WO2010098321A1 - Ｅｇｒクーラ - Google Patents

Ｅｇｒクーラ Download PDF

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Publication number
WO2010098321A1
WO2010098321A1 PCT/JP2010/052766 JP2010052766W WO2010098321A1 WO 2010098321 A1 WO2010098321 A1 WO 2010098321A1 JP 2010052766 W JP2010052766 W JP 2010052766W WO 2010098321 A1 WO2010098321 A1 WO 2010098321A1
Authority
WO
WIPO (PCT)
Prior art keywords
exhaust gas
egr cooler
case
shielding member
inlet
Prior art date
Application number
PCT/JP2010/052766
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
津田　寛司
泰生 大久保
和夫 古橋
恵市 稲葉
Original Assignee
株式会社小松製作所
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 株式会社小松製作所 filed Critical 株式会社小松製作所
Priority to DE112010000919.8T priority Critical patent/DE112010000919B4/de
Priority to US13/203,532 priority patent/US20110308778A1/en
Priority to CN201080009328XA priority patent/CN102333949A/zh
Publication of WO2010098321A1 publication Critical patent/WO2010098321A1/ja

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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
    • F02M26/22—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

Definitions

  • the present invention relates to an EGR (Exhaust Gas Recirculation) cooler.
  • an EGR cooler may be provided to cool the exhaust gas returned to the air supply side.
  • the EGR cooler includes a plurality of tubes for circulating the exhaust gas, and a case (sometimes referred to as a shell) in which the tubes are accommodated, and one end side of the case is provided with an inlet for introducing the cooling water. At the other end side, an outlet for discharging the cooling water is provided.
  • the case is cylindrical, and an inlet side tank is provided at the opening on one end side of the case to allow the exhaust gas to flow into the tube, and the end on the other side of the case is the exhaust gas from the tube There is an outlet tank that lets out the water.
  • each end of the tube is fixed to the header plate by brazing or the like, and the header plate is fixed to the inner circumferential surface of the case by welding so as to close the opening of the case There is. That is, the cooling water flows in the outside of the plurality of tubes and the exhaust gas flows in the inside of the tubes in the case where both ends are closed by the header plate.
  • a shield plate having substantially the same shape as the header plate is provided on the upstream side of the header plate, and the tube end is extended to this shield plate.
  • An EGR cooler having a structure has been proposed (e.g., Patent Document 1).
  • Patent Document 1 Since the space between the inlet tank and the inside of the case is a double structure, the high temperature exhaust gas flowing into the inlet tank does not hit the header plate, and the temperature of the brazed portion with the tube is increased You can suppress it. Therefore, there is no fear that such a brazed portion will be cracked, and it is possible to prevent the cooling water in the case from leaking out.
  • the EGR cooler described in the above publication can prevent the exhaust gas from directly hitting the brazing part, the exhaust gas still directly contacts the peripheral wall portion (bonnet) of the inlet side tank.
  • the peripheral wall thermally expands to a large extent outward, and a thermal expansion difference occurs between the inlet side tank and the case or header plate to which it is fixed. That is, the casing and the header plate do not become very hot because most of them are always in contact with the cooling water, and the degree of thermal expansion is small, but the peripheral wall of the inlet side tank may be in contact with the cooling water Also, the thermal expansion is significant because only the exhaust gas contacts.
  • the case or header plate is deformed outward due to the significant thermal expansion of the inlet side tank, and as a result, the header plate and tube are jointed. High stress occurs in the part and cracks occur.
  • An object of the present invention is to provide an EGR cooler which can suppress thermal deformation due to a large thermal expansion difference from the inlet side tank and can prevent the occurrence of cracks.
  • a case in which the cooling water flows inside, an exhaust gas flowing inside, a plurality of tubes accommodated in the case, and an end of the plurality of tubes are joined to end the case
  • a shielding member for shielding the peripheral wall portion of the tank is provided.
  • the shielding member is preferably provided at the inlet side tank.
  • a gap be formed between the shielding member and the header plate.
  • the opening on the outlet side of the exhaust gas of the shielding member preferably covers the inlet side of all the tubes.
  • the shielding member is expanded toward the outlet side of the exhaust gas.
  • the opening portion on the outlet side be provided with a cylindrical outlet end portion having substantially the same diameter in the flow direction of the exhaust gas.
  • the shielding member is provided in the inlet side tank, the high temperature exhaust gas flowing into the inlet side tank is less likely to contact the peripheral wall portion of the inlet side tank, and to the outer side of the peripheral wall portion. Suppress thermal expansion. Therefore, the case and header plate joined to the inlet side tank are not affected by the thermal expansion of the inlet side tank, so there is no concern that they will be greatly deformed, preventing the generation of large stress at the joint portion between the header plate and the tube. Can prevent the occurrence of cracks.
