EP1375842A1 - Valve arrangement for an internal combustion engine and manufacturing method - Google Patents

Valve arrangement for an internal combustion engine and manufacturing method Download PDF

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Publication number
EP1375842A1
EP1375842A1 EP02100724A EP02100724A EP1375842A1 EP 1375842 A1 EP1375842 A1 EP 1375842A1 EP 02100724 A EP02100724 A EP 02100724A EP 02100724 A EP02100724 A EP 02100724A EP 1375842 A1 EP1375842 A1 EP 1375842A1
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EP
European Patent Office
Prior art keywords
valve
tappet
stem
valve stem
arrangement according
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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.)
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EP02100724A
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German (de)
French (fr)
Inventor
Frank Aust
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Ford Global Technologies LLC
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Ford Global Technologies LLC
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Priority to EP02100724A priority Critical patent/EP1375842A1/en
Publication of EP1375842A1 publication Critical patent/EP1375842A1/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L3/00Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/10Connecting springs to valve members
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12Transmitting gear between valve drive and valve
    • F01L1/14Tappets; Push rods
    • F01L1/143Tappets; Push rods for use with overhead camshafts

Definitions

  • the invention further relates to a method for producing such a valve arrangement.
  • Valve arrangements of the type mentioned are used in internal combustion engines needed to supply fresh air or air-fuel mixtures to the Combustion chambers (cylinders) or the emission of exhaust gases from the To control combustion chambers. Opening and closing the inlets and outlets of the Combustion chambers are usually done by a linearly movable valve element with a valve plate and a valve stem, with a valve spring on the stem exerts a force that urges the valve to the closed position.
  • the valve spring usually surrounds the valve stem in a spiral and engages it indirectly via a valve spring plate.
  • the valve spring plate is in turn over a valve wedge fixed in an annular groove of the valve stem axially on the valve stem established.
  • valve tappet or cup tappet that surrounds the end of the valve stem.
  • a valve deflection device such as the cam of a camshaft - one Force exerted by the valve tappet on the valve stem to generate a clocked Opening movement of the valves transmits.
  • the tappet is not connected to the valve stem, and both on the outside as well as the inside of its bottom are interchangeable shims provided, through the thickness of the valve clearance set as desired can be.
  • the valve clearance is used during the operation of the valve assembly compensate for length fluctuations due to warming.
  • the valve arrangement according to the invention for an internal combustion engine contains a movable valve element with a valve stem and a valve spring.
  • the valve spring is coupled to the valve element to apply a biasing force thereon to exercise, preferably in the direction of the closed position of the valve is directed.
  • the valve arrangement has a valve tappet, which in the assembled state in the power transmission path between valve stem and one Valve deflection device such as a camshaft is arranged. The forces exerted by the valve deflection device to open the valve thus on the valve stem on the valve stem.
  • the valve assembly is characterized in that the valve tappet is axially fixed to the valve stem, and that the valve spring engages at one end on the valve tappet or is supported on this.
  • valve arrangement described has compared to known valve arrangements the advantage that an additional valve spring plate and associated fasteners to fix it on the valve stem can be dispensed with because the already existing valve tappet takes over the function of the valve spring plate. So that this is possible, the valve lifter is axially fixed to the valve stem, see above that the spring force can be transferred from the valve tappet to the valve stem.
  • the resulting structure is very stable on the one hand and considerably lighter on the other as known valve arrangements.
  • the associated with the weight saving Reducing the inertia is of particular importance since the valve element is subject to constant very rapid acceleration.
  • valve lifter can be used to fix one Valve spring plates known methods are attached to the valve stem.
  • valve lifter is welded to the valve stem. Through a such a welding process can produce a particularly firm connection, which at the same time without additional components and without a weakening the valve stem, such as that associated with the insertion of an annular groove would get along.
