EP1223331B1 - Exhaust recirculation device for an internal combustion engine - Google Patents

Exhaust recirculation device for an internal combustion engine Download PDF

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Publication number
EP1223331B1
EP1223331B1 EP01124739A EP01124739A EP1223331B1 EP 1223331 B1 EP1223331 B1 EP 1223331B1 EP 01124739 A EP01124739 A EP 01124739A EP 01124739 A EP01124739 A EP 01124739A EP 1223331 B1 EP1223331 B1 EP 1223331B1
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EP
European Patent Office
Prior art keywords
exhaust gas
recirculation device
switching element
gas recirculation
internal combustion
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
EP01124739A
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German (de)
French (fr)
Other versions
EP1223331A3 (en
EP1223331A2 (en
Inventor
Osman Sari
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
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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 EP1223331A2 publication Critical patent/EP1223331A2/en
Publication of EP1223331A3 publication Critical patent/EP1223331A3/en
Application granted granted Critical
Publication of EP1223331B1 publication Critical patent/EP1223331B1/en
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
    • F02M26/65—Constructional details of EGR valves
    • F02M26/70—Flap valves; Rotary valves; Sliding valves; Resilient valves
    • 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
    • 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
    • F02M26/11—Manufacture or assembly of EGR systems; Materials or coatings specially adapted for EGR systems
    • 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
    • F02M26/50—Arrangements or methods for preventing or reducing deposits, corrosion or wear caused by impurities

Definitions

  • the invention relates to an exhaust gas recirculation device for an internal combustion engine with an exhaust manifold coming from an exhaust system of the internal combustion engine, the fluidically via a rotary valve with air intake ducts of the Internal combustion engine is in communication, wherein the rotary valve a housing has a disk-shaped attached to a rotation axis Switching element corresponding to a control surface having openings, which exhaust control channels are assigned.
  • Such an exhaust gas recirculation device is known, for example, from DE-A1-199 41 035 known.
  • This document describes an exhaust gas recirculation device, the interacts directly with the air inlet ducts of the internal combustion engine.
  • a switching element of an exhaust gas recirculation valve is characterized by a along the Air intake ducts extending drive shaft adjustable. This embodiment takes up a relatively large amount of space and is also susceptible to faults external influences.
  • an exhaust gas recirculation device in which a Exhaust manifold via a rotary valve fluidly with an air inlet duct is connectable.
  • the rotary valve has a housing, on which a Drive module is mounted for actuating the rotary valve.
  • a disc-shaped Switching element corresponds to a control surface, which has an opening through which the fluidic connection by turning the Switching element can be produced.
  • the drive module is via a coupling member with the axis of rotation of Switching element connected.
  • the openings of the control surface prefferably have geometric shape, such. circular, elliptical, angular, etc. such, that a certain flow characteristic can be defined.
  • ceramics As a material for the control surfaces, ceramics has proven to be advantageous.
  • the disc-shaped switching element shown in the example is for a Four-cylinder internal combustion engine in cross-section circular with corresponding Passage openings or cross-shaped.
  • FIG. 1 shows a perspective view of an exhaust gas recirculation device according to the invention 1, in the for better illustration, the front housing was omitted.
  • a part of an exhaust manifold 2 is shown, the opens into a housing 3.
  • This exhaust manifold 2 is via a rotary valve 4 connected to exhaust gas control channels 5, which in turn to known Way open in not shown air intake ducts of the internal combustion engine.
  • the housing 3, a drive module 6 for the rotary valve 4 is arranged.
  • FIG 2 shows the exhaust gas recirculation device of Figure 1 in section.
  • the drive module 6, which is designed in a known manner as an electric drive module, drives a shaft 7, which via a coupling member 8 with a rotation axis 9 of a Switching element 10 is connected.
  • the disk-shaped, in cross-section circular switching element 10 driven by a driver 11, wherein the switching element 10 is gimbaled to the driver 11 is.
  • the switching element 10 has passages 12 for exhaust gas recirculation on, (see Figure 1) which correspond to openings 13 of a control surface 14.
  • the Openings 13 are, as Figure 2 clearly shows, the exhaust gas control channels 5 assigned.
  • the control surface 14 is in the present embodiment of a made ceramic material and has scraping edges 15, the one possible allow frictionless adjustment of the switching element 10 and deposits should prevent.
  • the further is the Switching element 10 by a spring 16, which is supported on the axis of rotation 9, opposite biased the control surface 14, whereby in the closed state the rotary valve 4, the tightness is ensured.
  • the openings 13 of the control surface 14 may have a defined geometric shape such as e.g. circular elliptical, angular, etc., such that in this way a specific flow characteristic for the exhaust gas recirculation flow is definable.
  • FIG 3 shows an alternative embodiment of the switching element 10, which in this case is cross-shaped, wherein the intermediate spaces 17 with the Openings 13 of the control surface correspond.

