EP1573174B1 - Levier intermediaire d'un mecanisme de commande variable de soupape d'un moteur a combustion interne - Google Patents

Levier intermediaire d'un mecanisme de commande variable de soupape d'un moteur a combustion interne Download PDF

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Publication number
EP1573174B1
EP1573174B1 EP03767808A EP03767808A EP1573174B1 EP 1573174 B1 EP1573174 B1 EP 1573174B1 EP 03767808 A EP03767808 A EP 03767808A EP 03767808 A EP03767808 A EP 03767808A EP 1573174 B1 EP1573174 B1 EP 1573174B1
Authority
EP
European Patent Office
Prior art keywords
support
intermediate lever
valve train
train according
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.)
Expired - Lifetime
Application number
EP03767808A
Other languages
German (de)
English (en)
Other versions
EP1573174A1 (fr
Inventor
Wolfgang Mayer
Harald Smola
Klaus Bonaventura
Horst DÖPPLING
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 EP1573174A1 publication Critical patent/EP1573174A1/fr
Application granted granted Critical
Publication of EP1573174B1 publication Critical patent/EP1573174B1/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
    • F01L13/0015—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
    • F01L2301/00—Using particular materials
    • 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
    • F01L2303/00—Manufacturing of components used in valve arrangements
    • 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 variable valve train for an internal combustion engine, with an intermediate lever, which has a Beaufschlagungsende and a pivot end and a cam contact surface and a system for a return spring, the Beaufschlagungsende the front side of the intermediate lever and provided with a sliding surface for contact with a lever-like valve opener is, wherein in the region of the pivot end to its change in position eccentric means are provided and wherein the cam contact surface between the loading end and the pivot end is arranged.
  • the document EP-A-1 143 118 likewise shows a valvetrain of the type mentioned in the opening paragraph.
  • the intermediate lever designed as a pivoting lever has at one end a control track which is provided for line contact with a transmission element designed as a lever-type valve opener.
  • the control track includes a Leerhubkurve and a lift curve.
  • the object of the invention is therefore to provide an intermediate lever of the aforementioned type, in which the disadvantages mentioned are eliminated by simple means.
  • the intermediate lever consists of a thin-walled sheet metal material and essentially in one Punching and bending process is prepared in which a stamped blank is formed with lateral wing-like projections and then the approaches are bent while maintaining a base surface of the blank to form the sliding surface for the valve opener such that they form side walls of the intermediate lever.
  • the system is positioned on an upper or lower side of the intermediate lever at the edge region to the Beauftschungsende and extending in the direction of the top or bottom a spherical extension for a contact of a leg Torsion spring has as a return spring, the system is bounded laterally by two guide plates.
  • the system for the return spring which is designed as a torsion leg spring, wherein on the system, a leg of the aforementioned spring should come to rest, preferably in the longitudinal direction of the intermediate lever has a convex profile and is in one piece from its Beaufschlagungsende.
  • the inventively proposed guide tabs for limiting the system give the intermediate lever excellent leadership in its clamped state in the valve train. Due to the crown of the system also edge contact of the corresponding leg of the torsion spring is avoided in a pivoting movement of the intermediate lever.
  • a claim relates to a solution in which the guide plates are formed from side surfaces of the system.
  • the system must laterally each have a wing-like approach, which approaches are then bent towards each other.
  • the following additional fixation measures can be omitted. This embodiment is otherwise not shown in detail drawing.
  • the cam contact surface is produced as a preferably roller bearing roller, the friction work in this area is additionally minimized.
  • the intermediate lever 1 consists of thin-walled sheet metal (sheet steel) and is manufactured in a stamping and bending process. Reference is made to FIG. 2, which shows the punch blank. If the wing-like projections lying laterally of the line of symmetry are bent while forming a base surface to form a loading end 2 or a sliding surface 7, the final design of the intermediate lever 1 essentially results from FIGS. 3 to 5. However, it is before the bending process mentioned still necessary to make the system marked "5" in approximately orthogonal to the board, so that after bending this Appendix 5 already between thus formed guide plates 12, 13 (design of Figure 5) is present.
  • the intermediate lever 1 generally consists of 2 parallel side walls 19, 20, wherein it has a Beauftschungs- and a pivot end 2, 3.
  • the Beauftschungsende 2 is formed here over its entire length as a sliding surface 7 for contact with a lever-like valve opener such as a rocker arm or rocker arm and arranged on the front side of the intermediate lever 1.
  • the pivoting end 3, however, is here designed with a rotatable roller for engagement in or from eccentric means (s) for changing the position of the intermediate lever 1 (BMW Valvetronic system).
  • the lever has a cam contact surface 4 designed here as a rotatable roller.
  • a return spring 6 (see Figure 1) is provided, which is designed here as a torsion spring, wherein one leg 11 abuts against the plant 5.
  • the use of the torsion spring has several advantages, for example, even space-consuming, as they have already been described in the introduction.
  • the intermediate lever 1 is made of a thin-walled sheet metal material in a stamping and bending process.
  • the system 5 is provided for the leg 11 of the return spring 6 with lateral guide plates 12, 13 without the use of separate components. Characterized in that the system 5 preferably has a convex profile, it comes with a pivoting movement of the intermediate lever 1 is not an edge contact with unwanted wear, etc.
  • each guide lug 12, 13 consists of a strip-like projection, which starts from an end face 14 of the installation 5 and extends like a horn back onto the installation 5 in the direction of the loading end 2.
  • each guide lug 12, 13 is produced as a section projecting away from the upper side 8.
  • the guide tabs are approximately orthogonal away from the top 8.
  • embossed recesses 17, 18 are generated on inner sides of the guide plates 12, 13. In these, the system 5 is held with their respective sides 15, 16. Thus, if necessary, a bending of the system 5 is prevented during operation of the intermediate lever 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