  • the valve lifter is cup-shaped and arranged overlapping the end of the valve stem. This results in a particularly secure fit of the valve tappet and a additional mechanical protection of the end of the valve stem and those attacking there Valve spring.
  • valve tappet preferably has on the valve deflection device facing side on a shim.
  • a shim By choosing the thickness the shim can adjust the valve clearance according to the design specifications can be set for the respective motor.
  • the shim is preferred in a corresponding recess of the valve tappet force and / or positively mounted. In this place it is easily accessible so that it can be used if necessary can be easily replaced.
  • the valve lifter has a central one Provide opening in which the free end of the valve stem in the assembled state is a perfect fit.
  • the introduction of the valve stem into one Opening creates a positive coupling between the valve stem and valve tappet, which are only supplemented by a relative axial fixation got to.
  • the invention further relates to a method for producing a valve arrangement of the type explained above.
  • the method includes in particular the step that the valve lifter is connected to the valve stem by laser welding.
  • the valve lifter is connected to the valve stem by laser welding.
  • the valve stem Preferably becomes a symmetrical, in particular rotationally symmetrical, axis of the valve stem or circular weld, so that a balanced Distribution of the attack force between the valve tappet and valve stem reached becomes.
  • the single figure shows a schematic cross section of the head of one valve assembly according to the invention.
  • the valve shown in part can be both an inlet valve and also act as an exhaust valve of an internal combustion engine. From the linear back and forth forth movable valve element, only the upper end of the valve stem 1 is shown, since the remaining component is not used to explain the present invention is important.
  • the upper end of the valve stem 1 is from a cup-shaped valve tappet 2 surrounded, which is typically made of iron and for power transmission from a camshaft (not shown) on the valve stem 1.
  • a cup-shaped valve tappet 2 surrounded, which is typically made of iron and for power transmission from a camshaft (not shown) on the valve stem 1.
  • an opening 6 is provided centrally, the edges of which are extended cylindrically towards the inside of the tappet 2.
  • the upper end of the valve stem 1 is arranged. This will be constructive radial fixation between valve stem 1 and tappet 2 is achieved.
  • the upper end of the opening 6 in the figure is annular with the upper End of the valve stem 1 by laser welding along the indicated Welds 7 connected. This creates a symmetrical and very firm Low weight connection between valve lifter 2 and valve element 1 reached.
  • valve tappet 2 which differs from the prior art on the valve stem 1 has the advantage that the valve spring 3, which the valve stem 1 helically surrounds and on this indirectly a biasing force in the direction exercises the closed position of the valve, supported on the bottom 4 of the valve lifter 2 can.
  • valve spring retainer valve spring retainer, valve wedge
  • Weight of the valve assembly can be reduced by typically about 10 g, which in Considering the reduced inertia of the valve is a significant gain.
  • construction described is relatively simple to manufacture as well as particularly robust, in particular the counterplay of forces of valve spring 3 and camshaft can take place directly via the valve lifter 2 without thereby burdening a portion of the valve stem 1.
  • the outside of the bottom 4 of the Valve tappet 2 has a recess in which a shim 5 (for example due to the clamp fit).
  • the shim 5 covers the through hole 6 in the bottom 4 of the valve lifter 2.
  • Their thickness can vary depending on the one you want Valve clearance can be selected when installing the valve assembly, so that a simple adjustment possibility arises.
  • the shim 5 easy to replace if necessary.

Abstract

The tappet (2) has a central opening (6) to accommodate the end of the valve stem (1). The valve stem and tappet are welded (7) together. The cylindrical skirt of the tappet surrounds the end of the valve spring (3), which bears against the flat end of the tappet (4). A shallow cylindrical depression in the end of the tappet accommodates a shim (5) against which a cam or the end of a rocker may bear.

Description

Die Erfindung betrifft eine Ventilanordnung für eine Brennkraftmaschine, enthaltend

  • ein bewegliches Ventilelement mit einem Ventilschaft;
  • eine Ventilfeder, welche mit dem Ventilelement gekoppelt ist, um auf dieses eine Vorspannungskraft auszuüben;
  • einen im Kraftübertragungsweg zwischen Ventilschaft und einer Ventilauslenkeinrichtung angeordneten Ventilstößel.
The invention relates to a valve arrangement for an internal combustion engine, comprising
  • a movable valve element with a valve stem;
  • a valve spring coupled to the valve element to apply a biasing force thereon;
  • a valve tappet arranged in the force transmission path between the valve stem and a valve deflection device.

