WO1997021908A1 - Device for varying the valve timing of an internal combustion engine - Google Patents

Device for varying the valve timing of an internal combustion engine Download PDF

Info

Publication number
WO1997021908A1
WO1997021908A1 PCT/EP1996/003365 EP9603365W WO9721908A1 WO 1997021908 A1 WO1997021908 A1 WO 1997021908A1 EP 9603365 W EP9603365 W EP 9603365W WO 9721908 A1 WO9721908 A1 WO 9721908A1
Authority
WO
WIPO (PCT)
Prior art keywords
camshaft
drive
combustion engine
internal combustion
plastic
Prior art date
Application number
PCT/EP1996/003365
Other languages
German (de)
French (fr)
Inventor
Doris Greiner
Dieter Goppelt
Original Assignee
INA Wälzlager Schaeffler oHG
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 INA Wälzlager Schaeffler oHG filed Critical INA Wälzlager Schaeffler oHG
Publication of WO1997021908A1 publication Critical patent/WO1997021908A1/en

Links

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
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/34403—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using helically teethed sleeve or gear moving axially between crankshaft and camshaft
    • F01L1/34406—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using helically teethed sleeve or gear moving axially between crankshaft and camshaft the helically teethed sleeve being located in the camshaft driving pulley
    • 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
    • F01L2301/00—Using particular materials

Definitions

  • the invention relates to a device for changing the timing of an internal combustion engine, which is arranged within a control drive of at least one camshaft, preferably between the latter and a drive wheel that is in drive connection with the camshaft, consisting of a sleeve-like adjusting element which can be displaced axially by hydraulic means and which has two toothed sections, the first section cooperating with a toothing of a drive element connected to the drive wheel and the second section interacting with a drive element connected to the camshaft.
  • the invention is therefore based on the object of providing an adjusting element for a device for changing the timing of an internal combustion engine, in which the disadvantages indicated are eliminated.
  • the sleeve-like adjusting element is made of a polymer plastic.
  • plastics are to be understood in a known manner as macromolecular, essentially or partially organic materials, the properties of which are primarily based on their structural structure and the degree of crosslinking, and only secondarily on their chemical composition are based.
  • Such plastics can be converted into an arbitrarily shaped object, even with a very complicated geometry, by economical manufacturing processes, such as injection molding in a single manufacturing step. Its manufacturing costs are only around 20 to 30% compared to conventional steel manufacturing.
  • a further advantage in this context is the low density of plastics, which at values of about 0.9 to 2.3 g / cm 3 is significantly lower than that of steel and thus contributes significantly to weight reduction.
  • Another additional advantage over steel is the dampening effect of plastic.
  • the damping is based on the conversion of periodically supplied energy into another form of energy.
  • the ability of the plastics is used to convert part of the mechanical vibration energy into heat when subjected to alternating stresses and thus to contribute to the smoother running of the adjusting device.
  • Another advantage of plastics is their lower modulus of elasticity compared to metals. This makes it possible to compensate for fluctuations in tolerance due to production, and for the necessary toothing of the adjusting piston not to require the narrow tolerances required by metal teeth.
