WO1986005238A1 - Cup tappet for valve drives in combustion engines - Google Patents

Cup tappet for valve drives in combustion engines Download PDF

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Publication number
WO1986005238A1
WO1986005238A1 PCT/DE1986/000077 DE8600077W WO8605238A1 WO 1986005238 A1 WO1986005238 A1 WO 1986005238A1 DE 8600077 W DE8600077 W DE 8600077W WO 8605238 A1 WO8605238 A1 WO 8605238A1
Authority
WO
WIPO (PCT)
Prior art keywords
resins
tappet
cup
base plate
tappet according
Prior art date
Application number
PCT/DE1986/000077
Other languages
German (de)
French (fr)
Inventor
Wilfried Aichele
Peter Baur
Detlef Guhl
Ewald TRÄNKLE
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO1986005238A1 publication Critical patent/WO1986005238A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/0085—Materials for constructing engines or their parts
    • 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
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2253/00—Other material characteristics; Treatment of material
    • F05C2253/16—Fibres

Definitions

  • the invention is based on a tappet with hydraulic adjusting element according to the preamble of the main claim.
  • the valve train of internal combustion engines and thus the cup tappet are usually made of steel. Steel has a high specific weight, so that there is a limit to an increase in the speeds or an increase in the valve opening and closing speeds, particularly with oscillating masses such as are present in the valve train.
  • the tappet according to the invention with the characterizing features of the main claim has the advantage that it has a much lower mass, which allows higher speeds and higher valve opening and closing speeds and thus leads to a higher efficiency of the engine.
  • the reduction in the oscillating mass of a part on the valve train enables the reduction in the oscillating mass of other parts. This leads to the reduction in the mass of the cup shock for the use of softer and thus lighter valve springs.
  • steel has a density of about 8 g / cm 3
  • the densities of the short-fiber-reinforced synthetic resin materials used are between 1.4 and 1.9 g / cm 3 , which means that the oscillating mass on the tappet is 1/3 to 1/2 can be reduced.
  • the cup tappet according to the invention is characterized by lower manufacturing costs in a plastic-appropriate design, since the previously used steel part made of solid material has to be rotated and ground.
  • FIG. 1 shows a section through a first exemplary embodiment, in which the oil supply to the adjusting element is provided by the cam
  • FIG. 2 shows a second exemplary embodiment, in which the oil supply takes place via steel tubes built into the tappet.
  • the cup pusher according to FIG. 1 consists of the molded part 1 produced by injection molding or pressing and made of short fiber-reinforced synthetic resin, for example polybismaleinimide, and contains approximately 50% by weight of glass fibers with a length from 0.5 to 6 mm.
  • the proportions of resin, fibrous and non-fibrous fillers such.
  • B. micro-hollow glass spheres must be adjusted so that the thermal expansion coefficient of the mass corresponds approximately to that of the cylinder head material - generally aluminum. However, this must be determined by appropriate tests.
  • the side walls of the molded part 1 run in corresponding sockets of the cylinder head 2.
  • the molded part 1 Since the material of the molded part 1 does not withstand the forces exerted by the cams 3 and the hydraulic adjusting element part 6, the molded part 1 carries a base plate 4, which is made of steel or a fiber composite material containing 60% by volume long carbon fibers with the orientation 0 ° / 90 °.
  • the base plate 4 can also consist of the combination of these two materials in sandwich form.
  • a steel cup 5 is movably fitted, which, like the piston 6 running in the steel cup, is part of the hydraulic adjusting element.
  • the cup space 7 is separated from the oil storage space 8 by a check valve 9.
  • the base plate 4 Above the oil reservoir 8, the base plate 4 has a bore 10 so that the oil wedge 11 is pressed into the bore 10 by the cam 3 and thus supplies the oil reservoir 8 with oil.
  • the bore 10 can be separated from the oil reservoir 8 by a further check valve 12, but this is not always necessary.
  • Countersunk pockets 13 in the base plate 4 serve to supply oil to the cavity 14 which is present between the molded part 1, the steel cup 5 and the piston 6.
  • the steel cup 5 presses its bottom onto the valve stem 15, which in turn is rigidly connected to the valve, not shown.
  • the base plate 4 is glued to the molded part 1, so that there is an adhesive joint 16 between the two.
  • the function of the bucket tappet with the hydraulic adjusting element is known per se and will not be explained in more detail here, since it is not part of the invention.
  • the embodiment of Figure 2 is largely identical to that of Figure 1, only the oil supply to the hydraulic adjusting element 5, 6 is solved differently.
  • the oil passes through an oil supply bore 17 in the cylinder head and a circumferential lubrication groove 18 through steel tubes 19 into the cavity 14, from there via the recessed pockets 13 in the oil reservoir 8 and from there, finally, as in the exemplary embodiment according to FIG. 1, via the check valve 9 into the cup space 7.
  • the tubes 19 can be glued into the molded part 1 after the corresponding holes have been drilled, but they can also be injected or pressed in with a more complex tool during the manufacture of the tappets.

