EP2668376B1 - Dispositif de commande variable de soupapes - Google Patents

Dispositif de commande variable de soupapes Download PDF

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Publication number
EP2668376B1
EP2668376B1 EP12700959.5A EP12700959A EP2668376B1 EP 2668376 B1 EP2668376 B1 EP 2668376B1 EP 12700959 A EP12700959 A EP 12700959A EP 2668376 B1 EP2668376 B1 EP 2668376B1
Authority
EP
European Patent Office
Prior art keywords
eccentric shaft
valve
controllable valve
train assembly
mechanically controllable
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.)
Active
Application number
EP12700959.5A
Other languages
German (de)
English (en)
Other versions
EP2668376A1 (fr
EP2668376B8 (fr
Inventor
Rudolf Flierl
Manfred Kloft
Paul Gnegel
Karsten Grimm
Martin Nowak
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.)
Volkswagen AG
Kolbenschmidt Pierburg Innovations GmbH
Original Assignee
Volkswagen AG
Kolbenschmidt Pierburg Innovations GmbH
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 Volkswagen AG, Kolbenschmidt Pierburg Innovations GmbH filed Critical Volkswagen AG
Publication of EP2668376A1 publication Critical patent/EP2668376A1/fr
Application granted granted Critical
Publication of EP2668376B1 publication Critical patent/EP2668376B1/fr
Publication of EP2668376B8 publication Critical patent/EP2668376B8/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • 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
    • 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
    • F01L13/0021—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 by modification of rocker arm ratio
    • 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
    • F01L13/0021—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 by modification of rocker arm ratio
    • F01L13/0026—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 by modification of rocker arm ratio by means of an eccentric
    • 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
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • 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
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L2001/0478—Torque pulse compensated 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
    • F01L13/0015—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
    • F01L13/0063—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 by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot
    • F01L2013/0068—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 by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot with an oscillating cam acting on the valve of the "BMW-Valvetronic" type
    • 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
    • F01L2800/00—Methods of operation using a variable valve timing mechanism
    • F01L2800/12—Fail safe operation

Definitions

  • FIG. 1 shows an embodiment of a valve train assembly 10 according to the invention with a plurality of gas exchange valves arranged in series 12, 14, 16, 18, 20, 22, 24 and 26.
  • two inlet gas exchange valves are assigned to a cylinder of the internal combustion engine.
  • the mechanically controllable valve drive arrangement 10 has four transmission arrangements 28, 29; 30, 31; 32, 33 and 34, 35, which in each case two gas exchange valves 12, 14; 16, 18; 20, 22; 24, 26 are assigned.
  • the transmission arrangements 28, 29; 30, 31; 32, 33; and 34, 35 stored in a known manner in the cylinder head by means of bearings.
  • the bearing means 36, 38 are in the present FIG.
  • each transmission arrangement 28, 29; 30, 31; 32, 33 and 34, 35 in known manner with a camshaft 40 in operative connection.
  • each transmission arrangement 28, 29; 30, 31; 32, 33 and 34, 35 by control peripheral surfaces 42, 43; 44, 45 (not visible here); 46, 47 and 48, 49 with corresponding adjusting a Ventilhubverstell sensible 41 such controlled that a lesser or higher valve lift of the intake valves 12, 14; 16, 18; 20, 22; 24, 26 is adjustable, this being accomplished by eccentric organs, which are provided on an eccentric shaft 50.
  • the eccentric shaft 50 is driven by a drive device 52 in the present case via a gear 53 designed as a gear 53.
  • eccentric shaft 50 It is designed in this embodiment as a push-through eccentric shaft, in which all possible contours of the eccentric organs are within a circle, which is formed by the outer diameter of an eccentric shaft bearing.
  • drive means 52 can be used both a forward and reverse rotary drive.
  • the eccentric shaft 50 can thus be driven in such a way that, depending on the present position, the valve stroke corresponding to the next operating state can be selected quickly and precisely by the use of the corresponding eccentric members (not shown). Even angles of rotation of> 360 ° can be realized.
  • a mechanically actuable valve drive 54 has the transmission arrangement 35 and the gas exchange valve 26.
  • the transfer assembly 35 consists of the pivot lever 56 and a rocker arm 58, wherein the pivot lever 56 engages with a working curve on the gas exchange valve 26 and the rocker arm 58 is in operative connection with the Ventilhubverstell noticed 41 and the camshaft 40.
  • the control circumferential surface 48 engages with an adjusting member of the valve lift adjusting device 41 against a biasing force of a spring 55 on a not further shown attack member (for example, a roller) of the rocker arm 58.
  • the rocker arm 58 engages with a working contour not shown on the pivot lever 56.
  • the respective rocker arm an off-center attacking Force exert on the eccentric shaft 50, which generates a torque that rotates the eccentric shaft 50 in a stable position in case of failure of the drive means 50, which causes a zero lift of the gas exchange valves and thus causes the failure of the internal combustion engine.
  • the eccentric shaft 50 at least one cam member 62 (see FIG.
  • cam member 62 may also be disposed over the eccentric shaft 50 via a single cam lobe. It may also be advantageous if the contour of the cam member 62 is within the circle formed by the outer diameter of the Exzenterwellenlagerung. This makes it possible to save the mounting step of attaching the cam member 62.
  • the plunger member 64 acts on the peripheral surface of the eccentric shaft 50 via a smooth contour or, for example, a roller.
  • a stable equilibrium position of the eccentric shaft 50 is set as a result of the interaction of cam member 62 and plunger member 64, wherein in each case a lift of the inlet valves is not equal to zero when actuated by the camshaft 40 is provided.
  • the cam member 62 is formed on the extension piece 63. It should be understood that the cam member 62 may also be formed on a single cam lobe. In this way, a position at one of the ends of the eccentric shaft 50 could be selected.
  • the cam member 62 is formed integrally with the eccentric shaft 50 and that the contour of the cam member 62 is within the circle formed by the outer diameter of an eccentric shaft bearing.
  • FIG. 3 shows an example of a schematic representation of the different position potentials of the eccentric shaft due to the acting moments at different eccentric shaft positions.
  • the curve 74 shows the positional potential of the eccentric shaft 50 due to the torque applied by the rocker arms.
  • the stable equilibrium position (characterized by the lowest position potential, here at the curve 74 it is equal to 0) is taken with a valve lift of 0, which leads to the mentioned problems.
  • the curve 78 shows the position potential due to the torque of the plunger member 64 in cooperation with the cam member 62.