  • the front and back direction is determined because the shielding member is not provided as the core formed of the header plate and the tube, so that the handedness of the front and back is the same.
  • Such a case can be easily assembled without the risk of erroneously assembling the front and rear.
  • the opening on the outlet side of the shielding member is sized to cover the ends of all the tubes, exhaust gas emitted from the shielding member can uniformly flow into each tube, and the cooling efficiency of the exhaust gas can be improved.
  • FIG. 2 is a cross-sectional view of the EGR cooler according to the present embodiment taken along the flow direction of the exhaust gas. Sectional drawing along the II-II line of FIG. The enlarged view which shows the principal part of an EGR cooler. The figure which shows the component used for an EGR cooler. The cross-sectional perspective view which shows the said component. Sectional drawing which shows the modification of this invention.
  • FIG. 1 is a cross-sectional view of the EGR cooler 10 according to the present embodiment taken along the flow direction of the exhaust gas (see hatching arrows).
  • 2 is a cross-sectional view taken along the line II-II in FIG.
  • FIG. 3 is an enlarged view showing the main part of the EGR cooler 10.
  • FIG. 4 is a view showing components used for the EGR cooler 10, and
  • FIG. 5 is a cross-sectional perspective view thereof.
  • the front side means the upstream side of the flow of exhaust gas
  • the rear side means the downstream side.
  • right and left mean right and left when viewed from the front side.
  • the EGR cooler 10 includes a cylindrical case 11, a plurality of flat tubes 12 for circulating exhaust gas housed inside the case 11, and header plates on both sides to which the ends of the tubes 12 are joined. 13 and an inlet-side tank 14 and an outlet-side tank 15 joined to the case 11 via the respective header plates 13, and the inlet-side tank 14 has a mounting flange 16 having an inlet 16A.
  • a mounting flange 17 having an outlet 17A is provided on each of the housings.
  • cylindrical projections 18 larger in diameter than the central body portion are formed.
  • an inlet 21 for allowing cooling water (see white arrow) to flow into the inside of the case 11.
  • An outlet 22 is provided for outflow.
  • a pair of gas venting holes 23 are provided at the upper part of the projection 18 on the cooling water inlet 21 side at a predetermined angle apart in the circumferential direction (only one is shown in FIG. 1).
  • a gap between mutually facing surfaces of the tubes 12 juxtaposed is a cooling water flow path 24 through which the cooling water passes.
  • the cooling water channels 24 are preferably all set to the same width dimension.
  • the cooling water inlet 21 (FIG. 1) is located below the projection 18 because the cooling water from the inlet 21 is the cooling water flow path In order to get into 24 immediately. Therefore, such an inlet 21 is preferably located at the lower central portion of the projection 18 as in the present embodiment. That is, in the present embodiment, the flow direction of the cooling water immediately after flowing in from the inflow port 21 and the vertical direction of each tube 12 are the same direction, and the flow of the cooling water is not hindered.
  • the tubes 12 are not illustrated in detail, part of the surface is brazed to each other with point-like protruding portions, and the header plate 13 is attached to the end of these tubes 12. Is brazed.
  • the core 25 is configured to include the tube 12 and the header plate 13.
  • the core 25 is manufactured in advance by brazing the tubes 12 to each other or by brazing the header plate 13 thereto, and the core 25 is vertically or horizontally divided into a case body 11A. , 11B, and the case bodies 11A and 11B are joined together by welding or the like. And each tank 14 and 15 is attached to the edge part of case 11 (header plate 13) by welding etc.
  • a cylindrical portion 131 formed on the outer periphery of the header plate 13 is fitted inside the opening end portion 111 of the case 11.
  • the open ends 141 and 151 of the tanks 14 and 15 are fitted, and they are integrally joined by welding.
  • the outer shapes of the open end portions 111, 141, 151 and the cylindrical portion 131 are not circular, and slightly shown as being representative of the open end portion 141 of the inlet side tank 14 in FIG. It has an odd shape with a square shape.
  • the inlet side tank 14 used in the present embodiment will be described in detail below based on FIGS.
  • the inlet side tank 14 has a cylindrical inlet end 142 fitted to the inlet 16A of the mounting flange 16, the above-mentioned open end 141 forming the outlet side, and a peripheral wall connecting these ends 141 and 142. And the peripheral wall portion 143 is expanded from the inlet end portion 142 toward the opening end portion 141 side.
  • the shielding member 19 has a cylindrical inlet end 192 which is fitted and welded into the inlet end 142 of the inlet tank 14, an outer rectangular outlet end 191 opened rearward, and the like. It is formed of a peripheral wall portion 193 connecting the end portions 191 and 192 with each other.
  • the external shape of the outlet end 191 is not limited to a square, and may be circular or the like, and the cross-sectional shape of the tube 12, the end of the core 25, or the open end 141 of the inlet side tank 14 It may be determined arbitrarily in consideration of the shape of the
