EP0535031B1 - Device for distributing oil in a camshaft - Google Patents

Device for distributing oil in a camshaft Download PDF

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Publication number
EP0535031B1
EP0535031B1 EP91910773A EP91910773A EP0535031B1 EP 0535031 B1 EP0535031 B1 EP 0535031B1 EP 91910773 A EP91910773 A EP 91910773A EP 91910773 A EP91910773 A EP 91910773A EP 0535031 B1 EP0535031 B1 EP 0535031B1
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EP
European Patent Office
Prior art keywords
oil
camshaft
insert
duct
cavity
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
Application number
EP91910773A
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German (de)
French (fr)
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EP0535031A1 (en
Inventor
Herbert Ampferer
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Dr Ing HCF Porsche AG
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Dr Ing HCF Porsche AG
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Publication of EP0535031A1 publication Critical patent/EP0535031A1/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
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/02—Arrangements of lubricant conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
    • F01M9/10—Lubrication of valve gear or auxiliaries
    • F01M9/101—Lubrication of valve gear or auxiliaries of cam surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
    • F01M9/10—Lubrication of valve gear or auxiliaries
    • F01M9/102—Lubrication of valve gear or auxiliaries of camshaft bearings
    • 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
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L2001/0475—Hollow camshafts
    • 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
    • F01L2810/00—Arrangements solving specific problems in relation with valve gears
    • F01L2810/02—Lubrication
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2101—Cams

