EP0197246B1 - Valve lash adjusting device - Google Patents

Valve lash adjusting device Download PDF

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Publication number
EP0197246B1
EP0197246B1 EP86100893A EP86100893A EP0197246B1 EP 0197246 B1 EP0197246 B1 EP 0197246B1 EP 86100893 A EP86100893 A EP 86100893A EP 86100893 A EP86100893 A EP 86100893A EP 0197246 B1 EP0197246 B1 EP 0197246B1
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EP
European Patent Office
Prior art keywords
membrane
valve
play compensating
component
valve play
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
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EP86100893A
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German (de)
French (fr)
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EP0197246A2 (en
EP0197246A3 (en
Inventor
Hartmut Dr. Treiber
Hans Deuring
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Goetze GmbH
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Goetze GmbH
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Priority to AT86100893T priority Critical patent/ATE51934T1/en
Publication of EP0197246A2 publication Critical patent/EP0197246A2/en
Publication of EP0197246A3 publication Critical patent/EP0197246A3/en
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Publication of EP0197246B1 publication Critical patent/EP0197246B1/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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/20—Adjusting or compensating clearance
    • F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
    • F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
    • F01L1/245—Hydraulic tappets
    • F01L1/25—Hydraulic tappets between cam and valve stem
    • 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
    • F01L2309/00—Self-contained lash adjusters

