WO2012107121A1 - Levier intermédiaire - Google Patents

Levier intermédiaire Download PDF

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Publication number
WO2012107121A1
WO2012107121A1 PCT/EP2011/070190 EP2011070190W WO2012107121A1 WO 2012107121 A1 WO2012107121 A1 WO 2012107121A1 EP 2011070190 W EP2011070190 W EP 2011070190W WO 2012107121 A1 WO2012107121 A1 WO 2012107121A1
Authority
WO
WIPO (PCT)
Prior art keywords
intermediate lever
counter
rollers
cam
contact surface
Prior art date
Application number
PCT/EP2011/070190
Other languages
German (de)
English (en)
Inventor
Wolfgang Christgen
Michael Schober
Original Assignee
Schaeffler Technologies AG & Co. KG
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 Schaeffler Technologies AG & Co. KG filed Critical Schaeffler Technologies AG & Co. KG
Priority to CN201180065682.9A priority Critical patent/CN103328777B/zh
Publication of WO2012107121A1 publication Critical patent/WO2012107121A1/fr

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
    • F01L13/0063—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
    • 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
    • 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
    • F01L2305/00—Valve arrangements comprising rollers
    • F01L2305/02—Mounting of rollers

Definitions

  • the invention relates to an intermediate lever for a variable valve train of an internal combustion engine, with two at one end on a shaft extending support rollers, which support rollers include a stop surface, wherein in a center portion of the intermediate lever at least one positioned on a further axis counter roller for a lift cam is arranged and wherein at a further end face a surface for variable transmission of a stroke of the lifting cam sits on a tap of a follower member.
  • Such an intermediate lever is shown in FIGS. 5, 6 of DE 10 2006 018 512 A1.
  • This has two bar-shaped side walls.
  • the side walls include a total of three roller bearings, of which two rollers act as support rollers for a counter-rotation on a slide track and the roller lying between them as a starting roller for a cam.
  • the intermediate lever has another roller bearing roller for a cam start.
  • the side walls converge toward one another to form a hub transmission surface connecting them.
  • the intermediate lever is made of sheet metal in a complex, consisting of too many processing steps and thus in mass production still too expensive punch-bending process. Since the side walls comprise the rollers on the outside, the intermediate lever may build too wide.
  • the invention is therefore based on the object to provide an intermediate lever of the aforementioned type, in which the indicated disadvantages are eliminated.
  • a very inexpensive producible and simply constructed intermediate lever to be created.
  • this object is achieved in that two mating rollers are provided for the lifting cam, wherein each run a counter-rotating and one support roller on an outer wall of the intermediate lever and wherein the intermediate lever viewed from the outer contour ago as at least substantially closed block is present.
  • the intermediate lever for example, simply from a sheet metal blank, whose thickness preferably has the width of the intermediate lever punched or made in a forging process. Alternatively, it can also be machined (milling or the like) or at least machined or represented by casting / sintering. An MIM training is also thought.
  • the intermediate lever is thus available as a simple block or as a solid part. The aforementioned bending processes are eliminated. Due to the outer layer of the rollers, the intermediate lever also builds comparatively narrow. Mounting the axles and rollers is extremely easy.
  • the intermediate lever can be used in a fully variable valve train for throttle-free load control, as it is installed by the Bavarian Motor Works under the name "Valvetronic.” It is useful, either the start-up surface for the cam or for the slide track in the middle directly at one end In the case of the central arrangement of the contact surface for the cam disk, a good, tilt-proof guidance of the intermediate lever on the slide track takes place via the outer-walled rollers.
  • An axial line of the bulge runs according to a further development of the invention coaxially to the axial line of the support rollers at one end.
  • a storage of the axes in the intermediate lever via a roller bearing such as a needle bearing.
  • the rollers themselves are simply pressed onto the projecting axle stumps, for example.
  • there are also alternative forms of attachment such as end-side caulking, welding or tongue and groove connections in question.
  • the support rollers on the projecting stub axle be rolling or sliding bearings.
  • the surface for variably transmitting the cam lift at the other end consists of a zero stroke and a stroke range. It is connected in one piece to the intermediate lever and runs on undersides of bilaterally Hebelverschwenkraum bow-like protruding extensions. Possibly. In this area, a variant is also conceivable or an embodiment in which only one extension is projected.
  • tabs for guiding a force acting on the intermediate lever cam return spring should project in one piece from an upper side or end face of one of the extensions.
  • These tabs can be represented, for example, by embossing, bending or cutting.
  • the mating rollers for the lifting cam protrude beyond the contour of the intermediate lever.
  • the lift cam does not need to be split and can counter full width.
  • the protection of the invention also relates to intermediate lever, in which only a total of a support or counter-rotating roller is applied.
  • FIG. 1 is a perspective view of a first variant of an intermediate lever
  • FIG. 2 shows a central longitudinal section through a second variant of an intermediate lever.
  • FIG. 1 Shown in Fig. 1 as a closed block present intermediate lever 1 for a fully variable valve train of an internal combustion engine for throttle-free load control.
  • the intermediate lever 1 is punched out of a sheet metal blank or a sheet metal strip.
  • the intermediate lever 1 according to FIG. 1 has two support rollers 4 running on an end face 2 on an axle 3 for a counter-rotation on a slide track (see, eg, FIG. 6 of DE 10 2006 018 512 A1).
  • the axis 3 is received in the intermediate lever 1 via a rolling bearing 13.
  • the support rollers 4 include a contact surface 5 for a cam.
  • the contact surface 5 is formed as a cylinder-segment-like bulge of the material of the intermediate lever 1 at the one end face 2, wherein the bulge protrudes radially beyond an outer shell 12 of the support rollers 4.
  • two counter-rotating rollers 8, which are flanking and positioned on a further axis 7, are arranged for a lifting cam.
  • the axis 7 passes over a rolling bearing 14 in the intermediate lever 1, wherein the two-sided counter-rotating rollers 8 are pressed onto the axis 7.
  • the external support rollers 4 serve to start up a cam (see also FIG. 4 of DE 10 2008 018 512 A1). They include a contact surface 5 for contact of a slide track. The latter, central contact surface 5 is again formed as a cylinder-segment-like bulge of the material of the intermediate lever 1 at the one end face 2, wherein this bulge is surmounted by the support rollers 4.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Transmission Devices (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