Definitions

  • the invention relates to an internal combustion engine according to the preamble of claim 1, as known for example from FR-A-54 24 94.
  • one and the same oil flow within the oil channel, which runs centrally in an insert arranged in the camshaft, can be routed to distant lubrication points and within the cavity, which exists between the insert and the camshaft, to nearby lubrication points.
  • the invention has for its object to provide a device for distributing oil in a camshaft, which makes it possible to conduct several oil flows independently of one another within the camshaft.
  • This device for distributing oil enables the targeted guidance of a first and a second oil flow within a camshaft.
  • the oil flows are completely separated from one another and can therefore have different pressures, mass flows, flow directions, etc.
  • the oil channel arranged centrally in the insert is connected to an oil circuit via a first, radially running channel and leads a first oil flow, for example from one end of the camshaft to one or more bearing points.
  • the oil channel is coaxially enclosed at least in sections by an annular cavity which is located between the coaxially enclosed annular cavity which extends between the insert and the camshaft.
  • a second oil flow is conducted in this cavity and is connected to the oil circuit via a second channel.
  • the insert has a first sealing section which axially delimits the cavity on one side and separates the oil flows from one another.
  • the device is advantageously suitable for various applications.
  • two oil flows can be fed into the oil channel or the cavity from one end of the camshaft in order to ensure the lubrication of bearing points via the first channel, while hydraulically activatable and deactivatable cams are actuated with the aid of the second channel.
  • the device can be used to actuate a hydraulically actuated phase converter.
  • the phase converter changes the relative rotational position between the intake and exhaust camshafts of an internal combustion engine by axially displacing an actuating piston in two end positions.
  • a pressure oil flow is fed through one of the channels into the camshaft, while the unpressurized oil volume displaced by the control piston is discharged via the second channel.
  • the insert is lightweight, cost-saving and tolerance-insensitive to manufacture from plastic and is pressed into the camshaft with a slight oversize. To avoid transverse vibrations of the insert in the camshaft, it is provided in the region of the cavity with ribs arranged between the oil channel and the inner surface of the camshaft, which divides the cavity into several oil grooves.
  • the first sealing section consists of several radially acting sealing elements, which effectively separate the oil flows from one another and prevent vibrations of the insert in this area.
  • a hollow, built-up camshaft 1 of an internal combustion engine, not shown, has cams 2 for actuating lift valves, also not shown, and is held in several bearing points 3.
  • an axially extending insert 4 is provided within the camshaft 1, in which a central oil passage 5 is arranged, which extends from an open end 6 of the camshaft 1 to close to the opposite end of the section E. From the end 6, the oil channel 5 is coaxially surrounded along a section H by a cavity 7 which is formed between the oil channel 5 and the inner surface 8 of the camshaft 1.
  • the insert 4 has a first sealing section 9, which consists of a plurality of axially spaced, radially acting sealing elements 10.
  • the oil channel 5 is connected via a radial first channel 15 to a first bearing 3, which is connected to an oil circuit, not shown, of the internal combustion engine.
  • the cavity 7 is connected to the sealing section 9 via a radially extending, second channel 16 with a second bearing 3a, which is also connected to the oil circuit.
  • the insert 4 has a cover 18 which closes the oil channel 5 and which together with the adjoining one Part of the insert 4 forms a second sealing section 19.
  • the sealing sections 9 and 19 are designed adjacent to the first channel 15 such that an annular gap 20 coaxially surrounding the oil channel 5 remains between them and the inner surface 8.
  • Radially protruding ribs 21 are arranged along the section H from the oil channel 5 and support the insert 4 in the region of the cavity 7 against the surface 8 and thus avoid vibrations of the insert 4 in the camshaft 1. 2, the ribs 21 subdivide the cavity 7 into axially extending oil grooves 22.
  • the first sealing section 9 and the cavity 7 are designed adjacent to the second channel 16 in such a way that between them and the inner surface 8 there is another, coaxially enclosing the oil channel 5 Annular gap 20 remains.
  • a bush 23 is pressed in oil-tightly, which receives the oil channel 5 and delimits the cavity 7 so that the oil flowing in it from a bore 24 of the camshaft 1 according to FIG Phase converter 25 arrives.
  • the sealing elements 10 of the sealing section 9 are designed in the manner of a truncated cone in accordance with FIG. 1, but can also be shaped like a bead in accordance with a second embodiment (FIG. 3) from cylindrical rings 30 or in accordance with a third embodiment (FIG. 4).
  • the sealing element 10 adjacent to the second channel 16 is cylindrical.
  • the second sealing section 19 and the part of the oil channel 5 supported in the bush 23 have circumferential sealing lips 31.
  • the insert 4 can be produced in a simple manner from a filled plastic, for example PA66 GF35, the cover 18 being applied by means of ultrasonic welding. During assembly, the complete insert 4 is pushed into the camshaft 1 in such a way that the oil channel 5 is flush with the camshaft 1 at the end 6, then the bushing 23 is pressed in.

Abstract

A device for distributing oil in a camshaft of an internal combustion engine comprises a cylindrical insert (4) which extends axially in the camshaft (1) and which conveys two separate streams of oil in the camshaft (1). The insert (4) has a central oil (5) channel for an oil stream and a cavity (7) for a second oil stream which forms part of the device between the insert (4) and the camshaft (1). Both oil streams are conveyed to or from the camshaft in radial channels (15, 16).

Description

Die Erfindung betrifft eine Brennkraftmaschine nach dem Oberbegriff des Anspruches 1, wie zum Beispiel aus der FR-A-54 24 94 bekannt.The invention relates to an internal combustion engine according to the preamble of claim 1, as known for example from FR-A-54 24 94.

Mit einer solchen Anordnung kann ein und derselbe Ölstrom innerhalb des Ölkanales, der zentral in einem in der Nockenwelle angeordneten Einsatz verläuft, zu entfernt liegenden Schmierstellen und innerhalb des Hohlraumes, den es zwischen dem Einsatz und der Nockenwelle gibt, zu nahe gelegenen Schmierstellen geführt werden.With such an arrangement, one and the same oil flow within the oil channel, which runs centrally in an insert arranged in the camshaft, can be routed to distant lubrication points and within the cavity, which exists between the insert and the camshaft, to nearby lubrication points.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zur Verteilung von Öl in einer Nockenwelle zu schaffen, die es ermöglicht, mehrere Ölströme innerhalb der Nockenwelle unabhängig voneinander zu führen.The invention has for its object to provide a device for distributing oil in a camshaft, which makes it possible to conduct several oil flows independently of one another within the camshaft.

