DE102006046573A1 - Switchable drag lever of a valve train of an internal combustion engine - Google Patents
Switchable drag lever of a valve train of an internal combustion engine Download PDFInfo
- Publication number
- DE102006046573A1 DE102006046573A1 DE102006046573A DE102006046573A DE102006046573A1 DE 102006046573 A1 DE102006046573 A1 DE 102006046573A1 DE 102006046573 A DE102006046573 A DE 102006046573A DE 102006046573 A DE102006046573 A DE 102006046573A DE 102006046573 A1 DE102006046573 A1 DE 102006046573A1
- Authority
- DE
- Germany
- Prior art keywords
- lever
- axis
- leg
- drag
- contact surface
- 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.)
- Ceased
Links
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
- F01L13/0005—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
- 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
- F01L13/0015—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
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
- F01L2001/186—Split rocking arms, e.g. rocker arms having two articulated parts and means for varying the relative position of these parts or for selectively connecting the parts to move in unison
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
Vorgeschlagen ist ein schaltbarer Schlepphebel (1) eines Ventiltriebs einer Brennkraftmaschine, mit einem Innen- und einem diesen mit seinen Armen (2) umschließenden Außenhebel (3, 4). Der Innenhebel (3) hat an einem Ende (6) eine Anlage (7) für ein Gaswechselventil und am anderen Ende (8) eine Komplementärfläche (9) für ein Abstützelement. Der Außenhebel (4) besitzt auf jedem seiner Arme (2) eine Anlauffläche (10) für einen Großhub- und der Innenhebel (3) eine Anlauffläche (11) für einen Kleinhubnocken. Beide Hebel (3, 4) sind über im Innenhebel (3) oberhalb der Komplementärfläche (9) angeordnete Koppelmittel (12) derartig miteinander verbindbar, dass bei Kopplung ein großer und bei Entkopplung ein kleiner Ventilhub generiert ist. Des Weiteren verlaufen die Hebel (3, 4) an dem einen Ende (6) auf einer gemeinsamen Achse (13). Eine Drehschenkelfeder (14) als Lost-Motion-Feder ist seitlich außerhalb an Außenseiten (15) des Schlepphebels (1) auf von der Achse (13) abragenden Endstücken (16) positioniert. Somit kann die Achse (13) gegenüber Lösungen mit vom Innenhebel (3) auf der Achse (13) eingeschlossener Drehschenkelfeder konstruktiv näher an eine Quermittelebene des Schlepphebels (1) gerückt werden. Dies reduziert das Massenträgheitsmoment und verbessert die Hebelsteifigkeit.Proposed is a switchable drag lever (1) of a valve train of an internal combustion engine, with an inner and this with its arms (2) enclosing the outer lever (3, 4). The inner lever (3) has at one end (6) a system (7) for a gas exchange valve and at the other end (8) has a complementary surface (9) for a support element. The outer lever (4) has on each of its arms (2) a contact surface (10) for a Großhub- and the inner lever (3) a stop surface (11) for a small stroke cam. Both levers (3, 4) can be connected to one another in such a manner via coupling means (12) arranged above the complementary surface (9) in the inner lever (3) that a large valve lift is generated during coupling and a small valve lift during decoupling. Furthermore, the levers (3, 4) extend at one end (6) on a common axis (13). A torsion spring (14) as a lost-motion spring is positioned laterally outside on outer sides (15) of the drag lever (1) on the end pieces (16) projecting from the axle (13). Thus, the axis (13) with respect to solutions with the inner lever (3) on the axis (13) trapped torsion spring can be moved closer to a transverse center plane of the drag lever (1). This reduces the moment of inertia and improves the lever rigidity.