  • the plastic is a thermoset or a thermoplastic.
  • Thermosets are the generic term for a group of generally hard, amorphous and rigid up to the decomposition temperature, which are made up of spatially close-meshed macromolecules and therefore have high mechanical strength. At low temperatures, they are steel-elastic materials that do not flow viscously even at high temperatures, but behave elastically with very limited deformability.
  • Thermoplastic plastics are synthetic high-molecular substances, the individual molecular chains of which are not linked to one another by chemical bonds. Their typical characteristic is that they soften when the temperature rises after their softening point is exceeded and harden again when they cool down.
  • the plastic should be reinforced with glass fibers.
  • the plastics are equipped with short glass fibers of less than 1 mm or with glass fibers up to about 3 mm long.
  • Thermoplastics reinforced in this way are increasingly used in the technical sector. For example, they can be processed using the injection molding process, have higher rigidity and higher softening temperatures than starting thermoplastics.
  • the plastic should be a polyurethane.
  • Polyurethane is particularly suitable since it is temperature-resistant up to 180 ° C, very aging-resistant and stable against oil.
  • the single figure shows a camshaft adjuster in longitudinal section with an adjusting element according to the invention.
  • the single figure shows a device 1 for changing the timing of an internal combustion engine.
  • This device 1 is arranged within a control drive for a camshaft (not shown) and a drive wheel 2 which is in drive connection with the camshaft.
  • an axially displaceable and one-piece adjusting element 3 arranged concentrically to the camshaft axis X has two oppositely arranged, helically toothed sections 5, 6 on its inner circumferential surface.
  • the first section 5 of the adjusting element 3 interacts with a drive element 7 designed as a sleeve.
  • This drive element 7 is rotatably arranged on a hub 8 of an output element 9.
  • the drive element 7 is connected to a flange 10.
  • the drive wheel 2 is screwed to this flange 10.
  • a control belt acts on this drive wheel 2.
  • the second helically toothed section 6 of the adjusting element 3 is arranged in a complementary external toothing 11 of the output element 9.
  • the Abtriebs ⁇ element 9 is, as stated above, rotatably connected to a camshaft, not shown.
  • a piston plate 13 extends from an outer circumferential surface 1 2 of the adjusting element 3 perpendicular to the camshaft axis X and is integrally connected to the adjusting element 3 18, 19 limited for hydraulic means. In the axial direction, the piston plate 13 is acted upon by a concentric compression spring 20. This is supported on the one hand on the end face 14 of the piston plate 13 on the camshaft side and on the other hand on the flange 10.
  • During the first pressure chamber 18 is a pressure medium 0
  • introduction 21 is supplied with hydraulic medium, this takes place in the second pressure chamber 19 by further pressure medium introduction 22.
  • the adjusting piston 3 of the device according to the invention for changing the timing of an internal combustion engine was made of polyurethane in the present case.
  • the advantages listed in the patent description result.
  • the desired relative setting of the camshaft in relation to the drive wheel 2 is achieved by a hydraulic adjustment of the adjusting piston 3.
  • hydraulic pressure is applied to the end face 15 of the piston plate 13 via the pressure medium line 21, which can run in the output element 9 and extends along the front side of the output element 18 into the first pressure chamber 18 (initial state see lower half of the figure) ).