Die Lösung dieser Aufgabe gelingt mit den kennzeichnenden Merkmalen des Patentanspruches 1. Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen benannt.This object is achieved with the characterizing features of patent claim 1. Advantageous refinements of the invention are specified in the subclaims.

Diese Vorrichtung zur Verteilung von Öl ermöglicht die gezielte Führung eines ersten und eines zweiten Ölstromes innerhalb einer Nockenwelle. Die Ölströme sind dabei völlig voneinander getrennt und können daher unterschiedliche Drücke, Massenströme, Strömungsrichtungen etc. aufweisen. Der zentral in dem Einsatz angeordnete Ölkanal ist über einen ersten, radial verlaufenden Kanal an einen Ölkreislauf angeschlossen und führt einen ersten Ölstrom z.B. von einem ende der Nockenwelle zu einer oder zu mehreren Lagerstellen. Der Ölkanal ist zumindest abschnittsweise von einem kreisringförmigen Hohlraum koaxial umschlossen, der sich zwischen dem kreisringförmigen Hohlraum koaxial umschlossen, der sich zwischen dem Einsatz und der Nockenwelle erstreckt. In diesem Hohlraum wird ein zweiter Ölstrom geführt, der über einen zweiten Kanal an den Ölkreislauf angeschlossen ist.
Zwischen erstem und zweitem Kanal weist der Einsatz einen ersten Dichtabschnitt auf, der den Hohlraum axial einseitig begrenzt und die Ölströme voneinander trennt.This device for distributing oil enables the targeted guidance of a first and a second oil flow within a camshaft. The oil flows are completely separated from one another and can therefore have different pressures, mass flows, flow directions, etc. The oil channel arranged centrally in the insert is connected to an oil circuit via a first, radially running channel and leads a first oil flow, for example from one end of the camshaft to one or more bearing points. The oil channel is coaxially enclosed at least in sections by an annular cavity which is located between the coaxially enclosed annular cavity which extends between the insert and the camshaft. A second oil flow is conducted in this cavity and is connected to the oil circuit via a second channel.
Between the first and second channel, the insert has a first sealing section which axially delimits the cavity on one side and separates the oil flows from one another.

Die Vorrichtung ist vorteilhafterweise für verschiedene Anwendungsfälle geeignet. So können beispielsweise von einem Ende der Nockenwelle aus zwei Ölströme in den Ölkanal bzw. den Hohlraum eingespeist werden, um über den ersten Kanal die Schmierung von Lagerstellen zu sichern, während mit Hilfe des zweiten Kanales hydraulisch zu- und abschaltbare Nocken betätigt werden.
In einem weiteren Anwendungsfall kann die Vorrichtung zur Betätigung eines hydraulisch beaufschlagten Phasenwandlers dienen. Der Phasenwandler ändert dabei die relative Drehlage zwischen Einlaß- und Auslaßnockenwelle einer Brennkraftmaschine durch axiales Verschieben eines Stellkolbens in zwei Endlagen. Je nach Verstellrichtung des Stellkolbens wird ein Druckölstrom durch einen der Kanäle in die Nockenwelle gespeist, während das von dem Stellkolben verdrängte, drucklose Ölvolumen über den zweiten Kanal abgeführt wird.The device is advantageously suitable for various applications. For example, two oil flows can be fed into the oil channel or the cavity from one end of the camshaft in order to ensure the lubrication of bearing points via the first channel, while hydraulically activatable and deactivatable cams are actuated with the aid of the second channel.
In another application, the device can be used to actuate a hydraulically actuated phase converter. The phase converter changes the relative rotational position between the intake and exhaust camshafts of an internal combustion engine by axially displacing an actuating piston in two end positions. Depending on the direction of adjustment of the control piston, a pressure oil flow is fed through one of the channels into the camshaft, while the unpressurized oil volume displaced by the control piston is discharged via the second channel.