Abstract

A cup tappet with a hydraulic adjustment component, which can be used in the valve drives of combustion engines. The cup tappet consists basically of a short staple-reinforced duroplastic or thermoplastic synthetic resin mass with a bottom plate on the cam side of higher hardness and tenacity. The oil supply of the hydraulic adjustment component (5, 6) is effected either through the cam by means of a bore hole (10) in the bottom plate (4), or by means of small diameter steel tubes (19) which are glued or pressed into corresponding bore holes in the casting (1). The mass of the cup tappet is considerably less than that of conventional cup tappets made of steel. It therefore permits higher RPM's and shorter valve control times and, as a result, greater motor efficiency.

Description

Tassenstößel für Ventiltriebe von VerbrennungsmotorenBucket tappets for valve drives in internal combustion engines
Stand der TechnikState of the art
Die Erfindung geht aus von einem Tassenstoßel mit hydraulischem Nachstellelement nach der Gattung des Hauptanspruchs. Der Ventiltrieb von Verbrennungsmotoren und damit auch der Tassenstoßel werden üblicherweise aus Stahl hergestellt. Stahl hat ein hohes spezifisches Gewicht, so daß gerade bei oszillierenden Massen, wie sie im Ventiltrieb vorhanden sind, einer Erhöhung der Drehzahlen bzw. einer Steigerung der Ventilöffnungs- und Schließgeschwindigkeiten Grenzen gesetzt sind.The invention is based on a tappet with hydraulic adjusting element according to the preamble of the main claim. The valve train of internal combustion engines and thus the cup tappet are usually made of steel. Steel has a high specific weight, so that there is a limit to an increase in the speeds or an increase in the valve opening and closing speeds, particularly with oscillating masses such as are present in the valve train.
Vorteile der ErfindungAdvantages of the invention
Der erfindungsgemäße Tassenstößel mit den kennzeichnenden Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, daß er eine wesentlich geringere Masse aufweist, was höhere Drehzahlen sowie höhere Ventilöffnungs- bzw. Schließgeschwindigkeiten erlaubt und so zu einem höheren Wirkungsgrad¡ des Motors führt. Darüber hinaus ermöglicht die Reduzierung der oszillierenden Masse eines Teils am Ventiltrieb die Reduzierung der oszillierenden Massen weiterer Teile. So führt die Verringerung der Masse des Tassen stößeis zum Einsatz von weicheren und damit leichteren Ventilfedern. Während Stahl eine Dichte von etwa 8 g/cm3 aufweist, liegen die Dichten der verwendeten kurzfaserverstärkten Kunstharzmassen zwischen 1,4 und 1,9 g/cm3, was bedeutet, daß die oszillierende Masse beim Tassenstößel auf 1/3 bis 1/2 verringert werden kann. Darüber hinaus zeichnet sich der erfindungsgemäße Tassenstoßel bei kunststoffgerechter Gestaltung durch niedrigere Herstellungskosten aus, da das bisher verwendete Stahlteil aus vollem Material gedreht und überschliffen werden muß.The tappet according to the invention with the characterizing features of the main claim has the advantage that it has a much lower mass, which allows higher speeds and higher valve opening and closing speeds and thus leads to a higher efficiency of the engine. In addition, the reduction in the oscillating mass of a part on the valve train enables the reduction in the oscillating mass of other parts. This leads to the reduction in the mass of the cup shock for the use of softer and thus lighter valve springs. While steel has a density of about 8 g / cm 3 , the densities of the short-fiber-reinforced synthetic resin materials used are between 1.4 and 1.9 g / cm 3 , which means that the oscillating mass on the tappet is 1/3 to 1/2 can be reduced. In addition, the cup tappet according to the invention is characterized by lower manufacturing costs in a plastic-appropriate design, since the previously used steel part made of solid material has to be rotated and ground.
Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen des im Hauptanspruch angegebenen Tassenstößels möglich. Besonders vorteilhaft ist es, wenn die Ölversorgung des Nachstellelements durch den Hocken über eine Bohrung in der dem Hocken zugewandten Schicht, gegebenenfalls über ein Rückschlagventil, erfolgt.The measures listed in the subclaims allow advantageous developments and improvements of the tappet specified in the main claim. It is particularly advantageous if the oil supply to the adjusting element is provided by the squat via a bore in the layer facing the squat, optionally via a check valve.
Zeichnungdrawing
Zwei Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Figur 1 zeigt einen Schnitt durch ein erstes Ausführungsbeispiel, bei welchem die Ölversorgung des Nächstellelementes durch den Nocken erfolgt, Figur 2 zeigt ein zweites Ausführungsbeispiel, bei welchem die Ölversorgung über in den Tassenstößel eingebaute Stahlröhrchen erfolgt.Two embodiments of the invention are shown in the drawing and explained in more detail in the following description. FIG. 1 shows a section through a first exemplary embodiment, in which the oil supply to the adjusting element is provided by the cam, FIG. 2 shows a second exemplary embodiment, in which the oil supply takes place via steel tubes built into the tappet.
Beschreibung der AusführungsbeispieleDescription of the embodiments
Der Tassenstoßel gemäß Figur 1 besteht aus dem durch Spritzgießen oder Pressen hergestellten Formteil 1 aus kurzfaserverstärktem Kunstharz, beispielsweise aus Polybismaleinimid, und enthält ca. 50 Gew , -% Glasfasern mit einer Länge von 0,5 bis 6 mm. Die Anteile von Harz, faserförmigen und nichtfaserförmigen Füllstoffen wie z. B. Mikro-Hohlglaskugeln, müssen derart abgestimmt werden, daß der thermische Ausdehnungskoeffizient der Masse etwa dem des Zylinderkopf-Materials - im allgemeinen Aluminium - entspricht. Dies muß jedoch jeweils durch entsprechende Versuche festgelegt werden. Die Seitenwände des Formteils 1 laufen in entsprechenden Fassungen des Zylinderkopfes 2. Da das Material des Formteils 1 den durch den Nocken 3 und das hydraulische Nachstellelementteil 6 ausgeübten Kräften nicht standhält, trägt das Formteil 1 eine Bodenplatte 4 , die aus Stahl oder aus einem Faserverbundwerkstoff besteht, der 60 Vol.-% Kohle-Langfasern mit der Orientierung 0º/90º enthält. Die Bodenplatte 4 kann auch aus der Kombination dieser beiden Materialien in Sandwichform bestehen. In das Formteil 1 ist ein Stahlbecher 5 beweglich eingepaßt, der, ebenso wie der in dem Stahlbecher laufende Kolben 6, Bestandteil des hydraulischen Nachstellelementes ist. Der Becherraum 7 ist von dem Ölvorratsraum 8 durch ein Rückschlagventil 9 getrennt. Über dem Olvorratsraum 8 trägt die Bodenplatte 4 eine Bohrung 10, so daß der Ölkeil 11 durch den Nocken 3 in die Bohrung 10 gedrückt wird und so den Ölvorratsraum 8 mit öl versorgt. Die Bohrung 10 kann von dem Ölvorratsraum 8 durch ein weiteres Rückschlagventil 12 getrennt sein, doch ist dies nicht in jedem Falle erforderlich. Eingesenkte Taschen 13 in der Bodenplatte 4 dienen der Ölversorgung des Hohlraums 14, der zwischen dem Formteil 1, dem Stahlbecher 5 und dem Kolben 6 vorhanden ist. Der Stahlbecher 5 drückt miτ seinem Boden auf den Ventilschaft 15, der seinerseits mit dem nicht dargestellten Ventil in starrer Verbindung ist. Die Bodenplatte 4 ist auf das Formteil 1 aufgeklebt, so daß sich zwischen beiden eine Klebefuge 16 befindet. Die Funktion des Tassenstößels mit dem hydraulischen Nachstellelement ist an sich bekannt und soll hier nicht näher erläutert werden, da sie nicht zur Erfindung gehört. Das Ausführungsbeispiel gemäß Figur 2 ist in weiten Teilen mit dem der Figur 1 identisch, lediglich die Ölversorgung des hydraulischen Nachstellelementes 5, 6 ist anders gelöst. Statt durch die Bohrung 10, wie im Ausführungsbeispiel der Figur 1 , gelangt das Öl über eine Ölversorgungsbohrung 17 im Zylinderkopf und eine in Umfangsrichtung verlaufende Schmiernut 18 durch Stahlröhrchen 19 in den Hohlraum 14, von dort über die eingesenkten Taschen 13 in den Ölvorratsraum 8 und von dort schließlich, wie auch im