EP1826375B1 - Switching valve and method of manufacturing the same - Google Patents

Switching valve and method of manufacturing the same Download PDF

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Publication number
EP1826375B1
EP1826375B1 EP20060126373 EP06126373A EP1826375B1 EP 1826375 B1 EP1826375 B1 EP 1826375B1 EP 20060126373 EP20060126373 EP 20060126373 EP 06126373 A EP06126373 A EP 06126373A EP 1826375 B1 EP1826375 B1 EP 1826375B1
Authority
EP
European Patent Office
Prior art keywords
flap
sealing
section
throttle
gap
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 - Fee Related
Application number
EP20060126373
Other languages
German (de)
French (fr)
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EP1826375A1 (en
Inventor
Dr. Alfred Elsäßer
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.)
Mahle International GmbH
Original Assignee
Mahle International GmbH
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Filing date
Publication date
Application filed by Mahle International GmbH filed Critical Mahle International GmbH
Publication of EP1826375A1 publication Critical patent/EP1826375A1/en
Application granted granted Critical
Publication of EP1826375B1 publication Critical patent/EP1826375B1/en
Expired - Fee Related 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
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
    • F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
    • F02D9/107—Manufacturing or mounting details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
    • F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
    • F02D9/1005—Details of the flap
    • F02D9/101—Special flap shapes, ribs, bores or the like
    • F02D9/1015—Details of the edge of the flap, e.g. for lowering flow noise or improving flow sealing in closed flap position
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/0318—Processes
    • Y10T137/0402—Cleaning, repairing, or assembling
    • Y10T137/0491—Valve or valve element assembling, disassembling, or replacing
    • Y10T137/0525—Butterfly valve

