of guide plate and second group of guide plate 27,28, reducing agent mixes with exhaust gradually, and make when mixture flows into after-treatment device 16, reducing agent distributes more equably in exhaust.

As shown in Figure 5, first group of guide plate and second group of guide plate 27,28 cause the fluid wearing its flowing to form first pair of eddy current and second pair of eddy current.That is, first group of guide plate 27 can produce the first eddy current V1 rotated in the counterclockwise direction and the second eddy current V2 rotated in the clockwise direction.Second group of guide plate 28 can produce the 3rd eddy current V3 rotated in the clockwise direction and the 4th eddy current V4 rotated in the counterclockwise direction.First eddy current and second eddy current V1, V2 can arrange abreast each other and generally arrange higher than the 3rd plate 38.The arrangement of the 3rd eddy current and the 4th eddy current V3, V4 can be rotational symmetric about longitudinal axis A with the arrangement of the first eddy current and second eddy current V1, V2.

By producing two to eddy current V1, V2, V3, V4 of relatively rotating, mixer 18 just can improve the overall uniformity (flow velocity namely through the upstream face of after-treatment device 16 can be more even) of the fluid flow pattern at the upstream face place at after-treatment device 16.That there is provided two can make mixer 18 downstream to the eddy current relatively rotated (instead of eddy current of only independent a pair relative rotation), that eddy current V1, V2, V3, V4 may dissipate thereon before flowing through after-treatment device 16 distance reduces.The configuration of first group of guide plate and second group of guide plate 27,28 can be not only useful especially when being combined with the after-treatment device 16 with circular cross section (as shown in Figure 5), and also can be useful when using with the after-treatment device with any other shape.

As mentioned above, mixer 18 can comprise a pair injection syringe 24, and this injects reducing agent to injection syringe by injection port 30,32.In this way, each injection syringe port 30,32 can allow the air-flow of correspondence a pair eddy current reducing agent being injected eddy current V1, V2, V3, V4 that these rotate relatively.In certain embodiments, the major part of the reducing agent injected by the first injection syringe port 30 can flow through first group of guide plate 27, and can flow through second group of guide plate 28 by the major part of the reducing agent of the second injection syringe port 32 injection.Having the multiple injection syringes 24 corresponding to one group of specific guide plate 27,28 separately can be useful especially for large diameter mixer (such as having the mixer of 12 ft diams), because the injection syringe 24 that correspondence often organizes guide plate can provide more equally distributed reducing agent within an exhaust-gas stream.

With reference to Fig. 6 to Fig. 9, provide and can replace mixer 18 and another mixer 118 of being attached in system 10.Mixer 118 can comprise housing 126, first group of guide plate 127, second group of guide plate 128, the 3rd group of guide plate 129 and center mixer 130.First group of guide plate, second group of guide plate and the 3rd group of guide plate 127,128,129 can be arranged to the circular array of the longitudinal axis A around housing 126, thus the guide plate making to close on group be spaced apart from each other 120 degree.Namely, first group of guide plate, second group of guide plate and the 3rd group of guide plate 127,128,129 can be equally distributed about longitudinal axis A, thus make first group of guide plate, second group of guide plate and the 3rd group of guide plate 127,128,129 form rotational symmetric pattern about longitudinal axis A.

Housing 126 can be the component of tubulose, comprises the first injection port, the second injection port and the 3rd injection port 131,132,133.First injection port, the second injection port and the 3rd injection port 131,132,133 can accordingly with first group of guide plate, second group of guide plate and the 3rd group of guide plate 127,128,129 rotation into alignment.As mentioned above, reducing agent injection syringe 24 can be received in corresponding injection port 131,132,133.Although injection syringe port one 31,132,133 is shown as in the drawings be positioned such that these injection syringes 24 are spraying into reducing agent perpendicular on the direction of flow direction of exhaust gases, but in certain embodiments, injection syringe 24 and injection syringe port one 31,132,133 can be angularly locate relative to the direction of exhaust air flow.It should be understood that injection syringe 24 and injection syringe port one 31,132,133 can be located with any position or with any orientation.

First group of guide plate, second group of guide plate and the 3rd group of guide plate 127,128,129 can be substantially similar each other and can comprise the first parallel generally plate and the second plate 134,136 separately.First plate 134 can comprise upstream termination 138, downstream end 140, multiple otch 142, multiple first guide plate 144, multiple second guide plate 146 and the 3rd guide plate 148.These otch 142 and the first guide plate 144 can be arranged between upstream termination and downstream end 138,140.First guide plate 144 can partly cut or impress out the first plate 134 (forming otch 142 thus) and be bent outwardly, and makes the inner diameter surface (namely away from longitudinal axis) of the first guide plate 144 angularly from the first plate 134 towards housing 126 and extends towards upstream termination 138.In this way, when fluid flows to downstream end 140 from upstream termination 138 through housing 126, the first guide plate 144 can make fluid deflect through otch 142 towards the second plate 136.

