EP0733783B1 - Ensemble de culbuteur pour actionnement d'une soupape - Google Patents

Ensemble de culbuteur pour actionnement d'une soupape Download PDF

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Publication number
EP0733783B1
EP0733783B1 EP96101130A EP96101130A EP0733783B1 EP 0733783 B1 EP0733783 B1 EP 0733783B1 EP 96101130 A EP96101130 A EP 96101130A EP 96101130 A EP96101130 A EP 96101130A EP 0733783 B1 EP0733783 B1 EP 0733783B1
Authority
EP
European Patent Office
Prior art keywords
rocking lever
valve
cam
axis
rocker arm
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
EP96101130A
Other languages
German (de)
English (en)
Other versions
EP0733783A1 (fr
Inventor
Albert Hörl-Liegl
Gerhard Walther
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP0733783A1 publication Critical patent/EP0733783A1/fr
Application granted granted Critical
Publication of EP0733783B1 publication Critical patent/EP0733783B1/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
    • 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
    • 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
    • F01L1/2405—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically by means of a hydraulic adjusting device located between the cylinder head and rocker arm

Definitions

  • the invention relates to a rocker arm arrangement for a switchable valve train an internal combustion engine, according to that mentioned in the preamble of claim 1 Type and is based on EP-A-0 416 628.
  • a disadvantage of this construction is an increased space requirement, since the common Axle piece clearly protrudes over the tilt axis.
  • WO-A-800 00 94 there is also a rocker arm arrangement for two with one another couplable rocker arms in connection with a valve lash adjuster described. Contrary to the arrangement in EP-A-0 416 628 these are designed for the operation of only one globe valve.
  • the second rocker arm is arranged in an opening of the first rocker arm and the common Axle piece is on the side facing the globe valve. On the, the side facing away from the lift valve is the first rocker arm on the valve lash adjuster supported.
  • the activation or deactivation of the second Rocker arm is carried out via a magnetic coil and a lever mechanism.
  • the object of the invention is therefore a particularly compact, reliable and simple construction to show with the help of a rocker arm assembly according to the preamble of the main claim an automatic (resting) Valve clearance compensation can be realized.
  • This object is achieved by the features in the characterizing part of claim 1 solved.
  • This arrangement has both rocker arms the same axis of rotation in one plane. This makes it simple and reliable Kinematic arrangement of the rocker arms realized in an advantageous manner can be built very small. In addition, this arrangement ensures the Another degree of freedom of the rocker arm in the direction of the axis of rotation.
  • FIG. 1 shows a side view
  • FIG. 2 shows a supervision with the omission of the two cams acting on the rocker arms
  • 3 shows section A-A from FIG. 2.
  • Lift valve for example intake valve
  • This globe valve can be opened 1 by a rocker arm arrangement 2, consisting of two rocker arms 2a, 2b during the closing movement of the lift valve 1 as usual by a valve closing spring 3 is initiated.
  • the two rocker arms 2a, 2b are arranged side by side, as in particular Fig. 2 shows, with the first rocker arm 2a forked is formed and quasi encloses the second rocker arm 2b.
  • the first rocker arm 2a acts with its free end 4 directly on the free end of the shaft of the Lift valve 1 on.
  • Each of the rocker arms 2a, 2b acts with its own Cams 8, 8 'together.
  • Two first cams 8 roll on the formed as sliding blocks 9 contact surfaces of the first Rocking lever 2a and call for themselves a relatively small valve lift curve of the lift valve 1 out.
  • a second cam 8 ' on the other hand designed larger valve stroke course and between the two first cams 8 is arranged, acts on the second rocker arm 2b and for this purpose rolls on an Swing lever 2b suitably fastened roller 10.
  • the aim of the described rocker arm arrangement is to be simple 2 for actuating a globe valve 1 automatic valve clearance compensation, in particular a hydraulic valve clearance compensation can be realized.
  • a hydraulic valve clearance compensation can be realized.
  • is only a single rocker arm is provided, so usually an automatic valve clearance compensation realized that this is the only rocker arm of a globe valve on a hydraulic Valve clearance compensation element is supported.
  • the axle piece 13 is in a preferred embodiment of the invention on the receptacle 11 'of the valve clearance compensation element 11 pressed on.
  • the rocker arm 2a, 2b forms the axis piece 13 or its longitudinal axis of symmetry doing the axis of rotation when this rocker arm 2a, 2b deflected under the action of the rotating cams 8, 8 ' become.
  • a torsion leg spring 14 is provided, which a permanent contact between the rocker arm 2b and the cam 8 'assigned to it.
  • this torsion leg spring 14 instead but also another suitable spring element can be used, essentially the cam 8 'arranged opposite to the rocking lever 2b.
  • the locking piston 5 is in the Free end 4 of the first rocker arm 2a mounted.
  • a return spring 15 is provided, which the locking piston 5 usually in the decoupled position holds, d. H. is under the force of the return spring 15 the locking piston 5 completely within of the free end 4 of the first rocker arm 2a, so that the two rocker arms 2a, 2b decoupled from each other are.
  • This state is in Fig. 1 for the lower half and in Fig. 2 for the upper half of the locking piston 5 shown.
  • the locking piston 5 can now Arrow direction 6 partially from the free end 4 of the Rocker arm 2a are pushed out and into the Get the mounting hole 7 in the second rocker arm 2b, as in Fig. 1 for the upper half and in Fig. 2 for the lower half of the locking piston 5 is shown. Then the two rocker arms 2a, 2b are together positively connected or coupled to each other.
  • Hydraulic medium is applied to the second rocker arm 2b opposite side of the locking piston 5 by a Hydraulic channel 16, which is located in the first rocker arm 2a, fed.
  • the hydraulic medium is removed a storage room of the hydraulic, not shown Valve clearance compensation element 11, but the this valve lash compensation element 11 is provided as usual and is known to the person skilled in the art via one in the recording 11 'provided channel bore.