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)
  • Exhaust Gas After Treatment (AREA)

Description

Die Erfindung betrifft eine Abgasrückführeinrichtung für eine Brennkraftmaschine mit einer von einem Auslaßsystem der Brennkraftmaschine kommenden Abgassammelleitung, die über ein Drehschieberventil fluidisch mit Lufteinlaßkanälen der Brennkraftmaschine in Verbindung steht, wobei das Drehschieberventil ein Gehäuse aufweist mit einem auf einer Drehachse befestigten scheibenförmigen Schaltelement, das mit einer Steuerfläche korrespondiert, die Öffnungen aufweist, denen Abgassteuerkanäle zugeordnet sind.The invention relates to an exhaust gas recirculation device for an internal combustion engine with an exhaust manifold coming from an exhaust system of the internal combustion engine, the fluidically via a rotary valve with air intake ducts of the Internal combustion engine is in communication, wherein the rotary valve a housing has a disk-shaped attached to a rotation axis Switching element corresponding to a control surface having openings, which exhaust control channels are assigned.

Eine derartige Abgasrückführeinrichtung ist beispielsweise aus der DE - A1 - 199 41 035 bekannt. Diese Druckschrift beschreibt eine Abgasrückführeinrichtung, die unmittelbar mit den Lufteinlaßkanälen der Brennkraftmaschine zusammenwirkt. Ein Schaltelement eines Abgasrückführventiles ist dabei durch eine entlang der Lufteinlaßkanäle verlaufende Antriebswelle verstellbar. Diese Ausführungsform nimmt relativ viel Bauraum in Anspruch und ist darüber hinaus störanfällig gegenüber äußeren Einflüssen.Such an exhaust gas recirculation device is known, for example, from DE-A1-199 41 035 known. This document describes an exhaust gas recirculation device, the interacts directly with the air inlet ducts of the internal combustion engine. A switching element of an exhaust gas recirculation valve is characterized by a along the Air intake ducts extending drive shaft adjustable. This embodiment takes up a relatively large amount of space and is also susceptible to faults external influences.

In der FR 27 24 976 wird eine Abgasrückführeinrichtung offenbart, bei der eine Abgassammelleitung über ein Drehschieberventil fluidisch mit einem Lufteinlasskanal verbindbar ist. Das Drehschieberventil weist ein Gehäuse auf, an dem ein Antriebsmodul zur Betätigung des Drehschieberventils angebracht ist. Ein scheibenförmiges Schaltelement korrespondiert dabei mit einer Steuerfläche, welche eine Öffnung aufweist, über die die fluidische Verbindung durch Drehen des Schaltelementes hergestellt werden kann. Aufgabe der Erfindung ist es, diese Nachteile zu vermeiden und eine Abgasrückführeinrichtung zu schaffen, die kompakter im Aufbau und störunanfällig gegenüber äußeren Einflüssen ist.In FR 27 24 976 an exhaust gas recirculation device is disclosed in which a Exhaust manifold via a rotary valve fluidly with an air inlet duct is connectable. The rotary valve has a housing, on which a Drive module is mounted for actuating the rotary valve. A disc-shaped Switching element corresponds to a control surface, which has an opening through which the fluidic connection by turning the Switching element can be produced. The object of the invention is to avoid these disadvantages and an exhaust gas recirculation device to create, the more compact in construction and susceptible to interference external influences.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß am Gehäuse ein Antriebsmodul für das Drehschieberventil vorgesehen ist, wobei die Steuerfläche des Drehschieberventils Schabekanten aufweist, die mit dem Schaltelement in Kontakt stehen. Auf diese Art und Weise wird eine sehr kompakte Bauform der Abgasrückführeinrichtung geschaffen. Die kompakte Ausführungsform vermindert des weiteren die Störanfälligkeit, da nun Antriebsmodul und Abgasrückführventil nicht mehr getrennt im Motorraum angeordnet sind und die Reibungskräfte zwischen Schaltelement und Steuerfläche so gering wie möglich gehalten werden.This object is achieved in that the housing a drive module is provided for the rotary valve, wherein the control surface of the Rotary slide valve has scraping edges, which are in contact with the switching element stand. In this way, a very compact design of the exhaust gas recirculation device created. The compact embodiment reduces the further susceptibility, since now drive module and exhaust gas recirculation valve not are arranged more separately in the engine compartment and the friction forces between Switching element and control surface are kept as low as possible.

