EP1152141A1 - Procédé et dispositif de recirculation de gaz d'échappement dans le courant d'air d'admission - Google Patents

Procédé et dispositif de recirculation de gaz d'échappement dans le courant d'air d'admission Download PDF

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Publication number
EP1152141A1
EP1152141A1 EP00109646A EP00109646A EP1152141A1 EP 1152141 A1 EP1152141 A1 EP 1152141A1 EP 00109646 A EP00109646 A EP 00109646A EP 00109646 A EP00109646 A EP 00109646A EP 1152141 A1 EP1152141 A1 EP 1152141A1
Authority
EP
European Patent Office
Prior art keywords
intake passage
exhaust gas
throttle
blade
adjacent
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
EP00109646A
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German (de)
English (en)
Other versions
EP1152141B1 (fr
Inventor
Paul William Guthrie
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to EP00109646A priority Critical patent/EP1152141B1/fr
Priority to DE60018041T priority patent/DE60018041T2/de
Publication of EP1152141A1 publication Critical patent/EP1152141A1/fr
Application granted granted Critical
Publication of EP1152141B1 publication Critical patent/EP1152141B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F02M26/19—Means for improving the mixing of air and recirculated exhaust gases, e.g. venturis or multiple openings to the intake system
    • 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
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
    • F05C2225/08—Thermoplastics