Landscapes

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

Claims (5)

  1. Dispositif de culbuteurs (2) pour la commande commutée d'une soupape de moteur à combustion interne comprenant :
    un premier culbuteur (2a) et un second culbuteur (2b),
    une première came (8) et une seconde came (8'),
    un compensateur de jeu de soupapes (11),
    au moins une soupape (1), et dans lequel
    le premier culbuteur (2a) tournant autour d'un premier axe monté sur le compensateur de jeu de soupape (11), et
    le premier culbuteur (2a) s'appuie contre une soupape par son extrémité opposée au premier axe de rotation,
    le second culbuteur (2b) peut être couplé au premier culbuteur (2a) et
    le second culbuteur (2b) est monté en rotation autour d'un élément d'axe (13) commun au premier culbuteur (2a) et qui constitue un second axe de rotation parallèle au premier axe de rotation et
    la première came (8) agit avec un bossage de came différent de la seconde came (8'), dans le sens de l'ouverture de la soupape sur le premier culbuteur (2a) et la seconde came (8') agit dans le sens de l'ouverture de la soupape sur le second culbuteur (2b),
    caractérisé en ce que
    le second axe de rotation constitue dans l'élément d'axe (13) commun, l'unique axe de rotation des deux culbuteurs (2a, 2b) et
    le compensateur de jeu de soupapes (11) est un élément de compensation hydraulique de jeu de soupapes.
  2. Dispositif de culbuteurs selon revendication 1,
    caractérisé en ce que
    l'élément d'axe (13) est pressé sur le logement (11') du compensateur de jeu de soupapes (11).
  3. Dispositif de culbuteurs selon les revendications 1 ou 2 dans lequel un piston de verrouillage 5 qui assure le couplage est mobile contre la force d'un ressort, sous l'effet d'un fluide hydraulique fourni par le palier du culbuteur,
    caractérisé en ce que
    le liquide hydraulique est pris dans le réservoir du compensateur hydraulique de jeu de soupapes (11).
  4. Dispositif de culbuteurs selon l'une des revendications précédentes,
    caractérisé en ce que
    le côté du second culbuteur (2b) à l'opposé de la came (8') est soumis à l'action d'un élément élastique notamment en forme de ressort de torsion à branches (14).
  5. Dispositif de culbuteurs selon l'une des revendications précédentes,
    caractérisé en ce que
    le premier culbuteur (2a) a une forme de fourche et entoure le second culbuteur (2b).
EP96101130A 1995-03-20 1996-01-26 Ensemble de culbuteur pour actionnement d'une soupape Expired - Lifetime EP0733783B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19510106A DE19510106A1 (de) 1995-03-20 1995-03-20 Schwinghebel-Anordnung
DE19510106 1995-03-20