Ferner betrifft die Erfindung ein Verfahren zur Herstellung einer derartigen Ventilanordnung.The invention further relates to a method for producing such a valve arrangement.

Ventilanordnungen der eingangs genannten Art werden in Brennkraftmaschinen benötigt, um die Zufuhr von Frischluft oder Luft-Kraftstoffgemischen zu den Brennkammern (Zylindern) beziehungsweise den Ausstoß von Abgasen aus den Brennkammern zu steuern. Das Öffnen und Schließen der Ein- und Auslässe der Brennkammern geschieht dabei üblicherweise durch ein linear bewegliches Ventilelement mit einem Ventilteller und einem Ventilschaft, wobei eine Ventilfeder auf den Schaft eine Kraft ausübt, die das Ventil in die Schließstellung drängt. Die Ventilfeder umgibt den Ventilschaft üblicherweise spiralförmig und greift an diesem mittelbar über einen Ventilfederteller an. Der Ventilfederteller ist seinerseits über einen in einer Ringnut des Ventilschaftes fixierten Ventilkeil axial am Ventilschaft festgelegt. Valve arrangements of the type mentioned are used in internal combustion engines needed to supply fresh air or air-fuel mixtures to the Combustion chambers (cylinders) or the emission of exhaust gases from the To control combustion chambers. Opening and closing the inlets and outlets of the Combustion chambers are usually done by a linearly movable valve element with a valve plate and a valve stem, with a valve spring on the stem exerts a force that urges the valve to the closed position. The valve spring usually surrounds the valve stem in a spiral and engages it indirectly via a valve spring plate. The valve spring plate is in turn over a valve wedge fixed in an annular groove of the valve stem axially on the valve stem established.

Des Weiteren weisen bekannte Ventilanordnungen einen Ventilstößel oder Tassenstößel auf, welcher das Ende des Ventilschaftes umgibt. Auf den Ventilstößel übt eine Ventilauslenkeinrichtung - wie z.B. der Nocken einer Nockenwelle - eine Kraft aus, welche der Ventilstößel auf den Ventilschaft zur Erzeugung einer getakteten Öffnungsbewegung der Ventile überträgt. Eine derartige Ventilanordnung mit einem Tassenstößel ist zum Beispiel in der US 5 884 595 beschrieben. Der Tassenstößel ist dabei nicht mit dem Ventilschaft verbunden, und sowohl an der Außenseite als auch der Innenseite seines Bodens sind auswechselbare Einstellscheiben vorgesehen, durch deren Dicke das Ventilspiel nach Wunsch eingestellt werden kann. Das Ventilspiel dient dazu, während des Betriebs der Ventilanordnung aufgrund von Erwärmungen auftretende Längenschwankungen auszugleichen.Furthermore, known valve arrangements have a valve tappet or cup tappet that surrounds the end of the valve stem. On the valve lifter practices a valve deflection device - such as the cam of a camshaft - one Force exerted by the valve tappet on the valve stem to generate a clocked Opening movement of the valves transmits. Such a valve arrangement with a bucket tappet is described, for example, in US Pat. No. 5,884,595. The tappet is not connected to the valve stem, and both on the outside as well as the inside of its bottom are interchangeable shims provided, through the thickness of the valve clearance set as desired can be. The valve clearance is used during the operation of the valve assembly compensate for length fluctuations due to warming.

Vor diesem Hintergrund war es Aufgabe der vorliegenden Erfindung, eine konstruktiv vereinfachte und leichter herstellbare Ventilanordnung bereitzustellen.Against this background, it was an object of the present invention to constructively to provide simplified and easier to manufacture valve assembly.

