EP0733783A1 - Ensemble de culbuteur - Google Patents

Ensemble de culbuteur Download PDF

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Publication number
EP0733783A1
EP0733783A1 EP96101130A EP96101130A EP0733783A1 EP 0733783 A1 EP0733783 A1 EP 0733783A1 EP 96101130 A EP96101130 A EP 96101130A EP 96101130 A EP96101130 A EP 96101130A EP 0733783 A1 EP0733783 A1 EP 0733783A1
Authority
EP
European Patent Office
Prior art keywords
rocker arm
valve
rocker
hydraulic
arrangement according
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
EP96101130A
Other languages
German (de)
English (en)
Other versions
EP0733783B1 (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 actuating a lift valve of an internal combustion engine with at least two rocker arms interacting with different cams, which can be coupled to one another, and is based on DE 43 20 902 C1.
  • the known rocker arm arrangement - this term should also include rocker arm or rocker arm arrangements - is fundamentally advantageous and suitable for actuating a globe valve with different stroke profiles, but in the known state of the art there is no possibility for a (stationary) valve clearance compensation, given in particular for hydraulic valve clearance compensation.
  • the object of the invention is therefore to demonstrate a particularly functionally reliable and simple construction, with the aid of which an automatic (stationary) valve lash adjuster can be implemented on a rocker arm arrangement according to the preamble of the main claim.
  • the rocker arms are mounted on an associated axle piece, which is in particular a hydraulic Valve clearance compensation element is supported.
  • Advantageous training and further education are included in the subclaims.
  • Fig. 1 shows a side view
  • Fig. 2 shows a top view with the omission of the two cams acting on the rocker arm
  • Fig. 3 shows the section A-A from Fig. 2.
  • the reference numeral 1 designates a normally arranged lift valve (for example intake valve) of an internal combustion engine.
  • This lift valve 1 can be opened by a rocker arm arrangement 2 consisting of two rocker arms 2a, 2b, while the closing movement of the lift valve 1 is initiated as usual by a valve closing spring 3.
  • the two rocker arms 2a, 2b are arranged side by side, as shown in particular in FIG. 2, the first rocker arm 2a being forked and virtually enclosing the second rocker arm 2b.
  • the first rocking lever 2a acts with its free end 4 directly on the free end of the stem of the lift valve 1.
  • a locking piston 5 is mounted in the free end 4 of the first rocking lever 2a, which can lie completely in the rocking lever 2a, but which, alternatively, can also be partially inserted into a receiving bore 7 provided in the end face of the second rocking lever 2b in a manner to be explained later, according to arrow direction 6 can be, whereby the two rocker arms 2a, 2b are then coupled to each other.
  • Each of the rocker arms 2a, 2b interacts with its own cam 8, 8 '.
  • Two first cams 8 roll on the contact surfaces of the first rocker arm 2a, which are designed as sliding blocks 9 and, taken on their own, cause a relatively small valve lift profile of the lift valve 1.
  • a second cam 8 ' on the other hand designed larger valve stroke course and arranged between the two first cams 8, acts on the second rocker arm 2b and for this purpose rolls on a roller 10 suitably attached to the rocker arm 2b. If the two rocker arms 2a, 2b are thus coupled to one another, then the lift valve 1 is actuated by the cam 8 ′ acting on the rocker arm 2b due to the larger lift valve lift profile. In the case of decoupling of the two rocker arms 2a, 2b, on the other hand, the lift valve 1 is actuated solely by the rocker arm 2a or by the cams 8 acting thereon.
  • Automatic valve lash compensation in particular hydraulic valve lash compensation, is to be implemented in a simple manner on the described rocker arm arrangement 2 for actuating a lift valve 1. If only a single rocker arm is provided, then an automatic valve lash adjuster is usually realized in that this single rocker arm of a lift valve is supported on a hydraulic valve lash adjuster element.
  • a single hydraulic valve lash adjuster 11 assigned to the lift valve 1 is provided.
  • this is designed as a plug-in element and is mounted in the cylinder head 12 of the internal combustion engine, which is only shown schematically.
  • the two rocker arms 2a, 2b are jointly supported on this hydraulic valve lash compensation element 11.
  • it carries an axle piece 13 on which the two rocker arms 2a, 2b are mounted with their ends facing away from the cams 8, 8 'and the lift valve 1.
  • 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 axle piece 13 or its longitudinal axis of symmetry forms the axis of rotation when these rocker arms 2a, 2b are deflected under the action of the rotating cams 8, 8 '.
  • a torsion leg spring 14 is provided for the second rocker arm 2b, which ensures permanent contact between the rocker arm 2b and the cam 8 'assigned to it guaranteed.
  • this torsion leg spring 14 is arranged essentially engaging on the rocking lever 2b opposite the cam 8 '.
  • the locking piston 5 is mounted in the free end 4 of the first rocker arm 2a.
  • a return spring 15 is provided which usually holds the locking piston 5 in the decoupled position, that is to say under the action of the return spring 15, the locking piston 5 is located completely within the free end 4 of the first rocker arm 2a, so that the two rocker arms 2a, 2b are decoupled from one another are. This state is shown in Fig. 1 for the lower half and in Fig. 2 for the upper half of the locking piston 5.
  • the locking piston 5 By acting on the end of the locking piston 5 facing away from the second rocking lever 2b with a suitable hydraulic medium under sufficiently high pressure, the locking piston 5 can now be partially pushed out of the free end 4 of the rocking lever 2a in the direction of arrow 6 and thereby get into the receiving bore 7 in the second rocking lever 2b , as shown in Fig. 1 for the upper half and in Fig. 2 for the lower half of the locking piston 5.
  • the hydraulic medium required for displacing the locking piston 5 is supplied to the side of the locking piston 5 facing away from the second rocker arm 2b through a hydraulic channel 16 which is located in the first rocker arm 2a.
  • the hydraulic medium is removed from a storage space, not shown, of the hydraulic valve lash compensation element 11, which is provided on this valve lash compensation element 11 as usual and is known to the person skilled in the art, via a channel bore provided in the receptacle 11 '.

