EP1848878A1 - Basculeur commutable d'un mecanisme de distribution d'un moteur a combustion interne - Google Patents

Basculeur commutable d'un mecanisme de distribution d'un moteur a combustion interne

Info

Publication number
EP1848878A1
EP1848878A1 EP06706392A EP06706392A EP1848878A1 EP 1848878 A1 EP1848878 A1 EP 1848878A1 EP 06706392 A EP06706392 A EP 06706392A EP 06706392 A EP06706392 A EP 06706392A EP 1848878 A1 EP1848878 A1 EP 1848878A1
Authority
EP
European Patent Office
Prior art keywords
lever
piston
coupling
profiling
rocker arm
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.)
Granted
Application number
EP06706392A
Other languages
German (de)
English (en)
Other versions
EP1848878B1 (fr
Inventor
Joachim Seitz
Bodo RÖRIG
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schaeffler Technologies AG and Co KG
Original Assignee
Schaeffler 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 KG filed Critical Schaeffler KG
Publication of EP1848878A1 publication Critical patent/EP1848878A1/fr
Application granted granted Critical
Publication of EP1848878B1 publication Critical patent/EP1848878B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2101—Cams
    • Y10T74/2107—Follower

Definitions

  • the invention relates to a rocker arm of a valve train of an internal combustion engine, the venti I switchable to different strokes for at least one gas exchange, with an outer and extending between the arms and pivotable relative to this inner lever, wherein at one end of the lever extending bore in the longitudinal direction with a piston is applied, which piston is slidable with its upper side partially under a driver surface of one end of the other lever, so that in this coupling a large and decoupling a small or 0-valve lift is generated, wherein on at least one of the underside of the drag lever, a system for a gas exchange valve and other surfaces, a complementary surface for a support element is applied, and wherein at least the lever swinging down in the decoupling case can be acted upon by at least one large lift cam on its upper side.
  • a generic drag lever is disclosed in DE 103 18 295 A1. Its piston as a coupling means extends in a bore at one end of the inner element and can be partially inserted for the coupling case under a speaking complementarily trained driving surface of a crossbar of the outer lever to be displaced.
  • edge carriers may occur during the operation of the cam follower in the coupling case. These are undesirable and are due, in particular, to an input or output Due to these increased and undesirable contact pressures, an impact may occur in the coupling region, which in turn increases the play of the coupling, but this clearance must be kept within narrow tolerances in order to function properly Under certain circumstances, because of the abovementioned "edge bearer", chips can also be removed, which can lead to jamming of the respective piston.
  • the object of the invention is therefore to provide a switchable drag lever of the aforementioned type, in which the disadvantageous "edge support" are eliminated by simple means.
  • this object is achieved in that the piston is provided in its coupling region, as well as starting from its lying in the coupling direction, either with a rising, radii-like profiling or with a sloping, radii profiling, the driver surface of the other lever follows the profiling cone-like and wherein in coupling a contact point of the piston is located on the driving surface in the region of half the depth of the driving surface.
  • this object is achieved by the features of the independent claim 2, according to which the piston is shown smooth cylindrical, wherein at coupling whose contact point on the driver surface is in the region of half the depth of the driver surface and wherein the driver surface, starting from the contact point, on both sides with a sloping, radiographic profiling is provided.
  • a contact point of the piston on the driver surface should lie approximately in the region of half the depth of the driver surface
  • the scope of the invention includes a solution in which the aforementioned contact point is at least not to be found in the region of the edges of the complementary surface at its ends.
  • the proposed radius profiling on the piston can be generated for example by sliding or belt grinding.
  • driver surface is the subject of another subclaim. Accordingly, it should be represented, for example, as an indentation on an underside of a crossbeam of the respective other lever, for example the outer lever. However, it is also conceivable and intended to represent the driver surface as part of a bore of a crossbar of the other lever.
  • the bore with the piston in the inner lever above a formed, for example, as a kiefer-shaped indentation complementary surface for the support element to arrange and thus shift the piston for its coupling case longitudinally outwards under the corresponding cam surface.
  • Figure 1 The drag lever according to the invention in partial longitudinal section with enlarged illustrated coupling region and the
  • Figures 2, 3 variants of the profiling of the piston as a coupling agent.
  • Figure 1 discloses a switchable rocker arm 1, as it is described by its basic structure in the aforementioned DE 103 18 295 A1.
  • U.S. Pat. 5,544,626 called, but in which the piston extends in a bore of the outer lever.
  • the drag lever 1 consists of an outer lever 2, between the arms, not shown, which is shown here only in the region of its one end 4 inner lever 3 is added.
  • the arms of the outer lever 2 are in the rich of its one end 8 connected by a transom 17. It can also be seen that in the region of the end 4 of the inner lever 3, on the underside 9, a dome-shaped complementary surface 11 is applied. This serves to support the inner and thus the entire drag lever 3, 1 on a head of a support member not shown in the drawing.
  • the coupling region of the piston 6 is shown pulled out enlarged.
  • a smooth cylindrical piston 6 is present.
  • the condition at coupling can be recognized.
  • the driving surface 7, starting from the contact point K, on both sides with a sloping, radii profiling 15 is provided.
  • the contact point K is approximately in the range of half a depth or here at half the thickness of the crossbar 17 of the driver surface 7. Due to this profiling according to the invention is no longer in coupling to the aforementioned, adverse "edge beams".
  • FIG. 3 shows a profiling that proceeds differently from FIG. 2.
  • the piston 6 has on its outer shell, starting from its outer forehead 12, an ascending, radii-like profiling 13. This, in turn, lies opposite the conical surface 7 following the conical surface.
  • the term "half depth" is based on the insertion region of the piston 6 in coupling.

