DE102006057895A1 - 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
- DE102006057895A1 DE102006057895A1 DE102006057895A DE102006057895A DE102006057895A1 DE 102006057895 A1 DE102006057895 A1 DE 102006057895A1 DE 102006057895 A DE102006057895 A DE 102006057895A DE 102006057895 A DE102006057895 A DE 102006057895A DE 102006057895 A1 DE102006057895 A1 DE 102006057895A1
- Authority
- DE
- Germany
- Prior art keywords
- coupling
- lever
- coupling piston
- bore
- 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
- F01L13/0015—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
- 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
-
- 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
Abstract
Vorgeschlagen ist ein schaltbarer Schlepphebel (1) eines Ventiltriebs einer Brennkraftmaschine, mit einem Außen- und einem zwischen dessen Armen (2) oder an dessen Arm verlaufenden Innenhebel (3, 4), wobei beide Hebel (3, 4) zueinander relativ verschwenkbeweglich sind und dem Innenhebel (4) einenends an seiner Unterseite (5) eine Kontaktfläche (6) für einen Kopf eines Abstützelements sowie anderenends eine Anlage für wenigstens ein Gaswechselventil immanent ist, wobei im Bereich der Kontaktfläche (6) eine Bohrung (7) mit zumindest einem Koppelkolben (8) verläuft, der für einen Koppelfall der Hebel (3, 4) abschnittsweise mit einer Mitnehmerfläche (9) des Außenhebels (3) in Eingriff bringbar ist, wobei an einer Oberseite (11) zumindest des Außenhebels (3) wenigstens eine Anlauffläche (12) für einen Hubnocken appliziert ist, wobei die Bohrung (7) aus genau zwei gestuften Abschnitten (13, 14) dargestellt ist, in denen der Koppelkolben (8) mit zwei gestuften, komplementären Mantelbereichen (15, 16) verläuft, wobei eine Wegbegrenzung des Koppelkolbens (8) in eine Richtung über eine Anlage dessen Ringbereich (17) zwischen seinen Mantelbereichen (15, 16) an einem Ringkragen (18) zwischen den Abschnitten (13, 14) der Bohrung (7) dargestellt ist.Proposed is a switchable drag lever (1) of a valve train of an internal combustion engine, with an outer and between the arms (2) or on the arm extending inner lever (3, 4), wherein both levers (3, 4) are relatively pivotable relative to each other and the inner lever (4) at one end on its underside (5) a contact surface (6) for a head of a support element and the other end a system for at least one gas exchange valve immanent, wherein in the region of the contact surface (6) has a bore (7) with at least one coupling piston (8) which can be brought into engagement with a driver surface (9) of the outer lever (3) in sections for a coupling case of the levers (3, 4), at least one contact surface (11) being provided on an upper side (11) of at least the outer lever (3). 12) is applied for a lifting cam, wherein the bore (7) from exactly two stepped portions (13, 14) is shown, in which the coupling piston (8) with two stepped, complementary Ma A distance limit of the coupling piston (8) in one direction over a system whose annular region (17) between its lateral regions (15, 16) on an annular collar (18) between the sections (13, 14) Hole (7) is shown.
Description
Gebiet der ErfindungField of the invention
Die Erfindung betrifft einen schaltbaren Schlepphebel eines Ventiltriebs einer Brennkraftmaschine, mit einem Außen- und einem zwischen dessen Armen oder an dessen Arm verlaufenden Innenhebel, wobei beide Hebel zueinander relativ verschwenkbeweglich sind und dem Innenhebel einenends an seiner Unterseite eine Kontaktfläche für einen Kopf eines Abstützelements sowie anderenends eine Anlage für wenigstens ein Gaswechselventil immanent ist, wobei im Bereich der Kontaktfläche eine Bohrung mit zumindest einem Koppelkolben verläuft, der für einen Koppelfall der Hebel abschnittsweise mit einer Mitnehmerfläche des Außenhebels in Eingriff bringbar ist und wobei an einer Oberseite zumindest des Außenhebels wenigstens eine Anlauffläche für einen Hubnocken appliziert ist.The The invention relates to a switchable cam follower of a valve train an internal combustion engine, with an outside and between the Poor or on the arm extending inner lever, both levers each other are relatively pivotable and the inner lever one end on its underside a contact surface for a head of a support element as well as the other end a plant for at least one gas exchange valve is intrinsic, being in the range of contact area a bore extends with at least one coupling piston, the for one Coupling case of the lever sections with a driver surface of the outside lever is engageable and wherein on an upper side at least of the outer lever at least one contact surface for one Hub cam is applied.