Das Antriebsmodul ist dabei über ein Kupplungsorgan mit der Drehachse des Schaltelementes verbunden.The drive module is via a coupling member with the axis of rotation of Switching element connected.

Als vorteilhaft hat es sich erwiesen, daß die Öffnungen der Steuerfläche eine definierte geometrische Form aufweisen, wie z.B. kreisrund, elliptisch, eckig, etc. derart, daß eine bestimmt Durchflußcharakteristik definierbar ist.It has proven to be advantageous for the openings of the control surface to be defined have geometric shape, such. circular, elliptical, angular, etc. such, that a certain flow characteristic can be defined.

Als Werkstoff für die Steuerflächen hat sich Keramik als vorteilhaft erwiesen.As a material for the control surfaces, ceramics has proven to be advantageous.

Das im Beispiel dargestellte scheibenförmige Schaltelement ist dabei für eine Vier-Zylinder-Brennkraftmaschine im Querschnitt kreisrund mit entsprechenden Durchtrittsöffnungen oder kreuzförmig ausgebildet.The disc-shaped switching element shown in the example is for a Four-cylinder internal combustion engine in cross-section circular with corresponding Passage openings or cross-shaped.

Dadurch, daß das Schaltelement mittels einer Feder gegen die Steuerfläche vorgespannt ist, ist die Dichtfunktion des Abgasrückführventils gewährleistet, wobei es besonders vorteilhaft ist, wenn das Schaltelement durch einen kardanisch verbundenen Mitnehmer antreibbar ist.Characterized in that the switching element biased by a spring against the control surface is, the sealing function of the exhaust gas recirculation valve is ensured, wherein it is particularly advantageous if the switching element connected by a gimbal Driver is drivable.

Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und werden nachfolgend beschrieben. Embodiments of the invention are shown in the drawing and will be described below.

Die Zeichnung zeigt:

Figur 1
eine perspektivische Ansicht einer teilweise geöffneten Abgasrückführeinrichtung,
Figur 2
eine Schnittansicht der Abgasrückführeinrichtung aus Figur 1 und
Figur 3
eine alternative Ausführungsform eines scheibenförmigen Schaltelementes.
The drawing shows:
FIG. 1
a perspective view of a partially opened exhaust gas recirculation device,
FIG. 2
a sectional view of the exhaust gas recirculation device of Figure 1 and
FIG. 3
an alternative embodiment of a disc-shaped switching element.

Figur 1 zeigt in perspektivischer Ansicht eine erfindungsgemäße Abgasrückführeinrichtung 1, bei der zur besseren Darstellung die vordere Gehäusewandung weggelassen wurde. Dabei ist ein Teil einer Abgassammelleitung 2 dargestellt, die in ein Gehäuse 3 mündet. Diese Abgassammelleitung 2 ist über ein Drehschieberventil 4 mit Abgassteuerkanälen 5 verbunden, die wiederum auf bekannte Weise in nicht dargestellte Lufteinlaßkanäle der Brennkraftmaschine münden. Erfindungsgemäß ist nun vorgesehen, daß am Gehäuse 3 ein Antriebsmodul 6 für das Drehschieberventil 4 angeordnet ist.Figure 1 shows a perspective view of an exhaust gas recirculation device according to the invention 1, in the for better illustration, the front housing was omitted. In this case, a part of an exhaust manifold 2 is shown, the opens into a housing 3. This exhaust manifold 2 is via a rotary valve 4 connected to exhaust gas control channels 5, which in turn to known Way open in not shown air intake ducts of the internal combustion engine. According to the invention is now provided that the housing 3, a drive module 6 for the rotary valve 4 is arranged.

