EP2929153A1 - Intermediate lever - Google Patents
Intermediate leverInfo
- Publication number
- EP2929153A1 EP2929153A1 EP13805748.4A EP13805748A EP2929153A1 EP 2929153 A1 EP2929153 A1 EP 2929153A1 EP 13805748 A EP13805748 A EP 13805748A EP 2929153 A1 EP2929153 A1 EP 2929153A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- intermediate lever
- component
- cam
- face
- lever
- 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
- 238000002485 combustion reaction Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 6
- 210000002105 tongue Anatomy 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000000295 complement effect Effects 0.000 claims description 3
- 238000005452 bending Methods 0.000 claims description 2
- 238000005266 casting Methods 0.000 claims description 2
- 210000001061 forehead Anatomy 0.000 claims description 2
- 238000005242 forging Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 238000005245 sintering Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 claims 1
- 238000001746 injection moulding Methods 0.000 claims 1
- 238000003801 milling Methods 0.000 claims 1
- 239000000843 powder Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000013011 mating Effects 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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
- F01L13/0015—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
- F01L2001/187—Clips, e.g. for retaining rocker arm on pivot
-
- 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
- F01L2001/467—Lost motion springs
-
- 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
Definitions
- the invention relates to an intermediate lever for a variable-stroke valve drive of an internal combustion engine, which is present as a closed flat block, with a front end on the one hand applied support surface for a slide track and on the other hand, a contact surface for a cam, wherein in a center portion of the intermediate lever, a mating surface for a lift cam is formed as well as on a further front end of the intermediate lever lever pivoting on both sides projecting extensions whose common bottom is used for variable transmission of a stroke of the lifting cam on a tap of a follower member, wherein an end face of one of the extensions as an attachment for an end of the insects- acted upon Cam return spring is provided and projecting from this end face two tabs for lateral guidance of the cam return spring.
- the task is to create an intermediate lever without the mentioned disadvantages.
- this object is achieved in that the tabs are part of a separately connected to the intermediate lever at its further front end bow-like component.
- the proposed intermediate lever can u. a. 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".
- the intermediate lever is simply stamped out of a sheet metal blank whose thickness preferably has the width of the intermediate lever, or produced in a forging process.
- it may also be, as shown in a dependent claim, machined or at least machined or represented by casting / sintering. MIM training or embossing / extrusion is also possible.
- the intermediate lever is present as a simple block.
- block-like intermediate lever only has to be essentially closed. He may also be perforated or have beads or raised areas. It is also conceivable and provided that there is only one or no extension at the other end, so that the bottom for variable stroke transmission may possibly be only the lower end of the intermediate lever.
- the bracket-like component on which the lateral guidance of the cam return spring (lost-motion spring) is now realized via its plate pieces can be produced, for example, in a simple stamping and bending process from sheet metal. Possibly. However, it is also the Volinnaterial tone cast or the. Like. Conceivable and intended. Also, depending on a separate plate piece may be attached to a longitudinal wall of the intermediate lever, wherein the plate pieces are not connected via a cross bar o.
- the actual contact area of the cam return spring is maintained at the intermediate lever.
- the clamp saves this area of the plant.
- the support or abutment surface of the intermediate lever at the first front end or its vicinity may be present as at least one roller or sliding surface. The same applies to the cam counterface.
- the component can be connected to the intermediate lever in a stationary manner solely via its transverse bar.
- the component bspw. Other places to jam / verklipsen or via a caulking, welding, press connection o. The like.
- the component as listed in concretization of the invention, one or more according to "inside”, ie in the lever direction, projecting nose-like projections, which sit for fastening purpose in complementary recesses of the intermediate lever.
- FIG. 1 is a perspective view of an intermediate lever
- FIG. 2 shows an enlarged detail view of the intermediate lever according to FIG. 1 in the region of its further front end
- FIG. 3 shows the clamp-like component with transverse bars and spring tongues according to FIG. 2 as a detail
- FIG. 4 shows a view like FIG. 2, but with an alternative component
- FIG. 5 shows the component according to FIG. 4 as a detail.
- Figure 1 discloses an intermediate lever 1 for a variable-stroke valve drive of an internal combustion engine. This is available as a closed flat block, which is obtained by a simple punching process from a sheet metal blank.
- the intermediate lever 1 has at a first end face 2 a central, designed as a sliding surface contact surface 4 for a cam.
- the contact surface 4 is flanked on both sides by a support surface 3 designed as a roller for a slide track.
- the position of the sliding and support surface can possibly also be reversed. This also applies to the Abgriffsart (sliding or Wälzabgriff), whereby a complete Gleitabgriff or a complete rolling bearing come into question.
- the intermediate lever 1 has a counter-rotating surface 6 designed as a double roller for a lifting cam.