Second guide plate 146 can be arranged in downstream end 140 place of the first plate 134 or the downstream end of contiguous first plate, and can extend from the first plate 134 towards longitudinal axis A and towards the downstream end of housing 126.3rd guide plate 148 can be arranged in downstream end 140 place of the first plate 134 or the downstream end of contiguous first plate, and between the second guide plate 146.3rd guide plate 148 can the inner diameter surface (namely away from longitudinal axis A) from the first plate 134 towards housing 126 and the downstream end towards housing 126 extend.3rd guide plate 148 can comprise the slit 150 be formed in wherein.When fluid flows through housing 126, fluid can be made towards longitudinal axis A deflection for the second guide plate 146 and the 3rd guide plate 148 can make fluid deflector away from longitudinal axis A.

Second plate 136 can comprise upstream termination 152, downstream end 154, multiple otch 156, multiple first guide plate 158 and the second guide plate 160.These otch 156 and the first guide plate 158 can be arranged between upstream termination and downstream end 152,154.First guide plate 158 can partly cut or impress out the second plate 136 (forming otch 156 thus) and be bent outwardly, and makes the inner diameter surface (namely away from longitudinal axis) of the first guide plate 158 angularly from the second plate 136 towards housing 126 and extends towards upstream termination 152.In this way, when fluid flows to downstream end 154 from upstream termination 152 through housing 126, the first guide plate 158 can make fluid deflect through otch 156 towards center mixer 130.Second guide plate 160 can be arranged in downstream end 154 place of the second plate 136 or the downstream end of contiguous second plate, and can extend from the second plate 136 away from longitudinal axis A and towards the downstream end of housing 126.Second guide plate 160 can be arranged between the second guide plate 146 of the first plate 134.Second guide plate 160 can comprise the slit 162 be formed in wherein.When fluid flows through housing 126, the second guide plate 160 can make fluid deflector away from longitudinal axis A.

Center mixer 130 can comprise the collar 164 and multiple central guide plate 166.The collar 164 can be placed in the middle on a longitudinal axis a and can engage the second plate 136 of first group of guide plate, second group of guide plate and the 3rd group of guide plate 127,128,129.Central authorities' guide plate 166 can be arranged in the collar 164 and can to comprise the multiple arc plates arranged around longitudinal axis A.Central authorities' guide plate 166 can give vortex motion to the fluid flowing through the collar 164.In certain embodiments, central guide plate 166 can be S shape generally.

Continue with reference to Fig. 6 to Fig. 9, will the operation of mixer 118 be described in detail.As mentioned above, reducing agent (such as through injection syringe port one 31,132,133) can be infused in the exhaust stream of one group of guide plate, second group of guide plate and the 3rd group of guide plate 127,128,129 upstream by reducing agent delivery system 14.By flowing through first group of guide plate, second group of guide plate and the 3rd group of guide plate 127,128,129, reducing agent mixes with exhaust gradually, and make when mixture flows into after-treatment device 16, reducing agent distributes more equably in exhaust.

As shown in Figure 9, first group of guide plate, second group of guide plate and the 3rd group of guide plate 127,128,129 cause the fluid wearing its flowing to form first pair of eddy current, second pair of eddy current and the 3rd pair of eddy current.That is, first group of guide plate 127 can produce the first eddy current V1 rotated in the counterclockwise direction and the second eddy current V2 rotated in the clockwise direction.Second group of guide plate 128 can produce the 3rd eddy current V3 rotated in the clockwise direction and the 4th eddy current V4 rotated in the counterclockwise direction.Similarly, the 3rd group of guide plate 129 can produce the 5th eddy current V5 rotated in the clockwise direction and the 6th eddy current V6 rotated in the counterclockwise direction.First eddy current and second eddy current V1, V2 can arrange each other abreast.The arrangement of the 3rd eddy current and the 4th eddy current V3, V4 can be rotational symmetric about longitudinal axis A with the arrangement of the first eddy current and second eddy current V1, V2.Similarly, the arrangement of the 5th eddy current and the 6th eddy current V5, V6 can be rotational symmetric about longitudinal axis A with the arrangement of the first eddy current and second eddy current V1, V2.