Description
Gebiet der ErfindungField of the invention
Die Erfindung betrifft einen schaltbaren Schlepphebel eines Ventiltriebs einer Brennkraftmaschine, mit einem Innen- und einem diesen mit seinen Armen umschließenden sowie relativ hierzu verschwenkbeweglichen Außenhebel, wobei der Innenhebel an einer Unterseite an einem Ende eine Anlage für ein Gaswechselventil und am anderen Ende eine Komplementärfläche für ein Abstützelement sowie der Außenhebel auf wenigstens einem Arm eine Anlauffläche für einen Großhubnocken und der Innenhebel eine Anlauffläche für einen Klein- oder 0-Hubnocken besitzt, wobei die Hebel über Koppelmittel derartig miteinander verbindbar sind, dass bei Kopplung ein großer und bei Entkopplung ein kleiner oder 0-Ventilhub generiert ist und wobei die Hebel an einem der Enden auf einer gemeinsamen Achse verlaufen, die von wenigstens einer Drehschenkelfeder als Lost-Motion-Feder umragt ist.The The invention relates to a switchable cam follower of a valve train an internal combustion engine, with an interior and this with enclosing his arms and relative to this pivotable outer lever, wherein the inner lever on a bottom at one end a system for a gas exchange valve and at the other end a complementary surface for a support element as well as the outside lever on at least one arm a contact surface for a Großhubnocken and the inner lever a contact surface for one Small or 0-lift cams owns, with the levers over Coupling means are connected to each other in such a way that when coupled a large and when decoupling a small or 0-valve lift is generated and the levers at one of the ends being on a common axis, that of at least one torsion spring as a lost-motion spring is surrounded.
Hintergrund der ErfindungBackground of the invention
Ein
derartiger Schlepphebel geht aus der als gattungsbildend betrachteten
Dem Fachmann ist klar, dass die Achse mit Lost-Motion-Feder beabstandet von der Rolle als Nockenanlauffläche im Innenhebel ausgeführt sein muss. Somit liegt die Achse mit masseerhöhender Lost-Motion-Feder relativ weit vom Schwenkpunkt des gesamten Hebels entfernt. Der Schlepphebel hat hierdurch ein unnötig hohes Massenträgheitsmoment um diesen Punkt. Gleichfalls liegt auf der Hand, dass auch der Außenhebel im entkoppelten Zustand wegen der weit am einen Ende liegenden Achse ein unnötig hohes Massenträgheitsmoment besitzt. Am Außenhebel findet bei dessen Kopplung eine ggf. zu große Durchbiegung bei Nockenbeaufschlagung statt, die durch entsprechende Versteifungsmaßnahmen gegengehalten werden muss. Durch den notwendigen Bauraum zur Integration der Lost-Motion-Feder im Innenhebel baut der Schlepphebel als solcher an dem einen Ende insgesamt gesehen nachteilig breit.the It is clear to a person skilled in the art that the axis is spaced apart by a lost-motion spring from the role as a cam contact surface executed in the inner lever have to be. Thus, the axis is relative to the mass-increasing lost-motion spring far from the pivot point of the entire lever. The rocker arm This makes it unnecessary high moment of inertia around this point. Likewise, it is obvious that the outer lever in the decoupled state because of the far end of one axis an unnecessary high moment of inertia has. At the outside lever If necessary, if the coupling is too large, deflection occurs when the cam is applied, which are countered by appropriate stiffening measures got to. Due to the necessary installation space for the integration of the Lost Motion spring in the inner lever of the drag lever builds as such at one end Overall, disadvantageously wide.
Aufgabe der ErfindungObject of the invention
Aufgabe der Erfindung ist es daher, einen Schlepphebel der vorgenannten Art zu schaffen, bei dem die zitierten Nachteile beseitigt sind.task The invention is therefore a drag lever of the aforementioned To create a way in which the cited disadvantages are eliminated.
Lösung der AufgabeSolution of the task
Erfindungsgemäß wird diese Aufgabe dadurch gelöst, dass die Drehschenkelfeder seitlich außerhalb an wenigstens einer Außenseite vom Schlepphebel auf einem von diesem abragenden Endstück der Achse positioniert ist.According to the invention this Task solved by the torsion spring is laterally outboard on at least one outside from the cam follower on a projecting end of the axle is positioned.
Hierdurch sind die vorbeschriebenen Nachteile wirkungsvoll beseitigt. Insbesondere kann durch die axial nach außen verlagerte Lost-Motion-Feder die Achse konstruktiv näher in Richtung Quermittelebene des Schlepphebels verlagert werden. Somit liegt ein insgesamt steiferer Schlepphebel mit geringerem Massenträgheitsmoment vor. Auch die vorgenannte Durchbiegung des Außenhebels bei dessen Kopplung ist verringert.hereby the above-described disadvantages are effectively eliminated. Especially can through the axially outward Lost motion spring shifted constructively towards the axis Transverse median plane of the towing lever are shifted. Thus lies an altogether stiffer drag lever with a lower mass moment of inertia in front. Also, the aforementioned deflection of the outer lever in its coupling is reduced.