Abstract

The object of the invention is to render a device (1) for varying the valve timing of an internal combustion engine more lightweight and produce it more simply. According to the invention, this object is achieved in that an adjusting element (3), which is acted upon hydraulically and is connected to a drive wheel (2) and a camshaft, is made from plastics.

Description

Beschreibung description
Titel der ErfindungTitle of the invention
Vorrichtung zum Verändern der Steuerzeiten einer BrennkraftmaschineDevice for changing the timing of an internal combustion engine
Anwendungsgebiet der ErfindungField of application of the invention
Die Erfindung betrifft eine Vorrichtung zum Verändern der Steuerzeiten einer Brennkraftmaschine, die innerhalb eines Steuertiebs von zumindest einer Nok- kenwelle, vorzugsweise zwischen dieser und einem mit der Nockenwelle in Antriebsverbindung stehenden Antriebsrad angeordnet ist, bestehend aus einem über hydraulische Mittel axial verschiebbaren hülsenartigen Verstellelement, welches zwei verzahnte Abschnitte aufweist, wobei der erste Abschnitt mit einer Verzahnung eines mit dem Antriebsrad verbundenen Antriebselements und der zweite Abschnitt mit einem mit der Nockenwelle verbundenen An¬ triebselement zusammenwirkt.The invention relates to a device for changing the timing of an internal combustion engine, which is arranged within a control drive of at least one camshaft, preferably between the latter and a drive wheel that is in drive connection with the camshaft, consisting of a sleeve-like adjusting element which can be displaced axially by hydraulic means and which has two toothed sections, the first section cooperating with a toothing of a drive element connected to the drive wheel and the second section interacting with a drive element connected to the camshaft.
Hintergrund der ErfindungBackground of the Invention
Eine derartige Vorrichtung ist beispielsweise aus der EP 0 335 083 B1 vor¬ bekannt. Von Nachteil dabei ist, daß dieses hülsenartige Verstellelement, auch Verstellkolben genannt, aus einer Stahl legierung gefertigt ist. Ein solch stählerner Verstellkolben ist aufgrund seiner erforderlichen Verzahnung nur aufwendig her- stellbar, hat ein hohes Gewicht und zeigt bei Betreiben eine gewisse Geräusch¬ entwicklung. Zusammenfassung der ErfindungSuch a device is previously known for example from EP 0 335 083 B1. The disadvantage here is that this sleeve-like adjusting element, also called adjusting piston, is made of a steel alloy. Such a steel adjusting piston is difficult to manufacture due to its required toothing, has a high weight and shows a certain amount of noise when operated. Summary of the invention
Der Erfindung liegt daher die Aufgabe zugrunde, ein Verstellelement für eine Vorrichtung zum Verändern der Steuerzeiten einer Brennkraftmaschine zu schaffen, bei dem die aufgezeigten Nachteile beseitigt sind.The invention is therefore based on the object of providing an adjusting element for a device for changing the timing of an internal combustion engine, in which the disadvantages indicated are eliminated.
Erfindungsgemäß wird diese Aufgabe nach dem kennzeichnenden Teil des Hauptanspruches dadurch gelöst, daß das hülsenartige Verstellelement aus einem polymeren Kunststoff hergestellt ist.According to the invention this object is achieved according to the characterizing part of the main claim in that the sleeve-like adjusting element is made of a polymer plastic.
Unter Kunststoffen sind dabei in bekannter Weise makromolekulare, ganz oder teilweise durch Synthese entstandene und im wesentlichen organische Materia¬ lien zu verstehen, deren Eigenschaften in erster Linie auf ihrem strukturellen Aufbau und dem Grad der Vernetzung und erst in zweiter Linie auf der chemi- sehen Zusammensetzung beruhen.In this case, plastics are to be understood in a known manner as macromolecular, essentially or partially organic materials, the properties of which are primarily based on their structural structure and the degree of crosslinking, and only secondarily on their chemical composition are based.
