EP2926039A1 - Valve - Google Patents

Valve

Info

Publication number
EP2926039A1
EP2926039A1 EP13795755.1A EP13795755A EP2926039A1 EP 2926039 A1 EP2926039 A1 EP 2926039A1 EP 13795755 A EP13795755 A EP 13795755A EP 2926039 A1 EP2926039 A1 EP 2926039A1
Authority
EP
European Patent Office
Prior art keywords
flap
channel
flaps
connecting element
valve according
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Withdrawn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
EP13795755.1A
Other languages
German (de)
French (fr)
Inventor
Carsten MIKOLAJEK
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.)
Continental Automotive GmbH
Original Assignee
Continental Automotive 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 Continental Automotive GmbH filed Critical Continental Automotive GmbH
Publication of EP2926039A1 publication Critical patent/EP2926039A1/en
Withdrawn legal-status Critical Current

Links

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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10209—Fluid connections to the air intake system; their arrangement of pipes, valves or the like
    • F02M35/10222—Exhaust gas recirculation [EGR]; Positive crankcase ventilation [PCV]; Additional air admission, lubricant or fuel vapour admission
    • 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
    • F02M26/14—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system
    • F02M26/16—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system with EGR valves located at or near the connection to the exhaust system
    • 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
    • F02M26/17—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system
    • F02M26/19—Means for improving the mixing of air and recirculated exhaust gases, e.g. venturis or multiple openings to the intake system
    • 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
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/04—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only lift valves
    • F16K11/052—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only lift valves with pivoted closure members, e.g. butterfly valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the invention relates to a valve for controlling two gas flows with a housing, two arranged in the housing channels for guiding each of a gas, arranged in the first channel first flap for opening and closing the first channel, wherein the first flap rotatable on a shaft is arranged, an electric motor for actuating the shaft, a second flap for opening and closing the second channel and a third channel, in which the first and second channel opens.
  • Such housings are used as mixing valves in motor vehicles, in particular as exhaust gas recirculation valves and are generally known.
  • Such valves have a channel for the intake fresh air and a second channel for the exhaust gas.
  • a flap is arranged, which opens or closes the respective channel cross-section by pivoting.
  • Gear transmission is very high. In addition to the many additional transmission components and the housing side effort with the many bearings not insignificant. In addition, such a transmission requires additional space.
  • the invention is therefore an object of the invention to provide a valve of the type mentioned, which is simpler. In particular, the number of required components should be reduced.
  • the object is achieved in that a connecting element is arranged on the first flap, and that the connecting ⁇ element is connected to the second flap.
  • the second flap is positioned with respect to the first flap and to the housing. Furthermore, the pivoting angle of the second flap is determined with the connecting element as a function of the pivoting angle of the first flap in accordance with a predetermined movement regime. While previous coupling mechanisms transmitted from the shaft of a flap, the movement according to the predetermined movement regime on the shaft of the other flap, with this valve the
  • the valve according to the invention is characterized by the omission of a coupling mechanism, the second shaft and their storage by particularly few components. This makes this valve very compact and requires little space. Due to the few components, the assembly is very simple and the valve has a low weight.
  • both flaps and the connecting element have a relatively simple structure.
  • the connecting element with at least one flap, integrally formed. The connec ⁇ tion element is made together with the at least one flap, so that no additional assembly of flap and connecting element is required.
  • both flaps and the connecting element are a component. Even with different flap design, such a component can be produced relatively simply, for example, by die casting or by injection molding. Thus eliminates the assembly between the flaps and the connecting part.
  • the two flaps are made of the same material. This has the advantage that, if necessary, a design for both flaps can be used.