By producing three to eddy current V1, V2, V3, V4, V5, V6 of relatively rotating, mixer 118 just can improve the overall uniformity (flow velocity namely through the upstream face of after-treatment device 16 can be more even) of the fluid flow pattern at the upstream face place at after-treatment device 16.That there is provided three can make mixer 118 downstream to the eddy current relatively rotated (instead of eddy current of only independent a pair relative rotation), that eddy current V1, V2, V3, V4, V5, V6 may dissipate thereon before flowing through after-treatment device 16 distance reduces.This configuration of first group of guide plate, second group of guide plate and the 3rd group of guide plate 127,128,129 can be not only useful especially when being combined with the after-treatment device 16 with triangular cross section (as shown in Figure 9), and also can be useful when using with the after-treatment device with any other shape.Such as, when using together with there is the after-treatment device 16 of non-circular shape (such as triangular shaped), such as, eddy current V1, V2, V3, V4, V5, V6 of these right relative rotations can force the mixture of exhaust and reducing agent to enter in the corner of after-treatment device 16.

As mentioned above, mixer 118 can comprise multiple injection syringe 24, and these injection syringes inject reducing agent by injection port 131,132,133.In this way, each injection port 131,132,133 can allow reducing agent to be injected these corresponding a pair air-flows of eddy current V1, V2, V3, V4, V5, V6 relatively rotated.In certain embodiments, the major part of the reducing agent injected by the first injection syringe port one 31 can flow through first group of guide plate 127, the major part of the reducing agent injected by the second injection syringe port one 32 can flow through second group of guide plate 128, and can flow through the 3rd group of guide plate 129 by the major part of the reducing agent of the 3rd injection syringe port one 33 injection.Having the multiple injection syringes 24 corresponding to one group of specific guide plate 127,128,129 separately can be useful especially for large diameter mixer (such as having the mixer of 12 ft diams), because the injection syringe 24 that correspondence often organizes guide plate can provide more equally distributed reducing agent within an exhaust-gas stream.

With reference to Figure 10 to Figure 13, provide and can replace mixer 18 and another mixer 218 of being attached in system 10.Mixer 218 can comprise housing 226, first group of guide plate 227, second group of guide plate 228, the 3rd group of guide plate 229, the 4th group of guide plate 230 and center mixer 231.First group of guide plate, second group of guide plate, the 3rd group of guide plate and the 4th group of guide plate 227,228,229,230 can be arranged to the circular array of the longitudinal axis A around housing 226, thus the guide plate making to close on group be spaced apart from each other 90 degree.Namely, first group of guide plate, second group of guide plate, the 3rd group of guide plate and the 4th group of guide plate 227,228,229,230 can be equally distributed about longitudinal axis A, thus make first group of guide plate, second group of guide plate, the 3rd group of guide plate and the 4th group of guide plate 227,228,229,230 form rotational symmetric pattern about longitudinal axis A.

Housing 226 can be the component of tubulose, comprises four injection ports 232.Injection port 232 separately can be corresponding to first group of guide plate, second group of guide plate, the 3rd group of guide plate and the 4th group of guide plate 227,228,229,230 one group of rotation into alignment.As mentioned above, corresponding reducing agent injection syringe 24 can be received in these injection ports 232.Although injection syringe port 232 is shown as in the drawings be positioned such that these injection syringes 24 are spraying into reducing agent perpendicular on the direction of flow direction of exhaust gases, but in certain embodiments, injection syringe 24 and injection syringe port 232 can be angularly locate relative to the direction of exhaust air flow.It should be understood that injection syringe 24 and injection syringe port 232 can be located with any position or with any orientation.

First group of guide plate, second group of guide plate, the 3rd group of guide plate and the 4th group of guide plate 227,228,229,230 can be substantially similar each other and can comprise the first parallel generally plate and the second plate 234,236 separately.First plate 234 can comprise upstream termination 238, downstream end 240, multiple otch 242, multiple first guide plate 244, multiple second guide plate 246 and the 3rd guide plate 248.These otch 242 and the first guide plate 244 can be arranged between upstream termination and downstream end 238,240.First guide plate 244 can partly cut or impress out the first plate 234 (forming otch 242 thus) and be bent outwardly, and makes the inner diameter surface (namely away from longitudinal axis) of the first guide plate 244 angularly from the first plate 234 towards housing 226 and extends towards upstream termination 238.In this way, when fluid flows to downstream end 240 from upstream termination 238 through housing 226, the first guide plate 244 can make fluid deflect through otch 242 towards the second plate 236.

Second guide plate 246 can be arranged in downstream end 240 place of the first plate 234 or the downstream end of contiguous first plate, and can extend from the first plate 234 towards longitudinal axis A and towards the downstream end of housing 226.3rd guide plate 248 can be arranged in downstream end 240 place of the first plate 234 or the downstream end of contiguous first plate, and between the second guide plate 246.3rd guide plate 248 can the inner diameter surface (namely away from longitudinal axis A) from the first plate 234 towards housing 226 and the downstream end towards housing 226 extend.3rd guide plate 248 can comprise the slit 250 be formed in wherein.When fluid flows through housing 226, fluid can be made towards longitudinal axis A deflection for the second guide plate 246 and the 3rd guide plate 248 can make fluid deflector away from longitudinal axis A.