Definitions

  • This invention relates to a method and an apparatus for recirculating exhaust gas into inlet air flowing through an intake passage of an internal combustion engine.
  • a conventional air intake and exhaust gas recirculation assembly comprises a housing including an intake passage for inlet air, a throttle valve including a throttle blade arranged in the intake passage so as to be rotatable about a pivot axis between opening and closing positions, and an exhaust gas recirculation conduit communicating with said intake passage downstream of the throttle valve so as to introduce exhaust gas into the inlet air flowing through the intake passage.
  • ice can form on the throttle body. Ice forms where there is sufficient moisture in the inlet air to condensate on cold surfaces and then to change to ice. Ice formation influences the airflow through the intake passage in a similar way to deposits and therefore affects the operation of the engine severely. Icing of the throttle body occurs when the throttle body surfaces are cold and sufficient moisture is present in the inlet air. Inside the inlet manifold moisture comes from both the exhaust gas and blow-by gas from the crank case.
  • EP 0 881 378 A3 describes a method of introducing exhaust gas in such a way that it is drawn into the inlet manifold downstream of the throttle body through tangential openings.
  • the tangential introduction results in a spiral motion of the entering gas which is said to facilitate good mixing with the inlet air.
  • US-A-4 697 569 describes a method of introducing exhaust gas at the throttle body through semi-circular annular openings to facilitate good mixing with the inlet air.
  • US-A-4 461 150 describes a method of introducing exhaust gas into the inlet manifold downstream of the throttle body through a number of symmetrically arranged angled inlets so as to produce a spiral gas flow into the inlet manifold. Similar as in the above mentioned EP 0 881 378 such spiral gas flow is said to provide for good mixing of the inlet air and the exhaust gas. Furthermore, such spiral gas flow is intended to prevent the exhaust gas from contacting the throttle body. To this end the exhaust gas is fed into a region downstream of the throttle blade so as not to get entrained into the backflow air region formed in the wake of the throttle blade.
  • DE 4 420 247 A1 describes a method of introducing exhaust gas into the inlet manifold downstream of the throttle body through a plurality of openings arranged in a circular symmetrical pattern about the axis of the intake passage.
  • This patent discloses also another embodiment wherein the plurality of openings is replaced by a single annular opening.
  • the intake passage includes a venturi section at the area into which the exhaust gas is introduced by the openings. Such a venturi section will create higher inlet air velocity which may improve the mixing of inlet air and recirculated exhaust gas.
  • this patent talks about a thermal insulation between the throttle body and the plastic inlet manifold to prevent damage to the plastic manifold.
  • the inventor has recognized that air recirculation zones resulting from air flow around the throttle blade are not symmetrical with respect to the axis of the intake passage due to the angular positions of the throttle blade. Actually, more of the air recirculation zone extends on the side adjacent the downstream opening blade section of the throttle blade than on the other side. Directing more exhaust gas towards the upstream opening blade section side rather than towards the other side allows to introduce the exhaust gas into the intake passage very close to the throttle blade without the exhaust gas being entrained into the air recirculation zone.
  • the exhaust gas is introduced into the intake passage close to the throttle blade at a location where the inlet air is free flowing and has been accelerated due to the cross-sectional area of the intake passage being restricted by the throttle blade. Furthermore, it is preferred that the exhaust gas is introduced into the intake passage so as to flow substantially only in radial and axial directions, i.e. not in a circumferential direction to avoid spiral flow thereof.
  • the present invention provides for good mixing of the inlet air and the recirculated exhaust gas because the entry point for the exhaust gas can be disposed very close to the throttle valve so that the gases have the longest possible time to mix.
  • a further benefit of the exhaust gas entry point being close to the throttle valve is the heating of the housing at an area close to the throttle valve. This should help to prevent ice formation on the surfaces of the intake passage and the throttle valve.
  • the mixing time being maximized, the heat of the exhaust gas is diluted well before it reaches the interior surfaces of an inlet manifold downstream of the throttle valve. So the manifold even if it is made of plastic material will not be damaged by the hot exhaust gas.
  • the exhaust gas Due to the asymmetrical distribution of the exhaust gas flow pattern in the intake passage the exhaust gas can be prevented from being entrained into the air recirculation zone even though the exhaust gas is introduced into the intake passage very close to the throttle blade. As a result thereof the exhaust gas is prevented from contacting the interior surfaces of the intake passage and the throttle blade so that deposit formation in these areas is minimized. Another advantage thereof is that no moisture contained in the exhaust gas is recirculated within the intake passage and to the throttle blade to prevent ice formation on the surfaces of the intake passage and the throttle blade.
  • the present invention allows to prevent deposit and ice formation and at the same time to provide for good mixing.
  • the air intake and exhaust gas recirculation assembly shown therein comprises a housing 2 including an intake passage 4 for feeding inlet air IA towards a plurality of cylinders of an internal combustion engine (not shown).