Wird,
wie in Fortbildung der Erfindung vorgeschlagen, der Innenhebel zumindest
im Bereich zwischen seiner Anlauffläche und der Achse oder darüber hinaus
bis zu den fingerartigen Verlängerungen komplett „gerade" dargestellt, ist
ein zusätzlicher
Beitrag in Richtung Massereduzierung geleistet. Ein Negativbeispiel
hierzu zeigt die
Vorgesehen kann es sein, nur eine aus zwei Teilabschnitten bestehende Drehschenkelfeder vorzusehen, die im Bereich ihrer zweiten Schenkel miteinander verbunden ist. Jedoch kann auch nur insgesamt eine Drehschenkelfeder an einer Außenseite des Schlepphebels verlaufen oder es sind zwei separate Drehschenkelfedern vorgesehen, die nicht im Bereich ihrer zweiten Schenkel miteinander verbunden sind.Intended it may be, only a two-section torsion leg spring to be provided, which are interconnected in the region of their second leg is. However, only a total of a torsion spring on a Outside of the Pull levers or there are two separate torsion springs provided that are not in the area of their second legs with each other are connected.
Vorteilhaft ist es, wenn die abragenden Endstücke einteilig mit der Achse ausgebildet sind. Hier, wie auch bei der nachfolgend beschriebenen Variante, ist an gestufte bzw. ungestufte Varianten gedacht. Jedoch kann es auch vorgesehen sein, die Endstücke als separate Bauteile auszubilden und beispielsweise durch ein Befestigungsverfahren wie Pressen, Klipsen, Schweißen, Kleben, Ver stemmen oder durch eine Sicherungsringverbindung mit der Achse zu fixieren. Klar ist, dass sich eine derartig gebaute Variante gegebenenfalls relativ leicht montieren lässt. Auch liegt auf der Hand, dass durch die „nach außen" verlagerte Anordnung der Lost-Motion-Feder deren Montage erleichtert ist.Advantageous it is when the projecting end pieces are integral with the axle are formed. Here, as well as in the following Variant, is thought of graded or ungraded variants. however It can also be provided to form the end pieces as separate components and for example by a fastening method such as pressing, clipping, Welding, Gluing, Ver stemming or by a circlip with to fix the axis. It is clear that such a variant is built possibly relatively easy to assemble. It is also obvious that by the "after outside "relocated arrangement the Lost Motion spring whose assembly is facilitated.
Einfache Anlagemöglichkeiten der Schenkel der Drehschenkelfeder sind Gegenstand weiterer Unteransprüche. So kann der erste Schenkel unter eine von dem jeweiligen Arm des Außenhebels seitlich abstehende Anlage greifen, die in Fortbildung der Erfindung Bestandteil einer flügelartig abstehenden Anlauffläche des Außenhebels ist. Zur weiteren Fixierung ist es vorteilhaft, wenn dieser erste Schenkel an einer lateralen Führungsfläche eines zapfenartig von der Unterseite der Anlauffläche abstehenden Ansatzes anliegt.easy investment opportunities the legs of the torsion leg spring are the subject of further subclaims. So For example, the first leg may be under one of the respective arm of the outer lever laterally projecting attachment grab, the training in the invention Part of a wing-like protruding contact surface of the outer lever is. For further fixation, it is advantageous if this first Leg on a lateral guide surface of a peg-like from the bottom of the contact surface protruding approach rests.
Der zweite Schenkel der Lost-Motion-Feder kann, so wie in Unteranspruchsform vorgeschlagen, unter eine fingerartige Verlängerung des einen Endes des Innenhebels gebogen/gekröpft verlaufen.Of the second leg of the lost-motion spring can, as in Unteranspruchsform proposed under a finger-like extension of one end of the Inner lever bent / cranked run.
Als Nockenanlaufflächen sind am Schlepphebel Gleitflächen oder Rollen vorgesehen. Dabei kann der Schlepphebel als sog. Längs- oder Querverriegler dargestellt sein, wobei die Koppelmittel beispielsweise oberhalb der kalottenförmigen Komplementärfläche für das Abstützelement im Innenelement verlaufen und für den Koppelfall unter eine respektive Mitnehmerfläche des Außenhebels verlagert werden können.When Cam contact surfaces are sliding surfaces on the finger lever or rolls provided. In this case, the drag lever as so-called. Longitudinal or Querverriegler be shown, wherein the coupling means, for example above the dome-shaped Complementary surface for the support element run in the inner element and for the coupling case be displaced under a respective driver surface of the outer lever can.
