EP2133549A2 - Valve system - Google Patents

Valve system Download PDF

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Publication number
EP2133549A2
EP2133549A2 EP09158138A EP09158138A EP2133549A2 EP 2133549 A2 EP2133549 A2 EP 2133549A2 EP 09158138 A EP09158138 A EP 09158138A EP 09158138 A EP09158138 A EP 09158138A EP 2133549 A2 EP2133549 A2 EP 2133549A2
Authority
EP
European Patent Office
Prior art keywords
valve
housing
coupling element
valve system
coupling
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
EP09158138A
Other languages
German (de)
French (fr)
Other versions
EP2133549B1 (en
EP2133549A3 (en
Inventor
Stefan Vitt
Hans-Georg Joepen
Osman Sari
Wolfgang Kohnen
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
Application filed by Pierburg GmbH filed Critical Pierburg GmbH
Publication of EP2133549A2 publication Critical patent/EP2133549A2/en
Publication of EP2133549A3 publication Critical patent/EP2133549A3/en
Application granted granted Critical
Publication of EP2133549B1 publication Critical patent/EP2133549B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F02M26/52—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

Definitions

  • the invention relates to a valve system for internal combustion engines, in particular for exhaust gas recirculation with at least one housing by a drive unit with a drive shaft and connected to this drive shaft eccentric, which is in operative connection with a coupling unit, and at least two valves are arranged, wherein the valves each at least a valve rod, a valve closing body and a valve seat, such that the rotational movement of the drive unit is convertible into a linear synchronous movement of the valve stem.
  • a valve system is for example from the DE 102 21 711 A1 known.
  • Such a valve system is suitable for the synchronous movement of the valve rods.
  • a relatively complicated constructed coupling unit is necessary. This consists of several components and thus requires a costly installation of the valve system.
  • the present invention seeks to provide a valve system that the o. G. Disadvantages avoids and also simple to build is inexpensive to manufacture.
  • the coupling unit consists of a bearing element by the eccentric is mounted, and a coupling element, wherein the valve rods are mounted in the coupling element and forcibly guided in the housing and wherein in the region of the bearing element, a guide rod is provided, which is also in Housing is forced.
  • Such a designed valve system thus requires for synchronous actuation of the valve rod only a coupling unit, which consists essentially of the components Eccentric, bearing element and coupling element consists.
  • the valve rods are axially fixed by retaining washers in the coupling element. It is also possible to carry out the coupling element and the guide rod in one piece.
  • the illustrated valve system consists of a drive unit 1, which consists of an electric motor 2 with a arranged in a motor housing in a known manner planetary gear 3 and an exiting from the motor housing 4 drive shaft 5. At the end of exiting the motor housing 4 drive shaft 5, an eccentric 6 is fixedly mounted.
  • FIG. 2 shows the valve system according to the invention in a sectional view.
  • the eccentric 6 off FIG. 1 is arranged via a pin 7 by means of a bearing element 8 in a coupling element 9.
  • the coupling unit thus consists of the eccentric 6 with the associated pin 7, the bearing element 8 and the coupling element.
  • valve rods 10 and 11 are axially fixed in the present embodiment.
  • two retaining disks 12, 13 engage positively below and below the coupling element in the valve rods 10, 11.
  • the lower retaining plate 12 also serves as a contact surface for a spring plate 19, which in turn carries a spring 14 which holds the valve rods 10, 11 in the open position of the valves connected to the valve rods valve plates 15, 16 under tension in the direction of the coupling element 9, thus at a failure of the electric motor 2, the valve plate 15, 16 are always brought into a closed position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lift Valve (AREA)
  • Exhaust-Gas Circulating Devices (AREA)

Abstract

The valve system has housing (18), in which a drive unit is provided with a drive shaft and a tappet connected with the drive shaft. A coupling unit has a bearing element (8), in which the tappet is mounted, and a coupler element (9). The valve rods (10,11) are mounted in the coupler element and guided in the housing. A guide rod (17) is provided in the bearing element.

