EP0535031A1 - Device for distributing oil in a camshaft. - Google Patents

Device for distributing oil in a camshaft.

Info

Publication number
EP0535031A1
EP0535031A1 EP91910773A EP91910773A EP0535031A1 EP 0535031 A1 EP0535031 A1 EP 0535031A1 EP 91910773 A EP91910773 A EP 91910773A EP 91910773 A EP91910773 A EP 91910773A EP 0535031 A1 EP0535031 A1 EP 0535031A1
Authority
EP
European Patent Office
Prior art keywords
oil
camshaft
channel
insert
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.)
Granted
Application number
EP91910773A
Other languages
German (de)
French (fr)
Other versions
EP0535031B1 (en
Inventor
Herbert Ampferer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dr Ing HCF Porsche AG
Original Assignee
Dr Ing HCF Porsche AG
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 Dr Ing HCF Porsche AG filed Critical Dr Ing HCF Porsche AG
Publication of EP0535031A1 publication Critical patent/EP0535031A1/en
Application granted granted Critical
Publication of EP0535031B1 publication Critical patent/EP0535031B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F01L1/02—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 a device according to the preamble of claim 1.
  • a hollow, built camshaft in which a cylindrical insert is arranged for the distribution of lubricating oil.
  • This insert is provided on its outer surface with protrusions which abut the inner surface of the camshaft, so that an annular cavity remains between the camshaft and the insert.
  • Lubricating oil is fed into this cavity via bearing points of the camshaft, which is supplied to the friction pairing between the cam and the valve tappet via bores leading from the cavity to the cam surfaces.
  • 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 in the camshaft.
  • This device for distributing oil enables the targeted guidance of several oil flows within one 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 at least in sections of one 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 secure the lubrication of bearing points via the first channel, while hydraulically connectable and disengageable 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.
  • Both channels can be arranged in a bearing point of the camshaft or can each be connected to a separate bearing point.
  • Plastic can be produced and is with a slight oversize in the
  • the camshaft In the area of the cavity, the camshaft is provided with ribs arranged between the oil channel and the inner surface of the camshaft, which ribs
  • the first sealing section consists of several radially acting
  • a partial section through a device enlarges a section along the line II-II according to Fig.l, enlarges a second embodiment of a detail X according to
  • Fig.l, Fig.4 enlarged 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.
  • 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.
  • 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 centrally running oil channel 5 is arranged, which extends from an open end 6 of the camshaft 1 to close to the opposite end of the section E.
  • 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 projecting 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.
  • 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 bushing 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 25 arrives.
  • the sealing elements 10 of the sealing section 9 are designed in the manner of a truncated cone according to FIG. 1, but can also be bead-like in accordance with a second embodiment (FIG. 3) from cylindrical rings 30 or in accordance with a third embodiment (FIG. 4).
  • the second channels 16 adjacent seal element 10 is designed cylindrically.
  • 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 is made in a simple manner from a filled plastic, e.g. PA66 GF35, can be produced, the cover 18 being applied by means of ultrasonic welding.
  • a filled plastic e.g. PA66 GF35
  • the complete insert 4 is pushed into the camshaft 1 in such a way that the oil duct 5 is flush with the camshaft 1 at the end 6, then the bushing 23 is pressed in.
  • 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 supplied from an oil circuit to 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

Un dispositif pour la distribution d'huile dans un arbre à cames d'un moteur à combustion interne comporte un insert cylindrique (4) s'étendant axialement dans l'arbre à cames (1) et lequel conduit deux flux d'huile séparés dans l'arbre à cames (1). L'insert (4) présente un canal d'huile (5) disposé de manière centrale pour un flux d'huile, ainsi qu'un creux (7) ménagé entre l'insert (4) et l'arbre à cames (1) et constituant une partie du dispositif pour un autre flux d'huile. Les deux flux d'huile sont amenés à travers des canaux radiaux (15, 16) à l'arbre, ou bien en sont évacués.A device for distributing oil in a camshaft of an internal combustion engine comprises a cylindrical insert (4) extending axially in the camshaft (1) and which conducts two separate oil flows in the camshaft (1). The insert (4) has an oil channel (5) arranged centrally for an oil flow, as well as a recess (7) formed between the insert (4) and the camshaft (1 ) and constituting a part of the device for another oil flow. The two oil flows are brought through or out of radial channels (15, 16) to the shaft.

