EP0634564B1 - Dispositif de désactivation de soupape de moteur à combustion interne - Google Patents

Dispositif de désactivation de soupape de moteur à combustion interne Download PDF

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Publication number
EP0634564B1
EP0634564B1 EP94106892A EP94106892A EP0634564B1 EP 0634564 B1 EP0634564 B1 EP 0634564B1 EP 94106892 A EP94106892 A EP 94106892A EP 94106892 A EP94106892 A EP 94106892A EP 0634564 B1 EP0634564 B1 EP 0634564B1
Authority
EP
European Patent Office
Prior art keywords
bearing pin
pin
locking
locking pin
internal combustion
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
EP94106892A
Other languages
German (de)
English (en)
Other versions
EP0634564A1 (fr
Inventor
Albert Hörl-Liegl
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 EP0634564A1 publication Critical patent/EP0634564A1/fr
Application granted granted Critical
Publication of EP0634564B1 publication Critical patent/EP0634564B1/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
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F01L1/185—Overhead end-pivot rocking arms
    • 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

Definitions

  • the invention relates to a device for decommissioning a lift valve actuated by a cam via a rocker arm of an internal combustion engine, with a bearing pin forming an abutment for the rocker arm, which is arranged longitudinally displaceably against a spring element, and with a locking pin for blocking the bearing pin.
  • a device of this type is shown for a rocker arm in DE 32 39 941 A1.
  • a device with which an individual lift valve of an internal combustion engine can be shut down individually, is convincing, but further improvements are desirable, which the present invention has set out to demonstrate.
  • the bearing pin and the locking pin are mounted in a housing insert, which in turn is supported by a play compensation element in the cylinder head of the internal combustion engine.
  • a device according to the invention for decommissioning an internal combustion engine lift valve is characterized in particular by a lash adjuster, preferably by a commercially available hydraulic lash adjuster. Time-consuming adjustment work or readjustment work for the desired valve clearance is no longer necessary.
  • play compensation elements have long been state of the art, but the invention proposes a particularly favorable arrangement. Accordingly, both the bearing pin forming the abutment for the rocker arm and its locking pin are mounted in a housing insert, which in turn is supported on the internal combustion engine cylinder head via the hydraulic play compensation element. Because of this arrangement, no additional elaborate guide elements are required for the integration of a play compensation element in a valve train according to the preamble of claim 1.
  • the reference number 1 denotes a globe valve which, as usual, is mounted with its valve guide 2 and a valve spring 3 and a spring plate 4 in the cylinder head 5 of the internal combustion engine.
  • a rocker arm 6 acts on the stem of the lift valve, which is designed here as a roller rocker arm and which in turn is actuated by a cam 7.
  • the rocker arm 6 With its end opposite the stem of the lift valve 1, the rocker arm 6 is supported on a bearing pin 8 from.
  • This bearing pin 8 is guided in a longitudinally displaceable manner in the direction of the arrow 9 in a housing insert 10, which is likewise mounted in the cylinder head 5 in a slightly longitudinally displaceable manner in the direction of the arrow 9.
  • the housing insert 10 is supported on a play-compensating element, designated in its entirety with 11, which is also mounted in the cylinder head, specifically in a blind hole 12.
  • the hydraulic play-compensating element 11 is a common component known to the person skilled in the art and is therefore of a construction and design its function not explained in detail.
  • a locking pin 13 is likewise mounted in the housing insert 10. This locking pin 13 is guided in a longitudinally displaceable manner in a transverse bore 14 in the housing insert 10 in the direction of the arrow 15 and can therefore also be in addition to the position shown, in which the locking pin is located in a side space 16 away from the bearing pin 8 assume a position below the bearing pin 8, as is shown only in dashed lines for the contour of the locking pin 13.
  • the lift valve 1 is actuated as usual, that is to say opened in the direction of the arrow 17, since through the locking pin 13 a displacement movement of the bearing pin 8 according to the direction of arrow 9 is excluded. If, on the other hand, the locking pin 13 is located completely within the side space 16, the bearing pin 8 is moved downward according to the direction of the arrow 9 instead of the lift valve 1 when the cam 7 rotates about its cam axis 7 ', so that the lift valve 1 is closed remains.
  • valve clearance compensation required in a modern valve train is taken over by a play compensation element 11, on which the housing insert 10 is supported in the cylinder head 5.
  • the required valve clearance is automatically maintained, as is known.
  • slight relative movements can also occur between the bearing pin 8 and the housing insert 10. If the locking pin 13 is located in the side space 16, the bearing pin 8 can be pushed slightly into the transverse bore 14 as part of these slight relative movements.