Definitions

  • the present invention relates to a switching valve for controlling a gas flow in a gas line of an internal combustion engine, in particular in a motor vehicle.
  • the invention also relates to a method for producing such a switching valve.
  • Such switching valves are used in internal combustion engines, for example, as throttle valves in a fresh gas line of the internal combustion engine or as air timing valves for pulse charging of the internal combustion engine for use.
  • a flap of the switching valve assumes its closed position, at the same time the switching valves should work as low as possible; Similarly, the achievability of the shortest possible switching times may be desirable.
  • a similar valve is also in US 5,794,591 offenbahrt.
  • a throttle gap seal to minimize to provide the leakage when adjusted in its closed position valve member.
  • This throttle gap seal is formed in that in the closed position of the flap valve designed as a valve member radially between a flap edge and a flap facing sealing surface a throttle sealing gap is formed.
  • the sealing surface is formed on an insert part, which encloses the flap along the flap edge in the circumferential direction.
  • Said insert has the flow cross section of the gas line and is arranged in a corresponding receptacle and thereby sunk into the gas line. To the gas line towards the insert is sealed with a seal.
  • the insert is attached to the gas line.
  • the restrictor seal gap can be adjusted.
  • a predetermined geometry can be generated with relatively high precision for the throttle sealing gap.
  • the sealing effect of the throttle sealing gap is determined by the geometry, ie by gap length and gap width of the throttle sealing gap arranged between the flap edge and the sealing surface.
  • the present invention addresses the problem of providing an improved embodiment for a switching valve of the type mentioned above and for an associated manufacturing method, which is characterized in particular by the fact that the throttle sealing gap with high precision can be produced, while the production costs remain relatively low.
  • the invention is based on the general idea to produce or form the throttle sealing gap only in the context of the completion of the flap and / or the sealing surface having sealing portion, wherein flap and sealing portion are in a relative position or desired position to each other during the manufacture or training of the throttle sealing gap which occupy the flap and the sealing portion relative to each other even when the switching valve is fully assembled.
  • the desired geometry for the throttle sealing gap can be produced with a relatively high quality, at the same time the required effort is relatively low, since in the design and manufacture of the throttle sealing gap, the flap and the sealing portion are relative to each other in the desired position. In a certain way, manufacturing tolerances of the sealing section on the one hand and the flap on the other hand can be eliminated as it were.
  • This separate sealing body can be independent of the remaining line section of the switching valve together with the flap form an assembly whose components, so the flap and the sealing body for the production or training of the throttle sealing gap relative to each other in the above-mentioned desired position can be positioned, which simplifies the production of the precise throttle sealing gap.
  • Fig. 1 and 2 comprises a switching valve 1, which serves to control a gas flow in a gas line, not shown here, of an internal combustion engine, preferably in a motor vehicle, a line section 2 and an actuator 3.
  • the line section 2 is equipped for installation in said gas line.
  • the line section 2 is designed for this purpose as an axial section of the gas line, which can be inserted into an axial interruption of the gas line provided for this purpose and subsequently forms part of the gas line with regard to the gas guide.
  • the conduit section 2 has two axial flange sides 4, only one of which faces the observer.
  • At least one of these end faces 4 is designed substantially planar and lies in a plane which extends perpendicular to the flow direction, ie perpendicular to the axial or longitudinal direction of the line section 2 and thus the gas line in the region of the switching valve 1.
  • the conduit section 2 is provided with four eyes 5, which are circumferentially spaced from each other and project laterally outwards and contain the axially oriented through-holes 6.
  • the flange sides 4 come to suitably configured flanges of the gas line axially to the plant.
  • the line section 2 and thus the entire switching valve 1 can be attached to said flanges of the gas lines.
  • the through holes 6 are penetrated by screws or bolts.
  • At least one of the flange 4 is provided with an axially open groove 7, which rotates closed in the circumferential direction.
  • the groove 7 serves to receive an axial seal, not shown, which cooperates in the assembled state with a corresponding sealing surface of the adjacent flange mentioned above.
  • the actuator 3 has a housing 8, of which at least one component, e.g. a housing bottom designated 9, is integrally formed on the line section 2.
  • the line section 2 is a plastic injection molded part.
  • the integration of at least the housing bottom 9 in the line section 2 lowers the manufacturing costs for the switching valve. 1
  • the actuator 3 is for example an electromagnetic actuator; corresponding electrical connections are partially visible in the figures and designated 10.
  • the actuator 3 is used for the rotary actuation of an actuator, which is designed here as a flap 11, in particular as a so-called "butterfly flap".
  • the actuator 3 for example, with an in Fig. 2 recognizable drive shaft 12 drivingly connected, the actuator 3 to a transverse to the flow or axial direction Rotate axis 13 can drive.
  • the flap 11 is fixed against rotation on the drive shaft 12.
  • the actuator 3 can adjust the flap 11 at least between a reproduced in the figures closed position and a closed position preferably by 45 ° open position. In its closed position, the flap 11 blocks the flow cross-section of the line section 2, while it largely releases it in its open position.
  • the switching valve 1 is configured in a preferred embodiment as an air-clock valve, which is provided for mounting in a fresh gas line of the internal combustion engine. With the help of such an air cycle valve 1 can be achieved by utilizing dynamic flow processes a pulse charging the internal combustion engine. For this extremely short switching times for the air cycle valve, ie for the switching valve 1 are required. Accordingly, the actuator 3 is preferably designed as a high-speed adjusting device, with the aid of switching times between the closed position and the open position of the flap 11 can be reached, which may be less than 5 ms, in particular less than 3 ms.
  • Throttling sealing gap 17 is formed.
  • the sealing portion 15 grips the flap 11 along its flap edge 16 in the circumferential direction. Due to its geometry, which is defined mainly by a radially measured gap width and by an axially measured gap length, the throttle sealing gap 17 generates a more or less effective throttling action for a gas flow which seeks to bypass the flap 11 at its flap edge 16. Such a throttle gap seal 17 thus operates without contact, at least in the radial direction.
  • the flap edge 16 is the sealing surface 14 in the closed position of the flap 11 radially opposite, without this a continuous force between the flap edge 16 and the sealing surface 14 is present.
  • Particularly advantageous is an embodiment in which between the flap 11 and the sealing portion 15, no stop is formed, on which the flap 11 could come into abutment in its closed position.
  • the flap 11 also operates in the axial direction without contact. Overall, this results in an extremely low-friction and low-wear operation for the flap 11.
  • a stop for defining the closed position and / or open position can be provided, for example, internally in the actuator 3.
  • the line section 2 comprises a sealing body, which forms the sealing section 15 and is therefore also referred to below as 15.
  • the sealing body 15 forms an independent component and is manufactured separately from the remaining line section 2.
  • the sealing body 15 fixedly attached directly to the line section 2.
  • the sealing body 15 is fixed by means of two screws 18 on the line section 2.
  • the throttle sealing gap 17 In order to be able to provide the throttle sealing gap 17 with a particularly high precision with regard to its geometry, it is preferably produced by producing and / or shaping the flap 11 and / or the sealing surface 14, namely within the sealing section 15 or within the sealing body 15 That is, only with the completion of the flap 11 and / or sealing surface 14 of the throttle sealing gap 17 is formed. As a result, separate manufacturing tolerances of the flap 11 and sealing section or sealing body 15 are balanced with respect to the manufacturing tolerances of the throttle sealing gap 17.
  • the flap 11 is prefabricated, the flap 11, in particular in the region of its flap edge 16, not yet having its final shape.
  • the extent unfinished flap 11 is positioned in the sealing portion 15 and in the sealing body 15, in a predetermined relative position or desired position to it.
  • flap 11 and sealing section 15 or sealing body 15 are coordinated so that in this initial state in the radial direction between the flap edge 16 and the sealing surface 14 there is a distance which is reduced compared to the still to be produced throttle sealing gap 17 and against the gap width.
  • the flap edge 16 at least partially the sealing surface 14 touch and / or overlap.
  • the throttle sealing gap 17 is cut free by trimming the flap edge 16 and / or the sealing surface 14.
  • a laser cutting method or water jet cutting method is conceivable.
  • the flap 11 can be produced for example by injection molding, in particular made of plastic.
  • the sealing surface 14 in a casting mold for injection molding of the flap 11 form a wall portion which serves to limit the flap edge 16.
  • casting parameters such as temperature and pressure, and the flap material can be selected so that the throttle sealing gap 17 is formed by the solidification of the molded flap material by itself, by shrinkage of the cooling flap material.
  • the sealing surface 14 can be produced by injection molding, in which case the flap 11 or its flap edge 16 in a casting mold for injection molding of the sealing surface 14 forms a wall section which serves to delimit the sealing surface 14. Again, then the casting parameters and the material used can be selected so that the throttle sealing gap 17 is formed by self-solidification.
  • the prefabricated, but not yet finished flap 11 can be positioned in a predetermined relative position or desired position in the sealing section 15 or sealing body 15.
  • the unfinished flap 11 and the sealing section 15 or the sealing body 15 are preferably coordinated so that in this initial state between the flap edge 16 and the sealing surface 14 there is a distance which is increased compared to the yet yet to be manufactured throttle sealing gap 17 and its gap width.
  • the thus-positioned flap 11 can now be finally shaped by targeted heating and plastic deformation, such that the flap edge 16 moves in the direction of the sealing surface 14.
  • the throttle sealing gap 17 is formed simultaneously.
  • Such a forming process can be realized for example by so-called hot pressing. It is also possible to carry out the heating of the portion to be deformed by means of ultrasound.
  • the sealing body 15 it is in principle possible to design the sealing body 15 such that it can be used as a punching tool for punching out the flap 11 from a sheet material.
  • the sealing body 15 then has a corresponding cutting edge.
  • the sealing body 15 has a following on the cutting edge cross-sectional enlargement, which is dimensioned so that the stamped with the sealing body 15 flap 11 in the intended sealing cross-section then automatically forms the desired throttle sealing gap 17 relative to the sealing surface 14.
  • the formation of the throttle sealing gap 17 can be performed directly inside the conduit section 2, as long as the sealing section 15 forms an integral part of the conduit section 2.
  • the sealing portion 15 is formed by the relative to the line section 2 separable sealing body 15, the throttle sealing gap 17 can be separated from the remaining line section 2 within the desired position arrangement of flap 11 and sealing body 15 produce. This may be advantageous in view of the accessibility of the flap edge 16, the sealing surface 14 and / or the throttle sealing gap 17.
  • the flap 11 and the sealing body 15 can be attached to the remaining switching valve 1.
  • the sealing body 15 is preferably fastened to the conduit section 2.
  • the Flap 11 bolted to the drive shaft 12; as well as other fastening measures are conceivable.
  • the flap 11 is a component manufactured separately from the drive shaft 12 and is mounted in the assembled state to this.
  • a flow-leading inner cross section of the remaining line section 2 at least in an adjacent to the sealing body 15 axial region in particular slightly, be designed with a chamfer or larger than the flow-guiding inner cross section of the sealing body 15. In this way, for example, collisions between the flap edge 15 and the remaining line section 2 can be avoided.
  • the sealing body 15 has an axial end face 19 facing away from the observer, cf. Fig. 2 ,
  • This end face 19 is preferably designed flat and is located in an unspecified parting line on the line section 2.
  • the axis of rotation is 13.
  • the line section 2 has for receiving the sealing body 15 has a corresponding recess 20 which has a side face 21 complementary to the end face 19.
  • the axial end face radially outside a circumferentially circumferential step 22 is formed in accordance with the assembled state Fig. 1 the groove 7 radially inwardly and axially limited.
  • the groove 7 is therefore limited only radially outside of a wall not designated in detail of the recess 20 of the line section 2.
  • the observer facing, axial end face of the sealing body 15 preferably extends in a plane, in particular in the same plane as the side facing the viewer flange 4 of the line section. 2
  • a bearing section 23 is formed in a remote from the actuator 3 area, in which a remote from the actuator 3 end of the drive shaft 12 is rotatably mounted.
  • the bearing section 23 is configured comparatively stiff in order to be able to take up relatively high torques with respect to the rotation axis 13, without this leading to significant deformation of the line section 2.
  • the bearing portion 23 carries a holder 24, which is fixed for example by means of screws 25 on the bearing portion 23.
  • the holder 24 serves to prevent rotation of a torsion spring rod 26 which extends coaxially to the axis of rotation 13.
  • the torsion spring rod 26 extends coaxially within the drive shaft 12, which is designed for this purpose as a hollow shaft.
  • the drive shaft 12 is rotatably connected to the torsion bar 26 at a remote from the bearing portion 23 area.
  • the torsion bar 26 has its Neutral position centered between the closed position and the open position of the flap 11 and serves as a return device for the actuator 3.
  • the torsion bar 26 provides in each end position of the actuator 3, ie in the closed position and in the open position of the flap 11 potential energy at the beginning of each Shift phase allows a strong acceleration of the flap 11.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Lift Valve (AREA)

Description

Die vorliegende Erfindung betrifft ein Schaltventil zum Steuern einer Gasströmung in einer Gasleitung einer Brennkraftmaschine, insbesondere in einem Kraftfahrzeug. Die Erfindung betrifft außerdem ein Verfahren zum Herstellen eines derartigen Schaltventils.The present invention relates to a switching valve for controlling a gas flow in a gas line of an internal combustion engine, in particular in a motor vehicle. The invention also relates to a method for producing such a switching valve.