Description

Vorrichtung zur Verteilung von Öl in einer Nockenwelle Device for distributing oil in a camshaft
Die Erfindung betrifft eine Vorrichtung nach dem Oberbegriff des Anspruches 1.The invention relates to a device according to the preamble of claim 1.
Aus der GB 2156485 ist eine hohle, gebaute Nockenwelle bekannt, in der zur Verteilung von Schmieröl ein zylindrischer Einsatz angeordnet ist. Dieser Einsatz ist auf seiner äußeren Oberfläche mit Vorsprüngen versehen, die an der inneren Oberfläche der Nockenwelle anliegen, so daß ein kreisringförmiger Hohlraum zwischen der Nockenwelle und dem Einsatz verbleibt. In diesen Hohlraum wird über Lagerstellen der Nockenwelle Schmieröl eingespeist, welches über von dem Hohlraum zu den Auf!aufflächen von Nocken führende Bohrungen der Reibpaarung zwischen Nocken und Ventilstößel zugeführt wird. Mit dieser Anordnung ist es möglich, einen einzigen Ölstrom mit einem bestimmten Öldruck in den Hohlraum zu führen und an verschiedenen Stellen entlang der Nockenwelle austreten zu lassen.From GB 2156485 a hollow, built camshaft is known in which a cylindrical insert is arranged for the distribution of lubricating oil. This insert is provided on its outer surface with protrusions which abut the inner surface of the camshaft, so that an annular cavity remains between the camshaft and the insert. Lubricating oil is fed into this cavity via bearing points of the camshaft, which is supplied to the friction pairing between the cam and the valve tappet via bores leading from the cavity to the cam surfaces. With this arrangement it is possible to lead a single oil flow into the cavity with a certain oil pressure and to let it emerge at various points along the camshaft.
Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zur Verteilung von Öl in einer Nockenwelle zu schaffen, die es ermöglicht, mehrere Olströme unabhängig voneinander in der Nockenwelle 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 in the camshaft.
Die Lösung dieser Aufgabe gelingt mit den Merkmalen des Patentanspruches 1. Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen benannt.This object is achieved with the 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 mehrerer Olströme innerhalb einer Nockenwelle. Die Olströme sind dabei völlig voneinander getrennt und können daher unterschiedliche Drücke, Massenströme, Strömungsrichtungen etc. aufweisen.This device for distributing oil enables the targeted guidance of several oil flows within one camshaft. The oil flows are completely separated from one another and can therefore have different pressures, mass flows, flow directions, etc.
Der zentral in dem Einsatz angeordnete Ölkanal ist über einen ersten, radial verlaufenden Kanal an einen Olkreislauf 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 Einsatz und der Nockenwelle erstreckt. In diesem Hohlraum wird ein zweiter Ölstrom geführt, der über einen zweiten Kanal an den Olkreislauf angeschlossen ist.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 at least in sections of one 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.
Zwischen erstem und zweitem Kanal weist der Einsatz einen ersten Dichtabschnitt auf, der den Hohlraum axial einseitig begrenzt und die Olströme voneinander trennt.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 Olströme 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.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 secure the lubrication of bearing points via the first channel, while hydraulically connectable and disengageable cams are actuated with the aid of the second channel.
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 Druckölström durch einen der Kanäle in die Nockenwelle gespeist, während das von dem Stellkolben verdrängte, drucklose Olvolumen über den zweiten Kanal abgeführt wird. Beide Kanäle können dabei in einer Lagerstelle der Nockenwelle angeordnet sein oder jeweils an eine separate Lagerstelle angeschlossen sein.In a further 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. Both channels can be arranged in a bearing point of the camshaft or can each be connected to a separate bearing point.