Levier intermédiaire (1) pour un mécanisme de distribution variable d'un moteur à combustion interne, comportant deux rouleaux d'appui (4) évoluant sur un axe (3) à une extrémité frontale (2) pour une rotation antagoniste sur une voie de coulisse, ces rouleaux d'appui (4) étant situés de part et d'autre d'une surface de butée (5) pour une came. Dans une partie médiane (6) du levier intermédiaire (1) sont montés deux rouleaux antagonistes (8) sur un autre axe (7) pour une came de levée. L'autre extrémité frontale (9) présente une surface (10) pour la transmission variable d'une course de la came de levée avec prise d'un élément suivant. Sur chaque paroi externe (11) du levier intermédiaire (1) se trouvent un rouleau antagoniste et un rouleau d'appui (8,4) et le levier intermédiaire (1) se présente sous forme d'un bloc au moins sensiblement fermé, vu à partir de son contour externe.
PCT/EP2011/070190 2011-02-10 2011-11-16 Levier intermédiaire WO2012107121A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201180065682.9A CN103328777B (zh) 2011-02-10 2011-11-16 中间杆

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011003900.7 2011-02-10
DE102011003900A DE102011003900A1 (de) 2011-02-10 2011-02-10 Zwischenhebel

Publications (1)

Publication Number Publication Date
WO2012107121A1 true WO2012107121A1 (fr) 2012-08-16

Family

ID=45023823

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/070190 WO2012107121A1 (fr) 2011-02-10 2011-11-16 Levier intermédiaire

Country Status (3)

