CN102439271A - Fluid mixing system - Google Patents

Fluid mixing system Download PDF

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Publication number
CN102439271A
CN102439271A CN2010800232155A CN201080023215A CN102439271A CN 102439271 A CN102439271 A CN 102439271A CN 2010800232155 A CN2010800232155 A CN 2010800232155A CN 201080023215 A CN201080023215 A CN 201080023215A CN 102439271 A CN102439271 A CN 102439271A
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CN
China
Prior art keywords
fluid
pipeline
conduit
fluid stream
mixing system
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Pending
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CN2010800232155A
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Chinese (zh)
Inventor
S·A·法尔康纳
G·M·威新顿
O·巴什
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International Engine Intellectual Property Co LLC
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International Engine Intellectual Property Co LLC
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Application filed by International Engine Intellectual Property Co LLC filed Critical International Engine Intellectual Property Co LLC
Publication of CN102439271A publication Critical patent/CN102439271A/en
Pending legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/17Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system
    • F02M26/19Means for improving the mixing of air and recirculated exhaust gases, e.g. venturis or multiple openings to the intake system

Abstract

A fluid mixing system has a first fluid conduit and a second fluid conduit in fluid communication with the first fluid conduit. The second fluid conduit includes a first tube and a second tube, wherein at least one of the first and second tubes causes a swirling or tumbling fluid flow. The fluid mixing system may be an exhaust gas recirculation system having an air intake conduit and an exhaust gas recirculation conduit, wherein the exhaust gas recirculation conduit causes a swirling or tumbling fluid flow. A method of introducing multiple fluids includes providing a first fluid flow in a conduit, providing a second fluid flow in a first tube, and providing a third fluid flow in a second tube. The second fluid flow is introduced to the first fluid flow at a first entry angle relative to the conduit.