Durch das konstruktive Verlagern der Achse in Richtung Quermittelebene des Schlepphebels kann die Achse in Seitenansicht auf den Schlepphebel gesehen in etwa mittig zur Anlage für das Gaswechselventil jedoch auch von dieser Mitte in Richtung zur Quermittelebene weggerückt verlaufen.By the constructive displacement of the axis in the direction of the transverse center plane of the rocker arm, the axle can be seen in side view of the rocker arm seen in about the middle of the plant for the gas exchange valve, however also moved away from this center in the direction of the transverse median plane.
Kurze Beschreibung der ZeichnungShort description of the drawing
Die Erfindung ist zweckmäßiger Weise anhand der Zeichnung näher beschrieben. Es zeigen:The Invention is expedient manner closer to the drawing described. Show it:
Ausführliche Beschreibung der ZeichnungDetailed description of the drawing
Dargestellt
ist ein schaltbarer Schlepphebel
Im
Bereich des einen Endes
In
Längsrichtung
gesehen (zum Ende
Des
Weiteren ist den Figuren zu entnehmen, dass eine Drehschenkelfeder
Erste
Schenkel
Ein
entsprechender zweiter Schenkel
Wie
des Weiteren zu erkennen, ist die beidseitige Drehschenkelfeder
- 11
- Schlepphebelcam follower
- 22
- Armpoor
- 33
- Innenhebelinternal lever
- 44
- Außenhebelexternal lever
- 55
- Unterseitebottom
- 66
- eines Endeone The End
- 77
- Anlageinvestment
- 88th
- anderes Endeother The End
- 99
- Komplementärflächecomplementary surface
- 1010
- Anlaufflächeapproach surface
- 1111
- Anlaufflächeapproach surface
- 12 12
- Koppelmittelcoupling means
- 1313
- Achseaxis
- 1414
- DrehschenkelfederTorsion spring
- 1515
- Außenseiteoutside
- 1616
- Endstücktail
- 1717
- Windungenturns
- 1818
- erster Schenkelfirst leg
- 1919
- Anlageinvestment
- 20 20
- zweiter Schenkelsecond leg
- 2121
- Anschlagflächestop surface
- 2222
- nicht vergebenNot forgive
- 23 23
- Unterseitebottom
- 24 24
- Ansatzapproach
- 2525
- Führungsflächeguide surface
- 26 26
- Verlängerungrenewal
- 2727
- Abschnittsection
- 2828
- Öffnungopening
- 2929
- Mitnehmerflächeentraining
Claims (12)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006046573A DE102006046573A1 (en) | 2006-09-30 | 2006-09-30 | Switchable drag lever of a valve train of an internal combustion engine |
PCT/EP2007/060029 WO2008037663A2 (en) | 2006-09-30 | 2007-09-21 | Switchable cam follower lever for the valve train of an internal combustion engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006046573A DE102006046573A1 (en) | 2006-09-30 | 2006-09-30 | Switchable drag lever of a valve train of an internal combustion engine |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102006046573A1 true DE102006046573A1 (en) | 2008-04-03 |
Family
ID=39134411
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102006046573A Ceased DE102006046573A1 (en) | 2006-09-30 | 2006-09-30 | Switchable drag lever of a valve train of an internal combustion engine |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE102006046573A1 (en) |
WO (1) | WO2008037663A2 (en) |
Cited By (32)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010015719A1 (en) | 2009-06-01 | 2010-12-30 | Schaeffler Technologies Gmbh & Co. Kg | Switchable drag lever for a valve train of an internal combustion engine |
WO2011116331A3 (en) * | 2010-03-19 | 2011-11-10 | Eaton Corporation | Switching rocker arm |
EP2418359A1 (en) * | 2010-08-13 | 2012-02-15 | Eaton Corporation | Single lobe deactivating rocker arm |
US8689753B2 (en) | 2010-06-11 | 2014-04-08 | Schaeffler Technologies AG & Co. KG | Locking mechanism for variable actuation using a shuttle pin and return spring |
US8915225B2 (en) | 2010-03-19 | 2014-12-23 | Eaton Corporation | Rocker arm assembly and components therefor |