Landscapes

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

Abstract

L'invention concerne un basculeur commutable (1) d'un mécanisme de distribution d'un moteur à combustion interne, dont le basculeur intérieur (3) comporte sur une extrémité un piston coulissant (6) servant d'élément de couplage. Ledit piston peut partiellement être amené en prise avec une surface d'entraînement (7) d'un basculeur extérieur pourvu d'un profilage radial (13) ascendant dans sa zone de couplage et à partir de son front (12) situé dans la direction de couplage. La surface d'entraînement (7) du basculeur extérieur (2) présente également une forme conique suivant le profilage (13). En cas de couplage, un point de contact (K) du piston (6) est situé sur la surface d'entraînement (7), au niveau de la moitié de la profondeur de celle-ci. On évite ainsi que des arêtes ne se forment lors du couplage.
EP06706392.5A 2005-02-16 2006-01-25 Basculeur commutable d'un mecanisme de distribution d'un moteur a combustion interne Not-in-force EP1848878B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005006954A DE102005006954A1 (de) 2005-02-16 2005-02-16 Schaltbarer Schlepphebel eines Ventiltriebs einer Brennkraftmaschine
PCT/EP2006/000621 WO2006087076A1 (fr) 2005-02-16 2006-01-25 Basculeur commutable d'un mecanisme de distribution d'un moteur a combustion interne

Publications (2)

Publication Number Publication Date
EP1848878A1 true EP1848878A1 (fr) 2007-10-31
EP1848878B1 EP1848878B1 (fr) 2013-04-17

Family

ID=36096346

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06706392.5A Not-in-force EP1848878B1 (fr) 2005-02-16 2006-01-25 Basculeur commutable d'un mecanisme de distribution d'un moteur a combustion interne

Country Status (4)

Country Link
US (1) US7503300B2 (fr)
EP (1) EP1848878B1 (fr)
DE (1) DE102005006954A1 (fr)
WO (1) WO2006087076A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD833482S1 (en) 2015-07-13 2018-11-13 Eaton Corporation Rocker arm
USD791190S1 (en) 2015-07-13 2017-07-04 Eaton Corporation Rocker arm assembly
USD830414S1 (en) 2015-12-10 2018-10-09 Eaton S.R.L. Roller rocker arm of an engine
US10753237B2 (en) * 2018-05-29 2020-08-25 Schaeffler Technologies AG & Co. KG Actuation arrangement for switchable lever
DE102022116589A1 (de) 2022-07-04 2024-01-04 Schaeffler Technologies AG & Co. KG Anordnung zum Koppeln von beweglich zueinander angeordneten Bauteilen für eine schaltbare Ventiltriebkomponente einer Brennkraftmaschine

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5544626A (en) * 1995-03-09 1996-08-13 Ford Motor Company Finger follower rocker arm with engine valve deactivator
DE19630309C2 (de) 1996-07-06 2001-10-11 Meta Motoren Energietech Vorrichtung zum Unterbrechen des Kraftflusses zwischen einer Nockenwelle und mindestens einem Ventil
DE10038917A1 (de) * 2000-08-09 2002-02-21 Fev Motorentech Gmbh Kolbenbrennkraftmaschine mit deaktivierbaren, mechanisch betätigbaren Gaswechselventilen
US6805083B2 (en) * 2002-10-10 2004-10-19 Ford Global Technologies, Llc Cam cover gasket
DE10310220A1 (de) * 2003-03-08 2004-09-16 Daimlerchrysler Ag Vorrichtung zur Koppelung bzw. Entkoppelung zweier Betätigungshebel eines Ventiltriebes einer Brennkraftmaschine und Verfahren hierzu
DE102004007766A1 (de) 2003-03-20 2004-09-30 Ina-Schaeffler Kg Schlepphebel eines Ventiltriebs einer Brennkraftmaschine
DE10318295A1 (de) * 2003-04-23 2004-11-11 Ina-Schaeffler Kg Schlepphebel eines Ventiltriebs einer Brennkraftmaschine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006087076A1 *

Also Published As

Publication number Publication date
US7503300B2 (en) 2009-03-17
WO2006087076A1 (fr) 2006-08-24
DE102005006954A1 (de) 2006-08-17
US20080264368A1 (en) 2008-10-30
EP1848878B1 (fr) 2013-04-17

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