Derartige Schaltventile kommen bei Brennkraftmaschinen beispielsweise als Drosselklappen in einer Frischgasleitung der Brennkraftmaschine oder als Lufttaktventile zur Impulsaufladung der Brennkraftmaschine zur Anwendung. Von besonderem Interesse ist bei derartigen Schaltventilen die Erzielung einer hinreichenden Abdichtung der Gasleitung, wenn das jeweilige Ventilglied, in der Regel eine Klappe des Schaltventils seine Schließstellung einnimmt, wobei gleichzeitig die Schaltventile möglichst verschleißarm arbeiten sollen; ebenso kann die Erzielbarkeit möglichst kurzer Schaltzeiten wünschenswert sein. Ein ähnliches Ventil ist auch in US 5,794, 591 offenbahrt.Such switching valves are used in internal combustion engines, for example, as throttle valves in a fresh gas line of the internal combustion engine or as air timing valves for pulse charging of the internal combustion engine for use. Of particular interest in such switching valves to achieve adequate sealing of the gas line when the respective valve member, usually a flap of the switching valve assumes its closed position, at the same time the switching valves should work as low as possible; Similarly, the achievability of the shortest possible switching times may be desirable. A similar valve is also in US 5,794,591 offenbahrt.

Aus der EP 1 498 596 A2 ist es bekannt, bei einer Ventilanordnung zum Steuern einer Gasströmung in einer Gasleitung einer Brennkraftmaschine eine Drosselspaltdichtung zur Minimierung der Leckage bei in seine Schließstellung verstelltem Ventilglied vorzusehen. Diese Drosselspaltdichtung wird dadurch ausgebildet, dass in der Schließstellung des als Klappe ausgestalteten Ventilsglieds radial zwischen einer Klappenkante und einer der Klappe zugewandten Dichtfläche ein Drosseldichtspalt ausgebildet ist. Dabei ist bei der bekannten Ventilanordnung die Dichtfläche an einem Einlegeteil ausgebildet, das die Klappe entlang der Klappenkante in Umfangsrichtung einfasst. Besagtes Einlegeteil besitzt den Strömungsquerschnitt der Gasleitung und ist in einer entsprechenden Aufnahme angeordnet und dadurch in die Gasleitung versenkt eingesetzt. Zur Gasleitung hin ist das Einlegeteil mit einer Dichtung abgedichtet. Über diese Dichtung ist das Einlegeteil an der Gasleitung befestigt. Durch Positionieren des Einlegeteils relativ zur Klappe, die ihrerseits mit Bezug auf die Gasleitung ortsfest angeordnet ist, kann der Drosseldichtspalt justiert bzw. hergestellt werden. Hierdurch lässt sich mit relativ hoher Präzision für den Drosseldichtspalt eine vorbestimmte Geometrie erzeugen. Die Dichtungswirkung des Drosseldichtspalts wird durch die Geometrie, also durch Spaltlänge und Spaltweite des zwischen Klappenkante und Dichtfläche angeordneten Drosseldichtspalts bestimmt.From the EP 1 498 596 A2 It is known in a valve arrangement for controlling a gas flow in a gas line of an internal combustion engine, a throttle gap seal to minimize to provide the leakage when adjusted in its closed position valve member. This throttle gap seal is formed in that in the closed position of the flap valve designed as a valve member radially between a flap edge and a flap facing sealing surface a throttle sealing gap is formed. In this case, in the known valve arrangement, the sealing surface is formed on an insert part, which encloses the flap along the flap edge in the circumferential direction. Said insert has the flow cross section of the gas line and is arranged in a corresponding receptacle and thereby sunk into the gas line. To the gas line towards the insert is sealed with a seal. About this seal the insert is attached to the gas line. By positioning the insert relative to the flap, which in turn is stationary with respect to the gas line, the restrictor seal gap can be adjusted. As a result, a predetermined geometry can be generated with relatively high precision for the throttle sealing gap. The sealing effect of the throttle sealing gap is determined by the geometry, ie by gap length and gap width of the throttle sealing gap arranged between the flap edge and the sealing surface.

Die vorliegende Erfindung beschäftigt sich mit dem Problem, für ein Schaltventil der eingangs genannten Art sowie für ein zugehöriges Herstellungsverfahren eine verbesserte Ausführungsform anzugeben, die sich insbesondere dadurch auszeichnet, dass der Drosseldichtspalt mit hoher Präzision herstellbar ist, wobei gleichzeitig die Herstellungskosten relativ niedrig bleiben.The present invention addresses the problem of providing an improved embodiment for a switching valve of the type mentioned above and for an associated manufacturing method, which is characterized in particular by the fact that the throttle sealing gap with high precision can be produced, while the production costs remain relatively low.

Dieses Problem wird erfindungsgemäß durch die Gegenstände der unabhängigen Ansprüche gelöst. Vorteilhafte Ausführungsformen sind Gegenstand der abhängigen Ansprüche.This problem is solved according to the invention by the subject matters of the independent claims. Advantageous embodiments are the subject of the dependent claims.

Die Erfindung beruht auf dem allgemeinen Gedanken, den Drosseldichtspalt erst im Rahmen der Fertigstellung der Klappe und/oder des die Dichtfläche aufweisenden Dichtungsabschnitts herzustellen bzw. auszubilden, wobei sich Klappe und Dichtungsabschnitt während der Herstellung bzw. Ausbildung des Drosseldichtspalts in einer Relativlage oder Solllage zueinander befinden, welche die Klappe und der Dichtungsabschnitt auch bei fertig montiertem Schaltventil relativ zueinander einnehmen. Durch diese Bauweise lässt sich die für den Drosseldichtspalt gewünschte Geometrie mit einer relativ hohen Qualität herstellen, wobei gleichzeitig der hierfür erforderliche Aufwand vergleichsweise gering ist, da sich bei der Ausbildung und Herstellung des Drosseldichtspalts die Klappe und der Dichtungsabschnitt relativ zueinander in der Solllage befinden. In gewisser Weise lassen sich dadurch Herstellungstoleranzen des Dichtungsabschnitts einerseits und der Klappe andererseits quasi eliminieren.The invention is based on the general idea to produce or form the throttle sealing gap only in the context of the completion of the flap and / or the sealing surface having sealing portion, wherein flap and sealing portion are in a relative position or desired position to each other during the manufacture or training of the throttle sealing gap which occupy the flap and the sealing portion relative to each other even when the switching valve is fully assembled. By this design, the desired geometry for the throttle sealing gap can be produced with a relatively high quality, at the same time the required effort is relatively low, since in the design and manufacture of the throttle sealing gap, the flap and the sealing portion are relative to each other in the desired position. In a certain way, manufacturing tolerances of the sealing section on the one hand and the flap on the other hand can be eliminated as it were.

Besonders vorteilhaft ist hierfür die separat vom übrigen Leitungsabschnitt erfolgende Herstellung eines den Dichtungsabschnitt bildenden Dichtkörpers. Dieser separate Dichtkörper kann unabhängig vom übrigen Leitungsabschnitt des Schaltventils zusammen mit der Klappe eine Baugruppe bilden, deren Komponenten, also die Klappe und der Dichtkörper zur Herstellung bzw. Ausbildung des Drosseldichtspalts relativ zueinander in der vorstehend genannten Solllage positionierbar sind, was die Herstellung des präzisen Drosseldichtspalts vereinfacht.Particularly advantageous for this purpose is the separate production of the remaining line section producing a sealing portion forming the sealing body. This separate sealing body can be independent of the remaining line section of the switching valve together with the flap form an assembly whose components, so the flap and the sealing body for the production or training of the throttle sealing gap relative to each other in the above-mentioned desired position can be positioned, which simplifies the production of the precise throttle sealing gap.

Weitere wichtige Merkmale und Vorteile der Erfindung ergeben sich aus den Unteransprüchen, aus den Zeichnungen und aus der zugehörigen Figurenbeschreibung anhand der Zeichnungen.Other important features and advantages of the invention will become apparent from the dependent claims, from the drawings and from the associated figure description with reference to the drawings.