  • a throttle valve has a throttle blade 6 which is disposed within the intake passage 4 so as to be rotatable about a pivot axis 8 between opening and closing positions.
  • the throttle blade 6 has blade sections 6a and 6b on opposite sides of the pivot axis 8, with the blade section 6a moving in an upstream direction and the blade section 6b moving in a downstream direction when the blade 6 is moved towards an opening position.
  • the housing 2 comprises a throttle body 10, an annular member 12, and an inlet manifold 14, with the annular member 12 being positioned between the throttle body 10 and the inlet manifold 14.
  • the intake passage 4 extending through the throttle body 10, the annular member 12 and the inlet manifold 14 is of cylindrical shape, i.e. of uniform cross-section.
  • the annular member 12 includes an annular flow passage 16 extending about the intake passage 4.
  • the annular passage 16 communicates with an exhaust gas recirculation conduit 18 so as to receive exhaust gas from an exhaust gas system of the internal combustion engine.
  • the exhaust gas recirculation conduit 18 is connected to the annular flow passage 16 by a single port 20 of oblong cross-section, see Figs. 2 and 3.
  • the annular passage 16 is formed by a circumferential channel in the annular member 12, which channel is internally confined by a band-shaped annular ring 22.
  • the ring 22 is provided with an annular array of circumferentially spaced openings 24 in the shape of slots so as to enable the exhaust gas to flow from the annular passage into the intake passage 4 as will be explained in more detail below.
  • Fig. 4 shows by full lines an air recirculation zone AR1 during part or low load conditions and by dotted lines an air recirculation zone AR2 during full load conditions.
  • the air recirculation zones AR1 and AR2 are somewhat asymmetrical to the longitudinal axis of the intake passage 4, i.e. they are somewhat displaced towards the right side in Fig. 4 due to the angular positions of the throttle blade 6.
  • This asymmetrical flow pattern of the air recirculation zones allows to introduce the recirculated exhaust gas from the annular passage 16 into the intake passage 4 in a similar asymmetrical flow pattern very close to the throttle blade 6, while the exhaust gas is prevented from being entrained into the air recirculation zones under all operating conditions.
  • more exhaust gas is introduced into the intake passage 4 on its left side than on its right side in Fig. 4. More particularly and as schematically indicated in Fig. 5 a greater amount such as 70 to 80% of the exhaust gas received from the exhaust gas recirculation conduit 18 is introduced into the intake passage 4 over an arc C of about 160 to 180°.
  • the openings 24 are of cross-sectional areas which increase from one side to the other, as schematically indicated in Fig. 1.
  • the number of the openings 24 on one side may exceed the number of openings 24 on the other side.
  • the cross-sectional area of the annular flow passage 16 may be increased from one side to the other. Further additional or alternative measures to ensure the desired asymmetrical distribution of the recirculated exhaust gas introduced into the intake passage 4 are readily available to the skilled person.
  • the slot-shaped openings 24 are disposed in a common plane extending perpendicularly with respect to the longitudinal axis of the intake passage 4.
  • the distance D between such common plane and a radial plane extending through the pivot axis 8 is chosen such that the exhaust gas introduced into the intake passage 4 just avoids the air recirculation zone AR1, i.e. to introduce the exhaust gas as close as possible to the throttle blade 6 without being entrained into the air recirculation zone.
  • the exhaust gas is introduced at a location where the inlet air is free flowing past the throttle blade 6 around the air recirculation zone. At this location the inlet air flows at increased velocities due to the flow restriction which results from the throttle blade 6 being in an angular position.
  • the openings 24 are arranged such that the exhaust gas when being introduced into the intake passage 4 flows substantially only in radial and axial directions. This is in contrast to some prior art solutions where circumferential flow components provide for a spiral flow of the exhaust gas.
  • the throttle body 10 and the annular member 12 are made of a metal of low thermal inertia, preferably of die cast aluminium. While in the embodiment shown the throttle body 10 and the annular member 12 are separate structural parts, it is to be understood that they could be integrally formed as a single part.
  • the ring 22 is preferably made of stainless steel.
  • a thermally conductive sealing means 26 comprising a gasket is disposed between the annular member 12 and the throttle body 10.
  • the inlet manifold 14 is preferably, but not exclusively, made of plastic material. Introducing the exhaust gas into the intake passage 4 in the manner as described above allows to reduce the temperature of the exhaust gas sufficiently so that it cannot damage the plastic inlet manifold.
  • the exhaust gas recirculation conduit 18 is a single pipe feeding the recirculated exhaust gas into the annular passage 16.
  • a bore 30 of a hydraulic diamter equivalent to that of the exhaust gas recirculation conduit 18 is used to connect the conduit opening to the port 20 of the annular flow passage 16.
  • An exhaust gas recirculation valve 28 is disposed in the exhaust gas recirculation conduit 18 so as to be remote from the housing 2, even though it could also be integrated into the housing 2.
EP00109646A 2000-05-05 2000-05-05 Procédé et dispositif de recirculation de gaz d'échappement dans le courant d'air d'admission Expired - Lifetime EP1152141B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP00109646A EP1152141B1 (fr) 2000-05-05 2000-05-05 Procédé et dispositif de recirculation de gaz d'échappement dans le courant d'air d'admission
DE60018041T DE60018041T2 (de) 2000-05-05 2000-05-05 Verfahren und Vorrichtung zur Rückführung von Abgas in den Ansaugluftstrom