Der Einsatz ist leichtgewichtig, kostensparend und toleranzunempfindlich ausThe use is lightweight, cost-saving and insensitive to tolerances
Kunststoff herstellbar und wird mit einem geringfügigen Übermaß in diePlastic can be produced and is with a slight oversize in the
Nockenwelle eingepreßt.Pressed in camshaft.
Zur Vermeidung von transversalen Schwingungen des Einsatzes in derTo avoid transverse vibrations of use in the
Nockenwelle ist er im Bereich des Hohlraumes mit zwischen dem Ölkanal und der inneren Oberfläche der Nockenwelle angeordneten Rippen versehen, die denIn the area of the cavity, the camshaft is provided with ribs arranged between the oil channel and the inner surface of the camshaft, which ribs
Hohlraum in mehrere Ölnuten unterteilt.Cavity divided into several oil grooves.
Der erste Dichtabschnitt besteht aus mehreren radial wirkendenThe first sealing section consists of several radially acting
Dichtelementen, die die lströme wirksam voneinander trennen undSealing elements that effectively separate the oil flows and
Schwingungen des Einsatzes in diesem Bereich vermeiden. Anhand von Figuren wird ein Ausführungsbeispiel der Erfindung näher erläutert.Avoid vibrations in this area. An exemplary embodiment of the invention is explained in more detail with reference to figures.
inen Teilschnitt durch eine Vorrichtung, ergrößert einen Schnitt entlang der Linie II-II gemäß Fig.l, ergrößert eine zweite Ausführungsform einer Einzelheit X gemäßa partial section through a device, enlarges a section along the line II-II according to Fig.l, enlarges a second embodiment of a detail X according to
Fig.l, Fig.4 vergrößert eine dritte Ausführungsform einer Einzelheit X gemäßFig.l, Fig.4 enlarged a third embodiment of a detail X according to
Fig.l, Fig.5 vergrößert eine Einzelheit Y gemäß Fig.l und Fig.6 vergrößert eine Einzelheit Z gemäß Fig.l.Fig. 1, Fig. 5 enlarges a detail Y according to Fig. 1 and Fig. 6 enlarges a detail Z according to Fig.
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.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 centrally running oil channel 5 is arranged, which extends from an open end 6 of the camshaft 1 to close to the opposite end of the section E.
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.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 Olkreislauf der Brennkraftmaschine 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.
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 Olkreislauf angeschlossen ist.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.Radially projecting 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.
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.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 bushing 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 25 arrives.
Die Dichtelemente 10 des Dichtabschnittes 9 sind gemäß Fig.l 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.The sealing elements 10 of the sealing section 9 are designed in the manner of a truncated cone according to FIG. 1, but can also be bead-like 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 second channels 16 adjacent seal element 10 is designed cylindrically.
Der zweite Dichtabschnitt 19 und der in der Buchse 23 gelagerte Teil des Ölkanales 5 weisen umlaufende Dichtlippen 31 auf.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.The insert 4 is made in a simple manner from a filled plastic, e.g. PA66 GF35, can be produced, the cover 18 being applied by means of ultrasonic welding.
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. 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 Olkreislauf 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 Olkreislauf zurückgeführt.During assembly, the complete insert 4 is pushed into the camshaft 1 in such a way that the oil duct 5 is flush with the camshaft 1 at the end 6, then the bushing 23 is pressed in. 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 supplied from an oil circuit to 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.
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 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