Der Einsatz ist leichtgewichtig, kostensparend und toleranzunempfindlich aus Kunststoff herstellbar und wird mit einem geringfügigen Übermaß in die Nockenwelle eingepreßt.
Zur Vermeidung von transversalen Schwingungen des Einsatzes in der Nockenwelle ist er im Bereich des Hohlraumes mit zwischen dem Ölkanal und der inneren Oberfläche der Nockenwelle angeordneten Rippen versehen, die den Hohlraum in mehrere Ölnuten unterteilt.
Der erste Dichtabschnitt besteht aus mehreren radial wirkenden Dichtelementen, die die Ölströme wirksam voneinander trennen und Schwingungen des Einsatzes in diesem Bereich vermeiden.The insert is lightweight, cost-saving and tolerance-insensitive to manufacture from plastic and is pressed into the camshaft with a slight oversize.
To avoid transverse vibrations of the insert in the camshaft, it is provided in the region of the cavity with ribs arranged between the oil channel and the inner surface of the camshaft, which divides the cavity into several oil grooves.
The first sealing section consists of several radially acting sealing elements, which effectively separate the oil flows from one another and prevent vibrations of the insert in this area.

Anhand von Figuren wird ein Ausführungsbeispiel der Erfindung näher erläutert.An exemplary embodiment of the invention is explained in more detail with reference to figures.

Es zeigen:

Fig.1
einen Teilschnitt durch eine Vorrichtung,
Fig.2
vergrößert einen Schnitt entlang der Linie II-II gemäß Fig.1,
Fig.3
vergrößert eine zweite Ausführungsform einer Einzelheit X gemäß Fig.1,
Fig.4
vergrößert eine dritte Ausführungsform einer Einzelheit X gemäß Fig.1,
Fig.5
vergrößert eine Einzelheit Y gemäß Fig.1 und
Fig.6
vergrößert eine Einzelheit Z gemäß Fig.1.
Show it:
Fig. 1
a partial section through a device,
Fig. 2
enlarges a section along the line II-II according to FIG. 1,
Fig. 3
enlarges a second embodiment of a detail X according to FIG. 1,
Fig. 4
enlarges a third embodiment of a detail X according to FIG. 1,
Fig. 5
enlarges a detail Y according to Fig.1 and
Fig. 6
enlarges a detail Z according to FIG. 1.

Eine hohle, gebaute Nockenwelle 1 einer nicht gezeigten Brennkraftmaschine weist Nocken 2 zur Betätigung von ebenfalls nicht gezeigten Hubventilen auf und ist in mehreren Lagerstellen 3 gehalten. Entlang eines Abschnittes E ist innerhalb der Nockenwelle 1 ein sich axial erstreckender Einsatz 4 vorgesehen, in dem ein zentral verlaufender Ölkanal 5 angeordnet ist, der von einem offenen Ende 6 der Nockenwelle 1 aus bis nahe an das gegenüberliegende Ende des Abschnittes E verläuft.
Von dem Ende 6 aus ist der Ölkanal 5 entlang eines Abschnittes H koaxial von einem Hohlraum 7 umgeben, welcher zwischen dem Ölkanal 5 und der inneren Oberfläche 8 der Nockenwelle 1 ausgebildet ist.
In einem zwischen dem Abschnitt E und dem Abschnitt H verbleibenden Abschnitt D weist der Einsatz 4 einen ersten Dichtabschnitt 9 auf, der aus mehreren axial beabstandeten, radial wirkenden Dichtelementen 10 besteht.A hollow, built-up camshaft 1 of an internal combustion engine, not shown, has cams 2 for actuating lift valves, also not shown, and is held in several bearing points 3. Along a section E, an axially extending insert 4 is provided within the camshaft 1, in which a central oil passage 5 is arranged, which extends from an open end 6 of the camshaft 1 to close to the opposite end of the section E.
From the end 6, the oil channel 5 is coaxially surrounded along a section H by a cavity 7 which is formed between the oil channel 5 and the inner surface 8 of the camshaft 1.
In a section D remaining between section E and section H, the insert 4 has a first sealing section 9, which consists of a plurality of axially spaced, radially acting sealing elements 10.

