EP2013450A1 - Basculeur commutable d'un mécanisme de distribution d'un moteur à combustion interne - Google Patents

Basculeur commutable d'un mécanisme de distribution d'un moteur à combustion interne

Info

Publication number
EP2013450A1
EP2013450A1 EP07727963A EP07727963A EP2013450A1 EP 2013450 A1 EP2013450 A1 EP 2013450A1 EP 07727963 A EP07727963 A EP 07727963A EP 07727963 A EP07727963 A EP 07727963A EP 2013450 A1 EP2013450 A1 EP 2013450A1
Authority
EP
European Patent Office
Prior art keywords
lever
valve
arms
drag
gas exchange
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
EP07727963A
Other languages
German (de)
English (en)
Other versions
EP2013450B1 (fr
Inventor
Debora Manther
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 EP2013450A1 publication Critical patent/EP2013450A1/fr
Application granted granted Critical
Publication of EP2013450B1 publication Critical patent/EP2013450B1/fr
Expired - Fee Related 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
    • 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

Definitions

  • the invention relates to a switchable rocker arm of a valve train of an internal combustion engine, with an outer lever which includes an inner lever with its arms, which components pivot relative to each other on a common axis applied to a valve end and the inner lever at a bottom at the valve end Plant for a gas exchange valve and at the other end has a complementary surface for storage on a head of a support element, wherein the outer and inner levers are selectively connectable via coupling means to achieve a large valve lift, wherein when decoupling a small or O-valve stroke can be displayed, at least the outer lever has on its upper side at least one contact surface for a lifting cam and wherein the system is bounded laterally by two projecting from the cam follower in the valve direction guide plates for the gas exchange valve.
  • the object of the invention is therefore to provide a switchable drag lever of the aforementioned type, in which the cited disadvantages are eliminated.
  • the guide tabs emanate from the underside of the outer lever.
  • these tabs should be integrally formed with the inner lever and their outer sides are aligned with outer surfaces of the arms of the outer lever.
  • the guide tabs may be formed on the outer lever as separate components and connected by a suitable connection method such as welding, joining, etc. with the outer lever.
  • the inner lever and thus the entire drag lever can be made narrower at least at the valve end.
  • less space is required, so that a subsequent installation in cramped cylinder head concepts is possible.
  • the total mass of the tow hebeis can be lowered.
  • the moment of inertia is reduced compared to previous versions. Since the elimination of the guide tabs on the inner lever, the system for the gas exchange valve is virtually "open", a processing of this area is much easier.
  • lever parts can be produced by punching and bending, for example, from sheet steel / steel strip, wherein the projecting guide straps can be punched out or bent in one operation.
  • the axis with stumps at both ends protrudes beyond the outer surfaces of the arms of the outer lever and that precisely at this projecting area at least one Lost Motion spring as a torsion leg spring in per se known Way is applied.
  • This may be another contribution towards “narrowing" the rocker arm on its valve side (as compared to incorporating the lost-motion springs about the axis between outer surfaces of the inner lever and inner sides of the arms of the outer lever or generally within the arms of the outer lever ).
  • the contact surfaces for the Quhubnocken on the outer lever are designed as projecting from the upper sides outwardly projecting collar, which thus represent a sliding surface as a contact partner.
  • a roll can be applied here in each case.
  • the inner lever may have a role as a contact surface.
  • a sliding surface can also be applied here.
  • outer lever box-like so that it is connected by a respective double-ended crossbar.
  • This training has advantages in terms of stiffness and stability of the outer lever.
  • the arms of the outer lever are connected in the region of the other end (support element side) by a cross bar, this can be under the handles for the coupling case of a longitudinally extending from the inner lever slide as a coupling means.
  • This slide extends above the complementary surface of the inner lever for the Ab micle- ment.
  • the rocker arms parts or at least one of the arms (possibly except for an insert with the complementary surface) of the drag lever can also be made by casting.
  • a lightweight material such as plastic, which is optionally fiber or particle reinforced.
  • a particularly narrow-built rocker arm is present when dispensed to the aforementioned collar, which protrude from the top of the arms, and thus only the width of the top of the arms is used as a cam contact surface.
  • Figure 2 shows the drag lever of Figure 1, partially cut and from another perspective.
  • a switchable drag lever 1 of a valve train of an internal combustion engine This consists of a box-like outer lever 2 with two arms 3.
  • the arms 3 are connected at a valve-side end 5 and at an opposite other end 9 by a respective cross bow 17, 18.
  • the outer lever 2 includes an inner lever 4, wherein both levers 2, 4 are pivotally movable relative to each other. For this purpose, they run on an axis 6, which is applied approximately in the area above a gas exchange valve 8a.
  • the axis 6 projects beyond a respective stump 15 outer surfaces 14 of the arms 3 of the outer lever 2. Exactly in this area, each stump 15 can be surrounded by a rotary leg spring o. The like.
  • a lost motion spring in a conventional manner ,
  • the inner lever 4 has in the region of the valve-side end 5 on a lower side 7 a system 8 for the gas exchange valve 8a.
  • a dome-shaped here complementary surface 10 for storage on a head of a support element.
  • This complementary surface 10 may be provided in the inner lever 4 is a hydraulically displaceable in at least one direction slide as coupling means.
  • the inner lever 4 has a roller as a contact surface 19 for a low-lift cam. This is flanked on both sides by sliding surfaces as contact surfaces 1 1 on tops 10a of the arms 3 of the outer lever 2.
  • the contact surfaces 1 1 are formed as outwardly projecting, thin-walled longitudinal collar, which are preferably integrally connected to the outer lever 2. Run against these contact surfaces 1 1 respectively adjhubnocken.
  • the outer surfaces 14 of the arms 3 of the outer lever 2 are stepped. In the area of the valve-side end 5, they have their smallest thickness. Behind the axis 6, viewed in the direction of the other end 9, the outer surfaces 14 thicken each via a step 16. As shown in more detail in FIG. 2, the respective step 16 encloses the corresponding stump 15 in a half-shell-like manner at a small distance.

