WO2011003867A1 - Cam follower - Google Patents
Cam follower Download PDFInfo
- Publication number
- WO2011003867A1 WO2011003867A1 PCT/EP2010/059564 EP2010059564W WO2011003867A1 WO 2011003867 A1 WO2011003867 A1 WO 2011003867A1 EP 2010059564 W EP2010059564 W EP 2010059564W WO 2011003867 A1 WO2011003867 A1 WO 2011003867A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- lever
- side walls
- valve contact
- bolt
- contact element
- 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.)
- Ceased
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
- F01L1/185—Overhead end-pivot rocking arms
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
- F01L2001/187—Clips, e.g. for retaining rocker arm on pivot
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- 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
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- 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 drag lever for actuating a gas exchange valve of an internal combustion engine, with a first end of the lever, on which a valve contact surface for the gas exchange valve extends, and with a lever center, in which a roller bolt and a roller mounted thereon for tapping a cam, and with a second lever end, on which a joint socket for the pivotable mounting of the finger lever runs on a stationary in the internal combustion engine arranged condyle.
- the rocker arm has two longitudinally spaced-apart side walls, which are manufactured as individual parts and at the first end of the lever by a salient to the side walls valve contact element, in the middle of the lever held in alignment with one another through holes of the side walls rolling pin and at the second end of the lever by a the sidewalls salved joint cup element are interconnected.
- rocker arm with a lever body assembled from several individual parts has already been proposed in DE 10 2005 057 298 A1, which is considered to be generic.
- rocker arms with lever bodies which are converted from a single sheet metal blank to the finished part in a multi-stage stamping and bending process and which, due to their dimensioning, can be used in only one specific valve train kinematics
- the modular design of the multi-part lever body enables maximizing te flexibility with regard to the adaptation of the finger lever to different valve train kinematics while minimizing the production of sample and large series tools. So it is for example possible to equip differently sized rocker arms on the modular principle with identical valve contact elements, rollers and socket elements and only adapt the side walls to the specific application.
- a disadvantage of the cited prior art is the joining technique proposed there for connecting the side walls with the valve contact element and the socket element, which are fixed there in the manner of a tongue and groove connection to the side walls. Because such a connection is in view of the precision that is required for the dynamic fatigue strength of valve train components, only with a correspondingly high and costly manufacturing effort represented.
- the object of the invention is therefore to constructively improve a drag lever of the aforementioned type so that the cited disadvantages are eliminated.
- this object is achieved in that the side walls at the first end of the lever and the second end of the lever with each other in pairs aligned through holes are provided, in which the Ventilkon- contact element and the socket element are each supported by transversely of the side walls facing bolt ends or bolt stumps in the manner of a bolt-hole connection.
- Figures 1 shows a first embodiment of a finger lever according to the invention
- Figures 2 shows a second embodiment of a finger lever according to the invention
- Figures 3 shows a third embodiment of a finger lever according to the invention
- FIG. 4 shows a fourth embodiment of a Schlepphe- lever according to the invention
- Figures 5 shows a fifth embodiment of a finger lever according to the invention
- 6 shows a sixth embodiment of a finger lever according to the invention
- FIG. 7 shows a seventh embodiment of a finger lever according to the invention.
- FIG. 8 shows an eighth embodiment of a finger lever according to the invention
- FIG. 9 shows a ninth embodiment of a finger lever according to the invention.
- FIG. 10 shows a tenth embodiment of a finger lever according to the invention
- FIG. 11 shows an eleventh embodiment of a finger lever according to the invention.
- Figure 12 shows a detail of a finger follower valve train with various valve train kinematics and modularly adapted towing levers.
- FIGURE 12 The starting point of the following explanations is shown in FIGURE 12, in which drag levers 1, 1 'and 1 "designed to operate gas exchange valves in internal combustion engines for different valvetrain kinematics are shown in a single image according to the modular principle of the present invention
- Valve contact surface 3 for actuating the gas exchange valve 4 and at a second end of the lever 5 of the finger follower extends a socket for pivotally mounting the rocker arms on a joint head of a stationary arranged in the internal combustion engine support member 6.
- the socket and condyle are hidden in the illustration, but as A roller bolt 8 and a roller 9 mounted thereon (rolling or sliding) extend in the middle of the lever 7 and extend as a ball-shaped recess a cam 10 picks up friction.
- the adjustment of the drag levers 1, 1 'and 1 "to the different valve lift kinematics is achieved in that the drag levers have only a pair of differently shaped side walls 11, 11' and 11", while the other components are identical parts ,
- the drag levers 1, 1 'and 1 correspond to the embodiment of the invention shown in FIGS. 8 and explained below.
- Figure 1 shows a drag lever 1 a in the assembled state.
- the towing lever 1a is composed of two side walls 11a extending parallel to one another in the longitudinal direction thereof, a valve contact element 12a with the valve contact surface 3 extending thereon, a socket element 13a with the socket 14 running therein, the roller bolt 8 and the roller 9 mounted thereon.
- the side walls 11 a produced as stamped items made of sheet metal material are apparent from Figure 1 a. They have at the lever ends 2, 5 and in the lever center 7 in pairs mutually aligned through holes 15a, 16a and 17, in which the valve contact element 12a, the socket element 13a and the roller pin 8 are supported in the manner of a bolt-hole connection and the Connect side walls 11a together.
- valve contact element 12a and the joint socket element 13a are each made as a sintered part and are shown in an enlarged view of Figures 1 b and 1 c.
- Both elements 12a, 13a are provided with pin stubs 18a and 19a of cylindrical shape formed integrally thereon and pointing in the transverse direction of the side walls 11a, which are inserted into the circular passage openings 15a, 16a and the elements 12a, 13a by means of frontal riveting of the bolt stubs 18a, 19a frictionally non-rotatably on the side walls 11 a support.
- the drag lever 1 b shown in Figures 2 has, according to Figure 2a side walls 11 b, the through holes 15 b, 16 b are formed at the two ends of the lever 2, 5 non-circular and oval here.
- a valve contact element 12 b (see FIG. 2 b)
- a bolt is provided with a cross-sectional shape which is complementary to the through-openings 15 b, ie its generally oval cross-section, the center section of which is recessed to form the convex valve contact surface 3.
- the joint socket element 13b shown in FIG. 2c is provided with pin stubs 19b formed integrally thereon, which are also complementary to the through openings 16b with an oval cross section.