  • both flaps made of different materials. These can be different metals, metal alloys and plastics. But it is also possible to produce a flap of a metal or a metal alloy and the other flap of a plastic. Due to the thermal load, it is advantageous to produce the flap in the exhaust duct made of metal, while the flap in the intake duct may be made of plastic.
  • the connecting element consists of the same material as at least one of the two flaps. This makes it possible to manufacture the connecting element together with a flap as a component.
  • connecting element and flap are made of plastic, they can be produced very easily and with many design options by injection molding.
  • Fig. 1 shows the housing of an exhaust gas recirculation valve
  • Fig. 2 is a diagram with the opening characteristics
  • FIG. 1 A first figure.
  • the exhaust gas recirculation valve in FIG. 1 consists of a housing 1 which has a first channel 2 and a second channel 3 and a third channel 4.
  • the first channel 2 is the exhaust passage, through which the exhaust gas of the intake air can be supplied.
  • the second channel 3 is the intake passage through which the sucked air is passed.
  • the third channel 4 is the mixing channel, through which the two gas streams are forwarded.
  • the exhaust passage 2 has a round cross section, while the intake passage 3 and the mixing passage 4 have a rectangular cross section. It is also possible that, depending on the geometry of the lines to be connected to the inlet 5 of the intake duct 3 and the outlet 6 of the mixing channel 4 also has a round cross-section have ⁇ .
  • both channels 3, 4 would be limited in this case to the central part of the housing 1.
  • a multi-part housing, in particular for the exhaust gas and intake duct can be used.
  • a first flap 7 is rotatably mounted on a shaft 8.
  • the shaft 7 is mounted in the housing 1 and with a not shown electric drive connected, which is also arranged in the housing 1.
  • Figure 2 shows the control regime of exhaust and intake air, which is to be generated with this exhaust gas recirculation valve. Based on an opening cross section (vertical axis) of 100% of the intake air (solid line) and 0% of the exhaust gas (dashed line), the opening cross section of the intake air should remain unchanged up to an opening cross section of 40% for the exhaust gas. The flaps were swiveled to this point by 45 ° (horizontal axis). Only when a further At ⁇ increase of the opening cross section of the exhaust gas to the intake air Publ ⁇ voltage cross section can be reduced, whereby the opening area of the intake air is to be not less than 30% at the fully open the first flap 7 in the exhaust passage. 2
  • the following figures show the cut housing 1 with the channels 2-4 and the flaps 7, 9.
  • the first flap 7 is rotatably mounted on the shaft 9.
  • At the downstream side of the valve 7 is embodied as a web Verbin ⁇ -making element 10 is molded in one piece.
  • the second flap 9 is integrally formed on ⁇ .
  • the flaps 7, 9 and the web 10 form an integral component, which is made of plastic by injection molding.
  • the second flap 9 has on the web 10 side facing a right angle angled edge 11.
  • the edge 11 is to prevent that in a flap position of FIG. 4, the intake air flows over the exhaust duct 2 edge facing the mixing channel 4. Further, the edge 11 can serve as a stop for limiting the pivotal movement of the flaps.
  • the edge 11 attaches to the channel. This serves as a contact point for the edge 11.
  • the edge 11 closes the first flap 7 the exhaust passage 2, while the second flap 9, the intake passage 3 is completely free.
  • the second flap 9 is in This position is completely positioned in the transition of the exhaust passage 2 to the mixing channel 4, so that the intake air flows without Be ⁇ obstacles to the mixing channel 4.
  • the first flap 7 releases the opening cross section of the exhaust gas duct 2 by 40%.
  • the second flap 9 has been pivoted so far in the direction of the on ⁇ suction duct 3, that it leaves him just completely open. If the flaps 7, 9 further pivoted, the edge 11 abuts the channel wall as a stop. In this position, the first flap 7 is fully open and the second flap 9 in its maximum closed position. Due to the larger cross section of the intake passage 3, the intake air is throttled to 30%. The protruding into the channel edge 12 is bent in the flow direction. This reduces the flow resistance in the closed position.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Multiple-Way Valves (AREA)
  • Lift Valve (AREA)

Abstract

The invention relates to a valve for regulating two gas flows, comprising a housing (1), two channels (2, 3) arranged in the housing for conducting a respective gas, a first flap (7) arranged in the first channel (2) for opening and closing the first channel (2), said first flap (7) being rotatably arranged on a shaft (8), an electric motor for actuating the shaft (8), a second flap (9) for opening and closing the second channel (3), and a third channel (4) into which the first and the second channel (2, 3) lead. A connecting element (10) is arranged on the first flap (7), and the first flap is connected to the second flap (9).