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

La présente invention concerne un basculeur commutable (1) d'un mécanisme de distribution d'un moteur à combustion interne, avec un levier externe (2), qui entoure de ses bras (3) un levier interne (4), lesquels composants (2, 4) s'étendent de manière pivotante l'un par rapport à l'autre sur un axe commun (6) appliqué à une extrémité (5) du côté de la soupape et le levier interne (4) présente, sur une face inférieure (7) sur l'extrémité (5) du côté de la soupape, un dispositif (8) pour une soupape d'échange des gaz (8a) ainsi que sur l'autre extrémité (9) une surface complémentaire (10) en vue de s'appuyer sur la tête d'un élément d'appui. Des brides de guidage (12) pour la soupape d'échange des gaz (8a) font saillie depuis la face inférieure (7) du levier externe (2). Le basculeur (1) peut donc être nettement plus étroit au moins du côté de la soupape. Par ailleurs, l'usinage du dispositif (8) pour la soupape d'échange des gaz (8a) est simplifié sur le levier interne (4).
EP07727963.6A 2006-04-21 2007-04-11 Basculeur commutable d'un mécanisme de distribution d'un moteur à combustion interne Expired - Fee Related EP2013450B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US74531706P 2006-04-21 2006-04-21
PCT/EP2007/053495 WO2007122105A1 (fr) 2006-04-21 2007-04-11 Basculeur commutable d'un mécanisme de distribution d'un moteur à combustion interne

Publications (2)

Publication Number Publication Date
EP2013450A1 true EP2013450A1 (fr) 2009-01-14
EP2013450B1 EP2013450B1 (fr) 2013-06-19

Family

ID=38222161

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07727963.6A Expired - Fee Related EP2013450B1 (fr) 2006-04-21 2007-04-11 Basculeur commutable d'un mécanisme de distribution d'un moteur à combustion interne

Country Status (3)

Country Link
US (1) US8132551B2 (fr)
EP (1) EP2013450B1 (fr)
WO (1) WO2007122105A1 (fr)

Families Citing this family (21)

