EP1514012A1 - Centrifugal oil separator for use in the crankcase of an internal combustion engine - Google Patents

Centrifugal oil separator for use in the crankcase of an internal combustion engine

Info

Publication number
EP1514012A1
EP1514012A1 EP03722543A EP03722543A EP1514012A1 EP 1514012 A1 EP1514012 A1 EP 1514012A1 EP 03722543 A EP03722543 A EP 03722543A EP 03722543 A EP03722543 A EP 03722543A EP 1514012 A1 EP1514012 A1 EP 1514012A1
Authority
EP
European Patent Office
Prior art keywords
centrifuge
oil separator
shaft
centrifugal oil
separator according
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
EP03722543A
Other languages
German (de)
French (fr)
Other versions
EP1514012B1 (en
Inventor
Alexander Berger
Roland NÖLL
Christoph Reckzügel
Timo Schmidt
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.)
Daimler AG
Original Assignee
DaimlerChrysler 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 DaimlerChrysler AG filed Critical DaimlerChrysler AG
Publication of EP1514012A1 publication Critical patent/EP1514012A1/en
Application granted granted Critical
Publication of EP1514012B1 publication Critical patent/EP1514012B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • 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
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F01M2013/0422—Separating oil and gas with a centrifuge device

Definitions

  • the invention relates to a centrifugal oil separator in a crankcase of an internal combustion engine according to the preamble of claim 1.
  • centrifugal oil separator Such a centrifugal oil separator is described in the publication DE 196 07 919 AI. Using this oil separator, oil particles in an oil-air mixture in a crankcase of an internal combustion engine can be separated and returned to the oil pan.
  • the centrifugal oil separator uses the principle to separate and remove the oil particles from the mixture by means of centrifugal forces.
  • the oil separator has a centrifuge housing with a separation space located therein, in which baffles are arranged, on which the oil particles can accumulate. The collected oil is drained off radially, the cleaned air is drained axially through an outflow channel in the centrifuge shaft.
  • centrifuge housing is usually flange-mounted and screwed onto a shaft driven by the internal combustion engine.
  • this requires a relatively high installation effort.
  • the invention is based on the problem of improving the ease of installation of centrifugal oil separators.
  • the oil separator should have good rotatability and a long service life.
  • the centrifugal oil separator according to the invention has a centrifuge housing made of plastic, into which a metal bushing is integrated, which is pushed onto the centrifuge shaft.
  • the centrifuge housing and the metal bush form a prefabricated unit that is to be pushed onto the shaft and connected to it.
  • the metal bushing is able to transmit high holding forces so that it can be securely attached to the centrifuge shaft.
  • the centrifuge housing made of plastic is characterized by a low weight, which in particular also results in lower centrifugal forces in the housing wall when the oil separator rotates.
  • the metal bushing can be pushed onto the centrifuge shaft with little play; Forces resulting from operation due to the play are easily absorbed by the metal bushing, the centrifuge housing is relieved of these forces, which ensures improved rotatability and a longer service life.
  • the centrifuge shaft is also designed as a separate component is which is rotatably connected to a rotating shaft of the internal combustion engine - for example the camshaft, the crankshaft or a balancer shaft.
  • the centrifugal oil separator with the separate centrifuge shaft can form a preassembled unit which is prefabricated and inserted into the internal combustion engine and connected to it.
  • an air guiding space can be enclosed, in particular in an airtight and pressure-tight manner, which serves to discharge the clean air after the oil has been separated.
  • the air guide space advantageously surrounds the centrifuge shaft in an annular manner, which communicates with the air guide space via radial openings through which the clean air can escape radially inward into an axially extending flow channel in the centrifuge shaft. The clean air can be removed from the oil separator via the axial flow channel.