  • the opening area of the outlet end 191 is sized to cover the entire area on the inlet side of all the juxtaposed tubes 12 so that the inflowing exhaust gas flows into the respective tubes 12 evenly.
  • the outlet end 191 is also formed in a straight cylindrical shape having an equal diameter along the flow direction of the exhaust gas (over the back and forth), and flows smoothly into each tube 12 without diffusing the exhaust gas from the shielding member 19. It is possible to
  • a minute gap S is formed between the outlet end 191 and the header plate 13 (in FIG. 1, it is exaggerated and drawn large for the sake of easy viewing).
  • the gap S should be small so that the exhaust gas does not get around to the peripheral wall portion 143 side of the inlet side tank 14, and it is also preferable to be small in order to smoothly flow the exhaust gas to each tube 12. Therefore, the gap S in the present embodiment is set smaller within a range in which the shielding member 19 does not contact the header plate 13 even when the shielding member 19 contacts the high temperature exhaust gas and thermally expands. .
  • the peripheral wall 193 extends from the inlet end 192 toward the outlet end 191. That is, the opening area of the outlet end 191 is larger than the opening area of the inlet end 192.
  • the peripheral wall portion 193 may have a shape corresponding to the size of the inflow port 16A.
  • the opening area of the inflow port 16A is larger and the diameter is substantially the same as the upper and lower dimensions in the drawing of the tube 12 In this case, it is formed in a straight cylindrical shape having the same shape as the inlet end 192 and the outlet end 191.
  • the high temperature exhaust gas flowing into the inlet tank 14 from the inlet 16A is almost in contact with the peripheral wall portion 143 by being guided by the shielding member 19. Instead, it flows into each tube 12.
  • the exhaust gas flowing through each tube 12 is cooled by the cooling water flowing outside the tube 12 in the case 11, flows out to the outlet side tank 15, and returns from the outlet side tank 15 to the air supply side of the engine.
  • the exhaust gas is less likely to contact the peripheral wall portion 143, so the thermal expansion of the peripheral wall portion 143 as shown by the two-dot chain line in FIG. 13 deformation can be prevented.
  • the header plate 13 by preventing the deformation of the header plate 13 in particular, it is possible to suppress the stress generation at the joint portion with the tube 12 and to prevent the occurrence of a crack at the outer joint portion.
  • the present invention is not limited to the above-described embodiment, and modifications, improvements, and the like as long as the object of the present invention can be achieved are included in the present invention.
  • the inlet tank 14, the mounting flange 16, and the shielding member 19 are separated from each other and joined by welding, but as shown in FIG. It may be manufactured as one piece.
  • the shielding member 19 is provided in the inlet side tank 14, but may be provided in the header plate 13. Moreover, as a shape of the shielding member 19, the case where there is no straight cylindrical outlet end part 191 like the said embodiment and the rear side opens the peripheral wall part 143 as it is is also included in this invention. However, by providing the outlet end 191, the flow of exhaust gas can be efficiently flowed into the tubes 12 toward the tubes 12, so this is preferable.
  • the outlet end 191 has an opening area sized to cover the ends of the entire tube 12, but the invention is not limited to this. Even small cases are included in the present invention. However, since the exhaust gas can be uniformly flowed to all the tubes 12 by setting the size so as to cover the end portions of all the tubes 12, it is preferable to do so because the cooling efficiency can be improved.
  • the shape of the peripheral wall portion 193 is also arbitrary, and is not limited to the linearly expanded shape as in the above embodiment, and may be a round shape so that the entire peripheral wall portion 193 is formed by a curved surface. An appropriate shape can be applied in the implementation.
  • the flat tube 12 was used as a tube which concerns on this invention, a tube of circular cross-section may be sufficient as a tube, and the tube of arbitrary shapes can be applied.
  • the shape of the outlet end 191 of the shielding member 19 is also preferably circular.
  • the shape of the header plate 13 is also arbitrary, and is not limited to the one having the cylindrical portion 131 as in the embodiment. That is, it may be flat and the outer periphery thereof may be joined to the inner peripheral surface of the case 11. Even in such a case, when the peripheral wall portion 143 of the inlet side tank 14 thermally expands, there is a possibility that the header plate 13 may be deformed along with the deformation of the case 11, and the joint portion between the header plate 13 and the tube 12 Because large stresses may occur, it is effective to apply the present invention to prevent stress generation.
  • the present invention can be suitably applied to construction machines, transport vehicles, and various industrial machines on which an engine equipped with an EGR system is mounted.
  • EGR cooler EGR cooler
  • 11 case
  • 12 tube
  • 13 header plate
  • 14 inlet side tank
  • 19 shielding member
  • 191 outlet end
  • S clearance