- the respective oval pin ends 18b and pin stubs 19b cause the valve contact element 12b and the joint socket element 13b to be held in a form-fitting manner in a rotationally fixed manner in the through-openings 15b and 16b.
- the rivet connection of the end face also riveted bolt ends 18b and bolt stubs 19b has a good strength.
- the disclosed in Figures 3 drag lever 1 c also has a positive rotation of the valve contact element 12c and the socket member 13c relative to the side walls 11 c with good strength. While the through holes 15c, 16c are circular as in the finger lever 1a for receiving cylindrical pin ends 18c and 19c, the interlock is provided by providing the members 12c and 13c on both sides with projections 20c and 21c extending transversely of the side walls 11c, which engage in complementary recesses 22 and 23 at the lower edges of the side walls 11 c (ie, the gas exchange valve side facing).
- the valve contact element 12c and the joint socket element 13c are produced with the projections 20c and 21c as one-piece sintered parts and are shown enlarged in FIGS. 3a and 3b, respectively.
- the elements 12c, 13c are each provided with a transverse bore 24 and 25, through which a cylindrical bore 26 and 27 is guided in each case during assembly of the finger lever 1c, whose bolt ends 18c and 19c serve to support the elements 12c, 13c serve in the through holes 15c, 16c.
- An advantage of the rocker arms 1 a to 1 c is the small number of items.
- valve contact element 12 and the joint socket element 13 are held rotatably on the side walls 11 in the transverse direction of the finger lever 1.
- a resulting advantage is the relatively low wear between the valve contact surface 3 and the gas exchange valve 4.
- the secured against rotation arrangement of the elements 12, 13 has the advantage over that the relationship between the Nockenhubkurve and the valve lift is not changed.
- the drag lever 1d shown in Figures 4 has side walls 11d according to Figure 4a, which are provided at the lever ends 2, 5 with circular passage openings 15d, 16d.
- the valve contact element 12d according to FIG. 4b and the joint socket element 13d according to FIG. 4c are provided with transverse bores 24, 25 for receiving cylindrical bolts 26, 27, but their bolt ends 18d, 19d in this case with a clearance-adapted clearance in the through-openings 15d , 16d, so that the elements 12d, 13d in the transverse direction of the finger lever 1d free, ie are held at an arbitrary angle, rotatably on the side walls 11d.
- Advantage of this embodiment is the simple production of the cam lever 1d.
- valve contact element 12 and the socket element 13 extending in the transverse direction of the side walls 11 projections 28 and 29 are provided for limiting the rotation of the valve contact element 12 and the socket member 13 at stop surfaces 30 and 31 of the side walls 11 start.
- the valve contact elements 12 and the joint socket elements 13 with transverse bores 24, 25 for receiving zy- lindrischer bolts 26, 27 are provided, the bolt ends 18, 19 with low-clearance clearance in the through holes 15, 16 extend.
- the drag lever 1f shown in FIG. 6 has a valve contact element 12f according to FIG. 6b and a joint socket element 13f according to FIG. 6c, each having a T-shaped cross-section and corresponding parallelepipedal projections 28f, 29f, opposite the upper edges serving as abutment surfaces 3Of, 31f of the side walls 11 f according to FIG. 6 a (ie, the side facing away from the gas exchange valve) with a play clearance of approximately 0.2 mm here.
- the drag lever 1g shown in Figures 7 has a valve contact element 12g according to Figure 7a and a socket element 13g of Figure 7b also with T-shaped cross-section and corresponding cuboid projections 28g, 29g, which in this case opposite serving as abutment surfaces 30g, 31g Bottom edges of the side walls 11g run here with about 0.2 mm distance play.
- the drag lever 1 h shown in Figures 8 differs from the drag lever 1g only in that the lower edges of the side walls 11 h facing contact surfaces 34, 35 formed on the valve contact element 12h and the socket element 13h projections 28h, 29h not flat, but convex are, as it is clear from a comparison of Figures 7a with 8a and 7b with 8b.
- the drag lever 1 i substantially corresponds to the drag lever 1 h, the tion about a connecting element 36 for captive holding tion of the socket 14 on the joint head of the support member 6 (see FIG. 12).
- the connection element 36 shown in FIG. 9a and known per se consists of stamped thin sheet metal, the upwardly pointing legs 37 and 38 being latched into longitudinal recesses 39 and 40 of a joint socket element 13i adapted according to FIG. 9a.
- the drag lever 1 k disclosed in FIGS. 10 a has, according to FIG. 10 a, a joint socket element 13 k which is fabric-saving in relation to the joint socket element 13 i.
- the drag lever 11 disclosed in FIGS. 11 has a sinter-fitting valve contact element 121 according to FIG. 11 a and a sintered joint element 13I according to FIG. 11 b.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Mechanically-Actuated Valves (AREA)
Abstract
Description
Bezeichnung der Erfindung Schlepphebel Designation of the invention drag lever
Beschreibung description
Gebiet der Erfindung Field of the invention
Die Erfindung betrifft einen Schlepphebel zur Betätigung eines Gaswechselventils einer Brennkraftmaschine, mit einem ersten Hebelende, an dem eine Ventil- kontaktfläche für das Gaswechselventil verläuft, und mit einer Hebelmitte, in der ein Rollenbolzen und eine darauf gelagerte Rolle zum Abgriff eines Nockens verläuft, sowie mit einem zweiten Hebelende, an dem eine Gelenkpfanne zur schwenkbeweglichen Lagerung des Schlepphebels auf einem stationär in der Brennkraftmaschine angeordneten Gelenkkopf verläuft. Der Schlepphebel weist zwei in dessen Längsrichtung zueinander beabstandet verlaufende Seitenwände auf, die als Einzelteile hergestellt sind und am ersten Hebelende durch ein an den Seitenwänden gehaltertes Ventilkontaktelement, in der Hebelmitte durch den in zueinander fluchtenden Durchgangsöffnungen der Seitenwände gehalterten Rollenbolzen und am zweiten Hebelende durch ein an den Seitenwänden gehaltertes Gelenkpfannenelement miteinander verbunden sind. The invention relates to a drag lever for actuating a gas exchange valve of an internal combustion engine, with a first end of the lever, on which a valve contact surface for the gas exchange valve extends, and with a lever center, in which a roller bolt and a roller mounted thereon for tapping a cam, and with a second lever end, on which a joint socket for the pivotable mounting of the finger lever runs on a stationary in the internal combustion engine arranged condyle. The rocker arm has two longitudinally spaced-apart side walls, which are manufactured as individual parts and at the first end of the lever by a salient to the side walls valve contact element, in the middle of the lever held in alignment with one another through holes of the side walls rolling pin and at the second end of the lever by a the sidewalls salved joint cup element are interconnected.
