EP2466103B1 - Module de recirculation des gaz d'échappement pour un moteur à combustion interne - Google Patents

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

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Publication number
EP2466103B1
EP2466103B1 EP11186703.2A EP11186703A EP2466103B1 EP 2466103 B1 EP2466103 B1 EP 2466103B1 EP 11186703 A EP11186703 A EP 11186703A EP 2466103 B1 EP2466103 B1 EP 2466103B1
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EP
European Patent Office
Prior art keywords
exhaust gas
gas recirculation
housing
ducts
combustion engine
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.)
Active
Application number
EP11186703.2A
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German (de)
English (en)
Other versions
EP2466103A2 (fr
EP2466103A3 (fr
Inventor
Hans-Ulrich Kühnel
Hans-Jürgen Hüsges
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.)
Pierburg GmbH
Original Assignee
Pierburg GmbH
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Filing date
Publication date
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Publication of EP2466103A2 publication Critical patent/EP2466103A2/fr
Publication of EP2466103A3 publication Critical patent/EP2466103A3/fr
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Publication of EP2466103B1 publication Critical patent/EP2466103B1/fr
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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
    • F02M26/39—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with two or more EGR valves disposed in series
    • 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
    • F02M26/23—Layout, e.g. schematics
    • F02M26/25—Layout, e.g. schematics with coolers having bypasses
    • F02M26/26—Layout, e.g. schematics with coolers having bypasses characterised by details of the bypass 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
    • F02M26/38—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with two or more EGR valves disposed in parallel
    • 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 invention relates to an exhaust gas recirculation module for an internal combustion engine having two exhaust gas recirculation channels, two control valve bodies which control two formed in an exhaust gas recirculation fürströmungsquerroughe the exhaust gas recirculation channels, two exhaust gas cooling channels, which are in heat exchange with a coolant channel, each of the two exhaust gas recirculation channels are fluidly connected to one of the exhaust gas cooling channels , Two bypass channels through which the exhaust gas cooling channels are bypassed and two bypass valves, which are each operable via a separate actuator and can be opened or closed via the optional flow cross-section to the bypass channels or to the exhaust gas cooling channels.
  • Such exhaust gas recirculation modules are known and serve in a known manner to reduce pollutant emissions.
  • the exhaust gas is supplied to the engine again during the warm-up phase via bypass ducts.
  • cooler bypassing of the low-load radiators is becoming increasingly common, as many exhaust-gas recirculation coolers of turbocharged engines are designed for a high cooling load point, which could result in overcooling.
  • cooling systems which have a plurality of coolers which can be individually bypassed via bypass lines, so that the most optimal operating point can be traveled.
  • cooling systems can be used.
  • the object of the invention is therefore to provide an exhaust gas recirculation module, which is carried out as possible space-reducing, the number of components and the assembly steps should decrease. In particular, it should be possible to pre-assemble the system. At the same time the best possible controllability should be maintained.
  • bypass valves are arranged in a common exhaust gas recirculation housing, in which the two separate exhaust gas recirculation channels are formed and from which extend the bypass channels and the exhaust gas cooling channels, the assembly is significantly simplified. At the same time, the number of components to be used decreases. Nevertheless, a single switching of the bypass channels remains possible, so that overcooling can be prevented.
  • the bypass valves each have a valve body arranged on a shaft, wherein the shafts are mounted in the exhaust gas recirculation housing.
  • the use of flaps as a control body allows the control of large volume flows and release of large cross sections.
  • the storage in the exhaust gas recirculation housing reduces the component expenditure, whereby the flaps can be mounted in advance in the housing.
  • the actuators of the bypass valves are pneumatically actuated, whereby the control effort is reduced. Furthermore, pneumatic actuators have a long service life.
  • the two exhaust gas cooling channels are formed in a heat exchanger housing, on the downstream two check valves are arranged, in which open the two exhaust gas cooling channels.
  • a common coolant channel can be used. It eliminates extra components, reducing weight is reduced. The recyclable exhaust gas mass flow is increased by the check valves since backflow due to pulsations is avoided.
  • bypass channels open upstream of the check valves in the exhaust gas cooling channels.
  • an exhaust gas recirculation flap is arranged as a control valve body in the exhaust gas recirculation housing in both exhaust gas recirculation channels, via which the flow cross sections of the exhaust gas recirculation channels are controllable, wherein the two exhaust gas recirculation flaps are arranged on a common shaft which is actuated via a common actuator.
  • This total actuator can be used to regulate a total amount to be returned.
  • the different cylinder groups remain separated over the entire running distance. Since no additional housing parts must be used, the structure remains compact with few and vorzumontierenden parts and can be mounted with little effort.
  • the exhaust gas recirculation housing is formed in two parts, wherein the bearing points of the shaft of the exhaust gas recirculation valves are formed in the second flange-shaped part and the bearing points of the waves of the bypass valves are formed in the first part, wherein on the upstream side of the first part, the second part of the Exhaust gas recirculation housing is attached.
  • the heat exchanger housing is fixed downstream of the exhaust gas recirculation housing and has a partition wall, via which the two exhaust gas channels are separated from each other.
  • the partition wall is used as a common wall.
  • the exhaust gas recirculation module has a coolant channel which extends through the heat exchanger housing into the exhaust gas recirculation housing, so that the exhaust gas recirculation housing is cooled, which on the one hand increases the overall cooling efficiency and on the other hand also protects the actuators against overheating.