L'invention concerne un levier intermédiaire (1) destiné à un mécanisme de commande variable de soupape d'un moteur à combustion interne. Ce levier intermédiaire comprend une extrémité d'actionnement (2) et une extrémité de rotation (3), une surface bossage de came (4) et un support (5) destiné à un ressort de rappel (6). L'extrémité d'actionnement (2) s'étend sur le côté frontal du levier intermédiaire (1) et est dotée d'une surface de glissement (7) destinée à être mise en contact avec un dispositif ouvreur de soupape de type levier. L'extrémité de rotation (3) coopère avec des moyens excentriques pour modifier la position du levier intermédiaire (1). La surface bossage de came (4) est située entre l'extrémité d'actionnement et l'extrémité de rotation (2, 3). Selon l'invention, le levier intermédiaire (1) est réalisé dans un matériau tôle à paroi mince principalement selon un procédé d'estampage-pliage. Le support (5) est placé sur la face supérieure (8, 9) du levier intermédiaire (1) en étant adjacent à la zone bordure (10) de l'extrémité d'actionnement (2) et a une extension bombée qui s'étire en direction de la face supérieure (8, 9) et est destinée à être mise en contact avec une branche (11) d'un ressort de torsion servant de ressort de rappel (6). Le support (5) est délimité latéralement par deux pattes de guidage (12, 13).

Claims (10)

