EP1915517B1 - Schaltbarer schlepphebel eines ventiltriebs einer brennkraftmaschine - Google Patents

Schaltbarer schlepphebel eines ventiltriebs einer brennkraftmaschine Download PDF

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Publication number
EP1915517B1
EP1915517B1 EP06818222A EP06818222A EP1915517B1 EP 1915517 B1 EP1915517 B1 EP 1915517B1 EP 06818222 A EP06818222 A EP 06818222A EP 06818222 A EP06818222 A EP 06818222A EP 1915517 B1 EP1915517 B1 EP 1915517B1
Authority
EP
European Patent Office
Prior art keywords
lever
drag
follower
pin
cam
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.)
Active
Application number
EP06818222A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1915517A1 (de
Inventor
Stefan Gemein
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.)
IHO Holding GmbH 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 EP1915517A1 publication Critical patent/EP1915517A1/de
Application granted granted Critical
Publication of EP1915517B1 publication Critical patent/EP1915517B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • 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
    • F01L1/26—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder
    • 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
    • F01L1/26—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder
    • F01L1/267—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder with means for varying the timing or the lift of the 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
    • F01L13/0005—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
    • 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
    • F01L2305/02—Mounting of rollers
    • 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
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20576—Elements
    • Y10T74/20882—Rocker arms