  • This module is particularly suitable for the return of exhaust gas in internal combustion engines with high back pressure from the air inlet side, since even with these conditions, a sufficient amount of exhaust gas can be attributed by using the pressure peaks of the exhaust gas.
  • the exhaust gas recirculation module according to the invention shown in the figures consists of a total of four outer housing parts, of which a first housing part is an exhaust gas recirculation housing 2, a second housing part is a heat exchanger housing 4, a third housing part is an aftercooler housing 6 and a fourth housing part is a check valve housing 8, at its end a collection tube 10 is formed.
  • two exhaust gas recirculation channels 12 are formed, of which in the FIG. 2 only one can be seen, and two flow cross sections 14 of the exhaust gas recirculation channels 12, which are both controlled by an exhaust gas recirculation valve 16, which consists of two control valve bodies 18 in the form of arranged on a common shaft 20 exhaust gas recirculation flaps 22 and an electric actuator 24.
  • the inlet 26 is designed as a flange, via which the module can be flanged directly to an engine block or an exhaust manifold, not shown, wherein two exhaust gas flows of two cylinder groups are executed separately in the engine block or exhaust manifold, so that a Exhaust gas flow is connected to the first exhaust gas recirculation passage 12 and the second exhaust gas flow to the second exhaust passage.
  • the shaft 20, on which the exhaust gas recirculation flaps 22 are mounted, is mounted in the exhaust gas recirculation housing 2 and rotatable by means of the electromotive actuator 24 via a coupling linkage 30.
  • the shaft 20 is surrounded outside the housing 2 by a return spring 32, via which the exhaust gas recirculation flaps 22 are rotated in their closing the flow cross-sections 14 closing position in case of failure of the actuator 24.
  • a coolant channel 34 is additionally formed, via which the thermally highly stressed housing 2 is cooled and in particular the actuator 24 is protected from thermal overload.
  • coolant tubes 36 which allow the coolant from the Side of the outlet 28 to the exhaust gas recirculation valves 22 and can be performed around them, so that a good thermal decoupling is achieved, which is further reinforced in that the exhaust gas recirculation housing 2 is made in two parts, wherein the first part 38, in which the bearings 39 are arranged for the shaft 20 of the exhaust gas recirculation valve 16 and the regulated flow cross sections 14, is formed substantially as an extended flange which is flanged to the second part 40, to which the actuator 24 and the coolant tubes 36 are mounted.
  • the first part 38 has a coolant channel 34 extending on both sides of the shaft 20, which extends via bores into the exhaust gas recirculation housing 2 and the coolant tubes 36 and the coolant jacket.
  • the first part 38 and the second part 40 of the Exhaust gas recirculation housing 2 are fastened to one another via flanges with the interposition of a seal.
  • bypass valves 42, 43 are arranged in the exhaust gas recirculation housing 2, each consisting of a valve body 44, 45 which is mounted on a shaft 46, 47 mounted in the exhaust gas recirculation housing 2, which via a lever 48, 49 by means of a respective pneumatic actuator 50, 51 is actuated, which in turn is attached to the exhaust gas recirculation valve housing 2, as shown FIG. 3 is apparent.
  • the flap body 44, 45 interact depending on their position with one of two valve seats 52, 54 which either a flow cross-section to one of two formed within the heat exchanger housing 4 exhaust gas cooling channels 56 or to one of two bypass channels 58, 60, which as tubes on Heat exchanger housing 4 are passed.
  • Each of the two actuators 50, 51 is separately switchable, so that, for example, the exhaust gas of a first cylinder group is returned cooled, while the exhaust gas of the second cylinder group is returned uncooled.
  • the temperature of the engine can be slightly raised, if the optimum operating temperature is otherwise not reached.
  • the exhaust gas recirculation housing 2 is fastened via a flange connection 62 on the heat exchanger housing 4, for example, with the interposition of a seal, not shown.
  • a partition wall arranged separate exhaust gas cooling channels 56 whose outer walls serve as a separation to the coolant jacket 34 which is formed between the exhaust gas cooling channels 56 and the heat exchanger housing 4.
  • the partition wall forms an extension to the partition wall between the exhaust gas recirculation channels 12 in the exhaust gas recirculation housing 2.
  • the fluid connection between the coolant channels 34 of the exhaust gas recirculation valve housing 2 and the coolant jacket in the heat exchanger housing 4 is also produced via the flange connection.
  • the aftercooler housing 6 is attached to the exhaust gas recirculation housing 2 opposite side of the heat exchanger housing 4, which in turn is connected via a flange to the check valve housing 8, in the interior of which two exhaust gas check valves are arranged, to which the separation of the two exhaust gas cooling channels 56 is continued so that each exhaust gas cooling channel 56 opens into an exhaust gas check valve which is not visible in the figures but is generally known.
  • the check valve housing 8 opens into a manifold 10, in which the two exhaust gas streams are first mixed and in which an exhaust gas mass flow sensor 64 is arranged.
  • the two bypass channels 58, 60 open in the present embodiment in the manifold 10, wherein to maintain the high exhaust gas recirculation rates by suppressing the return flow by means of the check valves, an introduction in the aftercooler would be advantageous.
  • the two exhaust gas streams are first precooled in the exhaust gas recirculation housing 2 and the exhaust gas quantity is adjusted via the opening width of the flow cross sections 14 by means of the exhaust gas recirculation flaps 22 in accordance with a control command on the actuator 24.
  • the further flowing exhaust gas is still separated and cooled down either via the exhaust gas cooling channels 56 or it passes uncooled but also separated from each other via the bypass channels 58, 60 in the manifold. From the exhaust gas cooling channels 56, the exhaust gas reaches the check valves.
  • This exhaust gas is cooled, partially cooled or uncooled the distributor rail and thus the internal combustion engine again made available, which again serves to reduce pollutants, since the best possible exhaust gas temperature can be adjusted with the one hand, a sufficient engine temperature to ensure good oil lubrication and on the other hand relatively low Combustion temperatures can be generated.
  • the module can be installed as a unit pre-assembled on the internal combustion engine. Despite the various integrated functions, it only requires a very small installation space with different control functions.