  • the end face 19 of the bearing pin 8 inclined relative to the direction of movement 15 of the locking pin 13 such that the clear width w between the end face 19 and the opposite housing insert wall 20 from the left edge of the bearing pin 8 or the transverse bore 14 facing away from the side space 16 to the right longitudinal edge facing the side space of the bearing pin 8 or to the side space 16 increases.
  • the end edges 21 of the bearing pin 13 are also beveled, even if the bearing pin 8 with its end face 19 protrudes slightly into the transverse bore 14 due to slight displacements of the housing insert 10 in the cylinder head 5, the locking pin 13 is always safe and can be reliably pushed out of the position shown to the left under the bearing pin 8 to block it.
  • this design also completely compensates for component tolerances and manufacturing tolerances.
  • the locking pin 13 is displaceable transversely to the bearing pin 8 over its entire end face 19, that is to say when the bearing pin 8 is blocked, the latter is supported with its substantially entire end face 19 on the locking pin 13, the mechanical stress on the components concerned is minimized or minimized as far as possible at least optimized.
  • the locking bolt 13 is actuated or moved hydraulically, into its rest position - in this rest position the cup-shaped locking bolt lies completely within the side space 16 against a rest stop, which is formed by a pin 22 - this locking bolt 13 is moved back by a tension spring 23 This tension spring 23 is arranged essentially within the cup-shaped locking bolt 13 and is hung on the bottom of the pin on the one hand and on the pin 22 on the other hand. If the locking pin 13 is thus to be shifted from the position shown to the left in the direction of arrow 15, the interior of the cup is subjected to a suitable hydraulic pressure. Because of the described beveling of the end face 19 and the end edges 21, the locking pin 13 can then slide completely under the bearing pin 8 and thus prevent a displacement of the same according to arrow direction 9.
  • the lift valve 1 is then actuated in accordance with the cam lift when the cam 7 is rotated. If, on the other hand, the hydraulic pressure acting on the locking pin 13 is withdrawn, this locking pin 13 slides back into its rest position due to the force of the tension spring 23 and completely reaches the side space 16 which, as already described, is delimited by the pin 22. As also already described, when the cam 7 rotates, the cam lift is carried out completely or at least essentially by the bearing pin 8 according to the direction of arrow 9, the lift valve 1 remains completely or at least essentially closed. A slight stroke of the lift valve 1 can, however, also be desirable and result from the fact that the possible displacement path of the bearing pin 8 is not sufficient for a complete implementation of the stroke of the cam 7.
  • a transverse pin 24 is mounted in the housing insert 10, which at least partially penetrates the bearing pin 8 in a longitudinal groove 25.
  • the longitudinal groove 25 is required to enable the bearing pin 8 to move in the direction of the arrow 9.
  • the transverse pin 24 also represents an end stop for the bearing pin 8 within the housing insert 10, so that the housing insert 10 including the bearing pin 8 and locking pin 13 can be installed as a pre-assembly unit in the cylinder head 5 and thereby automatically adjusts a valve drive without play .
  • This preassembly unit which of course also contains the compression spring 18 and the tension spring 23 on the other elements described in connection with the housing insert 10, is centered by the eccentric shoulder 26 in the blind hole 12 and thus also in the cylinder head 5.
  • the area of the housing insert 10 lying above the shoulder 26 and essentially receiving the locking pin 13 in the transverse bore 14 is of circular cylindrical design.
  • the housing insert 10 has a stop 27, which becomes effective when the play compensation element 11 is not active, on which the compression spring 18 is supported at the same time.
  • the distance between the stop 27 and the paragraph below it in the cylinder head 5 represents the working area of the play compensation element 11.
  • a hydraulic channel which conveys the hydraulic medium required for a movement of the locking pin 13 into the interior of this cup-shaped locking pin 13, is not shown.
  • This hydraulic pressure can be applied in a targeted manner by means of a suitable control valve, but quasi-automatic regulation is possible depending on the speed of the internal combustion engine and the lubricating oil pressure that increases almost proportionally, if the lubricating oil of the internal combustion engine is used as the hydraulic fluid actuating the locking pin 13. Since the device described should preferably be used on internal combustion engines which have a plurality of intake lift valves per cylinder, with at least one of these intake lift valves being able to be put out of operation, the automatic control mechanism described above via the oil pressure of the internal combustion engine corresponds exactly to the one then present Control requirements.

