DE102005035053A1 - Cam follower for valve operating mechanism of internal combustion engine, has first and second piston which is arranged as a coupling means, their displacement is present in over hydraulic medium pressure - Google Patents
Cam follower for valve operating mechanism of internal combustion engine, has first and second piston which is arranged as a coupling means, their displacement is present in over hydraulic medium pressure Download PDFInfo
- Publication number
- DE102005035053A1 DE102005035053A1 DE102005035053A DE102005035053A DE102005035053A1 DE 102005035053 A1 DE102005035053 A1 DE 102005035053A1 DE 102005035053 A DE102005035053 A DE 102005035053A DE 102005035053 A DE102005035053 A DE 102005035053A DE 102005035053 A1 DE102005035053 A1 DE 102005035053A1
- Authority
- DE
- Germany
- Prior art keywords
- lever
- piston
- coupling
- cam follower
- spring
- 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.)
- Withdrawn
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
- 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
- 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
-
- 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
- F01L2305/00—Valve arrangements comprising rollers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
Description
Gebiet der ErfindungTerritory of invention
Die Erfindung betrifft einen Schlepphebel eines Ventiltriebs einer Brennkraftmaschine, der auf unterschiedliche Hubhöhen für wenigstens ein Gaswechselventil umschaltbar ist sowie an einem Ende eine Anlage für ein Gaswechselventil und am anderen Ende ein Schwenklager für ein Abstützelement oder eine Achse besitzt.The The invention relates to a drag lever of a valve train of an internal combustion engine, at different lifting heights for at least a gas exchange valve is switchable and at one end a plant for a Gas exchange valve and at the other end a pivot bearing for a support element or has an axis.
Hintergrund der Erfindungbackground the invention
Ein
derartiger Schlepphebel ist in der
Nachteilig ist es bei dem vorgenannten Schlepphebel, dass dieser nur eine eingeschränkte Variabilität besitzt. So kann generell nur zwischen Voll- und Nullhub bzw. Voll- und Minimalhub umgeschaltet werden.adversely it is with the aforementioned drag lever that this has only a limited variability. So can generally only between full and zero stroke or full and minimum stroke be switched.
Aufgabe der ErfindungTask of invention
Aufgabe der Erfindung ist es daher, einen schaltbaren Schlepphebel der vorgenannten Art zu schaffen, der eine größere Variabilität bei gleichzeitig relativ einfachem Aufbau besitzt.task The invention is therefore a switchable drag lever of the aforementioned To create a kind of greater variability while at the same time relative has simple structure.
Lösung der AufgabeSolution of task
Erfindungsgemäß wird diese Aufgabe durch die neuen Merkmale des Anspruchs 1 gelöst. Insbesondere ist ein rahmenartig ineinander geschachteltes Hebelsystem vorgeschlagen, bestehend aus einem Außen-, Zwischen- und Innenhebel, die auf einer gemeinsamen Schwenkachse verlaufen und die über separat ansteuerbare erste und zweite Kolben auf der Seite eines Schwenklagers für ein Abstützelement oder einer Achse wahlweise zur Erzielung der unterschiedlichen Hubhöhen miteinander koppelbar sind.According to the invention this Problem solved by the novel features of claim 1. Especially is proposed a frame-like nested lever system, consisting of an exterior, Intermediate and inner lever, which are on a common pivot axis run and the over separately controllable first and second pistons on the side of a Pivot bearings for a support element or an axle either to achieve the different lifting heights with each other can be coupled.
Somit liegt ein Schlepphebel schaltbarer Bauart vor, der eine größere Variabilität als die bisherig bekannten besitzt, wobei sich der Bauaufwand zur Erzielung eines weiteren Hubverlaufes in akzeptablen Grenzen hält.Consequently There is a rocker arm switchable design, the greater variability than the has previously known, with the construction cost to achieve a further Hubverlaufes within acceptable limits holds.
Selbstverständlich sind vom Schutzbereich dieser Erfindung auch Lösungen einbezogen, bei welchen die Koppelmittel nicht längs, sondern quer oder schräg bzw. windschief verlagerbar sind. Auch können die Koppelmittel im Bereich der Gegenlaufmittel für Nocken verlaufen.Of course they are The scope of this invention also includes solutions in which the coupling means are not longitudinal, but transverse or oblique or skewed are displaced. Also, the coupling agents in the area the antithesis means for Cams run.
Anstelle der vorgeschlagenen Kolben ist auch an andere Elemente zur Kopplung wie Keile, Schieber usw. gedacht. Auch können ggf. Schieber-Kugel-Mechanismen appliziert werden.Instead of the proposed piston is also to other elements for coupling like wedges, sliders, etc. thought. If necessary, slider-ball mechanisms can also be applied become.