P a t e n t a n s p r ü c h e Patent claims
1. Vorrichtung zur Verteilung von Öl in einer Nockenwelle einer Brennkraftmaschine, mit an einen Olkreislauf angeschlossenen Lagerstellen für die Nockenwelle und mit einem sich axial innerhalb der Nockenwelle erstreckenden, zylindrischen Einsatz, welcher einen Hohlraum zwischen der Nockenwelle und dem Einsatz begrenzt, dadurch gekennzeichnet, daß der Einsatz (4) einen zentral verlaufenden Ölkanal (5) aufweist, der über einen ersten Kanal (15) in einer ersten Lagerstelle (3) mit dem Olkreislauf verbunden ist, und daß der Einsatz (4) zumindest abschnittsweise von dem Hohlraum (7) koaxial umgeben ist, und daß der Hohlraum (7) über einen zweiten Kanal (16) an den Olkreislauf angeschlossen ist.1. Device for distributing oil in a camshaft of an internal combustion engine, with bearings connected to an oil circuit for the camshaft and with an axially extending inside the camshaft, cylindrical insert which limits a cavity between the camshaft and the insert, characterized in that the insert (4) has a central oil channel (5) which is connected to the oil circuit via a first channel (15) in a first bearing point (3), and that the insert (4) at least in sections from the cavity (7) is coaxially surrounded, and that the cavity (7) is connected to the oil circuit via a second channel (16).
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der zweite Kanal (16) über eine zweite Lagerstelle (3a) mit dem Olkreislauf verbunden ist.2. Device according to claim 1, characterized in that the second channel (16) is connected to the oil circuit via a second bearing point (3a).
3. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der zweite Kanal (16) über die erste Lagerstelle (3) mit dem Olkreislauf verbunden ist.3. Apparatus according to claim 1, characterized in that the second channel (16) via the first bearing point (3) is connected to the oil circuit.
4. Vorrichtung nach den Ansprüchen 2 oder 3, dadurch gekennzeichnet, daß der Einsatz (4) zwischen dem ersten Kanal (15) und dem zweiten Kanal (16) einen den Hohlraum (7) axial begrenzenden, radial wirkenden Dichtabschnitt (9) aufweist.4. Device according to claims 2 or 3, characterized in that the insert (4) between the first channel (15) and the second channel (16) has a radially acting sealing portion (9) axially delimiting the cavity (7).
5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß der Dichtabschnitt (9) mehrere, axial beabstandete Dichtelemente (10) aufweist.5. The device according to claim 4, characterized in that the sealing section (9) has a plurality of axially spaced sealing elements (10).
6. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß der Einsatz (4) beiderseits des Dichtabschnittes (9) je einen, den Ölkanal (5) benachbart der Kanäle (15, 16) koaxial umschließenden Ringspalt (20) aufweist.6. The device according to claim 4, characterized in that the insert (4) on both sides of the sealing section (9) each has an oil channel (5) adjacent to the channels (15, 16) coaxially surrounding annular gap (20).
7. Vorrichtung nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Einsatz (4) im Bereich des Hohlraumes (7) radial vorstehende, den Einsatz (4) in def Nockenwelle (1) abstützende Rippen (21) aufweist.7. The device according to one or more of the preceding claims, characterized in that the insert (4) in the region of the cavity (7) radially projecting ribs (21) supporting the insert (4) in the camshaft (1).
8. Vorrichtung nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Einsatz (4) benachbart des ersten Kanales (15) einen zweiten, radial wirkenden Dichtabschnitt (19) aufweist. 8. The device according to one or more of the preceding claims, characterized in that the insert (4) adjacent to the first channel (15) has a second, radially acting sealing portion (19).
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
DE4019766 1990-06-21
DE4019766A DE4019766A1 (en) 1990-06-21 1990-06-21 DEVICE FOR DISTRIBUTING OIL IN A CAMSHAFT
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 true EP0535031A1 (en) 1993-04-07
EP0535031B1 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

Country Status (5)

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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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Also Published As

Publication number Publication date
DE4019766C2 (en) 1992-04-23
DE4019766A1 (en) 1992-01-09
US5273007A (en) 1993-12-28
DE59102578D1 (en) 1994-09-22
EP0535031B1 (en) 1994-08-17
JPH05507989A (en) 1993-11-11
WO1991019887A1 (en) 1991-12-26

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