Ausführungsbeispiel nach Figur 1, über das Rückschlagventil 9 in den Becherraum 7 . Die Röhrchen 19 können nach Anbringen der entsprechenden Bohrungen im Formteil 1 eingeklebt werden, sie können aber auch mit einem aufwendigeren Werkzeug bereits bei der Herstellung der Tassenstößel miteingespritzt bzw. eingepreßt werden.The cup pusher according to FIG. 1 consists of the molded part 1 produced by injection molding or pressing and made of short fiber-reinforced synthetic resin, for example polybismaleinimide, and contains approximately 50% by weight of glass fibers with a length from 0.5 to 6 mm. The proportions of resin, fibrous and non-fibrous fillers such. B. micro-hollow glass spheres must be adjusted so that the thermal expansion coefficient of the mass corresponds approximately to that of the cylinder head material - generally aluminum. However, this must be determined by appropriate tests. The side walls of the molded part 1 run in corresponding sockets of the cylinder head 2. Since the material of the molded part 1 does not withstand the forces exerted by the cams 3 and the hydraulic adjusting element part 6, the molded part 1 carries a base plate 4, which is made of steel or a fiber composite material containing 60% by volume long carbon fibers with the orientation 0 ° / 90 °. The base plate 4 can also consist of the combination of these two materials in sandwich form. In the molded part 1, a steel cup 5 is movably fitted, which, like the piston 6 running in the steel cup, is part of the hydraulic adjusting element. The cup space 7 is separated from the oil storage space 8 by a check valve 9. Above the oil reservoir 8, the base plate 4 has a bore 10 so that the oil wedge 11 is pressed into the bore 10 by the cam 3 and thus supplies the oil reservoir 8 with oil. The bore 10 can be separated from the oil reservoir 8 by a further check valve 12, but this is not always necessary. Countersunk pockets 13 in the base plate 4 serve to supply oil to the cavity 14 which is present between the molded part 1, the steel cup 5 and the piston 6. The steel cup 5 presses its bottom onto the valve stem 15, which in turn is rigidly connected to the valve, not shown. The base plate 4 is glued to the molded part 1, so that there is an adhesive joint 16 between the two. The function of the bucket tappet with the hydraulic adjusting element is known per se and will not be explained in more detail here, since it is not part of the invention. The embodiment of Figure 2 is largely identical to that of Figure 1, only the oil supply to the hydraulic adjusting element 5, 6 is solved differently. Instead of through the bore 10, as in the embodiment of Figure 1, the oil passes through an oil supply bore 17 in the cylinder head and a circumferential lubrication groove 18 through steel tubes 19 into the cavity 14, from there via the recessed pockets 13 in the oil reservoir 8 and from there, finally, as in the exemplary embodiment according to FIG. 1, via the check valve 9 into the cup space 7. The tubes 19 can be glued into the molded part 1 after the corresponding holes have been drilled, but they can also be injected or pressed in with a more complex tool during the manufacture of the tappets.
Durch die Tatsache, daß im Gegensaτz zu den bisherigen Tassenstößeln nicht der gesamte bodenplattennahe Raum des Formteils 1 als Ölvorratsraum dient, sondern lediglich der mit 8 bezeichnete Raum, ist natürlich auch das mitbewegte Ölvolumen und damit auch das Ölgewicht sehr viel geringer, was in die gleiche Richtung geringerer oszillierender Massen wirkt, wie der Ersatz von Stahl durch Kunststoff, wie dies beim Formteil 1 der Fall ist. Due to the fact that, in contrast to the previous tappets, not the entire space near the base plate of the molded part 1 serves as an oil storage space, but only the space labeled 8, the moving oil volume and thus also the oil weight is of course much lower, which in the same The direction of lower oscillating masses acts like the replacement of steel with plastic, as is the case with molded part 1.