Für den Fall der gleichzeitigen Entkopplung sämtlicher Hebel und gewünschtem Minimalhub ist es erforderlich, dass die Anlauffläche am Zwischenhebel mit einem entsprechenden Minimalhubnocken kommuniziert. Für den Fall einer gewünschten vollständigen Abschaltung soll die Fläche am Zwischenhebel als Stützfläche für einen so genannten Grundkreisnocken ausgebildet sein. Diese Fläche verhindert auch ein „Aufpumpen" des vorzugsweise endseitig als Abstützung applizierten hydraulischen Abstützelements, mit den der Fachwelt bekannten Nachteilen wie einer Verspannung im System.In the case the simultaneous decoupling of all Lever and desired Minimal lift it is necessary that the contact surface on the intermediate lever communicates with a corresponding minimum lift cam. In the case a desired one complete Shutdown should be the area on the intermediate lever as a support surface for a be formed so-called base circle cam. This surface prevents also a "pumping" of the preferably end as support applied hydraulic support element, with the disadvantages known to the experts, such as a tension in the system.
Anstelle des eben genannten Abstützelements ist jedoch auch eine Schwenkachse oder dgl. als einenendige Lagerung für den schaltbaren Schlepphebel denkbar und vorgesehen.Instead of the above-mentioned support element However, is also a pivot axis or the like. As a single-ended storage for the switchable drag lever conceivable and provided.
Eine Zuleitung des Hydraulikmittels zu den Kolben erfolgt in an sich bekannter Art und Weise über das Schwenklager und kurze Kanäle zu Druckkammern axial vor den Kolben.A Supply of the hydraulic fluid to the piston takes place in itself known way about the pivot bearing and short channels to pressure chambers axially in front of the piston.
Zwar ist es besonders vorteilhaft, wenn eine Verlagerung der Kolben in ihre eine Richtung über Hydraulikmitteldruck und in die entgegengesetzte Richtung über Druckfederkraft bewerkstelligt ist. Es ist jedoch auch denkbar, eine Rückstellung ebenfalls über Hydraulikmitteldruck oder ein anderes geeignetes Servomittel darzustellen. Ggf. ist auch eine generelle Beaufschlagung der Kolben in wenigstens eine Richtung über elektromagnetische Beaufschlagungsmittel möglich.Though It is particularly advantageous if a displacement of the piston in their one direction over hydraulic fluid pressure and accomplished in the opposite direction via compression spring force is. However, it is also conceivable, a provision also via hydraulic fluid pressure or other suitable servo means. Possibly. is too a general admission of the piston in at least one direction via electromagnetic Loading agent possible.
Besonders vorteilhaft ist es, wenn die Kolben zur Kopplung (wenigstens zwei) übereinander „gestapelt" oberhalb des Schwenklagers verlaufen. Somit wird seitlich Bauraum gespart. Als Mitnehmerflächen für die Kolben an den entspre chenden Endseiten der Hebel dienen entweder komplementär ausgesparte Unterseiten oder Bohrungen in diesem Bereich.Especially It is advantageous if the pistons for coupling (at least two) "stacked" above one another above the pivot bearing run. Thus, space is saved laterally. As driving surfaces for the pistons At the corre sponding end sides of the levers are either recessed complementary Bottoms or holes in this area.
Gemäß einem weiteren Unteranspruch sind die Druckfedern zur Verlagerung der Kolben in eine Richtung vorzugsweise in die Bohrung für den jeweiligen Kolben integriert und liegen an einem Ende an einer in der entsprechenden Bohrung jeweils fest angeordneten Anschlaghülse an. Letztere dient gleichzeitig als Wegbegrenzung für den Kolben in der Bohrung.According to a further sub-claim, the compression springs for displacing the piston in one Direction preferably integrated into the bore for the respective piston and are at one end to a respective fixed bore in the corresponding hole stop sleeve. The latter also serves as travel limit for the piston in the bore.
Zur Rückführung des Außenhebels in dessen abgeschalteten Zustand an den Nocken ist wenigstens eine Drehschenkelfeder (Lost-Motion-Feder) vorgesehen. Diese sitzt zweckmäßigerweise auf der Schwenkachse, wobei ein Schenkel der Feder im Verdrehsinn auf den Außenhebel und ein weiterer Schenkel der Feder auf den Innenhebel einwirkt. Eine weitere Lost-Motion-Feder ist zwischen einer Unterseite des Innenhebels und einer Oberseite eines Querbügels des Zwischenhebels eingebaut. Somit ist im Abkoppelfall des Innenhebels ebenfalls dessen Rückführung an den Nocken über alle Drehzahlbereiche hinweg garantiert.to Return of the outside lever in the off state to the cam is at least one Torque spring (lost-motion spring) provided. This sits conveniently on the pivot axis, wherein a leg of the spring in the direction of rotation on the outside lever and another leg of the spring acts on the inner lever. A another Lost Motion spring is between a bottom of the inner lever and a top of a cross bow built the intermediate lever. Thus, in the case of disconnection of the inner lever also his return to the cam over guaranteed all speed ranges across.
