WO2001023738A1 - Fluideinleitung für ein heisses fluid in einer hohlraumstruktur - Google Patents
Fluideinleitung für ein heisses fluid in einer hohlraumstruktur Download PDFInfo
- Publication number
- WO2001023738A1 WO2001023738A1 PCT/EP2000/009141 EP0009141W WO0123738A1 WO 2001023738 A1 WO2001023738 A1 WO 2001023738A1 EP 0009141 W EP0009141 W EP 0009141W WO 0123738 A1 WO0123738 A1 WO 0123738A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fluid
- inlet
- insert
- cavity structure
- flow
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
- F28F9/027—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits in the form of distribution pipes
- F28F9/0273—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits in the form of distribution pipes with multiple holes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/17—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system
- F02M26/18—Thermal insulation or heat protection
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10091—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements
- F02M35/10118—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements with variable cross-sections of intake ducts along their length; Venturis; Diffusers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10209—Fluid connections to the air intake system; their arrangement of pipes, valves or the like
- F02M35/10222—Exhaust gas recirculation [EGR]; Positive crankcase ventilation [PCV]; Additional air admission, lubricant or fuel vapour admission
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
- F02M35/10262—Flow guides, obstructions, deflectors or the like
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
- F02M35/10268—Heating, cooling or thermal insulating means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/17—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system
- F02M26/19—Means for improving the mixing of air and recirculated exhaust gases, e.g. venturis or multiple openings to the intake system
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Definitions
- the invention relates to a fluid inlet, which can be used in particular as exhaust gas recirculation in the intake tract of an internal combustion engine, according to the preamble of claim 1.
- the recycling of exhaust gases into the intake tract of an internal combustion engine is known. This measure is taken to reduce the pollutant emissions of the internal combustion engine.
- the problem here is the high temperature of the exhaust gas.
- the intake tract is made of plastic, the introduction of the exhaust gas can lead to a melting of the intake tract in the area of the exhaust gas supply.
- EP 486 338 A1 proposes double-walled exhaust gas introduction.
- the exhaust gas is introduced into the intake tract through the inner tube, the cavity resulting between the double wall having an insulating effect with respect to the contact point of the exhaust gas inlet with the intake tube.
- part of the fresh air drawn in is passed through the intermediate space, which is removed in front of a throttle valve and reaches the intermediate space via a bypass line.
- the cooling air returns to the intake through parallel openings parallel to the exhaust gas flow.
- the proportion of recirculated exhaust gas in relation to the combustion air passed through cannot be arbitrary increase.
- the double-walled pipe is connected directly to the suction pipe, so that at higher recirculation rates there is still a risk of the wall of the intake tract melting.
- the hot exhaust gas flow hits the opposite wall of the intake tract unhindered, which also creates an area of high thermal stress here, which can lead to component failure.
- a thermally resilient gas guiding element 26 (compare FIG. 2) can be provided, which protects the wall of the intake tract from direct impact of the hot exhaust gas flow.
- the hot exhaust gas flow has sufficient time within this gas guide element to mix with the intake air.
- the gas guide element is made of heat-resistant material. This material has a high level of thermal stability and can therefore temporarily store or conduct heat peaks in the introduced exhaust gas and release it again in the event of operating conditions with less heat generation.
- this component means an increase in the weight of the assembly. This is especially in mobile use, such as. B. in motor vehicles, not desired.
- the gas guide element increases the material and manufacturing costs for the intake tract.
- the object of the invention is therefore to provide a fluid inlet for introducing a hot fluid into a cooler one, which is inexpensive to manufacture, has the lowest possible component weight, and effectively protects the assembly against thermal stress from the introduced fluid. This object is achieved by the features of claim 1.
- the fluid introduction according to the invention consists of three structural functional areas, the cavity structure, the inlet connector and an insert.
- the cavity structure is suitable for the passage of a fluid and can e.g. B. consist of an intake pipe for an internal combustion engine.
- the inlet connector is suitable for connection to a feed line, the hot fluid to be introduced being passed through the feed line. These components are interconnected.
- the fluid introduction described must be designed for the thermal loads occurring due to the introduction of the hot fluid. This means that the inlet connection must be temperature-resistant to the fluid to be introduced. However, lower melting materials, e.g. B. plastic used. This would melt if the fluid introduced was directly acted upon and lead to failure of the assembly.