Diese Aufgabe wird durch eine Ventilanordnung mit den Merkmalen des Anspruchs 1 sowie durch ein Verfahren zu deren Herstellung mit den Merkmalen des Anspruchs 6 gelöst.This object is achieved by a valve arrangement with the features of the claim 1 and by a method for their production with the features of Claim 6 solved.

Vorteilhafte Ausgestaltungen sind in den Unteransprüchen enthalten.Advantageous refinements are contained in the subclaims.

Die erfindungsgemäße Ventilanordnung für eine Brennkraftmaschine enthält ein bewegliches Ventilelement mit einem Ventilschaft sowie eine Ventilfeder. Die Ventilfeder ist mit dem Ventilelement gekoppelt, um auf dieses eine Vorspannungskraft auszuüben, die vorzugsweise in Richtung der Schließstellung des Ventils gerichtet ist. Ferner weist die Ventilanordnung einen Ventilstößel auf, welcher im montierten Zustand im Kraftübertragungsweg zwischen Ventilschaft und einer Ventilauslenkeinrichtung wie zum Beispiel einer Nockenwelle angeordnet ist. Die von der Ventilauslenkeinrichtung zum Öffnen des Ventils ausgeübten Kräfte übertragen sich somit über den Ventilstößel auf den Ventilschaft. Die Ventilanordnung ist dadurch gekennzeichnet, daß der Ventilstößel am Ventilschaft axial fixiert ist, und daß die Ventilfeder mit einem Ende am Ventilstößel angreift beziehungsweise sich hieran abstützt.The valve arrangement according to the invention for an internal combustion engine contains a movable valve element with a valve stem and a valve spring. The valve spring is coupled to the valve element to apply a biasing force thereon to exercise, preferably in the direction of the closed position of the valve is directed. Furthermore, the valve arrangement has a valve tappet, which in the assembled state in the power transmission path between valve stem and one Valve deflection device such as a camshaft is arranged. The forces exerted by the valve deflection device to open the valve thus on the valve stem on the valve stem. The valve assembly is characterized in that the valve tappet is axially fixed to the valve stem, and that the valve spring engages at one end on the valve tappet or is supported on this.

Die beschriebene Ventilanordnung hat gegenüber bekannten Ventilanordnungen den Vorteil, daß auf einen zusätzlichen Ventilfederteller und zugehörige Befestigungselemente zu dessen Fixierung am Ventilschaft verzichtet werden kann, da der ohnehin vorhandene Ventilstößel die Funktion des Ventilfedertellers übernimmt. Damit dies möglich ist, ist der Ventilstößel am Ventilschaft axial fixiert, so daß sich die Federkraft vom Ventilstößel auf den Ventilschaft übertragen kann. Der resultierende Aufbau ist einerseits sehr stabil und andererseits erheblich leichter als bekannte Ventilanordnungen. Die mit der Gewichtsersparnis einhergehende Reduzierung der Trägheit ist dabei von besonderer Bedeutung, da das Ventilelement einer ständigen sehr schnellen Beschleunigung unterworfen ist.The valve arrangement described has compared to known valve arrangements the advantage that an additional valve spring plate and associated fasteners to fix it on the valve stem can be dispensed with because the already existing valve tappet takes over the function of the valve spring plate. So that this is possible, the valve lifter is axially fixed to the valve stem, see above that the spring force can be transferred from the valve tappet to the valve stem. The resulting structure is very stable on the one hand and considerably lighter on the other as known valve arrangements. The associated with the weight saving Reducing the inertia is of particular importance since the valve element is subject to constant very rapid acceleration.