Es versteht sich, dass die vorstehend genannten und die nachstehend noch zu erläuternden Merkmale nicht nur in der jeweils angegebenen Kombination, sondern auch in anderen Kombinationen oder in Alleinstellung verwendbar sind, ohne den Rahmen der vorliegenden Erfindung zu verlassen.It is understood that the features mentioned above and those yet to be explained below can be used not only in the particular combination given, but also in other combinations or in isolation, without departing from the scope of the present invention.

Bevorzugte Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und werden in der nachfolgenden Beschreibung näher erläutert, wobei sich gleiche Bezugszeichen auf gleiche oder ähnliche oder funktional gleiche Bauteile beziehen.Preferred embodiments of the invention are illustrated in the drawings and will be described in more detail in the following description, wherein like reference numerals refer to the same or similar or functionally identical components.

Es zeigen, jeweils schematisch,

Fig. 1
eine perspektivische Ansicht eines Schaltventils,
Fig. 2
eine Ansicht wie in Fig. 1, jedoch in auseinander gezogener Darstellung sowie aus einem anderen Blickwinkel.
Show, in each case schematically,
Fig. 1
a perspective view of a switching valve,
Fig. 2
a view like in Fig. 1 , but in an exploded view as well as from a different angle.

Entsprechend den Fig. 1 und 2 umfasst ein Schaltventil 1, das zum Steuern einer Gasströmung in einer hier nicht dargestellten Gasleitung einer Brennkraftmaschine, vorzugsweise in einem Kraftfahrzeug, dient, einen Leitungsabschnitt 2 und einen Stellantrieb 3. Der Leitungsabschnitt 2 ist zum Einbau in besagte Gasleitung ausgestattet. Beispielsweise ist der Leitungsabschnitt 2 hierzu als Axialabschnitt der Gasleitung ausgestaltet, der in eine hierfür vorgesehene axiale Unterbrechung der Gasleitung einsetzbar ist und hinsichtlich der Gasführung anschließend einen Bestandteil der Gasleitung bildet. Bei der gezeigten Ausführungsform besitzt der Leitungsabschnitt 2 zwei axiale Flanschseiten 4, von denen nur eine dem Betrachter zugewandt ist. Zumindest eine dieser Stirnseiten 4 ist im wesentlichen eben ausgestaltet und liegt in einer Ebene, die sich senkrecht zur Strömungsrichtung, also senkrecht zur Axial- oder Längsrichtung des Leitungsabschnitts 2 und somit der Gasleitung im Bereich des Schaltventils 1 erstreckt. Bei der hier gezeigten Ausführungsform ist der Leitungsabschnitt 2 mit vier Augen 5 ausgestattet, die in Umfangsrichtung voneinander beabstandet sind und seitlich nach außen abstehen und die axial orientierte Durchgangsöffnungen 6 enthalten.According to the Fig. 1 and 2 comprises a switching valve 1, which serves to control a gas flow in a gas line, not shown here, of an internal combustion engine, preferably in a motor vehicle, a line section 2 and an actuator 3. The line section 2 is equipped for installation in said gas line. For example, the line section 2 is designed for this purpose as an axial section of the gas line, which can be inserted into an axial interruption of the gas line provided for this purpose and subsequently forms part of the gas line with regard to the gas guide. In the embodiment shown, the conduit section 2 has two axial flange sides 4, only one of which faces the observer. At least one of these end faces 4 is designed substantially planar and lies in a plane which extends perpendicular to the flow direction, ie perpendicular to the axial or longitudinal direction of the line section 2 and thus the gas line in the region of the switching valve 1. In the embodiment shown here, the conduit section 2 is provided with four eyes 5, which are circumferentially spaced from each other and project laterally outwards and contain the axially oriented through-holes 6.

Im montierten Zustand kommen die Flanschseiten 4 an entsprechend ausgestalteten Flanschen der Gasleitung axial zur Anlage. Mit Hilfe der Augen 5 lässt sich der Leitungsabschnitt 2 und somit das gesamte Schaltventil 1 an besagten Flanschen der Gasleitungen befestigen. Beispielsweise sind dann die Durchgangsöffnungen 6 von Schrauben oder Bolzen durchsetzt.In the mounted state, the flange sides 4 come to suitably configured flanges of the gas line axially to the plant. With the help of the eyes 5, the line section 2 and thus the entire switching valve 1 can be attached to said flanges of the gas lines. For example, then the through holes 6 are penetrated by screws or bolts.

Zumindest eine der Flanschseiten 4 ist mit einer axial offenen Nut 7 versehen, die in Umfangsrichtung geschlossen umläuft. Die Nut 7 dient zur Aufnahme einer nicht gezeigten Axialdichtung, die im montierten Zustand mit einer entsprechenden Dichtfläche des angrenzenden, vorstehend genannten Flansches zusammenwirkt.At least one of the flange 4 is provided with an axially open groove 7, which rotates closed in the circumferential direction. The groove 7 serves to receive an axial seal, not shown, which cooperates in the assembled state with a corresponding sealing surface of the adjacent flange mentioned above.

Der Stellantrieb 3 besitzt ein Gehäuse 8, von dem zumindest ein Bestandteil, z.B. ein mit 9 bezeichneter Gehäuseboden, integral am Leitungsabschnitt 2 ausgebildet ist. Beispielsweise ist der Leitungsabschnitt 2 ein aus Kunststoff hergestelltes Spritzgussteil. Die Integration zumindest des Gehäusebodens 9 in den Leitungsabschnitt 2 senkt die Herstellungskosten für das Schaltventil 1.The actuator 3 has a housing 8, of which at least one component, e.g. a housing bottom designated 9, is integrally formed on the line section 2. For example, the line section 2 is a plastic injection molded part. The integration of at least the housing bottom 9 in the line section 2 lowers the manufacturing costs for the switching valve. 1

Der Stellantrieb 3 ist beispielsweise ein elektromagnetischer Aktuator; entsprechende elektrische Anschlüsse sind in den Fig. teilweise erkennbar und mit 10 bezeichnet. Der Stellantrieb 3 dient zur drehenden Betätigung eines Stellglieds, das hier als Klappe 11, insbesondere als sogenannte "Schmetterlingsklappe", ausgestaltet ist. Hierzu ist der Stellantrieb 3 beispielsweise mit einer in Fig. 2 erkennbaren Antriebswelle 12 antriebsverbunden, die der Stellantrieb 3 um eine quer zur Strömungs- oder Axialrichtung verlaufende Drehachse 13 antreiben kann. Die Klappe 11 ist an der Antriebswelle 12 drehfest befestigt. Der Stellantrieb 3 kann die Klappe 11 zumindest zwischen einer in den Figuren wiedergegebenen Schließstellung und einer zur Schließstellung vorzugsweise um 45° versetzten Offenstellung verstellen. In ihrer Schließstellung sperrt die Klappe 11 den Strömungsquerschnitt des Leitungsabschnitt 2, während sie ihn in ihrer Offenstellung weitgehend freigibt.The actuator 3 is for example an electromagnetic actuator; corresponding electrical connections are partially visible in the figures and designated 10. The actuator 3 is used for the rotary actuation of an actuator, which is designed here as a flap 11, in particular as a so-called "butterfly flap". For this purpose, the actuator 3, for example, with an in Fig. 2 recognizable drive shaft 12 drivingly connected, the actuator 3 to a transverse to the flow or axial direction Rotate axis 13 can drive. The flap 11 is fixed against rotation on the drive shaft 12. The actuator 3 can adjust the flap 11 at least between a reproduced in the figures closed position and a closed position preferably by 45 ° open position. In its closed position, the flap 11 blocks the flow cross-section of the line section 2, while it largely releases it in its open position.