- protruding extensions 8, 9 are formed in Hebelverschwenkraum.
- Their common bottom 10 which consists of a zero-stroke and a right-connected lifting area here on the left, is used for the variable transmission of a stroke of the lifting cam to a tap of a finger lever as a follower.
- An end face 1 1 of the extension 8 is provided as an abutment for one end of the intermediate lever 1 acting, not shown cam return spring. From this end face 1 1 are two tabs 12 for lateral guidance of the cam return spring, which are part of a connected to the intermediate lever 1 at the other end face 7, bow-shaped member 13 made of sheet metal.
- the latter component 13 has two tabs 12 having plate pieces 14. Each of these is located on a longitudinal wall 15 of the intermediate lever 1 at. It can be seen in FIGS. 1, 2 and 4, that the component 1, the one end face 1 1 spared, so that the cam return spring rests on the material of the intermediate lever 1.
- each plate piece 14 of the component 13 has a nose-like projection 23 protruding inward on its end 21 facing away from its tongue 12 in the lever pivoting direction. This sits in a complementary, only hinted here recess 24 of the corresponding Longitudinal wall 15 of the intermediate lever. 1 As a result, the component 13 is in turn fixed to the intermediate lever 1.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102012222373.8A DE102012222373A1 (en) | 2012-12-06 | 2012-12-06 | intermediate lever |
PCT/DE2013/200211 WO2014086347A1 (en) | 2012-12-06 | 2013-10-10 | Intermediate lever |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2929153A1 true EP2929153A1 (en) | 2015-10-14 |
Family
ID=49765749
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13805748.4A Ceased EP2929153A1 (en) | 2012-12-06 | 2013-10-10 | Intermediate lever |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2929153A1 (en) |
CN (1) | CN104884751A (en) |
DE (1) | DE102012222373A1 (en) |
WO (1) | WO2014086347A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102018131553A1 (en) | 2018-12-10 | 2020-06-10 | Schaeffler Technologies AG & Co. KG | Intermediate lever of a variable valve train |
DE102018132562A1 (en) | 2018-12-18 | 2020-06-18 | Schaeffler Technologies AG & Co. KG | Intermediate lever of a variable valve train |
DE102018132561A1 (en) | 2018-12-18 | 2020-06-18 | Schaeffler Technologies AG & Co. KG | Intermediate lever of a variable valve train |
DE102020125001A1 (en) | 2020-09-25 | 2022-03-31 | Schaeffler Technologies AG & Co. KG | Intermediate lever for a variable-stroke valve drive of an internal combustion engine |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1925772A1 (en) * | 1969-05-21 | 1970-11-26 | Ford Werke Ag | Rocker and rocker arm guide for combustion engines |
US6470842B2 (en) * | 2000-10-12 | 2002-10-29 | Ina Walzlager Schaeffler Ohg | Lever-type cam follower |
DE10260557A1 (en) * | 2002-12-21 | 2004-07-01 | Ina-Schaeffler Kg | Intermediate lever for a variable valve train of an internal combustion engine |
JP2007170261A (en) * | 2005-12-21 | 2007-07-05 | Otics Corp | Rocker arm |
DE102010018712B4 (en) * | 2010-04-29 | 2022-01-20 | Audi Ag | Valve drive for a gas exchange valve with rolling contact between cam follower and valve stem |
DE102011003900A1 (en) | 2011-02-10 | 2012-08-16 | Schaeffler Technologies Gmbh & Co. Kg | intermediate lever |
DE102011075236A1 (en) * | 2011-05-04 | 2012-11-08 | Schaeffler Technologies AG & Co. KG | intermediate lever |
-
2012
- 2012-12-06 DE DE102012222373.8A patent/DE102012222373A1/en not_active Withdrawn
-
2013
- 2013-10-10 CN CN201380063579.XA patent/CN104884751A/en active Pending
- 2013-10-10 EP EP13805748.4A patent/EP2929153A1/en not_active Ceased
- 2013-10-10 WO PCT/DE2013/200211 patent/WO2014086347A1/en active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2014086347A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102012222373A1 (en) | 2014-06-12 |
CN104884751A (en) | 2015-09-02 |
WO2014086347A1 (en) | 2014-06-12 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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17P | Request for examination filed |
Effective date: 20150706 |
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AX | Request for extension of the european patent |
Extension state: BA ME |
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DAX | Request for extension of the european patent (deleted) | ||
17Q | First examination report despatched |
Effective date: 20160418 |
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REG | Reference to a national code |
Ref country code: DE Ref legal event code: R003 |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED |
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18R | Application refused |
Effective date: 20160707 |
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P01 | Opt-out of the competence of the unified patent court (upc) registered |
Effective date: 20230522 |