Description

Beschreibung description
Ventil Valve
Gegenstand der Erfindung ist ein Ventil zur Regelung zweier Gasströme mit einem Gehäuse, zwei in dem Gehäuse angeordneten Kanälen zum Leiten jeweils eines Gases, einer in dem ersten Kanal angeordneten ersten Klappe zum Öffnen und Schließen des ersten Kanals, wobei die erste Klappe auf einer Welle drehbar angeordnet ist, einem Elektromotor zum Betätigen der Welle, einer zweiten Klappe zum Öffnen und Schließen des zweiten Kanals und einem dritten Kanal, in den der erste und zweite Kanal mündet. The invention relates to a valve for controlling two gas flows with a housing, two arranged in the housing channels for guiding each of a gas, arranged in the first channel first flap for opening and closing the first channel, wherein the first flap rotatable on a shaft is arranged, an electric motor for actuating the shaft, a second flap for opening and closing the second channel and a third channel, in which the first and second channel opens.
Derartige Gehäuse werden als Mischventile in Kraftfahrzeugen, insbesondere als Abgasrückführventile eingesetzt und sind allgemein bekannt. Derartige Ventile besitzen einen Kanal für die angesaugte Frischluft und einen zweiten Kanal für das Abgas. In jedem Kanal ist eine Klappe angeordnet, welche durch Verschwenken den jeweiligen Kanalquerschnitt öffnet oder verschließt. Such housings are used as mixing valves in motor vehicles, in particular as exhaust gas recirculation valves and are generally known. Such valves have a channel for the intake fresh air and a second channel for the exhaust gas. In each channel, a flap is arranged, which opens or closes the respective channel cross-section by pivoting.
Stromabwärts der beiden Klappen münden die beiden Kanäle in einen dritten Kanal, in dem die Gasströme der beiden Kanäle zusammengeführt werden. Für die Zumischung des Abgases zur Ansaugluft ist nach einem bestimmten Regime, bei dem jedem Schwenkwinkel der ersten Klappe ein bestimmter Schwenkwinkel der zweiten Klappe zugeordnet ist. Damit muss die Ansteuerung der zweiten Klappe immer in Abhängigkeit der ersten Klappe erfolgen. Aus diesem Grund ist es bekannt, eine Klappe mit einem elektromotorischen Antrieb und die zweite Klappe über ein Zahnradgetriebe anzu¬ steuern. Das Zahnradgetriebe ist ebenfalls mit dem elektro¬ motorischen Antrieb verbunden, so dass der elektromotorische Antrieb beide Klappen ansteuert. Das Zahnradgetriebe ist jedoch so gestaltet, dass das Verschwenken der zweiten Klappe in Abhängigkeit der ersten Klappe gemäß dem vorgegebenen Regime erfolgt. Nachteilig dabei ist, dass der Aufwand für das Downstream of the two flaps, the two channels open into a third channel, in which the gas flows of the two channels are merged. For the admixture of the exhaust gas to the intake air is after a certain regime in which each pivot angle of the first flap is associated with a specific pivot angle of the second flap. Thus, the control of the second flap must always be carried out in response to the first flap. For this reason, it is known to control a flap with an electromotive drive and the second flap via a gear transmission ¬ . The gear transmission is also connected to the electric ¬ motor drive, so that the electric motor drive controls both flaps. However, the gear transmission is designed so that the pivoting of the second flap in response to the first flap takes place in accordance with the predetermined regime. The disadvantage here is that the effort for the
Zahnradgetriebe sehr hoch ist. Neben den vielen zusätzlichen Getriebebauteilen ist auch der gehäuseseitige Aufwand mit den vielen Lagerstellen nicht unerheblich. Zudem erfordert ein solches Getriebe zusätzlichen Bauraum. Gear transmission is very high. In addition to the many additional transmission components and the housing side effort with the many bearings not insignificant. In addition, such a transmission requires additional space.
