EP1387049B1 - Rocker arm for a variable lift valve drive - Google Patents

Rocker arm for a variable lift valve drive Download PDF

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Publication number
EP1387049B1
EP1387049B1 EP03015069A EP03015069A EP1387049B1 EP 1387049 B1 EP1387049 B1 EP 1387049B1 EP 03015069 A EP03015069 A EP 03015069A EP 03015069 A EP03015069 A EP 03015069A EP 1387049 B1 EP1387049 B1 EP 1387049B1
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EP
European Patent Office
Prior art keywords
pivot lever
link
lever
valve drive
roller
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
EP03015069A
Other languages
German (de)
French (fr)
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EP1387049A1 (en
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
Original Assignee
Bayerische Motoren Werke AG
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
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Publication of EP1387049A1 publication Critical patent/EP1387049A1/en
Application granted granted 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
    • 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
    • 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
    • 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
    • F01L2820/00—Details on specific features characterising valve gear arrangements
    • F01L2820/01—Absolute values

Definitions

  • the invention relates to a pivot lever for a variable-stroke valve drive according to the features in the preamble of claim 1.
  • valve drive device for variable stroke adjustment a gas exchange valve of an internal combustion engine described.
  • Valve train device is the gas exchange valve with the interposition of a Transmission element with a movable about a rotation axis roller in operative connection with a control path comprising a no-lift curve and a lift curve, in an end region of a stroke for the gas exchange valve of a cam of a camshaft controlled pivot lever is arranged.
  • the swivel lever housings produced by precision casting usually have a relatively high weight, which causes the highest speed of the internal combustion engine In addition, the manufacturing costs for precision castings could be limited high.
  • the object of the present invention is to provide a generic pivoting lever lighter in weight and cheaper to make in manufacturing.
  • the housing can be designed as a bending, stamped or welded construction. These inexpensive production methods reduce the manufacturing costs. Furthermore, the component thickness can be minimized in the course of sheet metal forming, since material hardening advantageously takes place during the forming process. Due to the weight reduction higher speeds can be achieved with the valve train.
  • FIG. 1 shows a variable-stroke valve drive 2, which is connected to a partial representation Cylinder head 1 is arranged.
  • the variable stroke valve train 2 consists essentially from a pivot lever 3 with a roller element 4 and a swing fulcrum 4 'and a gate 5 with a slide track 5', an intermediate element 7, a gas exchange valve 8, a cam 9, on a camshaft 9 'is arranged and a spring 10 and an adjusting device 11.
  • the scenery 5 is fixedly arranged on the cylinder head 1.
  • the pivot lever 3 is supported on the one hand on the roller element 4 on the slide track 5 'of the link 5 and on the other with a control track 6, which consists of a Leerhubkurve 6 'and a lift curve 6 " exists on the intermediate element 7 from.
  • the intermediate element 7 is a roller cam follower, whose role is rotatable about a rotation axis 12.
  • the rotation axis 12 is also the center of the slide track 5 'in a Nullhub too.
  • the Intermediate element is supported on the one hand by the axis of rotation 12 on a clearance compensation element 14, here a hydraulic valve clearance compensation element, and on the other hand on the gas exchange valve 8 from.
  • a further roller element 13 is arranged on the pivot lever 3. This is in operative connection with the cam 9.
  • the camshaft 9 Upon rotation of the camshaft 9 'pivots the pivot lever 3 and presses with its lift curve 6 "that Gas exchange valve in an open position, not shown away.
  • the first Roller element 4 is in addition to the support on the slide track 5 'in addition to an adjusting device 11 supported, with the swing pivot 4 'of the first Roller element 4 parallel to the slide track 5 'can be moved. Such Displacement causes a change in the valve lift.
  • FIG. 2 shows a three-dimensional plan view of a device according to the invention Swivel lever 3 with a housing 17.
  • the housing 17 is essentially of a first and a second side wall 3a arranged parallel to one another, 3b formed a bleaching part. This bleaching part is reshaped so that the side cheeks 3a, 3b form a U-shaped bracket.
  • a stiffening bracket 16 is formed in a joined area.
  • the middle area of the U-shaped Ironing forms the control track 6, consisting of the Leerhubkurve 6 'and the lift curve 6 ".
  • the first and second side cheeks 3a, 3b in each case a corresponding one is located in the side cheeks 3a, 3b first bore 15 and again spaced from each one corresponding second bore 15 '.
  • the second roller member 13 In the corresponding holes 15 is the second roller member 13 rotatably mounted, in the corresponding Holes 15 'is the first roller member 4 rotatably mounted.
  • the stiffening bracket 16 In the area of the first roller element 4 are the first and second side cheeks 3a, 3b with the stiffening bracket 16, which extends in the direction of a roller axis and the first roller 4 bridged, connected.
  • the two side walls 3a, 3b and the Control track 6 and the stiffening bracket 16 in one piece and of uniform material. she were created by forming from a metal sheet.
  • the stiffening bracket 16 is on welded to its joint, but it can also be soldered.
  • the sheet thickness is in the present case an average of about 3.5 mm, they can However, in a range between 1 and 5 mm or due to the deformation vary, depending on the mechanical requirements of the pivot lever 3 are made.
  • the first roller element 4 and the second roller element 13 are made of hardened steel.
  • the housing 17 by welding individual sheet metal parts, e.g. from the first and second side cheeks 3a, 3b and the control track 6 and the stiffening bracket 16 make up to produce.
  • the first and the second roller element 4, 13 may be roller or needle bearing.
  • the first and second side cheeks 3a, 3b also have stiffening ribs or similar structures.
  • the stiffening bar 16 can also be arranged at a different location, or it can be more stiffening be provided.

