EP1387048B1 - Rocking lever for valve drive with variable lift - Google Patents

Rocking lever for valve drive with variable lift 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
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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
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German (de)
French (fr)
Other versions
EP1387048A3 (en
EP1387048A2 (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
PSA Automobiles SA
Original Assignee
Bayerische Motoren Werke AG
Peugeot Citroen Automobiles SA
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Application filed by Bayerische Motoren Werke AG, Peugeot Citroen Automobiles SA filed Critical Bayerische Motoren Werke AG
Publication of EP1387048A2 publication Critical patent/EP1387048A2/en
Publication of EP1387048A3 publication Critical patent/EP1387048A3/en
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Publication of EP1387048B1 publication Critical patent/EP1387048B1/en
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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 ,

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

Description

Die Erfindung betrifft einen Schwenkhebel für einen hubvariablen Ventiltrieb gemäß der Merkmale im Oberbegriff des Patentanspruchs 1.The invention relates to a pivoting lever for a variable-stroke valve drive according to the features in the preamble of patent 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 Hubstellung 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.It is based on the not yet published German patent application DE 101 23 186 out. In this a valve drive device for variable stroke adjustment of a gas exchange valve of an internal combustion engine is described. In the valve drive device, 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. To achieve 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.

Da das erste Rollenelement 4 sowohl auf der Verstelleinrichtung 11 als auch auf der Kulissenbahn abgestützt ist, können bei Verstellung des Schwenkhebels relativ hohe Reibungskräfte auftreten, wodurch erhöhter Verschleiß auftreten kann.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 und DE 1 0016 103 zeigen weitere Ausführungsformen von einem Schwenkhebel für hubvariable Ventiltriebe. EP 1 096 115 and DE 1 0016 103 show further embodiments of a pivot lever for variable-stroke valve trains.

Aufgabe der vorliegenden Erfindung ist es, reibungsmindernde Maßnahmen für einen gattungsgemäßen Schwenkhebel aufzuzeigen.Object of the present invention is to show friction-reducing measures for a generic pivoting lever.

Diese Aufgabe wird durch die Merkmale im kennzeichnenden Teil des Patentanspruchs 1 gelöst.
Die Aufteilung des Rollenelementes in zwei separate Rollenelemente führt dazu, dass in vorteilhafter Weise das erste Rollenelement oder das zweite Rollenelement jeweils nur entweder mit der Kulisse oder mit der Verstelleinheit in Wirkverbindung steht. Fertigungstechnisch bedingte Toleranzen bei der Rollenfertigung können durch diese Anordnung besser ausgeglichen werden, wodurch die innere Reibung und somit der Verschleiß gesenkt wird.This object is solved by the features in the characterizing part of patent claim 1.
The division of the 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.

Bei einer Ausgestaltung gemäß Patentanspruch 2 addieren sich die Lagertoleranzen des ersten Rollenelementes und des zweiten Rollenelementes, wodurch fertigungstechnisch bedingte Toleranzen noch besser ausgeglichen werden können.In an embodiment according to claim 2, the bearing tolerances of the first roller element and the second roller element, whereby production-related tolerances can be even better balanced.

Die aufwendige Ausgestaltung gemäß der Patentansprüche 3 und 4 weist beim Betrieb des Schwenkhebels die geringsten Reibungsverluste und somit den geringsten Verschleiß auf.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.

Die Ausgestaltung gemäß Patentanspruch 5 weist im Betrieb die beste Kraftverteilung sowie die geringste Reibung auf, was wiederum die Lebensdauer erhöht, die innere Reibung, den Verschleiß und den Brennstoffverbrauch der Brennkraftmaschine minimiert.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.

Im Folgenden ist die Erfindung anhand zweier bevorzugter Ausführungsbeispiele in fünf Figuren näher erläutert.

Fig. 1
zeigt einen schematischen Aufbau eines hubvariablen Ventiltriebes,
Fig. 2
zeigt eine Aufsicht auf einen erfindungsgemäßen Schwenkhebel,
Fig. 3
zeigt ein erstes Ausführungsbeispiel anhand eines Schnittes durch den Schwenkhebel,
Fig. 4
zeigt eine zweites Ausführungsbeispiel ebenfalls als Schnitt durch den Schwenkhebel,
Fig. 5
zeigt das zweite Ausführungsbeispiel in einem gegenüber Fig. 4 um 90 ° verdrehten Schnitt durch den Schwenkhebel.
In the following the invention with reference to two preferred embodiments in five figures is explained in more detail.
Fig. 1
shows a schematic structure of a variable-stroke valve drive,
Fig. 2
shows a plan view of a pivot lever according to the invention,
Fig. 3
shows a first embodiment with reference to a section through the pivot lever,
Fig. 4
shows a second embodiment also as a section through the pivot lever,
Fig. 5
shows the second embodiment in a opposite Fig. 4 90 ° twisted section through the pivot lever.