  • the metal bushing For a firm connection between the metal bushing and the centrifuge housing, it may be expedient for the metal bushing to be injected into the centrifugal wheel.
  • a locking ring can be attached to the shaft. If necessary, a locknut can also be used, which is screwed onto the metal bushing.
  • FIG. 1 shows a section through a centrifugal oil separator in the crankcase of an internal combustion engine, which is placed on a chain wheel which is connected to a camshaft in a rotationally fixed manner
  • FIG. 2 shows an illustration of an oil separator corresponding to FIG. 1, but in a modified version.
  • the centrifugal oil separator 1 shown in FIG. 1 is non-rotatably connected to a camshaft 2 of an internal combustion engine and is seated on an end face of a chain wheel 3 which is flanged to the end of the camshaft 2 and is firmly coupled to the latter.
  • the oil separator 1 comprises a centrifuge housing 4, which is made of plastic, and a metal bushing 5, which is integrated in the centrifuge housing 4 and forms the hub of the centrifuge housing. Furthermore, the oil separator 1 comprises a centrifuge shaft 6, onto which the metal bushing 5 is pushed.
  • the metal bushing 5 is secured both in the circumferential direction and axially against inadvertent detachment from the centrifuge shaft 6.
  • a securing ring 8 is provided, which can be inserted into a circumferential groove on the centrifuge shaft 6 and is thereby secured against axial loss.
  • the entrainment in the circumferential direction takes place via a form-locking element 9, which is arranged radially between the centrifuge shaft 6 and the metal bush 5.
  • the centrifuge shaft 6 is designed as a separate component that is independent of the camshaft 2. For the connection between the oil separator 1 and the camshaft 2, the centrifuge shaft 6 is pushed into an axial recess in the chain wheel 3, in particular pushed under pressure, additional or alternative fastening measures also possibly being considered.
  • the oil separator 1 On the side facing away from the sprocket 3, the oil separator 1 has an oil separator cover 7, which is also seated on the centrifuge shaft 6.
  • the oil separator cover 7 also forms part of the oil separator 1 and, like the centrifuge housing 4, the metal bushing 5 and the centrifuge shaft 6, can be assembled to form a prefabricated unit.
  • a separating space 10 is formed, which rotates in a ring around the metal bushing 5 and in which the air-oil mixture flowing radially into the housing according to arrow 11 is separated into its components oil and air.
  • the inflow of the air-oil mixture takes place via a radial inflow channel 12 which is formed between an end face of the centrifuge housing 4 and the oil separator cover 7.
  • the mixture flows through an axial ring opening into the separating space 10, in which baffles 13 can be located, which are intended to assist the separation of the oil.
  • the separated oil is drained radially according to arrow 14 through outflow openings 15 in the peripheral wall of the centrifuge housing 4.
  • the clean air leaves the separating space 10 via axial outflow openings 16 in a side wall of the centrifuge housing 4 facing the chain wheel 3 and initially flows into an annular air guide space 18 which is located in a End recess of the sprocket 3 is located and is axially delimited by a wall side of the centrifuge housing 4 and radially inwards by the centrifuge shaft 6.
  • the air guide space 18 is in particular sealed airtight and pressure-tight from the surroundings.
  • a sealing ring 19 is provided between the centrifuge housing 4 and the chain wheel 3.
  • the clean air is guided from the air guide space 18 in the arrow direction 17 to the radial bores 20 and further through these radially inwards and is discharged axially via the flow channel 21 in the arrow direction 22 from the oil separator 1.
  • the structure of the oil separator 1 according to FIG. 2 corresponds in principle to that of the previous exemplary embodiment, but with the difference that a lock nut 23 is screwed onto the shaft 6 on the centrifuge shaft 6 for axially securing the metal bushing 5 and the centrifuge housing 4.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Centrifugal Separators (AREA)

