EP0916837B2 - Dispositif de recirculation de gaz d'échappement pour un moteur à combustion - Google Patents

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

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Publication number
EP0916837B2
EP0916837B2 EP98119748A EP98119748A EP0916837B2 EP 0916837 B2 EP0916837 B2 EP 0916837B2 EP 98119748 A EP98119748 A EP 98119748A EP 98119748 A EP98119748 A EP 98119748A EP 0916837 B2 EP0916837 B2 EP 0916837B2
Authority
EP
European Patent Office
Prior art keywords
exhaust gas
valve
gas recirculation
recirculation cooler
regulating element
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.)
Expired - Lifetime
Application number
EP98119748A
Other languages
German (de)
English (en)
Other versions
EP0916837A2 (fr
EP0916837B1 (fr
EP0916837A3 (fr
Inventor
Matthias Dipl.-Ing. Banzhaf
Martin Dipl.-Ing. Bauer (FH)
Osman Sari
Gérard Dietz
Helmut Blank
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
Mahle Behr GmbH and Co KG
Original Assignee
Pierburg GmbH
Behr GmbH and Co KG
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
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Application filed by Pierburg GmbH, Behr GmbH and Co KG filed Critical Pierburg GmbH
Publication of EP0916837A2 publication Critical patent/EP0916837A2/fr
Publication of EP0916837A3 publication Critical patent/EP0916837A3/fr
Publication of EP0916837B1 publication Critical patent/EP0916837B1/fr
Application granted granted Critical
Publication of EP0916837B2 publication Critical patent/EP0916837B2/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
    • F02M26/12—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems characterised by means for attaching parts of an EGR system to each other or to engine parts
    • 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
    • F02M26/52—Systems for actuating EGR valves
    • F02M26/53—Systems for actuating EGR valves using electric actuators, e.g. solenoids

Definitions

  • the invention relates to a device for exhaust gas recirculation for an internal combustion engine with an exhaust gas cooler, which has a flow path for a liquid coolant and a flow path for exhaust gas and with the recirculated exhaust gas amount determining, adjustable by means of an actuator valve, wherein the exhaust gas cooler and the valve directly adjoin one another and form a structural unit.
  • EGR valve exhaust gas recirculation valve
  • exhaust gas cooler exhaust gas heat exchanger
  • U.S.-A-4,134,377 connect the adjustable by means of an actuating element valve and the exhaust gas cooler directly to each other and form a unit.
  • a valve body is provided, which forms a distribution chamber for incoming exhaust gas, which is arranged upstream of an exhaust gas cooler. After the exhaust gas cooler, the valve body forms a second chamber into which the cooled exhaust gas flows.
  • an actuator for the valve is arranged on a wall of the valve body which defines this collection chamber.
  • the invention has the object of providing a device of the type mentioned in such a way that the actuator is as little as possible thermally stressed.
  • the adjusting element is mounted on a component which is provided with one or more channels for a liquid coolant.
  • Both embodiments allow the valve to be arranged on the exhaust gas upstream side of the exhaust gas cooler.
  • the arrangement of the valve on the upstream side of the exhaust gas cooler, i. on the side, on which the hot exhaust gas flows, has the advantage that the risk is relatively low that residues of the exhaust gas to the valve and its valve elements set.
  • This danger which is reinforced in an arrangement of the valve after the exhaust gas cooler, causes actuators must be provided with relatively large actuating forces, which can safely overcome a bonding of the valve elements due to deposited exhaust gas residues.
  • the adjusting elements in particular electrical adjusting elements, are thermally overloaded. This thermal overload is counteracted by the fact that the control element is attached to a component whose temperature is significantly lower than the temperature of the coming of the engine exhaust gas.
  • the exhaust gas cooler has an elongated shape, and that the adjusting element is arranged substantially parallel to the exhaust gas cooler. This results in a compact design that is relatively easy to accommodate in a vehicle.
  • Fig. 1 and 2 shown assembly includes an exhaust gas cooler 10 and a valve 11, a so-called EGR valve.
  • the valve 11 and the exhaust gas cooler 10 are preferably arranged as shown in Figure 2 of the above reference, ie, the valve 11 is located on the exhaust gas inlet side of the exhaust gas cooler 10th
  • the valve 11 is provided with a connecting flange 12, with which it can be connected to an exhaust pipe coming from an internal combustion engine.
  • an adjustable valve element is provided in a manner not shown, which is associated with a valve seat.
  • the valve determines the amount of exhaust gas flowing to the exhaust gas cooler 10.
  • the valve element is adjusted by means of an actuating element 13, in particular an electromagnetic actuator.
  • the valve 11 determines the amounts of exhaust gas that are added to the fresh air supplied in the internal combustion engine.
  • the actuator 13 may operate so that it performs a two-point control or a cross-sectional control.
  • the valve 11 is provided with fastening means 14, by means of which it can be fastened to a holder, for example to the engine block of the internal combustion engine.
  • the valve 11 has an approximately funnel-shaped widening distribution chamber 15, by means of which the exhaust gas is supplied to the exhaust gas cooler 10.
  • the exhaust gas cooler 10 is in principle designed as known from the above-mentioned reference (ATZ Automobiltechnische Zeitschrift 99 (1997) 9). He has at its front ends in each case a bottom in which the ends of a plurality of rectangular tubes are inserted, which are arranged one below the other at a distance.
  • the tube bundle of rectangular tubes is surrounded by a jacket 16 which forms circumferential chambers 17, 18 at the two end regions.
  • the chambers 17, 18 are provided with ports 19, 20, is supplied by the coolant of the engine cooling circuit and discharged.
  • the coolant flows parallel to the exhaust gas in the exhaust gas cooler 10, so that the terminal 19 is an inlet port and the terminal 20 is a return port.
  • the valve 11 facing the end of the exhaust gas cooler 10 is provided with a flange 23, which preferably also forms the bottom of the tube bundle of the exhaust gas cooler.
  • the housing of the valve 11 is flanged.
  • the adjusting element 13 is attached next to the exhaust gas cooler 10, which is aligned substantially parallel to the jacket 16 of the exhaust gas cooler.
  • the flange 23 is formed relatively thick-walled, so that it forms a thermal separation between the housing of the valve 11 and the actuating element 13.
  • the flange 23, which is co-cooled by the coolant flowing through the exhaust gas cooler 10, has a significantly lower temperature than the valve housing of the valve 11, so that the adjusting element 13 is thermally separated from the valve 11 and correspondingly only relatively low thermal load.
  • the also formed from an exhaust gas cooler 10 and a valve 11 assembly of the embodiment according to Fig. 3 and 4 corresponds in the basic structure and in the basic arrangement of the embodiment Fig. 1 and 2 ,
  • the exhaust gas cooler 10 is provided with a stronger flange 24 which is provided in a manner not shown with leading from a feed port 25 to the chamber 17 of the shell 16 channels through which the coolant of the engine to the chamber 17 of the exhaust gas cooler 10 out becomes.
  • the flange 24 is therefore actively cooled, so that an even better thermal separation between the valve 11 and the actuating element 13 is obtained.
  • an electromagnetic actuator 13 is provided, which is provided with a connector 26 for the power supply.
  • other control elements are provided, for example, pneumatic control elements that perform the same function. These adjusting elements are then thermally largely separated from the valve, so that they are only exposed to a relatively low temperature load.