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
PCT/JP2010/052766 2009-02-27 2010-02-23 Ｅｇｒクーラ WO2010098321A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE112010000919.8T DE112010000919B4 (de) 2009-02-27 2010-02-23 Abgaskühler
US13/203,532 US20110308778A1 (en) 2009-02-27 2010-02-23 Egr cooler
CN201080009328XA CN102333949A (zh) 2009-02-27 2010-02-23 排气再循环冷却器

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009045584A JP5048695B2 (ja) 2009-02-27 2009-02-27 Ｅｇｒクーラ
JP2009-045584 2009-02-27

Publications (1)

Publication Number Publication Date
WO2010098321A1 true WO2010098321A1 (ja) 2010-09-02

Family

ID=42665528

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2010/052766 WO2010098321A1 (ja) 2009-02-27 2010-02-23 Ｅｇｒクーラ

Country Status (5)

Country Link
US (1) US20110308778A1 (zh)
JP (1) JP5048695B2 (zh)
CN (1) CN102333949A (zh)
DE (1) DE112010000919B4 (zh)
WO (1) WO2010098321A1 (zh)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2522845A1 (en) * 2011-05-11 2012-11-14 Borgwarner Emission Systems Spain, S.L. Heat exchanger for cooling a gas
CN102906412A (zh) * 2011-05-26 2013-01-30 丰田自动车株式会社 排气系统部件和egr冷却器以及排气系统部件的氮化处理方法
US11262143B2 (en) * 2017-09-06 2022-03-01 Borgwarner Emissions Systems Spain, S.L.U. Compact heat exchanger
WO2024053300A1 (ja) * 2022-09-05 2024-03-14 株式会社小松製作所 熱交換器

