EP2218897A1 - Dispositif de recirculation de gaz d'échappement pour un moteur à combustion interne - Google Patents

Dispositif de recirculation de gaz d'échappement pour un moteur à combustion interne Download PDF

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Publication number
EP2218897A1
EP2218897A1 EP09290103A EP09290103A EP2218897A1 EP 2218897 A1 EP2218897 A1 EP 2218897A1 EP 09290103 A EP09290103 A EP 09290103A EP 09290103 A EP09290103 A EP 09290103A EP 2218897 A1 EP2218897 A1 EP 2218897A1
Authority
EP
European Patent Office
Prior art keywords
channel
exhaust gas
coolant
exhaust
pipe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP09290103A
Other languages
German (de)
English (en)
Other versions
EP2218897B1 (fr
Inventor
Klaus Dr. Hassdenteufel
Alexander Fabrizius
Georg Feldhaus
Michael Schmidt
Klaus Irmler
Hans-Ulrich Steurer
Thierry Dr. Marimbordes
Pascal Noiseau
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mann and Hummel GmbH
Mahle Behr GmbH and Co KG
Original Assignee
Behr GmbH and Co KG
Mann and Hummel GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Behr GmbH and Co KG, Mann and Hummel GmbH filed Critical Behr GmbH and Co KG
Priority to EP09290103.2A priority Critical patent/EP2218897B1/fr
Priority to EP11179888.0A priority patent/EP2402585B1/fr
Priority to US12/704,374 priority patent/US8534267B2/en
Publication of EP2218897A1 publication Critical patent/EP2218897A1/fr
Application granted granted Critical
Publication of EP2218897B1 publication Critical patent/EP2218897B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • 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