Description

Fluid mixing system
Background technique
Since beginning in 1970, fluid mixing system was used in exhaust gas recirculation (EGR) system, to reduce the discharging in many gas engines and the DENG.In traditional EGR fluid mixing system, the exhaust gas recirculation of motor and combine with gas in the intake manifold.Waste gas drops to the FT of fuel under the formation temperature of nitrogen oxide (Nox) in combustion process in cylinder usually.
Summary of the invention
A kind of fluid mixing system is described.In one embodiment, fluid mixing system has the first fluid conduit and second fluid conduit systems, and this second fluid conduit systems is communicated with the first fluid catheter fluid.Second fluid conduit systems has first pipeline and second pipeline, and first and second ducted at least one generation fluid stream that swirl or that roll.
At least one embodiment provides gas recirculation system, the exhaust gas recirculation conduit that this gas recirculation system has air inlet duct and is communicated with the air inlet duct fluid.This exhaust gas recirculation conduit produces fluid stream that swirl or that roll.
At least one embodiment provides the method for a plurality of fluids of guiding.This method comprises: first fluid stream is provided in conduit, second fluid stream is provided in first pipeline and three-fluid stream is provided in second pipeline.According to this method, with first entering angle second fluid stream is caused first fluid stream with respect to conduit, and with second entering angle three-fluid stream is caused first fluid stream with respect to conduit.First pipeline and second ducted at least one cause corresponding second fluid stream or three-fluid stream to swirl or roll.
Description of drawings
For the ease of more completely understanding example embodiment, referring now to accompanying drawing.It is restrictive that these accompanying drawings should not be considered to, and only be exemplary.
Fig. 1 is the side isometric view of the gas recirculation system of existing technology.
Fig. 2 is the top perspective view of the gas recirculation system of existing technology.
Fig. 3 is the side isometric view according to the fluid mixing system of an example embodiment described herein.
Fig. 4 is the top perspective view according to the fluid mixing system of an example embodiment described herein.
Fig. 5 is the sectional view according to the fluid mixing system of an example embodiment described herein.
Fig. 6 is the chart that the pressure pulse supercharging of gas recirculation system is shown, and wherein three recycle port have been merged into a port.
Fig. 7 is the chart that the pressure pulse supercharging of gas recirculation system is shown, and wherein six recycle port have been merged into a port.
Embodiment
Following illustration is through providing a plurality of specific embodiments and the details that relate to fluid mixing system such as gas recirculation system, passing on the complete understanding for these embodiments.Yet, it should be understood that it only is exemplary specific embodiment and details that the present invention is not limited to these.It will also be appreciated that those of ordinary skill in the art will appreciate that in any amount of alternate embodiment in view of known devices, system and method, the present invention is use and the benefit that realizes its intended purposes.
In traditional egr system, a kind of mode in in a number of ways realizes the mixing of EGR gas and air inlet gas.For example, in a simple design, the EGR gas conduit can form " three-way pipe " with air inlet duct or similarly be connected.Yet in these systems, waste gas and mixing of combustion gases are bad.
Come to improve for the mixing of EGR gas and air inlet gas though proposed various improvement, these improve suitably not mixed these gases.Referring to Fig. 1-2, in always being denoted as an EGR mix design of reference character 100, EGR gas is divided into two air-flows, i.e. first air-flow 110 and second air-flow 120, and each air flow jetting is in the relative sidepiece of admission line 130.In this kind design, EGR gas can be ejected in the admission line 130 two ports that approximately separate 180 degree.Except providing between the gas system the unsuitable mixing, this design extremely is difficult to make.
In various conventional hybrid system, resulting fluid mixture is not to be uniformly, comprises having the higher or lower cave district (pockets) of exhaust gas concentration, area, zone or layering (strata).When waste gas when a side of inlet stream gets into, the distribution meeting of waste gas in air inlet gas is more inhomogeneous.
System compares with traditional mixing, and the system of example embodiment provides improved fluid to mix.In general, the system among these embodiments has a plurality of pipelines, and these pipelines are carried into bigger conduit with fluid.These ducted at least one fluid stream swirled and/or roll, thereby be that fluid provides better mixing in being in bigger conduit the time.In some example embodiment, fluid mixing system can be used for making the uniformity optimization of fluid mixture.Though this paper describes example embodiment with reference to gas recirculation system, it should be understood that these systems can be used in other the gaseous fluid hybrid system.