Derartige Kunststoffe lassen sich durch wirtschaftliche Fertigungsverfahren, wie beispielsweise das Spritzgießen in einem einzigen Fertigungsschritt in einen beliebig geformten Gegenstand, auch mit sehr komplizierter Geometrie, um- wandeln. Dessen Herstellungskosten liegen gegenüber einer konventionellen Herstellung aus Stahl nur bei etwa 20 bis 30 %.Such plastics can be converted into an arbitrarily shaped object, even with a very complicated geometry, by economical manufacturing processes, such as injection molding in a single manufacturing step. Its manufacturing costs are only around 20 to 30% compared to conventional steel manufacturing.
Ein weiterer Vorteil in diesem Zusammenhang ist die geringe Dichte von Kunststoffen, die mit Werten von etwa 0,9 bis 2,3 g/cm3 wesentlich unter der von Stahl liegt und somit erheblich zur Gewichtsreduzierung beiträgt.A further advantage in this context is the low density of plastics, which at values of about 0.9 to 2.3 g / cm 3 is significantly lower than that of steel and thus contributes significantly to weight reduction.
Ein zusätzlich weiterer Vorteil gegenüber Stahl ist die dämpfende Wirkung von Kunststoff. Die Dämpfung beruht auf Umwandlung periodisch zugeführter Energie in eine andere Energieform. Hierbei wird die Fähigkeit der Kunststoffe ausgenutzt, bei Wechselbeanspruchung einen Teil der mechanischen Schwin¬ gungsenergie in Wärme umzusetzen und so zum ruhigeren Lauf der Versteil¬ einrichtung beizutragen. Ein anderer Vorteil von Kunststoffen ist deren niedrigerer Elastizitätsmodul gegenüber Metallen. Dadurch wird es möglich, daß herstellungsbedingte Tole¬ ranzschwankungen besser kompensiert werden können und bei der erforderli¬ chen Verzahnung des Verstellkolbens nicht so enge Toleranzen erforderlich sind, wie sie Metallverzahnungen erfordern.Another additional advantage over steel is the dampening effect of plastic. The damping is based on the conversion of periodically supplied energy into another form of energy. Here, the ability of the plastics is used to convert part of the mechanical vibration energy into heat when subjected to alternating stresses and thus to contribute to the smoother running of the adjusting device. Another advantage of plastics is their lower modulus of elasticity compared to metals. This makes it possible to compensate for fluctuations in tolerance due to production, and for the necessary toothing of the adjusting piston not to require the narrow tolerances required by metal teeth.
Nach den Ansprüchen 2 und 3 ist vorgesehen, daß der Kunststoff ein Duroplast bzw. ein Thermoplast ist. Duroplaste sind der Oberbegriff für eine Gruppe von in der Regel harten, amorphen und bis zur Zersetzungstemperatur starren Kunststoffen, die aus räumlich engmaschig vernetzten Makromolekülen aufge¬ baut sind und deshalb hohe mechanische Festigkeit aufweisen. Sie stellen bei niederen Temperaturen stahlelastische Stoffe dar, die auch bei hohen Tempera¬ turen nicht viskos fließen, sondern sich bei sehr begrenzter Deformierbarkeit elastisch verhalten. Thermoplastische Kunststoffe sind synthetische hochmoleku- lare Stoffe, deren einzlene Molekülketten nicht durch chemische Bindungen miteinander verknüpft sind. Ihr typisches Kennzeichen besteht darin, daß sie bei Erhöhung der Temperatur nach Überschreiten ihres Erweichungspunktes weich werden und bei Abkühlung wieder erhärten.According to claims 2 and 3 it is provided that the plastic is a thermoset or a thermoplastic. Thermosets are the generic term for a group of generally hard, amorphous and rigid up to the decomposition temperature, which are made up of spatially close-meshed macromolecules and therefore have high mechanical strength. At low temperatures, they are steel-elastic materials that do not flow viscously even at high temperatures, but behave elastically with very limited deformability. Thermoplastic plastics are synthetic high-molecular substances, the individual molecular chains of which are not linked to one another by chemical bonds. Their typical characteristic is that they soften when the temperature rises after their softening point is exceeded and harden again when they cool down.
