EP1251263A2 - Vorrichtung für Abgasrückführung - Google Patents

Vorrichtung für Abgasrückführung Download PDF

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Publication number
EP1251263A2
EP1251263A2 EP02006754A EP02006754A EP1251263A2 EP 1251263 A2 EP1251263 A2 EP 1251263A2 EP 02006754 A EP02006754 A EP 02006754A EP 02006754 A EP02006754 A EP 02006754A EP 1251263 A2 EP1251263 A2 EP 1251263A2
Authority
EP
European Patent Office
Prior art keywords
exhaust gas
gas recirculation
cooling circuit
cooler
valve
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
EP02006754A
Other languages
English (en)
French (fr)
Other versions
EP1251263A3 (de
EP1251263B1 (de
Inventor
Laurence A.D. Collins
Sylvie F. Fromentin
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.)
Delphi Technologies Inc
Original Assignee
Delphi Technologies Inc
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
Family has litigation
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Application filed by Delphi Technologies Inc filed Critical Delphi Technologies Inc
Publication of EP1251263A2 publication Critical patent/EP1251263A2/de
Publication of EP1251263A3 publication Critical patent/EP1251263A3/de
Application granted granted Critical
Publication of EP1251263B1 publication Critical patent/EP1251263B1/de
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
    • F02M26/65—Constructional details of EGR valves
    • F02M26/72—Housings
    • F02M26/73—Housings with means for heating or cooling the EGR valve
    • 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
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
    • F02M26/30—Connections of coolers to other devices, e.g. to valves, heaters, compressors or filters; Coolers characterised by their location on the engine
    • 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
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
    • F02M26/32—Liquid-cooled heat exchangers
    • 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
    • F02M26/65—Constructional details of EGR valves
    • F02M26/70—Flap valves; Rotary valves; Sliding valves; Resilient valves
    • 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
    • F02M26/65—Constructional details of EGR valves
    • F02M26/71—Multi-way valves

