EP2132419B1 - Élément de distribution couplable - Google Patents

Élément de distribution couplable Download PDF

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Publication number
EP2132419B1
EP2132419B1 EP08717684A EP08717684A EP2132419B1 EP 2132419 B1 EP2132419 B1 EP 2132419B1 EP 08717684 A EP08717684 A EP 08717684A EP 08717684 A EP08717684 A EP 08717684A EP 2132419 B1 EP2132419 B1 EP 2132419B1
Authority
EP
European Patent Office
Prior art keywords
bore
coupling
drive part
valve
housing
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.)
Not-in-force
Application number
EP08717684A
Other languages
German (de)
English (en)
Other versions
EP2132419A1 (fr
Inventor
Calin Petru Itoafa
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.)
Schaeffler Technologies AG and Co KG
Original Assignee
Schaeffler Technologies AG and Co KG
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 Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Publication of EP2132419A1 publication Critical patent/EP2132419A1/fr
Application granted granted Critical
Publication of EP2132419B1 publication Critical patent/EP2132419B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/14—Tappets; Push rods
    • F01L1/143—Tappets; Push rods for use with overhead camshafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/14—Tappets; Push rods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/20—Adjusting or compensating clearance
    • F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
    • F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
    • F01L1/245—Hydraulic tappets
    • F01L1/25—Hydraulic tappets between cam and valve stem
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0005—Deactivating valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2307/00—Preventing the rotation of tappets