Aus Anspruch 4 geht hervor, daß der Kunststoff mit Glasfasern verstärkt sein soll. Dabei werden die Kunststoffe mit Glaskurzfasern von weniger als 1 mm oder mit Glasfasern bis zu etwa 3mm Länge ausgerüstet. Derartig verstärkte Thermoplaste werden zunehmend im technischen Sektor verwendet. Sie können beispielsweise im Spritzgießverfahren verarbeitet werden, haben eine höhere Steifheit und höhere Erweichungstemperaturen als Ausgangsthermoplaste.It is apparent from claim 4 that the plastic should be reinforced with glass fibers. The plastics are equipped with short glass fibers of less than 1 mm or with glass fibers up to about 3 mm long. Thermoplastics reinforced in this way are increasingly used in the technical sector. For example, they can be processed using the injection molding process, have higher rigidity and higher softening temperatures than starting thermoplastics.
Schließlich soll nach Anspruch 5 der Kunststoff ein Polyurethan sein. Polyure¬ than eignet sich besonders, da es bis 180° C temperaturbeständig, sehr alte¬ rungsbeständig und stabil gegen Öl ist.Finally, according to claim 5, the plastic should be a polyurethane. Polyurethane is particularly suitable since it is temperature-resistant up to 180 ° C, very aging-resistant and stable against oil.
Die Erfindung wird an nachstehendem Ausführungsbeispiel näher erläutert. uThe invention is explained in more detail using the following exemplary embodiment. u
Kurze Beschreibung der ZeichnungBrief description of the drawing
Die einzige Figur zeigt einen Nockenwellenversteller im Längsschnitt mit erfindungsgemäßem Verstellelement.The single figure shows a camshaft adjuster in longitudinal section with an adjusting element according to the invention.
Ausführliche Beschreibung der ZeichnungDetailed description of the drawing
Die einzige Figur zeigt eine Vorrichtung 1 zum Verändern der Steuerzeiten einer Brennkraftmaschine. Diese Vorrichtung 1 ist innerhalb eines Steuertriebs für eine nicht dargestellte Nockenwelle und ein mit der Nockenwelle in An¬ triebsverbindung stehendes Antriebsrad 2 angeordnet. Ein konzentrisch zur Nockenwellenachse X angeordnetes, axial verschiebbares und einteiliges Ver¬ stellelement 3 weist hierzu an seiner inneren Mantelfläche zwei gegenläufig angeordnete, schräg verzahnte Abschnitte 5, 6 auf. Der erste Abschnitt 5 des Verstellerelements 3 wirkt mit einem als Hülse ausgebildeten Antriebselement 7 zusammen. Dieses Antriebselement 7 ist drehbar auf einer Nabe 8 eines Abtriebselements 9 angeordnet. Das Antriebselement 7 ist mit einem Flansch 10 verbunden. Mit diesem Flansch 10 ist das Antriebsrad 2 verschraubt. Auf dieses Antriebsrad 2 wirkt ein ebenfalls nicht dargestellter Steuerriemen. Der zweite schräg verzahnte Abschnitt 6 des Verstellelements 3 ist in einer komplementä¬ ren Außenverzahnung 1 1 des Abtriebselements 9 angeordnet. Das Abtriebs¬ element 9 ist wie oben ausgeführt, mit einer nicht dargestellten Nockenwelle drehfest verbunden.The single figure shows a device 1 for changing the timing of an internal combustion engine. This device 1 is arranged within a control drive for a camshaft (not shown) and a drive wheel 2 which is in drive connection with the camshaft. For this purpose, an axially displaceable and one-piece adjusting element 3 arranged concentrically to the camshaft axis X has two oppositely arranged, helically toothed sections 5, 6 on its inner circumferential surface. The first section 5 of the adjusting element 3 interacts with a drive element 7 designed as a sleeve. This drive element 7 is rotatably arranged on a hub 8 of an output element 9. The drive element 7 is connected to a flange 10. The drive wheel 2 is screwed to this flange 10. A control belt, also not shown, acts on this drive wheel 2. The second helically toothed section 6 of the adjusting element 3 is arranged in a complementary external toothing 11 of the output element 9. The Abtriebs¬ element 9 is, as stated above, rotatably connected to a camshaft, not shown.