Hintergrund der Erfindung Background of the invention
Ein derartiger Schlepphebel mit einem aus mehreren Einzelteilen zusammen- gebauten Hebelkörper ist bereits in der als gattungsbildend betrachteten DE 10 2005 057 298 A1 vorgeschlagen. Im Gegensatz zu Schlepphebeln mit Hebelkörpern, die in einem mehrstufigen Stanz-Biege-Prozess aus einer einzigen Blechplatine zum Fertigteil umgeformt werden und die aufgrund ihrer Dimensionierung in lediglich einer spezifischen Ventiltriebskinematik einsetzbar sind, er- möglicht die modulare Bauweise des mehrteiligen Hebelkörpers eine maximier- te Flexibilität im Hinblick auf die Anpassung des Schlepphebels an unterschiedliche Ventiltriebskinematiken bei gleichzeitig minimiertem Herstellaufwand für Muster- und Großserienwerkzeuge. So ist es beispielsweise möglich, verschieden dimensionierte Schlepphebel nach dem Baukastenprinzip mit identischen Ventilkontaktelementen, Rollen und Gelenkpfannenelementen auszustatten und lediglich die Seitenwände an den spezifischen Einsatzfall anzupassen. Such a rocker arm with a lever body assembled from several individual parts has already been proposed in DE 10 2005 057 298 A1, which is considered to be generic. In contrast to rocker arms with lever bodies, which are converted from a single sheet metal blank to the finished part in a multi-stage stamping and bending process and which, due to their dimensioning, can be used in only one specific valve train kinematics, the modular design of the multi-part lever body enables maximizing te flexibility with regard to the adaptation of the finger lever to different valve train kinematics while minimizing the production of sample and large series tools. So it is for example possible to equip differently sized rocker arms on the modular principle with identical valve contact elements, rollers and socket elements and only adapt the side walls to the specific application.
Nachteilig am eingangs zitierten Stand der Technik ist die dort vorgeschlagene Fügetechnik zur Verbindung der Seitenwände mit dem Ventilkontaktelement und dem Gelenkpfannenelement, die dort nach Art einer Feder-Nut-Verbindung an den Seitenwänden befestigt sind. Denn eine derartige Verbindung ist im Hinblick auf die Präzision, die für die dynamische Dauerfestigkeit von Ventiltriebsbauteilen erforderlich ist, nur mit entsprechend hohem und kostenintensivem Herstellaufwand darstellbar. A disadvantage of the cited prior art is the joining technique proposed there for connecting the side walls with the valve contact element and the socket element, which are fixed there in the manner of a tongue and groove connection to the side walls. Because such a connection is in view of the precision that is required for the dynamic fatigue strength of valve train components, only with a correspondingly high and costly manufacturing effort represented.
Aus der EP 1 500 794 A1 geht ein ebenfalls gebauter Schlepphebel mit einem als Einzelteil hergestellten Ventilkontaktelement hervor. Dieses ist in zueinander fluchtenden Durchgangsöffnungen der Seitenwände nach Art einer Bolzen- Bohrung-Verbindung schwimmend und begrenzt drehbar gelagert. Jedoch sind die Seitenwände einstückig mit dem die Seitenwände verbindenden Gelenkpfannenelement umgeformt, so dass die oben genannte Flexibilität des Schlepphebels bezüglich dessen Anpassung an unterschiedliche Ventiltriebskinematiken nicht oder in nicht ausreichendem Maße gegeben ist. Aufgabe der Erfindung From EP 1 500 794 A1, a likewise constructed rocker arm with a valve contact element produced as an individual part emerges. This is floating and limited rotatably mounted in mutually aligned through holes of the side walls in the manner of a bolt-hole connection. However, the side walls are integrally formed with the joint connecting the side walls socket element, so that the above-mentioned flexibility of the finger lever with respect to its adaptation to different Ventiltriebskinematiken is not or not sufficiently given. Object of the invention
Aufgabe der Erfindung ist es daher, einen Schlepphebel der vorgenannten Art konstruktiv so zu verbessern, dass die zitierten Nachteile beseitigt sind. Zusammenfassung der Erfindung The object of the invention is therefore to constructively improve a drag lever of the aforementioned type so that the cited disadvantages are eliminated. Summary of the invention
Erfindungsgemäß wird diese Aufgabe dadurch gelöst, dass die Seitenwände am ersten Hebelende und am zweiten Hebelende mit paarweise zueinander fluchtenden Durchgangsöffnungen versehen sind, in welchen das Ventilkon- taktelement und das Gelenkpfannenelement jeweils mittels in Querrichtung der Seitenwände weisender Bolzenenden oder Bolzenstümpfe nach Art einer Bolzen-Bohrung-Verbindung gehaltert sind. According to the invention, this object is achieved in that the side walls at the first end of the lever and the second end of the lever with each other in pairs aligned through holes are provided, in which the Ventilkon- contact element and the socket element are each supported by transversely of the side walls facing bolt ends or bolt stumps in the manner of a bolt-hole connection.
Durch die in den Unteransprüchen aufgezeigten Maßnahmen sind zweckmäßige, teils alternative Ausgestaltungen der Erfindung angegeben, die im Zusammenhang mit den weiteren Merkmalen und Vorteilen der Erfindung nachfolgend anhand mehrerer Zeichnungen näher dargestellt und erläutert werden. Sofern möglich und zweckmäßig, können diese Merkmale über die dargestellten Ausführungen hinaus auch beliebig miteinander kombiniert werden. By the measures indicated in the dependent claims expedient, some alternative embodiments of the invention are given, which are illustrated and explained in more detail below in connection with the other features and advantages of the invention with reference to several drawings. As far as possible and expedient, these features beyond the embodiments shown can also be combined with each other as desired.