Definitions

  • the present invention relates to a device for exhaust gas recirculation for an internal combustion engine, especially to a cooler and a valve for exhaust gas recirculation.
  • Exhaust gas recirculation is a technique commonly used for controlling the generation of undesirable pollutant gases and particulate matter in the operation of internal combustion engines. This technique has proven particularly useful in diesel internal combustion engines used in motor vehicles such as passenger cars, trucks, and other on-road or off-road motor equipment.
  • the exhaust gas recirculation technique primarily involves the recirculation of exhaust gas by-products into the intake air supply of the internal combustion engine. This exhaust gas thus reintroduced to the engine cylinder reduces the concentration of oxygen therein, which in turn lowers the maximum combustion temperature within the cylinder and slows the chemical reaction of the combustion process, decreasing the formation of oxides of nitrogen NOx.
  • the exhaust gases typically contain a portion of unburned hydrocarbon which is burned on its reintroduction into the engine cylinder, which further reduces the emission of exhaust gas by-products which would be emitted as undesirable pollutants from the internal combustion engine.
  • a device for exhaust gas recirculation generally includes an intake air tube, an intake air control valve and an exhaust gas re-circulation valve.
  • the intake air control valve allows for the throttling the intake airflow in the intake air tube.
  • the exhaust gas re-circulation valve meters the flow of exhaust gases re-circulated into the intake air tube.
  • an exhaust gas cooler is moreover provided for cooling the exhaust gases to be fed into the engine air intake.
  • the exhaust gas recirculation device is often mounted upstream of the EGR cooler, i.e. on the hot gas side of the cooler.
  • the technical problem underlying the present invention is to provide an exhaust gas re-circulation device for an internal combustion engine, which is less expensive.
  • This problem is overcome by the exhaust gas recirculation device for an internal combustion engine according to the present invention.
  • This exhaust gas recirculation device comprises an exhaust gas recirculation conduit for feeding exhaust gases to an intake air channel of said engine, an exhaust gas recirculation valve arranged in said exhaust gas recirculation conduit for controlling the amount of exhaust gases fed into said intake air channel, and an exhaust gas cooler arranged in said exhaust gas re-circulation conduit for cooling the exhaust gas fed into said intake air channel, said exhaust gas cooler comprising a cooling circuit for a cooling fluid.
  • the exhaust gas recirculation valve comprises at least one cooling circuit for a cooling fluid, said cooling circuit of said exhaust gas recirculation valve being connected to said cooling circuit of said exhaust gas cooler.
  • a cooling fluid is flooded through the cooling circuit of the exhaust gas cooler.
  • the cooling circuit of the exhaust gas cooler being connected to the cooling circuit of the exhaust gas recirculation valve, this cooling fluid is also flooded through the cooling circuit of the exhaust gas recirculation valve. It follows that the components of the exhaust gas recirculation valve are cooled during the operation of the device, thus allowing the specification of cheaper materials. Furthermore, by using the cooling fluid directly from the exhaust gas cooler, the use of supplementary pipework is reduced to a minimum.
  • the direction of the flow of the cooling fluid may depend on the cooling requirements for the exhaust gas recirculation valve. If improved cooling of the exhaust gas recirculation valve is required, the cooling fluid can be fed into the cooling circuit of the exhaust gas recirculation valve before entering the cooling circuit of the exhaust gas cooler. Alternatively, the flow of cooling fluid can first enter the cooling circuit of the exhaust gas cooler before entering the exhaust gas recirculation valve.
  • the EGR cooler and the EGR valve are supplied as separate components, each being provided with two mounting flanges.
  • the EGR cooler and valve are then mounted together, either directly or by means of supplementary pipework.
  • said exhaust gas recirculation valve and said exhaust gas cooler are integrated into one single housing.
  • Such an integration of the valve and cooler provides for a very compact exhaust gas recirculation device.
  • this embodiment eliminates the need for later assembly of two separate parts and accordingly the risk of defects in assembling.
  • the number of parts like joints, bolts etc. is reduced. It follows that this embodiment reduces the costs of the exhaust gas recirculation device and at the same time improves the quality of the product.
  • the exhaust gas cooler usually comprises a housing defining a flow path for said exhaust gases, said flow path having an enlarged central portion and two tapered end portions.
  • the integration of the valve and the cooler is preferably achieved by integrating said exhaust gas recirculation valve into one of said end portions of said flow path of said exhaust gas cooler.
  • a further advantage of the integrated design of the valve and the cooler is that the interconnection of the respective cooling circuits of the exhaust gas recirculation valve and exhaust gas cooler is simplified.
  • the transfer of coolant between the two cooling circuits can be achieved by a simple duct.
  • this duct can comprise an external coolant duct which extends outside of said single housing.
  • the external duct can simply be connected to respective fittings on the exhaust gas recirculation valve cooling circuit and the exhaust gas cooler cooling circuit.
  • the duct may be an internal coolant duct, which is arranged inside said single housing.
  • the exhaust gas recirculation valve comprises an actuatable valve member, which is rotatably mounted into a flow path for said exhaust gas by means of bearings.
  • the cooling circuit of said exhaust gas recirculation valve preferably at least partially surrounds said flow path and/or said bearings of said actuatable valve member.
  • An embodiment of an exhaust gas recirculation device 10 according to the present invention is represented in fig. 1 and 2. These figures show an end portion of an integrated exhaust gas recirculation cooler and valve, i.e. an exhaust gas cooler 12 having an exhaust gas recirculation valve 14 integrated therein.
  • the exhaust gas cooler 12 typically comprises a housing 16 having a plurality of hollow tubes 18 arranged therein in a substantially parallel relationship. These hollow tubes 18 define a plurality of flow paths for the exhaust gas to be transferred through the exhaust gas cooler.
  • the areas surrounding the hollow tubes define a coolant circuit 20 for a cooling fluid supplied by a (non shown) coolant fluid source.
  • Fittings 21 are mounted in the housing 16 of the exhaust gas cooler 12 for connecting the coolant circuit 20 to a coolant feeding or discharge conduit.
  • the exhaust gas cooler further comprises an end portion 22 having a tapered inner form.
  • the taper of the end portions reduces the diameter of the flow path for the exhaust gases to the diameter of an exhaust gas recirculation conduit 24, and thus enables the exhaust gas cooler to be connected to said exhaust gas recirculation conduit 24.
  • the end portion 22 of the exhaust gas cooler is designed as a double walled housing having an outer wall 26 and a coaxial inner wall 28, the inner wall 28 being tapered towards the end of the cooler.
  • the two coaxial walls 26 and 28 confine an annular cooling channel 30, which at least partially surrounds the flow path defined by the inner wall 28.
  • the cooling channel 30 is closed by an end plate 32, which is sealingly mounted onto the front end of the end portion 22 of the exhaust gas cooler 12.
  • the end plate can be bolted onto the front end of cooler 12.
  • fittings 34 and 36 are mounted into the outer wall 26 of the end portion 22. These fittings are used to connect the cooling channel 30 to a coolant feeding or discharge conduit.
  • fitting 34 is connected to fitting 21 of the coolant circuit 20 by means of conduit. It follows that a coolant fluid, which is supplied to the exhaust gas recirculation device 10 subsequently flows through the two cooling circuits 20 and 30.
  • an exhaust gas recirculation valve 14 is integrated into the end portion 22 of the exhaust gas cooler 12.
  • the exhaust gas recirculation valve 22 e.g. a butterfly valve, comprises an acutatable member 40, which is arranged into the flow path defined by the inner wall 28 of end portion 22 of the exhaust gas cooler 12.
  • the valve member 40 is mounted on a shaft 42, which is rotatably mounted into the housing by means of bearings 44.
  • the bearings are preferably arranged in bushings 46, which radially extend through the cooling circuit 30. It follows that the cooling circuit 30 at least partially surrounds bushings 46. In operation, the bushings 46 are fully exposed to the flow of coolant fluid circulating in the cooling circuit 30. This results in an effective cooling of the bearings 44 located inside the bushings 46, since the different elements are preferably made of thermally conductive metal.
  • Shaft 42 comprises an actuating end 48, which extends outside wall 26. This actuating end 48 can be connected to an actuator 50 for actuating the valve member 40.
  • actuator 50 is mounted on the housing of exhaust gas cooler adjacent to actuating end 48.
  • the (non shown) connection between the actuator and the actuating end may be achieved by a cam means 52 mounted on the actuating end 48 of shaft 42, cam means mounted on a shaft of the actuator and a connecting rod for coupling the two cam means.