Für die selben Bauteile gelten in den Figuren 1 bis 5 dieselben Bezugszeichen.For the same components apply in the FIGS. 1 to 5 the same reference numerals.

Fig. 1 zeigt einen hubvariablen Ventiltrieb 2, der in einem 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', einem dritten Rollenelement 13, 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 eine Feder 10 und einer Verstelleinrichtung 11. 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 einem hydraulischen Ventilspielausgleichselement, und andererseits auf dem Gaswechselventil 8 ab. Zwischen der Steuerbahn 6 und dem ersten Rollenelement 4 ist an den Schwenkhebel 3 parallel zum ersten Rollenelement 4 das dritte 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 dargestellte Öffnungsstellung. Das erste Rollenelement 4 ist neben der Abstützung auf der Kulissenbahn 5' weiter 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 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. Between the control track 6 and the first roller element 4, the third roller element 13 is arranged parallel to the first roller element 4 on the pivot lever 3. When the camshaft 9 'rotates, the pivoting lever 3 pivots and pushes the gas exchange valve into an open position, not shown, with its lifting cam 6 " Adjusting device 11 is supported, with the oscillating pivot point 4 'of the first roller element 4 parallel to the slide track 5 'can be moved. Such a displacement causes a change in the valve lift.

Fig. 2 zeigt die Seitenansicht eines Schwenkhebels 3 für das erste und das zweite Ausführungsbeispiel. Der Schwenkhebel 3 besteht aus einem in etwa kastenförmigen Gehäuse 3', welches auf einem Ende die Steuerbahn 6, mit der Leerhubkurve 6' und der Hubkurve 6" und auf dem gegenüberliegenden Ende eine erste Bohrung 15, die normal zur Steuerbahn 6 ausgerichtet ist, aufweist. In der ersten Bohrung 15 befindet sich ein erster Bolzen 16. Radial um den ersten Bolzen 16 ist das Rollenelement 4 angeordnet. Zwischen dem Rollenelement 4 und der Steuerbahn 6 befindet sich eine zweite Bohrung 15', in der ein zweiter Bolzen 16' parallel zum ersten Bolzen 16 gelagert ist. Radial am Außenumfang ist um den Bolzen 16' ist das drittes Rollenelement 13 drehbar gelagert. Durch die Achsen der ersten Bohrung 15 und der zweiten Bohrung 15' ist ein Schnitt A-A eingezeichnet. Dieser Schnitt A-A entspricht den Darstellungen in Fig. 3 und Fig. 4 für jeweils ein Ausführungsbeispiel. 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. 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 zeigt einen Schnitt durch die Ebene A-A für ein erstes Ausführungsbeispiel für den Schwenkhebel 3. Im ersten Ausführungsbeispiel ist radial am Außenumfang um den ersten Bolzen 16 ein Wälzlager 17 angeordnet. Radial um dieses Wälzlager 17 ist drehbeweglich das Rollenelement 4, innerhalb des Gehäuses 3' gelagert. Das Rollenelement 4 ist aufgeteilt in zwei erste Rollenelemente 4a und ein zweites Rollenelement 4b. Das Rollenelement 4b erstreckt sich in axialer Richtung über die ganze Länge des Wälzlagers 17, entsprechend einem nicht näher dargestellten Innenmaß des Gehäuses 3'. Radial am Außenumfang des ersten Rollenelements 4b sind die zwei zweiten Rollenelemente 4a drehbeweglich angeordnet. Die zwei ersten Rollenelemente 4a bilden mit dem zweiten Rollenelement 4b ein Gleitlager. Beim Betrieb des hubvariablen Ventiltriebs ist der Schwenkhebel 3 mit dem zweiten Rollenelement 4b an der Verstelleinrichtung 11 abgestützt, während er mit dem ersten Rollenelement 4a auf der Kulissenbahn 5b der Kulisse 5 abrollt. Ansonsten entspricht die Ausführung in Fig. 3 der Ausführung in Fig. 2. Fig. 3 shows a section through the plane AA for a first embodiment of the pivot lever 3. In the first embodiment, 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. During operation of the variable-stroke valve drive, the pivoting lever 3 is supported by the second roller element 4b on the adjusting device 11, while it rolls with the first roller element 4a on the slide track 5b of the slide 5. Otherwise, the execution corresponds to Fig. 3 the execution in Fig. 2 ,

