EP1387048B1 - Levier oscillant pour commande de soupape à course variable - Google Patents

Levier oscillant pour commande de soupape à course variable Download PDF

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Publication number
EP1387048B1
EP1387048B1 EP03015068A EP03015068A EP1387048B1 EP 1387048 B1 EP1387048 B1 EP 1387048B1 EP 03015068 A EP03015068 A EP 03015068A EP 03015068 A EP03015068 A EP 03015068A EP 1387048 B1 EP1387048 B1 EP 1387048B1
Authority
EP
European Patent Office
Prior art keywords
roller element
roller
lever
stroke
hand
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.)
Expired - Lifetime
Application number
EP03015068A
Other languages
German (de)
English (en)
Other versions
EP1387048A3 (fr
EP1387048A2 (fr
Inventor
Michael Allgeier
Torsten Eder
Klaus Dr. Benedikt
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.)
Bayerische Motoren Werke AG
PSA Automobiles SA
Original Assignee
Bayerische Motoren Werke AG
Peugeot Citroen Automobiles SA
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 Bayerische Motoren Werke AG, Peugeot Citroen Automobiles SA filed Critical Bayerische Motoren Werke AG
Publication of EP1387048A2 publication Critical patent/EP1387048A2/fr
Publication of EP1387048A3 publication Critical patent/EP1387048A3/fr
Application granted granted Critical
Publication of EP1387048B1 publication Critical patent/EP1387048B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • 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
    • 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 a pivoting lever for a variable-stroke valve drive according to the features in the preamble of patent claim 1.
  • valve drive device for variable stroke adjustment of a gas exchange valve of an internal combustion engine is described.
  • the gas exchange valve with the interposition of a transmission element with a movable about a rotation axis roller operatively connected to a, a Leerhubkurve and a lift cam comprehensive control path, which is arranged in an end region of a lifting operation of the gas exchange valve controlled by a cam of a camshaft pivot lever.
  • the play-free by means of a spring on a roller cam associated with the pivot lever is supported at the other end to the variable stroke position of the gas exchange valve via a controlled by means of an adjustment position variable and fixable swing fulcrum along a circular path.
  • a purely rotational movement or pure pivoting movement of the pivot lever about its swing pivot point at a reduced stroke of the gas exchange valve is arranged on a housing part of the engine circular path as a backdrop with a radius "R" about the axis of rotation of the role of the transmission element for controlled positionally variable support provided the pivot lever.
  • first roller element 4 Since the first roller element 4 is supported both on the adjusting device 11 and on the slide track, relatively high frictional forces can occur during adjustment of the pivot lever, whereby increased wear can occur.
  • EP 1 096 115 and DE 1 0016 103 show further embodiments of a pivot lever for variable-stroke valve trains.
  • Object of the present invention is to show friction-reducing measures for a generic pivoting lever.
  • roller element into two separate roller elements means that advantageously the first roller element or the second roller element is in operative connection only with either the slide or with the adjusting unit. Production-related tolerances in the production of rolls can be better compensated by this arrangement, whereby the internal friction and thus the wear is reduced.
  • the bearing tolerances of the first roller element and the second roller element whereby production-related tolerances can be even better balanced.
  • the complex configuration according to the claims 3 and 4 has the lowest friction losses and thus the lowest wear during operation of the pivot lever.
  • the embodiment according to claim 5 has the best power distribution and the lowest friction during operation, which in turn increases the service life, minimizes internal friction, wear and fuel consumption of the internal combustion engine.
  • Fig. 1 shows a variable-stroke valve drive 2, which is arranged in a cylinder head 1 shown in the beginning.
  • the stroke variable valve train 2 consists essentially of a pivot lever 3, with a roller element 4 and a swing pivot 4 ', a third roller element 13, and a link 5 with a slide track 5', an intermediate element 7, a gas exchange valve 8, a cam 9, the
  • the pivot lever 3 is supported on the one hand via the roller element 4 on the link path 5 'of the link 5 and on the other hand with a control track 6, which consists of a Leerhubkurve 6' and a lift curve 6 "on the intermediate element 7.
  • the intermediate element 7 is a roller rocker arm, the roller of which is rotatable about an axis of rotation 12.
  • the axis of rotation 12 is simultaneously the center of the rocker track 5 'in a zero stroke position on a lash adjuster 14, here a hydraulic lash adjuster, and on the other hand on the gas exchange valve 8 from.
  • the third roller element 13 is arranged parallel to the first roller element 4 on the pivot lever 3.
  • Fig. 2 shows the side view of a pivot lever 3 for the first and the second embodiment.
  • the pivot lever 3 consists of an approximately box-shaped housing 3 ', which on one end of the control track 6, with the Leerhubkurve 6' and the lifting cam 6 "and at the opposite end a first bore 15 which is aligned normal to the control track 6 has A first bolt 16 is located radially in the first bore 15.
  • the roller element 4 is arranged radially around the first bolt 16.
  • roller element 4 Between the roller element 4 and the control track 6 there is a second bore 15 'in which a second bolt 16' is parallel to the bolt
  • the third roller element 13 is rotatably mounted on the outer circumference around the pin 16 ', and a section AA is drawn through the axes of the first bore 15 and the second bore 15' FIG. 3 and FIG. 4 for each embodiment.
  • Fig. 3 shows a section through the plane AA for a first embodiment of the pivot lever 3.
  • a rolling bearing 17 is arranged radially on the outer circumference about the first pin 16. Radially about this roller bearing 17 is rotatably the roller element 4, mounted within the housing 3 '.
  • the roller element 4 is divided into two first roller elements 4a and a second roller element 4b.
  • the roller element 4b extends in the axial direction over the entire length of the rolling bearing 17, corresponding to an internal dimension, not shown, of the housing 3 '.
  • Radially on the outer circumference of the first roller member 4b, the two second roller elements 4a are arranged rotatably.
  • the two first roller elements 4a form a sliding bearing with the second roller element 4b.
  • first roller element 4a may be provided, which then extends in axial alignment over approximately one half of the second roller element 4b or in the middle of the second roller element 4b is arranged.
  • a roller bearing of the first roller element 4a on the second roller element 4b is also possible.
  • Fig. 4 shows the section through the pivot lever 3 in the plane AA for a second embodiment.
  • two first roller elements 4a and a second roller element 4b bounded by the housing 3 ', rotatably mounted.
  • These first roller elements 4a and the second roller element 4b are arranged next to the first embodiment in the axial direction next to each other and each have their own rolling bearing 17 ', 17 ", 17"' opposite the first pin 16.
  • the first roller element 4a in operative connection with the adjusting device 11
  • the second roller element 4b is in operative connection with the slide track 5 'of the link 5.
  • a section BB is drawn, which is rotated in relation to the section AA by 90 °.
  • first roller element 4a may be provided.
  • first roller element 4a and the second roller element 4b are again adjacent to one another in the axial direction of the first pin 16.
  • roller bearings 17, 17 ', 17 ", 17"' can be designed as a needle bearing and under certain circumstances as a sliding bearing.
  • FIG. 5 shows by way of illustration one opposite Fig. 4 rotated by 90 ° section through the pivot lever for the second embodiment.
  • the description of the figures applies Fig. 4 ,