  1. Commande variable de soupapes pour un moteur à combustion interne, ladite commande comprenant un levier intermédiaire (1) qui possède une extrémité d'actionnement (2) et une extrémité de pivotement (3) ainsi qu'une surface de contact (4) de came et un support (5) pour un ressort de rappel (6), l'extrémité d'actionnement (2) s'étendant frontalement sur le levier intermédiaire (1) en étant munie d'une surface de glissement (7) pour un contact avec un ouvre-soupapes du type levier, des moyens d'excentrique étant prévus dans la région du levier de pivotement (3) pour le changement de position de celui-ci, et la surface de contact (4) de came étant agencée entre l'extrémité d'actionnement (2) et l'extrémité de pivotement (3), caractérisée en ce que le levier intermédiaire (1) est fait en tôle métallique à paroi mince en étant fabriqué sensiblement par un procédé de découpage et de pliage dans lequel une ébauche découpée ayant des saillies latérales en forme d'ailes est formée et que, par la suite, ces saillies, en gardant une surface de base de l'ébauche pour former la surface de glissement (7) pour l'ouvre-soupapes, sont repliées de telle façon en montant qu'elles forment des parois latérales (19, 20) du levier intermédiaire (1).
  2. Commande de soupapes selon la revendication 1, caractérisée en ce que le support (5) est disposé sur un côté supérieur ou inférieur (8, 9) du levier intermédiaire (1) dans la région de bord (10) avec l'extrémité d'actionnement (2) et que, en s'étendant vers le côté supérieur ou inférieur (8, 9), ce support (5) a une allure bombée pour un contact d'un bras (11) d'un ressort de torsion qui constitue le ressort de rappel (6), et en ce que le support (5) est délimité latéralement par deux talons de guidage (12, 13).
  3. Commande de soupapes selon la revendication 2, caractérisée en ce que le support (5), avec ses talons de guidage (12, 13) est fait d'un seul tenant avec le levier intermédiaire (1).
  4. Commande de soupapes selon la revendication 2, caractérisée en ce que le support (5) est configuré sous la forme d'un prolongement de l'extrémité d'actionnement (2) en étant plié vers le côté supérieur ou inférieur (8, 9), chaque talon de guidage (12, 13) étant constitué par une saillie en forme de bande qui s'étend dans la direction d'étendue du support (5), et en ce que cette saillie s'étend à partir d'un côté frontal (14) du support (5) en étant recourbée en forme de corne sur le support (5), de préférence, en direction de l'extrémité d'actionnement (2) (Figures 3, 4).
  5. Commande de soupapes selon la revendication 2, caractérisée en ce que le support (5) est configuré sous la forme d'un prolongement de l'extrémité d'actionnement (2) en étant plié vers le côté supérieur ou inférieur (8, 9), chaque talon de guidage (12, 13) étant constitué par une section qui fait saillie à partir du côté supérieur ou inférieur (8, 9) (Figure 5).
  6. Commande de soupapes selon la revendication 5, caractérisée en ce que chaque talon de guidage (12, 13) possède une cavité (17, 18) dont la forme est complémentaire à celle du côté opposé (15, 16) du support (5), et dans cette cavité (17, 18) est retenu le côté opposé (15, 16) correspondant.
  7. Commande de soupapes selon la revendication 6, caractérisée en ce que les cavités (17, 18) sont réalisées sans enlèvement de copeaux par un procédé tel que matriçage ou estampage rudimentaire.
  8. Commande de soupapes selon la revendication 2, caractérisée en ce que le support (5) est configuré sous la forme d'un prolongement de l'extrémité d'actionnement (2) en étant plié vers le côté supérieur ou inférieur (8, 9), chaque talon de guidage (12, 13) étant constitué par une saillie qui s'étend latéralement à partir du support (5), et en ce que ces saillies sont pliées à peu près de 90° de telle façon, l'une vers l'autre, qu'elles font saillie sur le côté supérieur ou inférieur (8, 9).
  9. Commande de soupapes selon la revendication 1, caractérisée en ce que la surface de contact (4) de came est réalisée sous la forme d'un galet tournant qui est disposé, à volonté, sur un roulement.
  10. Commande de soupapes selon la revendication 4 ou 5, caractérisée en ce que le support (5) et les talons de guidage (12, 13) sont fixés, l'un à l'autre, par un joint soudé, brasé ou collé.
EP03767808A 2002-12-21 2003-12-16 Levier intermediaire d'un mecanisme de commande variable de soupape d'un moteur a combustion interne Expired - Lifetime EP1573174B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10260557 2002-12-21
DE10260557A DE10260557A1 (de) 2002-12-21 2002-12-21 Zwischenhebel für einen variablen Ventiltrieb einer Brennkraftmaschine
PCT/EP2003/014299 WO2004057160A1 (fr) 2002-12-21 2003-12-16 Levier intermediaire d'un mecanisme de commande variable de soupape d'un moteur a combustion interne

Publications (2)

Publication Number Publication Date
EP1573174A1 EP1573174A1 (fr) 2005-09-14
EP1573174B1 true EP1573174B1 (fr) 2007-02-14

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP03767808A Expired - Lifetime EP1573174B1 (fr) 2002-12-21 2003-12-16 Levier intermediaire d'un mecanisme de commande variable de soupape d'un moteur a combustion interne

Country Status (6)

Country Link
US (1) US7055478B2 (fr)
EP (1) EP1573174B1 (fr)
AU (1) AU2003292245A1 (fr)
DE (2) DE10260557A1 (fr)
ES (1) ES2282686T3 (fr)
WO (1) WO2004057160A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015149758A1 (fr) 2014-04-02 2015-10-08 Schaeffler Technologies AG & Co. KG Procédé de fabrication d'un levier intermédiaire
DE102020123364A1 (de) 2020-09-08 2022-03-10 Schaeffler Technologies AG & Co. KG Zwischenhebel aus Blech für einen hubvariablen Ventiltrieb einer Brennkraftmaschine
DE102021120356A1 (de) 2020-09-08 2022-03-10 Schaeffler Technologies AG & Co. KG Verfahren zur Herstellung eines Grundkörper eines Zwischenhebels und Zwischenhebel, jeweils für einen hubvariablen Ventiltrieb einer Brennkraftmaschine