Weitere, nicht dargestellte Ausgestaltungen betreffen nach dem erfindungsgemäßen Baukastenprinzip zusammengesetzte Kipphebel, die im Gegensatz zu Schlepphebeln nicht endseitig, sondern in der Hebelmitte schwenkbeweglich gelagert sind. Further, not shown embodiments relate to the modular system according to the invention composite rocker arm, which are not pivotally mounted in contrast to rocker arms, but in the center of the lever.
Kurze Beschreibung der Zeichnungen Es zeigen jeweils in räumlich perspektivischer Ansicht einen Schlepphebel im Zusammenbau und dessen Einzelteile: BRIEF DESCRIPTION OF THE DRAWINGS In a perspective view in each case, a drag lever in the assembly and its individual parts are shown:
Figuren 1 eine erste Ausgestaltung eines erfindungsgemäßen Schlepphebels; Figures 1 shows a first embodiment of a finger lever according to the invention;
Figuren 2 eine zweite Ausgestaltung eines erfindungsgemäßen Schlepphebels; Figures 2 shows a second embodiment of a finger lever according to the invention;
Figuren 3 eine dritte Ausgestaltung eines erfindungsgemäßen Schlepphebels; Figures 3 shows a third embodiment of a finger lever according to the invention;
Figuren 4 eine vierte Ausgestaltung eines erfindungsgemäßen Schlepphe- bels; 4 shows a fourth embodiment of a Schlepphe- lever according to the invention;
Figuren 5 eine fünfte Ausgestaltung eines erfindungsgemäßen Schlepphebels; Figuren 6 eine sechste Ausgestaltung eines erfindungsgemäßen Schlepphebels; Figures 5 shows a fifth embodiment of a finger lever according to the invention; 6 shows a sixth embodiment of a finger lever according to the invention;
Figuren 7 eine siebte Ausgestaltung eines erfindungsgemäßen Schlepphebels; 7 shows a seventh embodiment of a finger lever according to the invention;
Figuren 8 eine achte Ausgestaltung eines erfindungsgemäßen Schlepphebels; 8 shows an eighth embodiment of a finger lever according to the invention;
Figuren 9 eine neunte Ausgestaltung eines erfindungsgemäßen Schlepphebels; 9 shows a ninth embodiment of a finger lever according to the invention;
Figuren 10 eine zehnte Ausgestaltung eines erfindungsgemäßen Schlepphebels; 10 shows a tenth embodiment of a finger lever according to the invention;
Figuren 11 eine elfte Ausgestaltung eines erfindungsgemäßen Schlepphebels und 11 shows an eleventh embodiment of a finger lever according to the invention and
Figur 12 einen Ausschnitt eines Schlepphebel-Ventiltriebs mit verschiedenen Ventiltriebskinematiken und modular daran angepassten Schlepphebeln. Figure 12 shows a detail of a finger follower valve train with various valve train kinematics and modularly adapted towing levers.
Sofern nicht anders erwähnt, sind gleiche oder funktionsgleiche Bauteile oder Merkmale mit gleichen Bezugszahlen versehen. Unless otherwise stated, the same or functionally identical components or features are provided with the same reference numbers.
Ausführliche Beschreibung der Zeichnungen Detailed description of the drawings
Ausgangspunkt der nachfolgenden Erläuterungen ist Figur 12, in der nach dem erfindungsgemäßen Baukastenprinzip konstruierte Schlepphebel 1 , 1 ' und 1 " zur Betätigung von Gaswechselventilen in Brennkraftmaschinen für unter- schiedliche Ventiltriebskinematiken in einem einzigen Bild dargestellt sind. An einem ersten Hebelende 2 der Schlepphebel verläuft eine Ventil kontaktfläche 3 zur Betätigung des Gaswechselventils 4, und an einem zweiten Hebelende 5 der Schlepphebel verläuft eine Gelenkpfanne zur schwenkbeweglichen Lagerung der Schlepphebel auf einem Gelenkkopf eines stationär in der Brennkraft- maschine angeordneten Abstützelements 6. Gelenkpfanne und Gelenkkopf sind in der Darstellung verdeckt, jedoch als an sich bekannte kalottenförmige Ausnehmung bzw. als Kugelkopf ausgeführt. In der Hebelmitte 7 verläuft ein Rollenbolzen 8 und eine darauf (wälz- oder gleit-) gelagerte Rolle 9, die den Hub eines Nockens 10 reibungsarm abgreift. Erfindungsgemäß wird die Anpassung der Schlepphebel 1 , 1 ' und 1 " an die unterschiedlichen Ventilthebskinematiken dadurch erreicht, dass die Schlepphebel lediglich ein Paar unterschiedlich gestalteter Seitenwände 11 , 11 ' und 11 " aufweisen, während es sich bei den übri- gen Komponenten um Gleichteile handelt. Konstruktiv entsprechen die Schlepphebel 1 , 1 ' und 1 " der in den Figuren 8 dargestellten und später erläuterten Ausgestaltung der Erfindung. The starting point of the following explanations is shown in FIGURE 12, in which drag levers 1, 1 'and 1 "designed to operate gas exchange valves in internal combustion engines for different valvetrain kinematics are shown in a single image according to the modular principle of the present invention Valve contact surface 3 for actuating the gas exchange valve 4, and at a second end of the lever 5 of the finger follower extends a socket for pivotally mounting the rocker arms on a joint head of a stationary arranged in the internal combustion engine support member 6. The socket and condyle are hidden in the illustration, but as A roller bolt 8 and a roller 9 mounted thereon (rolling or sliding) extend in the middle of the lever 7 and extend as a ball-shaped recess a cam 10 picks up friction. According to the invention, the adjustment of the drag levers 1, 1 'and 1 "to the different valve lift kinematics is achieved in that the drag levers have only a pair of differently shaped side walls 11, 11' and 11", while the other components are identical parts , In terms of design, the drag levers 1, 1 'and 1 "correspond to the embodiment of the invention shown in FIGS. 8 and explained below.