Das Schaltventil 1 ist bei einer bevorzugten Ausführungsform als Lufttaktventil ausgestaltet, das zur Montage in einer Frischgasleitung der Brennkraftmaschine vorgesehen ist. Mit Hilfe eines derartigen Lufttaktventils 1 lässt sich durch Ausnutzung dynamischer Strömungsvorgänge eine Impulsaufladung der Brennkraftmaschine erzielen. Hierzu sind extrem kurze Schaltzeiten für das Lufttaktventil, also für das Schaltventil 1 erforderlich. Dementsprechend ist der Stellantrieb 3 vorzugsweise als Hochgeschwindigkeitsstelleinrichtung ausgestaltet, mit deren Hilfe Schaltzeiten zwischen der Schließstellung und der Offenstellung der Klappe 11 erreichbar sind, die kleiner als 5 ms, insbesondere kleiner als 3 ms, sein können.The switching valve 1 is configured in a preferred embodiment as an air-clock valve, which is provided for mounting in a fresh gas line of the internal combustion engine. With the help of such an air cycle valve 1 can be achieved by utilizing dynamic flow processes a pulse charging the internal combustion engine. For this extremely short switching times for the air cycle valve, ie for the switching valve 1 are required. Accordingly, the actuator 3 is preferably designed as a high-speed adjusting device, with the aid of switching times between the closed position and the open position of the flap 11 can be reached, which may be less than 5 ms, in particular less than 3 ms.

Um den im Leitungsabschnitt 2 ausgebildeten Strömungsquerschnitt in der Schließstellung der Klappe 11 besonders effektiv sperren zu können, ist radial zwischen einer der Klappe 11 zugewandten Dichtfläche 14 eines Dichtungsabschnitt 15 des Leitungsabschnitts 2 und einer Klappenkante 16 der in die Schließstellung verstellten Klappe 11 ein Drosseldichtspalt 17 ausgebildet. Der Dichtungsabschnitt 15 fasst die Klappe 11 entlang deren Klappenkante 16 in Umfangsrichtung ein. Der Drosseldichtspalt 17 erzeugt aufgrund seiner Geometrie, die hauptsächlich durch eine radial gemessene Spaltbreite und durch eine axial gemessene Spaltlänge definiert ist, eine mehr oder weniger effektive Drosselwirkung für eine Gasströmung, welche die Klappe 11 an ihrer Klappenkante 16 zu umströmen sucht. Eine derartige Drosselspaltdichtung 17 arbeitet somit berührungslos, zumindest in radialer Richtung. Die Klappenkante 16 liegt der Dichtfläche 14 in der Schließstellung der Klappe 11 radial gegenüber, ohne dass hierbei eine kontinuierliche Krafteinwirkung zwischen der Klappenkante 16 und der Dichtfläche 14 vorliegt. Besonders vorteilhaft ist eine Ausführungsform, bei welcher zwischen der Klappe 11 und dem Dichtungsabschnitt 15 kein Anschlag ausgebildet ist, an dem die Klappe 11 in ihrer Schließstellung zur Anlage kommen könnte. Somit arbeitet die Klappe 11 auch in axialer Richtung berührungslos. Insgesamt ergibt sich für die Klappe 11 dadurch ein extrem reibungsarmer und verschleißarmer Betrieb. Ein Anschlag zur Definition der Schließstellung und/oder Offenstellung kann beispielsweise intern im Stellantrieb 3 vorgesehen sein.In order to lock the formed in the line section 2 flow cross section in the closed position of the flap 11 is particularly effective radially between a flap 11 facing sealing surface 14 of a sealing portion 15 of the line section 2 and a flap edge 16 of the adjusted position in the closed flap 11 a Throttling sealing gap 17 is formed. The sealing portion 15 grips the flap 11 along its flap edge 16 in the circumferential direction. Due to its geometry, which is defined mainly by a radially measured gap width and by an axially measured gap length, the throttle sealing gap 17 generates a more or less effective throttling action for a gas flow which seeks to bypass the flap 11 at its flap edge 16. Such a throttle gap seal 17 thus operates without contact, at least in the radial direction. The flap edge 16 is the sealing surface 14 in the closed position of the flap 11 radially opposite, without this a continuous force between the flap edge 16 and the sealing surface 14 is present. Particularly advantageous is an embodiment in which between the flap 11 and the sealing portion 15, no stop is formed, on which the flap 11 could come into abutment in its closed position. Thus, the flap 11 also operates in the axial direction without contact. Overall, this results in an extremely low-friction and low-wear operation for the flap 11. A stop for defining the closed position and / or open position can be provided, for example, internally in the actuator 3.

Bei der hier gezeigten, bevorzugten Ausführungsform umfasst der Leitungsabschnitt 2 einen Dichtkörper, der den Dichtungsabschnitt 15 bildet und im folgenden daher ebenfalls mit 15 bezeichnet wird. Der Dichtkörper 15 bildet ein unabhängiges Bauteil und ist separat vom übrigen Leitungsabschnitt 2 hergestellt. Im montierten Zustand ist der Dichtkörper 15 unmittelbar am Leitungsabschnitt 2 fest angebracht. Beispielsweise ist der Dichtkörper 15 mit Hilfe von zwei Schrauben 18 am Leitungsabschnitt 2 befestigt.In the preferred embodiment shown here, the line section 2 comprises a sealing body, which forms the sealing section 15 and is therefore also referred to below as 15. The sealing body 15 forms an independent component and is manufactured separately from the remaining line section 2. In the assembled state is the sealing body 15 fixedly attached directly to the line section 2. For example, the sealing body 15 is fixed by means of two screws 18 on the line section 2.

Um den Drosseldichtspalt 17 hinsichtlich seiner Geometrie mit einer besonders hohen Präzision bereitstellen zu können, wird er vorzugsweise durch das Herstellen und/oder formgebende Bearbeiten der Klappe 11 und/oder der Dichtfläche 14 hergestellt, und zwar innerhalb des Dichtungsabschnitts 15 bzw. innerhalb des Dichtkörpers 15. D.h., erst mit der Fertigstellung der Klappe 11 und/oder Dichtfläche 14 wird der Drosseldichtspalt 17 ausgebildet. Hierdurch werden separate Fertigungstoleranzen von Klappe 11 und Dichtungsabschnitt bzw. Dichtkörper 15 im Hinblick auf die Herstellungstoleranzen des Drosseldichtspalts 17 ausgeglichen.In order to be able to provide the throttle sealing gap 17 with a particularly high precision with regard to its geometry, it is preferably produced by producing and / or shaping the flap 11 and / or the sealing surface 14, namely within the sealing section 15 or within the sealing body 15 That is, only with the completion of the flap 11 and / or sealing surface 14 of the throttle sealing gap 17 is formed. As a result, separate manufacturing tolerances of the flap 11 and sealing section or sealing body 15 are balanced with respect to the manufacturing tolerances of the throttle sealing gap 17.