Kurze Beschreibung der ZeichnungShort description the drawing
Die Erfindung ist zweckmäßigerweise anhand der Zeichnung näher erläutert. Es zeigen:The Invention is suitably closer to the drawing explained. Show it:
Ausführliche Beschreibung der ZeichnungFull Description of the drawing
Die
Figuren offenbaren einen Schlepphebel
An
einer Unterseite
Die
Hebel
Eine
weitere Lost-Motion-Feder ist zwischen einer Unterseite
Zudem
offenbart
Wie
eingangs genannt, können
durch die erfindungsgemäßen Maßnahmen
insgesamt drei unterschiedliche Hubhöhen für wenigstens ein Gaswechselventil
dargestellt werden. Wie
Von
einer inneren Stirnfläche
Oberhalb
der Bohrung
Der
Schlepphebel
Die
Hebel
- 11
- Schlepphebelcam follower
- 22
- Außenhebelexternal lever
- 33
- Zwischenhebelintermediate lever
- 44
- Innenhebelinternal lever
- 55
- Schwenkachseswivel axis
- 66
- Unterseitebottom
- 77
- EndeThe End
- 88th
- Anlageinvestment
- 99
- EndeThe End
- 1010
- Schwenklagerpivot bearing
- 1111
- Kolbenpiston
- 1212
- Kolbenpiston
- 1313
- Anlaufflächeapproach surface
- 1414
- Anlaufflächeapproach surface
- 1515
- Stützflächesupport surface
- 1616
- Bohrungdrilling
- 1717
- Mitnehmerflächeentraining
- 1818
- Querbalkencrossbeam
- 1919
- Bohrungdrilling
- 2020
- Mitnehmerflächeentraining
- 2121
- Querbügellocking latch
- 2222
- Druckfedercompression spring
- 2323
- Druckfedercompression spring
- 2424
- Anschlaghülsestop sleeve
- 2525
- Anschlaghülsestop sleeve
- 2626
- Stirnforehead
- 2727
- Stirnforehead
- 2828
- Stirnflächeface
- 2929
- Stirnflächeface
- 3030
- Zylinderabschnittcylinder section
- 3131
- Zylinderabschnittcylinder section
- 3232
- Öffnungopening
- 3333
- Öffnungopening
- 3434
- nicht vergebenNot forgive
- 3535
- Federtellerspring plate
- 3636
- DrehschenkelfederTorsion spring
- 3737
- nicht vergebenNot forgive
- 3838
- Unterseitebottom
- 3939
- Oberseitetop
- 4040
- Querbügellocking latch
- 4141
- Druckfedercompression spring
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005035053A DE102005035053A1 (en) | 2005-07-27 | 2005-07-27 | Cam follower for valve operating mechanism of internal combustion engine, has first and second piston which is arranged as a coupling means, their displacement is present in over hydraulic medium pressure |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005035053A DE102005035053A1 (en) | 2005-07-27 | 2005-07-27 | Cam follower for valve operating mechanism of internal combustion engine, has first and second piston which is arranged as a coupling means, their displacement is present in over hydraulic medium pressure |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102005035053A1 true DE102005035053A1 (en) | 2007-02-01 |
Family
ID=37650222
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102005035053A Withdrawn DE102005035053A1 (en) | 2005-07-27 | 2005-07-27 | Cam follower for valve operating mechanism of internal combustion engine, has first and second piston which is arranged as a coupling means, their displacement is present in over hydraulic medium pressure |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102005035053A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007031815A1 (en) | 2007-07-07 | 2009-01-08 | Schaeffler Kg | Valve gear for internal combustion engine, has control unit adjusting roller and formed at cam arrangement of cam shaft, where roller is admittable with different cam contours by control unit based on switched-rolling position of roller |
WO2012069215A1 (en) * | 2010-11-25 | 2012-05-31 | Schaeffler Technologies AG & Co. KG | Switchable cam follower |
CN111701269A (en) * | 2020-06-12 | 2020-09-25 | 万华化学集团股份有限公司 | Flow pressure control method, storage medium, and electronic device |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0420159A1 (en) * | 1989-09-25 | 1991-04-03 | Nissan Motor Co., Ltd. | Variable valve timing rocker arm arrangement for internal combustion engine |
DE4206166A1 (en) * | 1991-03-14 | 1992-09-17 | Volkswagen Ag | Variable valve drive with cams driving inner and outer valve stems - has stems coupled by radially sliding pistons in outer stem, engaging inner stem stops during the cam base circle phase |