In weiteren Ausführungsbeispielen kann auch nur ein erstes Rollenelement 4a vorgesehen werden, wobei sich dieses dann in axialer Ausrichtung über ca. eine Hälfte des zweiten Rollenelementes 4b erstreckt bzw. in der Mitte des zweiten Rollenelementes 4b angeordnet ist. Auch eine Wälzlagerung des ersten Rollenelementes 4a auf dem zweiten Rollenelement 4b ist möglich.In further embodiments, only a 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 zeigt den Schnitt durch den Schwenkhebel 3 in der Ebene A-A für ein zweites Ausführungsbeispiel. In diesem sind radial am Außenumfang um den ersten Bolzen 16 zwei erste Rollenelemente 4a und ein zweites Rollenelement 4b, vom Gehäuse 3' begrenzt, drehbeweglich gelagert. Diese ersten Rollenelemente 4a und das zweite Rollenelement 4b sind gegenüber dem ersten Ausführungsbeispiel in axialer Richtung nebeneinander angeordnet und verfügen jeweils über ein eigenes Wälzlager 17', 17", 17"' gegenüber dem ersten Bolzen 16. Wie auch im ersten Ausführungsbeispiel steht das erste Rollenelement 4a mit der Verstelleinrichtung 11 in Wirkverbindung, während das zweite Rollenelement 4b mit der Kulissenbahn 5' der Kulisse 5 in Wirkverbindung steht. Zentrisch ist ein Schnitt B-B eingezeichnet, der gegenüber dem Schnitt A-A um 90 ° verdreht ist. Fig. 4 shows the section through the pivot lever 3 in the plane AA for a second embodiment. In this radially on the outer circumference about the first pin 16, 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. As in the first embodiment is the first roller element 4a in operative connection with the adjusting device 11, while the second roller element 4b is in operative connection with the slide track 5 'of the link 5. Centrally a section BB is drawn, which is rotated in relation to the section AA by 90 °.

In einem weiteren Ausführungsbeispiel kann, wie im Fall des ersten Ausführungsbeispieles nur ein einziges erstes Rollenelement 4a vorgesehen sein. Für diesen Fall liegen das erste Rollenelement 4a und das zweite Rollenelement 4b in axialer Richtung des ersten Bolzens 16 wiederum nebeneinander.In a further embodiment, as in the case of the first embodiment, only a single first roller element 4a may be provided. In this case, the 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.

Für alle Ausführungsbeispiele gilt, dass die Wälzlager 17, 17', 17", 17"' als Nadellager und unter Umständen auch als Gleitlager ausgebildet sein können.For all embodiments, it holds that the roller bearings 17, 17 ', 17 ", 17"' can be designed as a needle bearing and under certain circumstances as a sliding bearing.

Fig. 5 zeigt zur Veranschaulichung einen gegenüber Fig. 4 um 90 ° verdrehten Schnitt durch den Schwenkhebel für das zweite Ausführungsbeispiel. Es gilt die Figurenbeschreibung von Fig. 4. 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 ,

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Zylinderkopfcylinder head
22
Hubvariabler VentiltriebHubvariabler valve drive
33
Schwenkhebelpivoting lever
3'3 '
Gehäusecasing
44
Rollenelementroller element
4a4a
Erstes RollenelementFirst roller element
4b4b
Zweites RollenelementSecond 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
Drittes RollenelementThird roller element
1414
SpielausgleichselementLash adjuster
1515
Erste BohrungFirst drilling
15'15 '
Zweite BohrungSecond hole
1616
Erster BolzenFirst bolt
16'16 '
Zweiter BolzenSecond bolt
1717
Wälzlagerroller bearing
17', 17", 17"'17 ', 17 ", 17"'
Separates WälzlagerSeparate rolling bearing

Claims (5)

  1. A rocking lever (3) for a variable-stroke valve drive (2) in a cylinder head (1) of an internal combustion engine, the lever being supported without clearance, on the one hand by a roller element (4) pivoting round a centre (4') on a track (5') on a connecting link (5) and on the other hand by a control track (6) on an intermediate element (7) to form a gas change valve (8), wherein in order to adjust the stroke between the supporting places, on the one hand the lever (3) is pivotable in controlled manner by a cam (9) on a camshaft (9') against the force of a spring (10) and on the other hand the roller element (4) is movable in controlled manner by an adjusting device (11) in order to adjust the length of stroke parallel to the track (5'),
    characterised in that the roller element(4) comprises a first roller element (4a) and a second roller element (4b) or two roller elements (4a) and a second roller element (4b) and is radially mounted on at least one rolling bearing (17).
  2. A lever according to claim 1,
    characterised in that at least one first roller element (4a) is radially mounted on the outer periphery of the second roller element (4b).
  3. A lever according to claim 1,
    characterised in that the first roller element (4a) and the second roller element (4b) are mounted side by side in the axial direction.
  4. A lever according to claim 2 or claim 3,
    characterised the first roller element (4a) and the second roller element (4b) are each disposed on a separate rolling bearing (17a, 17b, 17c).
  5. A lever according to any of the previous claims,
    characterised in that the rolling bearing (17a, 17b, 17c) is a needle bearing.
EP03015068A 2002-08-02 2003-07-03 Rocking lever for valve drive with variable lift Expired - Lifetime EP1387048B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10235403A DE10235403A1 (en) 2002-08-02 2002-08-02 Swivel lever for a variable stroke valve train
DE10235403 2002-08-02