Definitions

  • the invention relates to a switchable rocker arm of a valve train of an internal combustion engine, with an outer and between the side walls arranged inner lever, which inner lever has a roller mounted on a pin as a mating surface for a lifting cam between his arms, the rocker arm on a bottom at one end a system for a gas exchange valve and at the other end a pivot bearing are immanent, wherein the levers extend at one of the ends on a common axis and at the end facing away from the axis longitudinally extending, in the cam base circle aligned receptacles, wherein in at least one of the receptacles a coupling means is arranged, which is for a coupling of the lever in sections displaceable in the opposite receptacle (see US-A-5 544 626 ).
  • a respective outer lever In order to represent an aligned position of receptacles for coupling means in the cam base circle in previously known from the prior art levers, a respective outer lever has a corresponding inner lever approximately in the region of a transverse center plane bow-like cross-stop. Due to the necessary transition radii of this bow-shaped stopper seen from the arms of the outer lever in the transverse direction, such a drag lever must build relatively wide, since the inner lever can not strike in the radius range on an upper side of the cross bar. However, should a stop occur in the area of the radii, an unnecessarily high material load is to be expected. Also, conditions may occur in which there is no sufficient alignment of the coupling means for opposing recording, so that a coupling can not be realized.
  • the object of the invention is therefore to provide a drag lever of the aforementioned type, in which the disadvantages listed are eliminated.
  • this object is achieved in that the bolt is "flying" mounted in the inner lever and slightly protrudes with one approach over the arms of the inner lever, wherein in the coupling case tops of the lugs abut surfaces of abutment surfaces, which are applied to inner surfaces of the side walls of the outer lever are.
  • the scope of this invention also relates to solutions to switchable drag levers in which a so-called "cross-lock” is applied.
  • the bolt for the role is therefore slightly wider than the inner lever designed so that the tops abut in a simple manner on the undersides of the stop surfaces in the coupling case.
  • an alignment of the images for the coupling means in the cam base circle is created.
  • a clearance of the mating surface of the inner lever in the cam base circle with respect to the cam can be realized on these stop measures.
  • fastening is meant an arrangement of the bolt in the corresponding receptacle in the inner lever, which dispenses with any attachment.
  • the bolt thus centered with its outer end faces on inner surfaces of the side walls of the outer lever itself.
  • undersides of the abutment surfaces which may possibly also be formed separately, realized complementary to tops of the bolts.
  • the stop surfaces protrude only slightly from the inner surfaces of the side walls of the outer lever inwards.
  • These can also be shown in one piece with mating surfaces for low-lift cams, which can be designed as sliding surfaces, so that there is a T or a T-like profile in cross-section in this region.
  • mating surfaces for low-lift cams which can be designed as sliding surfaces, so that there is a T or a T-like profile in cross-section in this region.
  • the proposed lost-motion spring is relatively compact.
  • a leg on a top of a crosspiece of the outer lever in the decoupling a "Ausfsch” created for the inner lever in the cylinder head direction, such that the bolt can not be lost.
  • the torsion spring as a lost-motion spring and possibly helical compression springs or the like can be used.
  • a pivot bearing for the drag lever is especially intended to a dome.
  • the drag lever can be mounted on a head of a hydraulic or mechanical support element. Possibly.
  • an arrangement of the finger lever on a pivot axis o. The like. Conceivable and provided.
  • a particularly expedient variant of a supply of hydraulic fluid to the finger lever for displacing the coupling means in at least one direction is present when the hydraulic fluid is passed via the head of the support member, the pivot bearing and a short hydraulic fluid channel directly into the receptacle for the coupling means.
  • the rocker arm can be present so that it is either mechanically locked or mechanically unlocked in the pressureless state.
  • rocker arm according to the invention may be provided on the rocker arm according to the invention also further biasing means for the at least one piston as coupling means, such as a hydraulic on both sides, an electromagnetic, a magnetic and the like.
  • the figures disclose a switchable drag lever 1 for a valve train of an internal combustion engine.
  • This has an outer lever 3.
  • an inner lever 4 is mounted between side walls 2 of the outer lever 3.
  • This has two spaced arms 7, between which runs a role as mating surface 6 for a Qurexinsky Ratio's Law
  • This role is here stored on rolling elements on a bolt 5, the "flying", therefore not fixed, runs in the inner lever 4.
  • the outer lever 3 has at one end 11 on an underside 8 designed as a dome pivot bearing 12. About this he is on a head of an example hydraulic support pivotally mounted. At the other end 9, the outer lever 3 on the underside 8 has a transverse web 25 with a system 10 for a gas exchange valve. Possibly. the drag lever 1 may also be designed so that it serves to open a plurality of identical gas exchange valves.
  • the outer lever 3 has a longitudinally extending receptacle 13 above the pivot bearing 12.
  • this receptacle 13 sits in a decoupling case, for example, a piston-like coupling means 15.
  • a axis 12a is arranged, on which the levers 3, 4 extend relative to each other pivotable.
  • a torsion spring 22 is arranged as a lost-motion spring.
  • the at least one leg 23 (see also Fig. 1 ) supported on an upper side 24 of the aforementioned transverse web 25.
  • Their other leg 26 acts against a transverse bar 27 of the inner lever 4.
  • upper sides 20 of the side walls 2 of the outer lever 3 protrude at least in the region of a center segment-like outward to form sliding surfaces as mating surfaces 21 for cams.
  • These mating surfaces 21 form of inner surfaces 19 of the side walls 2 partially and slightly inwardly projecting Anschlag vom18.
  • the bolt 5 protrudes slightly beyond the arms 7 of the inner lever 4 with its both ends 15a.
  • the cam base circle run is designed as a roller mating surface 6 of the inner lever 4 without cam contact, with the aforementioned mating surfaces 21 are supported on the outer lever 3 at its cams.

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)
EP06818222A 2005-08-05 2006-07-08 Schaltbarer schlepphebel eines ventiltriebs einer brennkraftmaschine Active EP1915517B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005037053A DE102005037053A1 (de) 2005-08-05 2005-08-05 Schaltbarer Schlepphebel eines Ventiltriebs einer Brennkraftmaschine
PCT/EP2006/006702 WO2007017027A1 (de) 2005-08-05 2006-07-08 Schaltbarer schlepphebel eines ventiltriebs einer brennkraftmaschine

Publications (2)