Claims

Ansprüche Expectations
1. Tassenstößel mit hydraulischem Nachstellelement für Ventiltriebe von Verbrennungsmotoren, dadurch gekennzeichnet, daß er aus einer kurzfaserverstärkten Kunstharzmasse besteht und auf der dem Nocken zugewandten Fläche eine Bodenplatte ( 4 ) höherer Härte und Zähigkeit aufweist.1. tappet with hydraulic adjustment element for valve drives of internal combustion engines, characterized in that it consists of a short fiber reinforced synthetic resin composition and on the surface facing the cam has a base plate (4) of higher hardness and toughness.
2. Tassenstößel nach Anspruch 1, dadurch gekennzeichnet, daß er aus duroplast ischen Harzen wie Phenolharzen, Polybismaleinimidharzen, Polyimidharzen, Epoxidharzen oder aus thermoplastischen Harzen wie Polysulfonharzen, Polyetherketonharzen, Polyphenylensulfidharzen oder Polyamidimidharzen besteht.2. Cup tappet according to claim 1, characterized in that it consists of thermosetting resins such as phenolic resins, polybismaleinimide resins, polyimide resins, epoxy resins or thermoplastic resins such as polysulfone resins, polyether ketone resins, polyphenylene sulfide resins or polyamideimide resins.
3. Tassenstößel nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Kurzfasern aus Glas, Kohle, Quarz, Aramid, Metallen und/oder Metalloxiden bestehen.3. tappet according to claim 1 or 2, characterized in that the short fibers consist of glass, carbon, quartz, aramid, metals and / or metal oxides.
4 . Tassenstoßel nach Anspruch 3, dadurch gekennzeichnet, daß die verwendeten Fasern eine Länge von 0,5 bis 10 mm, insbesondere von 0,5 bis 6 mm aufweisen.4th Cup pusher according to claim 3, characterized in that the fibers used have a length of 0.5 to 10 mm, in particular 0.5 to 6 mm.
5. Tassenstößel nach einem der Ansprüche 1 bis 4 , dadurch gekennzeichnet, daß die Bodenplatte aus Stahl und/oder aus einem Faserverbundwerkstoff aus einem kohlefaserverstärkten Kunststoff mit Langfasern in 0º/90º-Orientierung besteht.5. tappet according to one of claims 1 to 4, characterized in that the base plate made of steel and / or of a fiber composite material made of a carbon fiber reinforced Plastic with long fibers in 0º / 90º orientation.
6. Tassenstößel nach einem der Ansprüche 1 bis 4 , dadurch gekennzeichnet, daß die Bodenplatte (4) als Sandwichkonstruktion aus dünnen Stahl-Decklagen und einem Kern aus faserverstärktem Kunststoff ausgebildet ist.6. tappet according to one of claims 1 to 4, characterized in that the base plate (4) is designed as a sandwich construction of thin steel cover layers and a core of fiber-reinforced plastic.
7. Tassenstößel nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Bodenplatte (4) zur Ölversorgung des hydraulischen Nachstellelementes (5, 6) eine Bohrung (10) aufweist.7. tappet according to one of claims 1 to 6, characterized in that the base plate (4) for supplying oil to the hydraulic adjusting element (5, 6) has a bore (10).
8. Tassenstößel nach Anspruch 7, dadurch gekennzeichnet, daß die Bohrung (10) durch ein Rückschlagventil (12) verschließbar ist.8. Cup tappet according to claim 7, characterized in that the bore (10) can be closed by a check valve (12).
9. Tassenstoßel nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß er zur Ölversorgung des hydraulischen Nachstellelementes (5, 6) Röhrchen aus Stahl (19) aufweist, die von einer Ringnut (18) am Umfang des Tassenstößels zum hydraulischen Nachstellelement (5, 6) führen. 9. cup tappet according to one of claims 1 to 6, characterized in that it has oil tubes for the hydraulic adjusting element (5, 6) made of steel (19) from an annular groove (18) on the circumference of the tappet to the hydraulic adjusting element (5 , 6) lead.
PCT/DE1986/000077 1985-03-05 1986-02-28 Cup tappet for valve drives in combustion engines WO1986005238A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853507683 DE3507683A1 (en) 1985-03-05 1985-03-05 CUPS FOR VALVE DRIVES OF COMBUSTION ENGINES
DEP3507683.6 1985-03-05

Publications (1)