Definitions

  • the invention relates to a device for exhaust gas recirculation for an internal combustion engine according to the preamble of claim 1 and claim 12
  • the recirculation of exhaust gas of an internal combustion engine for example, to reduce pollutants is common in commercial vehicles and passenger cars.
  • increasing return rates are required, for example, to over 30%.
  • the recirculated exhaust gas can have very high temperatures, depending on the recirculation rate and the operating state. It is known and customary to provide the inflow of the recirculated exhaust gas into the combustion air in a metal plenum region (intake manifold).
  • a coolant means any suitable fluid circuit of the internal combustion engine or of a motor vehicle as a whole, such as the engine coolant circuit, a separate low-temperature cooling circuit or the refrigeration circuit of an air conditioning system.
  • the coolant is preferably liquid, but in individual cases may also be gaseous or present in several phases.
  • the exhaust pipe is connected to a mounting member, in particular made of metal, wherein the coolant flows through a coolant channel provided on the mounting member.
  • the mounting member can be cooled, so that it is possible to provide the mounting member on non-temperature-resistant structures.
  • Examples include an air-conducting duct made of plastic or an intercooler made of aluminum.
  • Examples of a mounting member according to the invention are a plate, a sheet metal part, milled part or other suitable component, preferably made of aluminum or steel, which is designed for receiving the exhaust pipe on the one hand and for fixing to the air duct on the other.
  • the particular type of determination is arbitrary depending on the requirements, so for example cohesively (soldered, welded, glued, etc.), with fasteners such as screws, rivets, clips, etc. or otherwise.
  • the exhaust pipe in a preferred detail design has a connectable to the mounting member flange.
  • a detachable fixing for example by screwing the flange, possible.
  • the coolant channel also flows around the screws or fixing means, since these represent thermal bridges.
  • Further preferred may be between the Flange and the mounting member to be arranged a seal.
  • the coolant channel is arranged on a side opposite the flange of the mounting member, but can also be provided depending on the requirements on the same page.
  • the coolant channel is designed as a pipe, in particular cohesively connected to the mounting member.
  • a pipeline may have a polygonal or round cross-section.
  • the connection of the coolant channel to a cooling circuit can then be done, for example, by simply attaching hoses on free ends of the pipeline.
  • the coolant channel can also be formed as a one-piece or multi-piece sheet-metal part, in particular materially connected to the mounting member.
  • the region of the mouth of the exhaust pipe is provided on a through-flow of the coolant charge air cooler.
  • the exhaust gas in the radiator area can flow into the charge air, so that a good turbulence and at the same time a further cooling of the exhaust gas or better use of the intercooler is given.
  • the area of the confluence can be arranged on a coolant-side collector member of the intercooler to simplify the construction. With a suitable design of the collector member so can already sufficient cooling of the area the confluence can be achieved by the coolant flows in the collector. Depending on the requirements but can also be provided an additional coolant line for cooling the exhaust pipe.
  • the exhaust pipe opens into the channel upstream of an intercooler.
  • conventional air ducts are often made of plastic to save costs and weight, which previously opposed inflow of hot exhaust gas.
  • the channel is formed at least in the region of the mouth of the exhaust pipe of a plastic.
  • the invention also includes the features of any one of claims 12 to 16, thereby further avoiding excessive local heating of components by the exhaust stream.
  • the object of the invention is also achieved by the characterizing features of claim 12 for an aforementioned device.
  • the exhaust pipe branches in the region of its confluence into a plurality of pipe sections, whereby a particularly uniform distribution of the exhaust gas is achieved.
  • a single pipe section can be provided for the inflow of the exhaust gas into the air.
  • the outflow openings are distributed according to number and / or size over a length of the pipe section, that a hydraulic Ausströmquerites per unit length of the pipe section increases in the flow direction of the exhaust gas.
  • flow obstacles are arranged on at least some of the outflow openings, whereby a swirling achieved and / or a preferred outflow direction can be specified. In this way, a harmful heat input, for example, in the walls of the channel can be additionally avoided.
  • the outflow openings at least predominantly in an outflow angle of between 45 ° and 135 °, in particular between 90 ° and 135 °, are aligned with a main flow direction of the air in the channel.
  • the exhaust gas recirculation apparatus according to the first embodiment of the invention ( Fig. 1 ) comprises a designed as a perforated aluminum plate mounting member 2, which is set over a side opening of a compressed combustion air leading channel 1.
  • the determination of the channel can be made arbitrarily, such as by gluing, positive recording or screwing.
  • the mounting member has a central opening 2a, in which an exhaust pipe 3 made of a temperature-resistant material, such as stainless steel, is introduced, so that the exhaust gas (dashed arrow) flows into the channel for mixing with the combustion air (solid arrows).
  • the position of the inflow into the channel 1 is upstream of a charge air cooler.
  • a flange 4 is provided, by means of which the mounting member 2 and the exhaust pipe 3 are sealingly connected together. For this purpose, there is a seal 5 between flange 4 and mounting member 2.
  • the flange 4 is by means of screws (not shown), the corresponding bolt holes 4a, 2b pass through the flange and mounting member, releasably secured.
  • a coolant channel 6 is provided on it, which rotates the opening 2a.
  • the coolant channel 6 is located on the opposite side of the flange 4 and is formed as a round pipe.
  • the coolant channel 6 consists in the present case of aluminum and is soldered flat on the plate 2. Its (not shown) connection to a coolant circuit can be done by simply attaching hoses on its ends 6a.
  • the coolant circuit may be, for example, the cooling circuit of the internal combustion engine or else a separate or connected low-temperature cooling circuit.