US9016252B2 (en) | 2008-07-22 | 2015-04-28 | Eaton Corporation | System to diagnose variable valve actuation malfunctions by monitoring fluid pressure in a hydraulic lash adjuster gallery |
US9038586B2 (en) | 2010-03-19 | 2015-05-26 | Eaton Corporation | Rocker assembly having improved durability |
US9194260B2 (en) | 2010-03-19 | 2015-11-24 | Eaton Corporation | Switching rocker arm |
US9194261B2 (en) | 2011-03-18 | 2015-11-24 | Eaton Corporation | Custom VVA rocker arms for left hand and right hand orientations |
US9228454B2 (en) | 2010-03-19 | 2016-01-05 | Eaton Coporation | Systems, methods and devices for rocker arm position sensing |
US9267396B2 (en) | 2010-03-19 | 2016-02-23 | Eaton Corporation | Rocker arm assembly and components therefor |
USD750670S1 (en) | 2013-02-22 | 2016-03-01 | Eaton Corporation | Rocker arm |
US9284859B2 (en) | 2010-03-19 | 2016-03-15 | Eaton Corporation | Systems, methods, and devices for valve stem position sensing |
US9291075B2 (en) | 2008-07-22 | 2016-03-22 | Eaton Corporation | System to diagnose variable valve actuation malfunctions by monitoring fluid pressure in a control gallery |
DE102015221037A1 (en) | 2015-02-06 | 2016-08-11 | Schaeffler Technologies AG & Co. KG | Switchable drag lever |
DE102015208840A1 (en) | 2015-05-13 | 2016-11-17 | Schaeffler Technologies AG & Co. KG | Valve train of an internal combustion engine |
US9581058B2 (en) | 2010-08-13 | 2017-02-28 | Eaton Corporation | Development of a switching roller finger follower for cylinder deactivation in internal combustion engines |
DE102015223564A1 (en) | 2015-11-27 | 2017-06-01 | Schaeffler Technologies AG & Co. KG | Switchable drag lever |
DE102016202272A1 (en) | 2016-02-15 | 2017-08-17 | Schaeffler Technologies AG & Co. KG | Switchable drag lever |
DE102016208151A1 (en) | 2016-05-12 | 2017-11-16 | Schaeffler Technologies AG & Co. KG | Switchable valve drive member |
US9869211B2 (en) | 2014-03-03 | 2018-01-16 | Eaton Corporation | Valve actuating device and method of making same |
US9874122B2 (en) | 2010-03-19 | 2018-01-23 | Eaton Corporation | Rocker assembly having improved durability |
US9885258B2 (en) | 2010-03-19 | 2018-02-06 | Eaton Corporation | Latch interface for a valve actuating device |
DE102016217582A1 (en) | 2016-09-15 | 2018-03-15 | Schaeffler Technologies AG & Co. KG | Switchable valve drive component for an internal combustion engine |
US9938865B2 (en) | 2008-07-22 | 2018-04-10 | Eaton Corporation | Development of a switching roller finger follower for cylinder deactivation in internal combustion engines |
DE102016219705A1 (en) | 2016-10-11 | 2018-04-12 | Schaeffler Technologies AG & Co. KG | Switchable valve drive component for an internal combustion engine |
DE102016219704A1 (en) | 2016-10-11 | 2018-04-12 | Schaeffler Technologies AG & Co. KG | Switchable valve drive component for an internal combustion engine |
US10087790B2 (en) | 2009-07-22 | 2018-10-02 | Eaton Corporation | Cylinder head arrangement for variable valve actuation rocker arm assemblies |
CN109915224A (en) * | 2012-11-05 | 2019-06-21 | 伊顿公司 | For engaging the rocker arm of cam |
US10415439B2 (en) | 2008-07-22 | 2019-09-17 | Eaton Intelligent Power Limited | Development of a switching roller finger follower for cylinder deactivation in internal combustion engines |
US11181013B2 (en) | 2009-07-22 | 2021-11-23 | Eaton Intelligent Power Limited | Cylinder head arrangement for variable valve actuation rocker arm assemblies |
US11788439B2 (en) | 2010-03-19 | 2023-10-17 | Eaton Intelligent Power Limited | Development of a switching roller finger follower for cylinder deactivation in internal combustion engines |
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-
2006
- 2006-09-30 DE DE102006046573A patent/DE102006046573A1/en not_active Ceased
-
2007
- 2007-09-21 WO PCT/EP2007/060029 patent/WO2008037663A2/en active Application Filing
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