Landscapes

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

Claims (5)

  1. Levier oscillant (3) de commande de soupape à course variable (2), dans une culasse (1) d'un moteur à combustion, s'appuyant sans jeu d'une part par un élément de roulement (4) avec un point de pivotement (4') sur un chemin de coulisse (5') d'une coulisse (5) et d'autre part par un chemin de commande (6), sur un élément intermédiaire (7) d'une soupape d'échange de gaz (8),
    pour régler la course, d'une part le levier oscillant (3) étant commandé en pivotement entre les points d'appui par une came (9) d'un arbre à came (9') contre la force d'un ressort (10) et d'autre part l'élément de roulement (4) étant commandé en coulissement par une installation d'actionnement (11) pour régler la levée de la course parallèlement au chemin de coulisse (5'),
    caractérisé en ce que
    l'élément de roulement (4) se compose d'un premier élément de roulement (4a) et d'un second élément de roulement (4b) ou de deux premiers éléments de roulement (4a) et d'un second élément de roulement (4b) et est monté radialement sur au moins un palier de roulement (17).
  2. Levier oscillant selon la revendication 1,
    caractérisé en ce qu'
    au moins un premier élément de roulement (4a) est monté radialement à la périphérie extérieure du second élément de roulement (4b).
  3. Levier oscillant selon la revendication 1,
    caractérisé en ce que
    le premier élément de roulement (4a) et le second élément de roulement (4b) sont juxtaposés dans la direction axiale.
  4. Levier oscillant selon la revendication 2 ou 3,
    caractérisé en ce que
    le premier élément de roulement (4a) et le second élément (4b) sont montés chacun sur un palier de roulement distinct (17a, 17b, 17c).
  5. Levier oscillant selon l'une des revendications précédentes,
    caractérisé en ce que
    le palier de roulement (17a, 17b, 17c) est un palier à aiguilles.
EP03015068A 2002-08-02 2003-07-03 Levier oscillant pour commande de soupape à course variable Expired - Lifetime EP1387048B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10235403A DE10235403A1 (de) 2002-08-02 2002-08-02 Schwenkhebel für einen hubvariablen Ventiltrieb
DE10235403 2002-08-02