Publication Number Publication Date
WO1986005238A1 true WO1986005238A1 (en) 1986-09-12

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Application Number Title Priority Date Filing Date
PCT/DE1986/000077 WO1986005238A1 (en) 1985-03-05 1986-02-28 Cup tappet for valve drives in combustion engines

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EP (1) EP0213162A1 (en)
DE (2) DE3507683A1 (en)
WO (1) WO1986005238A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5007388A (en) * 1990-04-23 1991-04-16 Briggs & Stratton Corporation Hydraulic valve lifter
US5081976A (en) * 1989-06-16 1992-01-21 Mercedes-Benz Ag Bucket tappet for an internal combustion engine with overhead camshaft
EP0532294A1 (en) * 1991-09-12 1993-03-17 Eaton Services Limited Directly acting hydraulic tappet body having an outer oil reservoir
EP0555521A1 (en) * 1992-02-11 1993-08-18 Firma Carl Freudenberg Hydraulic valve tappet
US5239953A (en) * 1992-03-03 1993-08-31 Fuji Oozx Inc. Hydraulic tappet for an internal combustion engine

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DE3920729A1 (en) * 1989-06-24 1991-01-10 Gmb Giesserei & Maschinenbau B CUPS FOR BOTTLE VALVES
DE4140244B4 (en) * 1990-12-19 2005-09-22 Volkswagen Ag IC engine charge change valve free play compensator - has several peripheral ducts from compensator to tappet periphery
DE4230227A1 (en) * 1992-09-10 1994-03-17 Porsche Ag Valve train for internal combustion engines
DE9317325U1 (en) * 1993-11-12 1994-01-05 Schaeffler Waelzlager Kg Tappet for a valve train of an internal combustion engine
DE10114073A1 (en) * 2001-03-22 2002-09-26 Ina Schaeffler Kg Valve tappet for IC engines ha base with aperture in outside for lubricant, for permanent lubricant film between control cam and tappet base
DE102007008573A1 (en) 2007-02-19 2008-08-21 Schaeffler Kg Switchable bucket tappets

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Publication number Priority date Publication date Assignee Title
EP0030780A1 (en) * 1979-12-05 1981-06-24 Eaton Corporation Light weight tappet for direct-acting valve gear
DE3017990A1 (en) * 1980-05-10 1981-11-12 Audi Nsu Auto Union Ag, 7107 Neckarsulm Self adjusting tappet for OHC engine - has two parts with interposed spring and check valve between spring chamber and engine oil system
US4430970A (en) * 1982-06-11 1984-02-14 Standard Oil Company (Indiana) Composite tappet
EP0140674A2 (en) * 1983-10-28 1985-05-08 Eaton Corporation Lash adjuster with embedded wear face

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3415228A1 (en) * 1984-04-21 1985-10-31 Audi AG, 8070 Ingolstadt Valve tappet for the valve control of an internal-combustion engine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0030780A1 (en) * 1979-12-05 1981-06-24 Eaton Corporation Light weight tappet for direct-acting valve gear
DE3017990A1 (en) * 1980-05-10 1981-11-12 Audi Nsu Auto Union Ag, 7107 Neckarsulm Self adjusting tappet for OHC engine - has two parts with interposed spring and check valve between spring chamber and engine oil system
US4430970A (en) * 1982-06-11 1984-02-14 Standard Oil Company (Indiana) Composite tappet
EP0140674A2 (en) * 1983-10-28 1985-05-08 Eaton Corporation Lash adjuster with embedded wear face

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5081976A (en) * 1989-06-16 1992-01-21 Mercedes-Benz Ag Bucket tappet for an internal combustion engine with overhead camshaft
US5007388A (en) * 1990-04-23 1991-04-16 Briggs & Stratton Corporation Hydraulic valve lifter
EP0532294A1 (en) * 1991-09-12 1993-03-17 Eaton Services Limited Directly acting hydraulic tappet body having an outer oil reservoir
EP0555521A1 (en) * 1992-02-11 1993-08-18 Firma Carl Freudenberg Hydraulic valve tappet
US5239953A (en) * 1992-03-03 1993-08-31 Fuji Oozx Inc. Hydraulic tappet for an internal combustion engine

Also Published As

Publication number Publication date
EP0213162A1 (en) 1987-03-11
DE8506244U1 (en) 1986-10-09
DE3507683A1 (en) 1986-09-11

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