Bei einer bevorzugten Ausführungsform wird zunächst die Klappe 11 vorgefertigt, wobei die Klappe 11 insbesondere im Bereich ihrer Klappenkante 16 noch nicht ihre endgültige Form aufweist. Die insoweit unfertige Klappe 11 wird im Dichtungsabschnitt 15 bzw. im Dichtkörper 15 positioniert, und zwar in einer vorbestimmten Relativlage oder Solllage dazu. Hierbei sind Klappe 11 und Dichtungsabschnitt 15 bzw. Dichtkörper 15 so aufeinander abgestimmt, dass in diesem Ausgangszustand in radialer Richtung zwischen der Klappenkante 16 und der Dichtfläche 14 ein Abstand vorliegt, der gegenüber dem noch herzustellenden Drosseldichtspalt 17 bzw. gegenüber dessen Spaltweite verkleinert ist. Insbesondere kann die Klappenkante 16 zumindest bereichsweise die Dichtfläche 14 berühren und/oder überlappen. Unter Beibehaltung der Solllage zwischen Klappe 11 und Dichtungsabschnitt 15 bzw. Dichtkörper 15 wird nun durch Bearbeitung der Klappenkante 16 und/oder der Dichtfläche 14 der Drosseldichtspalt 17 hergestellt. Beispielsweise wird der Drosseldichtspalt 17 durch Beschneiden der Klappenkante 16 und/oder der Dichtfläche 14 freigeschnitten. Denkbar ist beispielsweise ein Laserschneidverfahren oder Wasserstrahlschneidverfahren.In a preferred embodiment, first the flap 11 is prefabricated, the flap 11, in particular in the region of its flap edge 16, not yet having its final shape. The extent unfinished flap 11 is positioned in the sealing portion 15 and in the sealing body 15, in a predetermined relative position or desired position to it. In this case, flap 11 and sealing section 15 or sealing body 15 are coordinated so that in this initial state in the radial direction between the flap edge 16 and the sealing surface 14 there is a distance which is reduced compared to the still to be produced throttle sealing gap 17 and against the gap width. In particular, the flap edge 16 at least partially the sealing surface 14 touch and / or overlap. While maintaining the desired position between the flap 11 and sealing portion 15 and sealing body 15 is now produced by processing the flap edge 16 and / or the sealing surface 14 of the throttle sealing gap 17. For example, the throttle sealing gap 17 is cut free by trimming the flap edge 16 and / or the sealing surface 14. For example, a laser cutting method or water jet cutting method is conceivable.

Bei einer anderen Ausführungsform kann die Klappe 11 beispielsweise durch Spritzgießen, insbesondere aus Kunststoff, hergestellt werden. Dabei kann die Dichtfläche 14 in einem Gießwerkzeug zum Spritzgießen der Klappe 11 einen Wandabschnitt bilden, der zur Begrenzung der Klappenkante 16 dient. Vorzugsweise lassen sich Gießparameter, wie Temperatur und Druck, und der Klappenwerkstoff so wählen, dass der Drosseldichtspalt 17 beim Erstarren des gespritzten Klappenwerkstoffs von selbst entsteht, und zwar durch Schwindung des erkaltenden Klappenwerkstoffs.In another embodiment, the flap 11 can be produced for example by injection molding, in particular made of plastic. In this case, the sealing surface 14 in a casting mold for injection molding of the flap 11 form a wall portion which serves to limit the flap edge 16. Preferably, casting parameters such as temperature and pressure, and the flap material can be selected so that the throttle sealing gap 17 is formed by the solidification of the molded flap material by itself, by shrinkage of the cooling flap material.

Alternativ kann auch die Dichtfläche 14 durch Spritzgießen hergestellt werden, wobei dann die Klappe 11 bzw. deren Klappenkante 16 in einem Gießwerkzeug zum Spritzgießen der Dichtfläche 14 einen Wandabschnitt bildet, der zur Begrenzung der Dichtfläche 14 dient. Auch hierbei lassen sich dann die Gießparameter und der verwendete Werkstoff so wählen, dass der Drosseldichtspalt 17 beim Erstarren von selbst entsteht.Alternatively, the sealing surface 14 can be produced by injection molding, in which case the flap 11 or its flap edge 16 in a casting mold for injection molding of the sealing surface 14 forms a wall section which serves to delimit the sealing surface 14. Again, then the casting parameters and the material used can be selected so that the throttle sealing gap 17 is formed by self-solidification.

Bei einer weiteren Variante kann die vorgefertigte, jedoch noch nicht endfertige Klappe 11 in einer vorbestimmten Relativlage oder Solllage im Dichtungsabschnitt 15 bzw. Dichtkörper 15 positioniert werden. Die unfertige Klappe 11 und der Dichtungsabschnitt 15 bzw. der Dichtkörper 15 sind dabei vorzugsweise so aufeinander abgestimmt, dass in diesem Ausgangszustand zwischen der Klappenkante 16 und der Dichtfläche 14 ein Abstand vorliegt, der gegenüber dem noch herzustellenden Drosseldichtspalt 17 bzw. dessen Spaltweite vergrößert ist. Die so positionierte Klappe 11 kann nun durch gezieltes Erwärmen und plastisches Verformen endgeformt werden, derart, dass sich der Klappenrand 16 in Richtung Dichtfläche 14 bewegt. Mit diesem Umformvorgang wird gleichzeitig der Drosseldichtspalt 17 ausgebildet. Ein derartiger Umformvorgang kann beispielsweise durch sogenanntes Heißpressen realisiert werden. Ebenso ist es möglich, die Erwärmung des zu verformenden Abschnitts mittels Ultraschall durchzuführen.In a further variant, the prefabricated, but not yet finished flap 11 can be positioned in a predetermined relative position or desired position in the sealing section 15 or sealing body 15. The unfinished flap 11 and the sealing section 15 or the sealing body 15 are preferably coordinated so that in this initial state between the flap edge 16 and the sealing surface 14 there is a distance which is increased compared to the yet yet to be manufactured throttle sealing gap 17 and its gap width. The thus-positioned flap 11 can now be finally shaped by targeted heating and plastic deformation, such that the flap edge 16 moves in the direction of the sealing surface 14. With this forming process, the throttle sealing gap 17 is formed simultaneously. Such a forming process can be realized for example by so-called hot pressing. It is also possible to carry out the heating of the portion to be deformed by means of ultrasound.

Desweiteren ist es grundsätzlich möglich, den Dichtkörper 15 so auszugestalten, dass er als Stanzwerkzeug zum Ausstanzen der Klappe 11 aus einem Bahnenmaterial verwendbar ist. Der Dichtkörper 15 weist dann eine entsprechende Schneidkante auf. Desweiteren besitzt der Dichtkörper 15 eine auf die Schneidkante folgende Querschnittserweiterung, die so dimensioniert ist, dass die mit dem Dichtkörper 15 ausgestanzte Klappe 11 im vorgesehen Dichtungsquerschnitt dann den gewünschten Drosseldichtspalt 17 gegenüber der Dichtfläche 14 automatisch ausbildet.Furthermore, it is in principle possible to design the sealing body 15 such that it can be used as a punching tool for punching out the flap 11 from a sheet material. The sealing body 15 then has a corresponding cutting edge. Furthermore, the sealing body 15 has a following on the cutting edge cross-sectional enlargement, which is dimensioned so that the stamped with the sealing body 15 flap 11 in the intended sealing cross-section then automatically forms the desired throttle sealing gap 17 relative to the sealing surface 14.

Darüber hinaus sind weitere Verfahren zur Herstellung bzw. Ausbildung des Drosseldichtspalts 17 denkbar. Beispielsweise ist der Einsatz schleifender Materialkombinationen möglich, bei denen sich ein harter schleifender Werkstoff in einen weichen schleifbaren Werkstoff einschleift, um so den Drosseldichtspalt auszubilden. Ein derartiges Verfahren ist beispielsweise in der bereits eingangs genannten EP 1 498 596 A2 offenbart, die hiermit durch ausdrückliche Bezugnahme zum Offenbarungsgehalt der vorliegenden Erfindung hinzugefügt wird.In addition, further methods for producing or forming the throttle sealing gap 17 are conceivable. For example, the use of abrasive material combinations is possible in which a hard abrasive material grinds into a soft, sandable material so as to form the throttle sealing gap. Such a method is for example in the already mentioned EP 1 498 596 A2 which is hereby incorporated by express reference to the disclosure of the present invention.