Second plate 236 can comprise upstream termination 252, downstream end 254, multiple otch 256, multiple first guide plate 258 and the second guide plate 260.These otch 256 and the first guide plate 258 can be arranged between upstream termination and downstream end 252,254.First guide plate 258 can partly cut or impress out the second plate 236 (forming otch 256 thus) and be bent outwardly, and makes the inner diameter surface (namely away from longitudinal axis) of the first guide plate 258 angularly from the second plate 236 towards housing 226 and extends towards upstream termination 252.In this way, when fluid flows to downstream end 254 from upstream termination 252 through housing 226, the first guide plate 258 can make fluid deflect through otch 256 towards center mixer 231.Second guide plate 260 can be arranged in downstream end 254 place of the second plate 236 or the downstream end of contiguous second plate, and can extend from the second plate 236 away from longitudinal axis A and towards the downstream end of housing 226.Second guide plate 260 can be arranged between the second guide plate 246 of the first plate 234.Second guide plate 260 can comprise the slit 262 be formed in wherein.When fluid flows through housing 226, the second guide plate 260 can make fluid deflector away from longitudinal axis A.

Center mixer 231 can comprise multiple central guide plate 266, and these central guide plates engage with the second plate 236 of first group of guide plate, second group of guide plate, the 3rd group of guide plate and the 4th group of guide plate 227,228,229,230.Central authorities' guide plate 266 can comprise the multiple arc plates arranged around longitudinal axis A.Central authorities' guide plate 266 convection current can give vortex motion via the fluid in the space of the second plate 236 demarcation of first group of guide plate, second group of guide plate, the 3rd group of guide plate and the 4th group of guide plate 227,228,229,230.In certain embodiments, central guide plate 266 can be S shape generally.

Continue with reference to Figure 10 to Figure 13, will the operation of mixer 218 be described in detail.As mentioned above, reducing agent (such as through injection syringe port 232) can be injected the exhaust stream of first group of guide plate, second group of guide plate, the 3rd group of guide plate and the 4th group of guide plate 227,228,229,230 upstream by reducing agent delivery system 14.By flowing through first group of guide plate, second group of guide plate, the 3rd group of guide plate and the 4th group of guide plate 227,228,229,230, reducing agent mixes with exhaust gradually, make when mixture flows into after-treatment device 16, reducing agent distributes more equably in exhaust.

As shown in Figure 13, first group of guide plate, second group of guide plate, the 3rd group of guide plate and the 4th group of guide plate 227,228,229,230 cause the fluid wearing its flowing to form first pair of eddy current, second pair of eddy current, the 3rd pair of eddy current and the 4th pair of eddy current.That is, first group of guide plate 227 can produce the first eddy current V1 rotated in the counterclockwise direction and the second eddy current V2 rotated in the clockwise direction.Second group of guide plate 228 can produce the 3rd eddy current V3 rotated in the clockwise direction and the 4th eddy current V4 rotated in the counterclockwise direction.Similarly, the 3rd group of guide plate 229 can produce the 5th eddy current V5 rotated in the clockwise direction and the 6th eddy current V6 rotated in the counterclockwise direction.4th group of guide plate 230 can produce the 7th eddy current V7 rotated in the clockwise direction and the 8th eddy current V8 rotated in the counterclockwise direction.First eddy current and second eddy current V1, V2 can arrange each other abreast.The arrangement of the 3rd eddy current and the 4th eddy current V3, V4 can be rotational symmetric about longitudinal axis A with the arrangement of the first eddy current and second eddy current V1, V2.Similarly, the arrangement of the 5th eddy current and the 6th eddy current V5, V6 can be rotational symmetric about longitudinal axis A with the arrangement of the first eddy current and second eddy current V1, V2.The arrangement of the 7th eddy current and the 8th eddy current V7, V8 can be rotational symmetric about longitudinal axis A with the arrangement of the first eddy current and second eddy current V1, V2.