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)
EP02006754A 2001-04-20 2002-03-25 Vorrichtung für Abgasrückführung Expired - Lifetime EP1251263B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU90761A LU90761B1 (en) 2001-04-20 2001-04-20 Device for exhaust gas recirculation
LU90761 2001-04-20

Publications (3)

Publication Number Publication Date
EP1251263A2 true EP1251263A2 (de) 2002-10-23
EP1251263A3 EP1251263A3 (de) 2003-11-05
EP1251263B1 EP1251263B1 (de) 2006-01-25

Family

ID=19731981

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02006754A Expired - Lifetime EP1251263B1 (de) 2001-04-20 2002-03-25 Vorrichtung für Abgasrückführung

Country Status (4)

Country Link
EP (1) EP1251263B1 (de)
AT (1) ATE316610T1 (de)
DE (1) DE60208832T2 (de)
LU (1) LU90761B1 (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1431527A1 (de) * 2002-12-20 2004-06-23 Siemens Aktiengesellschaft Kühlelement für Gase
FR2891589A1 (fr) * 2005-09-30 2007-04-06 Renault Sas Refroidisseur de gaz recircules
FR2891590A1 (fr) * 2005-09-30 2007-04-06 Renault Sas Dispositif de repartition des gaz recircules, refroidisseur de gaz recircules et procede de recirculation de gaz d'echappement.
EP1925899A2 (de) * 2006-11-17 2008-05-28 Valeo Termico S.A. Gaswärmetauscher, insbesondere für die Abgase eines Motors
FR2914701A1 (fr) * 2007-04-05 2008-10-10 Inst Francais Du Petrole Installation pour le refroidissement des gaz d'echappement recircules de moteur a combustion interne et de la vanne de controle de la circulation de ces gaz.
EP2025910A1 (de) 2007-07-30 2009-02-18 Cooper-Standard Automotive (Deutschland) GmbH Abgasrückführsystem
WO2011106216A1 (en) * 2010-02-24 2011-09-01 Cts Corporation Cooling system for actuator
JP2014126180A (ja) * 2012-12-27 2014-07-07 Minebea Co Ltd 流量制御バルブ用玉軸受及びこれを組込んだ排出ガス再循環制御バルブ装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006043559B4 (de) * 2006-09-16 2008-12-04 Pierburg Gmbh Drosselklappenvorrichtung für Hochtemperaturanwendungen in Verbrennungskraftmaschinen
DE102010014843B4 (de) 2010-04-13 2020-06-25 Pierburg Gmbh Abgaskühlmodul für eine Verbrennungskraftmaschine
DE102012103374B4 (de) 2012-04-18 2015-01-08 Pierburg Gmbh Abgasklappenvorrichtung für eine Verbrennungskraftmaschine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0916837A2 (de) * 1997-11-17 1999-05-19 Behr GmbH & Co. Vorrichtung zur Abgasrückführung für einen Verbrennungsmotor
DE19841927A1 (de) * 1998-09-14 2000-03-16 Wahler Gmbh & Co Gustav Einrichtung zur Rückführung eines Abgasstromes zum Saugrohr einer Brennkraftmaschine
WO2000068560A2 (de) * 1999-05-05 2000-11-16 Daimlerchrysler Ag Vorrichtung zur rückführung des abgases einer brennkraftmaschine
WO2001020156A1 (en) * 1999-09-16 2001-03-22 Transtec Plc Exhaust gas recirculation system
WO2001044651A1 (en) * 1999-12-14 2001-06-21 Cooperstandard Automotive Fluid Systems Integrated egr valve and cooler