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DE102006018510A1 (de) * 2006-04-21 2007-10-25 Schaeffler Kg Schwinghebel für einen hubvariablen Ventiltrieb
DE102010009399A1 (de) 2010-02-26 2011-09-01 Schaeffler Technologies Gmbh & Co. Kg Schwenkhebel für einen hubvariablen Gaswechselventiltrieb
DE102011003898B4 (de) * 2011-02-10 2021-09-09 Schaeffler Technologies AG & Co. KG Zwischenhebel
DE102011003900A1 (de) * 2011-02-10 2012-08-16 Schaeffler Technologies Gmbh & Co. Kg Zwischenhebel
DE102011077527A1 (de) * 2011-06-15 2012-12-20 Schaeffler Technologies AG & Co. KG Zwischenhebel
DE102012222373A1 (de) * 2012-12-06 2014-06-12 Schaeffler Technologies Gmbh & Co. Kg Zwischenhebel
DE102012222374A1 (de) * 2012-12-06 2014-06-12 Schaeffler Technologies Gmbh & Co. Kg Zwischenhebel
DE102016220396A1 (de) * 2016-10-18 2017-08-10 Schaeffler Technologies AG & Co. KG Zwischenhebel eines variablen Ventiltriebs
DE102016220399A1 (de) 2016-10-18 2017-09-07 Schaeffler Technologies AG & Co. KG Zwischenhebel eines variablen Ventiltriebs
DE102016220401A1 (de) 2016-10-18 2017-09-07 Schaeffler Technologies AG & Co. KG Zwischenhebel eines variablen Ventiltriebs
DE102016220394B3 (de) * 2016-10-18 2017-12-28 Schaeffler Technologies AG & Co. KG Zwischenhebel eines variablen Ventiltriebs
DE102016220397A1 (de) 2016-10-18 2017-08-10 Schaeffler Technologies AG & Co. KG Zwischenhebel eines variablen Ventiltriebs
DE102016223087A1 (de) 2016-11-23 2017-10-26 Schaeffler Technologies AG & Co. KG Zwischenhebel eines variablen Ventiltriebs
DE102016223086A1 (de) 2016-11-23 2018-05-24 Schaeffler Technologies AG & Co. KG Zwischenhebel eines variablen Ventiltriebs
DE102016223088A1 (de) 2016-11-23 2018-05-24 Schaeffler Technologies AG & Co. KG Zwischenhebel eines variablen Ventiltriebs
CN114147420B (zh) * 2020-09-08 2025-10-21 舍弗勒投资(中国)有限公司 内燃机可变行程气门机构的中间臂的主体的制造方法

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DE19721210A1 (de) * 1997-05-21 1998-11-26 Schaeffler Waelzlager Ohg Spanlos geformter Schlepphebel
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DE10059545B4 (de) 2000-11-30 2021-05-06 Schaeffler Technologies AG & Co. KG Verfahren zur Herstellung eines hebelartigen Nockenfolgers sowie Blechrohling in Form einer Platine zur Bildung eines hebelartigen Nokkenfolgers
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015149758A1 (fr) 2014-04-02 2015-10-08 Schaeffler Technologies AG & Co. KG Procédé de fabrication d'un levier intermédiaire
DE102014206314A1 (de) 2014-04-02 2015-10-08 Schaeffler Technologies AG & Co. KG Verfahren zur Herstellung eines Zwischenhebels
DE102020123364A1 (de) 2020-09-08 2022-03-10 Schaeffler Technologies AG & Co. KG Zwischenhebel aus Blech für einen hubvariablen Ventiltrieb einer Brennkraftmaschine
DE102021120356A1 (de) 2020-09-08 2022-03-10 Schaeffler Technologies AG & Co. KG Verfahren zur Herstellung eines Grundkörper eines Zwischenhebels und Zwischenhebel, jeweils für einen hubvariablen Ventiltrieb einer Brennkraftmaschine
DE102020123364B4 (de) * 2020-09-08 2025-05-22 Schaeffler Technologies AG & Co. KG Zwischenhebel aus Blech für einen hubvariablen Ventiltrieb einer Brennkraftmaschine

Also Published As

Publication number Publication date
DE50306542D1 (de) 2007-03-29
DE10260557A1 (de) 2004-07-01
EP1573174A1 (fr) 2005-09-14
ES2282686T3 (es) 2007-10-16
US7055478B2 (en) 2006-06-06
AU2003292245A1 (en) 2004-07-14
US20050241601A1 (en) 2005-11-03
WO2004057160A1 (fr) 2004-07-08

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