Figur 1 zeigt einen Schlepphebel 1 a im fertig montierten Zustand. Der Schlepp- hebel 1a ist aus zwei in dessen Längsrichtung zueinander parallel beabstandet verlaufenden Seitenwänden 11 a, einem Ventilkontaktelement 12a mit der darauf verlaufenden Ventilkontaktfläche 3, einem Gelenkpfannenelement 13a mit der darin verlaufenden Gelenkpfanne 14, dem Rollenbolzen 8 und der darauf gelagerten Rolle 9 zusammengesetzt. Die als gestanzte Einzelteile aus Blech- Werkstoff hergestellten Seitenwände 11 a gehen aus Figur 1 a hervor. Sie weisen an den Hebelenden 2, 5 und in der Hebelmitte 7 paarweise zueinander fluchtende Durchgangsöffnungen 15a, 16a und 17 auf, in welchen das Ventilkontaktelement 12a, das Gelenkpfannenelement 13a bzw. der Rollenbolzen 8 nach Art einer Bolzen-Bohrung-Verbindung gehaltert sind und die Seitenwände 11a miteinander verbinden. Figure 1 shows a drag lever 1 a in the assembled state. The towing lever 1a is composed of two side walls 11a extending parallel to one another in the longitudinal direction thereof, a valve contact element 12a with the valve contact surface 3 extending thereon, a socket element 13a with the socket 14 running therein, the roller bolt 8 and the roller 9 mounted thereon. The side walls 11 a produced as stamped items made of sheet metal material are apparent from Figure 1 a. They have at the lever ends 2, 5 and in the lever center 7 in pairs mutually aligned through holes 15a, 16a and 17, in which the valve contact element 12a, the socket element 13a and the roller pin 8 are supported in the manner of a bolt-hole connection and the Connect side walls 11a together.
Das Ventilkontaktelement 12a und das Gelenkpfannenelement 13a sind jeweils als Sinterteil hergestellt und gehen in vergrößerter Darstellung aus den Figuren 1 b bzw. 1 c hervor. Wie es ebenfalls für die nachfolgend erläuterten Ausgestal- tungen der Erfindung gemäß den Figuren 2 bis 11 zutrifft, sind alternativ auch andere urformende Herstellverfahren wie Metallspritzgießen, Gießen, Fließpressen, Schmieden, etc. denkbar. Beide Elemente 12a, 13a sind mit einstückig daran ausgebildeten und in Querrichtung der Seitenwände 11a weisenden Bolzenstümpfen 18a bzw. 19a mit zylindrischer Form versehen, die in die kreisför- migen Durchgangsöffnungen 15a, 16a eingesteckt sind und die Elemente 12a, 13a mittels stirnseitigem Vernieten der Bolzenstümpfe 18a, 19a kraftschlüssig verdrehfest an den Seitenwänden 11 a haltern. Der in den Figuren 2 dargestellte Schlepphebel 1 b weist gemäß Figur 2a Seitenwände 11 b auf, dessen Durchgangsöffnungen 15b, 16b an den beiden Hebelenden 2, 5 nicht-kreisförmig und hier oval ausgebildet sind. Als Ventilkontaktelement 12b (siehe Figur 2b) ist ein Bolzen mit einer zu den Durchgangsöff- nungen 15b komplementären, d.h. generell ovalen Querschnittsform vorgesehen, dessen Mittelabschnitt zur Bildung der konvexen Ventilkontaktfläche 3 ausgespart ist. Das in Figur 2c dargestellte Gelenkpfannenelement 13b ist mit einstückig daran ausgebildeten Bolzenstümpfen 19b versehen, die mit einem ovalen Querschnitt ebenfalls komplementär zu den Durchgangsöffnungen 16b sind. Die jeweils ovalen Bolzenenden 18b und Bolzenstümpfe 19b bewirken, dass das Ventilkontaktelement 12b und das Gelenkpfannenelement 13b formschlüssig verdrehfest in den Durchgangsöffnungen 15b und 16b gehaltert ist. Insofern weist die Nietverbindung der stirnseitig ebenfalls vernieteten Bolzenenden 18b und Bolzenstümpfe 19b eine gute Festigkeit auf. The valve contact element 12a and the joint socket element 13a are each made as a sintered part and are shown in an enlarged view of Figures 1 b and 1 c. As is also true for the embodiments of the invention according to FIGS. 2 to 11 explained below, other primary forming methods such as metal injection molding, casting, extrusion, forging, etc. are also conceivable. Both elements 12a, 13a are provided with pin stubs 18a and 19a of cylindrical shape formed integrally thereon and pointing in the transverse direction of the side walls 11a, which are inserted into the circular passage openings 15a, 16a and the elements 12a, 13a by means of frontal riveting of the bolt stubs 18a, 19a frictionally non-rotatably on the side walls 11 a support. The drag lever 1 b shown in Figures 2 has, according to Figure 2a side walls 11 b, the through holes 15 b, 16 b are formed at the two ends of the lever 2, 5 non-circular and oval here. As a valve contact element 12 b (see FIG. 2 b), a bolt is provided with a cross-sectional shape which is complementary to the through-openings 15 b, ie its generally oval cross-section, the center section of which is recessed to form the convex valve contact surface 3. The joint socket element 13b shown in FIG. 2c is provided with pin stubs 19b formed integrally thereon, which are also complementary to the through openings 16b with an oval cross section. The respective oval pin ends 18b and pin stubs 19b cause the valve contact element 12b and the joint socket element 13b to be held in a form-fitting manner in a rotationally fixed manner in the through-openings 15b and 16b. In this respect, the rivet connection of the end face also riveted bolt ends 18b and bolt stubs 19b has a good strength.