By producing four to eddy current V1, V2, V3, V4, V5, V6, V7, V8 of relatively rotating, mixer 218 just can improve the overall uniformity (flow velocity namely through the upstream face of after-treatment device 16 can be more even) of the fluid flow pattern at the upstream face place at after-treatment device 16.That there is provided four can make mixer 218 downstream to the eddy current relatively rotated (instead of eddy current of only independent a pair relative rotation), that eddy current V1, V2, V3, V4, V5, V6, V7, V8 may dissipate thereon before flowing through after-treatment device 16 distance reduces.This configuration of first group of guide plate, second group of guide plate, the 3rd group of guide plate and the 4th group of guide plate 227,228,229,230 can not only being useful especially with having when after-treatment device 16 that is square or rectangular cross section (as shown in Figure 13) is combined, and also can be useful when using with the after-treatment device with any other shape.Such as, when using together with there is the after-treatment device 16 of non-circular shape (such as square or rectangular shape), such as, eddy current V1, V2, V3, V4, V5, V6, V7, V8 of this multipair relative rotation can force the mixture of exhaust and reducing agent to enter in the corner of after-treatment device 16.

As mentioned above, mixer 218 can comprise multiple injection syringe 24, and these injection syringes inject reducing agent by multiple injection port 232.In this way, each injection syringe port 232 can allow reducing agent to be injected in the air-flow of corresponding a pair eddy current in these eddy current V1, V2, V3, V4, V5, V6, V7, V8 relatively rotated.Having the multiple injection syringes 24 corresponding to one group of specific guide plate 227,228,229,230 separately can be useful especially for large diameter mixer (such as having the mixer of 12 ft diams), because the injection syringe 24 that correspondence often organizes guide plate can provide more equally distributed reducing agent within an exhaust-gas stream.

With reference to Figure 14 to Figure 17, provide and can replace mixer 18 and another mixer 318 of being attached in system 10.Mixer 318 can comprise housing 326 and many group guide plates 328.In the specific embodiment shown in Figure 14 to Figure 17, six groups of guide plates 328 arrange with the circular array of the longitudinal axis A1 around housing 326, thus the guide plate making to close on group be spaced apart from each other 60 degree.That is, these six groups of guide plates 328 can be equally distributed about longitudinal axis A1, thus make these six groups of guide plates 328 form rotational symmetric pattern about longitudinal axis A1.7th group of guide plate 328 can on longitudinal axis A1 placed in the middle and can by other six groups of guide plates 328 around.Housing 326 can comprise one or more injection port (not shown), and this one or more injection port can receive corresponding one or more reducing agent injection syringe 24 separately.In certain embodiments, housing 326 can comprise six injection syringe ports and injection syringe 24, and these injection syringe ports and injection syringe correspond to one group of guide plate in these the six groups of guide plates 328 arranged in a circular manner separately.As mentioned above, this arrangement can provide more equally distributed reducing agent within an exhaust-gas stream.

Often organize guide plate 328 can be similar or identical each other and can comprise the collar 330, this collar be around the first plate 332, second plate 334 and multiple median plates 336 of being disposed between the first plate and the second plate 332,334.The first plate, the second plate and median plate 332,334,336 in one group of concrete guide plate 328 can be parallel to each other generally and can by the slit 337 of maintenance in the corresponding collar 330.Each group of guide plate 328 can be oriented to make the longitudinal axis A2 of the collar 330 be arranged essentially parallel to housing 326 longitudinal axis A1 (or when on longitudinal axis A1 the 7th group guide plate 328 of center, the longitudinal axis A2 of the collar 330 can with longitudinal axis A1 conllinear).But in certain embodiments, the longitudinal axis A2 of the collar 330 can relative to longitudinal axis A1 and/or relative to each other angled.

First plate 332 can comprise upstream termination 338, downstream end 340, multiple otch 342 and multiple guide plate 344.These otch 342 and guide plate 344 can be disposed between upstream termination and downstream end 338,340.Guide plate 344 can partly cut or impress out the first plate 332 (forming otch 342 thus) and be bent outwardly, and makes the inner diameter surface of guide plate 344 angularly from the first plate 332 towards the collar 330 (namely away from longitudinal axis A2) and extends towards upstream termination 338.In this way, when fluid flows to downstream end 340 from upstream termination 338 through the collar 330, guide plate 344 can make fluid deflect through otch 342 towards median plate 336.

Second plate 334 can comprise upstream termination 352 (Figure 16), downstream end 354 (Figure 17), multiple otch 356 (Figure 16), multiple first guide plate 358 (Figure 16) and the second guide plate 360 (Figure 15 and Figure 17).These otch 356 and the first guide plate 358 can be arranged between upstream termination and downstream end 352,354.First guide plate 358 can partly cut or impress out the second plate 334 (forming otch 356 thus) and curve inwardly, make the first guide plate 358 angularly from the second plate 334 towards the longitudinal axis A2 of the collar 330 and towards downstream end 254 extend.In this way, when fluid flows to downstream end 254 from upstream termination 252 through the collar 330, the first guide plate 258 can make fluid deflect towards median plate 336.Second guide plate 360 can be arranged in downstream end 354 place of the second plate 334 or the downstream end of contiguous second plate, and can extend from the second plate 334 towards longitudinal axis A2.Second guide plate 360 can comprise the slit 362 be formed in wherein.When fluid flows through the collar 330, the second guide plate 360 can make fluid deflect towards longitudinal axis A2.