- an insert is provided in the cavity structure according to the invention in the area in which the introduced fluid would hit the walls of the cavity structure. This insert is characterized in that it has walls, the inner sides of which are at least substantially aligned with the direction of flow of the introduced fluid. This prevents a direct impact of the fluid to be introduced onto the insert.
- the flow of the fluid to be introduced will therefore gradually nestle up against the insert, as a result of which much less heat can be transferred to the insert than if the flow directly hit it.
- This effect is further supported by the fact that the fluid introduced can mix with the fluid passed through before it hits the insert, as a result of which the mixing results in a cooling of the fluid mixture.
- This also relieves the thermal load on the insert.
- the advantage according to the invention can be used in various ways. The use requires a smaller wall thickness compared to the inserts used in the prior art, which can save weight.
- the lower thermal capacity of the insert is made up for by the lower thermal load.
- Another option is to choose a lower melting material for the application. High-melting plastics can even be considered here. This reduces the component weight and allows the insert to be manufactured more economically. A plastic part can also be used for. B. easier to dispose of by ashing.
- a third possibility of using the described advantage is to increase the temperature of the fluid to be introduced.
- this results in a suitable application if the fluid introduction for exhaust gas recirculation is used in the intake tract of an internal combustion engine.
- a high exhaust gas recirculation rate is required in certain operating states in order to be able to comply with the required exhaust gas values.
- a space is provided between the insert and the walls of the cavity structure.
- the cavity can be designed as a bypass line section for the fluid passed through. The flow passed through then does not mix with the introduced fluid, so that it has additional cooling properties compared to the warming insert. In this way, the thermal load on the insert can be further reduced.
- a further variant of the invention arises when the walls of the insert are provided with openings which connect the space described to the inside of the insert. The fluid flow along the inside of the insert causes a suction jet pump effect at the breakthroughs, which sucks the already mentioned cool fluid to be passed through from the intermediate space.
- the fluid to be passed through flows on the inside, which is just mixing with the introduced fluid and is thereby heated.
- the fluid sucked in through the openings first forms a film on the inside of the insert, which creates a cooling shield which displaces the warmer fluid flow attacking from the inside. In this way, the thermal load on the insert can be further reduced, as a result of which the described advantages of the invention can be used more efficiently.
- the flow effects described can be used particularly efficiently if the walls of the insert are closed in a ring in accordance with a special embodiment of the invention.
- the inlet connection is provided with a curve. This is selected so that the fluid to be introduced is diverted in the direction of the fluid passed through.
- the insert can be optimally aligned in the cavity structure, so that it presents neither a great flow resistance to the fluid to be passed through nor the fluid introduced.
- a further advantageous design of the means for reducing the introduction of heat consists in a double-walled construction principle of the inlet connection. This has an inner wall and an outer wall, the fluid located in the space between these walls acting as an insulator. The fluid to be introduced is passed through the cross section formed by the inner wall.
- An alternative solution for the introduction of fluid provides for the inlet connection in the end region, which extends into the interior of the cavity structure, to be provided with outlet openings which point in the direction of the flow direction of the fluid passed through.
- the flow of the fluid to be introduced is introduced in the direction of the flow in the cavity structure.
- the fluid to be introduced is seized by the flow of the passed fluid and carried away by utilizing the suction jet pump effect, whereby rapid mixing takes place.
- the mixing simultaneously causes the fluid to be introduced to cool and the fluid to be passed to heat up.
- the resulting temperature is in the range of the permissible thermal stress on the inside of the insert.
- the outlet openings are arranged along the flanks at the end region of the inlet connector.
- the large number of openings improves the mixing effect, since the fluid flow of the fluid to be introduced is broken up into many small partial flows.
- the outlet openings are provided with baffle plates.
- the inlet connector is made of sheet metal, these guide plates can be produced in a simple manner by stamping.
- the baffles are preferably bent into the interior of the inlet connector and thus bring about an optimal mixing of the fluid to be introduced with the fluid to be passed through.
- the baffles cause the fluid flow to be introduced to emerge at the end region of the inlet connection, as a result of which the fluid to be introduced comes into direct contact with the wall is avoided with the walls of the cavity structure. This takes place only after a sufficient mixing distance in the further course of the flow to be passed through in the cavity structure.
- the inlet connection In order to further promote the mixing of the two fluids, it is advantageous to provide the inlet connection with a flow-optimized outer contour in relation to the flow passed through in the cavity structure.