Der in den Figuren 3 offenbarte Schlepphebel 1 c weist ebenfalls eine formschlüssige Verdrehsicherung des Ventil kontaktelements 12c und des Gelenkpfannenelements 13c gegenüber den Seitenwänden 11 c mit guter Festigkeit auf. Während die Durchgangsöffnungen 15c, 16c wie beim Schlepphebel 1a zur Aufnahme zylindrischer Bolzenenden 18c und 19c kreisförmig sind, erfolgt der Formschluss dadurch, dass die Elemente 12c und 13c an beiden Seiten mit in Querrichtung der Seitenwände 11 c verlaufenden Vorsprüngen 20c und 21 c versehen sind, die in dazu komplementäre Aussparungen 22 und 23 an den Unterkanten der Seitenwände 11 c (d.h. die dem Gaswechselventil zugewandte Seite) eingreifen. Das Ventilkontaktelement 12c und das Gelenkpfannenelement 13c sind mit den Vorsprüngen 20c und 21 c als einstückige Sinterteile hergestellt und gehen vergrößert aus den Figuren 3a bzw. 3b hervor. Die Elemente 12c, 13c sind in diesem Fall jeweils mit einer Querbohrung 24 und 25 versehen, durch die bei der Montage des Schlepphebels 1 c jeweils ein zylindrischer BoI- zen 26 und 27 hindurchgeführt wird, dessen Bolzenenden 18c und 19c zur HaI- terung der Elemente 12c, 13c in den Durchgangsöffnungen 15c, 16c dienen. Vorteilhaft an den Schlepphebeln 1 a bis 1 c ist die geringe Anzahl der Einzelteile. The disclosed in Figures 3 drag lever 1 c also has a positive rotation of the valve contact element 12c and the socket member 13c relative to the side walls 11 c with good strength. While the through holes 15c, 16c are circular as in the finger lever 1a for receiving cylindrical pin ends 18c and 19c, the interlock is provided by providing the members 12c and 13c on both sides with projections 20c and 21c extending transversely of the side walls 11c, which engage in complementary recesses 22 and 23 at the lower edges of the side walls 11 c (ie, the gas exchange valve side facing). The valve contact element 12c and the joint socket element 13c are produced with the projections 20c and 21c as one-piece sintered parts and are shown enlarged in FIGS. 3a and 3b, respectively. In this case, the elements 12c, 13c are each provided with a transverse bore 24 and 25, through which a cylindrical bore 26 and 27 is guided in each case during assembly of the finger lever 1c, whose bolt ends 18c and 19c serve to support the elements 12c, 13c serve in the through holes 15c, 16c. An advantage of the rocker arms 1 a to 1 c is the small number of items.
Bei den nachfolgend erläuterten Ausführungsbeispielen gemäß den Figuren 4 bis 11 sind das Ventilkontaktelement 12 und das Gelenkpfannenelement 13 in Querrichtung des Schlepphebels 1 verdrehbar an den Seitenwänden 11 gehaltert. Ein sich hieraus ergebender Vorteil ist der vergleichsweise geringe Verschleiß zwischen der Ventilkontaktfläche 3 und dem Gaswechselventil 4. Die gegen Verdrehen gesicherte Anordnung der Elemente 12, 13 weist demgegenüber den Vorteil auf, dass das Verhältnis zwischen der Nockenhubkurve und der Ventilhubkurve nicht geändert wird. In the exemplary embodiments explained below according to FIGS. 4 to 11, the valve contact element 12 and the joint socket element 13 are held rotatably on the side walls 11 in the transverse direction of the finger lever 1. A resulting advantage is the relatively low wear between the valve contact surface 3 and the gas exchange valve 4. The secured against rotation arrangement of the elements 12, 13 has the advantage over that the relationship between the Nockenhubkurve and the valve lift is not changed.
Der in den Figuren 4 dargestellte Schlepphebel 1d weist Seitenwände 11 d gemäß Figur 4a auf, die an den Hebelenden 2, 5 mit kreisförmigen Durchgangsöffnungen 15d, 16d versehen sind. Wie beim Schlepphebel 1c sind das Ventil- kontaktelement 12d gemäß Figur 4b und das Gelenkpfannenelement 13d gemäß Figur 4c mit Querbohrungen 24, 25 zur Aufnahme zylindrischer Bolzen 26, 27 versehen, deren Bolzenenden 18d, 19d in diesem Fall jedoch mit fertigungsgünstiger Spielpassung in den Durchgangsöffnungen 15d, 16d verlaufen, so dass die Elemente 12d, 13d in Querrichtung des Schlepphebels 1d frei, d.h. um einen beliebigen Winkel, verdrehbar an den Seitenwänden 11d gehaltert sind. Vorteil dieser Ausgestaltung ist die einfache Fertigung des Schlepphebels 1d. The drag lever 1d shown in Figures 4 has side walls 11d according to Figure 4a, which are provided at the lever ends 2, 5 with circular passage openings 15d, 16d. As with the rocker arm 1c, the valve contact element 12d according to FIG. 4b and the joint socket element 13d according to FIG. 4c are provided with transverse bores 24, 25 for receiving cylindrical bolts 26, 27, but their bolt ends 18d, 19d in this case with a clearance-adapted clearance in the through-openings 15d , 16d, so that the elements 12d, 13d in the transverse direction of the finger lever 1d free, ie are held at an arbitrary angle, rotatably on the side walls 11d. Advantage of this embodiment is the simple production of the cam lever 1d.
Demgegenüber sind bei den in den Figuren 5 bis 11 dargestellten Schlepphebeln 1 das Ventilkontaktelement 12 und das Gelenkpfannenelement 13 mit in Querrichtung der Seitenwände 11 verlaufenden Vorsprüngen 28 und 29 versehen, die zur Drehbegrenzung des Ventilkontaktelements 12 und des Gelenkpfannenelements 13 an Anschlagflächen 30 und 31 der Seitenwände 11 anlaufen. Wie beim Schlepphebel 1 c und 1d sind die Ventil kontaktelemente 12 und die Gelenkpfannenelemente 13 mit Querbohrungen 24, 25 zur Aufnahme zy- lindrischer Bolzen 26, 27 versehen, deren Bolzenenden 18, 19 mit fertigungsgünstiger Spielpassung in den Durchgangsöffnungen 15, 16 verlaufen. Das Ventil kontaktelement 12e (siehe Figur 5b) und das Gelenkpfannenelement 13e (siehe Figur 5c) des in Figur 5 offenbarten Schlepphebels 1e weisen jeweils an beiden Querseiten zylindrische Vorsprünge 28e, 29e auf, die gemäß der Längsschnittdarstellung des Schlepphebels 1e (siehe Figur 5a) in kreisbo- genförmigen Nuten 32, 33 der einander zugewandten Innenseiten der Seitenwände 11 e verlaufen und an den als Anschlagflächen 3Oe, 31 e dienenden Enden der Nuten 32, 33 anlaufen. In contrast, in the drag levers 1 shown in Figures 5 to 11, the valve contact element 12 and the socket element 13 extending in the transverse direction of the side walls 11 projections 28 and 29 are provided for limiting the rotation of the valve contact element 12 and the socket member 13 at stop surfaces 30 and 31 of the side walls 11 start. As in the drag lever 1 c and 1 d, the valve contact elements 12 and the joint socket elements 13 with transverse bores 24, 25 for receiving zy- lindrischer bolts 26, 27 are provided, the bolt ends 18, 19 with low-clearance clearance in the through holes 15, 16 extend. The valve contact element 12e (see FIG. 5b) and the joint socket element 13e (see FIG. 5c) of the rocker arm 1e disclosed in FIG. 5 each have cylindrical projections 28e, 29e on both lateral sides, which according to the longitudinal sectional view of the rocker lever 1e (see FIG arcuate grooves 32, 33 of the mutually facing inner sides of the side walls 11 e run and at the stop surfaces 3Oe, 31 e serving ends of the grooves 32, 33 start.