Der Erfindung liegt daher die Aufgabe zugrunde, ein Ventil der eingangs genannten Art zu schaffen, welches einfacher aufgebaut ist. Insbesondere soll die Anzahl der erforderlichen Bauteile reduziert werden. The invention is therefore an object of the invention to provide a valve of the type mentioned, which is simpler. In particular, the number of required components should be reduced.
Gelöst wird die Aufgabe dadurch, dass an der ersten Klappe ein Verbindungselement angeordnet ist, und dass das Verbindungs¬ element mit der zweiten Klappe verbunden ist. The object is achieved in that a connecting element is arranged on the first flap, and that the connecting ¬ element is connected to the second flap.
Mit dem Verbindungselement wird die zweite Klappe in Bezug auf die erste Klappe und zum Gehäuse positioniert. Desweiteren wird mit dem Verbindungselement der Schwenkwinkel der zweiten Klappe in Abhängigkeit vom Schwenkwinkel der ersten Klappe nach einem vorgegebenen Bewegungsregime bestimmt. Während bisherige Koppelmechanismen ausgehend von der Welle einer Klappe die Bewegung gemäß des vorgegebenen Bewegungsregimes auf die Welle der anderen Klappe übertragen, wird mit diesem Ventil dieWith the connecting element, the second flap is positioned with respect to the first flap and to the housing. Furthermore, the pivoting angle of the second flap is determined with the connecting element as a function of the pivoting angle of the first flap in accordance with a predetermined movement regime. While previous coupling mechanisms transmitted from the shaft of a flap, the movement according to the predetermined movement regime on the shaft of the other flap, with this valve the
Bewegung einer Klappe direkt auf die zweite Klappe übertragen. Damit entfällt nicht nur der Koppelmechanismus zwischen den beiden Wellen, sondern auch die Welle für die zweite Klappe. Das erfindungsgemäße Ventil zeichnet sich durch den Wegfall eines Koppelmechanismuses , der zweiten Welle und deren Lagerung durch besonders wenige Bauteile aus. Dadurch ist dieses Ventil sehr kompakt und benötigt wenig Bauraum. Infolge der wenigen Bauteile ist die Montage sehr einfach und das Ventil besitzt ein geringes Gewicht . Move a flap directly to the second flap. This eliminates not only the coupling mechanism between the two shafts, but also the shaft for the second flap. The valve according to the invention is characterized by the omission of a coupling mechanism, the second shaft and their storage by particularly few components. This makes this valve very compact and requires little space. Due to the few components, the assembly is very simple and the valve has a low weight.
Eine besonders einfache Montage ist gegeben, wenn das Ver¬ bindungselement mit beiden Klappen lösbar verbunden ist. Im einfachsten Fall sind die Bauteile miteinander verschraubt oder über Rast- und Steckverbindungen miteinander verbunden. In dieser Ausgestaltung besitzen sowohl die Klappen als auch das Verbindungselement einen relativ einfachen Aufbau. In einer anderen Ausgestaltung ist das Verbindungselement mit mindestens einer Klappe, einteilig ausgebildet. Das Verbin¬ dungselement wird dabei zusammen mit der mindestens einen Klappe hergestellt, so dass keine zusätzliche Montage von Klappe und Verbindungselement erforderlich ist. Bei einem Ventil mit zwei Klappen ist es besonders vorteilhaft, wenn beide Klappen und das Verbindungelement ein Bauteil sind. Auch bei unterschiedlicher Klappengestaltung lässt sich ein solches Bauteil relativ einfach beispielsweise aus Druckguß oder mittels Spritzgießen her- stellen. Somit entfällt die Montage zwischen den Klappen und dem Verbindungsteil . A particularly simple assembly is given when the Ver ¬ binding element is detachably connected to both flaps. In the simplest case, the components are bolted together or connected via snap-in and plug-in connections. In this embodiment, both the flaps and the connecting element have a relatively simple structure. In another embodiment, the connecting element with at least one flap, integrally formed. The connec ¬ tion element is made together with the at least one flap, so that no additional assembly of flap and connecting element is required. In a valve with two flaps, it is particularly advantageous if both flaps and the connecting element are a component. Even with different flap design, such a component can be produced relatively simply, for example, by die casting or by injection molding. Thus eliminates the assembly between the flaps and the connecting part.