Median plate 336 can comprise upstream termination 364, downstream end 366, multiple otch 368, multiple first guide plate 370, multiple second guide plate 372 and the 3rd guide plate 374 separately.These otch 368 and the first guide plate 370 can be arranged between upstream termination and downstream end 364,366.First guide plate 370 can partly cut or impress out median plate 336 (forming otch 368 thus) and bend to and the first guide plate 370 is angularly extended towards upstream termination 364 from median plate 336 towards the first plate 332.In this way, when fluid flows to downstream end 366 from upstream termination 364 through the collar 330, the first guide plate 370 can make fluid deflector pass corresponding otch 368.

Second guide plate 372 can be arranged in downstream end 366 place of median plate 336 or the downstream end of adjacent central plate, and can extend from median plate 336 towards the second plate 334.3rd guide plate 374 can be arranged in downstream end 366 place of median plate 336 or the downstream end of adjacent central plate, and between the second guide plate 372.3rd guide plate 374 can extend from median plate 336 towards the first plate 332.3rd guide plate 374 can comprise the slit 376 be formed in wherein.When fluid flows through the collar 330, the second guide plate 372 can make fluid deflect and the 3rd guide plate 374 can make fluid deflect towards the first plate 332 towards the second plate 334.

Continue with reference to Figure 14 to Figure 17, will the operation of mixer 318 be described in detail.As mentioned above, reducing agent can be injected the exhaust stream of guide plate 328 upstream of these groups by reducing agent delivery system 14.By flowing through the guide plate 328 of these groups, reducing agent mixes with exhaust gradually, and make when mixture flows into after-treatment device 16, reducing agent distributes more equably in exhaust.

As shown in Figure 17, the guide plate 328 of these groups makes the fluid flowing through it form a pair eddy current V1, V2 rotating in the opposite direction separately.By producing seven to eddy current V1, V2 of relatively rotating (namely at each group generation a pair eddy current of these seven groups of guide plates 328), mixer 318 just can improve the overall uniformity (flow velocity namely through the upstream face of after-treatment device 16 can be more even) of the fluid flow pattern at the upstream face place at after-treatment device 16.That there is provided seven can make mixer 318 downstream to the eddy current relatively rotated (instead of eddy current of only independent a pair relative rotation), that eddy current V1, V2 may dissipate thereon before flowing through after-treatment device 16 distance reduces.This configuration of these group guide plates 328 can be combined with the after-treatment device 16 of the cross section with such as circular, square or rectangular cross section or any other shape.

Provide the above description to embodiment for the object of showing and illustrate.It is not intended to exhaustive or disclosed by restriction herein content.The independent element of specific embodiment and feature are not limited to this specific embodiment usually, but can intercourse at where applicable, and may be used in the selected embodiment that even do not illustrate especially and set forth.Also can be changed it with various ways.Such change is not deemed to be and has departed from this disclosure content, and all changes so are all intended to be included within the scope of this disclosure content.

Claims

1. an exhaust after treatment system, comprising:

The exhaust passage of exhaust is received from motor;

Be arranged in the exhaust gas post-treatment device in this exhaust passage; And

Mixer, this mixer is arranged in this exhaust passage, in the upstream of this exhaust gas post-treatment device, this mixer comprises housing, first group of guide plate and second group of guide plate, this first group of baffle arrangement is in this housing and be relative to each other arranged to and guide fluid to flow through this first group of guide plate and form first pair of eddy current, this first pair of eddy current relative to each other rotates in the opposite direction, this second group of baffle arrangement is in this housing and be relative to each other arranged to and guide fluid to flow through this second group of guide plate and form second pair of eddy current, this second pair of eddy current relative to each other rotates in the opposite direction, wherein, this first group of guide plate and this second group of guide plate are that the longitudinal axis each other about this housing is rotational symmetric.

2. exhaust after treatment system as claimed in claim 1, wherein, this exhaust gas post-treatment device comprises catalyzer.

3. exhaust after treatment system as claimed in claim 1, comprise reducing agent delivery system further, this reducing agent delivery system comprises reducing agent injection syringe, and this reducing agent injection syringe is arranged to this exhaust passage reducing agent being injected this first group of guide plate and this second group of guide plate upstream.

4. exhaust after treatment system as claimed in claim 1, comprise reducing agent delivery system further, this reducing agent delivery system comprises the first reducing agent injection syringe and the second reducing agent injection syringe, and this first reducing agent injection syringe and this second reducing agent injection syringe are arranged to this exhaust passage reducing agent being injected this first group of guide plate and this second group of guide plate upstream.