Description

Die Erfindung betrifft ein Ventilsystem für Verbrennungskraftmaschinen insbesondere zur Abgasrückführung mit mindestens einem Gehäuse, indem eine Antriebseinheit mit einer Antriebswelle und einem mit dieser Antriebswelle verbundenen Exzenter, der in Wirkverbindung mit einer Kupplungseinheit steht, und mindestens zwei Ventile angeordnet sind, wobei die Ventile jeweils zumindest aus einer Ventilstange, einem Ventilschließkörper und einem Ventilsitz bestehen, derart, dass die rotatorische Bewegung der Antriebseinheit in eine lineare synchrone Bewegung der Ventilstange umwandelbar ist. Ein derartiges Ventilsystem ist beispielsweise aus der DE 102 21 711 A1 bekannt. Ein derartiges Ventilsystem ist für die synchrone Bewegung der Ventilstangen geeignet. Um eine derartige synchrone Bewegung jedoch zu gewährleisten, ist eine relativ kompliziert aufgebaute Kupplungseinheit notwendig. Diese besteht aus mehreren Bauelementen und bedingt damit eine kostenintensive Montage des Ventilsystems.The invention relates to a valve system for internal combustion engines, in particular for exhaust gas recirculation with at least one housing by a drive unit with a drive shaft and connected to this drive shaft eccentric, which is in operative connection with a coupling unit, and at least two valves are arranged, wherein the valves each at least a valve rod, a valve closing body and a valve seat, such that the rotational movement of the drive unit is convertible into a linear synchronous movement of the valve stem. Such a valve system is for example from the DE 102 21 711 A1 known. Such a valve system is suitable for the synchronous movement of the valve rods. However, to ensure such a synchronous movement, a relatively complicated constructed coupling unit is necessary. This consists of several components and thus requires a costly installation of the valve system.

Hiervon ausgehend liegt der Erfindung die Aufgabe zugrunde, ein Ventilsystem zu schaffen, dass die o. g. Nachteile vermeidet und zudem einfach aufgebaut kostengünstig herzustellen ist.On this basis, the present invention seeks to provide a valve system that the o. G. Disadvantages avoids and also simple to build is inexpensive to manufacture.

Diese Aufgabe wird dadurch gelöst, dass die Kupplungseinheit aus einem Lagerelement, indem der Exzenter gelagert ist, und einem Koppelelement besteht, wobei die Ventilstangen in dem Koppelelement gelagert und im Gehäuse zwangsgeführt sind und wobei im Bereich des Lagerelementes eine Führungsstange vorgesehen ist, die ebenfalls im Gehäuse zwangsgeführt ist.This object is achieved in that the coupling unit consists of a bearing element by the eccentric is mounted, and a coupling element, wherein the valve rods are mounted in the coupling element and forcibly guided in the housing and wherein in the region of the bearing element, a guide rod is provided, which is also in Housing is forced.

Ein derartig gestaltetes Ventilsystem benötigt also zur synchronen Betätigung der Ventilstange lediglich eine Kupplungseinheit, die im Wesentlichen aus den Bauteilen Exzenter, Lagerelement und Koppelelement besteht. Auf besonders einfache Art und Weise sind die Ventilstangen durch Haltescheiben im Koppelelement axial fest angeordnet. Auch ist es möglich, das Koppelelement und die Führungsstange einteilig auszuführen.Such a designed valve system thus requires for synchronous actuation of the valve rod only a coupling unit, which consists essentially of the components Eccentric, bearing element and coupling element consists. In a particularly simple manner, the valve rods are axially fixed by retaining washers in the coupling element. It is also possible to carry out the coupling element and the guide rod in one piece.

Ein Ausführungsbeispiel eines derartigen Ventilsystems ist in der Zeichnung dargestellt und wird nachfolgend beschrieben, hierin zeigen:

  • Figur 1 eine Unteransicht des erfindungsgemäßen Ventilsystems, und
  • Figur 2 eine Schnittansicht des erfindungsgemäßen Ventilsystems.
An embodiment of such a valve system is shown in the drawing and is described below, in which:
  • FIG. 1 a bottom view of the valve system according to the invention, and
  • FIG. 2 a sectional view of the valve system according to the invention.