In einer weiteren Ausgestaltung bestehen die beiden Klappen aus dem gleichen Werkstoff. Das hat den Vorteil, dass gegebenenfalls eine Bauform für beide Klappen verwendet werden kann. In a further embodiment, the two flaps are made of the same material. This has the advantage that, if necessary, a design for both flaps can be used.
In einer anderen Ausgestaltung bestehen beide Klappen aus unterschiedlichen Werkstoffen. Dies können sowohl unterschiedliche Metalle, Metalllegierungen und Kunststoffe sein. Es ist aber auch möglich eine Klappe aus einem Metall oder einer Metalllegierung und die andere Klappe aus einem Kunststoff herzustellen. Aufgrund der thermischen Belastung ist es vorteilhaft die Klappe im Abgaskanal aus Metall herzustellen, während die Klappe im Ansaugkanal aus Kunststoff bestehen kann. In another embodiment, both flaps made of different materials. These can be different metals, metal alloys and plastics. But it is also possible to produce a flap of a metal or a metal alloy and the other flap of a plastic. Due to the thermal load, it is advantageous to produce the flap in the exhaust duct made of metal, while the flap in the intake duct may be made of plastic.
In einer vorteilhaften Ausgestaltung besteht das Verbindungselement aus dem gleichen Werkstoff wie mindestens eine der beiden Klappen. Dies ermöglicht es, das Verbindungselement zusammen mit einer Klappe als ein Bauteil herzustellen. Ins- besondere wenn Verbindungselement und Klappe aus Kunststoff bestehen, lassen sie sich besonders einfach und mit vielen Gestaltungsmöglichkeiten mittels Spritzgießen herstellen. In an advantageous embodiment, the connecting element consists of the same material as at least one of the two flaps. This makes it possible to manufacture the connecting element together with a flap as a component. In particular, when connecting element and flap are made of plastic, they can be produced very easily and with many design options by injection molding.
Je nach Bewegungsablauf des Verschwenkens der zweiten Klappe ergeben sich größere Dichtbereiche als bei einer drehbar auf einer Welle angeordneten Klappe. Um auch in diesen Fällen ein zuverlässiges Abdichten des Kanals zu gewährleisten besitzt die zweite Klappe eine rechteckförmige Form, während der zweite Kanal zumindest im Schwenkbereich der zweiten Klappe einen korrespondierenden rechteckförmigen Kanalquerschnitt besitzt. An einem Ausführungsbeispiel wird die Erfindung näher be¬ schrieben. Es zeigen in: Depending on the sequence of movements of the pivoting of the second flap, larger sealing areas result than in the case of a flap arranged rotatably on a shaft. In order to ensure a reliable sealing of the channel in these cases has the second flap a rectangular shape, while the second channel has at least in the pivoting range of the second flap has a corresponding rectangular channel cross-section. In one embodiment, the invention will be described in more detail ¬ . Show in:
Fig. 1 das Gehäuse eines Abgasrückführventils , Fig. 2 ein Diagramm mit den Öffnungscharakteristiken Fig. 1 shows the housing of an exhaust gas recirculation valve, Fig. 2 is a diagram with the opening characteristics
beider Klappen und  both valves and
Fig. 3 - 5 verschiedene Stellungen der Klappen des Ventils nach Fig. 3 - 5 different positions of the valves of the valve
Figur 1.  FIG. 1