Der Ölkanal 5 ist über einen radial verlaufenden, ersten Kanal 15 mit einer ersten Lagerstelle 3 verbunden, die an einen nicht gezeigten Ölkreislauf der Brennkraftmaschine angeschlossen ist.
Der Hohlraum 7 ist benachbart des Dichtabschnittes 9 über einen radial verlaufenden, zweiten Kanal 16 mit einer zweiten Lagerstelle 3a verbunden, die ebenfalls an den Ölkreislauf angeschlossen ist.The oil channel 5 is connected via a radial first channel 15 to a first bearing 3, which is connected to an oil circuit, not shown, of the internal combustion engine.
The cavity 7 is connected to the sealing section 9 via a radially extending, second channel 16 with a second bearing 3a, which is also connected to the oil circuit.

An dem dem Ende 6 gegenüberliegenden Ende 17 weist der Einsatz 4 einen den Ölkanal 5 verschließenden Deckel 18 auf, der gemeinsam mit dem angrenzenden Teil des Einsatzes 4 einen zweiten Dichtabschnitt 19 bildet. Die Dichtabschnitte 9 und 19 sind benachbart des ersten Kanales 15 derart gestaltet, daß zwischen ihnen und der inneren Oberfläche 8 ein den Ölkanal 5 koaxial umschließender Ringspalt 20 verbleibt.At the end 17 opposite the end 6, the insert 4 has a cover 18 which closes the oil channel 5 and which together with the adjoining one Part of the insert 4 forms a second sealing section 19. The sealing sections 9 and 19 are designed adjacent to the first channel 15 such that an annular gap 20 coaxially surrounding the oil channel 5 remains between them and the inner surface 8.

Entlang des Abschnittes H sind von dem Ölkanal 5 aus radial vorstehende Rippen 21 angeordnet, die den Einsatz 4 im Bereich des Hohlraumes 7 gegen die Oberfläche 8 abstützen und so Schwingungen des Einsatzes 4 in der Nockenwelle 1 vermeiden.
Gemäß Fig. 2 unterteilen die Rippen 21 den Hohlraum 7 in axial verlaufende Ölnuten 22. Der erste Dichtabschnitt 9 und der Hohlraum 7 sind benachbart des zweiten Kanales 16 derart gestaltet, daß zwischen ihnen und der inneren Oberfläche 8 ein weiterer, den Ölkanal 5 koaxial umschließender Ringspalt 20 verbleibt.Radially protruding ribs 21 are arranged along the section H from the oil channel 5 and support the insert 4 in the region of the cavity 7 against the surface 8 and thus avoid vibrations of the insert 4 in the camshaft 1.
2, the ribs 21 subdivide the cavity 7 into axially extending oil grooves 22. The first sealing section 9 and the cavity 7 are designed adjacent to the second channel 16 in such a way that between them and the inner surface 8 there is another, coaxially enclosing the oil channel 5 Annular gap 20 remains.

An dem vorderen Ende 6 der Nockenwelle 1 ist eine Buchse 23 öldicht eingepreßt, die den Ölkanal 5 aufnimmt und den Hohlraum 7 so begrenzt, daß das in ihm strömende Öl aus einer.Bohrung 24 der Nockenwelle 1 gemäß Fig.6 in einen nicht näher gezeigten Phasenwandler 25 gelangt.At the front end 6 of the camshaft 1, a bush 23 is pressed in oil-tightly, which receives the oil channel 5 and delimits the cavity 7 so that the oil flowing in it from a bore 24 of the camshaft 1 according to FIG Phase converter 25 arrives.