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DE102011007748A1 (de) * 2011-04-20 2012-10-25 Behr Gmbh & Co. Kg Abgaskühler zum Kühlen von Verbrennungsabgas einer Verbrennungskraftmaschine, Wassersammeladapter, Abgaskühlsystem und Verfahren zum Herstellen eines Abgaskühlsystems
DE102011076800A1 (de) * 2011-05-31 2012-12-06 Behr Gmbh & Co. Kg Wärmeübertrager
EP2724107B1 (en) * 2011-06-27 2017-09-27 Carrier Corporation Shell and tube heat exchanger with micro-channels
JP5923886B2 (ja) 2011-07-20 2016-05-25 株式会社デンソー 排気冷却装置
CN102619648B (zh) * 2012-03-21 2014-06-04 浙江银轮机械股份有限公司 一种具有隔热功能的板翅式egr冷却器
CN102734004A (zh) * 2012-05-15 2012-10-17 浙江银轮机械股份有限公司 一种egr冷却器的废气进气端结构
US9938935B2 (en) 2012-07-12 2018-04-10 General Electric Company Exhaust gas recirculation system and method
US10508621B2 (en) 2012-07-12 2019-12-17 Ge Global Sourcing Llc Exhaust gas recirculation system and method
US9140217B2 (en) * 2012-09-06 2015-09-22 Senior Ip Gmbh Exhaust gas recirculation apparatus and method for forming same
CN103104377A (zh) * 2012-11-12 2013-05-15 无锡双翼汽车环保科技有限公司 Egr冷却器
EP2741045A1 (en) * 2012-12-07 2014-06-11 BorgWarner Inc. Heat exchanger
US20140311466A1 (en) * 2013-04-17 2014-10-23 Caterpillar Inc. Coolant Inlet Structures for Heat Exchangers for Exhaust Gas Recirculation Systems
FR3006992B1 (fr) * 2013-06-18 2015-07-24 Eurocopter France Systeme de chauffage de l habitacle d un aeronef muni d un echangeur thermique annulaire autour de la tuyere d echappement
WO2015038111A1 (en) * 2013-09-11 2015-03-19 International Engine Intellectual Property Company, Llc Thermal screen for an egr cooler
US9470187B2 (en) * 2014-04-14 2016-10-18 Fca Us Llc EGR heat exchanger with continuous deaeration
EP2944913B1 (en) * 2014-05-16 2018-09-05 Borgwarner Emissions Systems Spain, S.L.U. Heat exchange device
US9551272B2 (en) * 2014-11-05 2017-01-24 Deere & Company Power system with heat transfer circuits
KR20160097613A (ko) * 2015-02-09 2016-08-18 현대자동차주식회사 통합 egr 쿨러
KR20180010364A (ko) * 2016-07-20 2018-01-31 현대자동차주식회사 Egr쿨러 결합구조
WO2020031786A1 (ja) * 2018-08-09 2020-02-13 愛三工業株式会社 Ｅｇｒ装置
KR20200124582A (ko) * 2019-04-24 2020-11-03 현대자동차주식회사 배기가스 재순환용 쿨러

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JP2006520883A (ja) * 2003-03-21 2006-09-14 ベール ゲーエムベーハー ウント コー カーゲー 排気熱交換器および排気熱交換器用密封機溝
JP2004346919A (ja) * 2003-05-26 2004-12-09 Nissan Diesel Motor Co Ltd Ｅｇｒクーラー
JP2008537044A (ja) * 2005-03-24 2008-09-11 ベア・ゲーエムベーハー・ウント・シーオー．カーゲー 排気ガス熱交換器、特に、自動車の排気ガス還流のための排気ガス冷却器
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2522845A1 (en) * 2011-05-11 2012-11-14 Borgwarner Emission Systems Spain, S.L. Heat exchanger for cooling a gas
WO2012152852A1 (en) * 2011-05-11 2012-11-15 Borgwarner Emissions Systems Spain, S.L. Heat exchanger for cooling exhaust gas
CN103703238A (zh) * 2011-05-11 2014-04-02 博格华纳发射系统西班牙有限公司 用于对废气进行冷却的热交换器
JP2014514532A (ja) * 2011-05-11 2014-06-19 ボルグワーナー エミッションズ システムス スペイン，エセ．エレ．ユー 排気ガスを冷却するための熱交換装置
US9512807B2 (en) 2011-05-11 2016-12-06 Borgwarner Emissions Systems Spain, S.L. Unipersonal Heat exchanger for cooling exhaust gas
CN102906412A (zh) * 2011-05-26 2013-01-30 丰田自动车株式会社 排气系统部件和egr冷却器以及排气系统部件的氮化处理方法
US11262143B2 (en) * 2017-09-06 2022-03-01 Borgwarner Emissions Systems Spain, S.L.U. Compact heat exchanger
WO2024053300A1 (ja) * 2022-09-05 2024-03-14 株式会社小松製作所 熱交換器

Also Published As

Publication number Publication date
JP2010196679A (ja) 2010-09-09
US20110308778A1 (en) 2011-12-22
DE112010000919T5 (de) 2012-05-31
CN102333949A (zh) 2012-01-25
JP5048695B2 (ja) 2012-10-17
DE112010000919B4 (de) 2014-07-03

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