Von einer Außenmantelfläche 1 2 des Verstellelementes 3 erstreckt sich senk¬ recht zur Nocken wellenachse X eine einteilig mit dem Verstellelement 3 ver¬ bundene Kolbenplatte 13. Durch Stirnflächen 14, 1 5 der Kolbenplatte 13 und durch die Innenfläche 1 6 des Blechzylinders 1 7 sind Druckräume 18, 19 für hydraulische Mittel begrenzt. In Axialrichtung ist die Kolbenplatte 13 durch eine konzentrische Druckfeder 20 beaufschlagt. Dieses stützt sich einerseits an der nokenwellenseitigen Stirnfläche 14 der Kolbenplatte 13 und andererseits am Flansch 10 ab. Während der erste Druckraum 18 wird durch eine Druckmittel- 0A piston plate 13 extends from an outer circumferential surface 1 2 of the adjusting element 3 perpendicular to the camshaft axis X and is integrally connected to the adjusting element 3 18, 19 limited for hydraulic means. In the axial direction, the piston plate 13 is acted upon by a concentric compression spring 20. This is supported on the one hand on the end face 14 of the piston plate 13 on the camshaft side and on the other hand on the flange 10. During the first pressure chamber 18 is a pressure medium 0
einleitung 21 mit hydraulischem Mittel versorgt wird, erfolgt dies beim zweiten Druckraum 19 durch weitere Druckmitteleinleitung 22.introduction 21 is supplied with hydraulic medium, this takes place in the second pressure chamber 19 by further pressure medium introduction 22.
Der Verstellkolben 3 der erfindungsgemäßen Vorrichtung zum Verändern der Steuerzeiten einer Brennkraftmaschine wurde im vorliegenden Fall aus Polyure¬ than gefertigt. Bei Betreiben der Versteilvorrichtung ergeben sich die in der Patentbeschreibung aufgeführten Vorteile.The adjusting piston 3 of the device according to the invention for changing the timing of an internal combustion engine was made of polyurethane in the present case. When operating the adjusting device, the advantages listed in the patent description result.
In bekannter Weise wird die gewünschte Relatiwerstellung der Nockenwelle in bezug auf das Antriebsrad 2 durch eine hydraulische Verstellung des Verstell¬ kolbens 3 realisiert. Hierzu wird über die Druckmittel leitung 21 , die im Ab¬ triebselement 9 verlaufen kann und sich entlang der Stirnseite des Abtriebs¬ elementes in den ersten Druckraum 18 erstreckt, die Stirnfläche 1 5 der Kolben¬ platte 13 mit hydraulischen Druck beaufschlagt (Ausgangszustand siehe untere Bildhälfte). Durch die mit verschiedenen Schrägungswinkeln verzahnten Ab¬ schnitte 5, 6, die mit komplementären Außenverzahnungen 23, 1 1 des Antriebs¬ elementes 7 und des Abtriebselementes 9 in Eingriff stehen, wird bei einer axialen Verschiebung des Verstellkolbens 3 zugleich eine Verdrehung des Antriebs- zu dem Abtriebselement 7, 9 erzielt. Da beide Elemente 7, 9 mit den entsprechenden Steuertriebskomponenten wie Antriebsrad 2 und nicht darge¬ stellter Nockenwelle verbunden sind, ist eine Phasenverschiebung, beispiels¬ weise in Richtung frühes Öffnen und frühes Schließen der Ventile, gegeben. In a known manner, the desired relative setting of the camshaft in relation to the drive wheel 2 is achieved by a hydraulic adjustment of the adjusting piston 3. For this purpose, hydraulic pressure is applied to the end face 15 of the piston plate 13 via the pressure medium line 21, which can run in the output element 9 and extends along the front side of the output element 18 into the first pressure chamber 18 (initial state see lower half of the figure) ). The sections 5, 6, which are toothed with different helix angles and are in engagement with complementary external toothings 23, 11 of the drive element 7 and the driven element 9, simultaneously cause the drive piston to rotate when the adjusting piston 3 is axially displaced Output element 7, 9 achieved. Since both elements 7, 9 are connected to the corresponding control drive components such as drive wheel 2 and camshaft (not shown), there is a phase shift, for example in the direction of early opening and early closing of the valves.
Bezugszeichenreference numeral
1 Vorichtung 1 3 Kolbenplatte1 device 1 3 piston plate
2 Antriebsrad 14 Stirnfläche2 drive wheel 14 end face
3 Verstellelement 1 5 Stirnfläche3 Adjustment element 1 5 end face
4 innere Mantelfläche 16 Innenfläche4 inner surface 16 inner surface
5 Abschnitt 1 7 Blechzylinder5 Section 1 7 sheet metal cylinders
6 Abschnitt 18 Druckraum6 Section 18 Pressure room
7 Antriebselement 1 9 Druckraum7 Drive element 1 9 pressure chamber
8 Nabe 20 Druckfeder8 hub 20 compression spring
9 Abtriebselement 21 Druckmittelleitung9 output element 21 pressure medium line
10 Flansch 22 Druckmittelleitung10 flange 22 pressure medium line
1 1 Außenverzahnung 23 Außenverzahnung1 1 external toothing 23 external toothing
12 Außenmantelfläche 12 outer surface