Definitions

  • the invention relates to a valve lash adjuster with closed oil filling, for valves of internal combustion engines, with a valve cup arranged on the side of the camshaft, a valve lash compensation element provided within the valve cup and interacting with the valve tappet, and an elastic membrane sealing the area filled with an incompressible medium within the valve cup which extends as a sealing body essentially radially between the inner circumference of a valve cup formed from a cylindrical and a circular component, both of which are positively connected to one another, and the outer circumference of the valve lash compensation element, the membrane being connected to the cylindrical component.
  • DE-OS 25 17 370 discloses a hydraulic lash adjuster, in particular for controlling the engine valves of internal combustion engines.
  • An approximately U-shaped valve cup made of cast material interacts with the camshaft and cooperates radially on the inside with an axially displaceable piston which delimits a pressure chamber enclosed within the valve cup.
  • a number of individual components forming the actual valve lash compensation element are arranged within the pressure chamber.
  • the pressure chamber which is completely filled with a hydraulic medium, is sealed by means of an essentially tubular membrane which extends axially between the valve cup and the piston.
  • valve clearance compensation element consists of several components, which must also be assembled individually. Systems of this type are too expensive for cup tappets under development (closed systems) or cannot be used at all. Since various design approaches are specified for the new systems, the membranes mentioned in the prior art cannot be used as sealing elements. In addition, cast components are relatively heavy and do not necessarily increase the overall weight of the unit, which not least has a negative impact on pricing.
  • US Pat. No. 3,521,608 discloses a valve cup which is formed from a cylindrical and circular-shaped component, both of which are positively connected to one another, the membrane extending essentially radially between the cylindrical component of the valve cup and the valve clearance compensation element.
  • the relatively thin diaphragm cannot conduct the torques occurring in the valve cup to the valve without the diaphragm being destroyed.
  • the fastening of the sealing bead of the membrane to the inner circumference of the cup by means of a clamping ring creates the risk of a membrane tearing.
  • the device consists of a large number of parts that must be assembled individually.
  • the object on which the invention is based is to find a way of sealing cup tappets of this type with closed systems, which makes it possible to compensate for temperature increases and changes in volume of the medium and / or wear.
  • the seal can transmit the torque exerted by the valve cup to the valve.
  • a weight-optimized valve lash adjuster is to be created for reasons of competition.
  • the cylindrical component is provided in the receiving region on the camshaft side with a circumferential, radially inwardly facing collar, while the circular component is provided in the region of its outer peripheral surface with a circumferential bead which extends in the direction of the membrane. which engages behind the collar of the cylindrical component in such a way that the membrane comes into contact with a sealing bead in the area of the bead of the circular component, and that the membrane is provided as a hub-like guide body between the inner circumference of the cylindrical component and the outer circumference of the valve clearance compensation element.
  • the membrane not only performs sealing tasks, but also serves as a guide body for the valve clearance compensation element.
  • the valve lash adjuster is easy to assemble, since an absolutely tight connection is produced by simple snap-in, which moreover does not require additional sealing bodies and is not subject to wear due to its construction.
  • the membrane can be connected to the cylindrical component either by vulcanization or by clamping.
  • the version to be selected should be made dependent on the application.
  • the peripheral region of the membrane receiving the valve clearance compensation element is reinforced by a metal part.
  • the metal part can be essentially cylindrical here and connected to the membrane by vulcanization.
  • the vulcanized metal part preferably has, at the axial end facing the oil chamber, a radially inwardly facing shoulder which, in the installed state, serves as an axial stop for the valve clearance compensation element.
  • the inner peripheral surface of the membrane facing the valve clearance compensation element is provided with a corrugated profile running in the axial direction. The valve lash adjuster can thus be pressed axially into the membrane up to the attachment of the metal part, further radial approaches for lateral guidance of the valve lash adjuster being omitted.
  • the sealing takes place via the rubber deformation between the valve clearance compensation element and the membrane area surrounding it.
  • the same type of sealing is selected in the form-fitting connection area between the cylindrical and the circular-shaped component of the valve cup, i.e. the forces to the guide shirt (cylinder) also acting eccentrically on the base (circular blank) are absorbed essentially by the metallic snap connection.
  • the hydraulic fluid is sealed by deforming the preferably vulcanized circumferential rubber bead through the circumferential bead of the round blank.
  • the proposed solution enables the system to be filled with hydraulic oil under oil without air bubbles, without using a vacuum.
  • valve clearance compensation device 4 arranged in the area of the cylinder head 1 between the camshaft 2 and the valve tappet 3 of a valve of an internal combustion engine (not shown).
  • the valve clearance compensation device 4 consists of a valve cup 5, which is composed of a cylindrical 6 and a circular member 7.
  • a membrane 8 made of elastomeric material and connected to the cylindrical component 6 by vulcanization is arranged, which extends essentially radially inwards and cooperates in the area of its inner peripheral surface 9 with a valve clearance compensation element 10 designed as an installation unit for installation reasons.
  • the free end 11 of the cylindrical component 6 has a radially inwardly extending collar 12.
  • the round-shaped construction member 7 is provided in the region of its outer peripheral surface with a bead 13 which extends axially in the direction of the membrane 8.
  • the radially outer axial shoulder 14 of the circular blank 7 and the collar 12 overlap one another in such a way that the circular blank 7 can be pressed into the cylinder 6 in the manner of a snap connection.
  • the membrane 8 is provided with a circumferential sealing bead 15. After the round 7 has been pressed into the cylinder 6, the former bears sealingly against the sealing bead 15 with axial pretension.
  • the inner circumferential region 9 of the membrane 8 receiving the valve clearance compensation element 10 is stiffened by an adhesive part 16, the inner circumferential surface of the membrane 8 being provided with a corrugated profile 17 running in the axial direction.
  • the adhesive part 16 is provided in the region of the pressure chamber 18 receiving the incompressible medium with a radially inwardly facing extension 19, which serves as an axial stop when the valve clearance compensation element 10 is pressed axially into the membrane 8.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Hydraulic Control Valves For Brake Systems (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

1. Valve play compensating device with enclosed oil filling, for valves of internal combustion engines, with a valve cup arranged on the side of the cam shaft, a valve play compensating element provided within the valve cup and cooperating with the valve tappet, as well as an elastic membrane sealing the region within the valve cup filled with an incompressible medium, which membrane extends as sealing body substantially radially between the inner periphery of a valve cup formed from a cylindrical and a disc-like component, which are both connected together in interlocking manner, and the outer periphery of the valve play compensating element, the membrane (8) being connected to the cylindrical component (6), characterized in that the cylindrical component (6) is provided in the receiving region on the camshaft side with a peripheral collar (12) directed radially inwardly, while the disc-like component (7) is provided in the region of its outer peripheral surface with a circumferential bead (13) extending in the direction of the membrane (8), which engages behind the collar of the cylindrical component (6) so that the membrane (8) abuts the disc-like component (7) in the region of the bead (13) with a sealing rim (15), and in that the membrane (8) is provided as a hub-like guide body between the inner periphery of the cylindrical component (6) and the outer periphery of the valve play compensating element (10).