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP00109646A EP1152141B1 (fr) 2000-05-05 2000-05-05 Procédé et dispositif de recirculation de gaz d'échappement dans le courant d'air d'admission

Publications (2)

Publication Number Publication Date
EP1152141A1 true EP1152141A1 (fr) 2001-11-07
EP1152141B1 EP1152141B1 (fr) 2005-02-09

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DE (1) DE60018041T2 (fr)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1508684A1 (fr) * 2003-08-16 2005-02-23 Pierburg GmbH Système d'admission de gaz d'échappement pour un moteur à combustion interne
FR2871530A1 (fr) * 2004-06-11 2005-12-16 Renault Sas Dispositif et procede perfectionnes de recyclage de gaz brules
WO2007140148A2 (fr) * 2006-05-24 2007-12-06 Honeywell International Inc. Mélangeur à recyclage de gaz d'échappement
EP2218897A1 (fr) * 2009-02-12 2010-08-18 Behr GmbH & Co. KG Dispositif de recirculation de gaz d'échappement pour un moteur à combustion interne
FR2954412A1 (fr) * 2009-12-22 2011-06-24 Valeo Sys Controle Moteur Sas Moteur a combustion interne integrant un dispositif de recirculation des gaz d'echappement
US8056340B2 (en) * 2010-08-17 2011-11-15 Ford Global Technologies, Llc EGR mixer for high-boost engine systems
US20120227399A1 (en) * 2011-03-11 2012-09-13 International Engine Intellectual Property Company, Llc In-flow air injection housing
US20120260895A1 (en) * 2011-04-13 2012-10-18 GM Global Technology Operations LLC Internal combustion engine
CN103038477A (zh) * 2011-01-19 2013-04-10 三菱重工业株式会社 增压器及具备该增压器的柴油机
CN103256149A (zh) * 2013-05-27 2013-08-21 奇瑞汽车股份有限公司 一种提高汽油机废气再循环各缸均匀性的装置及方法
CN108104986A (zh) * 2017-12-27 2018-06-01 潍柴动力股份有限公司 发动机及其混合进气装置
EP3009652B1 (fr) * 2014-09-30 2018-06-06 Kubota Corporation Collecteur d'admission d'un moteur à plusieurs cylindres
CN108150316A (zh) * 2017-12-25 2018-06-12 潍柴动力股份有限公司 Egr混合装置及内燃机
WO2019127098A1 (fr) * 2017-12-27 2019-07-04 潍柴动力股份有限公司 Moteur et son dispositif d'admission de gaz mixte
CN114673611A (zh) * 2022-04-14 2022-06-28 中国第一汽车股份有限公司 废气再循环混合装置、废气再循环系统及车辆

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2114548A (en) * 1935-02-25 1938-04-19 Roger W Stadlman Carburetor attachment
DE2128646A1 (de) * 1970-06-04 1971-12-09 General Motors Corp., Detroit, Mich. (V.StA.) Brennkraftmaschine mit Abgasrückführung zum Ansaugkanal
US4461150A (en) 1981-02-21 1984-07-24 Daimler-Benz Aktiengesellschaft Exhaust gas return pipe connection for an internal combustion engine
US4697569A (en) 1985-05-23 1987-10-06 Daimler-Benz Aktiengesellschaft Intake system for a multi-cylinder internal combustion engine
DE4420247A1 (de) 1994-06-10 1995-12-14 Iav Motor Gmbh Abgasrückführungseinrichtung für Verbrennungsmotoren, insbesondere mit Plastesaugrohren
EP0809012A2 (fr) * 1996-05-14 1997-11-26 Nippon Soken, Inc. Dispositif de recirculation de gaz d'échappement
EP0881378A2 (fr) 1997-05-30 1998-12-02 Nissan Motor Company, Limited Système de recirculation de gaz d'échappement pour moteur
DE19809862A1 (de) * 1998-03-07 1999-09-09 Mann & Hummel Filter Vorrichtung zur Rückführung von Abgasen bei einem Verbrennungsmotor

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2114548A (en) * 1935-02-25 1938-04-19 Roger W Stadlman Carburetor attachment
DE2128646A1 (de) * 1970-06-04 1971-12-09 General Motors Corp., Detroit, Mich. (V.StA.) Brennkraftmaschine mit Abgasrückführung zum Ansaugkanal
US4461150A (en) 1981-02-21 1984-07-24 Daimler-Benz Aktiengesellschaft Exhaust gas return pipe connection for an internal combustion engine
US4697569A (en) 1985-05-23 1987-10-06 Daimler-Benz Aktiengesellschaft Intake system for a multi-cylinder internal combustion engine
DE4420247A1 (de) 1994-06-10 1995-12-14 Iav Motor Gmbh Abgasrückführungseinrichtung für Verbrennungsmotoren, insbesondere mit Plastesaugrohren
EP0809012A2 (fr) * 1996-05-14 1997-11-26 Nippon Soken, Inc. Dispositif de recirculation de gaz d'échappement
EP0881378A2 (fr) 1997-05-30 1998-12-02 Nissan Motor Company, Limited Système de recirculation de gaz d'échappement pour moteur
DE19809862A1 (de) * 1998-03-07 1999-09-09 Mann & Hummel Filter Vorrichtung zur Rückführung von Abgasen bei einem Verbrennungsmotor