Country Link
CN (1) CN103328777B (fr)
DE (1) DE102011003900A1 (fr)
WO (1) WO2012107121A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012222373A1 (de) * 2012-12-06 2014-06-12 Schaeffler Technologies Gmbh & Co. Kg Zwischenhebel
DE102014206314A1 (de) 2014-04-02 2015-10-08 Schaeffler Technologies AG & Co. KG Verfahren zur Herstellung eines Zwischenhebels
DE102015118884A1 (de) * 2015-11-04 2017-05-04 Pierburg Gmbh Mechanisch steuerbarer Ventiltrieb
DE102016220394B3 (de) * 2016-10-18 2017-12-28 Schaeffler Technologies AG & Co. KG Zwischenhebel eines variablen Ventiltriebs
CN109268576A (zh) * 2017-07-18 2019-01-25 无锡市德美嘉机械科技有限公司 可换式变量阀芯导轨结构
CN109882260A (zh) * 2018-12-18 2019-06-14 舍弗勒技术股份两合公司 中间杠杆，中间杠杆壳体及其制造方法
DE102020121201A1 (de) 2020-08-12 2022-02-17 Schaeffler Technologies AG & Co. KG Zwischenhebel für einen hubvariablen Ventiltrieb einer Brennkraftmaschine
DE102020125002A1 (de) 2020-09-25 2022-03-31 Schaeffler Technologies AG & Co. KG Baugruppe für einen hubvariablen Ventiltrieb einer Brennkraftmaschine mit zwei Zwischenhebeln und einem Träger hierfür
DE102020125001A1 (de) 2020-09-25 2022-03-31 Schaeffler Technologies AG & Co. KG Zwischenhebel für einen hubvariablen Ventiltrieb einer Brennkraftmaschine

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06101424A (ja) * 1992-09-21 1994-04-12 Koyo Seiko Co Ltd カムフォロワ装置
JP2003161124A (ja) * 2001-11-22 2003-06-06 Ntn Corp ロッカーアーム
EP1387048A2 (fr) * 2002-08-02 2004-02-04 Bayerische Motoren Werke Aktiengesellschaft Levier oscillant pour commande de soupape à course variable
DE10235402A1 (de) * 2002-08-02 2004-02-12 Bayerische Motoren Werke Ag Schwenkhebel für einen hubvariablen Ventiltrieb
DE10260557A1 (de) * 2002-12-21 2004-07-01 Ina-Schaeffler Kg Zwischenhebel für einen variablen Ventiltrieb einer Brennkraftmaschine
DE10330673A1 (de) * 2002-08-02 2005-02-03 Bayerische Motoren Werke Ag Schwenkhebel für einen hubvariablen Ventiltrieb
DE102004049538A1 (de) * 2004-10-10 2006-04-13 Rolf Jung Vollvariable Hubventilsteuerungen für Brennkraftmaschinen
US20070039573A1 (en) * 2005-08-04 2007-02-22 Timken Us Corporation Deactivating roller finger follower
DE102006018512A1 (de) 2006-04-21 2007-10-25 Schaeffler Kg Rollenelement für ein schwenkbewegliches Maschinenteil
DE102008018512A1 (de) 2008-04-12 2009-10-15 Fendt, Günter Fahrzeugführer-Assistenzsystem und dazugehöriges Verfahren

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005053596A1 (de) * 2005-11-10 2007-05-16 Schaeffler Kg Schaltbarer Schlepphebel eines Ventiltriebs einer Brennkraftmaschine

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06101424A (ja) * 1992-09-21 1994-04-12 Koyo Seiko Co Ltd カムフォロワ装置
JP2003161124A (ja) * 2001-11-22 2003-06-06 Ntn Corp ロッカーアーム
EP1387048A2 (fr) * 2002-08-02 2004-02-04 Bayerische Motoren Werke Aktiengesellschaft Levier oscillant pour commande de soupape à course variable
DE10235402A1 (de) * 2002-08-02 2004-02-12 Bayerische Motoren Werke Ag Schwenkhebel für einen hubvariablen Ventiltrieb
DE10330673A1 (de) * 2002-08-02 2005-02-03 Bayerische Motoren Werke Ag Schwenkhebel für einen hubvariablen Ventiltrieb
DE10260557A1 (de) * 2002-12-21 2004-07-01 Ina-Schaeffler Kg Zwischenhebel für einen variablen Ventiltrieb einer Brennkraftmaschine
DE102004049538A1 (de) * 2004-10-10 2006-04-13 Rolf Jung Vollvariable Hubventilsteuerungen für Brennkraftmaschinen
US20070039573A1 (en) * 2005-08-04 2007-02-22 Timken Us Corporation Deactivating roller finger follower
DE102006018512A1 (de) 2006-04-21 2007-10-25 Schaeffler Kg Rollenelement für ein schwenkbewegliches Maschinenteil
DE102008018512A1 (de) 2008-04-12 2009-10-15 Fendt, Günter Fahrzeugführer-Assistenzsystem und dazugehöriges Verfahren

Also Published As

Publication number Publication date
CN103328777B (zh) 2015-12-09
CN103328777A (zh) 2013-09-25
DE102011003900A1 (de) 2012-08-16

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