Definitions

  • the invention relates to a switchable valve train part, with a hollow cylindrical housing, in the bore of which a relatively axially movable inner element extends with its outer jacket, wherein one of the components [inner element or housing] is at least one bore with at least one decoupling case extending therein-coupling piston immanent which bore leads in the direction of the other component and opens to an annular surface between the components, which coupling piston for a coupling case in sections with a cam surface of the other component is engageable and wherein a lost-motion spring means is provided, which the components in their Ausschieberaum acted upon each other away.
  • valve train part designed here as a bucket tappet, goes out of the class considered as generic DE 44 92 633 C1 out. Its coupling mechanism is located immediately below the floor area.
  • the prior art ram is constructed relatively complicated and thus its production proves to be unnecessarily costly.
  • the outer part is not formed symmetrically in the bottom area, since below the annular bottom guide holes for the coupling piston are applied.
  • the inner part is unnecessarily massive and complicated. Due to the aforementioned massive design, the oscillating valve train masses are disadvantageously increased.
  • the piston coupling to be recognized leads to a relatively large surface pressure in the coupling region, it can also lead to unnecessary edge wear in the retraction of the coupling piston.
  • the object of the invention is therefore to provide a switchable valve train part of the aforementioned type, in which the cited disadvantages are eliminated by simple means.
  • this object is achieved in that the respective coupling piston, starting from the driver face facing end, is provided on one axial side with a section-wise flattening, wherein the other component, only in the peripheral portion of the adjacent bore with the coupling piston in a component in his Bore / is provided on its outer jacket, with a merely sickle-like material release, on which a flat Axialstirn the driver surface for engagement of the flattening of the coupling piston for the coupling case is shown and where on the one hand, the coupling piston against the bore and on the other hand, the components to each other with a respectful rotation are provided.
  • switchable valve train part in which the cited disadvantages are effectively eliminated.
  • the scope of the invention relates in particular to switchable valve train parts such as bucket tappets, but is not limited thereto.
  • switchable roller or flat tappets and switchable supporting elements are included in the scope of protection. All elements can be provided with hydraulic or mechanical clearance compensation.
  • the idea of the invention relates to solutions with at least one coupling piston, but preferably two diametrically opposed coupling pistons should be applied.
  • solutions are also conceivable and provided with a coupling piston number> 2 (star-shaped arrangement).
  • the coupling pistons can sit in the housing and be displaced radially inwardly into their respective sickle-like material release on the outer jacket of the inner part for the coupling case (larger cam lift).
  • the coupling piston in the inner part for example, in a radial bore, extend and be displaced for the coupling case radially outward in the adjacent sickle-like material release of the bore of the housing. It is expedient if the coupling pistons are provided with a flattening on their corresponding axial side (coupling region), but this is not a condition.
  • the proposed respective sickle-like Materialoko ein can be generated in the case of their training in the bore of the housing, for example, by a simple Scheibenfräsvorgang. Also conceivable, however, are other machining operations such as screwing or a non-cutting introduction such as embossing, extrusion or picking.
  • the switchable valve train part is designed as a detachable or reversible tappet.
  • a bore for the preferably two coupling piston is especially thought of a radial bore, which can be easily displayed in one operation. Conceivable and However, it is also provided to apply a blind hole o. The like. For each coupling piston.
  • the coupling pistons are preferably acted upon by compression spring force radially outwards (in the case of their arrangement in the inner part).
  • compression spring force radially outwards (in the case of their arrangement in the inner part).
  • the respective sickle-like material release weakens only slightly the wall thickness, so that it can be dispensed with necessary stiffening measures such as in a Ringnutkopplung in the prior art.
  • necessary stiffening measures such as in a Ringnutkopplung in the prior art.
  • the skilled artisan will recognize that due to the omission of the annular groove and shortened hydraulic fluid paths are present.
  • the coupling pistons in the case of their training with a flattening for a "face-to-face” contact with the corresponding mating surface of the sickle-like formation, against rotation must be secured against their bore.
  • the coupling piston can also be secured against rotation by a protruding into the radial bore pin.
  • the inner part thin-walled / pipe-like form, the radial bore with the coupling piston is part of a simple crosspiece.
  • the valve drive part 1 consists of a hollow cylindrical housing 2, which can be arranged in an oscillating manner via its thin-walled shirt 21 in a receptacle of the internal combustion engine.
  • the shirt 21 extends from an outer edge 20 of a ring-like bottom 19 in cam-distant direction. From an inner edge 22 of the bottom 19 is a projection 23 away.
  • This has a bore 3, in which a contrast axially movable, thin-walled / tubular-like inner element 4 is added.
  • the inner element 4 has no cam contact, so that the switchable valve drive part 1 is present as a shutdown element.
  • a bore 6 which is present here as a radial bore.
  • this bore 6 are located in the decoupling two coupling piston 7 diametrically opposite. These are urged radially outwards (coupling direction) via the force of a helical compression spring acting against their inner forehead 17 as spring means 18.
  • FIG. 1 discloses the coupling state of the valve train part 1, in which the coupling piston 7, partially extended radially outward, with a cam surface 9 in the bore 3 of the housing 2 are engaged.
  • This driver surface 9 is represented by an upper flat Axialstirn a sickle-like material release 14, against which the respective flattening 13 of the coupling piston 7 in the coupling case.
  • the material release 14 can be generated, for example, with a retractable into the bore 3 of the housing 2 simple disc milling cutter (see also FIG. 2 ).
  • the bore 3 of the housing 2 is part of the hollow-cylindrical projection 23 extending from the inner edge 22 of the bottom 19 of the housing 2 in the direction away from the cam.
  • the housing 2 has in its interior a largely fitting, thin-walled element 25 as a sheet metal part.
  • the hydraulic fluid is further directed through a shirt side formed in the element 25 riser channel 27 in the bottom direction.
  • the hydraulic fluid is further directed downwards via an axial channel 31, which runs between an outer jacket 30 of the attachment 23 and the region of the element 25 located there.
  • an annular channel 32 is formed radially in front of the Materialoko einen 14, which is in communication with the axial channel 31.
  • An annular surface 8 between the components 2, 4 is overlapped by a rotation lock 16. This sits in a recess 34 in the outer jacket 5 of the inner member 4 and is formed as a rolling element. Radially outward, the anti-rotation device 16 (rolling elements) engages in a corresponding longitudinal groove 35 of the bore 3 of the projection 23.
  • This is designed as a simple securing element as a snap ring which extends in an annular groove 36 on the outer jacket 5 of the inner member 4 and in the region of the coupling piston 7 lies on the flattened portions 13.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Multiple-Way Valves (AREA)
  • Valve Device For Special Equipments (AREA)
  • Water Treatment By Sorption (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Claims (8)