Publications (3)

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

Family

ID=30010568

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03015068A Expired - Lifetime EP1387048B1 (en) 2002-08-02 2003-07-03 Rocking lever for valve drive with variable lift

Country Status (2)

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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103354861A (en) * 2011-02-10 2013-10-16 谢夫勒科技股份两合公司 Intermediate lever
CN106489020A (en) * 2014-07-09 2017-03-08 皮尔伯格有限责任公司 Can Mechanical course valve actuating gear

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004008389A1 (en) * 2004-02-20 2005-09-08 Bayerische Motoren Werke Ag Valve drive for an I.C. engine comprises a first adjusting device with a cam whose radius increases or decreases over a periphery with respect to a rotating axle
DE102006018510A1 (en) * 2006-04-21 2007-10-25 Schaeffler Kg Swinging arm for stroke-variable valve gear of internal combustion engine, has stroke area, where maximum width of stroke area is formed larger or equal to maximum width of idle-stroke area and larger than minimum width of idle-stroke area
DE102006018512A1 (en) * 2006-04-21 2007-10-25 Schaeffler Kg Roller element for a pivotable machine part
JP4766007B2 (en) 2007-06-14 2011-09-07 トヨタ自動車株式会社 Variable valve gear
DE102011003900A1 (en) * 2011-02-10 2012-08-16 Schaeffler Technologies Gmbh & Co. Kg intermediate lever
DE102014100748B4 (en) * 2014-01-23 2017-04-27 Pierburg Gmbh Transmission arrangement for a mechanically controllable valve train and mechanically controllable valve train
DE102015118884A1 (en) * 2015-11-04 2017-05-04 Pierburg Gmbh Mechanically controllable valve train
DE102016122179A1 (en) * 2016-11-18 2018-05-24 Pierburg Gmbh Mechanically controllable valve train

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4223173A1 (en) * 1992-07-15 1994-01-20 Bayerische Motoren Werke Ag Valve mechanism for vehicle IC engine - has different lift curves for each pair of valves per cylinder controlled by roller-actuated eccentrics
DE4322480C2 (en) * 1993-07-06 1996-05-02 Meta Motoren Energietech Device for the variable valve control of internal combustion engines
EP1022443B1 (en) * 1999-01-19 2001-08-08 Ford Global Technologies, Inc. Variable valve drive for internal combustion engine
DE19913742A1 (en) * 1999-03-26 2000-09-28 Bayerische Motoren Werke Ag Device for stroke adjustment of a gas exchange valve in the cylinder head of an internal combustion engine
DE19920512A1 (en) * 1999-05-05 2000-11-09 Opel Adam Ag Device for actuating a valve with a variable stroke on internal combustion engines
EP1096115B1 (en) * 1999-10-29 2002-07-10 STS System Technology Services GmbH Mechanically controlled intake valve lift in an internal combustion engine
DE19960742B4 (en) * 1999-12-16 2006-09-28 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Variable valve train, preferably for internal combustion engines
DE10016103A1 (en) * 2000-03-31 2001-10-04 Audi Ag Variable valve timing
ATE272787T1 (en) * 2001-05-03 2004-08-15 Sts System Technology Services MECHANICAL CONTROL OF THE STROKE ADJUSTMENT OF THE INLET VALVE OF AN INTERNAL COMBUSTION ENGINE
DE10123186A1 (en) 2001-05-12 2002-11-14 Bayerische Motoren Werke Ag Valve gear device for variable lift adjustment is for gas exchange valve of internal combustion engine and has valve vai intermediary of transmission component effectively connected to roller movable around rotary axis

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103354861A (en) * 2011-02-10 2013-10-16 谢夫勒科技股份两合公司 Intermediate lever
CN103354861B (en) * 2011-02-10 2016-08-10 舍弗勒技术股份两合公司 Intermediate bar
CN106489020A (en) * 2014-07-09 2017-03-08 皮尔伯格有限责任公司 Can Mechanical course valve actuating gear
CN106489020B (en) * 2014-07-09 2019-10-01 皮尔伯格有限责任公司 Can Mechanical course valve actuating gear

Also Published As

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

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