Hintergrund der ErfindungBackground of the invention
Derartige Schlepphebel sind der Fachwelt bekannt. In die jeweilige Bohrung für den Koppelkolben ist endseitig eine Anschlagbuchse eingepresst. Durch Letztere verläuft ein den Koppelkolben verlängernder Rohrabschnitt, welcher außen in einen Tellerbereich übergeht. Der Koppelkolben erfährt über den Tellerbereich an der Anschlagbuchse eine Wegbegrenzung in dessen Koppelrichtung. Die Buchse dient außerdem als einenendige Abstützung für die Schraubendruckfeder. Außerdem kann ein Innenstirnbereich der Buchse als Wegbegrenzung für den Koppelkolben in dessen Entkoppelrichtung dienen.such Drag levers are known in the art. Into the respective bore for the Coupling piston end of a stop bushing is pressed. By The latter runs a lengthening the coupling piston Pipe section, which outside goes into a plate area. The coupling piston learns about the Plate area at the stop bushing a Wegbegrenzung in the Coupling direction. The bush also serves as a single end support for the helical compression spring. Furthermore can an inner end of the bush as a travel limit for the coupling piston serve in its Entkoppelrichtung.
Nachteilig ist es bei der vorgenannten Ausgestaltung, dass der Fertigungs- und Montageaufwand für die Buchse relativ hoch ist. So muss diese hinsichtlich ihrer Einpresskraft und ihres Weges genau definiert in die Bohrung für den Koppelkolben eingebracht werden. Somit ist dem Fachmann klar, dass in diesem Bereich eine äußerst genaue Tolerierung bzw. Zupaarung erforderlich ist. Ein zu starkes Einpressen der Buchse kann zu einer unerwünschten Materialverformung im Bohrungsbereich führen. Auch besteht die Gefahr, dass die Buchse sich während des Betriebs des Schlepphebels löst und es somit zu einem Totalausfall des Koppelmechanismus kommt.adversely it is in the aforementioned embodiment that the manufacturing and assembly costs for the socket is relatively high. So this must be in terms of their insertion force and their path defined precisely introduced into the bore for the coupling piston become. Thus, it is clear to those skilled in the art that in this area an extremely accurate Toleration or Zupaarung is required. Too much pressing The socket may become an undesirable Material deformation in the bore area lead. There is also the danger that the socket is during the operation of the cam lever triggers and thus it comes to a total failure of the coupling mechanism.
Aufgabe der ErfindungObject of the invention
Aufgabe der Erfindung ist es daher, einen Schlepphebel der vorgenannten Art zu schaffen, bei welchem die zitierten Nachteile mit einfachen Mitteln beseitigt sind.task The invention is therefore a drag lever of the aforementioned Art to create, in which the cited disadvantages with simple Funds are eliminated.
Lösung der AufgabeSolution of the task
Erfindungsgemäß wird diese Aufgabe dadurch gelöst, dass die Bohrung aus genau zwei gestuften Abschnitten dargestellt ist, in denen der Koppelkolben mit zwei gestuften, komplementären Mantelbereichen verläuft, wobei eine Wegbegrenzung des Koppelkolbens in eine Richtung über eine Anlage dessen Ringbereichs zwischen seinen Mantelbereichen an einem Ringkragen zwischen den Abschnitten der Bohrung dargestellt ist.According to the invention this Task solved by that the hole is represented by exactly two stepped sections is, in which the coupling piston with two stepped, complementary jacket areas runs, wherein a travel limit of the coupling piston in one direction over a Plant the ring area between its lateral areas at one Ring collar is shown between the sections of the hole.
Zweckmäßige Konkretisierungen der Erfindung sind Gegenstand der Unteransprüche, denen auch selbständig schutzfähige Maßnahmen immanent sein können.Appropriate concretizations The invention are the subject of the dependent claims, which also independently protectable measures can be immanent.
Somit liegt ein schaltbarer Schlepphebel vor, der im Bereich seines Koppelmechanismus deutlich vereinfacht aufgebaut ist und der sich leicht montieren lässt. Es ist lediglich erforderlich, die Bohrung für den Koppelkolben aus besonders bevorzugt zwei gestuften Abschnitten darzustellen (ggf. sind auch mehr als zwei Stufen denkbar), in welchen dann der ebenfalls zweigestufte Koppelkolben verläuft. Durch die vorgenannte Anlage des Ringbereichs des Koppelkolbens an dem Ringkragen der Bohrung ist dessen Endposition in Koppel- oder Entkoppelrichtung sicher determiniert.Consequently There is a switchable drag lever in the area of its coupling mechanism has a simpler structure and is easy to assemble leaves. It is only necessary, the bore for the coupling piston from particular preferably two stepped sections represent (possibly also more than two stages conceivable), in which then also the two-tiered Coupling piston runs. By the aforementioned system of the ring portion of the coupling piston on the annular collar of the bore is its end position in coupling or decoupling safely determined.