Publication Number Publication Date
EP1915517A1 EP1915517A1 (de) 2008-04-30
EP1915517B1 true EP1915517B1 (de) 2009-03-18

Family

ID=37037077

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06818222A Active EP1915517B1 (de) 2005-08-05 2006-07-08 Schaltbarer schlepphebel eines ventiltriebs einer brennkraftmaschine

Country Status (8)

Country Link
US (1) US7712443B2 (ja)
EP (1) EP1915517B1 (ja)
JP (1) JP4787880B2 (ja)
KR (1) KR20080040693A (ja)
CN (1) CN101238274B (ja)
AT (1) ATE426087T1 (ja)
DE (2) DE102005037053A1 (ja)
WO (1) WO2007017027A1 (ja)

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US7798113B2 (en) * 2007-06-20 2010-09-21 Delphi Technologies, Inc. Two-step roller finger cam follower assembly having a follower travel limiter
DE102007031815A1 (de) 2007-07-07 2009-01-08 Schaeffler Kg Ventiltrieb einer Brennkraftmaschine mit einem schaltbaren Nockenfolger
US7882814B2 (en) 2008-03-03 2011-02-08 Delphi Technologies, Inc. Inner arm stop for a switchable rocker arm
US20190309663A9 (en) 2008-07-22 2019-10-10 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
US11181013B2 (en) 2009-07-22 2021-11-23 Eaton Intelligent Power Limited 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
DE102010005606A1 (de) * 2010-01-25 2011-07-28 Schaeffler Technologies GmbH & Co. KG, 91074 Nockenfolger zur Betätigung eines Gaswechselventils
US8733311B2 (en) * 2010-02-12 2014-05-27 Schaeffler Technologies AG & Co. KG Switchable roller finger follower
US9885258B2 (en) 2010-03-19 2018-02-06 Eaton Corporation Latch interface for a valve actuating device
US9874122B2 (en) 2010-03-19 2018-01-23 Eaton Corporation Rocker assembly having improved durability
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
DE102011079605A1 (de) * 2011-07-22 2013-01-24 Schaeffler Technologies AG & Co. KG Schlepphebel für den Ventiltrieb einer Brennkraftmaschine
JP2014005756A (ja) 2012-06-22 2014-01-16 Hitachi Automotive Systems Ltd 内燃機関の可変動弁装置
US9382819B2 (en) 2012-11-07 2016-07-05 Hitachi Automotive Systems, Ltd. Variable valve device for internal combustion engine
JP5951513B2 (ja) 2013-01-21 2016-07-13 日立オートモティブシステムズ株式会社 多気筒内燃機関の可変動弁装置及び該可変動弁装置の制御装置
JP5947737B2 (ja) 2013-03-07 2016-07-06 日立オートモティブシステムズ株式会社 内燃機関の可変動弁システム、制御装置及び可変動弁装置
SE537693C2 (sv) * 2013-03-11 2015-09-29 Scania Cv Ab Kamföljare för en ventillyftanordning i en förbränningsmotor
US10196944B2 (en) * 2014-10-10 2019-02-05 Schaeffler Technologies AG & Co. KG Mechanical lash control for a switchable roller finger follower
USD791190S1 (en) 2015-07-13 2017-07-04 Eaton Corporation Rocker arm assembly
USD833482S1 (en) 2015-07-13 2018-11-13 Eaton Corporation Rocker arm
KR20180041685A (ko) 2015-08-05 2018-04-24 이턴 인텔리전트 파워 리미티드 내부 배기가스 재순환을 위한 스위칭 로커 암
KR101637310B1 (ko) * 2015-09-16 2016-07-07 현대자동차 주식회사 가변 밸브 리프트 장치
USD830414S1 (en) * 2015-12-10 2018-10-09 Eaton S.R.L. Roller rocker arm of an engine
US9976493B2 (en) 2016-04-01 2018-05-22 Schaoffler Technologies AG & Co. KG Switchable rocker arm with reduced coupling assembly loads
JP6661478B2 (ja) * 2016-06-02 2020-03-11 株式会社オティックス 内燃機関の可変動弁機構
US10113584B2 (en) * 2016-09-30 2018-10-30 Schaeffler Technologies AG & Co. KG Roller finger follower having a bearing sleeve for a floating axle
WO2018068041A1 (en) 2016-10-07 2018-04-12 Eaton Corporation Three roller rocker arm with cantilevered rollers and lost motion spring over valve or over rocker arm pivot
US10088029B1 (en) 2017-04-04 2018-10-02 Schaeffler Technologies AG & Co. KG Cam follower bearing arrangement for roller tappet
US10323549B2 (en) * 2017-07-07 2019-06-18 Progress Rail Locomotive Inc. Self-aligning rocker arm and pushrod design
DE102018102778B4 (de) * 2018-02-08 2024-05-23 Schaeffler Technologies AG & Co. KG Schaltbarer Schlepphebel
CN216142793U (zh) 2018-02-23 2022-03-29 伊顿智能动力有限公司 切换滚子指状随动件