  • an adjustable part of the exhaust gas flow is branched off and, if necessary, after cooling in an exhaust gas cooler (not shown), is supplied through the exhaust gas line 3 to the compressed combustion air in the channel 1.
  • the exhaust pipe can be heated to a high temperature of several hundred ° C. Damage to the material of the channel 1 is precluded by the fact that the exhaust pipe in the region of its junction dissipates heat to the coolant in the coolant channel 6, so that the mounting member 2 at any time at least in the region of its contact with the channel 1 has an uncritical temperature.
  • the seal 5 additional insulation between the mounting member 2 and exhaust pipe 3 is created.
  • the tube of the coolant channel 6 has a rectangular cross section, so that a particularly large contact area between the coolant channel 6 and mounting member 2 is available.
  • the coolant channel 6 is here formed by a patch on the mounting plate, the mounting member 2 through open sheet metal part 6b, so that the mounting member 2 forms a part of the wall of the coolant channel 6.
  • the molded part 6b is flat with the mounting member 2, wherein, for example, one of the parts may be formed from a solder-plated sheet metal.
  • Fig. 6 shows by way of example, which course the sheet metal part 6b can give the coolant channel 6.
  • terminals 6a are also provided for the coolant circuit.
  • coolant channel 6 and flange 4 are arranged on the same side of the mounting member 2.
  • the flange 4 sits with its seal 5 directly on the sheet metal part 6b, so that a particularly good and actively cooled insulation between flange 4 and 2 mounting member is given.
  • Fig. 7a is shown that the sheet metal part can also be composed of several sections 6b, 6c.
  • the coolant channel is shaped so that it includes the fastening screws 2b for the flange. As a result, these thermal bridges are actively cooled.
  • the device according to the invention is constructed in a unitary manner with an indirect or coolant-flow intercooler 7 with air-flowed and coolant-flow-through flat tubes 9, which are located in the immediate vicinity of the Exhaust pipe is located.
  • a bottom 8 of the intercooler 7 is enlarged or formed so that it comprises an opening 8a for the exhaust pipe 3.
  • a collector cover 10 is formed accordingly. It can be provided to combine the header cover 10 or water tank of the intercooler and a cooling channel 6 in a deep-drawn sheet metal part, for example.
  • a cooling duct 6 is not necessarily provided in this embodiment, since an active cooling of the exhaust pipe 3 is already given due to the punching through of the collector.
  • a coolant channel 6 is formed with a connection 6a, wherein the connection 6a is at the same time a connection of the intercooler to the coolant circuit.
  • Fig. 11 shows an example Fig. 9, Fig. 10 Similar embodiment of the invention, in which the exhaust pipe 3 opens directly into a charge air cooler 7.
  • a flange 4 of the exhaust pipe 3 is seated on a collector box 10 sealingly, wherein the collector box 10 rotates a swept by the exhaust pipe 3 and not flowed around by the coolant recess 11.
  • the header box 10 may be considered as a whole as a coolant passage for the exhaust pipe.
  • the protruding into the intercooler 7 exhaust pipe 3 is formed as a pipe section 12 having a plurality of radially directed exhaust ports 13 for the exhaust gas.
  • the exhaust gas is divided into a plurality of small partial flows, so that local overheating of components of the charge air cooler 7 is avoided.
  • such a pipe section 12 can also lead, while maintaining these advantages, into a simple channel 1, see, for example, the first exemplary embodiment.
  • the pipe section 12 is closed at the end, being received with its closed end in a seal 14 in an opening of the bottom 8 opposite the inlet side 8 '.
  • the pipe section can also protrude freely into the intercooler 7.
  • a branching of the exhaust gas line into a plurality of, in the present case three, tube sections 12 occurs, as a result of which an even more distributed outflow of the exhaust gas is achieved.
  • the branching takes place inside the charge air cooler behind the recess 11 or the inlet-side bottom 8.
  • This example relates to a further development of an exhaust pipe 3 with pipe section 12 as in the example Fig. 11 ,
  • the outflow openings 13 are formed over the course of the pipe section 12 with increasing spatial density (see upper cut edge of the pipe section 12) or with an increasing cross-sectional area at the same distance (see lower cut edge of the pipe section 12).
  • this achieves the result that a hydraulic outflow cross section per unit length of the pipe section 12 increases in the flow direction, so that the pressure drop of the exhaust gas associated with the outflow is compensated. Overall, this results in a more uniform mass flow of the outflowing exhaust gas over the length of the pipe section 12.
  • Flow obstacles 15 over at least some the discharge openings 13 are provided.
  • the flow obstacles 15 are designed as pushed-on sheet-metal rings which, at the points of overlap with the outflow openings 13, comprise dimensioned and erected tabs.
  • the tabs or flow obstacles 15 are shaped differently and / or placed.
  • Fig. 15 shows for clarity four sections through the four in Fig. 14 shown metal rings together with respective section of a plan view of the tabs.
  • Fig. 16 the flows of charge air (solid lines) and from a pipe section 12 inflowing exhaust gas (dashed lines) are shown, wherein the outflow openings are each arranged at different angles to the plane of symmetry or main flow direction of the charge air.
  • an angle to the geometric flow direction of the charge air is selected for the outflow 13, which is between 45 ° and 135 °, preferably between 90 ° and 135 °.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Exhaust Silencers (AREA)
  • Exhaust Gas After Treatment (AREA)
EP09290103.2A 2009-02-12 2009-02-12 Dispositif de recirculation de gaz d'échappement pour un moteur à combustion interne Not-in-force EP2218897B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP09290103.2A EP2218897B1 (fr) 2009-02-12 2009-02-12 Dispositif de recirculation de gaz d'échappement pour un moteur à combustion interne
EP11179888.0A EP2402585B1 (fr) 2009-02-12 2009-02-12 Dispositif de recirculation des gaz d'échappement pour un moteur à combustion interne
US12/704,374 US8534267B2 (en) 2009-02-12 2010-02-11 Device for exhaust gas recirculation for a combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09290103.2A EP2218897B1 (fr) 2009-02-12 2009-02-12 Dispositif de recirculation de gaz d'échappement pour un moteur à combustion interne