Das Abgasrückführventil in Figur 1 besteht aus einem Gehäuse 1, welches einen ersten Kanal 2 und einen zweiten Kanal 3 und einen dritten Kanal 4 besitzt. Der erste Kanal 2 ist der Abgaskanal, über den das Abgas der Ansaugluft zugeführt werden kann. Der zweite Kanal 3 ist der Ansaugkanal, über den die angesaugte Luft geleitet wird. Der dritte Kanal 4 ist der Mischkanal, über den die beiden Gasströme weitergeleitet werden. Der Abgaskanal 2 besitzt einen runden Querschnitt, während der Ansaugkanal 3 und der Mischkanal 4 einen rechteckförmigen Querschnitt besitzen. Es ist auch möglich, dass in Abhängigkeit von der Geometrie der anzuschließenden Leitungen der Einlass 5 des Ansaugkanals 3 und der Auslass 6 des Mischkanals 4 ebenfalls einen runden Quer¬ schnitt aufweisen. Der rechteckförmige Kanalquerschnitt beider Kanäle 3, 4 wäre in diesem Fall auf den Mittelteil des Gehäuses 1 beschränkt. Darüber hinaus sind aber auch andere Kanal¬ querschnitte, z. B. halbkreis- oder dreieckförmig, denkbar. Ebenso kann anstelle eines einteiligen Gehäuses ein mehrteiliges Gehäuse, insbesondere für den Abgas- und Ansaugkanal zum Einsatz kommen . The exhaust gas recirculation valve in FIG. 1 consists of a housing 1 which has a first channel 2 and a second channel 3 and a third channel 4. The first channel 2 is the exhaust passage, through which the exhaust gas of the intake air can be supplied. The second channel 3 is the intake passage through which the sucked air is passed. The third channel 4 is the mixing channel, through which the two gas streams are forwarded. The exhaust passage 2 has a round cross section, while the intake passage 3 and the mixing passage 4 have a rectangular cross section. It is also possible that, depending on the geometry of the lines to be connected to the inlet 5 of the intake duct 3 and the outlet 6 of the mixing channel 4 also has a round cross-section have ¬. The rectangular channel cross section of both channels 3, 4 would be limited in this case to the central part of the housing 1. In addition, however, other channel ¬ cross sections, z. B. semicircular or triangular, conceivable. Likewise, instead of a one-piece housing, a multi-part housing, in particular for the exhaust gas and intake duct can be used.
Im Abgaskanal 2 ist eine erste Klappe 7 drehbar auf einer Welle 8 angeordnet. Die Welle 7 ist im Gehäuse 1 gelagert und mit einem nicht dargestellten elektrischen Antrieb verbunden, der ebenfalls im Gehäuse 1 angeordnet ist. In the exhaust passage 2, a first flap 7 is rotatably mounted on a shaft 8. The shaft 7 is mounted in the housing 1 and with a not shown electric drive connected, which is also arranged in the housing 1.
Figur 2 zeigt das Regelregime von Abgas und angesaugter Luft, welches mit diesem Abgasrückführventil erzeugt werden soll. Ausgehend von einem Öffnungsquerschnitt (senkrechte Achse) von 100 % der Ansaugluft (durchgehende Linie) und 0 % des Abgases (gestrichelte Linie) soll der Öffnungsquerschnitt der Ansaugluft bis zu einem Öffnungsquerschnitt von 40 % für das Abgas un- verändert bleiben. Die Klappen wurden bis zu diesem Punkt um 45° (waagerechte Achse) verschwenkt. Erst bei einem weiteren An¬ steigen des Öffnungsquerschnitt des Abgases soll der Öff¬ nungsquerschnitt der Ansaugluft verringert werden, wobei der Öffnungsquerschnitt des Ansaugluft nicht kleiner als 30 % bei vollständig geöffneter erster Klappe 7 im Abgaskanal 2 werden soll . Figure 2 shows the control regime of exhaust and intake air, which is to be generated with this exhaust gas recirculation valve. Based on an opening cross section (vertical axis) of 100% of the intake air (solid line) and 0% of the exhaust gas (dashed line), the opening cross section of the intake air should remain unchanged up to an opening cross section of 40% for the exhaust gas. The flaps were swiveled to this point by 45 ° (horizontal axis). Only when a further At ¬ increase of the opening cross section of the exhaust gas to the intake air Publ ¬ voltage cross section can be reduced, whereby the opening area of the intake air is to be not less than 30% at the fully open the first flap 7 in the exhaust passage. 2