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FR2733539B1 (fr) * 1995-04-28 1997-06-13 Renault Dispositif de distribution variable pour moteur a combustion interne
US5584267A (en) * 1995-12-20 1996-12-17 Eaton Corporation Latchable rocker arm mounting
US5653198A (en) * 1996-01-16 1997-08-05 Ford Motor Company Finger follower rocker arm system
US5655488A (en) * 1996-07-22 1997-08-12 Eaton Corporation Dual event valve control system
US6325030B1 (en) * 2000-01-14 2001-12-04 Delphi Technologies, Inc. Roller finger follower for valve deactivation
US6314928B1 (en) * 2000-12-06 2001-11-13 Ford Global Technologies, Inc. Rocker arm assembly
US6318318B1 (en) * 2001-05-15 2001-11-20 Ford Global Technologies, Inc. Rocker arm assembly
DE10155800A1 (de) * 2001-11-14 2003-05-22 Ina Schaeffler Kg Schlepphebel eines Ventiltriebs einer Brennkraftmaschine
US6532920B1 (en) * 2002-02-08 2003-03-18 Ford Global Technologies, Inc. Multipositional lift rocker arm assembly
US6668779B2 (en) * 2002-05-08 2003-12-30 Delphi Technologies, Inc. Two-step finger follower rocker arm assembly
DE10257705A1 (de) * 2002-12-11 2004-06-24 Ina-Schaeffler Kg Schlepphebel eines Ventiltriebs einer Brennkraftmaschine
DE10308995B4 (de) * 2003-03-01 2015-05-13 Schaeffler Technologies AG & Co. KG Schlepphebel eines Ventiltriebs einer Brennkraftmaschine
DE10310968A1 (de) * 2003-03-13 2004-09-23 Ina-Schaeffler Kg Schlepphebel eines Ventiltriebs einer Brennkraftmaschine
DE102004007766A1 (de) * 2003-03-20 2004-09-30 Ina-Schaeffler Kg Schlepphebel eines Ventiltriebs einer Brennkraftmaschine
ATE384857T1 (de) * 2003-07-23 2008-02-15 Eaton Srl Blechklammer für kipphebel

Also Published As

Publication number Publication date
ATE426087T1 (de) 2009-04-15
WO2007017027A1 (de) 2007-02-15
US20080245326A1 (en) 2008-10-09
JP4787880B2 (ja) 2011-10-05
EP1915517A1 (de) 2008-04-30
US7712443B2 (en) 2010-05-11
KR20080040693A (ko) 2008-05-08
DE102005037053A1 (de) 2007-02-08
CN101238274B (zh) 2010-11-03
DE502006003202D1 (de) 2009-04-30
JP2009503345A (ja) 2009-01-29
CN101238274A (zh) 2008-08-06

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