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 (11)

  1. Entrainement de soupapes (10) à commande mécanique avec plusieurs soupapes d'échange de gaz (12, 14, 16, 18, 20, 22, 24, 26) rangées en série, auxquelles sont associés au moins deux cylindres rangés en série, au moins une soupape d'échange de gaz (12, 14, 16, 18, 20, 22, 24, 26) étant associée à un ensemble de transmission (28, 29; 30, 31; 32, 33; 34, 35), chaque ensemble de transmission (28, 29; 30, 31; 32, 33; 34, 35) étant supporté de manière mobile dans la tête de cylindre à l'aide de moyens de support (36, 38), et chaque ensemble de transmission (28, 29; 30, 31; 32, 33; 34, 35) étant lié fonctionnellement avec un moyen de réglage de la levée de soupape (41) et un arbre à cames (40), ledit moyen de réglage de la levée de soupape (41) comprenant un arbre d'excentrique (50) avec des surface périphérique de commande (42, 43; 44, 45; 46, 47; 48, 49) avec au moins un élément d'excentrique qui peut être entrainé par un moyen d'entrainement (52) de sorte que différentes positions de la levée de soupape peuvent être ajustées,
    caractérisé en ce que
    ledit arbre d'excentrique (50) comprend au moins un élément de came (62) qui, vu selon la direction longitudinale dudit arbre d'excentrique (50), est disposé hors des surfaces périphériques de commande (42, 43; 44, 45; 46, 47; 48, 49) et qui est lié fonctionnellement avec un élément de poussoir (64) chargé par ressort, ledit au moins un élément de came (62) étant disposé, vu selon la direction périphérique, au niveau des positions de levée nulle des surfaces périphériques de commande (42, 43; 44, 45; 46, 47; 48, 49).
  2. Entrainement de soupapes (10) à commande mécanique selon la revendication 1, caractérisé en ce que ledit élément de poussoir (64) agit sur la surface périphérique de l'arbre d'excentrique (50) par un rouleau.
  3. Entrainement de soupapes (10) à commande mécanique selon la revendication 1, caractérisé en ce que ledit élément de poussoir (64) agit sur la surface périphérique de l'arbre d'excentrique (50) par un palier à rouleau (72).
  4. Entrainement de soupapes (10) à commande mécanique selon l'une des revendications 1 - 3, caractérisé en ce que l'élément de came (62) est formé sur un embout de came disposé par liaison de forme et/ou liaison de force sur une des deux extrémités dudit arbre d'excentrique (50).
  5. Entrainement de soupapes (10) à commande mécanique selon l'une des revendications 1 - 4, caractérisé en ce que l'élément de poussoir (64) comprend une cage (68) dan laquelle est supporté un élément de ressort (66), de préférence un ressort hélicoïdal.
  6. Entrainement de soupapes (10) à commande mécanique selon l'une quelconque des revendications précédentes, caractérisé en ce que tous contours possibles des éléments d'excentrique sont situés au sein d'un cercle formé par les diamètres extérieurs d'un palier de l'arbre d'excentrique, ledit arbre d'excentrique (50) comprenant des surfaces de palier correspondantes.
  7. Entrainement de soupapes (10) à commande mécanique selon la revendication 6, caractérisé en ce que le moyen d'entrainement (52) entraine ledit arbre d'excentrique (50) par un élément de roue dentée (53), ledit élément de roue dentée (53) présentant une ouverture de passage pour ledit arbre d'excentrique (50) et est connecté avec la surface de palier par liaison de forme et/ou liaison de force.
  8. Entrainement de soupapes (10) à commande mécanique selon la revendication 7, caractérisé en ce que ledit élément de roue dentée (53) comprend un embout (63) sur lequel est formé ledit élément de came (62).
  9. Entrainement de soupapes (10) à commande mécanique selon la revendication 7, caractérisé en ce que des surfaces de butée sont prévues dans la tête de cylindre, sur lesquelles s'appui ledit élément de roue dentée (53) de part et d'autre dans la direction axiale.
  10. Entrainement de soupapes (10) à commande mécanique selon la revendication 7 ou 8, caractérisé en ce qu'aussi le contour dudit élément de came (62) est situé au sein du cercle formé par les diamètres extérieurs d'un palier de l'arbre d'excentrique.
  11. Entrainement de soupapes (10) à commande mécanique selon l'une quelconque des revendications précédentes, caractérisé en ce que chaque ensemble de transmission (28, 29; 30, 31; 32, 33; 34, 35) comprend au moins un levier basculant (56) et au moins un culbuteur (58), ledit levier basculant (56) agissant sur ladite soupape d'échange de gaz (12, 14, 16, 18, 20, 22, 24, 26) par une came de travail, et ledit culbuteur (58) étant lié fonctionnellement avec le moyen de réglage de la levée de soupape (41) et ledit arbre à cames (40) et engageant ledit levier basculant (56) par un contour de travail.
EP12700959.5A 2011-01-25 2012-01-13 Dispositif de commande variable de soupapes Active EP2668376B8 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011009417A DE102011009417A1 (de) 2011-01-25 2011-01-25 Mechanisch steuerbare Ventiltriebanordnung
PCT/EP2012/050473 WO2012100993A1 (fr) 2011-01-25 2012-01-13 Dispositif de commande de soupape à commande mécanique