EP0601250A1 (en) * | 1991-09-04 | 1994-06-15 | Honda Giken Kogyo Kabushiki Kaisha | Valve operating system in internal combustion engine |
DE4436952A1 (en) * | 1994-10-15 | 1996-04-18 | Schaeffler Waelzlager Kg | Switchable tappet of a valve train of an internal combustion engine |
DE19922600A1 (en) * | 1998-06-09 | 1999-12-16 | Ford Global Tech Inc | Internal combustion engine with variable camshaft synchronization and with an exhaust phase of variable duration |
JP2001241309A (en) * | 2000-02-29 | 2001-09-07 | Unisia Jecs Corp | Valve operating device of engine |
DE10310226A1 (en) * | 2003-03-08 | 2004-09-16 | Ina-Schaeffler Kg | Drag lever of a valve train of an internal combustion engine |
DE10316189A1 (en) * | 2003-04-09 | 2004-10-28 | Ina-Schaeffler Kg | Tow lever for a combustion engine valve drive has outer and inner levers connected through an axle across the inner lever |
DE10318295A1 (en) * | 2003-04-23 | 2004-11-11 | Ina-Schaeffler Kg | Drag lever of a valve train of an internal combustion engine |
-
2005
- 2005-07-27 DE DE102005035053A patent/DE102005035053A1/en not_active Withdrawn
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0420159A1 (en) * | 1989-09-25 | 1991-04-03 | Nissan Motor Co., Ltd. | Variable valve timing rocker arm arrangement for internal combustion engine |
DE4206166A1 (en) * | 1991-03-14 | 1992-09-17 | Volkswagen Ag | Variable valve drive with cams driving inner and outer valve stems - has stems coupled by radially sliding pistons in outer stem, engaging inner stem stops during the cam base circle phase |
EP0601250A1 (en) * | 1991-09-04 | 1994-06-15 | Honda Giken Kogyo Kabushiki Kaisha | Valve operating system in internal combustion engine |
DE4436952A1 (en) * | 1994-10-15 | 1996-04-18 | Schaeffler Waelzlager Kg | Switchable tappet of a valve train of an internal combustion engine |
DE19922600A1 (en) * | 1998-06-09 | 1999-12-16 | Ford Global Tech Inc | Internal combustion engine with variable camshaft synchronization and with an exhaust phase of variable duration |
JP2001241309A (en) * | 2000-02-29 | 2001-09-07 | Unisia Jecs Corp | Valve operating device of engine |
DE10310226A1 (en) * | 2003-03-08 | 2004-09-16 | Ina-Schaeffler Kg | Drag lever of a valve train of an internal combustion engine |
DE10316189A1 (en) * | 2003-04-09 | 2004-10-28 | Ina-Schaeffler Kg | Tow lever for a combustion engine valve drive has outer and inner levers connected through an axle across the inner lever |
DE10318295A1 (en) * | 2003-04-23 | 2004-11-11 | Ina-Schaeffler Kg | Drag lever of a valve train of an internal combustion engine |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007031815A1 (en) | 2007-07-07 | 2009-01-08 | Schaeffler Kg | Valve gear for internal combustion engine, has control unit adjusting roller and formed at cam arrangement of cam shaft, where roller is admittable with different cam contours by control unit based on switched-rolling position of roller |
WO2012069215A1 (en) * | 2010-11-25 | 2012-05-31 | Schaeffler Technologies AG & Co. KG | Switchable cam follower |
US8783219B2 (en) | 2010-11-25 | 2014-07-22 | Schaeffler Technologies Gmbh & Co. Kg | Switchable cam follower |
CN111701269A (en) * | 2020-06-12 | 2020-09-25 | 万华化学集团股份有限公司 | Flow pressure control method, storage medium, and electronic device |
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Legal Events
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OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
8127 | New person/name/address of the applicant |
Owner name: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG, 91074 H, DE |
|
R081 | Change of applicant/patentee |
Owner name: SCHAEFFLER TECHNOLOGIES AG & CO. KG, DE Free format text: FORMER OWNER: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG, 91074 HERZOGENAURACH, DE Effective date: 20120822 |
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R005 | Application deemed withdrawn due to failure to request examination |
Effective date: 20120728 |