Die axiale Fixierung des Ventilstößels am Ventilschaft kann auf verschiedene Weise erfolgen. Zum Beispiel kann der Ventilstößel mit den für die Fixierung eines Ventilfedertellers bekannten Methoden am Ventilschaft befestigt werden. Vorzugsweise wird der Ventilstößel jedoch am Ventilschaft festgeschweißt. Durch einen derartigen Schweißvorgang läßt sich eine besonders feste Verbindung erzeugen, die gleichzeitig ohne zusätzliche Bauelemente und ohne eine Schwächung des Ventilschaftes, wie sie zum Beispiel mit einem Einlassen einer Ringnut einhergehen würde, auskommt.The axial fixation of the valve tappet on the valve stem can be different Way. For example, the valve lifter can be used to fix one Valve spring plates known methods are attached to the valve stem. Preferably however, the valve lifter is welded to the valve stem. Through a such a welding process can produce a particularly firm connection, which at the same time without additional components and without a weakening the valve stem, such as that associated with the insertion of an annular groove would get along.

Gemäß einer bevorzugten Ausgestaltung der Ventilanordnung ist der Ventilstößel tassenförmig ausgebildet und das Ende des Ventilschaftes übergreifend angeordnet. Hierdurch ergibt sich ein besonders sicherer Sitz des Ventilstößels sowie ein zusätzlicher mechanischer Schutz des Endes des Ventilschaftes und der dort angreifenden Ventilfeder.According to a preferred embodiment of the valve arrangement, the valve lifter is cup-shaped and arranged overlapping the end of the valve stem. This results in a particularly secure fit of the valve tappet and a additional mechanical protection of the end of the valve stem and those attacking there Valve spring.

Weiterhin weist der Ventilstößel vorzugsweise an seiner der Ventilauslenkeinrichtung zugewandten Seite eine Einstellscheibe auf. Durch die Auswahl der Dicke der Einstellscheibe kann das Ventilspiel entsprechend den konstruktiven Vorgaben für den jeweiligen Motor eingestellt werden. Die Einstellscheibe ist vorzugsweise in einer entsprechenden Ausnehmung des Ventilstößels kraft- und/oder formschlüssig gelagert. An diesem Ort ist sie gut zugänglich, so daß sie bei Bedarf leicht ausgewechselt werden kann.Furthermore, the valve tappet preferably has on the valve deflection device facing side on a shim. By choosing the thickness the shim can adjust the valve clearance according to the design specifications can be set for the respective motor. The shim is preferred in a corresponding recess of the valve tappet force and / or positively mounted. In this place it is easily accessible so that it can be used if necessary can be easily replaced.

Gemäß einer bevorzugten Ausgestaltung ist der Ventilstößel mit einer zentrischen Öffnung versehen, in welche das freie Ende des Ventilschaftes im montierten Zustand paßgenau eingeführt ist. Die Einführung des Ventilschaftes in eine derartige Öffnung bewirkt eine formschlüssige Kopplung zwischen Ventilschaft und Ventilstößel, welche lediglich noch durch eine relative axiale Fixierung ergänzt werden muß.According to a preferred embodiment, the valve lifter has a central one Provide opening in which the free end of the valve stem in the assembled state is a perfect fit. The introduction of the valve stem into one Opening creates a positive coupling between the valve stem and valve tappet, which are only supplemented by a relative axial fixation got to.

Die Erfindung betrifft weiterhin ein Verfahren zur Herstellung einer Ventilanordnung der vorstehend erläuterten Art. Neben den an sich bekannten Schritten zur Herstellung der einzelnen für die Ventilanordnung benötigten Bauelemente sowie zu deren Montage enthält das Verfahren insbesondere den Schritt, daß der Ventilstößel durch Laserschweißen mit dem Ventilschaft verbunden wird. Vorzugsweise wird dabei eine zur Achse des Ventilschaftes symmetrische, insbesondere rotationssymmetrische bzw. kreisförmige Schweißnaht erzeugt, so daß eine ausgewogene Verteilung der Angriffskraft zwischen Ventilstößel und Ventilschaft erreicht wird.The invention further relates to a method for producing a valve arrangement of the type explained above. In addition to the known steps for Production of the individual components required for the valve arrangement and for their assembly, the method includes in particular the step that the valve lifter is connected to the valve stem by laser welding. Preferably becomes a symmetrical, in particular rotationally symmetrical, axis of the valve stem or circular weld, so that a balanced Distribution of the attack force between the valve tappet and valve stem reached becomes.