Figur 2 zeigt die Abgasrückführeinrichtung aus Figur 1 im Schnitt. Das Antriebsmodul 6, das auf bekannte Weise als elektrisches Antriebsmodul ausgeführt ist, treibt eine Welle 7 an, die über ein Kupplungsorgan 8 mit einer Drehachse 9 eines Schaltelementes 10 verbunden ist. Im vorliegenden Fall wird das scheibenförmige, im Querschnitt kreisrunde Schaltelement 10 durch einen Mitnehmer 11 angetrieben, wobei das Schaltelement 10 kardanisch an den Mitnehmer 11 aufgehängt ist. Das Schaltelement 10 weist zur Abgasrückführung Durchtrittsöffnungen 12 auf, (s. Figur 1) die mit Öffnungen 13 einer Steuerfläche 14 korrespondieren. Die Öffnungen 13 sind, wie Figur 2 deutlich zeigt, den Abgassteuerkanälen 5 zugeordnet. Die Steuerfläche 14 ist im vorliegenden Ausführungsbeispiel aus einem keramischen Werkstoff hergestellt und weist Schabekanten 15 auf, die ein möglichst reibungsfreies Verstellen des Schaltelementes 10 ermöglichen und Ablagerungen verhindern soll. Im vorliegenden Ausführungsbeispiel ist des weiteren das Schaltelement 10 durch eine Feder 16, die sich an der Drehachse 9 abstützt, gegenüber der Steuerfläche 14 vorgespannt, wodurch im geschlossenen Zustand des Drehschieberventils 4 die Dichtheit gewährleistet ist. Figure 2 shows the exhaust gas recirculation device of Figure 1 in section. The drive module 6, which is designed in a known manner as an electric drive module, drives a shaft 7, which via a coupling member 8 with a rotation axis 9 of a Switching element 10 is connected. In the present case, the disk-shaped, in cross-section circular switching element 10 driven by a driver 11, wherein the switching element 10 is gimbaled to the driver 11 is. The switching element 10 has passages 12 for exhaust gas recirculation on, (see Figure 1) which correspond to openings 13 of a control surface 14. The Openings 13 are, as Figure 2 clearly shows, the exhaust gas control channels 5 assigned. The control surface 14 is in the present embodiment of a made ceramic material and has scraping edges 15, the one possible allow frictionless adjustment of the switching element 10 and deposits should prevent. In the present embodiment, the further is the Switching element 10 by a spring 16, which is supported on the axis of rotation 9, opposite biased the control surface 14, whereby in the closed state the rotary valve 4, the tightness is ensured.

Die Öffnungen 13 der Steuerfläche 14 können eine definierte geometrische Form aufweisen, wie z.B. kreisrund elliptisch, eckig, etc., derart, daß auf diese Weise eine bestimmte Durchflußcharakteristik für den Abgasrückführstrom definierbar ist.The openings 13 of the control surface 14 may have a defined geometric shape such as e.g. circular elliptical, angular, etc., such that in this way a specific flow characteristic for the exhaust gas recirculation flow is definable.

Figur 3 zeigt eine alternative Ausführungsform des Schaltelementes 10, das in diesem Falle kreuzförmig ausgebildet ist, wobei die Zwischenräume 17 mit den Öffnungen 13 der Steuerfläche korrespondieren.Figure 3 shows an alternative embodiment of the switching element 10, which in this case is cross-shaped, wherein the intermediate spaces 17 with the Openings 13 of the control surface correspond.

Es sollte deutlich sein, daß gerade für das Schaltelement 10 die verschiedenartigsten Ausführungsformen denkbar sind.It should be clear that just for the switching element 10, the most diverse Embodiments are conceivable.

Claims (7)

  1. Exhaust gas recirculation device for an internal combustion engine, with an exhaust manifold pipe (2) which comes from an outlet system of the internal combustion engine, and which is connected fluidically via a rotary valve (4) to air inlet ducts of the internal combustion engine, the rotary valve having a housing (3) with a disc-shaped switching element (10) which is fixed on a rotational axis (9) and corresponds to a control surface (14), which has openings (13) to which exhaust gas control ducts (5) are assigned, a drive module (6) for the rotary valve (4) being provided on the housing (3), characterized in that the control surface (14) has notched edges (15), which are in contact with the switching element (10).
  2. Exhaust gas recirculation device according to Claim 1, characterized in that the drive module (6) is connected via a coupling element (8) to the rotational axis (9) of the switching element (10).
  3. Exhaust gas recirculation device according to Claim 1 or 2, characterized in that the openings (13) of the control surface (14) have a defined geometrical shape, e.g. circular, elliptical, angular, etc., so that a specified flow characteristic can be defined.
  4. Exhaust gas recirculation device according to one of the preceding claims, characterized in that the control surface (14) is made of a ceramic material.
  5. Exhaust gas recirculation device according to one of the preceding claims, characterized in that for a 4-cylinder internal combustion engine the disc-shaped switching element (10) is circular in cross-section with corresponding pass-through openings (12), or is cross-shaped.
  6. Exhaust gas recirculation device according to one of the preceding claims, characterized in that the switching element (10) is prestressed against the control surface (13) by a spring (16).
  7. Exhaust gas recirculation device according to one of the preceding claims, characterized in that the switching element (10) can be driven by a dog (11) which is connected to it by a universal joint.
EP01124739A 2001-01-13 2001-10-17 Exhaust recirculation device for an internal combustion engine Expired - Lifetime EP1223331B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10101412.0A DE10101412B4 (en) 2001-01-13 2001-01-13 Exhaust gas recirculation device for an internal combustion engine
DE10101412 2001-01-13