5. exhaust after treatment system as claimed in claim 4, wherein, this housing comprises the first port and the second port, reducing agent injects this housing from this first reducing agent injection syringe and this second reducing agent injection syringe by this first port and this second port accordingly, this first port and this second port are arranged to the reducing agent making to be injected by this first port major part relative to this first group of guide plate and this second group of guide plate flows through this first group of guide plate, and the major part of the reducing agent injected by this second port flows through this second group of guide plate.

6. exhaust after treatment system as claimed in claim 1, wherein, this mixer comprises the 3rd group of guide plate, 3rd group of baffle arrangement is in this housing and be relative to each other arranged to and guide fluid to flow through the 3rd group of guide plate to form the 3rd pair of eddy current, and the 3rd pair of eddy current relative to each other rotates in the opposite direction.

7. exhaust after treatment system as claimed in claim 6, wherein, this first group of guide plate, this second group of guide plate and the 3rd group of guide plate are rotational symmetric about this longitudinal axis each other.

8. exhaust after treatment system as claimed in claim 7, comprise the center mixer centered on this longitudinal axis further, this center mixer comprises multiple guide plate.

9. exhaust after treatment system as claimed in claim 6, wherein, this housing comprises the first port, second port and the 3rd port, this first port, this second port and the 3rd port are relative to this first group of guide plate, this second group of guide plate and the 3rd group of guide plate are arranged to and make the major part of the reducing agent injected by this first port flow through this first group of guide plate, the major part of the reducing agent injected by this second port flows through this second group of guide plate, and the major part of the reducing agent injected by the 3rd port flows through the 3rd group of guide plate.

10. exhaust after treatment system as claimed in claim 6, wherein, this after-treatment device comprises leg-of-mutton shape.

11. exhaust after treatment system as claimed in claim 6, wherein, this mixer comprises the 4th group of guide plate, 4th group of baffle arrangement is in this housing and be relative to each other arranged to and guide fluid to flow through the 4th group of guide plate to form the 4th pair of eddy current, and the 4th pair of eddy current relative to each other rotates in the opposite direction.

12. exhaust after treatment system as claimed in claim 11, wherein, this first group of guide plate, this second group of guide plate, the 3rd group of guide plate and the 4th group of guide plate are rotational symmetric about this longitudinal axis each other.

13. exhaust after treatment system as claimed in claim 12, comprise the center mixer centered on this longitudinal axis further, this center mixer comprises multiple guide plate.

14. exhaust after treatment system as claimed in claim 11, wherein, this housing comprises the first port, second port, 3rd port and the 4th port, this first port, this second port, 3rd port and the 4th port are relative to this first group of guide plate, this second group of guide plate, 3rd group of guide plate and the 4th group of guide plate are arranged to and make the major part of the reducing agent injected by this first port flow through this first group of guide plate, the major part of the reducing agent injected by this second port flows through this second group of guide plate, the major part of the reducing agent injected by the 3rd port flows through the 3rd group of guide plate, and the major part of the reducing agent injected by the 4th port flows through the 4th group of guide plate.

15. exhaust after treatment system as claimed in claim 11, wherein, this after-treatment device comprises square shape.

16. exhaust after treatment system as claimed in claim 1, wherein, this first group of guide plate and this second group of guide plate comprise multiple plate separately, the longitudinal axis that these plates are parallel to this housing extends and comprises multiple contact pin separately, and these contact pin are angled relative to this plate and this longitudinal axis.

17. exhaust after treatment system as claimed in claim 16, wherein, the plurality of contact pin separately of the plurality of plate comprises multiple first contact pin and multiple second contact pin, these first contact pin extend from the first side of respective plate with first direction, and these second contact pin extend from the second contrary side of respective plate with second direction.

18. exhaust after treatment system as claimed in claim 1, wherein, this housing is the component of tubulose generally.

19. 1 kinds, for the mixer of exhaust after treatment system, comprising:

Housing;

First group of guide plate, this first group of baffle arrangement is in this housing and be relative to each other arranged to and guide fluid to flow through this first group of guide plate and form first pair of eddy current, and this first pair of eddy current relative to each other rotates in the opposite direction; And

Second group of guide plate, this second group of baffle arrangement is in this housing and be relative to each other arranged to and guide fluid to flow through this second group of guide plate and form second pair of eddy current, and this second pair of eddy current relative to each other rotates in the opposite direction;

Wherein, this first group of guide plate and this second group of guide plate are that longitudinal axis each other about this housing is rotational symmetric.