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Publication number Priority date Publication date Assignee Title
US20190309663A9 (en) 2008-07-22 2019-10-10 Eaton Corporation Development of a switching roller finger follower for cylinder deactivation in internal combustion engines
US9581058B2 (en) 2010-08-13 2017-02-28 Eaton Corporation Development of a switching roller finger follower for cylinder deactivation in internal combustion engines
US9708942B2 (en) 2010-03-19 2017-07-18 Eaton Corporation Rocker arm assembly and components therefor
US9938865B2 (en) 2008-07-22 2018-04-10 Eaton Corporation Development of a switching roller finger follower for cylinder deactivation in internal combustion engines
US9228454B2 (en) 2010-03-19 2016-01-05 Eaton Coporation Systems, methods and devices for rocker arm position sensing
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
US8434440B2 (en) * 2009-06-01 2013-05-07 Schaeffler Technologies AG & Co. KG Switchable finger lever
US11181013B2 (en) 2009-07-22 2021-11-23 Eaton Intelligent Power Limited Cylinder head arrangement for variable valve actuation rocker arm assemblies
US10087790B2 (en) 2009-07-22 2018-10-02 Eaton Corporation Cylinder head arrangement for variable valve actuation rocker arm assemblies
US9194261B2 (en) 2011-03-18 2015-11-24 Eaton Corporation Custom VVA rocker arms for left hand and right hand orientations
US8733311B2 (en) * 2010-02-12 2014-05-27 Schaeffler Technologies AG & Co. KG Switchable roller finger follower
DE102010010733A1 (de) * 2010-03-09 2011-09-15 Schaeffler Technologies Gmbh & Co. Kg Schaltbarer Schlepphebel
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
US8286600B2 (en) * 2010-03-22 2012-10-16 GM Global Technology Operations LLC Engine having variable lift valvetrain
US8286599B2 (en) * 2010-03-22 2012-10-16 GM Global Technology Operations LLC Engine having variable lift valvetrain
US8584630B2 (en) * 2010-03-30 2013-11-19 Schaeffler Technologies AG & Co. KG Switchable roller finger follower assembly
US8627796B2 (en) * 2011-04-21 2014-01-14 Eaton Corporation Pivot foot for deactivating rocker arm
US20130186358A1 (en) * 2012-01-23 2013-07-25 Schaeffler Technologies AG & Co. KG Roller finger follower with swivelable valve pallet
CN105121090A (zh) 2014-03-03 2015-12-02 伊顿公司 气门致动装置及其制造方法
EP3250794A4 (fr) * 2015-01-28 2018-10-03 Eaton Corporation Ensemble soupape de changement de vitesse à came axiale avec événement de soupape séparé supplémentaire

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US5544626A (en) * 1995-03-09 1996-08-13 Ford Motor Company Finger follower rocker arm with engine valve deactivator
US5615647A (en) * 1995-03-28 1997-04-01 Eaton Corporation Latch assembly for a valve control system
US6591798B2 (en) * 2001-12-17 2003-07-15 Delphi Technologies, Inc. Variable valve actuation assembly for an internal combustion engine
US6668779B2 (en) 2002-05-08 2003-12-30 Delphi Technologies, Inc. Two-step finger follower rocker arm assembly
DE10220904B4 (de) * 2002-05-10 2005-04-07 Meta Motoren- Und Energie-Technik Gmbh Vorrichtung zum Verstellen des Hubs eines von einer Nockenwelle betätigten Ventils
DE10257705A1 (de) * 2002-12-11 2004-06-24 Ina-Schaeffler Kg Schlepphebel eines Ventiltriebs einer Brennkraftmaschine
DE10318295A1 (de) * 2003-04-23 2004-11-11 Ina-Schaeffler Kg Schlepphebel eines Ventiltriebs einer Brennkraftmaschine
DE102004029555A1 (de) * 2004-06-18 2006-01-05 Ina-Schaeffler Kg Schaltbarer Schlepphebel eines Ventiltriebs einer Brennkraftmaschine
US6925978B1 (en) 2004-08-24 2005-08-09 Delphi Technologies, Inc. Two-step roller finger cam follower having angled lock pin
US7308872B2 (en) * 2004-12-30 2007-12-18 Delphi Technologies, Inc. Method and apparatus for optimized combustion in an internal combustion engine utilizing homogeneous charge compression ignition and variable valve actuation
US7484487B2 (en) * 2005-11-21 2009-02-03 Eaton Corporation Dual lift rocker arm latch mechanism and actuation arrangement therefor
US20070113813A1 (en) * 2005-11-21 2007-05-24 Lalone Barry G Two-step rocker arm having roller element cam followers

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See references of WO2007122105A1 *

Also Published As

Publication number Publication date
EP2013450B1 (fr) 2013-06-19
WO2007122105A1 (fr) 2007-11-01
US20090064954A1 (en) 2009-03-12
US8132551B2 (en) 2012-03-13

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