EP1466082B1 - Galet suiveur couplable ou element de support couplable d'un entrainement de soupape dans un moteur a combustion interne - Google Patents

Galet suiveur couplable ou element de support couplable d'un entrainement de soupape dans un moteur a combustion interne Download PDF

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Publication number
EP1466082B1
EP1466082B1 EP03729438A EP03729438A EP1466082B1 EP 1466082 B1 EP1466082 B1 EP 1466082B1 EP 03729438 A EP03729438 A EP 03729438A EP 03729438 A EP03729438 A EP 03729438A EP 1466082 B1 EP1466082 B1 EP 1466082B1
Authority
EP
European Patent Office
Prior art keywords
coupling
coupling means
opening
cam follower
support element
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 - Lifetime
Application number
EP03729438A
Other languages
German (de)
English (en)
Other versions
EP1466082A1 (fr
Inventor
Walter Speil
Henning Karbstein
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.)
IHO Holding GmbH 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 EP1466082A1 publication Critical patent/EP1466082A1/fr
Application granted granted Critical
Publication of EP1466082B1 publication Critical patent/EP1466082B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
    • 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
    • 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
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction

Definitions

  • the invention relates to a switchable cam follower or a switchable support member of a valve train of an internal combustion engine, with an outer part, which is assembled with a cam in this direction relatively movable inner part, wherein the inner part at its separation gap to Au- vanteil two spaced apart or opposite openings for Coupling medium has, which openings in a Nockengrund Vietnamese to a further opening for the coupling medium in the outer part are aligned, wherein the coupling means are designed and arranged such that when coupling one on a coupling side the separating gap so engages over that it simultaneously in the opening of the outer and inner part runs.
  • Such a cam follower shown here as a turn-off rocker arm, goes out of the class considered as generic US 6,321,705 B1 out.
  • the disadvantage of this is that on both coupling sides a relatively high production cost must be operated. So both coupling sides must be made extremely accurate with respect to the radial clearance (free travel of the coupling means in its opening in Nockenhubides) and a play tolerance. Likewise, only the slightest form deviations are permitted. Also, it is not clear immediately upon reaching the coupling status on a coupling side which radial clearance then prevails on this side.
  • There is a switchable cam follower which is constructed relatively complex. The double accuracy increases the system risk on the coupling sides.
  • the object of the invention is therefore to provide a cam follower or a support element of the aforementioned type, in which the cited disadvantages are eliminated and in particular in its coupling region simpler and cheaper to produce, at the same time secure coupling.
  • the coupling is thus designed so that always first the coupling means of the other, fine toleranced coupling side in the corresponding opening and that only on this side at the same time a small radial coupling play exists.
  • cam position for the displacement of the coupling means a base circle contact of the or the associated cam is provided.
  • other lifting positions are also conceivable.
  • the scope of the invention relates in particular to switchable cam followers such as the aforementioned bucket tappet, but also on roller or mushroom tappets for acting on pushrods, on lever-like cam followers, on switching bridges for acting on a plurality of gas exchange valves of equivalent action and on switchable support elements, provided that a two-sided coupling mechanism is used ,
  • the scope of the invention relates to switchable valve train members in which a slider packet is not rectified moves, but in which two similar coupling means are applied, for example, in the inner part, and be displaced radially outward beyond the separating gap for the coupling purpose.
  • a further advantageous embodiment of the invention relates to the fact that the openings are formed as a bore and the coupling means as a piston-like slide.
  • the openings are also conceivable, such as polygonal ones, whereby a variety of coupling means in place of the slides will also be apparent to the person skilled in the art at this point.
  • wedges, balls and the like are also used. thought.
  • the openings in the outer part of the coupling medium are preferably diametrically opposite. However, provision is also made for a circumferential or height direction staggered positioning of this. It is also possible not to make the opening in the inner part as a through hole, but to apply blind holes.
  • the cam follower 1 as disclosed in both figures, consists of a cylindrical outer part 2, in the bore 3 a for this purpose axially movable inner part 4 is installed. Between the inner and the outer part 4, 2 extends an annular separation gap 5.
  • the inner part 4 has two diametrically opposite openings 6, 7, which are connected to a through hole. Both openings 6, 7 have an edge 8, 9.
  • the edges 8, 9 is in a cam position (here base circle run) depending on a further opening 10, 11 for later to be explained coupling means in alignment.
  • the opening 10 on a coupling side 12 has no coupling agent in the decoupling state, whereas is positioned in the opening 11 on another coupling side 13 designed as a piston-like slider coupling means 14.
  • a sleeve-like body 19 is installed within the bore 20, the coupling means 15 extends directly.
  • the opening 11 on the other coupling side 13 for the coupling means 14 also has a sleeve-like body 21, within which bore 22, the coupling medium 14 extends directly.
  • the edge 9 on the sleeve-like body 19 encloses, with sufficient coupling movement of the coupling means 14 in the opening 7, annular and thus all-embracing the coupling means 14.
  • this advantage is not given; however, as will be explained below, this can easily be accepted.
  • a radial play or a tolerance of the radial play of the coupling means 14 on the other coupling side 13 may be precisely designed, whereas a radial clearance or, a play tolerance for the coupling means 15 on the one coupling side 12 is roughly designed.
  • the shape deviation can be designed as mentioned above.
  • the coarser interpretation of the radial clearance on the one coupling side 12 causes in coupling only a slightly higher tilting of the outer to the inner part 2, 4.
  • the radial clearance is determined by the other, fine-tolerant coupling side 13.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Transmission Devices (AREA)