Im Folgenden wird die Erfindung anhand der Figur beispielhaft näher erläutert.In the following, the invention is explained in more detail by way of example with reference to the figure.

Die einzige Figur zeigt in einem schematischen Querschnitt das Kopfende einer erfindungsgemäßen Ventilanordnung.The single figure shows a schematic cross section of the head of one valve assembly according to the invention.

Bei dem teilweise dargestellten Ventil kann es sich sowohl um ein Einlaßventil als auch ein Auslaßventil einer Brennkraftmaschine handeln. Von dem linear hin und her beweglichen Ventilelement ist nur das obere Ende des Ventilschaftes 1 dargestellt, da zur Erläuterung der vorliegenden Erfindung das restliche Bauteil nicht von Bedeutung ist. The valve shown in part can be both an inlet valve and also act as an exhaust valve of an internal combustion engine. From the linear back and forth forth movable valve element, only the upper end of the valve stem 1 is shown, since the remaining component is not used to explain the present invention is important.

Das obere Ende des Ventilschaftes 1 ist von einem tassenförmigen Ventilstößel 2 umgeben, welcher typischerweise aus Eisen hergestellt ist und für die Kraftübertragung von einer Nockenwelle (nicht dargestellt) auf den Ventilschaft 1 sorgt. Im Boden 4 des Ventilstößels 2 ist zentrisch eine Öffnung 6 vorgesehen, deren Ränder zum Inneren des Tassenstößels 2 hin zylindrisch verlängert sind. In der Öffnung 6 ist das obere Ende des Ventilschaftes 1 angeordnet. Hierdurch wird konstruktiv eine radiale Fixierung zwischen Ventilschaft 1 und Tassenstößel 2 erreicht. Um den Tassenstößel 2 zusätzlich auch axial relativ zum Ventilschaft 1 zu fixieren, ist das in der Figur obere Ende der Öffnung 6 ringförmig mit dem oberen Ende des Ventilschaftes 1 durch Laserschweißen entlang der angedeuteten Schweißnähte 7 verbunden. Hierdurch wird eine symmetrische und sehr feste Verbindung geringen Gewichts zwischen Ventilstößel 2 und Ventilelement 1 erreicht.The upper end of the valve stem 1 is from a cup-shaped valve tappet 2 surrounded, which is typically made of iron and for power transmission from a camshaft (not shown) on the valve stem 1. in the Bottom 4 of the valve lifter 2, an opening 6 is provided centrally, the edges of which are extended cylindrically towards the inside of the tappet 2. In the opening 6, the upper end of the valve stem 1 is arranged. This will be constructive radial fixation between valve stem 1 and tappet 2 is achieved. Around the bucket tappet 2 also axially relative to the valve stem 1 fix, the upper end of the opening 6 in the figure is annular with the upper End of the valve stem 1 by laser welding along the indicated Welds 7 connected. This creates a symmetrical and very firm Low weight connection between valve lifter 2 and valve element 1 reached.

Die abweichend zum Stand der Technik erfolgende Fixierung des Ventilstößels 2 am Ventilschaft 1 hat den Vorteil, daß die Ventilfeder 3, welche den Ventilschaft 1 schraubenförmig umgibt und auf diesen mittelbar eine Vorspannkraft in Richtung der Schließstellung des Ventils ausübt, sich am Boden 4 des Ventilstößels 2 abstützen kann.The fixing of the valve tappet 2, which differs from the prior art on the valve stem 1 has the advantage that the valve spring 3, which the valve stem 1 helically surrounds and on this indirectly a biasing force in the direction exercises the closed position of the valve, supported on the bottom 4 of the valve lifter 2 can.