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP11179888.0A Division EP2402585B1 (fr) 2009-02-12 2009-02-12 Dispositif de recirculation des gaz d'échappement pour un moteur à combustion interne
EP11179888.0A Division-Into EP2402585B1 (fr) 2009-02-12 2009-02-12 Dispositif de recirculation des gaz d'échappement pour un moteur à combustion interne

Publications (2)

Publication Number Publication Date
EP2218897A1 true EP2218897A1 (fr) 2010-08-18
EP2218897B1 EP2218897B1 (fr) 2014-07-09

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EP09290103.2A Not-in-force EP2218897B1 (fr) 2009-02-12 2009-02-12 Dispositif de recirculation de gaz d'échappement pour un moteur à combustion interne
EP11179888.0A Not-in-force EP2402585B1 (fr) 2009-02-12 2009-02-12 Dispositif de recirculation des gaz d'échappement pour un moteur à combustion interne

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Application Number Title Priority Date Filing Date
EP11179888.0A Not-in-force EP2402585B1 (fr) 2009-02-12 2009-02-12 Dispositif de recirculation des gaz d'échappement pour un moteur à combustion interne

Country Status (2)

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US (1) US8534267B2 (fr)
EP (2) EP2218897B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015117835A1 (fr) 2014-02-04 2015-08-13 Mahle International Gmbh Dispositif pour la recirculation de gaz d'échappement

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* Cited by examiner, † Cited by third party
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US9080694B2 (en) 2011-06-22 2015-07-14 The Boeing Company Bulkhead fitting assembly
US9222447B2 (en) * 2012-07-26 2015-12-29 Ford Global Technologies, Llc Charge air cooler control system and method

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DE3916466A1 (de) * 1989-05-20 1990-11-22 Audi Ag Vorrichtung zur abgasrueckfuehrung
JPH1089160A (ja) * 1996-09-18 1998-04-07 Nissan Motor Co Ltd 内燃機関の排気還流装置
EP0881378A2 (fr) * 1997-05-30 1998-12-02 Nissan Motor Company, Limited Système de recirculation de gaz d'échappement pour moteur
WO2001006109A1 (fr) * 1999-07-15 2001-01-25 Filterwerk Mann+Hummel Gmbh Conduite fluidique destinee a un fluide a haute temperature dans une structure creuse
EP1152141A1 (fr) * 2000-05-05 2001-11-07 Siemens Aktiengesellschaft Procédé et dispositif de recirculation de gaz d'échappement dans le courant d'air d'admission
WO2003102396A1 (fr) * 2002-06-04 2003-12-11 Valeo Thermique Moteur Module d'echange de chaleur conforme pour envelopper un moteur de vehicule automobile
FR2856746A1 (fr) * 2003-06-25 2004-12-31 Valeo Thermique Moteur Sa Module de refroidissement de l'air de suralimentation et des gaz recircules d'un moteur a combustion interne de vehicule automobile
WO2005001272A1 (fr) * 2003-06-25 2005-01-06 Valeo Thermique Moteur Module de refroidissement de l’air de suralimentation et des gaz d’echappement recircules d’un moteur a combustion interne de vehicule automobile
WO2005071240A1 (fr) * 2003-12-24 2005-08-04 Valeo Thermique Moteur Module d’echange de chaleur pour la regulation de la temperature des gas admis dans un moteur thermique de vehicule automobile
FR2879262A1 (fr) * 2004-12-13 2006-06-16 Renault Sas Repartiteur d'air en matiere plastique pour moteur a combustion interne a recirculation de gaz d'echappement.
EP1882836A1 (fr) * 2006-07-27 2008-01-30 International Truck Intellectual Property Company, LLC. Refroidisseur d'air à charge intégrée et mélangeur de recirculation de gaz d'échappement
EP1911946A2 (fr) * 2006-10-11 2008-04-16 Behr GmbH & Co. KG Dispositif de refroidissement de l'air de suralimentation pour un moteur à combustion interne, système doté d'un dispositif de refroidissement de l'air de suralimentation