Der in den Figuren 6 dargestellte Schlepphebel 1f weist ein Ventilkontaktele- ment 12f gemäß Figur 6b und ein Gelenkpfannenelement 13f gemäß Figur 6c mit jeweils T-förmigem Querschnitt und entsprechend quaderförmigen Vorsprüngen 28f, 29f auf, die gegenüberliegend den als Anschlagflächen 3Of, 31 f dienenden Oberkanten der Seitenwände 11 f gemäß Figur 6a (d.h. die dem Gaswechselventil abgewandte Seite) mit hier etwa 0,2mm Abstand spielbehaf- tet verlaufen. The drag lever 1f shown in FIG. 6 has a valve contact element 12f according to FIG. 6b and a joint socket element 13f according to FIG. 6c, each having a T-shaped cross-section and corresponding parallelepipedal projections 28f, 29f, opposite the upper edges serving as abutment surfaces 3Of, 31f of the side walls 11 f according to FIG. 6 a (ie, the side facing away from the gas exchange valve) with a play clearance of approximately 0.2 mm here.
Der in den Figuren 7 dargestellte Schlepphebel 1g weist ein Ventilkontaktelement 12g gemäß Figur 7a und ein Gelenkpfannenelement 13g gemäß Figur 7b mit ebenfalls jeweils T-förmigem Querschnitt und entsprechend quaderförmigen Vorsprüngen 28g, 29g auf, die in diesem Fall gegenüberliegend den als Anschlagflächen 30g, 31g dienenden Unterkanten der Seitenwände 11g mit hier etwa 0,2mm Abstand spielbehaftet verlaufen. The drag lever 1g shown in Figures 7 has a valve contact element 12g according to Figure 7a and a socket element 13g of Figure 7b also with T-shaped cross-section and corresponding cuboid projections 28g, 29g, which in this case opposite serving as abutment surfaces 30g, 31g Bottom edges of the side walls 11g run here with about 0.2 mm distance play.
Der in den Figuren 8 dargestellte Schlepphebel 1 h unterscheidet sich von dem Schlepphebel 1g lediglich dadurch, dass die den Unterkanten der Seitenwände 11 h zugewandten Anlaufflächen 34, 35 der am Ventilkontaktelement 12h und am Gelenkpfannenelement 13h ausgebildeten Vorsprünge 28h, 29h nicht eben, sondern ballig ausgebildet sind, wie es aus einem Vergleich der Figuren 7a mit 8a und 7b mit 8b deutlich wird. The drag lever 1 h shown in Figures 8 differs from the drag lever 1g only in that the lower edges of the side walls 11 h facing contact surfaces 34, 35 formed on the valve contact element 12h and the socket element 13h projections 28h, 29h not flat, but convex are, as it is clear from a comparison of Figures 7a with 8a and 7b with 8b.
Der Schlepphebel 1 i gemäß den Figuren 9 entspricht im wesentlichen dem Schlepphebel 1 h, der um ein Verbindungselement 36 zur verliersicheren Halte- rung der Gelenkpfanne 14 auf dem Gelenkkopf des Abstützelements 6 (siehe Figur 12) ergänzt ist. Das in Figur 9a dargestellte und an sich bekannte Verbin- dungselement 36 besteht aus stanzgebogenem Dünnblech, wobei die nach o- ben weisenden Schenkel 37 und 38 in Längsaussparungen 39 und 40 eines gemäß Figur 9a angepassten Gelenkpfannenelements 13 i eingerastet sind. The drag lever 1 i according to the figures 9 substantially corresponds to the drag lever 1 h, the tion about a connecting element 36 for captive holding tion of the socket 14 on the joint head of the support member 6 (see FIG. 12). The connection element 36 shown in FIG. 9a and known per se consists of stamped thin sheet metal, the upwardly pointing legs 37 and 38 being latched into longitudinal recesses 39 and 40 of a joint socket element 13i adapted according to FIG. 9a.
Der in den Figuren 10 offenbarte Schlepphebel 1 k weist gemäß Figur 10a ein Gelenkpfannenelement 13k auf, das gegenüber dem Gelenkpfannenelement 13i materialsparender gefertigt ist. Der in den Figuren 11 offenbarte Schlepphebel 11 weist ein sintergerechtes Ventilkontaktelement 121 gemäß Figur 11 a und ein sintergerechtes Gelenkpfannenelement 13I gemäß Figur 11 b auf. The drag lever 1 k disclosed in FIGS. 10 a has, according to FIG. 10 a, a joint socket element 13 k which is fabric-saving in relation to the joint socket element 13 i. The drag lever 11 disclosed in FIGS. 11 has a sinter-fitting valve contact element 121 according to FIG. 11 a and a sintered joint element 13I according to FIG. 11 b.