Publications (3)

Publication Number Publication Date
EP1223331A2 EP1223331A2 (en) 2002-07-17
EP1223331A3 EP1223331A3 (en) 2004-01-02
EP1223331B1 true EP1223331B1 (en) 2005-03-16

Family

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Application Number Title Priority Date Filing Date
EP01124739A Expired - Lifetime EP1223331B1 (en) 2001-01-13 2001-10-17 Exhaust recirculation device for an internal combustion engine

Country Status (4)

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US (1) US6651634B2 (en)
EP (1) EP1223331B1 (en)
DE (2) DE10101412B4 (en)
ES (1) ES2236110T3 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10207922A1 (en) * 2002-02-23 2003-09-04 Daimler Chrysler Ag Control valve, in particular for an internal combustion engine, for the controlled return of exhaust gas
DE102004040221B4 (en) 2004-08-19 2009-01-08 Pierburg Gmbh Adjustable two-way valve device for an internal combustion engine
DE602006018581D1 (en) * 2005-02-07 2011-01-13 Borgwarner Inc EGR ADJUSTMENT MODULE FOR A DIESEL ENGINE
DE102005044089A1 (en) * 2005-09-08 2007-03-15 Behr Gmbh & Co. Kg Device for controlling an exhaust gas flow
EP2143931A3 (en) * 2008-07-10 2012-09-05 Hirschmann Automotive GmbH AGR valve system
DE102008046594A1 (en) * 2008-07-18 2010-01-21 Mahle International Gmbh valve means
FR3032253B1 (en) * 2015-02-04 2017-01-20 Mmt Sa ELECTRO-CONTROLLED VALVE FOR HOT FLUID
DE102015004035A1 (en) 2015-03-27 2016-09-29 Daimler Ag Rotary slide valve for an exhaust gas recirculation device

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2303007A1 (en) * 1973-01-22 1974-07-25 Volkswagenwerk Ag VALVE FOR THE CONTROL OF THE RETURNED EXHAUST GAS QUANTITY IN A DEVICE FOR EXHAUST GAS RECIRCULATION
IT218048Z2 (en) * 1988-12-02 1992-03-30 Galatron Srl COUPLE OF COOPERATING PLATES FOR THE CONTROL OF THE DISPENSING OF THE FLUID IN SO-CALLED "VITONE" VALVES
DE4111259C1 (en) * 1991-04-08 1992-04-23 Fa. Carl Freudenberg, 6940 Weinheim, De
DE4204434C2 (en) * 1992-02-14 2000-06-21 Pierburg Ag Control valve for exhaust gas recirculation
FR2724976B1 (en) * 1994-09-27 1996-12-20 Sagem Allumage RECYCLED EXHAUST GAS QUANTITY UNIT IN AN EXHAUST GAS RECIRCULATION SYSTEM OF AN INTERNAL COMBUSTION ENGINE
US5811898A (en) * 1995-12-21 1998-09-22 Siemens Electric Limited Rotary actuator
GB2329001B (en) * 1997-09-04 2001-09-05 Gen Motors Corp Exhaust gas recirculation valve
DE19809124A1 (en) * 1998-03-04 1999-09-16 Daimler Chrysler Ag Control device for the cooling and heating circuit of an internal combustion engine
AT3136U1 (en) 1998-09-10 1999-10-25 Avl List Gmbh INLET SYSTEM WITH AN INLET PIPE BRANCH FOR AN INTERNAL COMBUSTION ENGINE WITH SEVERAL CYLINDERS
DE19904622B4 (en) * 1999-02-05 2012-01-05 Audi Ag Control valve for the return of exhaust gas to the fresh gas of an internal combustion engine

Also Published As

Publication number Publication date
ES2236110T3 (en) 2005-07-16
US20020092510A1 (en) 2002-07-18
DE10101412B4 (en) 2014-05-28
DE50105613D1 (en) 2005-04-21
DE10101412A1 (en) 2002-07-18
EP1223331A3 (en) 2004-01-02
US6651634B2 (en) 2003-11-25
EP1223331A2 (en) 2002-07-17

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