Referring to Fig. 3-5, in an example embodiment, gas recirculation system 200 comprises a plurality of parallelpipeds 300, and these pipelines are carried into air inlet duct 210 with EGR gas.Air inlet duct 210 has suction port 212 and air outlet 214, and between suction port and air outlet, has passage.Parallelpiped 300 intersects with air inlet duct between suction port 212 and air outlet 214.Conduit 210 can be as required or is required and have any suitable shape or a cross section.Conduit 210 can be processed by any suitable material, for example aluminium, cast iron, stainless steel, plastic material or the like.
In an example embodiment, at least one in the pipeline 300 provides the fluid that swirls or roll stream.Though this paper describes these embodiments with reference to two pipelines 300, it should be understood that can provide more parallelpiped in these embodiments' scope.Hereinafter is described single pipeline 300 in more detail.Under the situation of describing or illustrate a plurality of parallelpipeds (for example 300A, 300B) in combination, similarly reference character is used to describe similar characteristic.
In various embodiments, parallelpiped 300 can be carried into the fluid such as EGR gas air inlet duct 210.In certain embodiments, the one or more portabilities in the parallelpiped 300 substitute or are additional to other gas of EGR gas.In certain embodiments, the identical fluid of each pipeline 300 portability.In other embodiments, pipeline 300 can be carried into conduit 210 with different fluids.For example, in an example embodiment, a pipeline 300A portability EGR gas, and the second pipeline 300B portability cooling air.One or more in the pipeline 300 can be as required or are required and carry other fluid, for example power strengthening agent (power enhancer) or OR compound.
In example embodiment, the body 306 that each parallelpiped 300 can have suction port 302, air outlet 304 and between suction port and air outlet, extend.The suction port 304 of parallelpiped 300 causes air inlet duct 210, makes pipeline 300 be communicated with conduit 210 fluids.Pipeline 300 can be processed by any suitable material, for example aluminium, cast iron, stainless steel, plastic material or the like.In various embodiments, pipeline 300 can be shaped so that these pipelines 300 are integral with conduit 210.In other embodiments, pipeline 300 can be individually formed, and otherwise links with conduit 210.For example, pipeline 300 can be soldered to conduit 210, and pipeline 300 can have corresponding notch/groove or the flange assembly that is fixed together with conduit 210, and pipeline 300 can press fit over together with conduit 210 or adhesion ground is attached together.A plurality of pipelines 300 can form or be individually formed together, and link with conduit 210 together or individually.Can make with some variablees of packaging method based on comprising, as required or require and use other method of binding pipeline 300 and conduit 210.
In various embodiments, each pipeline 300 can have any suitable length.For example, in an example embodiment, pipeline 300 can have about 2 inches to about 10 inches length, this length 304 records to the air outlet from suction port 302.It should be understood that can be based on some variablees as required or require to confirm that the length of pipeline 300, these variablees comprise casting size, requirement of engine pack or the like.In various embodiments, each pipeline 300 can have any suitable diameter and shape of cross section.For example, diameter and cross section can be configured to reduce loss, swirl or roll with generation, perhaps weaken or strengthen turbulent flow.Exemplary cross section for example comprises circle, rectangular or oval-shaped, hourglass shape, J-shaped, U-shaped or the like, and can comprise the combination of these shape of cross sections.In certain embodiments, cross section can as required or require along the length increase or reduce, to reduce or to enlarge the fluid that flows through this cross section.
In example embodiment, at least one in the pipeline 300 is configured to produce the fluid stream that swirls.For example, in various embodiments, at least one distortion in the pipeline 300 is with swirl fluid stream of generation.In other various embodiments, at least one in the pipeline 300 has the in-profile that produces the fluid stream that swirls or structure, baffle plate, blade, projection, fin, rifling or the like.In example embodiment, at least one in the pipeline 300 is configured to produce the fluid stream that rolls.For example, in various embodiments, at least one in the pipeline 300 has the in-profile that produces the fluid stream roll or structure, baffle plate, blade, projection, fin, rifling or the like.In various embodiments, pipeline 300 can produce fluid stream that swirl or that roll after fluid leaves air outlet 304, in pipeline 300, and/or can produce the fluid stream that rolls that swirls.In example embodiment, at least one in the pipeline 300 is configured to produce the fluid stream that rolls that swirls.In one embodiment, pipeline 300 is configured to provide the fluid that swirls and/or roll stream, so that the downstream fluid uniformity of mixture is optimized.