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0916837A2 (de) * 1997-11-17 1999-05-19 Behr GmbH & Co. Vorrichtung zur Abgasrückführung für einen Verbrennungsmotor
DE19841927A1 (de) * 1998-09-14 2000-03-16 Wahler Gmbh & Co Gustav Einrichtung zur Rückführung eines Abgasstromes zum Saugrohr einer Brennkraftmaschine
WO2000068560A2 (de) * 1999-05-05 2000-11-16 Daimlerchrysler Ag Vorrichtung zur rückführung des abgases einer brennkraftmaschine
WO2001020156A1 (en) * 1999-09-16 2001-03-22 Transtec Plc Exhaust gas recirculation system
WO2001044651A1 (en) * 1999-12-14 2001-06-21 Cooperstandard Automotive Fluid Systems Integrated egr valve and cooler

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1431527A1 (de) * 2002-12-20 2004-06-23 Siemens Aktiengesellschaft Kühlelement für Gase
US7950376B2 (en) 2005-09-30 2011-05-31 Renault S.A.S. Device for distributing recirculated gases, device for cooling recirculated gases and method of recirculating exhaust gases
FR2891589A1 (fr) * 2005-09-30 2007-04-06 Renault Sas Refroidisseur de gaz recircules
FR2891590A1 (fr) * 2005-09-30 2007-04-06 Renault Sas Dispositif de repartition des gaz recircules, refroidisseur de gaz recircules et procede de recirculation de gaz d'echappement.
WO2007039700A1 (fr) * 2005-09-30 2007-04-12 Renault S.A.S Refroidisseur de gaz recircules
WO2007039702A1 (fr) * 2005-09-30 2007-04-12 Renault S.A.S Dispositif de repartition des gaz recircules, refroidisseur de gaz recircules et procede de recirculation de gaz d'echappement
EP1925899A2 (de) * 2006-11-17 2008-05-28 Valeo Termico S.A. Gaswärmetauscher, insbesondere für die Abgase eines Motors
EP1925899A3 (de) * 2006-11-17 2010-11-17 Valeo Termico S.A. Gaswärmetauscher, insbesondere für die Abgase eines Motors
FR2914701A1 (fr) * 2007-04-05 2008-10-10 Inst Francais Du Petrole Installation pour le refroidissement des gaz d'echappement recircules de moteur a combustion interne et de la vanne de controle de la circulation de ces gaz.
WO2008142263A2 (fr) * 2007-04-05 2008-11-27 Ifp Installation pour le refroidissement des gaz d'echappement recircules de moteur a combustion interne et de la vanne de controle de la circulation de ces gaz
WO2008142263A3 (fr) * 2007-04-05 2009-02-19 Inst Francais Du Petrole Installation pour le refroidissement des gaz d'echappement recircules de moteur a combustion interne et de la vanne de controle de la circulation de ces gaz
EP2025910A1 (de) 2007-07-30 2009-02-18 Cooper-Standard Automotive (Deutschland) GmbH Abgasrückführsystem
US8353274B2 (en) 2007-07-30 2013-01-15 Cooper-Standard Automotive (Deutschland) Gmbh Exhaust gas recirculation system
KR101501772B1 (ko) * 2007-07-30 2015-03-11 한라비스테온공조 주식회사 배기 가스 재순환 시스템
WO2011106216A1 (en) * 2010-02-24 2011-09-01 Cts Corporation Cooling system for actuator
JP2014126180A (ja) * 2012-12-27 2014-07-07 Minebea Co Ltd 流量制御バルブ用玉軸受及びこれを組込んだ排出ガス再循環制御バルブ装置

Also Published As

Publication number Publication date
DE60208832T2 (de) 2006-08-31
EP1251263A3 (de) 2003-11-05
ATE316610T1 (de) 2006-02-15
DE60208832D1 (de) 2006-04-13
EP1251263B1 (de) 2006-01-25
LU90761B1 (en) 2002-10-21

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