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)

Description

Die Erfindung betrifft einen Schwenkhebel für einen hubvariablen Ventiltrieb gemäß der Merkmale im Oberbegriff des Patentanspruches 1.The invention relates to a pivot lever for a variable-stroke valve drive according to the features in the preamble of claim 1.

Sie geht von der noch nicht veröffentlichten deutschen Patentanmeldung DE 101 23 186 aus. In dieser ist eine Ventiltriebsvorrichtung zur variablen Hubverstellung eines Gaswechselventils einer Brennkraftmaschine beschrieben. Bei der Ventiltriebsvorrichtung steht das Gaswechselventil unter Zwischenschaltung eines Übertragungselementes mit einer um eine Drehachse beweglichen Rolle in Wirkverbindung mit einer, eine Leerhubkurve und eine Hubkurve umfassenden Steuerbahn, die in einem Endbereich eines zur Hubbetätigung des Gaswechselventils von einem Nocken einer Nockenwelle gesteuerten Schwenkhebels angeordnet ist. Der mittels einer Feder über eine Rolle dem Nocken spielfrei zugeordnete Schwenkhebel ist andernends zur variablen Hubverstellung des Gaswechselventils über einen mittels einer Verstelleinrichtung gesteuert lageveränderbaren und fixierbaren Schwingdrehpunkt längs einer Kreisbahn abgestützt. Zur Erzielung einer rein rotatorischen Bewegung bzw. reinen Schwenkbewegung des Schwenkhebels um seinen Schwingdrehpunkt bei einem reduzierten Hub des Gaswechselventils ist eine, an einem Gehäuseteil der Brennkraftmaschine angeordneten Kreisbahn als Kulisse mit einem Radius "R" um die Drehachse der Rolle des Übertragungselementes zur gesteuerten lageveränderbaren Abstützung des Schwenkhebels vorgesehen. Der Schwenkhebel besteht aus einem Gehäuse, welches üblicherweise wie in Fig. 1, die den Stand der Technik darstellt, erkennbar ist, im Feingussverfahren hergestellt wird. In diesem Gehäuse sind zwei Rollen drehbar angeordnet, eine Rolle zur Hubbetätigung durch den Nocken und eine Rolle zur Verstellung der Hubhöhe.It is based on the not yet published German patent application DE 101 23 186 from. In this is a valve drive device for variable stroke adjustment a gas exchange valve of an internal combustion engine described. In the Valve train device is the gas exchange valve with the interposition of a Transmission element with a movable about a rotation axis roller in operative connection with a control path comprising a no-lift curve and a lift curve, in an end region of a stroke for the gas exchange valve of a cam of a camshaft controlled pivot lever is arranged. Of the by means of a spring via a roller cam associated with the play associated pivoting lever is the other hand for variable stroke adjustment of the gas exchange valve via a controlled by means of an adjustment position variable and fixable Oscillating fulcrum supported along a circular path. To achieve a purely rotational Movement or pure pivoting movement of the pivot lever to his Vibration fulcrum at a reduced lift of the gas exchange valve is on a housing part of the internal combustion engine arranged circular path as a backdrop with a radius "R" about the axis of rotation of the roller of the transmission element to the controlled position variable support of the pivot lever provided. Of the Pivoting lever consists of a housing, which usually as in Fig. 1, the represents the state of the art, it can be seen, produced by precision casting becomes. In this housing two rollers are rotatably arranged, a role for lifting operation through the cam and a roller for adjusting the lifting height.