Referring to Fig. 3 and Fig. 4, in an example embodiment, pipeline 300 has distortion along its length between suction port 302 to air outlet 304, and this distortion produces the fluid stream that swirls.Pipeline 300 can have any suitable distortion angle, so that the fluid that swirls stream to be provided.The distortion angle of pipeline 300 can influence the mixed effect of egr system 200.In various embodiments, the distortion in the distortion pipeline 300 can be spent about 90 degree of per inch from per inch about 15, perhaps spends about 45 degree of per inch from per inch about 30.In certain embodiments, a plurality of pipeline 300A, 300B have identical windup-degree.In certain embodiments, a plurality of pipeline 300A, 300B can be around coilings each other.In certain embodiments, comparable another pipeline of pipeline 300A 300B has bigger distortion angle.In certain embodiments, a pipeline 300A can be straight, and the second pipeline 300B can twist.In certain embodiments; One or more among pipeline 300A, the 300B have one or more geometrical shapies; These geometrical shapies through change gas swirl, roll or recirculation influences the mixing of fluid, and these geometrical shapies for example are crooked or folding in the pipeline 300.
In various example embodiment, conduit 210 can be constructed with one or more structures or geometrical shape, these structures or geometrical shape through change conduit 210 inner fluids swirl, roll and/or recirculation influences the mixing of fluid.Conduit 210 can have this paper any with reference in the swirling of describing of pipeline 300 and/or the method and apparatus that rolls.
In various example embodiment, each pipeline 300 ends at for example suction port 304 at bigger conduit 210 places, and this suction port 304 provides the passage between pipeline 300 and the conduit 210.In certain embodiments, the one or more internal surface places that terminate in big conduit 210 in the pipeline 300.Referring to Fig. 5, in certain embodiments, pipeline 300 can exceed the internal surface of big conduit 210 and stop, and makes suction port 304 extend in the conduit 210, and the general sprays EGR gas towards the center line of conduit 210 to a greater degree by this.
In various embodiments, each pipeline 300 can intersect with big conduit 210 as follows, that is, be ejected in the big conduit 210 with the inclusion of predetermined entering angle with smaller conduit 300." entering angle " is to be in measured angle between the center line of the center line of pipeline 300 and big conduit 210 in intersection point, if perhaps conduit 210 bendings are in measured angle between the tangent line of center line and conduit 210 of pipeline 300 in intersection point.In example embodiment, the entering angle of pipeline 300 can be suitable angle.In one embodiment, the entering angle of each distortion pipeline 300 can be spent about 45 degree from about 90.In certain embodiments, entering angle can be in conduit 210 direction of fluid flow equidirectional or towards the opposite direction of this direction of fluid flow, directed along direction perpendicular to direction of fluid flow.In certain embodiments, pipeline 300 can 304 places, air outlet or near have curved part, cause before the conduit 210, change the direction of this fluid with the fluid in pipeline 300 just.In various embodiments, each pipeline 300A, 300B can be along different direction injection airs.In certain embodiments, the entering of each pipeline among pipeline 300A, the 300B can be squinted each other, and with the generation effect that swirls, this can further strengthen the mixing of all fluids.For example, in one embodiment, the entering angle of pipeline 300A can squint with the entering angle of pipeline 300B about 30 the degree.
In example embodiment, pipeline 300 can intersect at any appropriate point place and the conduit along conduit 210.In certain embodiments, two or more pipeline 300A, 300B can intersect at consecutive points place and conduit 210.In other embodiments, two or more pipeline 300A, 300B can intersect at the opposite side and the conduit 210 of conduit.Pipeline 300A, 300B and the corresponding intersection point of conduit 210 can be configured to the pattern of mixing that provides predetermined.In an example embodiment, can the cross-shaped portion place of one or more pipelines 300 or near introducing pressurized air stream or other fluid stream, mix with the fluid of influence at this some place.
In certain embodiments, two or more pipeline 300A, 300B can be merged into the single intermediate conduit that is fed in the conduit 210.Pipeline is merged into intermediate conduit can has influence for the pressure pulse supercharging.For example, Fig. 6 illustrates and has three example pressure pulse superchargings that merge the system of fluid stream.In this embodiment, between middle pressure (horizontal line on the chart) and pressure peak, have difference, this difference makes air-flow can the downstream leaf valve opened and fills material.Comparatively speaking, Fig. 7 illustrates and has six example pressure pulse superchargings that merge the system of fluid stream.In this embodiment, the difference between middle pressure and pressure peak is quite little, and this difference can be not enough to the downstream leaf valve is opened and filled material.In an example embodiment, with as required or require to construct the merging of pipeline and the length of pipeline, so that predetermined pressure pulse supercharging to be provided.
In example embodiment, pipeline 300 and/or air inlet duct 210 can as required or require to have one or more additional devices, and for example nozzle, baffle plate, fin and so on perhaps improve the mixing of fluid with fluid-mixing.
In aforementioned specification, referring to accompanying drawing various embodiments have been described.Yet, under the situation that does not depart from the more wide range that example embodiment set forth in following claim, be conspicuous for various modifications that these embodiments carried out and change and the additional embodiment implemented.Therefore, specification and accompanying drawing should be considered to illustrative and be nonrestrictive.