  1. Pièce de commande de soupape commutable (1), comprenant un boîtier cylindrique creux (2), dans l'alésage (3) duquel s'étend un élément interne (4) déplaçable axialement par rapport à celui-ci avec son enveloppe extérieure (5), au moins un alésage (6) avec au moins un piston de couplage (7) s'étendant à l'intérieur de celui-ci dans le cas d'un désaccouplement étant inhérent à l'un des composants [élément interne (4) ou boîtier (2)], lequel alésage (6) conduisant dans la direction de l'autre composant (2, 4) et débouchant au niveau d'une surface annulaire (8) entre les composants (4, 2), lequel piston de couplage (7) pouvant être amené en prise dans le cas d'un accouplement en partie avec une surface d'entraînement (9) de l'autre composant (2, 4) et un moyen de ressort à mouvement perdu (10) étant prévu, lequel sollicite les composants (4, 2) à l'écart l'un de l'autre dans leur direction de sortie, caractérisée en ce que le piston d'accouplement respectif (7), partant de sa face frontale (11) tournée vers la surface d'entraînement (9), est pourvu d'un méplat partiel (13) au niveau d'un côté axial (12), tandis que l'autre composant (2, 4), seulement dans la portion périphérique de l'alésage adjacent (6), avec le piston de couplage (7) dans l'un des composants (4, 2), dans son alésage (3) / sur son enveloppe extérieure (5), étant pourvu d'une partie exempte de matériau seulement en forme de croissant (14), sur l'une des faces frontales axiales plates de laquelle la surface d'entraînement (9) est constituée pour s'engager avec le méplat (13) du piston de couplage (7) dans le cas d'un accouplement, et d'une part le piston de couplage (7), par rapport à son alésage (6), et d'autre part les composants (4, 2), l'un par rapport à l'autre, étant pourvus d'une fixation en rotation (15, 16) respective.
  2. Pièce de commande de soupape selon la revendication 1, caractérisée en ce que l'on prévoit exactement deux pistons de couplage (7), qui s'étendent dans l'élément interne (4) dans l'alésage (6) réalisé sous forme d'alésage radial, et qui sont diamétralement opposés, les pistons de couplage (7) étant sollicités dans leur direction d'accouplement par le biais de la force d'un moyen de ressort (18), comme au moins un ressort de pression hélicoïdal, agissant contre ses faces frontales internes (17), leur déplacement dans la direction de désaccouplement étant effectué par le biais d'un moyen hydraulique pouvant être guidé devant ses faces frontales extérieures (11) dans la partie exempte de matériau en forme de croissant (14) respective.
  3. Pièce de commande de soupape selon la revendication 2, caractérisée en ce que l'on prévoit comme pièce de commande de soupape commutable (1) un poussoir à coupelle, avec le boîtier (2) présentant en tant que surface de contact de came un fond de type bague (19), lequel boîtier peut être guidé par le biais de sa chemise (21) saillant depuis le bord extérieur (20), dans un alésage d'un moteur à combustion interne, lequel fond (19) peut être mis en contact avec au moins une came à grande course, une saillie (23) cylindrique creuse dépassant depuis un bord interne (22) du fond (19), laquelle présente l'alésage (3) avec l'élément interne (4) guidé à l'intérieur, dans lequel alésage (3) sont appliquées les deux parties exemptes de matériau opposées en forme de croissant (14), sur les côtés supérieurs (24) desquelles s'étendent les faces frontales axiales plates sous forme de faces d'entraînement (9), et l'élément interne (4) étant réalisé du côté du fond soit sans contact avec la came soit avec un fond de type disque pour recevoir une came de faible course ou de course nulle.
  4. Pièce de commande de soupape selon la revendication 3, caractérisée en ce qu'à l'intérieur du boîtier (2) est appliqué un élément à paroi mince (25) tel qu'une pièce en tôle, qui suit essentiellement son contour intérieur, un canal de montée (27) pour le fluide hydraulique étant formé dans l'élément (25), à partir d'au moins un passage (26) dans la chemise (21) du boîtier (2), lequel canal de montée est en liaison par un ou plusieurs passages radiaux (28) entre un côté inférieur (29) du fond (19) et l'élément (25), au moins un canal axial (31) étant formé dans l'élément (25), sur l'enveloppe extérieure (30) de la saillie (23), lequel canal axial communique avec l'au moins un passage radial (28) et conduit dans la direction éloignée du fond, lequel canal axial (31) débouche dans un canal annulaire (32) ou canal de segment annulaire formé dans l'élément (25) à une hauteur avant les parties exemptes de matériau (14), depuis lequel un dépassement (33) respectif conduit à travers la saillie (23) jusqu'à la partie exempte de matériau (14) en forme de croissant respective.
  5. Pièce de commande de soupape selon la revendication 1, caractérisée en ce que la partie exempte de matériau en forme de croissant (14) avec la surface d'entraînement (9) est constituée par une opération de fraisage comme un fraisage à fraise-disque ou par nervurage / gaufrage, ou alésage au tour.
  6. Pièce de commande de soupape selon la revendication 1 ou 2, caractérisée en ce que l'on prévoit en tant que fixation en rotation (16) des composants (4, 2) l'un par rapport à l'autre, un corps comme une bille / une goupille, qui repose dans un évidement (34) dans l'enveloppe extérieure (5) de l'élément interne (4) ou de l'alésage (3) du boîtier (2), et qui, en venant en prise en partie par-dessus la surface annulaire (8), est guidée dans une rainure longitudinale (35) de l'alésage (3) du boîtier (2) ou de l'enveloppe extérieure (5) de l'élément interne (4).
  7. Pièce de commande de soupape selon la revendication 2, caractérisée en ce que l'on applique en tant que fixation en rotation (15) des deux pistons de couplage (7) par rapport à leur alésage (6) une pièce annulaire comme un jonc, qui est disposée concentriquement à l'axe de la pièce de commande de soupape (1), qui s'étend dans une rainure annulaire (36) sur l'enveloppe extérieure (5) de l'élément interne (4) et qui se situe dans la région du fond sur les méplats (13) des pistons de couplage (7).
  8. Pièce de commande de soupape selon la revendication 3, caractérisée en ce que l'élément interne (4) est réalisé essentiellement en forme de tube à paroi mince, l'alésage (6) traversant radialement pour les pistons de couplage (7) s'étendant dans une nervure transversale (38) divisant l'élément interne.
EP08717684A 2007-04-05 2008-03-12 Élément de distribution couplable Not-in-force EP2132419B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US91034707P 2007-04-05 2007-04-05
DE102007016739A DE102007016739A1 (de) 2007-04-07 2007-04-07 Schaltbares Ventiltriebsteil
PCT/EP2008/052938 WO2008122477A1 (fr) 2007-04-05 2008-03-12 Élément de distribution couplable