Anders als bei bekannten Ventilanordnungen ist somit nicht die Bereitstellung und axiale Fixierung eines gesonderten Ventilfedertellers erforderlich. Durch die Einsparung der entsprechenden Bauelemente (Ventilfederteller, Ventilkeil) kann das Gewicht der Ventilanordnung um typischerweise ca. 10 g reduziert werden, was in Hinblick auf die verminderte Trägheit des Ventils ein erheblicher Gewinn ist. Ferner ist die beschriebene Konstruktion verhältnismäßig einfach in der Herstellung sowie besonders robust, wobei insbesondere das Kräftegegenspiel von Ventilfeder 3 und Nockenwelle unmittelbar über den Ventilstößel 2 stattfinden kann, ohne hierdurch einen Abschnitt des Ventilschaftes 1 zu belasten.In contrast to known valve arrangements, the provision and Axial fixation of a separate valve spring plate required. By saving the corresponding components (valve spring retainer, valve wedge) can do that Weight of the valve assembly can be reduced by typically about 10 g, which in Considering the reduced inertia of the valve is a significant gain. Further the construction described is relatively simple to manufacture as well as particularly robust, in particular the counterplay of forces of valve spring 3 and camshaft can take place directly via the valve lifter 2 without thereby burdening a portion of the valve stem 1.

Wie in der Figur weiterhin erkennbar ist, weist die Außenseite des Bodens 4 des Ventilstößels 2 eine Vertiefung auf, in welcher eine Einstellscheibe 5 (zum Beispiel durch Klemmsitz) gelagert ist. Die Einstellscheibe 5 deckt die Durchgangsöff nung 6 im Boden 4 des Ventilstößels 2 ab. Ihre Dicke kann je nach dem gewünschten Ventilspiel bei der Montage der Ventilanordnung ausgewählt werden, so daß eine einfache Anpassungsmöglichkeit entsteht. Ferner läßt sich die Einstellscheibe 5 im Bedarfsfalle leicht auswechseln.As can also be seen in the figure, the outside of the bottom 4 of the Valve tappet 2 has a recess in which a shim 5 (for example due to the clamp fit). The shim 5 covers the through hole 6 in the bottom 4 of the valve lifter 2. Their thickness can vary depending on the one you want Valve clearance can be selected when installing the valve assembly, so that a simple adjustment possibility arises. Furthermore, the shim 5 easy to replace if necessary.

Claims (6)

Ventilanordnung für eine Brennkraftmaschine, enthaltend a) ein bewegliches Ventilelement mit einem Ventilschaft (1), b) eine Ventilfeder (3), welche mit dem Ventilelement gekoppelt ist, um auf dieses eine Vorspannungskraft auszuüben, und c) einen im Kraftübertragungsweg zwischen Ventilschaft und einer Ventilauslenkeinrichtung angeordneten Ventilstößel (2), dadurch gekennzeichnet, daß
   der Ventilstößel (2) am Ventilschaft (1) axial fixiert ist, und daß ein Ende der Ventilfeder (3) am Ventilstößel angreift.
Valve arrangement for an internal combustion engine, comprising a) a movable valve element with a valve stem (1), b) a valve spring (3) which is coupled to the valve element in order to exert a prestressing force thereon, and c) a valve tappet (2) arranged in the force transmission path between the valve stem and a valve deflection device, characterized in that
the valve tappet (2) is axially fixed to the valve stem (1), and that one end of the valve spring (3) engages the valve tappet.
Ventilanordnung nach Anspruch 1,
dadurch gekennzeichnet, daß
   der Ventilstößel (2) mit dem Ventilschaft (1) verschweißt ist.
Valve arrangement according to claim 1,
characterized in that
the valve lifter (2) is welded to the valve stem (1).
Ventilanordnung nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß
   der Ventilstößel (2) tassenförmig ausgebildet ist und das Ende des Ventilschaftes (1) übergreift.
Valve arrangement according to claim 1 or 2,
characterized in that
the valve tappet (2) is cup-shaped and overlaps the end of the valve stem (1).
Ventilanordnung nach mindestens einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet, daß
   der Ventilstößel (2) an seiner im montierten Zustand einer Ventilauslenkeinrichtung zugewendeten Seite eine Einstellscheibe (5) zur Einstellung des Ventilspiels aufweist.
Valve arrangement according to at least one of claims 1 to 3,
characterized in that
the valve lifter (2) has an adjusting disc (5) on its side facing a valve deflection device in the assembled state for adjusting the valve clearance.
Ventilanordnung nach mindestens einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet, daß
   der Ventilstößel (5) eine zentrische Öffnung (6) aufweist, in welche ein Ende des Ventilschaftes (1) eingeführt ist.
Valve arrangement according to at least one of claims 1 to 4,
characterized in that
the valve tappet (5) has a central opening (6) into which one end of the valve stem (1) is inserted.
Verfahren zur Herstellung einer Ventilanordnung nach mindestens einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet, daß
   der Ventilstößel (2) durch Laserschweißen mit dem Ventilschaft (1) verbunden wird.
Method for producing a valve arrangement according to at least one of Claims 1 to 5,
characterized in that
the valve tappet (2) is connected to the valve stem (1) by laser welding.
EP02100724A 2002-06-19 2002-06-19 Valve arrangement for an internal combustion engine and manufacturing method Withdrawn EP1375842A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP02100724A EP1375842A1 (en) 2002-06-19 2002-06-19 Valve arrangement for an internal combustion engine and manufacturing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02100724A EP1375842A1 (en) 2002-06-19 2002-06-19 Valve arrangement for an internal combustion engine and manufacturing method