Claims (42)

1. fluid mixing system comprises:
The first fluid conduit; And
Second fluid conduit systems, said second fluid conduit systems is communicated with said first fluid catheter fluid, and comprises first pipeline and second pipeline;
Wherein, said first and second ducted at least one generation fluid stream that swirl or that roll.
2. fluid mixing system as claimed in claim 1 is characterized in that, swirl and the fluid stream that roll of said first and second ducted at least one generation.
3. fluid mixing system as claimed in claim 1 is characterized in that, said first pipeline has first entering angle with respect to the center line of said first conduit, and said second pipeline has second entering angle with respect to the center line of said first conduit.
4. fluid mixing system as claimed in claim 3 is characterized in that, said first entering angle is different with said second entering angle.
5. fluid mixing system as claimed in claim 3 is characterized in that, said first entering angle is identical with said second entering angle basically.
6. fluid mixing system as claimed in claim 3 is characterized in that, said first entering angle or said second entering angle are being spent in the scope of about 90 degree from about 45.
7. fluid mixing system as claimed in claim 1 is characterized in that, said first pipeline and said second ducted one have the distortion that produces the fluid stream that swirls.
8. fluid mixing system as claimed in claim 7 is characterized in that, said distortion is in the scope of spending about per inch 45 degree from about per inch 30.
9. fluid mixing system as claimed in claim 7 is characterized in that, said first pipeline and said second pipeline all have the distortion that produces the fluid stream that swirls.
10. fluid mixing system as claimed in claim 9 is characterized in that, said first pipeline has the distortion that is different from said second pipeline.
11. fluid mixing system as claimed in claim 1 is characterized in that, said first and second ducted one does not produce the fluid stream that swirls or roll.
12. fluid mixing system as claimed in claim 1 is characterized in that, said first and second ducted at least one have suction port, said suction port extends beyond the internal surface of said air inlet duct.
13. fluid mixing system as claimed in claim 1 is characterized in that, said first pipeline is communicated with identical fluid with said second pipeline.
14. fluid mixing system as claimed in claim 1 is characterized in that, said first pipeline and said second pipeline are communicated with different fluids.
15. fluid mixing system as claimed in claim 1 is characterized in that, said first pipeline or said second pipeline are communicated with a plurality of fluids.
16. fluid mixing system as claimed in claim 1 is characterized in that, said first pipeline and said second ducted at least one have curved part.
17. fluid mixing system as claimed in claim 1 is characterized in that, said first pipeline and said second pipeline before they cause said first conduit, be merged into single combination pipe.
18. fluid mixing system as claimed in claim 1 is characterized in that, said fluid mixing system also comprises the 3rd pipeline.
19. fluid mixing system as claimed in claim 18 is characterized in that, said the 3rd pipeline has distortion.
20. fluid mixing system as claimed in claim 18 is characterized in that, said first pipeline, said second pipeline and the 3rd pipeline are communicated with identical fluid.
21. fluid mixing system as claimed in claim 1 is characterized in that, said first fluid conduit is an air inlet duct, and said second fluid conduit systems is the EGR gas conduit.
22. a gas recirculation system comprises:
Air inlet duct; And
The exhaust gas recirculation conduit;
Wherein, said exhaust gas recirculation conduit is communicated with said air inlet duct fluid, and
Said exhaust gas recirculation conduit produces fluid stream that swirl or that roll.
23. gas recirculation system as claimed in claim 22 is characterized in that, said exhaust gas recirculation conduit comprises a plurality of parallelpipeds, the fluid stream that swirl or that roll of at least one generation in the wherein said parallelpiped.
24. gas recirculation system as claimed in claim 22 is characterized in that, said exhaust gas recirculation conduit has distortion, and said distortion is in the scope of spending about per inch 45 degree from about per inch 30.