Claims (6)

  1. Galet suiveur couplable (1) ou élément de support couplable d'un entraînement de soupape dans un moteur à combustion interne, avec une partie extérieure (2) qui est assemblée à une partie intérieure (4) mobile par rapport à elle dans la direction de levée de la came, dans lequel la partie intérieure (4) possède à sa fente de séparation (5) avec la partie extérieure (2) deux ouvertures (6,7) mutuellement distantes ou en vis-à-vis pour des moyens d'accouplement (14, 15), ouvertures (6, 7) qui, dans une position de cercle de base de la came, sont respectivement alignées avec une autre ouverture (10, 11) pour les moyens d'accouplement (14, 15) dans la partie extérieure (2), dans lequel les moyens d'accouplement (14, 15) sont conçus et disposés de telle sorte que, lors de l'accouplement, chacun d'entre eux recouvre sur un côté d'accouplement (12, 13) la fente de séparation (5) de telle sorte qu'il s'étend en même temps dans l'ouverture (10, 6) de la partie extérieure (2) et de la partie intérieure (4), dans lequel d'une part, dans une position de désaccouplement des moyens d'accouplement (14, 15), une course à vide axiale du moyen d'accouplement (15) sur l'un des côtés d'accouplement (12) jusqu'à l'accouplement est grande et une course à vide axiale du moyen d'accouplement (14) sur l'autre côté d'accouplement (13) jusqu'à l'accouplement est petite, et dans lequel d'autre part un jeu radial, seul ou conjointement avec une tolérance de jeu radial, du moyen d'accouplement (15) sur l'un des côtés d'accouplement (12) est grand par rapport à son ouverture (10) et un jeu radial, seul ou conjointement avec une tolérance de jeu radial, du moyen d'accouplement (14) sur l'autre côté d'accouplement (13) est petit par rapport à son ouverture (7).
  2. Galet suiveur ou élément de support selon la revendication 1, dans lequel les ouvertures (6, 7, 10, 11) sont réalisées sous forme de perçages et les moyens d'accouplement (15, 14) sous forme de tiroirs du genre pistons.
  3. Galet suiveur ou élément de support selon la revendication 2, dans lequel, dans les ouvertures (11, 6 et 7) dans lesquelles s'étendent les moyens d'accouplement (14, 15) en cas de désaccouplement, sont installés des corps (21, 19) du genre douilles à l'intérieur des perçages (22, 20) desquels sont directement disposés les moyens d'accouplement (14, 15).
  4. Galet suiveur ou élément de support selon la revendication 2, dans lequel la partie extérieure (2) est réalisée annulaire et dans lequel la partie intérieure (4) s'étend dans son perçage (3).
  5. Galet suiveur ou élément de support selon la revendication 4, dans lequel seul un bord (9) de l'ouverture (7) pour le moyen d'accouplement (14) sur l'autre côté d'accouplement (13), ouverture (7) dans laquelle pénètre le moyen d'accouplement (14) lors de l'accouplement, est réalisé sous forme de surface plane.
  6. Galet suiveur ou élément de support selon l'une quelconque des revendications précédentes, dans lequel on utilise un ensemble de tiroir constitué d'un total de deux moyens d'accouplement (14, 15), dans lequel les ouvertures (6, 7) dans la partie intérieure (4) sont réunies en un perçage traversant à l'intérieur duquel le premier moyen d'accouplement (15) s'étend au moins quasiment sur toute sa longueur, dans lequel l'autre moyen d'accouplement (14) est installé dans l'ouverture (11) de l'autre côté d'accouplement (13) et possède radialement à l'intérieur un côté frontal convexe (17) comme surface de contact pour une surface frontale (16) sur le premier moyen d'accouplement (15) dans la partie intérieure (4), et dans lequel le côté frontal (17) s'applique contre la surface frontale (16) en cas de désaccouplement pendant la première position de la came.
EP03729438A 2002-01-18 2003-01-10 Galet suiveur couplable ou element de support couplable d'un entrainement de soupape dans un moteur a combustion interne Expired - Lifetime EP1466082B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10201805A DE10201805A1 (de) 2002-01-18 2002-01-18 Schaltbarer Nockenfolger oder schaltbares Abstützelement eines Ventiltriebs einer Brennkraftmaschine
DE10201805 2002-01-18
PCT/EP2003/000158 WO2003060294A1 (fr) 2002-01-18 2003-01-10 Galet suiveur couplable ou element de support couplable d'un entrainement de soupape dans un moteur a combustion interne