Publications (2)

Publication Number Publication Date
EP2132419A1 EP2132419A1 (fr) 2009-12-16
EP2132419B1 true EP2132419B1 (fr) 2010-08-11

Family

ID=39736266

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08717684A Not-in-force EP2132419B1 (fr) 2007-04-05 2008-03-12 Élément de distribution couplable

Country Status (6)

Country Link
EP (1) EP2132419B1 (fr)
KR (1) KR101465280B1 (fr)
CN (1) CN101680313A (fr)
AT (1) ATE477402T1 (fr)
DE (2) DE102007016739A1 (fr)
WO (1) WO2008122477A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11339688B2 (en) 2020-01-29 2022-05-24 Borgwarner, Inc. Variable camshaft timing valve assembly

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2652273B1 (fr) 2010-12-13 2016-09-21 Eaton Corporation Dispositif anti-rotation d'actionneur de pompe
USD701243S1 (en) 2011-12-13 2014-03-18 Eaton Corporation Pump actuator anti-rotation device

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US2963011A (en) * 1959-06-29 1960-12-06 Gen Motors Corp Valve lifter
DE4206166B4 (de) * 1991-03-14 2004-11-04 Volkswagen Ag Variabler Ventiltrieb für ein Hubventil einer Maschine
DE4225797C2 (de) * 1992-04-27 1995-01-05 Iav Motor Gmbh Ventiltrieb für Ladungswechselventile, vorzugsweise Einlaßventile, von Hubkolbenbrennkraftmaschinen
US5361733A (en) * 1993-01-28 1994-11-08 General Motors Corporation Compact valve lifters
GB9306221D0 (en) * 1993-03-25 1993-05-19 Lotus Car Valve control means
DE4314619A1 (de) 1993-05-04 1994-11-10 Schaeffler Waelzlager Kg Stößel
DE19804952A1 (de) * 1998-02-07 1999-08-12 Daimler Chrysler Ag Abschaltbarer Ventiltrieb für ein Gaswechselventil einer Brennkraftmaschine
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US6321704B1 (en) * 1999-02-23 2001-11-27 Eaton Corporation Hydraulically actuated latching valve deactivation
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WO2003067038A1 (fr) * 2002-02-06 2003-08-14 Ina-Schaeffler Kg Element de commutation pour un mecanisme de commande de soupapes d'un moteur a combustion interne
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DE102005020580B4 (de) * 2005-05-03 2017-06-14 Schaeffler Technologies AG & Co. KG Schaltbarer Nockenfolger

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11339688B2 (en) 2020-01-29 2022-05-24 Borgwarner, Inc. Variable camshaft timing valve assembly

Also Published As

Publication number Publication date
CN101680313A (zh) 2010-03-24
KR101465280B1 (ko) 2014-11-26
DE502008001125D1 (de) 2010-09-23
WO2008122477A1 (fr) 2008-10-16
WO2008122477A8 (fr) 2009-12-03
KR20100015364A (ko) 2010-02-12
ATE477402T1 (de) 2010-08-15
EP2132419A1 (fr) 2009-12-16
DE102007016739A1 (de) 2008-10-09

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