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DE3511094A1 (de) * 1985-03-27 1986-10-09 Doduco KG Dr. Eugen Dürrwächter, 7530 Pforzheim Vorrichtung zum zufuehren eines zusatzgasstroms in den ansaugkanal eines ottomotors
DE3916466A1 (de) * 1989-05-20 1990-11-22 Audi Ag Vorrichtung zur abgasrueckfuehrung
JPH1089160A (ja) * 1996-09-18 1998-04-07 Nissan Motor Co Ltd 内燃機関の排気還流装置
EP0881378A2 (fr) * 1997-05-30 1998-12-02 Nissan Motor Company, Limited Système de recirculation de gaz d'échappement pour moteur
WO2001006109A1 (fr) * 1999-07-15 2001-01-25 Filterwerk Mann+Hummel Gmbh Conduite fluidique destinee a un fluide a haute temperature dans une structure creuse
EP1152141A1 (fr) * 2000-05-05 2001-11-07 Siemens Aktiengesellschaft Procédé et dispositif de recirculation de gaz d'échappement dans le courant d'air d'admission
WO2003102396A1 (fr) * 2002-06-04 2003-12-11 Valeo Thermique Moteur Module d'echange de chaleur conforme pour envelopper un moteur de vehicule automobile
FR2856746A1 (fr) * 2003-06-25 2004-12-31 Valeo Thermique Moteur Sa Module de refroidissement de l'air de suralimentation et des gaz recircules d'un moteur a combustion interne de vehicule automobile
WO2005001272A1 (fr) * 2003-06-25 2005-01-06 Valeo Thermique Moteur Module de refroidissement de l’air de suralimentation et des gaz d’echappement recircules d’un moteur a combustion interne de vehicule automobile
WO2005071240A1 (fr) * 2003-12-24 2005-08-04 Valeo Thermique Moteur Module d’echange de chaleur pour la regulation de la temperature des gas admis dans un moteur thermique de vehicule automobile
FR2879262A1 (fr) * 2004-12-13 2006-06-16 Renault Sas Repartiteur d'air en matiere plastique pour moteur a combustion interne a recirculation de gaz d'echappement.
EP1882836A1 (fr) * 2006-07-27 2008-01-30 International Truck Intellectual Property Company, LLC. Refroidisseur d'air à charge intégrée et mélangeur de recirculation de gaz d'échappement
EP1911946A2 (fr) * 2006-10-11 2008-04-16 Behr GmbH & Co. KG Dispositif de refroidissement de l'air de suralimentation pour un moteur à combustion interne, système doté d'un dispositif de refroidissement de l'air de suralimentation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015117835A1 (fr) 2014-02-04 2015-08-13 Mahle International Gmbh Dispositif pour la recirculation de gaz d'échappement
DE102014201935A1 (de) 2014-02-04 2015-08-20 Mahle International Gmbh Anordnung zur Abgasrückführung

Also Published As

Publication number Publication date
US20100199650A1 (en) 2010-08-12
EP2402585A1 (fr) 2012-01-04
US8534267B2 (en) 2013-09-17
EP2402585B1 (fr) 2015-12-16
EP2218897B1 (fr) 2014-07-09

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