EP1270919A2 - Exhaust gas recirculation system - Google Patents

Exhaust gas recirculation system Download PDF

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Publication number
EP1270919A2
EP1270919A2 EP02008058A EP02008058A EP1270919A2 EP 1270919 A2 EP1270919 A2 EP 1270919A2 EP 02008058 A EP02008058 A EP 02008058A EP 02008058 A EP02008058 A EP 02008058A EP 1270919 A2 EP1270919 A2 EP 1270919A2
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EP
European Patent Office
Prior art keywords
exhaust gas
valve
gas recirculation
exhaust
outlet
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.)
Withdrawn
Application number
EP02008058A
Other languages
German (de)
French (fr)
Other versions
EP1270919A3 (en
Inventor
Osman Sari
Heinrich Dismon
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
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 Pierburg GmbH filed Critical Pierburg GmbH
Publication of EP1270919A2 publication Critical patent/EP1270919A2/en
Publication of EP1270919A3 publication Critical patent/EP1270919A3/en
Withdrawn legal-status Critical Current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
    • F02M26/65—Constructional details of EGR valves
    • F02M26/66—Lift valves, e.g. poppet valves
    • F02M26/69—Lift valves, e.g. poppet valves having two or more valve-closing members
    • 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
    • F02M26/02—EGR systems specially adapted for supercharged engines
    • F02M26/08—EGR systems specially adapted for supercharged engines for engines having two or more intake charge compressors or exhaust gas turbines, e.g. a turbocharger combined with an additional compressor
    • 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
    • F02M26/42—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories having two or more EGR passages; EGR systems specially adapted for engines having two or more cylinders
    • 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
    • F02M26/54—Rotary actuators, e.g. step motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B75/22—Multi-cylinder engines with cylinders in V, fan, or star arrangement

Definitions

  • the invention relates to an exhaust gas recirculation arrangement according to the preamble of the main claim.
  • Exhaust gas recirculation arrangements for improving the exhaust gas quality by reducing the No x emissions are known.
  • the exhaust gas extraction from one exhaust gas line is too low be because the exhaust gas pulsates. Therefore, the exhaust gas must be removed from both lines for the purpose of recirculation to ensure that it is available in sufficient quantity.
  • the invention is therefore based on the object, these opposite requirements by designing an exhaust gas recirculation valve.
  • An internal combustion engine 1 has cylinder banks 2 arranged in a V-shape, from which each lead an exhaust line 3, 4 to a turbocharger 5, 6, respectively a branch line with the same number from the exhaust lines 3, 4 at the same time lead to the inlets 7, 8 of an exhaust gas recirculation valve 9.
  • An outlet pipe 10 of the exhaust gas recirculation valve leads to an intake manifold 11 from which the Cylinder banks 2 are supplied and at the same time the pressure lines 12, 13th the exhaust gas turbocharger 5, 6 open.
  • the exhaust gas recirculation valve 9 is constructed in such a way that it is of any design Servomotor 14 has. This can be pneumatic or electric motor his.
  • the servomotor 14 actuates one as a function of operating parameters 15 Valve rod 16 on which a valve plate 17 is arranged, which is assigned to the outlet 10 is and there sealingly abuts a seat 18 in the closed position.
  • a second valve member 19 is arranged, the a sealing area 20 one of the inlets 8 cooperates.
  • the valve member 19 is gimbaled at the free end of the valve rod 16.

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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)

Abstract

The exhaust gas return system has an exhaust gas return valve (9) with two valve members (17, 19). One of these controls the outlet (10) to the induction manifold, and the other the connection between the two exhaust paths (3, 4). The same valve has inlets (7, 8) to the exhaust paths and an outlet (10) to the induction manifold (11).