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1508684A1 (fr) * 2003-08-16 2005-02-23 Pierburg GmbH Système d'admission de gaz d'échappement pour un moteur à combustion interne
US7011082B2 (en) 2003-08-16 2006-03-14 Pierburg Gmbh Exhaust gas feeding device for an internal combustion machine
FR2871530A1 (fr) * 2004-06-11 2005-12-16 Renault Sas Dispositif et procede perfectionnes de recyclage de gaz brules
WO2007140148A2 (fr) * 2006-05-24 2007-12-06 Honeywell International Inc. Mélangeur à recyclage de gaz d'échappement
WO2007140148A3 (fr) * 2006-05-24 2008-01-24 Honeywell Int Inc Mélangeur à recyclage de gaz d'échappement
US7568340B2 (en) 2006-05-24 2009-08-04 Honeywell International, Inc. Exhaust gas recirculation mixer
EP2218897A1 (fr) * 2009-02-12 2010-08-18 Behr GmbH & Co. KG Dispositif de recirculation de gaz d'échappement pour un moteur à combustion interne
EP2402585A1 (fr) * 2009-02-12 2012-01-04 Behr GmbH & Co. KG Dispositif de récupération de gaz d'échappement pour un moteur à combustion
US8534267B2 (en) 2009-02-12 2013-09-17 Behr Gmbh & Co. Kg Device for exhaust gas recirculation for a combustion engine
FR2954412A1 (fr) * 2009-12-22 2011-06-24 Valeo Sys Controle Moteur Sas Moteur a combustion interne integrant un dispositif de recirculation des gaz d'echappement
WO2011076900A1 (fr) * 2009-12-22 2011-06-30 Valeo Systemes De Controle Moteur Moteur a combustion interne integrant un dispositif de recirculation des gaz d'echappement
US8056340B2 (en) * 2010-08-17 2011-11-15 Ford Global Technologies, Llc EGR mixer for high-boost engine systems
CN103038477A (zh) * 2011-01-19 2013-04-10 三菱重工业株式会社 增压器及具备该增压器的柴油机
US20120227399A1 (en) * 2011-03-11 2012-09-13 International Engine Intellectual Property Company, Llc In-flow air injection housing
US20120260895A1 (en) * 2011-04-13 2012-10-18 GM Global Technology Operations LLC Internal combustion engine
US8915081B2 (en) * 2011-04-13 2014-12-23 GM Global Technology Operations LLC Internal combustion engine
CN103256149A (zh) * 2013-05-27 2013-08-21 奇瑞汽车股份有限公司 一种提高汽油机废气再循环各缸均匀性的装置及方法
CN103256149B (zh) * 2013-05-27 2016-04-27 奇瑞汽车股份有限公司 一种提高汽油机废气再循环各缸均匀性的装置及方法
EP3009652B1 (fr) * 2014-09-30 2018-06-06 Kubota Corporation Collecteur d'admission d'un moteur à plusieurs cylindres
CN108150316A (zh) * 2017-12-25 2018-06-12 潍柴动力股份有限公司 Egr混合装置及内燃机
CN108104986A (zh) * 2017-12-27 2018-06-01 潍柴动力股份有限公司 发动机及其混合进气装置
WO2019127098A1 (fr) * 2017-12-27 2019-07-04 潍柴动力股份有限公司 Moteur et son dispositif d'admission de gaz mixte
US11002227B2 (en) 2017-12-27 2021-05-11 Weichai Power Co., Ltd. Engine and mixed-gas intake device thereof
CN108104986B (zh) * 2017-12-27 2023-12-15 潍柴动力股份有限公司 发动机及其混合进气装置
CN114673611A (zh) * 2022-04-14 2022-06-28 中国第一汽车股份有限公司 废气再循环混合装置、废气再循环系统及车辆

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Publication number Publication date
DE60018041D1 (de) 2005-03-17
EP1152141B1 (fr) 2005-02-09
DE60018041T2 (de) 2005-07-28

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