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)
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
DE19510106 1995-03-20
DE19510106A DE19510106A1 (de) 1995-03-20 1995-03-20 Schwinghebel-Anordnung

Publications (2)

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

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0781900A1 (fr) * 1995-12-20 1997-07-02 Eaton Corporation Support pour culbuteur verrouillable
EP0814239A1 (fr) * 1996-06-17 1997-12-29 Eaton Corporation Dispositif de verrouillage pour système de commande de soupape
EP0908605A3 (fr) * 1997-10-09 1999-04-28 Volkswagen Aktiengesellschaft Commande de soupape pour moteurs à combustion interne pouvant être débrayée
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
EP1568859A1 (fr) * 2004-02-25 2005-08-31 Delphi Technologies, Inc. Dispositif de basculeur pour soupape
WO2007017027A1 (fr) * 2005-08-05 2007-02-15 Schaeffler Kg Levier entraine commutable d'un mecanisme de distribution d'un moteur a combustion interne
WO2007057769A3 (fr) * 2005-11-21 2007-10-04 Eaton Corp Mecanisme de verrouillage a bras culbuteur a double levage et agencement d’actionnement associe
WO2008098932A1 (fr) * 2007-02-13 2008-08-21 Mahle International Gmbh Système d'entraînement par came
US7878168B2 (en) 2007-02-16 2011-02-01 GM Global Technology Operations LLC High performance overhead valvetrain assembly

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Citations (5)

* 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
WO1980000094A1 (fr) * 1978-06-14 1980-01-24 Eaton Corp Mecanisme de comme ameliore d'une soupape de moteur
GB2199894A (en) * 1987-01-08 1988-07-20 Honda Motor Co Ltd I.c. engine rocker valve gear
EP0416628A1 (fr) * 1989-09-08 1991-03-13 Nissan Motor Co., Ltd. Disposition de culbuteurs pour système de commande de soupapes variable
US5189998A (en) * 1991-07-23 1993-03-02 Atsugi Unisia Corporation Valve mechanism of internal combustion engine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2753197A1 (de) * 1976-12-15 1978-06-22 Eaton Corp Ventilsteuervorrichtung
US4768467A (en) * 1986-01-23 1988-09-06 Fuji Jukogyo Kabushiki Kaisha Valve operating system for an automotive 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
GB9003603D0 (en) * 1990-02-16 1990-04-11 Lotus Group Plc Cam mechanisms
US5445116A (en) * 1992-12-22 1995-08-29 Unisia Jecs Corporation Hydraulic variable lift engine valve gear

Patent Citations (5)

* 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
WO1980000094A1 (fr) * 1978-06-14 1980-01-24 Eaton Corp Mecanisme de comme ameliore d'une soupape de moteur
GB2199894A (en) * 1987-01-08 1988-07-20 Honda Motor Co Ltd I.c. engine rocker valve gear
EP0416628A1 (fr) * 1989-09-08 1991-03-13 Nissan Motor Co., Ltd. Disposition de culbuteurs pour système de commande de soupapes variable
US5189998A (en) * 1991-07-23 1993-03-02 Atsugi Unisia Corporation Valve mechanism of internal combustion engine

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0781900A1 (fr) * 1995-12-20 1997-07-02 Eaton Corporation Support pour culbuteur verrouillable
EP0814239A1 (fr) * 1996-06-17 1997-12-29 Eaton Corporation Dispositif de verrouillage pour système de commande de soupape
EP0908605A3 (fr) * 1997-10-09 1999-04-28 Volkswagen Aktiengesellschaft Commande de soupape pour moteurs à combustion interne pouvant être débrayée
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
US6708660B2 (en) 2002-06-15 2004-03-23 Ina-Schaeffler Kg Finger lever of a valve train of an internal combustion engine
EP1568859A1 (fr) * 2004-02-25 2005-08-31 Delphi Technologies, Inc. Dispositif de basculeur pour soupape
WO2007017027A1 (fr) * 2005-08-05 2007-02-15 Schaeffler Kg Levier entraine commutable d'un mecanisme de distribution d'un moteur a combustion interne
US7712443B2 (en) 2005-08-05 2010-05-11 Schaeffler Kg Switchable cam follower of a valve train of an internal combustion engine
CN101238274B (zh) * 2005-08-05 2010-11-03 谢夫勒科技有限两合公司 内燃机阀动装置的可转换牵引杆
WO2007057769A3 (fr) * 2005-11-21 2007-10-04 Eaton Corp Mecanisme de verrouillage a bras culbuteur a double levage et agencement d’actionnement associe
US7484487B2 (en) 2005-11-21 2009-02-03 Eaton Corporation Dual lift rocker arm latch mechanism and actuation arrangement therefor
WO2008098932A1 (fr) * 2007-02-13 2008-08-21 Mahle International Gmbh Système d'entraînement par came
US7878168B2 (en) 2007-02-16 2011-02-01 GM Global Technology Operations LLC High performance overhead valvetrain assembly

Also Published As

Publication number Publication date
DE59609114D1 (de) 2002-05-29
EP0733783B1 (fr) 2002-04-24
DE19510106A1 (de) 1996-09-26

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