Die Dichtelemente 10 des Dichtabschnittes 9 sind gemäß Fig.1 kegelstumpfartig gestaltet, können aber auch gemäß einer zweiten Ausführungsform (Fig.3) aus zylindrischen Ringen 30 oder gemäß einer dritten Ausführungsform (Fig.4) wulstartig geformt sein. In allen Ausführungsformen ist das dem zweiten Kanal 16 benachbarte Dichtelement 10 zylindrisch gestaltet.
Der zweite Dichtabschnitt 19 und der in der Buchse 23 gelagerte Teil des Ölkanales 5 weisen umlaufende Dichtlippen 31 auf.The sealing elements 10 of the sealing section 9 are designed in the manner of a truncated cone in accordance with FIG. 1, but can also be shaped like a bead in accordance with a second embodiment (FIG. 3) from cylindrical rings 30 or in accordance with a third embodiment (FIG. 4). In all embodiments, the sealing element 10 adjacent to the second channel 16 is cylindrical.
The second sealing section 19 and the part of the oil channel 5 supported in the bush 23 have circumferential sealing lips 31.

Der Einsatz 4 ist in einfacher Weise aus einem gefüllten Kunststoff, z.B. PA66 GF35, herstellbar, wobei der Deckel 18 mittels Ultraschallschweißen aufgebracht ist.
Bei der Montage wird der komplette Einsatz 4 derart in die Nockenwelle 1 eingeschoben, daß der Ölkanal 5 an dem Ende 6 bündig mit der Nockenwelle 1 abschließt, anschließend wird die Buchse 23 eingepreßt.The insert 4 can be produced in a simple manner from a filled plastic, for example PA66 GF35, the cover 18 being applied by means of ultrasonic welding.
During assembly, the complete insert 4 is pushed into the camshaft 1 in such a way that the oil channel 5 is flush with the camshaft 1 at the end 6, then the bushing 23 is pressed in.

Beim Betrieb einer mit der Vorrichtung ausgestatteten Brennkraftmaschine wird über eine einen Teil des ersten Kanales 15 bildende Bohrung 32 in der Nockenwelle 1 Drucköl in den Ringkanal 20 eingespeist, welches durch den Ölkanal 5 in den Phasenwandler 25 gelangt. Dieses Öl wird aus einem Ölkreislauf der Brennkraftmaschine über die erste Lagerstelle 3 zugeführt.
Druckloses Öl wird dabei aus dem Phasenwandler 25 über die Bohrung 24 in die Ölnuten 22 geleitet und über den zweiten Kanal 16 und die zweite Lagerstelle 3 in den Ölkreislauf zurückgeführt.
Bei erneuter Betätigung des Phasenwandlers wird das Drucköl über die zweite Lagerstelle 3 in die Ölnuten 22 geführt, das drucklose Öl strömt in dem Ölkanal 5 vom Phasenwandler 25 zur ersten Lagerstelle 3.When an internal combustion engine equipped with the device is operated, pressure oil is fed into the annular channel 20 via a bore 32 in the camshaft 1 which forms part of the first channel 15 and which passes through the oil channel 5 into the phase converter 25. This oil is fed from an oil circuit of the internal combustion engine via the first bearing 3.
Unpressurized oil is conducted from the phase converter 25 through the bore 24 into the oil grooves 22 and returned to the oil circuit via the second channel 16 and the second bearing point 3.
When the phase converter is actuated again, the pressure oil is guided into the oil grooves 22 via the second bearing point 3, the unpressurized oil flows in the oil channel 5 from the phase converter 25 to the first bearing point 3.