Description

Die Erfindung betrifft eine Abgasrückführanordnung nach dem Oberbegriff des Hauptanspruchs. Abgasrückführanordnungen zur Verbesserung der Abgasqualität durch Verringerung des Nox - Ausstoßes sind bekannt. Bei einem Verbrennungsmotor, sei es nach dem Otto- oder nach dem Dieselprinzip, mit zwei getrennten Abgassträngen kann in Abhängigkeit vom Hubraum bei niedriger Drehzahl, bei der zur Verbesserung der Abgasqualität eine höhere Abgasrückführmenge verlangt wird, die Entnahme des Abgases lediglich aus einem Abgasstrang zu gering sein, da das Abgas pulsiert. Daher muß das Abgas zum Zwecke der Rückführung aus beiden Strängen gleichzeitig entnommen werden um sicherzustellen, daß es in ausreichender Menge zur Verfügung steht.The invention relates to an exhaust gas recirculation arrangement according to the preamble of the main claim. Exhaust gas recirculation arrangements for improving the exhaust gas quality by reducing the No x emissions are known. In the case of an internal combustion engine, whether according to the Otto or diesel principle, with two separate exhaust gas lines, depending on the displacement at low engine speed, which requires a higher exhaust gas recirculation quantity to improve the exhaust gas quality, the exhaust gas extraction from one exhaust gas line is too low be because the exhaust gas pulsates. Therefore, the exhaust gas must be removed from both lines for the purpose of recirculation to ensure that it is available in sufficient quantity.

Bei einem Verbrennungsmotor mit zwei Abgassträngen und jeweils einem in diesen angeordneten Turboladern muß andererseits dafür gesorgt werden, daß die beiden Stränge voneinander getrennt sind, um einen überproportionalen Druckaufbau in einem Strang zu vermeiden, da dann der Turbolader im zweiten Antriebstrang zu wenig Antriebsleistung erhält.In an internal combustion engine with two exhaust lines and one in each arranged turbochargers, on the other hand, must ensure that the two strands are separated from each other in order to build up a disproportionate pressure Avoid in one line, since then the turbocharger in the second drive line receives too little drive power.

Der Erfindung liegt daher die Aufgabe zugrunde, diese entgegengesetzten Anforderungen durch die Ausbildung eines Abgasrückführventils zu erfüllen.The invention is therefore based on the object, these opposite requirements by designing an exhaust gas recirculation valve.

Diese Aufgabe ist durch die Ausbildung des Abgasrückführventils nach den Merkmalen des Anspruchs 1) gelöst. Vorteilhafte Ausbildungen sind in den weiteren Ansprüchen angegeben.This task is through the formation of the exhaust gas recirculation valve according to the Features of claim 1) solved. Advantageous training courses are in the others Claims specified.

Die Figur zeigt schematisch eine Abgasrückführanordnung nach der Erfindung. The figure shows schematically an exhaust gas recirculation arrangement according to the invention.

Ein Verbrennungsmotor 1 weist V-förmig angeordnete Zylinderbänke 2 auf, von denen jeweils ein Abgasstrang 3, 4 zu jeweils einem Turbolader 5, 6 führen, wobei gleichzeitig von den Abgassträngen 3, 4 eine Zweigleitung mit der gleichen Nummer zu den Einlässen 7, 8 eines Abgasrückführventiles 9 führen. Eine Auslaßleitung 10 des Abgasrückführventils führt zu einem Saugrohr 11 von dem aus die Zylinderbänke 2 versorgt werden und in das gleichzeitig die Druckleitungen 12, 13 der Abgasturbolader 5, 6 einmünden.An internal combustion engine 1 has cylinder banks 2 arranged in a V-shape, from which each lead an exhaust line 3, 4 to a turbocharger 5, 6, respectively a branch line with the same number from the exhaust lines 3, 4 at the same time lead to the inlets 7, 8 of an exhaust gas recirculation valve 9. An outlet pipe 10 of the exhaust gas recirculation valve leads to an intake manifold 11 from which the Cylinder banks 2 are supplied and at the same time the pressure lines 12, 13th the exhaust gas turbocharger 5, 6 open.