Publications (3)

Publication Number Publication Date
EP2668376A1 EP2668376A1 (fr) 2013-12-04
EP2668376B1 true EP2668376B1 (fr) 2014-12-31
EP2668376B8 EP2668376B8 (fr) 2015-02-25

Family

ID=45529079

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12700959.5A Active EP2668376B8 (fr) 2011-01-25 2012-01-13 Dispositif de commande variable de soupapes

Country Status (7)

Country Link
US (1) US9074495B2 (fr)
EP (1) EP2668376B8 (fr)
JP (1) JP2014503750A (fr)
CN (1) CN103354860B (fr)
DE (1) DE102011009417A1 (fr)
ES (1) ES2532714T3 (fr)
WO (1) WO2012100993A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012204396A1 (de) * 2012-03-20 2013-09-26 Man Diesel & Turbo Se Ventiltrieb für Gaswechselventile einer Brennkraftmaschine
CN103758600A (zh) * 2014-02-18 2014-04-30 中国船舶重工集团公司第七一一研究所 用于柴油机中配气正时调节的控制装置及其控制方法
CN109973168B (zh) * 2019-03-27 2020-11-10 大连理工大学 一种多模式全可变机构

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GB2186939A (en) * 1986-02-20 1987-08-26 Ford Motor Co Cam drive mechanism
DE19629881A1 (de) * 1996-07-24 1998-01-29 Bayerische Motoren Werke Ag Ventiltrieb einer Brennkraftmaschine mit sich an einer Exzenterwelle abstützenden Schwinghebeln
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Also Published As

Publication number Publication date
EP2668376A1 (fr) 2013-12-04
EP2668376B8 (fr) 2015-02-25
JP2014503750A (ja) 2014-02-13
US20130306010A1 (en) 2013-11-21
CN103354860A (zh) 2013-10-16
CN103354860B (zh) 2016-08-10
WO2012100993A1 (fr) 2012-08-02
ES2532714T3 (es) 2015-03-31
DE102011009417A1 (de) 2012-07-26
US9074495B2 (en) 2015-07-07

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