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)

Claims (2)

  1. Dispositif pour mettre hors service une soupape (1) d'un moteur à combustion interne, actionnée par une came (7) par l'intermédiaire d'un culbuteur (6), comprenant un goujon de palier (8) formant un appui pour le culbuteur (6) qui coulisse longitudinalement contre l'action d'un élément de ressort (18), ainsi qu'un goujon de blocage (13) pour bloquer le goujon de palier (8),
    caractérisé en ce que
    le goujon de palier (8) ainsi que le goujon de blocage (13) sont montés dans un insert de boîtier (10) lui-même monté dans la culasse (5) du moteur à combustion interne en s'appuyant sur un élément de compensation de jeu (11).
  2. Dispositif selon la revendication 1,
    caractérisé par au moins l'une des caractéristiques suivantes :
    - le goujon de blocage (13) est coulissant principalement transversalement au goujon de palier (8) et sur toute la surface frontale (19) de celui-ci,
    - la surface frontale (19) du goujon de palier (8) est inclinée par rapport à la direction de mouvement (15) du goujon de blocage (13) qui se trouve dans une cavité latérale (16) lorsqu'il ne bloque pas le goujon de palier, pour que la largeur libre (w) entre la face frontale (19) et la paroi opposée (20) de l'insert de boîtier augmente à partir de l'arête longitudinale du goujon de palier, tournée vers la chambre latérale, jusque vers l'arête longitudinale tournée vers la chambre latérale (16),
    - un goujon transversal (24), logé dans l'insert de boîtier (10) et traversant le goujon de palier (8) dans une rainure longitudinale (25), évite toute rotation du goujon de palier (8) autour de son axe longitudinal,
    - le goujon de blocage (13) en forme de gobelet est maintenu par un ressort de traction (23) accroché à une tige (22) formant une butée de repos pour le goujon de blocage, en étant maintenu dans une chambre latérale (16) et en pouvant coulisser hydrauliquement pour une opération de blocage, en agissant contre ce ressort de traction (23).
EP94106892A 1993-07-14 1994-05-03 Dispositif de désactivation de soupape de moteur à combustion interne Expired - Lifetime EP0634564B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4323555A DE4323555A1 (de) 1993-07-14 1993-07-14 Vorrichtung zum Außerbetriebsetzen eines Brennkraftmaschinen-Hubventils
DE4323555 1993-07-14

Publications (2)

Publication Number Publication Date
EP0634564A1 EP0634564A1 (fr) 1995-01-18
EP0634564B1 true EP0634564B1 (fr) 1996-10-30

Family

ID=6492770

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94106892A Expired - Lifetime EP0634564B1 (fr) 1993-07-14 1994-05-03 Dispositif de désactivation de soupape de moteur à combustion interne

Country Status (2)