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)

Claims (6)

  1. Dispositif de remise en circulation des gaz d'échappement pour un moteur à combustion interne comportant un appareil refroidisseur des gaz d'échappement (10) qui présente un chemin d'écoulement pour du fluide refroidisseur et un chemin d'écoulement pour des gaz d'échappement, ainsi qu'un organe de robinetterie (11) qui détermine la quantité de gaz d'échappement remise en circulation et peut se régler au moyen d'un élément réglant (13), dans lequel l'appareil refroidisseur des gaz d'échappement (10) et l'organe de robinetterie (11) sont directement adjacents l'un à l'autre et forment un sous-ensemble, caractérisé par le fait que l'élément réglant (13) est monté sur un composant (23, 24), à savoir un flasque, de l'appareil refroidisseur des gaz d'échappement (10) qui est refroidi par le fluide refroidisseur qui s'écoule à travers l'appareil refroidisseur des gaz d'échappement (10) et que l'organe de robinetterie (11) est disposé du côté arrivée des gaz d'échappement de l'appareil refroidisseur des gaz d'échappement (10).
  2. Dispositif selon la revendication 1, caractérisé par le fait que
    l'élément réglant (13) est monté sur un composant (24) qui présente un ou plusieurs canaux pour un fluide refroidisseur.
  3. Dispositif selon la revendication 2, caractérisé par le fait que
    le ou les canaux du composant (24) qui porte l'élément réglant (13) se raccordent à une arrivée de fluide refroidisseur (17) dans l'appareil refroidisseur des gaz d'échappement (10).
  4. Dispositif selon une ou plusieurs des revendications 1 à 3, caractérisé par le fait que
    l'appareil refroidisseur des gaz d'échappement (10) présente une forme allongée et que l'élément réglant (13) est disposé essentiellement parallèlement, à côté de l'appareil refroidisseur des gaz d'échappement (10).
  5. Dispositif selon une ou plusieurs des revendications 1 à 4, caractérisé par le fait que
    l'appareil refroidisseur des gaz d'échappement (10) et l'organe de robinetterie (11) sont fixés, par bride, l'un contre l'autre et que l'élément réglant (10) est monté sur un flasque (23, 24) de l'appareil refroidisseur des gaz d'échappement (10).
  6. Dispositif selon l'une des revendications 1 à 5, caractérisé par le fait que
    le corps de l'organe de robinetterie (11) présente des organes de fixation (14) pour fixer le sous-ensemble sur un support.
EP98119748A 1997-11-17 1998-10-22 Dispositif de recirculation de gaz d'échappement pour un moteur à combustion Expired - Lifetime EP0916837B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19750588 1997-11-17
DE19750588.0A DE19750588B4 (de) 1997-11-17 1997-11-17 Vorrichtung zur Abgasrückführung für einen Verbrennungsmotor

Publications (4)

Publication Number Publication Date
EP0916837A2 EP0916837A2 (fr) 1999-05-19
EP0916837A3 EP0916837A3 (fr) 2000-03-08
EP0916837B1 EP0916837B1 (fr) 2002-03-13
EP0916837B2 true EP0916837B2 (fr) 2011-10-26

Family

ID=7848808

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98119748A Expired - Lifetime EP0916837B2 (fr) 1997-11-17 1998-10-22 Dispositif de recirculation de gaz d'échappement pour un moteur à combustion

Country Status (3)

Country Link
US (1) US6213105B1 (fr)
EP (1) EP0916837B2 (fr)
DE (2) DE19750588B4 (fr)

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EP0916837A2 (fr) 1999-05-19
US6213105B1 (en) 2001-04-10
DE59803324D1 (de) 2002-04-18
DE19750588A1 (de) 1999-05-20
EP0916837B1 (fr) 2002-03-13
EP0916837A3 (fr) 2000-03-08
DE19750588B4 (de) 2016-10-13

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