Das Abgasrückführventil 9 ist derart aufgebaut, daß es einen beliebig ausgebildeten Stellmotor 14 aufweist. Dieser kann pneumatisch oder elektromotorisch sein. Der Stellmotor 14 betätigt in Abhängigkeit von Betriebsparametern 15 eine Ventilstange 16 an der ein Ventilteller 17 angeordnet ist, der dem Auslaß 10 zugeordnet ist und dort in der Schließposition an einem Sitz 18 dichtend anliegt. Am freien Ende der Ventilstange 17 ist ein zweites Ventilglied 19 angeordnet, das mit einem Dichtungsbereich 20 eines der Einlässe 8 zusammenwirkt. Um eine Überbestimmung durch zwei mechanische Anschläge zu vermeiden, ist beispielsweise das Ventilglied 19 am freien Ende der Ventilstange 16 kardanisch angeordnet. Dabei wird eine geringe Leckmenge von Abgas aus dem Einlaß 8 in die Ventilkammer 21 in Kauf genommen, auch wenn sich dort diese Leckmenge mit dem Abgas des Einlasses 7 vermischen kann. Die Leckmenge kann jedoch als so geringfügig angesehen werden, daß in dem Abgasstrang 7 kein wesentlich erhöhter Druckaufbau erfolgt, der zu einer ungleichen Leistung zwischen den Turboladern 5 und 6 führt.The exhaust gas recirculation valve 9 is constructed in such a way that it is of any design Servomotor 14 has. This can be pneumatic or electric motor his. The servomotor 14 actuates one as a function of operating parameters 15 Valve rod 16 on which a valve plate 17 is arranged, which is assigned to the outlet 10 is and there sealingly abuts a seat 18 in the closed position. At the Free end of the valve rod 17, a second valve member 19 is arranged, the a sealing area 20 one of the inlets 8 cooperates. To overdetermination To avoid by two mechanical stops, for example the valve member 19 is gimbaled at the free end of the valve rod 16. This causes a small amount of leakage of exhaust gas from the inlet 8 into the valve chamber 21 accepted, even if there is this leakage amount with the Exhaust gas of the inlet 7 can mix. However, the leakage rate can be as minor can be seen that in the exhaust line 7 no significantly increased Pressure builds up, resulting in uneven performance between the turbochargers 5 and 6 leads.

Bei Betätigung des Abgasrückführventils 9 in Öffnungsrichtung können sich innerhalb des Ventils die Abgase beider Zylinderbänke vermischen, so daß ein wenig pulsierendes Abgas in ausreichender Menge zur Rückführung zur Verfügung steht. Bei geschlossenem Ventil sind die Abgasleitungen 3, 4 durch das Ventilglied 19 voneinander getrennt.When the exhaust gas recirculation valve 9 is actuated in the opening direction, inside of the valve mix the exhaust gases of both cylinder banks, so that a little pulsating exhaust gas is available in sufficient quantities for recirculation stands. When the valve is closed, the exhaust pipes 3, 4 are through the valve member 19 separated from each other.

An dem freien Ende der Ventilstange 16 könnte auch ein kolbenförmiges Ventilglied (nicht dargestellt) ausgebildet sein, das in eine zylindrische Bohrung am ventilseitigen Ende des Einlasses 8 (ebenfalls nicht dargestellt) einführbar ist. Auch hierbei wird durch einen verbleibenden Ringspalt zwischen dem Kolben und der Bohrung eine gewisse Leckmenge austreten, die jedoch in Abhängigkeit von Breite und Länge des Ringspaltes weiter reduzierbar ist.At the free end of the valve rod 16, a piston-shaped valve member could also be used (Not shown) be formed, which in a cylindrical bore valve-side end of the inlet 8 (also not shown) is insertable. Here too, a remaining annular gap between the piston and a certain amount of leakage will leak out of the bore, depending on The width and length of the annular gap can be further reduced.

Claims (3)