Die im Feingussverfahren hergestellten Schwenkhebelgehäuse weisen üblicherweise ein relativ hohes Gewicht auf, wodurch die höchste Drehzahl der Brennkraftmaschine eingeschränkt sein könnte, darüber hinaus sind die Herstellkosten für Feingussteile hoch.The swivel lever housings produced by precision casting usually have a relatively high weight, which causes the highest speed of the internal combustion engine In addition, the manufacturing costs for precision castings could be limited high.

Aufgabe der vorliegenden Erfindung ist es, einen gattunsgemäßen Schwenkhebel leichter im Gewicht und billiger in der Herstellung zu machen.The object of the present invention is to provide a generic pivoting lever lighter in weight and cheaper to make in manufacturing.

Diese Aufgabe wird durch das Merkmal im kennzeichnenden Teil des Patentanspruches 1 gelöst.
In vorteilhafter Weise kann das Gehäuse als Biege, Stanz- oder Schweißkonstruktion ausgeführt werden. Diese preisgünstigen Herstellverfahren reduzieren die Herstellkosten. Ferner kann die Bauteilstärke im Zuge der Blechumformung minimal ausgelegt werden, da in vorteilhafter Weise bei der Umformung eine Materialverfestigung eintritt. Aufgrund der Gewichtsreduzierung sind mit dem Ventiltrieb höhere Drehzahlen erreichbar.This object is achieved by the feature in the characterizing part of claim 1.
Advantageously, the housing can be designed as a bending, stamped or welded construction. These inexpensive production methods reduce the manufacturing costs. Furthermore, the component thickness can be minimized in the course of sheet metal forming, since material hardening advantageously takes place during the forming process. Due to the weight reduction higher speeds can be achieved with the valve train.

Eine Ausgestaltung gemäß der Patentansprüche 2 und 3 gewährleistet hinreichende Festigkeit des Bauteils und eine teure Kombination unterschiedlicher Materialien ist nicht notwendig.An embodiment according to claims 2 and 3 ensures sufficient Strength of the component and an expensive combination of different materials unnecessary.

Durch eine geeignete Materialstärkenauswahl gemäß Patentanspruch 4 kann die beste Abstimmung zwischen Gewichtreduzierung und notwendiger Festigkeit erzielt werden.By a suitable material thickness selection according to claim 4, the best balance between weight reduction and necessary strength achieved become.

Im Folgenden ist die Erfindung anhand eines bevorzugten Ausführungsbeispieles in zwei Figuren näher erläutert.

Figur 1
zeigt einen schematischen Aufbau eines gattungsgemäßen hubvariablen Ventiltriebes,
Figur 2
zeigt eine dreidimensionale Aufsicht auf einen erfindungsgemäßen Schwenkhebel.
In the following the invention with reference to a preferred embodiment is explained in more detail in two figures.
FIG. 1
shows a schematic structure of a generic variable-stroke valve drive,
FIG. 2
shows a three-dimensional view of a pivot lever according to the invention.

Für dieselben Bauteile in Figur 1 und Figur 2 gelten dieselben Bezugszeichen.The same reference numerals apply to the same components in FIG. 1 and FIG.