Die folgenden Figuren zeigen das geschnittene Gehäuse 1 mit den Kanälen 2 - 4 und den Klappen 7, 9. Die erste Klappe 7 ist auf der Welle 9 drehbar angeordnet. An der stromabwärts gerichteten Seite der Klappe 7 ist ein als Steg ausgebildetes Verbin¬ dungselement 10 einteilig angeformt. Auf der anderen Seite des Verbindungselements 10 ist die zweite Klappe 9 einteilig an¬ geformt. Die Klappen 7, 9 und der Steg 10 bilden ein integrales Bauteil, welches aus Kunststoff mittels Spritzgießen hergestellt ist. Die zweite Klappe 9 besitzt auf der dem Steg 10 zugewandten Seite eine rechtwinklig abgewinkelte Kante 11. Die Kante 11 soll verhindern, dass in einer Klappenstellung nach Fig. 4 die Ansaugluft über die dem Abgaskanal 2 zugewandte Kante zum Mischkanal 4 strömt. Weiter kann die Kante 11 als Anschlag zur Begrenzung der Schwenkbewegung der Klappen dienen. Im vorliegenden Fall legt sich die Kante 11 an den Kanal an. Dieser dient als Anlagepunkt für die Kante 11. In der in Figur 3 gezeigten Darstellung verschließt die erste Klappe 7 den Abgaskanal 2, während die zweite Klappe 9 den Ansaugkanal 3 vollständig frei gibt. Die zweite Klappe 9 ist in dieser Position vollständig in dem Ubergang des Abgaskanals 2 zum Mischkanal 4 positioniert, so dass die Ansaugluft ohne Be¬ hinderungen zum Mischkanal 4 strömt. The following figures show the cut housing 1 with the channels 2-4 and the flaps 7, 9. The first flap 7 is rotatably mounted on the shaft 9. At the downstream side of the valve 7 is embodied as a web Verbin ¬-making element 10 is molded in one piece. On the other side of the connecting element 10, the second flap 9 is integrally formed on ¬ . The flaps 7, 9 and the web 10 form an integral component, which is made of plastic by injection molding. The second flap 9 has on the web 10 side facing a right angle angled edge 11. The edge 11 is to prevent that in a flap position of FIG. 4, the intake air flows over the exhaust duct 2 edge facing the mixing channel 4. Further, the edge 11 can serve as a stop for limiting the pivotal movement of the flaps. In the present case, the edge 11 attaches to the channel. This serves as a contact point for the edge 11. In the illustration shown in Figure 3 closes the first flap 7 the exhaust passage 2, while the second flap 9, the intake passage 3 is completely free. The second flap 9 is in This position is completely positioned in the transition of the exhaust passage 2 to the mixing channel 4, so that the intake air flows without Be ¬ obstacles to the mixing channel 4.
In Figur 4 gibt die erste Klappe 7 den Öffnungsquerschnitt des Abgaskanals 2 zu 40 % frei. Bei diesem Schwenkwinkel der ersten Klappe wurde die zweite Klappe 9 soweit in Richtung des An¬ saugkanals 3 verschwenkt, dass sie ihn gerade noch vollständig offen lässt. Werden die Klappen 7, 9 weiter verschwenkt, stößt die Kante 11 als Anschlag an die Kanalwandung. In dieser Stellung ist die erste Klappe 7 vollständig geöffnet und die zweite Klappe 9 in ihrer maximalen Schließstellung. Aufgrund des größeren Querschnitts des Ansaugkanals 3 ist die Ansaugluft auf 30 % gedrosselt. Die in den Kanal hinein ragende Kante 12 ist in Strömungsrichtung gebogen. Damit wird der Strömungswiderstand in Schließstellung reduziert. In FIG. 4, the first flap 7 releases the opening cross section of the exhaust gas duct 2 by 40%. In this pivoting angle of the first flap, the second flap 9 has been pivoted so far in the direction of the on ¬ suction duct 3, that it leaves him just completely open. If the flaps 7, 9 further pivoted, the edge 11 abuts the channel wall as a stop. In this position, the first flap 7 is fully open and the second flap 9 in its maximum closed position. Due to the larger cross section of the intake passage 3, the intake air is throttled to 30%. The protruding into the channel edge 12 is bent in the flow direction. This reduces the flow resistance in the closed position.