Publications (1)

Publication Number Publication Date
EP1375842A1 true EP1375842A1 (en) 2004-01-02

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1563961A1 (en) * 2004-02-12 2005-08-17 Ford Global Technologies, LLC, A subsidary of Ford Motor Company Device and method for assembling a valve mechanism
DE102004002516A1 (en) * 2004-01-17 2005-08-25 Ford Global Technologies, LLC, Dearborn System of two components used especially in a valve drive of an internal combustion engine comprises a valve disk as a first component and a valve shaft and valve lifter as a second component that are interconnected in the assembled state

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6172810A (en) * 1984-09-18 1986-04-14 Toyota Motor Corp Valve mechanism
US5213072A (en) * 1991-05-28 1993-05-25 Firma Carl Freudenberg Valve actuating mechanism in the cylinder head of a combustion engine
DE4403510A1 (en) * 1994-02-04 1995-08-24 Bruss Dichtungstechnik Valve module for IC engine
US5823158A (en) * 1997-03-04 1998-10-20 Trw Inc. Engine valve and method for making the same
US5884595A (en) * 1995-07-27 1999-03-23 Ina Walzlager Schaeffler Ohg Mechanical cup pushrod for an internal combustion engine's valve gear

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6172810A (en) * 1984-09-18 1986-04-14 Toyota Motor Corp Valve mechanism
US5213072A (en) * 1991-05-28 1993-05-25 Firma Carl Freudenberg Valve actuating mechanism in the cylinder head of a combustion engine
DE4403510A1 (en) * 1994-02-04 1995-08-24 Bruss Dichtungstechnik Valve module for IC engine
US5884595A (en) * 1995-07-27 1999-03-23 Ina Walzlager Schaeffler Ohg Mechanical cup pushrod for an internal combustion engine's valve gear
US5823158A (en) * 1997-03-04 1998-10-20 Trw Inc. Engine valve and method for making the same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 010, no. 242 (M - 509) 21 August 1986 (1986-08-21) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004002516A1 (en) * 2004-01-17 2005-08-25 Ford Global Technologies, LLC, Dearborn System of two components used especially in a valve drive of an internal combustion engine comprises a valve disk as a first component and a valve shaft and valve lifter as a second component that are interconnected in the assembled state
DE102004002516B4 (en) * 2004-01-17 2005-12-01 Ford Global Technologies, LLC, Dearborn Valve system of two components, in particular for use in a valve train of an internal combustion engine, and method for producing such a system
EP1563961A1 (en) * 2004-02-12 2005-08-17 Ford Global Technologies, LLC, A subsidary of Ford Motor Company Device and method for assembling a valve mechanism

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