Figur 1 zeigt einen hubvariablen Ventiltrieb 2, der an einen ansatzweise dargestellten Zylinderkopf 1 angeordnet ist. Der hubvariable Ventiltrieb 2 besteht im wesentlichen aus einem Schwenkhebel 3 mit einem Rollenelement 4 und einem Schwingdrehpunkt 4' sowie einer Kulisse 5 mit einer Kulissenbahn 5', einem Zwischenelement 7, einem Gaswechselventil 8, einem Nocken 9, der auf einer Nockenwelle 9' angeordnet ist sowie einer Feder 10 und einer Verstelleinrichtung 11. Die Kulisse 5 ist ortsfest am Zylinderkopf 1 angeordnet. Der Schwenkhebel 3 stützt sich einerseits über das Rollenelement 4 auf der Kulissenbahn 5' der Kulisse 5 und andererseits mit einer Steuerbahn 6, die aus einer Leerhubkurve 6' und einer Hubkurve 6" besteht, auf dem Zwischenelement 7 ab. Das Zwischenelement 7 ist ein Rollenschlepphebel, dessen Rolle um eine Drehachse 12 drehbar ist. Die Drehachse 12 ist gleichzeitig der Mittelpunkt der Kulissenbahn 5' in einer Nullhubstellung. Das Zwischenelement stützt sich einerseits von der Drehachse 12 auf einem Spielausgleichselement 14, hier ein hydraulischen Ventilspielausgleichselement, und andererseits auf dem Gaswechselventil 8 ab. Zwischen der Steuerbahn 6 und dem ersten Rollenelement 4 ist an den Schwenkhebel 3 ein weiteres Rollenelement 13 angeordnet. Dieses steht in Wirkverbindung mit dem Nocken 9. Bei Drehung der Nockenwelle 9' schwenkt der Schwenkhebel 3 und drückt mit seiner Hubkurve 6" das Gaswechselventil in eine nicht näher dargestellte Öffnungsstellung weg. Das erste Rollenelement 4 ist neben der Abstützung auf der Kulissenbahn 5' zusätzlich an einer Verstelleinrichtung 11 abgestützt, mit der der Schwingdrehpunkt 4' des ersten Rollenelements 4 parallel zur Kulissenbahn 5' verschoben werden kann. Eine derartige Verschiebung bewirkt eine Veränderung des Ventilhubes.FIG. 1 shows a variable-stroke valve drive 2, which is connected to a partial representation Cylinder head 1 is arranged. The variable stroke valve train 2 consists essentially from a pivot lever 3 with a roller element 4 and a swing fulcrum 4 'and a gate 5 with a slide track 5', an intermediate element 7, a gas exchange valve 8, a cam 9, on a camshaft 9 'is arranged and a spring 10 and an adjusting device 11. The scenery 5 is fixedly arranged on the cylinder head 1. The pivot lever 3 is supported on the one hand on the roller element 4 on the slide track 5 'of the link 5 and on the other with a control track 6, which consists of a Leerhubkurve 6 'and a lift curve 6 " exists on the intermediate element 7 from. The intermediate element 7 is a roller cam follower, whose role is rotatable about a rotation axis 12. The rotation axis 12 is also the center of the slide track 5 'in a Nullhubstellung. The Intermediate element is supported on the one hand by the axis of rotation 12 on a clearance compensation element 14, here a hydraulic valve clearance compensation element, and on the other hand on the gas exchange valve 8 from. Between the control track 6 and the first Roller element 4, a further roller element 13 is arranged on the pivot lever 3. This is in operative connection with the cam 9. Upon rotation of the camshaft 9 'pivots the pivot lever 3 and presses with its lift curve 6 "that Gas exchange valve in an open position, not shown away. The first Roller element 4 is in addition to the support on the slide track 5 'in addition to an adjusting device 11 supported, with the swing pivot 4 'of the first Roller element 4 parallel to the slide track 5 'can be moved. Such Displacement causes a change in the valve lift.

Figur 2 zeigt eine dreidimensionale Aufsicht auf einen erfindungsgemäßen Schwenkhebel 3 mit einem Gehäuse 17. Das Gehäuse 17 wird im wesentlichen von einer ersten und einer zweiten parallel zueinander angeordneten Seitenwange 3a, 3b eines Bleichteiles gebildet. Dieses Bleichteil ist derart umgeformt, dass die Seitenwangen 3a, 3b einen U-förmigen Bügel bilden. In einem zusammengefügten Bereich ist ein Versteifungsbügel 16 ausgebildet. Den Mittenbereich des U-förmigen Bügels bildet die Steuerbahn 6, bestehend aus der Leerhubkurve 6' und der Hubkurve 6". Beabstandet von der Steuerbahn 6, der ersten und der zweiten Seitenwange 3a, 3b folgend, befindet sich in den Seitenwangen 3a, 3b jeweils eine korrespondierende erste Bohrung 15 und davon nochmals beabstandet jeweils eine korrespondierende zweite Bohrung 15'. In den korrespondierenden Bohrungen 15 ist das zweite Rollenelement 13 drehbeweglich gelagert, in den korrespondierenden Bohrungen 15' ist das erste Rollenelement 4 drehbeweglich gelagert. Im Bereich des ersten Rollenelementes 4 sind die erste und die zweite Seitenwange 3a, 3b mit dem Versteifungsbügel 16, der sich in Richtung einer Rollenachse erstreckt und die erste Rolle 4 überbrückt, verbunden.FIG. 2 shows a three-dimensional plan view of a device according to the invention Swivel lever 3 with a housing 17. The housing 17 is essentially of a first and a second side wall 3a arranged parallel to one another, 3b formed a bleaching part. This bleaching part is reshaped so that the side cheeks 3a, 3b form a U-shaped bracket. In a joined area a stiffening bracket 16 is formed. The middle area of the U-shaped Ironing forms the control track 6, consisting of the Leerhubkurve 6 'and the lift curve 6 ". Distances from the control track 6, the first and second side cheeks 3a, 3b, in each case a corresponding one is located in the side cheeks 3a, 3b first bore 15 and again spaced from each one corresponding second bore 15 '. In the corresponding holes 15 is the second roller member 13 rotatably mounted, in the corresponding Holes 15 'is the first roller member 4 rotatably mounted. In the area of the first roller element 4 are the first and second side cheeks 3a, 3b with the stiffening bracket 16, which extends in the direction of a roller axis and the first roller 4 bridged, connected.