Description

Die Erfindung betrifft eine Ventilspielausgleichseinrichtung mit abgeschlossener Ölfüllung, für Ventile von Brennkraftmaschinen, mit einer auf der Seite der Nockenwelle angeordneten Ventiltasse, einem innerhalb der Ventiltasse vorgesehenen und mit dem Ventilstößel zusammenwirkenden Ventilspielausgleichselement sowie einer den mit einem inkompressiblen Medium gefüllten Bereich innerhalb der Ventiltasse abdichtenden elastischen Membran, die sich als Dichtkörper im wesentlichen radial zwischen dem Innenumfang einer aus einem zylindrischen und einem rondenförmigen Bauteil gebildeten Ventiltasse, die beide formschlüssig miteinander verbunden sind, und dem Außenumfang des Ventilspielausgleichselementes erstreckt, wobei die Membran mit dem zylindrischen Bauteil verbunden ist.The invention relates to a valve lash adjuster with closed oil filling, for valves of internal combustion engines, with a valve cup arranged on the side of the camshaft, a valve lash compensation element provided within the valve cup and interacting with the valve tappet, and an elastic membrane sealing the area filled with an incompressible medium within the valve cup which extends as a sealing body essentially radially between the inner circumference of a valve cup formed from a cylindrical and a circular component, both of which are positively connected to one another, and the outer circumference of the valve lash compensation element, the membrane being connected to the cylindrical component.

Die DE-OS 25 17 370 offenbart eine hydraulische Spielausgleichseinrichtung, insbesondere für die Steuerung der Motorenventile von Brennkraftmaschinen. Mit der Nockenwelle wirkt eine im Bereich etwa U-förmige Ventiltasse aus gegossenem Material zusammen, die radial innen mit einem axial verschiebbaren Kolben zusammenwirkt, der einen innerhalb der Ventiltasse eingeschlossenen Druckraum begrenzt. Innerhalb des Druckraumes sind mehrere, das eigentliche Ventilspielausgleichselement bildende Einzelbauteile angeordnet. Der vollständig mit einem hydraulischen Medium gefüllte Druckraum wird mittels einer im wesentlichen schlauchförmigen, sich axial zwischen der Ventiltasse und dem Kolben erstreckenden Membran abgedichtet.DE-OS 25 17 370 discloses a hydraulic lash adjuster, in particular for controlling the engine valves of internal combustion engines. An approximately U-shaped valve cup made of cast material interacts with the camshaft and cooperates radially on the inside with an axially displaceable piston which delimits a pressure chamber enclosed within the valve cup. A number of individual components forming the actual valve lash compensation element are arranged within the pressure chamber. The pressure chamber, which is completely filled with a hydraulic medium, is sealed by means of an essentially tubular membrane which extends axially between the valve cup and the piston.

Wie schon angesprochen, besteht das Ventilspielausgleichselement aus mehreren Bauteilen, die ebenfalls einzeln montiert werden müssen. Derartige Systeme sind für in Entwicklung befindliche Tassenstößel (geschlossene Systeme) zu aufwendig beziehungsweise gar nicht einsetzbar. Da bei den neuen Systemen verschiedene konstruktive Ansätze vorgegeben sind, können auch die im Stand der Technik angesprochenen Membranen als Dichtelemente nicht eingesetzt werden. Darüber hinaus sind gegossene Bauteile relativ schwer und erhöhen in nicht notwendiger Weise das Gesamtgewicht der Einheit, was sich nicht zuletzt negativ auf die Preisgestaltung auswirkt.As already mentioned, the valve clearance compensation element consists of several components, which must also be assembled individually. Systems of this type are too expensive for cup tappets under development (closed systems) or cannot be used at all. Since various design approaches are specified for the new systems, the membranes mentioned in the prior art cannot be used as sealing elements. In addition, cast components are relatively heavy and do not necessarily increase the overall weight of the unit, which not least has a negative impact on pricing.

