EP2132419A1 - Élément de distribution couplable - Google Patents

Élément de distribution couplable

Info

Publication number
EP2132419A1
EP2132419A1 EP08717684A EP08717684A EP2132419A1 EP 2132419 A1 EP2132419 A1 EP 2132419A1 EP 08717684 A EP08717684 A EP 08717684A EP 08717684 A EP08717684 A EP 08717684A EP 2132419 A1 EP2132419 A1 EP 2132419A1
Authority
EP
European Patent Office
Prior art keywords
bore
coupling
housing
coupling piston
valve drive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP08717684A
Other languages
German (de)
English (en)
Other versions
EP2132419B1 (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 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 KG filed Critical Schaeffler 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

Links

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 drive part, with a hollow cylindrical housing, in whose bore a relatively axially movable inner element extends with its outer jacket, wherein one of the components [inner element or housing] at least one bore with at least one in the decoupling case extending coupling piston is immanent which bore leads in the direction of the other component and leads 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 acted upon in the Ausschiebeoplasty each other away.
  • valve train part designed here as a bucket tappet
  • Its coupling mechanism is located directly 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 region, since guide bores for the coupling piston are applied below the annular bottom.
  • 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 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 (large 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 formation with a flattening for a face-to-face contact with the corresponding counter surface of the sickle-like formation, must be secured against rotation with respect to their bore
  • the coupling pistons can also be secured against rotation by a pin projecting into their radial bore.
  • the inner part thin-walled / pipe-like form, the radial bore with the coupling piston is part of a simple crosspiece.
  • Figure 1 shows a longitudinal section through a tappet as a switchable valve drive part
  • Figure 2 shows a cross section along the section line A-A of Figure 1 and
  • Figure 3 is rotated by 90 ° relative to Figure 1
  • the valve train 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, a projection 23 is gone.
  • 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 ckentitle, so that the switchable valve train part 1 is present as a shutdown.
  • 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.
  • Figure 1 discloses the coupling state of the valve train part 1, in which the coupling piston 7, partially extended radially outwardly, 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 axial end of a sickle-like material release 14 against which the respective flattening 13 of the coupling piston 7 rests 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 Figure 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 via a shirt side shaped in the element 25 riser 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.
  • a ring channel 32 is formed radially in front of the Materialokostel- 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)
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 true EP2132419A1 (fr) 2009-12-16
EP2132419B1 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)

Families Citing this family (3)

* 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
US11339688B2 (en) 2020-01-29 2022-05-24 Borgwarner, Inc. Variable camshaft timing valve assembly

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2983991A (en) * 1956-02-23 1961-05-16 Chrysler Corp Valve tappet and method of making
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
DE19844202A1 (de) * 1998-09-26 2000-03-30 Schaeffler Waelzlager Ohg Schaltbarer Nockenfolger
US6321704B1 (en) * 1999-02-23 2001-11-27 Eaton Corporation Hydraulically actuated latching valve deactivation
DE19915532B4 (de) * 1999-04-07 2009-05-20 Schaeffler Kg Schaltbares Ventiltriebsglied
US7263956B2 (en) * 1999-07-01 2007-09-04 Delphi Technologies, Inc. Valve lifter assembly for selectively deactivating a cylinder
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
AU2002358742A1 (en) 2002-02-06 2003-09-02 Ina-Schaeffler Kg Switching element for a valve gear of an internal combustion engine
DE102005020580B4 (de) * 2005-05-03 2017-06-14 Schaeffler Technologies AG & Co. KG Schaltbarer Nockenfolger

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2008122477A1 *

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
EP2132419B1 (fr) 2010-08-11
WO2008122477A8 (fr) 2009-12-03
KR20100015364A (ko) 2010-02-12
ATE477402T1 (de) 2010-08-15
DE102007016739A1 (de) 2008-10-09

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