Bezugszahlen reference numerals
1 Schlepphebel 1 drag lever
2 erstes Hebelende 2 first lever end
3 Ventilkontaktfläche 3 valve contact surface
4 Gaswechselventil 4 gas exchange valve
5 zweites Hebelende 5 second lever end
6 Abstützelement 6 support element
7 Hebelmitte 7 lever center
8 Rollenbolzen 8 roller bolts
9 Rolle 9 roll
10 Nocken 10 cams
11 Seitenwand 11 sidewall
12 Ventilkontaktelement 12 valve contact element
13 Gelenkpfannenelement 13 socket element
14 Gelenkpfanne 14 socket
15 Durchgangsöffnung am ersten Hebelende 15 passage opening at the first end of the lever
16 Durchgangsöffnung am zweiten Hebelende 16 passage opening at the second end of the lever
17 Durchgangsöffnung in der Hebelmitte 17 Through opening in the center of the lever
18 Bolzenende / Bolzenstumpf 18 bolt end / bolt stump
19 Bolzenende / Bolzenstumpf 19 bolt end / bolt stump
20 Vorsprung am Ventilkontaktelement 20 projection on the valve contact element
21 Vorsprung am Gelenkpfannenelement 21 projection on the socket element
22 Aussparung der Seitenwand 22 recess of the side wall
23 Aussparung der Seitenwand 23 recess of the side wall
24 Querbohrung im Ventil kontaktelement 24 transverse bore in the valve contact element
25 Querbohrung im Gelenkpfannenelement 25 transverse bore in the socket element
26 Bolzen für Ventilkontaktelement 26 bolts for valve contact element
27 Bolzen für Gelenkpfannenelement 27 Stud for socket element
28 Vorsprung zur Drehbegrenzung des Ventilkontaktelements 28 projection for rotation limitation of the valve contact element
29 Vorsprung zur Drehbegrenzung des Gelenkpfannenelements29 projection for limiting the rotation of the socket element
30 Anschlagfläche der Seitenwand 31 Anschlagfläche der Seitenwand 30 stop surface of the side wall 31 stop surface of the side wall
32 Nut in der Seiteninnenwand am ersten Hebelende 32 groove in the side inner wall at the first end of the lever
33 Nut in der Seiteninnenwand am zweiten Hebelende33 groove in the side inner wall at the second end of the lever
34 Anlauffläche am Ventilkontaktelement 34 contact surface on the valve contact element
35 Anlauffläche am Gelenkpfannenelement 35 contact surface on the socket element
36 Verbindungselement 36 connecting element
37 Schenkel des Verbindungselements 37 legs of the connecting element
38 Schenkel des Verbindungselements 38 legs of the connecting element
39 Längsausparung am Gelenkpfannenelement 40 Längsausparung am Gelenkpfannenelement 39 Longitudinal recess on the socket element 40 Longitudinal recess on the socket element
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13/322,797 US20120097123A1 (en) | 2009-07-10 | 2010-07-05 | Finger lever |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102009032582.4 | 2009-07-10 | ||
| DE102009032582A DE102009032582A1 (en) | 2009-07-10 | 2009-07-10 | cam follower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2011003867A1 true WO2011003867A1 (en) | 2011-01-13 |
Family
ID=42590738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2010/059564 Ceased WO2011003867A1 (en) | 2009-07-10 | 2010-07-05 | Cam follower |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20120097123A1 (en) |
| CN (1) | CN201539284U (en) |
| DE (1) | DE102009032582A1 (en) |
| WO (1) | WO2011003867A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130186358A1 (en) * | 2012-01-23 | 2013-07-25 | Schaeffler Technologies AG & Co. KG | Roller finger follower with swivelable valve pallet |
| GB201211534D0 (en) * | 2012-06-29 | 2012-08-08 | Eaton Srl | Valve bridge |
| CN105179037A (en) * | 2014-06-12 | 2015-12-23 | 舍弗勒技术股份两合公司 | Air valve compression bar |
| DE102014215129A1 (en) * | 2014-08-01 | 2016-02-04 | Schaeffler Technologies AG & Co. KG | Lever for the valve actuation of an internal combustion engine |
| US10683923B2 (en) | 2017-07-31 | 2020-06-16 | Schaeffler Technologies AG & Co. KG | Rotatable body valve stem contact for switchable roller finger follower |
| CN114080492B (en) * | 2019-05-24 | 2024-02-09 | 伊顿智能动力有限公司 | Finger follower of metal stamping switching roller |
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| US1264083A (en) * | 1917-08-25 | 1918-04-23 | Henri Victor Jules Jouffret | Controlling means. |
| US3610218A (en) * | 1970-04-13 | 1971-10-05 | Roger Owen Durham | Desmodromic valve actuator |
| DE2146951A1 (en) * | 1971-09-20 | 1973-03-22 | Thurner Bayer Druckguss | ROCKER LEVER AND METHOD OF ITS MANUFACTURING |
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|---|---|---|---|---|
| EP0573674B1 (en) * | 1992-01-07 | 1997-04-02 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Roller rocker arm and process for manufacturing the same |
| JP2879511B2 (en) * | 1993-07-07 | 1999-04-05 | 光洋精工株式会社 | Press-made rocker arm and method of manufacturing the same |
| US5806475A (en) * | 1996-03-22 | 1998-09-15 | Hausknecht; Louis A. | Low friction rocker arm assembly |
| US6138625A (en) * | 1998-03-17 | 2000-10-31 | Garrison; John Michael | Compact head assembly for internal combustion engine |
| ITTO20010133A1 (en) * | 2001-02-15 | 2002-08-16 | Eaton Automotive S R L | VALVE FOR INTERNAL COMBUSTION ENGINE VALVE TRAINS. |
-
2009
- 2009-07-10 DE DE102009032582A patent/DE102009032582A1/en not_active Withdrawn
- 2009-11-30 CN CN2009202736762U patent/CN201539284U/en not_active Expired - Lifetime
-
2010
- 2010-07-05 WO PCT/EP2010/059564 patent/WO2011003867A1/en not_active Ceased
- 2010-07-05 US US13/322,797 patent/US20120097123A1/en not_active Abandoned
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|---|---|---|---|---|
| US1264083A (en) * | 1917-08-25 | 1918-04-23 | Henri Victor Jules Jouffret | Controlling means. |
| US3610218A (en) * | 1970-04-13 | 1971-10-05 | Roger Owen Durham | Desmodromic valve actuator |
| DE2146951A1 (en) * | 1971-09-20 | 1973-03-22 | Thurner Bayer Druckguss | ROCKER LEVER AND METHOD OF ITS MANUFACTURING |
| JPH0586818A (en) * | 1991-09-30 | 1993-04-06 | Fuji Oozx Kk | Roller Locker Arm |
| DE19816020A1 (en) * | 1998-04-09 | 1999-10-14 | Volkswagen Ag | Rocker arm |
| EP1500794A1 (en) | 2003-07-23 | 2005-01-26 | EATON AUTOMOTIVE S.p.A. | Metal sheet clip for rocker arm |
| DE102005057298A1 (en) | 2005-12-01 | 2007-06-06 | Schaeffler Kg | Lever-type cam tracker for valve drive has two transverse sectors in form of individual components with modular assembly to side walls |
Also Published As
| Publication number | Publication date |
|---|---|
| US20120097123A1 (en) | 2012-04-26 |
| DE102009032582A1 (en) | 2011-01-13 |
| CN201539284U (en) | 2010-08-04 |
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