Die US-PS 3.521.608 offenbart eine Ventiltasse, die aus einem zylindrischen und rondenförmigen Bauteil gebildet ist, die beide formschlüssig miteinander verbunden sind, wobei sich die Membran im wesentlichen radial zwischen dem zylindrischen Bauteil der Ventiltasse und dem Ventilspielausgleichselement erstreckt. Bei dieser Konstruktion kann die relativ dünne Membran die in der Ventiltasse auftretenden Drehmomente nicht auf das Ventil leiten, ohne daß die Membran zerstört wird. Darüber hinaus ist durch die Befestigung des Dichtwulstes der Membran am Innenumfang der Tasse mittels eines Klemmringes die Gefahr eines Membranabrisses gegeben. Zudem besteht die Einrichtung aus einer Vielzahl von Teilen, die einzeln montiert werden müssen.US Pat. No. 3,521,608 discloses a valve cup which is formed from a cylindrical and circular-shaped component, both of which are positively connected to one another, the membrane extending essentially radially between the cylindrical component of the valve cup and the valve clearance compensation element. With this construction, the relatively thin diaphragm cannot conduct the torques occurring in the valve cup to the valve without the diaphragm being destroyed. In addition, the fastening of the sealing bead of the membrane to the inner circumference of the cup by means of a clamping ring creates the risk of a membrane tearing. In addition, the device consists of a large number of parts that must be assembled individually.

Demzufolge ist die der Erfindung zugrundeliegende Aufgabe darin zu sehen, eine Möglichkeit zur Abdichtung derartiger Tassenstößel mit geschlossenen Systemen zu finden, die es erlaubt, Temperaturerhöhungen und Volumenänderungen des Mediums und/oder Verschleiß auszugleichen. Gleichzeitig ist damit die Forderung verbunden, daß die Abdichtung das von der Ventiltasse ausgeübte Drehmoment auf das Ventil übertragen kann. Ferner soll aus Gründen des Wettbewerbes eine gewichtsoptimierte Ventilspielausgleichseinrichtung geschaffen werden.Accordingly, the object on which the invention is based is to find a way of sealing cup tappets of this type with closed systems, which makes it possible to compensate for temperature increases and changes in volume of the medium and / or wear. At the same time, there is a requirement that the seal can transmit the torque exerted by the valve cup to the valve. Furthermore, a weight-optimized valve lash adjuster is to be created for reasons of competition.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß das zylindrische Bauteil im nockerrwellenseitigen Aufnahmebereich mit einem umlaufenden, radial nach innen weisenden Kragen versehen ist, während das rondenförmige Bauteil im Bereich seiner äußeren Umfangsfläche mit einer umlaufenden, in Richtung auf die Membran sich erstreckenden Sicke versehen ist, welche den Kragen des zylindrischen Bauteiles derart hintergreift, daß die Membran im Bereich der Sicke des rondenförmigen Bauteiles mit einem Dichtwulst zur Anlage kommt, und daß die Membran als nabenartiger Führungskörper zwischen dem Innenumfang des zylindrischen Bauteiles und dem Außenumfang des Ventilspielausgleichselementes vorgesehen ist.This object is achieved according to the invention in that the cylindrical component is provided in the receiving region on the camshaft side with a circumferential, radially inwardly facing collar, while the circular component is provided in the region of its outer peripheral surface with a circumferential bead which extends in the direction of the membrane. which engages behind the collar of the cylindrical component in such a way that the membrane comes into contact with a sealing bead in the area of the bead of the circular component, and that the membrane is provided as a hub-like guide body between the inner circumference of the cylindrical component and the outer circumference of the valve clearance compensation element.

Auf diese Weise übernimmt die Membran nicht nur Dichtungsaufgaben, sondern sie dient auch als Führungskörper für das Ventilspielausgleichselement. Hinzu kommt, daß die Ventilspielausgleichseinrichtung leicht zusammenzubauen ist, da durch einfaches Einschnappen eine absolut dichte Verbindung erzeugt wird, die überdies ohne zusätzliche Dichtkörper auskommt und aufgrund ihrer Konstruktion keinem Verschleiß unterliegt.In this way, the membrane not only performs sealing tasks, but also serves as a guide body for the valve clearance compensation element. In addition, the valve lash adjuster is easy to assemble, since an absolutely tight connection is produced by simple snap-in, which moreover does not require additional sealing bodies and is not subject to wear due to its construction.

Die Membran kann sowohl durch Vulkanisation oder durch Klemmen mit dem zylindrischen Bauteil verbunden sein. Die zu wählende Ausführung sollte hier vom Anwendungsfall abhängig gemacht werden.The membrane can be connected to the cylindrical component either by vulcanization or by clamping. The version to be selected should be made dependent on the application.