Abgasrückführanordnung für einen Verbrennungsmotor (1) mit einem Saugrohr (11) und zwei getrennten Abgasleitungen (3, 4), denen Abgas mittels eines Abgasrückführventils (9) entnommen und dem Saugrohr (11) in Abhängigkeit von Betriebsparametern (15) zugeführt wird, dadurch gekennzeichnet, daß ein gemeinsames Abgasrückführventil (9) je Abgasleitung (3, 4) einen Einlaß (7,8) und zum Saugrohr (11) einen Auslaß (10) aufweist, wobei der Auslaß (10) von einem dichtend an seinem Sitz (18) anlegbaren Ventilteller (17) beherrscht wird, der fest mit einer von einem Stellmotor (14) antreibbaren Ventilstange (16) verbunden ist und an deren freien Ende ein zweites Ventilglied (19) angeordnet ist, das mit einem Dichtungsbereich (20) eines der Einlässe (8) zusammenwirkt.Exhaust gas recirculation arrangement for an internal combustion engine (1) with a suction pipe (11) and two separate exhaust-gas lines (3, 4), which taken from exhaust gas by means of an exhaust gas recirculation valve (9) and the suction pipe (11) is supplied as a function of operating parameters (15), characterized in that a common exhaust gas recirculation valve (9) depending on the exhaust gas line (3, 4) having an inlet (7,8) and to the intake manifold (11) having an outlet (10), said outlet (10) from a sealing contact with its seat (18) valve disc (17) that can be put on, is firmly connected to a valve rod (16) that can be driven by a servomotor (14), and at the free end of which a second valve member (19) is arranged, which has a sealing area (20) of one of the inlets ( 8) interacts. Abgasrückführventilanordnung nach Anspruch 1, dadurch gekennzeichnet, daß das zweite Ventilglied (19) als kardanisch an der Ventilstange (16) aufgehängter Ventilteller ausgebildet ist.Exhaust gas recirculation valve arrangement according to claim 1, characterized in that the second valve member (19) is designed as a gimbal-mounted valve plate on the valve rod (16). Abgasrückführanordnung nach Anspruch 1, dadurch gekennzeichnet, daß das zweite Ventilglied kolbenförmig ausgebildet ist und unter Beibehaltung eines Ringspalts in eine zylindrische Bohrung am ventilseitigen Ende des Einlasses (8) einführbar ist.Exhaust gas recirculation arrangement according to claim 1, characterized in that the second valve member is piston-shaped and can be inserted into a cylindrical bore at the valve-side end of the inlet (8) while maintaining an annular gap.
EP02008058A 2001-06-25 2002-04-11 Exhaust gas recirculation system Withdrawn EP1270919A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10130013 2001-06-25
DE10130013A DE10130013A1 (en) 2001-06-25 2001-06-25 Exhaust gas recirculation arrangement

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EP1270919A2 true EP1270919A2 (en) 2003-01-02
EP1270919A3 EP1270919A3 (en) 2006-05-17

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EP02008058A Withdrawn EP1270919A3 (en) 2001-06-25 2002-04-11 Exhaust gas recirculation system

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DE (1) DE10130013A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2858013A1 (en) * 2003-07-22 2005-01-28 Renault Sa Internal combustion engine for motor vehicle, has single exhaust gas recirculation valve including inlets connected to corresponding gas recirculation circuit and outlet connected to corresponding intake pipe

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10234845A1 (en) * 2002-07-31 2004-02-19 Daimlerchrysler Ag Internal combustion engine with exhaust return has valve housing with mixing chamber with two exhaust gas inlet apertures and one exhaust gas outlet aperture
DE102014117309B4 (en) 2014-11-26 2021-02-04 Pierburg Gmbh Valve device for exhaust gas recirculation on an internal combustion engine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19539921C1 (en) * 1995-10-26 1997-02-27 Ranco Inc Exhaust-gas recirculation valve
US6006732A (en) * 1998-09-03 1999-12-28 Navistar International Transportation Corp Balanced flow EGR control apparatus
DE19951591C1 (en) * 1999-10-27 2001-01-04 Daimler Chrysler Ag Exhaust gas return device for internal combustion engines has two exhaust flows sealed from each other in all valve positions by sealing element as axial guide element between valve plates

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06147025A (en) * 1992-11-11 1994-05-27 Toyota Motor Corp Exhaust reflux device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19539921C1 (en) * 1995-10-26 1997-02-27 Ranco Inc Exhaust-gas recirculation valve
US6006732A (en) * 1998-09-03 1999-12-28 Navistar International Transportation Corp Balanced flow EGR control apparatus
DE19951591C1 (en) * 1999-10-27 2001-01-04 Daimler Chrysler Ag Exhaust gas return device for internal combustion engines has two exhaust flows sealed from each other in all valve positions by sealing element as axial guide element between valve plates

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN Bd. 018, Nr. 465 (M-1665), 30. August 1994 (1994-08-30) -& JP 06 147025 A (TOYOTA MOTOR CORP), 27. Mai 1994 (1994-05-27) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2858013A1 (en) * 2003-07-22 2005-01-28 Renault Sa Internal combustion engine for motor vehicle, has single exhaust gas recirculation valve including inlets connected to corresponding gas recirculation circuit and outlet connected to corresponding intake pipe

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Publication number Publication date
EP1270919A3 (en) 2006-05-17
DE10130013A1 (en) 2003-01-02

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