EP1826375B1 - Soupape de commutation et son procédé de fabrication - Google Patents

Soupape de commutation et son procédé de fabrication 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
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German (de)
English (en)
Other versions
EP1826375A1 (fr
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
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Mahle International 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 Mahle International GmbH filed Critical Mahle International GmbH
Publication of EP1826375A1 publication Critical patent/EP1826375A1/fr
Application granted granted Critical
Publication of EP1826375B1 publication Critical patent/EP1826375B1/fr
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)

Claims (11)

  1. Procédé de fabrication d'une soupape de commutation (1) pour commander un écoulement de gaz dans une conduite de gaz d'un moteur à combustion interne, notamment dans un véhicule automobile,
    - dans lequel la soupape de commutation (1) présente une portion de conduite (1) à monter dans la conduite de gaz et une servocommande (3) à des fins de réglage rotatif d'un clapet (11) autour d'un axe de rotation (13) s'étendant à l'intérieur de la portion de conduite (2) transversalement à la direction d'écoulement, dans lequel dans une position de fermeture du clapet (11) radialement entre une arête de clapet (16) et une surface d'étanchéité (14) tournée vers le clapet (11) d'une portion d'étanchéité (15) bordant dans la direction circonférentielle le clapet (11) le long de l'arête de clapet (16), un jeu d'étanchéité à étranglement (17) est réalisée,
    - dans lequel le jeu d'étanchéité à étranglement (17) est produit par fabrication et/ou usinage par façonnage du clapet (11) et/ou de la surface d'étanchéité (14) à l'intérieur de la portion d'étanchéité (15),
    - dans lequel un corps d'étanchéité (15) formant la portion d'étanchéité est fabriqué séparément du reste de la portion de conduite (2) et est monté sur la portion de conduite (2) seulement après la production du jeu d'étanchéité à étranglement (17).
  2. Procédé selon la revendication 1, caractérisé en ce que
    - le clapet (11) après sa fabrication est positionné dans la portion d'étanchéité (15) dans une position relative prédéterminée, dans lequel le clapet (11) et la portion d'étanchéité (15) sont harmonisés l'un par rapport à l'autre de telle sorte que, dans cet état de départ, un espacement rétréci par rapport au jeu d'étanchéité à étranglement (17) soit présent dans la direction radiale entre l'arête de clapet (16) et la surface d'étanchéité (14),
    - le jeu d'étanchéité à étranglement (17) est produit quand le clapet (11) est positionné par usinage de l'arête de clapet (16) et/ou de la surface d'étanchéité (14).
  3. Procédé selon la revendication 1, caractérisé en ce que
    - le clapet (11) est fabriqué par moulage par injection, dans lequel la surface d'étanchéité (14) sert dans un outil de moulage de portion de paroi pour délimiter l'arête de clapet (16), dans lequel les paramètres de moulage et le matériau du clapet (11) sont sélectionnés de telle sorte que le jeu d'étanchéité à étranglement (17) soit généré par retrait lors de la solidification du matériau de clapet,
    - la surface d'étanchéité (14) est fabriquée par moulage par injection, dans lequel l'arête de clapet (14) sert dans un outil de moulage de portion de paroi pour délimiter la surface d'étanchéité (14), dans lequel les paramètres de moulage et le matériau de la surface d'étanchéité (14) sont sélectionnés de telle sorte que le jeu d'étanchéité à étranglement (17) soit généré par retrait lors de la solidification du matériau de surface d'étanchéité.
  4. Procédé selon la revendication 1, caractérisé en ce que
    - le clapet (1) après sa fabrication est positionné dans la portion d'étanchéité (15) dans une position relative prédéterminée, dans lequel le clapet (11) et la portion d'étanchéité (15) sont harmonisés l'un à l'autre de telle sorte que, dans cet état de départ, un espacement agrandi par rapport au jeu d'étanchéité à étranglement (17) soit présent dans la direction radiale entre l'arête de clapet (16) et la surface d'étanchéité (14),
    - le jeu d'étanchéité à étranglement (17) est fabriqué par chauffage et déformation plastique du clapet positionné (11).
  5. Procédé selon une des revendications 1 à 4, caractérisé en ce que le corps d'étanchéité (15) est conçu de telle sorte qu'il puisse être utilisé pour découper à l'emporte-pièce le clapet (11) dans un matériau en bande.
  6. Soupape de commutation pour commander un écoulement de gaz dans une conduite de gaz d'un moteur à combustion interne, notamment dans un véhicule automobile,
    - comportant une servocommande (3) à des fins de réglage rotatif d'un clapet (11) autour d'un axe de rotation (13) s'étendant transversalement à la direction d'écoulement à l'intérieur d'une portion de conduite (2),
    - dans laquelle dans une position de fermeture du clapet (11) un jeu d'étanchéité à étranglement (17) est réalisé radialement entre une arête de clapet (16) et une surface d'étanchéité (14) tournée vers le clapet (11) d'une portion d'étanchéité bordant le clapet (11) dans la direction circonférentielle le long de l'arête de clapet (16),
    - dans lequel la portion d'étanchéité est formée par un corps d'étanchéité (15) fabriqué séparément du reste de la portion de conduite (2),
    caractérisé en ce que
    - la portion de conduite (2) est conçue afin d'être montée dans la conduite de gaz,
    - le corps d'étanchéité (15) est monté solidement directement sur la portion de conduite (2).
  7. Soupape de commutation selon la revendication 6, caractérisée en ce que le corps d'étanchéité (15) vient reposer par un côté avant (19) axial, plat dans un plan de séparation, dans lequel l'axe de rotation (13) est situé.
  8. Soupape de commutation selon les revendications 6 ou 7, caractérisée en ce que
    - la servocommande (3) présente un logement (8),
    - au moins une partie (9) du logement (8) est réalisée en un seul tenant sur la portion de conduite (2).
  9. Soupape de commutation selon une des revendications 6 à 8, caractérisée en ce que
    - la portion de conduite (2) présente sur chaque côté de bride axial (4) une rainure (7) ouverte axialement, faisant un tour fermé dans la direction circonférentielle pour recevoir un joint d'étanchéité axial, et/ou
    - sur le côté de bride (4) renfermant le corps d'étanchéité (15), la rainure (7) est formée et/ou délimitée radialement à l'intérieur et axialement par un gradin (22) réalisé sur le corps d'étanchéité (15), et/ou
    - au moins un des côtés de bride (4) a une configuration plate.
  10. Soupape de commutation selon une des revendications 7 à 9, caractérisé e, ce que
    - le clapet (11) est un composant fabriqué séparément d'un arbre d'entraînement (12) de la servocommande (3) s'étendant coaxialement à l'axe de rotation (13) dans la portion de conduite (2), et/ou
    - le clapet (11) est monté sur l'arbre d'entraînement (12).
  11. Soupape de commutation selon une des revendications 7 à 10, caractérisée en ce que
    - le jeu d'étanchéité à étranglement (17à) est fabriqué par usinage de l'arête de clapet (16) et/ou de la surface d'étanchéité (14), ou
    - le jeu d'étanchéité à étranglement (17) est formé par retrait du clapet (11) moulé par injection jusque sur la surface d'étanchéité (14),
    - le jeu d'étanchéité à étranglement (17) est fabriqué par chauffage et déformation plastique du clapet (11 avec dilatation radiale (16).
EP20060126373 2006-02-24 2006-12-18 Soupape de commutation et son procédé de fabrication Expired - Fee Related EP1826375B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200610009155 DE102006009155A1 (de) 2006-02-24 2006-02-24 Schaltventil und zugehöriges Herstellungsverfahren