Ferner besteht einem weiteren Gedanken der Erfindung gemäß die Möglichkeit, daß der das Ventilspielausgleichselement aufnehmende Umfangsbereich der Membran durch ein Metallteil verstärkt ist. Das Metallteil kann hier im wesentlichen zylindrisch ausgebildet und durch Vulkanisation mit der Membran verbunden sein. Das einvulkanisierte Metallteil weist vorzugsweise am dem Ölraum zugewandten axialen Ende einen radial nach innen weisenden Ansatz auf, der im Einbauzustand als Axialanschlag für das Ventilspielausgleichselement dient. Die dem Ventilspielausgleichselement zugewandte innere Umfangsfläche der Membran ist mit einem in axialer Richtung verlaufenden Wellprofil versehen. Das Ventilspielausgleichselement ist somit bis zum Ansatz des Metallteiles axial in die Membran einpreßbar, wobei weitere Radialansätze zur seitlichen Führung des Ventilspielausgleichselementes entfallen können.Furthermore, according to a further idea of the invention, there is the possibility that the peripheral region of the membrane receiving the valve clearance compensation element is reinforced by a metal part. The metal part can be essentially cylindrical here and connected to the membrane by vulcanization. The vulcanized metal part preferably has, at the axial end facing the oil chamber, a radially inwardly facing shoulder which, in the installed state, serves as an axial stop for the valve clearance compensation element. The inner peripheral surface of the membrane facing the valve clearance compensation element is provided with a corrugated profile running in the axial direction. The valve lash adjuster can thus be pressed axially into the membrane up to the attachment of the metal part, further radial approaches for lateral guidance of the valve lash adjuster being omitted.

Wie vorab bereits angedeutet, erfolgt die Abdichtung über die Gummiverformung zwischen dem Ventilspielausgleichselement und dem dieses umgebenden Membranbereich. Die gleiche Art der Abdichtung wird im formschlüssigen Verbindungsbereich zwischen dem zylindrischen und dem rondenförmigen Bauteil der Ventiltasse gewählt, das heißt die Aufnahme der auch außermittig auf den Boden (Ronde) angreifenden Kräfte zum Führungshemd (Zylinder) erfolgt im wesentlichen durch die metallische Schnappverbindung. Die Abdichtung zur Hydraulikflüssigkeit erfolgt durch Verformung des vorzugsweise anvulkanisierten umlaufenden Gummiwulstes durch die umlaufende Sicke der Ronde.As already indicated above, the sealing takes place via the rubber deformation between the valve clearance compensation element and the membrane area surrounding it. The same type of sealing is selected in the form-fitting connection area between the cylindrical and the circular-shaped component of the valve cup, i.e. the forces to the guide shirt (cylinder) also acting eccentrically on the base (circular blank) are absorbed essentially by the metallic snap connection. The hydraulic fluid is sealed by deforming the preferably vulcanized circumferential rubber bead through the circumferential bead of the round blank.

Die vorgeschlagene Lösung ermöglicht die luftblasenfreie Befüllung des Systems mit Hydrauliköl unter Öl, ohne Verwendung von Vakuum.The proposed solution enables the system to be filled with hydraulic oil under oil without air bubbles, without using a vacuum.

Die Erfindung ist anhand eines Beispieles in der Zeichnung dargestellt und wird im folgenden näher beschrieben:The invention is illustrated in the drawing using an example and is described in more detail below:

Dargestellt ist eine im Bereich des Zylinderkopfes 1 zwischen der Nockenwelle 2 und dem Ventilstößel 3 eines nicht weiter dargestellten Ventiles einer Brennkraftmaschine angeordnete Ventilspielausgleichseinrichtung 4. Letztere besteht aus einer Ventiltasse 5, die aus einem zylindrischen 6 sowie einem rondenförmigen Bauteil 7 zusammengesetzt ist. Radial innerhalb der Ventiltasse 5 ist eine mit dem zylindrischen Bauteil 6 durch Vulkanisation verbundene, aus Elastomermaterial bestehende Membran 8 angeordnet, die sich im wesentlichen radial nach innen erstreckt und im Bereich ihrer inneren Umfangsfläche 9 mit einem aus Montagegründen als Einbaueinheit ausgebildeten Ventilspielausgleichselement 10 zusammenwirkt. Im Bereich der Nockenwelle 2 weist das freie Ende 11 des zylindrischen Bauteiles 6 einen radial nach innen verlaufenden Kragen 12 auf. Analog dazu ist das rondenförmige Bautail 7 im Bereich seiner äußeren Umfangsfläche mit einer axial in Richtung auf die Membran 8 sich erstreckenden Sicke 13 versehen. Der radial außenliegende Axialansatz 14 der Ronde 7 und der Kragen 12 überdecken einander in der Weise, daß die Ronde 7 nach Art einer Schnappverbindung in den Zylinder 6 eingepreßt werden kann. Um statisch im Bereich der Sicke 3 abdichten zu können, ist die Membran 8 mit einem umlaufenden Dichtwulst 15 versehen. Nach dem Einpressen der Ronde 7 in den Zylinder 6 liegt ersterer mit axialer Vorspannung am Dichtwulst 15 dichtend an. Der das Ventilspielausgleichselement 10 aufnehmende innere Umfangsbereich 9 der Membran 8 ist durch ein Haftteil 16 versteift, wobei die innere Umfangsfläche der Membran 8 mit einem in axialer Richtung verlaufenden Wellprofil 17 versehen ist. Das Haftteil 16 ist im Bereich des das inkompressible Medium aufnehmenden Druckraumes 18 mit einem radial nach innen weisenden Ansatz 19 versehen, der beim axialen Einpressen des Ventilspielausgleichselementes 10 in die Membran 8 als Axialanschlag dient.Shown is a valve clearance compensation device 4 arranged in the area of the cylinder head 1 between the camshaft 2 and the valve tappet 3 of a valve of an internal combustion engine (not shown). The valve clearance compensation device 4 consists of a valve cup 5, which is composed of a cylindrical 6 and a circular member 7. Radially inside the valve cup 5, a membrane 8 made of elastomeric material and connected to the cylindrical component 6 by vulcanization is arranged, which extends essentially radially inwards and cooperates in the area of its inner peripheral surface 9 with a valve clearance compensation element 10 designed as an installation unit for installation reasons. In the area of the camshaft 2, the free end 11 of the cylindrical component 6 has a radially inwardly extending collar 12. Analogously to this, the round-shaped construction member 7 is provided in the region of its outer peripheral surface with a bead 13 which extends axially in the direction of the membrane 8. The radially outer axial shoulder 14 of the circular blank 7 and the collar 12 overlap one another in such a way that the circular blank 7 can be pressed into the cylinder 6 in the manner of a snap connection. In order to be able to seal statically in the area of the bead 3, the membrane 8 is provided with a circumferential sealing bead 15. After the round 7 has been pressed into the cylinder 6, the former bears sealingly against the sealing bead 15 with axial pretension. The inner circumferential region 9 of the membrane 8 receiving the valve clearance compensation element 10 is stiffened by an adhesive part 16, the inner circumferential surface of the membrane 8 being provided with a corrugated profile 17 running in the axial direction. The adhesive part 16 is provided in the region of the pressure chamber 18 receiving the incompressible medium with a radially inwardly facing extension 19, which serves as an axial stop when the valve clearance compensation element 10 is pressed axially into the membrane 8.

Claims (8)

1. Valve play compensating device with enclosed oil filling, for valves of internal combustion engines, with a valve cup arranged on the side of the cam shaft, a valve play compensating element provided within the valve cup and cooperating with the valve tappet, as well as an elastic membrane sealing the region within the valve cup filled with an incompressible medium, which membrane extends as sealing body substantially radially between the inner periphery of a valve cup formed from a cylindrical and a disc-like component, which are both connected together in interlocking manner, and the outer periphery of the valve play compensating element, the membrane (8) being connected to the cylindrical component (6), characterized in that the cylindrical component (6) is provided in the receiving region on the camshaft side with a peripheral collar (12) directed radially inwardly, while the disc-like component (7) is provided in the region of its outer peripheral surface with a circumferential bead (13) extending in the direction of the membrane (8), which engages behind the collar of the cylindrical component (6) so that the membrane (8) abuts the disc-like component (7) in the region of the bead (13) with a sealing rim (15), and in that the membrane (8) is provided as a hub-like guide body between the inner periphery of the cylindrical component (6) and the outer periphery of the valve play compensating element (10).
2. Valve play compensating device according to claim 1, characterized in that the membrane (8) is bonded to the cylindrical component (6) by vulcanising.
3. Valve play compensating device according to claims 1 and 2, characterized in that the membrane (8) is fixed to the cylindrical component by compression.
4. Valve play compensating device according to claims 1 to 3, characterized in that the inner peripheral region (9) of the membrane receiving the valve play compensating element (10) is reinforced by a metal part (16).
5. Valve play compensating device according to claims 1 to 4, characterized in that the metal part (16) is formed substantially cylindrically and is bonded to the membrane (8) by vulcanisation.
6. Valve play compensating device according to claims 1 to 5, characterized in that the metal part (16) has a projection (19) directed radially inwardly at the end facing the oil chamber (18).
7. Valve play compensating device according to claims 1 to 6, characterized in that the peripheral surface (9) of the membrane (8) facing the valve play compensating element (10) is provided with a wavy surface (17) running in the axial direction.
8. Valve play compensating device according to claims 1 to 7, characterized in that the valve play compensating element (10) can be pressed axially into the membrane (8) up to the projection (19) of the metal part (16).
EP86100893A 1985-04-12 1986-01-23 Valve lash adjusting device Expired - Lifetime EP0197246B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86100893T ATE51934T1 (en) 1985-04-12 1986-01-23 VALVE CLEARANCE ADJUSTMENT DEVICE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3513162 1985-04-12
DE19853513162 DE3513162A1 (en) 1985-04-12 1985-04-12 VALVE GAME COMPENSATION DEVICE