- connection structure is manufactured as a bayonet lock in accordance with an expedient embodiment of the inventive concept.
- This creates a module that can be easily integrated into cavity structures. Especially if these are made of plastic, the corresponding receptacle can be easily integrated into the wall structure as a counterpart of the bayonet catch.
- the inlet connector and connection structure can then be designed as a standard component, which means that large quantities can be achieved. This leads to an increased economy of the solution.
- the fluid inlet can be easily installed by means of the bayonet lock, the reduced assembly effort also contributing to a further increase in the economy of the fluid inlet.
- FIG. 2 shows the detail X according to Figure 1, different fluid flows are shown schematically by arrows.
- a fluid inlet 10 according to FIG. 1 represents a section of an otherwise not shown intake tract for an internal combustion engine.
- This consists of a cavity structure 13, which is provided with an inlet 11 and an outlet 12, to the air flow of the intake air, indicated by wide arrows, to be able to pass through.
- Inlet and outlet can be regarded as interfaces of the fluid introduction system under consideration.
- An inlet connector 15 is fastened into the cavity structure via a bayonet catch 14. This has a connection 16 which can be connected to an exhaust gas feed line, not shown. The flow of the exhaust gas is indicated by thin arrows.
- the inlet connector is double-walled, with the inner tube 17 serving as insulation, so that excessive heating of the cavity structure 13 via the bayonet fitting is avoided.
- the double-walled part of the inlet connection is followed by a bend 18 which redirects the exhaust gas in the direction of the intake air.
- outlet openings 19 are provided, which have baffles 20 and thus enable the exhaust gas to be directed into the cavity structure.
- the curved area of the inlet nozzle is flat, so that it can be easily flowed around by the intake air and thereby entrains the exhaust gas.
- the outlet openings 19 open into a mixing section 21 which is formed by the inside 22 of a tubular insert 23.
- the insert is held in the cavity structure 13 by mounting ribs 24. It has a smaller outside diameter than the inside diameter of the cavity structure. In this way, an intermediate space 25 is formed, through which the intake air can flow. This secondary air flow is indicated by dashed arrows.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Nozzles (AREA)
- Temperature-Responsive Valves (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE50010122T DE50010122D1 (de) | 1999-09-24 | 2000-09-19 | Fluideinleitung für ein heisses fluid in einer hohlraumstruktur |
AT00964199T ATE293750T1 (de) | 1999-09-24 | 2000-09-19 | Fluideinleitung für ein heisses fluid in einer hohlraumstruktur |
JP2001527096A JP4498653B2 (ja) | 1999-09-24 | 2000-09-19 | 中空構造体における高温流体の流体導管 |
EP00964199A EP1214514B1 (de) | 1999-09-24 | 2000-09-19 | Fluideinleitung für ein heisses fluid in einer hohlraumstruktur |
US10/104,066 US6672292B2 (en) | 1999-09-24 | 2002-03-25 | Fluid inlet for introducing a hot fluid into a hollow structure |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19945769A DE19945769A1 (de) | 1999-09-24 | 1999-09-24 | Fluideinleitung für ein heißes Fluid in einer Hohlraumstruktur |
DE19945769.7 | 1999-09-24 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/104,066 Continuation US6672292B2 (en) | 1999-09-24 | 2002-03-25 | Fluid inlet for introducing a hot fluid into a hollow structure |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001023738A1 true WO2001023738A1 (de) | 2001-04-05 |
Family
ID=7923142
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2000/009141 WO2001023738A1 (de) | 1999-09-24 | 2000-09-19 | Fluideinleitung für ein heisses fluid in einer hohlraumstruktur |
Country Status (6)
Country | Link |
---|---|
US (1) | US6672292B2 (de) |
EP (1) | EP1214514B1 (de) |
JP (1) | JP4498653B2 (de) |
AT (1) | ATE293750T1 (de) |
DE (2) | DE19945769A1 (de) |
WO (1) | WO2001023738A1 (de) |