Abstract

The invention relates to a centrifugal oil separator for use in the crankcase of an internal combustion engine. Said oil separator comprises a centrifuge housing (4) mounted on a rotating plastic centrifuge shaft (4) in a rotationally fixed manner. A metal bush (5) is integrated into the centrifuge housing (4) and is slipped onto the centrifuge shaft (6).

Description

Zentrifugal-Olabscheider in einem Kurbelgehäuse einer Brenn- kraftmaschine Centrifugal oil separator in a crankcase of an internal combustion engine
Die Erfindung bezieht sich auf einen Zentrifugal-Olabscheider in einem Kurbelgehäuse einer Brennkraftmaschine nach dem 0- berbegriff des Anspruches 1.The invention relates to a centrifugal oil separator in a crankcase of an internal combustion engine according to the preamble of claim 1.
Ein derartiger Zentrifugal-Olabscheider wird in der Druckschrift DE 196 07 919 AI beschrieben. Mittels dieses Ölab- scheiders können Olpartikel in einem Öl -Luft-Gemisch in einem Kurbelgehäuse einer Brennkraftmaschine abgeschieden und in die Ölwanne zurückgeführt werden. Der Zentrifugal- Olabscheider nutzt hierbei das Prinzip, durch Rotation die Olpartikel mit Hilfe von Zentrifugalkräften aus dem Gemisch abzutrennen und abzuleiten. Der Olabscheider besitzt ein Zentrifugengehäuse mit einem darin liegenden Abscheideraum, in welchem Schikanen angeordnet sind, an denen sich die Olpartikel anlagern können. Das gesammelte Öl wird radial abgeführt, die gereinigte Luft wird über einen Abstrδmkanal in der Zentrifugenwelle axial abgeleitet.Such a centrifugal oil separator is described in the publication DE 196 07 919 AI. Using this oil separator, oil particles in an oil-air mixture in a crankcase of an internal combustion engine can be separated and returned to the oil pan. The centrifugal oil separator uses the principle to separate and remove the oil particles from the mixture by means of centrifugal forces. The oil separator has a centrifuge housing with a separation space located therein, in which baffles are arranged, on which the oil particles can accumulate. The collected oil is drained off radially, the cleaned air is drained axially through an outflow channel in the centrifuge shaft.
Grundsätzlich ist bei derartigen Ölabscheidern auf Montagefreundlichkeit sowie einen sicheren Sitz auf der Zentrifugenwelle zu achten. Das Zentrifugengehäuse wird bei den bekannten Ölabscheidern üblicherweise auf eine von der Brennkraftmaschine angetriebene Welle angeflanscht und angeschraubt. Dies erfordert jedoch einen verhältnismäßig hohen Montageaufwand.In principle, such oil separators must be easy to install and ensure that they sit securely on the centrifuge shaft. In the known oil separators, the centrifuge housing is usually flange-mounted and screwed onto a shaft driven by the internal combustion engine. However, this requires a relatively high installation effort.
Der Erfindung liegt das Problem zugrunde, die Montagefreund- lichkeit von Zentrifugal-Ölabscheidern zu verbessern. Darüber hinaus soll eine gute Rotationsfähigkeit und lange Lebensdauer des Ölabscheiders gewährleistet sein.The invention is based on the problem of improving the ease of installation of centrifugal oil separators. In addition, the oil separator should have good rotatability and a long service life.
Dieses Problem wird erfindungsgemäß mit den Merkmalen des Anspruches 1 gelöst. Die Unteransprüche geben zweckmäßige Weiterbildungen an.This problem is solved according to the invention with the features of claim 1. The subclaims indicate appropriate further training.
Der erfindungsgemäße Zentrifugal-Olabscheider weist ein aus Kunststoff gefertigtes Zentrifugengehäuse auf, in welches eine Metallbuchse integriert ist, die auf die Zentrifugenwelle aufgeschoben ist. Das Zentrifugengehäuse und die Metallbuchse bilden eine vorgefertigte Einheit, die auf die Welle aufzuschieben und mit dieser zu verbinden ist. Die Metallbuchse ist in der Lage, hohe Haltekräfte zu übertragen, so dass eine sichere Befestigung auf der Zentrifugenwelle möglich ist. Das Zentrifugengehäuse aus Kunststoff zeichnet sich durch ein geringes Gewicht aus, wodurch insbesondere auch geringere Zentrifugalkräfte in der Gehäusewand beim Rotieren des Ölabscheiders entstehen.The centrifugal oil separator according to the invention has a centrifuge housing made of plastic, into which a metal bushing is integrated, which is pushed onto the centrifuge shaft. The centrifuge housing and the metal bush form a prefabricated unit that is to be pushed onto the shaft and connected to it. The metal bushing is able to transmit high holding forces so that it can be securely attached to the centrifuge shaft. The centrifuge housing made of plastic is characterized by a low weight, which in particular also results in lower centrifugal forces in the housing wall when the oil separator rotates.