Publications (2)

Publication Number Publication Date
EP0733783A1 EP0733783A1 (fr) 1996-09-25
EP0733783B1 true EP0733783B1 (fr) 2002-04-24

Family

ID=7757197

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96101130A Expired - Lifetime EP0733783B1 (fr) 1995-03-20 1996-01-26 Ensemble de culbuteur pour actionnement d'une soupape

Country Status (2)

Country Link
EP (1) EP0733783B1 (fr)
DE (2) DE19510106A1 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5615647A (en) * 1995-03-28 1997-04-01 Eaton Corporation Latch assembly for a valve control system
US5584267A (en) * 1995-12-20 1996-12-17 Eaton Corporation Latchable rocker arm mounting
DE19744600A1 (de) * 1997-10-09 1999-04-15 Volkswagen Ag Abschaltbarer Ventiltrieb für Brennkraftmaschinen
DE10226821A1 (de) * 2002-06-15 2003-12-24 Ina Schaeffler Kg Schlepphebel eines Ventiltriebs einer Brennkraftmaschine
DE10226822A1 (de) * 2002-06-15 2004-01-08 Ina-Schaeffler Kg Schlepphebel eines Ventiltriebs einer Brennkraftmaschine
EP1568859B1 (fr) * 2004-02-25 2008-05-14 Delphi Technologies, Inc. Dispositif de basculeur pour soupape
DE102005037053A1 (de) * 2005-08-05 2007-02-08 Schaeffler Kg Schaltbarer Schlepphebel eines Ventiltriebs einer Brennkraftmaschine
US7484487B2 (en) 2005-11-21 2009-02-03 Eaton Corporation Dual lift rocker arm latch mechanism and actuation arrangement therefor
DE102006026393A1 (de) * 2006-06-07 2007-12-13 Schaeffler Kg Schaltbarer Schlepphebel eines Ventiltriebs einer Brennkraftmaschine
DE102006027805A1 (de) * 2006-06-16 2007-12-20 Schaeffler Kg Ventiltrieb einer Brennkraftmaschine mit wenigstens einem schaltbaren Schlepphebel
DE102006029178A1 (de) * 2006-06-24 2007-12-27 Bayerische Motoren Werke Ag Schlepphebel
DE102006031945A1 (de) * 2006-07-11 2008-01-24 Schaeffler Kg Schaltbarer Schlepphebel eines Ventiltriebs einer Brennkraftmaschine
DE102007007604A1 (de) * 2007-02-13 2008-08-14 Mahle International Gmbh Nockentrieb
US7878168B2 (en) 2007-02-16 2011-02-01 GM Global Technology Operations LLC High performance overhead valvetrain assembly

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2821178A (en) * 1954-09-22 1958-01-28 Daimler Benz Ag Valve control for internal combustion engines
DE2753197A1 (de) * 1976-12-15 1978-06-22 Eaton Corp Ventilsteuervorrichtung
US4203397A (en) * 1978-06-14 1980-05-20 Eaton Corporation Engine valve control mechanism
US4768467A (en) * 1986-01-23 1988-09-06 Fuji Jukogyo Kabushiki Kaisha Valve operating system for an automotive engine
GB2199894B (en) * 1987-01-08 1990-10-24 Honda Motor Co Ltd Valve operating device in internal combustion engine
JP2568855B2 (ja) * 1987-09-19 1997-01-08 マツダ株式会社 エンジンの動弁装置
JPH0396607A (ja) * 1989-09-08 1991-04-22 Nissan Motor Co Ltd エンジンの弁作動装置
GB9003603D0 (en) * 1990-02-16 1990-04-11 Lotus Group Plc Cam mechanisms
JP2944264B2 (ja) * 1991-07-23 1999-08-30 株式会社ユニシアジェックス 内燃機関の動弁装置
US5445116A (en) * 1992-12-22 1995-08-29 Unisia Jecs Corporation Hydraulic variable lift engine valve gear

Also Published As

Publication number Publication date
DE59609114D1 (de) 2002-05-29
DE19510106A1 (de) 1996-09-26
EP0733783A1 (fr) 1996-09-25

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