Publications (2)

Publication Number Publication Date
EP1466082A1 EP1466082A1 (fr) 2004-10-13
EP1466082B1 true EP1466082B1 (fr) 2008-03-05

Family

ID=7712484

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03729438A Expired - Lifetime EP1466082B1 (fr) 2002-01-18 2003-01-10 Galet suiveur couplable ou element de support couplable d'un entrainement de soupape dans un moteur a combustion interne

Country Status (6)

Country Link
US (1) US7059287B2 (fr)
EP (1) EP1466082B1 (fr)
AT (1) ATE388307T1 (fr)
AU (1) AU2003235625A1 (fr)
DE (2) DE10201805A1 (fr)
WO (1) WO2003060294A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004043182A1 (de) * 2004-09-07 2006-03-30 Ina-Schaeffler Kg Schaltbarer Schlepphebel
NL2002667C2 (nl) * 2009-03-25 2010-09-28 Bolidt Mij Tot Exploitatie Van Kunststoffen En Bouwwerken B V Railingelement en werkwijze voor het vervaardigen daarvan.
US20120137995A1 (en) * 2010-12-01 2012-06-07 Kia Motors Corporation Direct acting variable valve lift apparatus

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52110313A (en) * 1976-03-12 1977-09-16 Toyota Motor Corp Suction/exhaust valve operation mechanism for internal-combustion engi ne
CA1323533C (fr) * 1987-12-28 1993-10-26 Toshihiro Oikawa Systeme de soupapes pour moteurs a combustion interne
DE19608651A1 (de) * 1996-03-06 1997-09-11 Schaeffler Waelzlager Kg Ventiltrieb für Gaswechselventile von Brennkraftmaschinen
DE19728100B4 (de) * 1997-07-02 2005-11-10 Ina-Schaeffler Kg Schaltbarer Stößel für einen Ventiltrieb einer Brennkraftmaschine
DE19801701A1 (de) 1998-01-17 1999-07-22 Porsche Ag Ventiltrieb einer Brennkraftmaschine
DE19801603A1 (de) * 1998-01-17 1999-07-22 Schaeffler Waelzlager Ohg Auf unterschiedliche Hübe für wenigstens ein Gaswechselventil schaltbarer Nockenfolger eines Ventiltriebs einer Brennkraftmaschine
DE19913290A1 (de) * 1999-03-24 2000-09-28 Schaeffler Waelzlager Ohg Schaltbarer Nockenfolger
US6321705B1 (en) 1999-10-15 2001-11-27 Delphi Technologies, Inc. Roller finger follower for valve deactivation
DE10102130A1 (de) * 2001-01-18 2002-07-25 Ina Schaeffler Kg Schaltbarer Nockenfolger
DE10119366A1 (de) 2001-04-20 2002-10-24 Ina Schaeffler Kg Hydrauliksystem einer Brennkraftmaschine

Also Published As

Publication number Publication date
WO2003060294A1 (fr) 2003-07-24
DE10201805A1 (de) 2003-07-31
US7059287B2 (en) 2006-06-13
AU2003235625A1 (en) 2003-07-30
DE50309312D1 (de) 2008-04-17
EP1466082A1 (fr) 2004-10-13
US20050028776A1 (en) 2005-02-10
ATE388307T1 (de) 2008-03-15

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