20. mixers as claimed in claim 19, wherein, this housing comprises the first port and the second port, this first port and this second port are arranged to the reducing agent making to be injected by this first port major part relative to this first group of guide plate and this second group of guide plate flows through this first group of guide plate, and flows through this second group of guide plate by the major part of the reducing agent of this second port injection.

21. mixers as claimed in claim 19, comprise the 3rd group of guide plate further, 3rd group of baffle arrangement is in this housing and be relative to each other arranged to and guide fluid to flow through the 3rd group of guide plate to form the 3rd pair of eddy current, and the 3rd pair of eddy current relative to each other rotates in the opposite direction.

22. mixers as claimed in claim 21, wherein, this first group of guide plate, this second group of guide plate and the 3rd group of guide plate are rotational symmetric about this longitudinal axis each other.

23. mixers as claimed in claim 21, wherein, this housing comprises the first port, the second port and the 3rd port, this first port, this second port and the 3rd port are arranged to relative to this first group of guide plate, this second group of guide plate and the 3rd group of guide plate and make the major part of the reducing agent injected by this first port flow through this first group of guide plate, the major part of the reducing agent injected by this second port flows through this second group of guide plate, and flows through the 3rd group of guide plate by the major part of the reducing agent of the 3rd port injection.

24. mixers as claimed in claim 21, comprise the 4th group of guide plate further, 4th group of baffle arrangement is in this housing and be relative to each other arranged to and guide fluid to flow through the 4th group of guide plate to form the 4th pair of eddy current, and the 4th pair of eddy current relative to each other rotates in the opposite direction.

25. mixers as claimed in claim 24, wherein, this first group of guide plate, this second group of guide plate, the 3rd group of guide plate and the 4th group of guide plate are rotational symmetric about this longitudinal axis each other.

26. mixers as claimed in claim 24, wherein, this housing comprises the first port, second port, 3rd port and the 4th port, this first port, this second port, 3rd port and the 4th port are relative to this first group of guide plate, this second group of guide plate, 3rd group of guide plate and the 4th group of guide plate are arranged to and make the major part of the reducing agent injected by this first port flow through this first group of guide plate, the major part of the reducing agent injected by this second port flows through this second group of guide plate, the major part of the reducing agent injected by the 3rd port flows through the 3rd group of guide plate, and the major part of the reducing agent injected by the 4th port flows through the 4th group of guide plate.

27. mixers as claimed in claim 19, wherein, this first group of guide plate and this second group of guide plate comprise multiple plate separately, and the longitudinal axis that these plates are parallel to this housing extends and comprises multiple contact pin separately, and these contact pin are angled relative to this plate and this longitudinal axis.

28. mixers as claimed in claim 27, wherein, the plurality of contact pin separately of the plurality of plate comprises multiple first contact pin and multiple second contact pin, these first contact pin extend from the first side of respective plate with first direction, and these second contact pin extend from the second contrary side of respective plate with second direction.

29. mixers as claimed in claim 19, wherein, this housing is the component of tubulose generally.

30. 1 kinds, for the mixer of exhaust after treatment system, comprising:

Housing;

First group of guide plate, this first group of baffle arrangement is in this housing and be arranged to generation first to the eddy current relatively rotated; And

Second group of guide plate, this second group of baffle arrangement is in this housing and be arranged to generation second to the eddy current relatively rotated;

Wherein, this first group of guide plate and this second group of guide plate arrange with the circular array of the longitudinal axis around this housing.

31. mixers as claimed in claim 30, comprise the 3rd group of guide plate further, and the 3rd group of baffle arrangement is in this housing and be arranged to generation the 3rd to the eddy current relatively rotated.

32. mixers as claimed in claim 31, wherein, this circular array comprises the 3rd group of guide plate.

33. mixers as claimed in claim 31, comprise the 4th group of guide plate further, and the 4th group of baffle arrangement is in this housing and be arranged to generation the 4th to the eddy current relatively rotated.

34. mixers as claimed in claim 33, wherein, this circular array comprises the 4th group of guide plate.

35. mixers as claimed in claim 34, comprise the 5th group of guide plate further, the 5th group of guide plate to center on this longitudinal axis and by this first group of guide plate, this second group of guide plate, the 3rd group of guide plate and the 4th group of guide plate around.

36. mixers as claimed in claim 35, wherein, this first group of guide plate, this second group of guide plate, the 3rd group of guide plate and the 4th group of guide plate are all directed differently from one another in rotation.

37. mixers as claimed in claim 30, wherein, this first group of guide plate and this second group of guide plate accordingly by first collar and second collar around.

38. mixers as claimed in claim 37, wherein, this first collar and this second collar comprise the first longitudinal axis and the second longitudinal axis accordingly, and this first longitudinal axis and this second longitudinal axis are relative to each other and be angled relative to the longitudinal axis of this housing.