Im vorliegenden Ausführungsbeispiel sind die zwei Seitenwangen 3a, 3b sowie die Steuerbahn 6 und der Versteifungsbügel 16 einstückig und materialeinheitlich. Sie sind durch Umformen aus einem Blech entstanden. Der Versteifungsbügel 16 ist an seiner Stoßstelle verschweißt, er kann aber auch verlötet sein. Bei dem Blech handelt es sich um härtbares Stahlblech, welches durch unterschiedliche Wärmebehandlung an unterschiedlich belasteten Stellen unterschiedliche Härten aufweist. Die Blechstärke beträgt im vorliegenden Fall durchschnittlich ca. 3,5 mm, sie kann jedoch in einem Bereich zwischen 1 und 5 mm liegen bzw. aufgrund der Umformung variieren, je nachdem welche mechanischen Anforderungen an den Schwenkhebel 3 gestellt werden. Das erste Rollenelement 4 und das zweite Rollenelement 13 sind aus gehärtetem Stahl.In the present embodiment, the two side walls 3a, 3b and the Control track 6 and the stiffening bracket 16 in one piece and of uniform material. she were created by forming from a metal sheet. The stiffening bracket 16 is on welded to its joint, but it can also be soldered. When the sheet is it is hardenable steel sheet, which by different heat treatment has different hardnesses at different loaded sites. The sheet thickness is in the present case an average of about 3.5 mm, they can However, in a range between 1 and 5 mm or due to the deformation vary, depending on the mechanical requirements of the pivot lever 3 are made. The first roller element 4 and the second roller element 13 are made of hardened steel.

Neben einer einstückigen Herstellung aus Blech durch Umformung ist es auch möglich, das Gehäuse 17 durch Verschweißen einzelner Blechteile, die sich z.B. aus der ersten und der zweiten Seitenwange 3a, 3b sowie der Steuerbahn 6 und dem Versteifungsbügel 16 zusammensetzen, herzustellen. Das erste und das zweite Rollenelement 4, 13 können wälz- oder nadelgelagert sein. Um bestimmten mechanischen Anforderungen Genüge zu tun, können die erste und die zweite Seitenwange 3a, 3b auch Versteifungsrippen oder ähnliche Strukturen aufweisen. Der Versteifungsbügel 16 kann auch an einer anderen Stelle angeordnet, bzw es können mehrere Versteifungsbügel vorgesehen sein. In addition to a one-piece production from sheet metal by forming, it is also possible the housing 17 by welding individual sheet metal parts, e.g. from the first and second side cheeks 3a, 3b and the control track 6 and the stiffening bracket 16 make up to produce. The first and the second roller element 4, 13 may be roller or needle bearing. To certain mechanical Requirements To do so, the first and second side cheeks 3a, 3b also have stiffening ribs or similar structures. The stiffening bar 16 can also be arranged at a different location, or it can be more stiffening be provided.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Zylinderkopfcylinder head
22
Hubvariabler VentiltriebHubvariabler valve drive
33
Schwenkhebelpivoting lever
3a3a
Erste SeitenwangeFirst side cheek
3b3b
Zweite SeitenwangeSecond side cheek
44
Erstes RollenelementFirst roller element
4'4 '
SchwingdrehpunktSwing fulcrum
55
Kulissescenery
5'5 '
Kulissenbahnlink path
66
Steuerbahncontrol track
6'6 '
LeerhubkurveLeerhubkurve
6"6 "
Hubkurvestroke curve
77
Zwischenelementintermediate element
88th
GaswechselventilGas exchange valve
99
Nockencam
9'9 '
Nockenwellecamshaft
1010
Federfeather
1111
Verstelleinrichtungadjustment
1212
Drehachseaxis of rotation
1313
Zweites RollenelementSecond roller element
1414
SpielausgleichselementLash adjuster
1515
Erste BohrungFirst drilling
15'15 '
Zweite BohrungSecond hole
1616
Versteifungsbügelstiffener
1717
Gehäusecasing