Gemäß Figur 1 besteht das dargestellte Ventilsystem aus einer Antriebseinheit 1, welche einen Elektromotor 2 mit einem in einem Motorgehäuse auf bekannte Weise angeordneten Planetenstandgetriebe 3 und einer aus dem Motorgehäuse 4 austretenden Antriebswelle 5 besteht. Am Ende der aus dem Motorgehäuse 4 austretenden Antriebswelle 5 ist ein Exzenter 6 fest angebracht.According to FIG. 1 the illustrated valve system consists of a drive unit 1, which consists of an electric motor 2 with a arranged in a motor housing in a known manner planetary gear 3 and an exiting from the motor housing 4 drive shaft 5. At the end of exiting the motor housing 4 drive shaft 5, an eccentric 6 is fixedly mounted.

Figur 2 zeigt das erfindungsgemäße Ventilsystem in einer Schnittansicht. Der Exzenter 6 aus Figur 1 ist dabei über einen Stift 7 mittels eines Lagerelementes 8 in einem Koppelelement 9 angeordnet ist. Die Kupplungseinheit besteht also aus dem Exzenter 6 mit dem dazugehörigen Stift 7, dem Lagerelement 8 sowie dem Koppelelement 9. FIG. 2 shows the valve system according to the invention in a sectional view. The eccentric 6 off FIG. 1 is arranged via a pin 7 by means of a bearing element 8 in a coupling element 9. The coupling unit thus consists of the eccentric 6 with the associated pin 7, the bearing element 8 and the coupling element. 9

In dem Koppelelement sind im vorliegenden Ausführungsbeispiel zwei Ventilstangen 10 und 11 axial fest angeordnet. Hierzu greifen jeweils zwei Haltescheiben 12, 13 unterhalb und oberhalb des Koppelelementes formschlüssig in die Ventilstangen 10, 11 ein. Die untere Haltescheibe 12 dient dabei außerdem als Anlagefläche für einen Federteller 19, der wiederum eine Feder 14 führt, welche die Ventilstangen 10, 11 in Richtung des Koppelelementes 9 in der Offenstellung der mit den Ventilstangen verbundenen Ventiltellern 15, 16 unter Vorspannung hält, damit bei einem Ausfall des Elektromotors 2 die Ventilteller 15, 16 immer in eine geschlossene Stellung gebracht werden.In the coupling element, two valve rods 10 and 11 are axially fixed in the present embodiment. For this purpose, in each case two retaining disks 12, 13 engage positively below and below the coupling element in the valve rods 10, 11. The lower retaining plate 12 also serves as a contact surface for a spring plate 19, which in turn carries a spring 14 which holds the valve rods 10, 11 in the open position of the valves connected to the valve rods valve plates 15, 16 under tension in the direction of the coupling element 9, thus at a failure of the electric motor 2, the valve plate 15, 16 are always brought into a closed position.

Um nun eine axiale Bewegung der Ventilstangen und damit ein sicheres Öffnen und Schließen der Ventilteller 15, 16 zu gewährleisten, weist das Koppelelement 9 im Bereich des Lagerelementes 8 eine Führungsstange 17 auf, die in einem Gehäuse 18 zwangsgeführt ist. Auf diese Weise wird eine einwandfreie Öffnungs- und Schließbewegung der Ventilstangen gewährleistet. Zusätzlich können auch noch die Ventilstangen 10 und 11 im Gehäuse 18 zwangsgeführt sein. Darüber hinaus ist auch denkbar, im Gehäuse 18 noch eine Wasserkühlung vorzusehen.In order to ensure an axial movement of the valve rods and thus a safe opening and closing of the valve plates 15, 16, the coupling element 9 in the region of the bearing element 8, a guide rod 17 which is positively guided in a housing 18. In this way, a perfect opening and closing movement of the valve rods is ensured. In addition, even the valve rods 10 and 11 may be forcibly guided in the housing 18. In addition, it is also conceivable to provide water cooling in the housing 18.