Publications (3)

Publication Number Publication Date
EP1387048A2 EP1387048A2 (fr) 2004-02-04
EP1387048A3 EP1387048A3 (fr) 2007-07-25
EP1387048B1 true EP1387048B1 (fr) 2009-11-25

Family

ID=30010568

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03015068A Expired - Lifetime EP1387048B1 (fr) 2002-08-02 2003-07-03 Levier oscillant pour commande de soupape à course variable

Country Status (2)

Country Link
EP (1) EP1387048B1 (fr)
DE (2) DE10235403A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103354861A (zh) * 2011-02-10 2013-10-16 谢夫勒科技股份两合公司 中间杆
CN106489020A (zh) * 2014-07-09 2017-03-08 皮尔伯格有限责任公司 可机械控制的气门传动机构

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004008389A1 (de) * 2004-02-20 2005-09-08 Bayerische Motoren Werke Ag Hubvariabler Ventiltrieb für eine Brennkraftmaschine
DE102006018512A1 (de) * 2006-04-21 2007-10-25 Schaeffler Kg Rollenelement für ein schwenkbewegliches Maschinenteil
DE102006018510A1 (de) * 2006-04-21 2007-10-25 Schaeffler Kg Schwinghebel für einen hubvariablen Ventiltrieb
JP4766007B2 (ja) * 2007-06-14 2011-09-07 トヨタ自動車株式会社 可変動弁装置
DE102011003900A1 (de) * 2011-02-10 2012-08-16 Schaeffler Technologies Gmbh & Co. Kg Zwischenhebel
DE102014100748B4 (de) * 2014-01-23 2017-04-27 Pierburg Gmbh Übertragungsanordnung für einen mechanisch steuerbaren Ventiltrieb sowie mechanisch steuerbarer Ventiltrieb
DE102015118884A1 (de) * 2015-11-04 2017-05-04 Pierburg Gmbh Mechanisch steuerbarer Ventiltrieb
DE102016122179A1 (de) * 2016-11-18 2018-05-24 Pierburg Gmbh Mechanisch steuerbarer Ventiltrieb

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4223173A1 (de) * 1992-07-15 1994-01-20 Bayerische Motoren Werke Ag Ventiltrieb einer Brennkraftmaschine
DE4322480C2 (de) * 1993-07-06 1996-05-02 Meta Motoren Energietech Vorrichtung zur variablen Ventilsteuerung von Brennkraftmaschinen
DE59900189D1 (de) * 1999-01-19 2001-09-13 Ford Global Tech Inc Vorrichtung zur variablen Steuerung eines Ventils einer Brennkraftmaschine
DE19913742A1 (de) * 1999-03-26 2000-09-28 Bayerische Motoren Werke Ag Vorrichtung zur Hubverstellung eines Gaswechselventils im Zylinderkopf einer Brennkraftmaschine
DE19920512A1 (de) * 1999-05-05 2000-11-09 Opel Adam Ag Vorrichtung zur Betätigung eines Ventiles mit variablem Hub an Brennkraftmaschinen
EP1096115B1 (fr) * 1999-10-29 2002-07-10 STS System Technology Services GmbH Dispositif de régulation mécanique de la levée de soupape de moteur à combustion interne
DE19960742B4 (de) * 1999-12-16 2006-09-28 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Variabler Ventiltrieb, vorzugsweise für Verbrennungsmotoren
DE10016103A1 (de) * 2000-03-31 2001-10-04 Audi Ag Variable Ventilsteuerung
DE50103100D1 (de) * 2001-05-03 2004-09-09 Sts System Technology Services Mechanische Regelung der Hubverstellung des Einlassventils eines Verbrennungsmotors
DE10123186A1 (de) 2001-05-12 2002-11-14 Bayerische Motoren Werke Ag Ventiltrieb-Vorrichtung zur variablen Hubverstellung eines Gaswechselventils einer Brennkraftmaschine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103354861A (zh) * 2011-02-10 2013-10-16 谢夫勒科技股份两合公司 中间杆
CN103354861B (zh) * 2011-02-10 2016-08-10 舍弗勒技术股份两合公司 中间杆
CN106489020A (zh) * 2014-07-09 2017-03-08 皮尔伯格有限责任公司 可机械控制的气门传动机构
CN106489020B (zh) * 2014-07-09 2019-10-01 皮尔伯格有限责任公司 可机械控制的气门传动机构

Also Published As

Publication number Publication date
EP1387048A3 (fr) 2007-07-25
DE10235403A1 (de) 2004-02-12
EP1387048A2 (fr) 2004-02-04
DE50312150D1 (de) 2010-01-07

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