Publications (2)

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

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US (1) US7637278B2 (fr)
EP (1) EP1826375B1 (fr)
DE (1) DE102006009155A1 (fr)

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DE102008063604A1 (de) * 2008-12-18 2010-06-24 Mahle International Gmbh Ventileinrichtung und Brennkraftmaschinensystem
DE202013101999U1 (de) * 2013-05-08 2014-08-12 Walter Söhner GmbH & Co. KG Drosselvorrichtung mit geringer Leckluftrate

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DE10226594A1 (de) * 2002-06-14 2004-01-08 Robert Bosch Gmbh Regelklappe mit eingespritzter Welle
EP1498596B1 (fr) * 2003-07-17 2006-10-18 Arno Hofmann Joint d'étanchéité à fente étrangleur pour soupapes
JP4269899B2 (ja) * 2003-11-07 2009-05-27 株式会社デンソー 内燃機関用スロットル装置の射出成形方法
US7047936B2 (en) * 2003-11-25 2006-05-23 Aisan Kogyo Kabushiki Kaisha Throttle bodies and methods of manufacturing such throttle bodies
DE102004003464A1 (de) * 2004-01-22 2005-08-11 Robert Bosch Gmbh Verfahren zur Herstellung einer Drosselklappen-Einheit mit erhöhter Dichtheit

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US20070200080A1 (en) 2007-08-30
US7637278B2 (en) 2009-12-29
DE102006009155A1 (de) 2007-08-30
EP1826375A1 (fr) 2007-08-29

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