Wie dargestellt, kann die Ausbildung des Drosseldichtspalts 17 direkt innerhalb des Leitungsabschnitts 2 durchgeführt werden, sofern der Dichtungsabschnitt 15 einen integralen Bestandteil des Leitungsabschnitts 2 bildet. Für den bevorzugten Fall, dass der Dichtungsabschnitt 15 durch den bezüglich des Leitungsabschnitts 2 separierbaren Dichtkörper 15 gebildet ist, lässt sich der Drosseldichtspalt 17 separiert vom übrigen Leitungsabschnitt 2 innerhalb der Solllagenanordnung von Klappe 11 und Dichtkörper 15 herstellen. Dies kann im Hinblick auf die Zugänglichkeit der Klappenkante 16, der Dichtfläche 14 und/oder des Drosseldichtspalts 17 vorteilhaft sein.As shown, the formation of the throttle sealing gap 17 can be performed directly inside the conduit section 2, as long as the sealing section 15 forms an integral part of the conduit section 2. For the preferred case that the sealing portion 15 is formed by the relative to the line section 2 separable sealing body 15, the throttle sealing gap 17 can be separated from the remaining line section 2 within the desired position arrangement of flap 11 and sealing body 15 produce. This may be advantageous in view of the accessibility of the flap edge 16, the sealing surface 14 and / or the throttle sealing gap 17.

Nach dem Herstellen des Drosseldichtspalts 17 lassen sich die Klappe 11 und der Dichtkörper 15 am übrigen Schaltventil 1 anbauen. Wie gezeigt wird der Dichtkörper 15 vorzugsweise am Leitungsabschnitt 2 befestigt. Beispielsweise ist die Klappe 11 mit der Antriebswelle 12 verschraubt; ebenso sind andere Befestigungsmaßnahmen denkbar. Dementsprechend ist die Klappe 11 ein separat von der Antriebswelle 12 hergestelltes Bauteil und ist im montierten Zustand an diese angebaut.After producing the throttle sealing gap 17, the flap 11 and the sealing body 15 can be attached to the remaining switching valve 1. As shown, the sealing body 15 is preferably fastened to the conduit section 2. For example, the Flap 11 bolted to the drive shaft 12; as well as other fastening measures are conceivable. Accordingly, the flap 11 is a component manufactured separately from the drive shaft 12 and is mounted in the assembled state to this.

Um die hohe Qualität des Drosseldichtspalts 17 auch im montierten Zustand von Klappe 11 und Dichtkörper 15 gewährleisten zu können, kann bei einer bevorzugten Ausführungsform vorgesehen sein, einen strömungsführenden Innenquerschnitt des übrigen Leitungsabschnitts 2 zumindest in einem an den Dichtkörper 15 angrenzenden axialen Bereich, insbesondere geringfügig, mit einer Fase oder größer auszugestalten als der strömungsführende Innenquerschnitt des Dichtkörpers 15. Hierdurch lassen sich beispielsweise Kollisionen zwischen der Klappenkante 15 und dem übrigen Leitungsabschnitt 2 vermeiden.In order to ensure the high quality of the throttle sealing gap 17 in the assembled state of the flap 11 and sealing body 15 may be provided in a preferred embodiment, a flow-leading inner cross section of the remaining line section 2 at least in an adjacent to the sealing body 15 axial region, in particular slightly, be designed with a chamfer or larger than the flow-guiding inner cross section of the sealing body 15. In this way, for example, collisions between the flap edge 15 and the remaining line section 2 can be avoided.

Bei der hier gezeigten, bevorzugten Ausführungsform besitzt der Dichtkörper 15 eine vom Betrachter abgewandte axiale Stirnseite 19, vergleiche Fig. 2. Diese Stirnseite 19 ist vorzugsweise eben ausgestaltet und liegt in einer nicht näher bezeichnete Trennebene am Leitungsabschnitt 2 an. In besagter Trennebene liegt die Drehachse 13. In der Schließstellung liegt auch eine Mittelebene der Klappe 11 in der Trennebene. Der Leitungsabschnitt 2 besitzt zur Aufnahme des Dichtkörpers 15 eine entsprechende Aussparung 20, die eine zur Stirnseite 19 komplementäre Anlageseite 21 aufweist.In the preferred embodiment shown here, the sealing body 15 has an axial end face 19 facing away from the observer, cf. Fig. 2 , This end face 19 is preferably designed flat and is located in an unspecified parting line on the line section 2. In said parting plane, the axis of rotation is 13. In the closed position is also a median plane of the flap 11 in the parting plane. The line section 2 has for receiving the sealing body 15 has a corresponding recess 20 which has a side face 21 complementary to the end face 19.

Bemerkenswert ist bei der hier gezeigten Ausführungsform außerdem, dass am Dichtkörper 15 an einer nicht näher bezeichneten, dem Betrachter zugewandten, axialen Stirnseite radial außen eine in Umfangsrichtung umlaufende Stufe 22 ausgebildet ist, die im montierten Zustand gemäß Fig. 1 die Nut 7 radial innen und axial begrenzt. Die Nut 7 ist demnach nur radial außen von einer nicht näher bezeichneten Wandung der Aussparung 20 des Leitungsabschnitts 2 begrenzt. Die dem Betrachter zugewandte, axiale Stirnseite des Dichtkörpers 15 erstreckt sich vorzugsweise in einer Ebene, insbesondere in derselben Ebene wie die dem Betrachter zugewandte Flanschseite 4 des Leitungsabschnitts 2.It is also noteworthy in the embodiment shown here that on the sealing body 15 at an unspecified, facing the viewer, the axial end face radially outside a circumferentially circumferential step 22 is formed in accordance with the assembled state Fig. 1 the groove 7 radially inwardly and axially limited. The groove 7 is therefore limited only radially outside of a wall not designated in detail of the recess 20 of the line section 2. The observer facing, axial end face of the sealing body 15 preferably extends in a plane, in particular in the same plane as the side facing the viewer flange 4 of the line section. 2

Am Leitungsabschnitt 2 ist in einem vom Stellantrieb 3 entfernten Bereich ein Lagerabschnitt 23 angeformt, in dem ein vom Stellantrieb 3 entferntes Ende der Antriebswelle 12 drehbar gelagert ist. Der Lagerabschnitt 23 ist vergleichsweise steif ausgestaltet, um relativ hohe Momente bezüglich der Drehachse 13 aufnehmen zu können, ohne dass es hierbei zu einer signifikante Verformung des Leitungsabschnitt 2 kommt. Der Lagerabschnitt 23 trägt eine Halterung 24, die beispielsweise mittels Schrauben 25 am Lagerabschnitt 23 fixiert ist. Die Halterung 24 dient zur Drehsicherung eines Torsionsfederstabs 26, der sich koaxial zur Drehachse 13 erstreckt. Der Torsionsfederstab 26 erstreckt sich koaxial innerhalb der Antriebswelle 12, die hierzu als Hohlwelle ausgebildet ist. Die Antriebswelle 12 ist an einem vom Lagerabschnitt 23 entfernten Bereich drehfest mit dem Torsionsfederstab 26 verbunden. Der Torsionsfederstab 26 besitzt seine Neutrallage mittig zwischen der Schließstellung und der Offenstellung der Klappe 11 und dient als Rückstelleinrichtung für den Stellantrieb 3. Der Torsionsfederstab 26 stellt in jeder Endlage des Stellantriebs 3, also in der Schließstellung und in der Offenstellung der Klappe 11 potentielle Energie bereit, die zu Beginn jeder Umschaltphase eine starke Beschleunigung der Klappe 11 ermöglicht.On the line section 2, a bearing section 23 is formed in a remote from the actuator 3 area, in which a remote from the actuator 3 end of the drive shaft 12 is rotatably mounted. The bearing section 23 is configured comparatively stiff in order to be able to take up relatively high torques with respect to the rotation axis 13, without this leading to significant deformation of the line section 2. The bearing portion 23 carries a holder 24, which is fixed for example by means of screws 25 on the bearing portion 23. The holder 24 serves to prevent rotation of a torsion spring rod 26 which extends coaxially to the axis of rotation 13. The torsion spring rod 26 extends coaxially within the drive shaft 12, which is designed for this purpose as a hollow shaft. The drive shaft 12 is rotatably connected to the torsion bar 26 at a remote from the bearing portion 23 area. The torsion bar 26 has its Neutral position centered between the closed position and the open position of the flap 11 and serves as a return device for the actuator 3. The torsion bar 26 provides in each end position of the actuator 3, ie in the closed position and in the open position of the flap 11 potential energy at the beginning of each Shift phase allows a strong acceleration of the flap 11.