Ggf. kann die Bohrung in beide Richtungen einen Ringkragen besitzen, durch den die Bewegung des Koppelkolbens in beide Richtungen festlegbar ist. Auch können der Ringbereich sowie der Ringkragen kegelförmig angestellt sein. Zweckmäßigerweise soll der Koppelkolben einteilig ausgebildet sein. Ggf. ist auch dessen mehrteilige Ausbildung denkbar und vorgesehen.Possibly. the bore can have a ring collar in both directions, by which the movement of the coupling piston can be fixed in both directions. Also can the ring area and the ring collar be made cone-shaped. Appropriately, should the coupling piston may be integrally formed. Possibly. is also his multi-part training conceivable and planned.
Aufgrund des Wegfalls der Anschlagbuchse aus dem Stand der Technik kann der gesamte Koppelmechanismus axial und ggf. auch radial kleiner bauen.by virtue of the omission of the stop bushing of the prior art, the build entire coupling mechanism axially and possibly also radially smaller.
Fertigungstechnisch besonders einfach ist es, die Bohrung längs durchgehend darzustellen. Die Mitnehmerfläche des im Entkoppelfall abschwenkenden Außenhebels kann beispielsweise als schalenartige Unterseite oder als Bohrung ausgebildet sein, unter oder in die der Koppelkolben im Koppelfall einfährt.manufacturing technology it is particularly easy to represent the bore longitudinally throughout. The driving surface the swiveling in the decoupling outer lever can, for example be designed as a shell-like bottom or as a bore, under or in which the coupling piston retracts in the coupling case.
Besonders bevorzugt ist es, wenn der Koppelkolben mit seiner Bohrung als so genannter „Längsverriegler" ausgebildet ist. Ebenfalls besonders bevorzugt ist es, den Koppelkolben schräg unter die Mitnehmerfläche des Querbereichs des Außenhebels fahren zu lassen. Ggf. kann der Koppelkolben auch quer verriegeln.Especially it is preferred if the coupling piston with its bore as so is called "Längsverriegler" is formed. Also particularly preferred is the coupling piston obliquely below the entraining the transverse area of the outer lever to drive. Possibly. The coupling piston can also lock transversely.
Der erfindungsgemäße Schlepphebel kann entweder als Ventilhubumschalter oder ggf. als Ventilhubabschalter ausgebildet sein.Of the Rocker arm according to the invention can either be used as a valve lift switch or possibly as a valve lift switch be educated.
Es ist des Weiteren vorgeschlagen, dass der Koppelkolben in dessen Koppelrichtung über Druckfederkraft beaufschlagt ist. Alternativ kann der Koppelkolben auch in dessen Entkoppelrichtung über Druckfederkraft verlagert werden. Eine Rückstellung des Koppelkolbens in die jeweils andere Richtung soll über Hydraulikmittel erfolgen, das aus dem Abstützelement über die Kontaktfläche heranleitbar ist. Aufgrund des Ringraums am Ringkragen kann auf separate Maßnahmen zur Schaffung eines Druckraums verzichtet werden.It is further proposed that the coupling piston in the Coupling direction over Compression spring force is applied. Alternatively, the coupling piston also shifted in the Entkoppelrichtung about compression spring force become. A provision of the Coupling piston in the other direction should via hydraulic means take place, from the support element on the contact area can be deduced. Due to the annulus on the ring collar can be on separate activities to avoid the creation of a pressure chamber.
Um axialen Bauraum zu sparen, kann bei einer Variante die wenigstens eine Druckfeder in einem Sackloch im Bereich der Innenstirn des Koppelkolbens verlaufen.Around To save axial space, in a variant that at least a compression spring in a blind hole in the area of the inner front of the Coupling piston run.
Auch ist es vorgeschlagen, die Druckfeder an einem Ende an einem separaten Anschlagring anzulegen, der in dem größeren Bohrungsabschnitt zumindest mittelbar befestigt ist. Zwar kann der Anschlagring unmittelbar in die Bohrung eingepresst sein, denkbar und vorgesehen ist es jedoch auch, diesen über einen einfachen Sprengring oder dergleichen in der Bohrung zu fixieren, welcher Sprengring in einer entsprechenden Ringnut der Bohrung verläuft.Also It is proposed that the compression spring at one end to a separate Stop ring to create, in the larger bore section at least is indirectly attached. Although the stop ring can be immediate be pressed into the hole, but conceivable and provided it is also, this over to fix a simple snap ring or the like in the hole, which snap ring extends in a corresponding annular groove of the bore.