Claims

Ansprüche Expectations
1 . Vorrichtung (1 ) zum Verändern der Steuerzeiten einer Brennkraftmaschine, die innerhalb eines Steuertriebs von zumindest einer Nockenwelle, vorzugs¬ weise zwischen dieser und einem mit der Nockenwelle in Antriebsverbindung stehenden Antriebsrad (2) angeordnet ist, bestehend aus einem über hydrauli¬ sche Mittel axial verschiebbaren, hülsenartigen Verstellelement (3), welches zwei verzahnte Abschnitte (5, 6) aufweist, wobei der erste Abschnitt (5) mit einer Verzahnung (23) eines mit dem Antriebsrad (2) verbundenen Antriebs¬ elements (7) und der zweite Abschnitt (6) mit einem mit der Nockenwelle verbundenen Abtriebselement (9) zusammenwirkt, dadurch gekennzeichnet, daß das hülsenartige Verstellelement (3) aus einem polymeren Kunststoff herge¬ stellt ist.1 . Device (1) for changing the control times of an internal combustion engine, which is arranged within a control drive of at least one camshaft, preferably between this and a drive wheel (2) which is in drive connection with the camshaft, comprising an axially displaceable by hydraulic means , sleeve-like adjusting element (3), which has two toothed sections (5, 6), the first section (5) having a toothing (23) of a drive element (7) connected to the drive wheel (2) and the second section ( 6) cooperates with an output element (9) connected to the camshaft, characterized in that the sleeve-like adjusting element (3) is made of a polymer plastic.
2. Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, daß der Kunststoff ein Duroplast ist.2. Device according to claim 1, characterized in that the plastic is a thermoset.
3. Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, daß der Kunststoff ein Thermoplast ist.3. Device according to claim 1, characterized in that the plastic is a thermoplastic.
4. Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, daß der Kunststoff mit Glasfasern verstärkt ist.4. The device according to claim 1, characterized in that the plastic is reinforced with glass fibers.
5. Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, daß der Kunststoff ein Polyurethan ist. 5. The device according to claim 1, characterized in that the plastic is a polyurethane.
PCT/EP1996/003365 1995-12-11 1996-07-31 Device for varying the valve timing of an internal combustion engine WO1997021908A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19546103A DE19546103A1 (en) 1995-12-11 1995-12-11 Device for changing the timing of an internal combustion engine
DE19546103.7 1995-12-11

Publications (1)

Publication Number Publication Date
WO1997021908A1 true WO1997021908A1 (en) 1997-06-19

Family

ID=7779741

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1996/003365 WO1997021908A1 (en) 1995-12-11 1996-07-31 Device for varying the valve timing of an internal combustion engine

Country Status (2)

Country Link
DE (1) DE19546103A1 (en)
WO (1) WO1997021908A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7077091B2 (en) 2004-09-24 2006-07-18 3M Innovative Properties Company Polymer matrix composite pushrod

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10339871A1 (en) * 2003-08-29 2005-03-24 Ina-Schaeffler Kg Device for changing the control times of gas exchange valves of an I.C. engine has a drive unit having a central axial bore which can be closed using a closing screw formed in a side lid of the drive unit
DE10358888B4 (en) * 2003-12-16 2018-12-27 Schaeffler Technologies AG & Co. KG Internal combustion engine with a hydraulic device for adjusting the rotational angle of a camshaft relative to a crankshaft