Claims (11)

  1. A method for manufacturing a switching valve (1) for controlling a gas flow in a gas line of an internal combustion engine, in particular in a motor vehicle,
    - whereby the switching valve (1) has a line section (2) for installation in the gas line and an actuator drive (3) for rotational adjustment of a flap (11) about an axis of rotation (13) running across the direction of flow inside the line section (2), whereby in a closed position of the flap (11) a throttle sealing gap (17) is formed radially between a flap edge (16) and a sealing surface (14) of a sealing section (15) which faces and encompasses the flap (11) along the flap edge (16) in the circumferential direction,
    - whereby the throttle sealing gap (17) is manufactured by manufacturing and/or shaping and machining the flap (11) and/or the sealing surface (14) within the sealing section (15),
    - whereby a sealing body (15) forming the sealing section is manufactured separately from the remaining line section (2) and is added on to the line section (2) only after manufacturing the throttle sealing gap (15).
  2. The method according to Claim 1,
    characterized in that
    - the flap (11) is positioned in a predetermined relative position in the sealing section (15) after its manufacture, whereby the flap (11) and the sealing section (15) are coordinated with one another so that there is a reduced distance radially between the flap edge (16) and the sealing surface (14) in this starting state with respect to the throttle sealing gap (17),
    - the throttle sealing gap (17) is manufactured by machining the flap edge (16) and/or the sealing surface (14) with the flap (11) in position.
  3. The method according to Claim 1,
    characterized in that
    - the flap (11) is manufactured by injection molding, whereby the sealing surface (14) functions as a wall section in a casting mold for bordering the flap edge (16), whereby the casting parameters and the material of the flap (11) are selected so that the throttle sealing gap (17) is formed by shrinkage in solidification of the flap material,
    - the sealing surface (14) is manufactured by injection molding, whereby the flap edge (16) functions as a wall section in a casting mold to border the sealing surface (14), whereby the casting parameters and the material of the sealing surface (14) are selected so that the throttle sealing gap (17) is formed by shrinkage on solidification of the sealing surface material.
  4. The method according to Claim 1,
    characterized in that
    - the flap (11) is positioned in a predetermined relative position in the sealing section (15) after its manufacture, whereby the flap(11) and the sealing section (15) are coordinated with one another so that in this starting state, an enlarged distance prevails radially between the flap edge (16) and the sealing surface (14) with respect to the throttle sealing gap (17),
    - the throttle sealing gap (17) is produced by heating and plastic deformation of the positioned valve (11).
  5. The method according to any one of claims 1 through 4,
    characterized in that
    the sealing body (15) is designed so that it can be used for punching out the flap (11) from sheeting material.
  6. A switching valve for controlling a gas flow in a gas line of an internal combustion engine, in particular in a motor vehicle,
    - having an actuator drive (3) for rotational adjustment of a flap (11) about an axis of rotation (13) running across the direction of flow inside a line section (2),
    - whereby a throttle sealing gap (17) is formed in a closed position of the butterfly valve (11) radially between a flap edge (16) and a sealing surface (14) of the sealing section that faces the flap (11) and encompasses the flap (11) along the flap edge (16) in the circumferential direction,
    - whereby the sealing section is formed by a sealing body (15) manufactured separately from the remaining line section (2),
    characterized in that
    - the line section (2) is designed for installation in the gas line,
    - the sealing body (15) is fixedly added directly onto the line section (2).
  7. The switching valve according to Claim 6,
    characterized in that
    the sealing body (15) is in contact with the line section (2) on a plane or axial end face (19) in a dividing plane in which the axis of rotation (13) is situated.
  8. The switching valve according to Claim 6 or 7,
    characterized in that
    - the actuator drive (3) has a housing (8),
    - at least a portion (9) of the housing (8) is integrally designed on the line section (2).
  9. The switching valve according to any one of Claims 6 through 8,
    characterized in that
    - the line section (2) has an axially open groove (7) running in a closed form in the circumferential direction to receive an axial gasket, and/or
    - the groove (7) is formed and/or bordered on the inside radially and axially on the flange side (4) that receives the sealing body (15), formed by a step (22) on the sealing body (15), and/or
    - at least one of the flange sides (4) is designed to be planar.
  10. The switching valve according to any one of Claims 7 through 9,
    characterized in that
    - the flap (11) is a component manufactured separately from a drive shaft (12) of the actuator drive (3) extending coaxially with the axis of rotation (13) in the line section (2), and/or
    - the flap (11) is added on to the drive shaft (12).
  11. The switching valve according to any one of Claims 7 through 10,
    characterized in that
    - the throttle sealing gap (17) is manufactured by machining the flap edge (16) and/or the sealing surface (14), or
    - the throttle sealing gap (17) is formed by shrinkage of the flap (11) integrally molded up to the sealing surface (14), or
    - the throttle sealing gap (17) is produced by heating and plastic deformation of the flap (11) with radial expansion (16).
EP20060126373 2006-02-24 2006-12-18 Switching valve and method of manufacturing the same Expired - Fee Related EP1826375B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200610009155 DE102006009155A1 (en) 2006-02-24 2006-02-24 Switching valve and associated manufacturing method

Publications (2)

Publication Number Publication Date
EP1826375A1 EP1826375A1 (en) 2007-08-29
EP1826375B1 true EP1826375B1 (en) 2014-02-26

Family

ID=38181116

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20060126373 Expired - Fee Related EP1826375B1 (en) 2006-02-24 2006-12-18 Switching valve and method of manufacturing the same

Country Status (3)

Country Link
US (1) US7637278B2 (en)
EP (1) EP1826375B1 (en)
DE (1) DE102006009155A1 (en)

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Publication number Priority date Publication date Assignee Title
DE102007025176A1 (en) * 2007-05-29 2008-12-04 Mahle International Gmbh switching valve
DE102008020142B3 (en) * 2008-04-22 2009-10-01 Ktm Sportmotorcycle Ag Combustion air supply device
DE102008020136A1 (en) * 2008-04-22 2009-10-29 Ktm-Sportmotorcycle Ag Combustion air supply device
DE102008063604A1 (en) * 2008-12-18 2010-06-24 Mahle International Gmbh Valve device and internal combustion engine system
DE202013101999U1 (en) * 2013-05-08 2014-08-12 Walter Söhner GmbH & Co. KG Throttle device with low leakage rate

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DE4329526A1 (en) * 1993-09-02 1995-03-09 Mann & Hummel Filter Throttle device
US5794591A (en) * 1997-03-17 1998-08-18 Ford Motor Company Throttle valve for an internal combustion engine
US5902426A (en) * 1997-08-27 1999-05-11 Siemens Canada Limited Process for manufacturing an air flow valve
DE19848440A1 (en) * 1998-10-21 2000-04-27 Mann & Hummel Filter Injection molded valve flap for valve mechanism has compensation for shrinkage provided by elastic flap edge
DE19918777A1 (en) * 1999-04-24 2000-10-26 Mann & Hummel Filter Flap valve arrangement as throttles in intake channels in IC engines has power transmission shaft connecting flap valve wings, and injection-molded valve modules
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Also Published As

Publication number Publication date
US7637278B2 (en) 2009-12-29
US20070200080A1 (en) 2007-08-30
DE102006009155A1 (en) 2007-08-30
EP1826375A1 (en) 2007-08-29

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