Claims (3)

  1. An internal-combustion engine with a camshaft, which comprises bearing points connected to an oil circuit and a cylindrical insert (4) extending axially inside the camshaft and defining a cavity between the camshaft and the insert (4) and having an oil duct (5) which extends centrally and which conveys a first stream of oil and is connected to the oil circuit by way of a first duct (15) at a first bearing point (3), wherein the insert (4) is surrounded coaxially at least in part by the cavity (7) conveying a second stream of oil and connected to the oil circuit by way of a second duct (16), and wherein the insert (4) is provided between the first duct (15) and the second duct (16) with a radially acting sealing portion (9) bounding the cavity (7) axially, characterized in that the sealing portion is provided with a plurality of axially spaced sealing members (10), wherein the insert (4) is provided on both sides of the sealing portion (9) with a respective annular gap (20) coaxially surrounding the oil duct (5) - conveying the first stream of oil - adjacent to the ducts (15, 16), and the second duct (16) is connected to the oil circuit by way of a second bearing point (3a).
  2. An internal-combustion engine according to Claim 1, characterized in that the insert (4) comprises ribs (21) projecting radially in the region of the cavity (7) and supporting the insert (4) in the camshaft (1).
  3. An internal-combustion engine according to Claim 1, characterized in that adjacent to the first duct (15) the insert (4) has a second sealing portion (19) acting radially.
EP91910773A 1990-06-21 1991-06-15 Device for distributing oil in a camshaft Expired - Lifetime EP0535031B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4019766A DE4019766A1 (en) 1990-06-21 1990-06-21 DEVICE FOR DISTRIBUTING OIL IN A CAMSHAFT
DE4019766 1990-06-21
PCT/EP1991/001112 WO1991019887A1 (en) 1990-06-21 1991-06-15 Device for distributing oil in a camshaft

Publications (2)

Publication Number Publication Date
EP0535031A1 EP0535031A1 (en) 1993-04-07
EP0535031B1 true EP0535031B1 (en) 1994-08-17

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EP91910773A Expired - Lifetime EP0535031B1 (en) 1990-06-21 1991-06-15 Device for distributing oil in a camshaft

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US (1) US5273007A (en)
EP (1) EP0535031B1 (en)
JP (1) JPH05507989A (en)
DE (2) DE4019766A1 (en)
WO (1) WO1991019887A1 (en)