Cited By (1)
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FR2895028A1 (fr) * | 2005-12-20 | 2007-06-22 | Renault Sas | Dispositif de melange de fluides pour groupe motopropulseur |
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US7213639B2 (en) * | 2005-03-16 | 2007-05-08 | Detroit Diesel Coporation | Heat exchanger exhaust gas recirculation cooler |
JP2009524774A (ja) * | 2006-01-27 | 2009-07-02 | ボーグワーナー・インコーポレーテッド | 低圧egr凝縮液をコンプレッサの中に混合するユニット |
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JP4657250B2 (ja) * | 2007-05-29 | 2011-03-23 | 株式会社デンソー | 吸気装置 |
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EP2608309A1 (de) | 2011-12-21 | 2013-06-26 | Fortu Intellectual Property AG | Batteriemodul mit Batteriemodulgehäuse und Batteriezellen |
US9938934B2 (en) * | 2012-06-26 | 2018-04-10 | International Engine Intellectual Property Company, Llc | Exhaust gas recirculation |
CN102748169B (zh) * | 2012-07-05 | 2014-06-25 | 东风汽车公司 | 一种用于车用发动机废气再循环(egr)的混合装置 |
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US10233809B2 (en) | 2014-09-16 | 2019-03-19 | Southwest Research Institute | Apparatus and methods for exhaust gas recirculation for an internal combustion engine powered by a hydrocarbon fuel |
US9644574B2 (en) * | 2014-12-01 | 2017-05-09 | Denso International America, Inc. | EGR device having baffle and EGR mixer for EGR device |
US10012184B2 (en) * | 2014-12-01 | 2018-07-03 | Denso International America, Inc. | EGR device having diffuser and EGR mixer for EGR device |
US10125726B2 (en) | 2015-02-25 | 2018-11-13 | Southwest Research Institute | Apparatus and methods for exhaust gas recirculation for an internal combustion engine utilizing at least two hydrocarbon fuels |
US9797349B2 (en) | 2015-05-21 | 2017-10-24 | Southwest Research Institute | Combined steam reformation reactions and water gas shift reactions for on-board hydrogen production in an internal combustion engine |
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DE19546545B4 (de) * | 1995-12-13 | 2006-01-12 | Mahle Filtersysteme Gmbh | Saugrohrmodul |
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1999
- 1999-09-24 DE DE19945769A patent/DE19945769A1/de not_active Withdrawn
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- 2000-09-19 EP EP00964199A patent/EP1214514B1/de not_active Expired - Lifetime
- 2000-09-19 JP JP2001527096A patent/JP4498653B2/ja not_active Expired - Fee Related
- 2000-09-19 DE DE50010122T patent/DE50010122D1/de not_active Expired - Lifetime
- 2000-09-19 WO PCT/EP2000/009141 patent/WO2001023738A1/de active IP Right Grant
- 2000-09-19 AT AT00964199T patent/ATE293750T1/de not_active IP Right Cessation
-
2002
- 2002-03-25 US US10/104,066 patent/US6672292B2/en not_active Expired - Lifetime
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JPS5828583A (ja) * | 1981-07-31 | 1983-02-19 | Toyota Motor Corp | 排気ガス還流装置 |
EP0486338A1 (de) | 1990-11-14 | 1992-05-20 | Automobiles Peugeot | Einlasskrümmer für Brennkraftmaschine mit Abgasrückführeinrichtung |
EP0736683A2 (de) * | 1995-04-06 | 1996-10-09 | Robert Bosch Gmbh | Vorrichtung zum Verbinden eines Abgasrückführsystems mit einer Sauganlage eines Verbrennungsmotors |
EP0753656A1 (de) * | 1995-07-13 | 1997-01-15 | Aisan Kogyo Kabushiki Kaisha | Abgasrückführung |
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EP0886063A2 (de) | 1997-06-20 | 1998-12-23 | Robert Bosch Gmbh | Ansaugluftverteiler |
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Cited By (1)
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---|---|---|---|---|
FR2895028A1 (fr) * | 2005-12-20 | 2007-06-22 | Renault Sas | Dispositif de melange de fluides pour groupe motopropulseur |
Also Published As
Publication number | Publication date |
---|---|
US6672292B2 (en) | 2004-01-06 |
EP1214514A1 (de) | 2002-06-19 |
JP2003510503A (ja) | 2003-03-18 |
DE50010122D1 (de) | 2005-05-25 |
ATE293750T1 (de) | 2005-05-15 |
DE19945769A1 (de) | 2001-03-29 |
EP1214514B1 (de) | 2005-04-20 |
JP4498653B2 (ja) | 2010-07-07 |
US20020158151A1 (en) | 2002-10-31 |
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