Kurze Beschreibung der ZeichnungShort description of the drawing
Die Erfindung ist zweckmäßigerweise anhand der Zeichnung näher erläutert. Es zeigtThe Invention is suitably closer to the drawing explained. It shows
Ausführliche Beschreibung der ZeichnungDetailed description of the drawing
Dargestellt
ist in
Der
Schlepphebel
Oberhalb
der Kontaktfläche
Zu
erkennen ist in
Nach
Dargestellt
ist in
Aus
- 11
- Schlepphebelcam follower
- 22
- Armpoor
- 33
- Außenhebelexternal lever
- 44
- Innenhebelinternal lever
- 55
- Unterseitebottom
- 66
- Kontaktflächecontact area
- 77
- Bohrungdrilling
- 88th
- Koppelkolbencoupling pistons
- 99
- Mitnehmerflächeentraining
- 1010
- TellerPlate
- 1111
- Oberseitetop
- 1212
- Anlaufflächeapproach surface
- 1313
- Abschnittsection
- 1414
- Abschnittsection
- 1515
- Mantelbereichcladding region
- 1616
- Mantelbereichcladding region
- 1717
- Ringbereichring area
- 1818
- Ringkragengorget
- 1919
- Querbereichcross section
- 2020
- SchraubendruckfederHelical compression spring
- 2121
- Innenstirninterior forehead
- 2222
- Anschlagringstop ring
- 2323
- Direktkanaldirect channel
- 2424
- Ringraumannulus
- 2525
- Sicherungselementfuse element
- 2626
- nicht vergebenNot forgive
- 2727
- nicht vergebenNot forgive
- 2828
- Sacklochblind
Claims (10)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006057895A DE102006057895A1 (en) | 2006-12-08 | 2006-12-08 | Switchable drag lever of a valve train of an internal combustion engine |
PCT/EP2007/063265 WO2008068251A1 (en) | 2006-12-08 | 2007-12-04 | Switchable cam lever of a valve drive of an internal combustion engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006057895A DE102006057895A1 (en) | 2006-12-08 | 2006-12-08 | Switchable drag lever of a valve train of an internal combustion engine |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102006057895A1 true DE102006057895A1 (en) | 2008-06-12 |
Family
ID=39148620
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102006057895A Ceased DE102006057895A1 (en) | 2006-12-08 | 2006-12-08 | Switchable drag lever of a valve train of an internal combustion engine |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE102006057895A1 (en) |
WO (1) | WO2008068251A1 (en) |
Cited By (23)
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---|---|---|---|---|
WO2011116329A3 (en) * | 2010-03-19 | 2011-11-10 | Eaton Corporation | Switching rocker arm |
DE102010046434A1 (en) | 2010-09-24 | 2012-03-29 | Schaeffler Technologies Gmbh & Co. Kg | Arrangement for coupling two mutually movably arranged components of an internal combustion engine |
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 |
US9194261B2 (en) | 2011-03-18 | 2015-11-24 | Eaton Corporation | Custom VVA rocker arms for left hand and right hand orientations |
US9194260B2 (en) | 2010-03-19 | 2015-11-24 | Eaton Corporation | Switching rocker arm |
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 |
US9581058B2 (en) | 2010-08-13 | 2017-02-28 | Eaton Corporation | Development of a switching roller finger follower for cylinder deactivation in internal combustion engines |
DE102016125216A1 (en) * | 2016-12-21 | 2017-10-26 | Schaeffler Technologies AG & Co. KG | Switchable valve drive component for an internal combustion engine |
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 |
US9938865B2 (en) | 2008-07-22 | 2018-04-10 | Eaton Corporation | Development of a switching roller finger follower for cylinder deactivation in internal combustion engines |
EP3346102A1 (en) * | 2017-01-10 | 2018-07-11 | OTICS Corporation | Variable valve mechanism of internal combustion engine |
US10087790B2 (en) | 2009-07-22 | 2018-10-02 | Eaton Corporation | Cylinder head arrangement for variable valve actuation rocker arm assemblies |
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 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10196944B2 (en) | 2014-10-10 | 2019-02-05 | Schaeffler Technologies AG & Co. KG | Mechanical lash control for a switchable roller finger follower |
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Cited By (50)
Publication number | Priority date | Publication date | Assignee | Title |
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