Claims

Ventil zur Regelung zweier Gasströme mit einem Gehäuse, zwei in dem Gehäuse angeordneten Kanälen zum Leiten jeweils eines Gases, einer in dem ersten Kanal angeordneten ersten Klappe zum Öffnen und Schließen des ersten Kanals, wobei die erste Klappe auf einer Welle drehbar angeordnet ist, einem Elektromotor zum Betätigen der Welle, einer zweiten Klappe zum Öffnen und Schließen des zweiten Kanals und einem dritten Kanal, in den der erste und zweite Kanal mündet, d a d u r c h g e k e n n z e i c h n e t , dass an der ersten Klappe (7) ein Verbindungselement (10) angeordnet ist, und dass das Verbindungselement (10) mit der zweiten Klappe (9) verbunden ist. Valve for controlling two gas flows with a housing, two arranged in the housing channels for guiding a respective gas, arranged in the first channel first flap for opening and closing the first channel, wherein the first flap is rotatably mounted on a shaft, an electric motor for actuating the shaft, a second flap for opening and closing the second channel and a third channel into which opens the first and second channels, characterized in that a connecting element (10) is arranged on the first flap (7), and in that Connecting element (10) with the second flap (9) is connected.
Ventil nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , dass das Verbindungselement (10) mit beiden Klappen (7, 9) lösbar verbunden ist. Valve according to claim 1, characterized in that the connecting element (10) is detachably connected to both flaps (7, 9).
Ventil nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , dass das Verbindungselement (10) mit mindestens einer Klappe (7, 9), vorzugsweise der Klappe (9) des Ansaugkanals (3), einteilig ausgebildet ist. Valve according to claim 1, characterized in that the connecting element (10) with at least one flap (7, 9), preferably the flap (9) of the intake duct (3), is integrally formed.
Ventil nach zumindest einem der vorhergehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t , dass beide Klappen (7, 9) aus dem gleichen Werkstoff bestehen. Valve according to at least one of the preceding claims, characterized in that both flaps (7, 9) consist of the same material.
Ventil nach zumindest einem der vorhergehenden Ansprüche 1 bis 3, d a d u r c h g e k e n n z e i c h n e t , dass beide Klappen (7, 9) aus unterschiedlichen Werkstoffen bestehen . Valve according to at least one of the preceding claims 1 to 3, characterized in that both flaps (7, 9) consist of different materials.
Ventil nach zumindest einem der vorhergehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t , dass das Verbindungselement (10) aus dem gleichen Werkstoff wie eine der beiden Klappen (7, 9) besteht. Ventil nach zumindest einem der vorhergehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t , dass die zweite Klappe (9) eine rechteckförmige Form besitzt und dass der zweite Kanal (3) zumindest im Schwenkbereich der zweiten Klappe (9) einen korrespondierenden rechteckförmigen Kanalquerschnitt besitzt. Valve according to at least one of the preceding claims, characterized in that the connecting element (10) consists of the same material as one of the two flaps (7, 9). Valve according to at least one of the preceding claims, characterized in that the second flap (9) has a rectangular shape and that the second channel (3) at least in the pivoting region of the second flap (9) has a corresponding rectangular channel cross-section.
Ventil nach zumindest einem der vorhergehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t , dass zumindest eine der Klappen (7, 9) einen Anschlag (11) besitzt. Valve according to at least one of the preceding claims, characterized in that at least one of the flaps (7, 9) has a stop (11).
EP13795755.1A 2012-11-27 2013-11-26 Valve Withdrawn EP2926039A1 (en)

Applications Claiming Priority (2)

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DE102012221621.9A DE102012221621A1 (en) 2012-11-27 2012-11-27 Valve
PCT/EP2013/074686 WO2014082983A1 (en) 2012-11-27 2013-11-26 Valve

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DE (1) DE102012221621A1 (en)
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WO2014082983A1 (en) 2014-06-05
DE102012221621A1 (en) 2014-06-12
US9803591B2 (en) 2017-10-31
US20150292446A1 (en) 2015-10-15
CN104813083A (en) 2015-07-29

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