Publications (3)

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EP0197246A2 EP0197246A2 (en) 1986-10-15
EP0197246A3 EP0197246A3 (en) 1987-05-06
EP0197246B1 true EP0197246B1 (en) 1990-04-11

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EP86100893A Expired - Lifetime EP0197246B1 (en) 1985-04-12 1986-01-23 Valve lash adjusting device

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EP (1) EP0197246B1 (en)
JP (1) JPS61237808A (en)
AT (1) ATE51934T1 (en)
DE (1) DE3513162A1 (en)
ES (1) ES296687Y (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3606824A1 (en) * 1986-02-13 1987-08-20 Goetze Ag VALVE GAME COMPENSATION DEVICE
DE3639911A1 (en) * 1986-11-22 1988-06-01 Schaeffler Waelzlager Kg AUTOMATICALLY HYDRAULICALLY ADJUSTING VALVE
DE4026793A1 (en) * 1990-08-24 1992-03-05 Freudenberg Carl Fa HYDRAULIC VALVE COMPENSATION COMPENSATION ELEMENT FOR INTERNAL COMBUSTION ENGINES

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3495577A (en) * 1968-02-07 1970-02-17 Clifford H Collins Self-contained hydraulic tappet
US3521608A (en) * 1968-10-16 1970-07-28 Gen Motors Corp Self-contained hydraulic valve lifter
GB2093940A (en) * 1981-03-02 1982-09-08 Stanadyne Inc Hydraulic lash adjuster

Family Cites Families (4)

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GB562101A (en) * 1942-12-14 1944-06-19 Arthur Burton Buckley Improvements in or relating to adjustable distance-pieces, tappets, valve-lifters and like adjustable devices
DE1914693B2 (en) * 1969-03-22 1978-02-16 Motomak Motorenbau Maschinen- U. Werkzeugfabrik, Konstruktionen Gmbh, 8070 Ingolstadt Hydraulically adjusted valve tappet for OHC IC engines - with oil reservoir fed from main lubricating system enclosing compensating unit
DE3421420A1 (en) * 1983-08-16 1985-03-07 IRM-Antriebstechnik GmbH, 7057 Winnenden Oil feed with return prevention device for bucket tappets with hydraulic valve clearance adjustment
IT8467294A0 (en) * 1984-03-27 1984-03-27 Riv Officine Di Villar Perosa HYDRAULIC TAPPET TO CONTROL THE MOTION OF A VALVE OF AN ENDothermic Engine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3495577A (en) * 1968-02-07 1970-02-17 Clifford H Collins Self-contained hydraulic tappet
US3521608A (en) * 1968-10-16 1970-07-28 Gen Motors Corp Self-contained hydraulic valve lifter
GB2093940A (en) * 1981-03-02 1982-09-08 Stanadyne Inc Hydraulic lash adjuster

Also Published As

Publication number Publication date
EP0197246A2 (en) 1986-10-15
EP0197246A3 (en) 1987-05-06
ES296687U (en) 1987-12-01
DE3513162C2 (en) 1989-05-11
ES296687Y (en) 1988-05-16
JPS61237808A (en) 1986-10-23
DE3513162A1 (en) 1986-10-16
ATE51934T1 (en) 1990-04-15

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