Country Link
EP (1) EP0634564B1 (fr)
DE (2) DE4323555A1 (fr)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4442965A1 (de) * 1994-12-02 1996-06-05 Audi Ag Ventiltrieb mit mechanischer Verriegelung
DE19838926A1 (de) * 1998-08-27 2000-03-02 Schaeffler Waelzlager Ohg Schaltbarer Ventiltrieb einer Brennkraftmaschine
DE19838909A1 (de) * 1998-08-27 2000-03-02 Schaeffler Waelzlager Ohg Schaltbarer Ventiltrieb einer Brennkraftmaschine
DE19952909B4 (de) * 1999-11-03 2010-06-24 Schaeffler Kg Schaltbares Abstützelement
EP1143120A3 (fr) * 2000-03-08 2001-10-24 Eaton Corporation Dispositif de désactivation d'une soupape d'un moteur à combustion
DE10048619A1 (de) * 2000-09-30 2002-04-11 Ina Schaeffler Kg Abschaltbares Abstützelement
US6615783B2 (en) 2001-03-08 2003-09-09 Ina Schaeffler Kg Switchable tappet for the direct transmission of a cam lift to a tappet push rod
DE10111512A1 (de) * 2001-03-09 2002-09-12 Ina Schaeffler Kg Schaltbarer Stößel zur direkten Übertragung eines Nockenhubes auf eine Stößelstange
DE10122373B4 (de) * 2001-05-09 2014-09-18 Schaeffler Technologies Gmbh & Co. Kg Schaltbares Abstützelement
DE102005020586A1 (de) * 2005-05-03 2006-11-09 Bayerische Motoren Werke Ag Ventiltrieb für eine Brennkraftmaschine
DE102007033757A1 (de) 2007-07-18 2009-01-22 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Schaltelement für ein hydraulisches Ventilspielausgleichselement im Ventilsteuertrieb einer Brennkraftmaschine
FR2925574A3 (fr) * 2007-12-21 2009-06-26 Renault Sas Dispositif de commande d'une soupape d'un moteur a combustion interne
US8375909B2 (en) * 2009-01-30 2013-02-19 Eaton Corporation Rocker arm retention
US8573171B2 (en) 2009-08-04 2013-11-05 Eaton Srl Lost motion valve control apparatus
FR2969708B1 (fr) * 2010-12-22 2012-12-28 Valeo Sys Controle Moteur Sas Amelioration des dispositifs d'actionnement de soupape a possibilite de desactivation et moyens de verrouillage d'un tel dispositif.
DE102011005575A1 (de) 2011-03-15 2012-09-20 Schaeffler Technologies Gmbh & Co. Kg Ventiltrieb mit Zusatzhub im Nockengrundkreis
DE102017126702A1 (de) 2017-11-14 2019-05-16 Schaeffler Technologies AG & Co. KG Schaltbares Ventiltriebselement eines Ventiltriebes einer Brennkraftmaschine
CN112282886B (zh) * 2020-10-27 2022-04-08 一汽解放汽车有限公司 一种发动机停缸液压系统及车辆

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53115408A (en) * 1977-03-18 1978-10-07 Nissan Motor Co Ltd Control valve mechanism for internal combustion engines
JPS5799226A (en) * 1980-12-10 1982-06-19 Mitsubishi Motors Corp Valve operation stop mechanism
US4469061A (en) * 1982-07-08 1984-09-04 Honda Giken Kogyo Kabushiki Kaisha Valve actuating method for internal combustion engine with valve operation suspending function
DE3239941A1 (de) * 1982-10-28 1984-05-03 Volkswagenwerk Ag, 3180 Wolfsburg Vorrichtung zur abschaltung des ventiltriebes einer brennkraftmaschine
JPH0385309A (ja) * 1989-08-29 1991-04-10 Fuji Heavy Ind Ltd 弁作動停止装置
DE4211631A1 (de) * 1992-04-07 1993-04-08 Bayerische Motoren Werke Ag Ventiltrieb mit einem laengsverschiebbaren spielausgleichselement

Also Published As

Publication number Publication date
EP0634564A1 (fr) 1995-01-18
DE4323555A1 (de) 1995-01-19
DE59400932D1 (de) 1996-12-05

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