25. gas recirculation system as claimed in claim 22 is characterized in that, said exhaust gas recirculation conduit has entering angle with respect to the center line of said air inlet duct, and said entering angle is being spent in the scope of about 90 degree from about 45.
26. gas recirculation system as claimed in claim 23; It is characterized in that; Said exhaust gas recirculation conduit comprises first pipeline and second pipeline; Said first pipeline has first entering angle with respect to the center line of said air inlet duct, and said second pipeline has second entering angle with respect to the center line of said air inlet duct.
27. gas recirculation system as claimed in claim 26 is characterized in that, said first entering angle is different with said second entering angle.
28. gas recirculation system as claimed in claim 26 is characterized in that, said first entering angle is identical with said second entering angle basically.
29. gas recirculation system as claimed in claim 26 is characterized in that, said first entering angle or said second entering angle are being spent in the scope of about 90 degree from about 45.
30. gas recirculation system as claimed in claim 22 is characterized in that, said exhaust gas recirculation conduit is communicated with a plurality of fluids.
31. gas recirculation system as claimed in claim 22 is characterized in that, said exhaust gas recirculation conduit produces fluid stream that swirl and that roll.
32. the method for a plurality of fluids of guiding comprises:
First fluid stream is provided in conduit;
Second fluid stream is provided in first pipeline;
Three-fluid stream is provided in second pipeline;
With first entering angle said second fluid stream is caused said first fluid stream with respect to said conduit; And
With second entering angle said three-fluid stream is caused said first fluid stream with respect to said conduit;
Wherein, said first pipeline or said second ducted at least one corresponding second fluid stream or three-fluid stream swirled or roll.
33. method as claimed in claim 32 is characterized in that, said first fluid stream comprises air.
34. method as claimed in claim 32 is characterized in that, at least one in said second fluid stream and the three-fluid stream comprises EGR gas.
35. method as claimed in claim 34 is characterized in that, all comprises EGR gas in said second fluid stream and the three-fluid stream.
36. method as claimed in claim 34 is characterized in that, one in said second fluid stream and the three-fluid stream comprises the fluid that is different from EGR gas.
37. method as claimed in claim 34 is characterized in that, a mixture that comprises EGR gas and other fluid in said second fluid stream and the three-fluid stream.
38. method as claimed in claim 32 is characterized in that, said method also comprises the 4th fluid stream is caused in the 3rd pipeline.
39. method as claimed in claim 32; It is characterized in that; Said method also comprises: before said second fluid stream and said three-fluid stream are caused said first fluid stream, said second fluid stream and said three-fluid are flowed the fluid that is merged into merging flow.
40. method as claimed in claim 32 is characterized in that, is spending in the scope of about 90 degree from about 45 for one in said first entering angle and said second entering angle.
41. method as claimed in claim 32 is characterized in that, said first entering angle is different with said second entering angle.
42. method as claimed in claim 32 is characterized in that, said first pipeline or said second ducted at least one cause corresponding second fluid stream or three-fluid stream to swirl or roll.
CN2010800232155A 2009-04-20 2010-04-20 Fluid mixing system Pending CN102439271A (en)

Applications Claiming Priority (5)

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US17091409P 2009-04-20 2009-04-20
US61/170,914 2009-04-20
US31734710P 2010-03-25 2010-03-25
US61/317,347 2010-03-25
PCT/US2010/031758 WO2010123905A1 (en) 2009-04-20 2010-04-20 Fluid mixing system

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WO2013055361A1 (en) * 2011-10-14 2013-04-18 International Engine Intellectual Property Company, Llc Egr air-exhaust mixer
KR101704239B1 (en) * 2015-07-27 2017-02-07 현대자동차주식회사 Device for mixing EGR gas and fresh air
JP2017180227A (en) * 2016-03-29 2017-10-05 ヤンマー株式会社 Engine device
JP7282683B2 (en) 2019-08-07 2023-05-29 株式会社小松製作所 mixing connector and engine

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EP2422061A4 (en) 2014-01-22
BRPI1016239A2 (en) 2016-04-26
EP2422061A1 (en) 2012-02-29
WO2010123905A1 (en) 2010-10-28

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