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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)

Claims (9)

  1. Module de recirculation des gaz d'échappement pour un moteur à combustion interne, avec
    deux conduits de recirculation des gaz d'échappement (12),
    deux corps de vanne de régulation (18) commandant deux sections transversales d'écoulement (14) des conduits de recirculation des gaz d'échappement (12), formées dans un boitier de recirculation des gaz d'échappement,
    deux conduits de refroidissement des gaz d'échappement (56) en échange thermique avec un conduit de liquide de refroidissement (34),
    chacun des deux conduits de recirculation des gaz d'échappement (12) étant en communication fluidique avec un, respectivement, des conduits de refroidissement des gaz d'échappement (56),
    deux conduits de dérivation (58, 60) par lesquels les conduits de refroidissement des gaz d'échappement (56) peuvent être contournés,
    et deux vannes de dérivation (42, 43), chacune actionnable par un actionneur (50, 51) séparé et par lesquelles, sélectivement, l'on libère ou ferme la section transversale d'écoulement (14) vers les conduits de dérivation (58, 60) ou vers les conduits de refroidissement des gaz d'échappement (56),
    caractérisé en ce que
    les vannes de dérivation (42, 43) sont disposées dans un boitier de recirculation des gaz d'échappement (2) commun, dans lequel les deux conduits de recirculation des gaz d'échappement (12) séparés sont formés et à partir duquel les conduits de dérivation (58, 60) et les conduits de refroidissement des gaz d'échappement (56) s'étendent.
  2. Module de recirculation des gaz d'échappement pour un moteur à combustion interne selon la revendication 1, caractérisé en ce que chaque vanne de dérivation (42, 43) comporte un corps de clapet (44, 45) disposé sur un arbre (46, 47), les arbres (46, 47) étant supportés dans le boitier de recirculation des gaz d'échappement (2).
  3. Module de recirculation des gaz d'échappement pour un moteur à combustion interne selon l'une des revendications 1 ou 2, caractérisé en ce que les actionneurs (50, 51) des vannes de dérivation (42, 43) peuvent être actionnées de manière pneumatique.
  4. Module de recirculation des gaz d'échappement pour un moteur à combustion interne selon l'une quelconque des revendications précédentes, caractérisé en ce que les deux conduits de refroidissement des gaz d'échappement (56) sont formés dans un boitier d'un échangeur thermique (4), sur lequel deux clapets anti-retour sont disposés en aval, dans lesquels les deux conduits de refroidissement des gaz d'échappement (56) s'ouvrent.
  5. Module de recirculation des gaz d'échappement pour un moteur à combustion interne selon la revendication 4, caractérisé en ce que les conduits de dérivation (58, 60) s'ouvrent dans les conduits de refroidissement des gaz d'échappement (56) en amont des clapets anti-retour.
  6. Module de recirculation des gaz d'échappement pour un moteur à combustion interne selon l'une quelconque des revendications précédentes, caractérisé en ce que dans le boitier de recirculation des gaz d'échappement (2), un clapet de recirculation des gaz d'échappement (22) est respectivement disposé dans les deux conduits de recirculation des gaz d'échappement (12), servant comme corps de vanne de régulation (18), par lesquels clapets les sections transversales d'écoulement (14) des deux conduits de recirculation des gaz d'échappement (12) peuvent être régulés, les deux clapets de recirculation des gaz d'échappement (22) étant disposés sur un arbre commun (20) actionnable par un actionneur (24) commun.