Claims (4)

  1. A pivot lever (3) for a variable-lift valve drive (2) in a cylinder head (1) of an internal-combustion engine, which lever is supported without play, on one side, with a roller element (4) having an oscillating pivot point (4'), on a link path (5') of a link (5) and, on the other side, with a control path (6) on an intermediate element (7) leading to a gas exchange valve (8), wherein, in order to adjust the lift between the support points, the pivot lever (3), on the one hand, may be pivoted in a controlled manner by a cam (9) of a camshaft (9'), counter to a force of a spring (10), and the oscillating pivot point (4'), on the other hand, may be displaced in a controlled manner by an adjusting device (11) for adjusting the lift height parallel to the link path (5'), characterised in that the pivot lever (3) and the control path (6) are made of sheet metal.
  2. A link according to claim 1, characterised in that the pivot lever (3) is integral with the control path (6) and united with it in terms of material.
  3. A pivot lever according to either claim 1 or claim 2, characterised in that the metal sheet is a steel sheet.
  4. A pivot lever according to any one of the above-mentioned claims, characterised in that the metal sheet is between one and five millimetres thick.
EP03015069A 2002-08-02 2003-07-03 Rocker arm for a variable lift valve drive Expired - Lifetime EP1387049B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10235402A DE10235402A1 (en) 2002-08-02 2002-08-02 Swivel lever for a variable stroke valve train
DE10235402 2002-08-02

Publications (2)

Publication Number Publication Date
EP1387049A1 EP1387049A1 (en) 2004-02-04
EP1387049B1 true EP1387049B1 (en) 2005-01-26

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EP03015069A Expired - Lifetime EP1387049B1 (en) 2002-08-02 2003-07-03 Rocker arm for a variable lift valve drive

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DE102010009399A1 (en) 2010-02-26 2011-09-01 Schaeffler Technologies Gmbh & Co. Kg Operating lever for stroke-variable gas exchange valve gear of internal-combustion engine, has lever housing, which is formed with two side panels and base, which is connected with side panels
DE102011003898B4 (en) * 2011-02-10 2021-09-09 Schaeffler Technologies AG & Co. KG Intermediate lever
DE102011003900A1 (en) * 2011-02-10 2012-08-16 Schaeffler Technologies Gmbh & Co. Kg intermediate lever
DE102011077527A1 (en) * 2011-06-15 2012-12-20 Schaeffler Technologies AG & Co. KG intermediate lever
DE102012204682A1 (en) 2012-03-23 2013-09-26 Schaeffler Technologies AG & Co. KG Hubvariabler valve drive for an internal combustion engine
DE102012222374A1 (en) * 2012-12-06 2014-06-12 Schaeffler Technologies Gmbh & Co. Kg intermediate lever
DE102014206314A1 (en) * 2014-04-02 2015-10-08 Schaeffler Technologies AG & Co. KG Method for producing an intermediate lever
DE102014208809A1 (en) * 2014-05-09 2015-11-12 Schaeffler Technologies AG & Co. KG Rocker arm assembly for a valve train of an internal combustion engine and method for mounting a rocker arm assembly
DE102014208810A1 (en) * 2014-05-09 2015-11-12 Schaeffler Technologies AG & Co. KG Rocker arm assembly for a valve train of an internal combustion engine and method for mounting a rocker arm assembly
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DE102016220394B3 (en) * 2016-10-18 2017-12-28 Schaeffler Technologies AG & Co. KG Intermediate lever of a variable valve train

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DE10235402A1 (en) 2004-02-12
EP1387049A1 (en) 2004-02-04

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