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US5325826A (en) * 1993-11-04 1994-07-05 Ford Motor Company Journal bearing oil diverter
DE4433277B4 (en) * 1994-09-19 2005-08-04 Deutz Ag Oil system of an internal combustion engine
DE4435659A1 (en) * 1994-10-05 1996-04-11 Bayerische Motoren Werke Ag IC engine with cam actuated load exchange valves
EP0826873B1 (en) * 1996-08-24 2000-05-24 Volkswagen Aktiengesellschaft Device for distributing fuel for a combustion engine
US5778841A (en) * 1997-02-26 1998-07-14 Cummins Engine Company, Inc. Camshaft for internal combustion engines
DE19757504B4 (en) * 1997-12-23 2005-03-31 Daimlerchrysler Ag Built camshaft for an internal combustion engine
JP4318770B2 (en) * 1998-10-05 2009-08-26 本田技研工業株式会社 Camshaft lubrication structure for multi-cylinder engines
EP1247005B1 (en) * 1999-12-30 2006-06-21 ThyssenKrupp Presta AG Shaft provided as a machine part with integrated conduits
KR20020082701A (en) * 2001-04-25 2002-10-31 현대자동차주식회사 Oil supply structure at a variable valve timing actuator
DE10125498A1 (en) * 2001-05-23 2002-12-19 Salzgitter Antriebstechnik Gmb Camshaft and method for manufacturing a camshaft
DE10160246C1 (en) * 2001-12-07 2003-04-17 Thyssen Krupp Automotive Ag Hollow shaft, e.g. drive shaft, has component, e.g. gear well, mounted on it by widening its end, e.g. by inserting conical mandrel, tube being supported by bush inserted into it at inner end of mandrel
US6742491B1 (en) 2002-12-17 2004-06-01 Tecumseh Products Company Engine lubrication system
DE10333850B4 (en) * 2003-07-24 2005-11-17 Muhr Und Bender Kg Built camshaft with camshaft adjuster
DE10346446A1 (en) 2003-10-07 2005-05-12 Daimler Chrysler Ag Camshaft adjuster for internal combustion engine with hydraulic medium guides has at least one hydraulic medium guide connected directly or via handover unit and/or channel outside camshaft to control unit of camshaft adjuster
DE102006013829A1 (en) * 2006-03-23 2007-09-27 Mahle International Gmbh Adjustable camshaft for motor vehicle internal combustion engines has inner and outer shafts and a hydraulic adjusting device
DE102006038680B4 (en) * 2006-08-17 2018-11-22 Bayerische Motoren Werke Aktiengesellschaft Lubrication device for a valve train of an internal combustion engine
US7455040B2 (en) * 2006-10-10 2008-11-25 Delphi Technologies, Inc. Hydraulic circuit for switchable cam followers
FR2925573A3 (en) * 2007-12-19 2009-06-26 Renault Sas Camshaft for internal combustion engine, has hollow camshaft tube for passing lubricating oil routed between inner surface of tube and exterior surface of cam follower that is inserted inside tube with longitudinal protrusions
DE102013011588A1 (en) 2013-07-10 2015-01-15 Daimler Ag Wave device for a motor vehicle
DE102013223018B4 (en) * 2013-11-12 2015-08-13 Bayerische Motoren Werke Aktiengesellschaft Drive unit, internal combustion engine, spacers for a fluid line arrangement and tool set for mounting a spacer
DE102014007591A1 (en) * 2014-05-26 2015-11-26 Thyssenkrupp Presta Teccenter Ag Camshaft with cap
JP2017120049A (en) * 2015-12-28 2017-07-06 株式会社クボタ Cylinder head cooling structure
US9970476B2 (en) 2016-02-19 2018-05-15 GM Global Technology Operations LLC Crankshaft assembly with core plug and method of manufacturing a crankshaft assembly
CN108087493A (en) * 2016-11-23 2018-05-29 通用汽车环球科技运作有限责任公司 Composite material vehicles shaft assembly
DE102021207293A1 (en) 2021-07-09 2023-01-12 Mahle International Gmbh camshaft plug

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DE363862C (en) * 1922-11-14 Marc Birkigt Device for distributing lubricating oil on engines with internal combustion by means of rotating shafts, in which the oil inlet is divided into two veins
FR542494A (en) * 1920-10-21 1922-08-12 Improvements made to the means for distributing liquid, by means of rotary shafts, along the latter, in particular to the means of this type included, for their lubrication, by certain internal combustion engines
JPS5537552A (en) * 1978-09-11 1980-03-15 Toyota Motor Corp Hollow cam shaft having oil pump configuration
JPS6073005A (en) * 1983-09-28 1985-04-25 Nippon Piston Ring Co Ltd Cam shaft with lubricating oil supplying function
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US5201247A (en) * 1988-01-14 1993-04-13 Mannesmann Aktiengesellschaft Assembled shaft and process for production thereof
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US5186129A (en) * 1992-03-30 1993-02-16 Ford Motor Company Intermittent oiling system for an internal combustion engine camshaft and valve train

Also Published As

Publication number Publication date
DE4019766A1 (en) 1992-01-09
EP0535031A1 (en) 1993-04-07
US5273007A (en) 1993-12-28
JPH05507989A (en) 1993-11-11
DE4019766C2 (en) 1992-04-23
DE59102578D1 (en) 1994-09-22
WO1991019887A1 (en) 1991-12-26

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