  7. Module de recirculation des gaz d'échappement pour un moteur à combustion interne selon la revendication 6, caractérisé en ce que le boitier de recirculation des gaz d'échappement (2) est réalisé en deux parties, les points de support (39) de l'arbre (20) des clapets de recirculation des gaz d'échappement (22) étant formés dans la deuxième partie (38) en forme de bride, et les points de support des arbres (46, 47) des vanne de dérivation (42, 43) étant formés dans la première partie (38), la deuxième partie (40) du boitier de recirculation des gaz d'échappement (2) étant montée sur le côté amont de la première partie (38).
  8. Module de recirculation des gaz d'échappement pour un moteur à combustion interne selon l'une quelconque des revendications 4 à 7, caractérisé en ce qu'un boitier d'échangeur thermique (4) est monté en aval sur le boitier de recirculation des gaz d'échappement (2) et comprend une paroi de séparation par laquelle les deux conduits de refroidissement des gaz d'échappement (56) sont séparés.
  9. Module de recirculation des gaz d'échappement pour un moteur à combustion interne selon l'une quelconque des revendications précédentes, caractérisé en ce que le module de recirculation des gaz d'échappement comprend un conduit de liquide de refroidissement (34) s'étendant à travers le boitier d'échangeur thermique (4) dans le boitier de recirculation des gaz d'échappement (2).
EP11186703.2A 2010-12-17 2011-10-26 Module de recirculation des gaz d'échappement pour un moteur à combustion interne Active EP2466103B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010055027A DE102010055027A1 (de) 2010-12-17 2010-12-17 Abgasrückführmodul für eine Verbrennungskraftmaschine

Publications (3)

Publication Number Publication Date
EP2466103A2 EP2466103A2 (fr) 2012-06-20
EP2466103A3 EP2466103A3 (fr) 2015-12-09
EP2466103B1 true EP2466103B1 (fr) 2017-12-06

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EP11186703.2A Active EP2466103B1 (fr) 2010-12-17 2011-10-26 Module de recirculation des gaz d'échappement pour un moteur à combustion interne

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EP (1) EP2466103B1 (fr)
DE (1) DE102010055027A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016200371B4 (de) 2016-01-14 2018-12-13 Bayerische Motoren Werke Aktiengesellschaft Bypassklappe für einen Abgas-Rückführ-Kühler
DE102016200326B4 (de) 2016-01-14 2018-01-04 Bayerische Motoren Werke Aktiengesellschaft Abgas-Rückführ-Kühler

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19734801A1 (de) * 1997-08-12 1999-02-18 Pierburg Ag Abgasrückführsystem für eine Brennkraftmaschine mit einem Turbolader
BR0300426A (pt) * 2003-02-27 2004-11-03 Wahler Metalurgica Ltda Conjunto válvula defletora de gás
FR2890698B1 (fr) * 2005-09-12 2010-12-10 Valeo Systemes Thermiques Module d'echange de chaleur pour la regulation en temperature d'un melange de gaz admis dans un moteur thermique de vehicule automobile
CN101415933B (zh) * 2006-03-22 2012-06-20 博格华纳公司 一体式的充气和排气再循环阀
US7987836B2 (en) 2007-10-18 2011-08-02 Ford Global Technologies, Llc Multi-cooler EGR cooling
DE102008033823B4 (de) * 2008-07-19 2013-03-07 Pierburg Gmbh Abgasrückführvorrichtung für eine Verbrennungskraftmaschine

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* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP2466103A2 (fr) 2012-06-20
DE102010055027A1 (de) 2012-06-21
EP2466103A3 (fr) 2015-12-09

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