Claims (3)

Ventilsystem für Verbrennungskraftmaschinen insbesondere zur Abgasrückführung mit mindestens einem Gehäuse, in dem eine Antriebseinheit mit einer Antriebswelle und einem mit dieser Antriebswelle verbundenen Exzenter, der in Wirkverbindung mit einer Kupplungseinheit steht, und mindestens zwei Ventile angeordnet sind, wobei die Ventile jeweils zumindest aus einer Ventilstange, einem Ventilschließkörper und einem Ventilsitz bestehen, derart, dass die rotatorische Bewegung der Antriebseinheit in eine lineare synchrone Bewegung der Ventilstangen umwandelbar ist,
dadurch gekennzeichnet, dass
die Kupplungseinheit aus einem Lagerelement (8), in dem der Exzenter (6) gelagert ist, und einem Koppelelement (9) besteht, wobei die Ventilstangen (10, 11) in dem Koppelelement (9) gelagert und im Gehäuse (18) zwangsgeführt sind und wobei im Bereich des Lagerelementes (8) eine Führungsstange (17) vorgesehen ist, die ebenfalls im Gehäuse (18) zwangsgeführt ist.Valve system for internal combustion engines, in particular for exhaust gas recirculation, with at least one housing, in which a drive unit is arranged with a drive shaft and an eccentric connected to this drive shaft, which is in operative connection with a coupling unit, and at least two valves, wherein the valves each comprise at least one valve stem, a valve closing body and a valve seat, such that the rotational movement of the drive unit is convertible into a linear synchronous movement of the valve rods,
characterized in that
the coupling unit of a bearing element (8) in which the eccentric (6) is mounted, and a coupling element (9), wherein the valve rods (10, 11) mounted in the coupling element (9) and forcibly guided in the housing (18) and wherein in the region of the bearing element (8) a guide rod (17) is provided, which is also forcibly guided in the housing (18). Ventilsystem nach Anspruch 1, dadurch gekennzeichnet, dass die Ventilstangen (10, 11) durch Haltescheiben (12, 13) im Koppelelement (9) axial fest angeordnet sind.Valve system according to claim 1, characterized in that the valve rods (10, 11) are axially fixed by retaining washers (12, 13) in the coupling element (9). Ventilsystem nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Koppelelement (9) und die Führungsstange (17) einteilig ausgeführt sind.Valve system according to claim 1 or 2, characterized in that the coupling element (9) and the guide rod (17) are made in one piece.
EP09158138A 2008-06-10 2009-04-17 Valve system Active EP2133549B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008027490A DE102008027490A1 (en) 2008-06-10 2008-06-10 valve system

Publications (3)

Publication Number Publication Date
EP2133549A2 true EP2133549A2 (en) 2009-12-16
EP2133549A3 EP2133549A3 (en) 2011-06-29
EP2133549B1 EP2133549B1 (en) 2012-11-14

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ID=41055373

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09158138A Active EP2133549B1 (en) 2008-06-10 2009-04-17 Valve system

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EP (1) EP2133549B1 (en)
DE (1) DE102008027490A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013101938B4 (en) 2013-02-27 2020-02-13 Pierburg Gmbh Drive arrangement for a unit of an internal combustion engine and exhaust gas recirculation valve
DE102013112018B4 (en) 2013-10-31 2018-12-20 Pierburg Gmbh Valve system for internal combustion engines

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10221711A1 (en) 2002-05-16 2003-11-27 Pierburg Gmbh valve system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19847288B4 (en) * 1998-10-14 2014-12-11 Pierburg Gmbh Exhaust gas recirculation valve for an internal combustion engine
DE10336976B4 (en) * 2003-08-12 2005-08-18 Pierburg Gmbh Valve device for an internal combustion engine
DE102005044089A1 (en) * 2005-09-08 2007-03-15 Behr Gmbh & Co. Kg Device for controlling an exhaust gas flow
EP1793114B1 (en) * 2005-12-02 2013-05-15 Behr Thermot-tronik GmbH Apparatus, in particular exhaust gas recirculation valve device, for controlling a fluid flow

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10221711A1 (en) 2002-05-16 2003-11-27 Pierburg Gmbh valve system

Also Published As

Publication number Publication date
EP2133549B1 (en) 2012-11-14
DE102008027490A1 (en) 2009-12-31
EP2133549A3 (en) 2011-06-29

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