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3386301A (en) * 1964-09-16 1968-06-04 Koyama Mikio Camshaft driving system for internal combustion engines
DE4321003A1 (en) * 1993-06-24 1995-01-05 Schaeffler Waelzlager Kg Device for adjusting the valve timings of an internal combustion engine
US5426992A (en) * 1992-05-29 1995-06-27 Nippondenso Co., Ltd. Non-backlash toothed wheel mechanism and rotational phase adjuster therewith

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3386301A (en) * 1964-09-16 1968-06-04 Koyama Mikio Camshaft driving system for internal combustion engines
US5426992A (en) * 1992-05-29 1995-06-27 Nippondenso Co., Ltd. Non-backlash toothed wheel mechanism and rotational phase adjuster therewith
DE4321003A1 (en) * 1993-06-24 1995-01-05 Schaeffler Waelzlager Kg Device for adjusting the valve timings of an internal combustion engine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
KLAUS W. FISCHER: "thermoplastiche kunststoffe im aggregatebereich von kraftfarhzeugen", A.T.Z. AUTOMOBILTECHNISCHE ZEITSCHRIFT, vol. 86, no. 3, March 1984 (1984-03-01), SCHÄBISCH GMÜND DEUTSCHLAND, pages 91 - 96, XP002015143 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7077091B2 (en) 2004-09-24 2006-07-18 3M Innovative Properties Company Polymer matrix composite pushrod

Also Published As

Publication number Publication date
DE19546103A1 (en) 1997-06-12

Similar Documents

Publication Publication Date Title
EP2938906B1 (en) Divided toothed wheel
DE69913345T2 (en) ELECTRIC POWER STEERING
DE4031762B4 (en) Clutch disc with space-saving idle damper
DE112008001704B4 (en) Differential assembly with preload adjustment mechanism
DE102010002285A1 (en) Schraubradgetriebe for steering a motor vehicle
EP1121543A1 (en) Piston with pressure-dependent sealing effect for a piston-cylinder arrangement, especially a shock absorber piston
DE102006010268B4 (en) Helical gear for rack and pinion steering
WO2004035995A1 (en) Adjusting device
DE202018104386U1 (en) Adjustment drive for a steering column, motor-adjustable steering column for a motor vehicle, and apparatus for performing a method for adjusting a bearing assembly of an adjustment
EP1482213A1 (en) Control device for a change-speed gearbox
EP2235311B1 (en) Transmission unit and drive transmission unit
WO1997021908A1 (en) Device for varying the valve timing of an internal combustion engine
DE3601644A1 (en) ELASTIC COUPLING
DE19810918C2 (en) friction clutch
EP0303113A1 (en) Process for producing a toothed wheel operating at a low-noise level
EP1288419B1 (en) Manufacturing method of a toothing for an actuator and door closer with elements made following the method
EP1208313B1 (en) Synchroniser body consisting of a sheet-metal moulded part
DE102020129738A1 (en) Harmonic gearing, method for producing harmonic gearing and internal combustion engine with camshaft adjusters having harmonic gearing
DE102010029097B3 (en) Shearing gear wheel i.e. anti backslash gear wheel, for transmission of fluctuating or pulsating torques, has spring assembly firmly fixed to auxiliary gear wheel and flange, which is connected with main gear wheel in torque-proof manner
DE102004058177B4 (en) gear
DE102020100508A1 (en) Hub and method of making a hub
EP1460303A1 (en) Torsion vibration damper
EP3759374A1 (en) Centrifugal pendulum device with a wave spring washer; clutch disc; and powertrain
DE10159862B4 (en) Switching elasticity for an automated manual transmission
DE102004058178A1 (en) gear

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): DE JP KR US

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
NENP Non-entry into the national phase

Ref country code: JP

Ref document number: 97521635

Format of ref document f/p: F

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642