Für eine erleichterte Montage kann die Metallbuchse mit einem geringen Spiel auf die Zentrifugenwelle aufgeschoben werden; während des Betriebs entstehende, auf das Spiel zurückzuführende Kräfte werden ohne weiteres von der Metallbuchse aufgenommen, das Zentrifugengehäuse wird von diesen Kräften entlastet, wodurch eine verbesserte Rotationsfähigkeit und längere Lebensdauer gewährleistet ist.To facilitate assembly, the metal bushing can be pushed onto the centrifuge shaft with little play; Forces resulting from operation due to the play are easily absorbed by the metal bushing, the centrifuge housing is relieved of these forces, which ensures improved rotatability and a longer service life.
In einer zweckmäßigen Weiterbildung ist vorgesehen, dass auch die Zentrifugenwelle als ein separates Bauteil ausgeführt ist, welches drehfest mit einer rotierenden Welle der Brennkraftmaschine - beispielsweise der Nockenwelle, der Kurbelwelle oder einer Ausgleichswelle - verbunden ist. In dieser Ausführung kann der Zentrifugal-Olabscheider mit der separaten Zentrifugenwelle eine vormontierte Baueinheit bilden, die vorgefertigt in die Brennkraftmaschine eingesetzt und mit dieser verbunden wird. Hierbei hat es sich als zweckmäßig erwiesen, den Olabscheider mit einem Kettenrad zu verbinden, wobei die Zentrifugenwelle in eine Ausnehmung im Kettenrad eingesetzt wird, insbesondere als Presspassung in die Ausnehmung eingeschoben wird. Zusätzliche Verbindungsmaßnahmen zwischen Olabscheider und der Welle können damit grundsätzlich entfallen.In an expedient development, it is provided that the centrifuge shaft is also designed as a separate component is which is rotatably connected to a rotating shaft of the internal combustion engine - for example the camshaft, the crankshaft or a balancer shaft. In this version, the centrifugal oil separator with the separate centrifuge shaft can form a preassembled unit which is prefabricated and inserted into the internal combustion engine and connected to it. Here, it has proven to be expedient to connect the oil separator to a sprocket, the centrifuge shaft being inserted into a recess in the sprocket, in particular being pushed into the recess as a press fit. Additional connection measures between the oil separator and the shaft can therefore in principle be dispensed with.
Zwischen einer Wandseite des Zentrifugengehäuses und dem Kettenrad kann ein Luftführungsraum insbesondere luft- und druckdicht eingeschlossen sein, welcher zum Ableiten der Reinluft nach dem Abscheiden des Öls dient. Der Luftführungsraum umschließt vorteilhaft ringförmig die Zentrifugenwelle, welche über Radialöffnungen mit dem Luftführungsraum kommuniziert, durch die die Reinluft radial nach innen in einen axial verlaufenden Strömungskanal in der Zentrifugenwelle entweichen kann. Über den axialen Strömungskanal kann die Reinluft aus dem Olabscheider abgeführt werden.Between a wall side of the centrifuge housing and the chain wheel, an air guiding space can be enclosed, in particular in an airtight and pressure-tight manner, which serves to discharge the clean air after the oil has been separated. The air guide space advantageously surrounds the centrifuge shaft in an annular manner, which communicates with the air guide space via radial openings through which the clean air can escape radially inward into an axially extending flow channel in the centrifuge shaft. The clean air can be removed from the oil separator via the axial flow channel.
Für eine feste Verbindung zwischen Metallbuchse und Zentrifugengehäuse kann es zweckmäßig sein, dass die Metallbuchse in das Schleuderrad eingespritzt ist.For a firm connection between the metal bushing and the centrifuge housing, it may be expedient for the metal bushing to be injected into the centrifugal wheel.
Zum axialen Sichern der Metallbuchse gegen ein unbeabsichtigtes Lösen von der Zentrifugenwelle kann ein Sicherungsring auf der Welle befestigt sein. Gegebenenfalls kommt aber auch eine Nutmutter in Betracht, die auf die Metallbuchse aufgeschraubt wird. Weitere Vorteile und zweckmäßige Ausführungen sind den weiteren Ansprüchen, der Figurenbeschreibung und den Zeichnungen zu entnehmen. Es zeigen:To axially secure the metal bush against unintentional detachment from the centrifuge shaft, a locking ring can be attached to the shaft. If necessary, a locknut can also be used, which is screwed onto the metal bushing. Further advantages and expedient designs can be found in the further claims, the description of the figures and the drawings. Show it:
Fig. 1 einen Schnitt durch einen Zentrifugal -Olabscheider im Kurbelgehäuse einer Brennkraftmaschine, der auf ein Kettenrad aufgesetzt ist, welches drehfest mit einer Nockenwelle verbunden ist,1 shows a section through a centrifugal oil separator in the crankcase of an internal combustion engine, which is placed on a chain wheel which is connected to a camshaft in a rotationally fixed manner,
Fig. 2 eine Fig. 1 entsprechende Darstellung eines Ölab- scheiders, jedoch in einer modifizierten Ausführung.FIG. 2 shows an illustration of an oil separator corresponding to FIG. 1, but in a modified version.
In den folgenden Figuren sind gleiche Bauteile mit gleichen Bezugszeichen versehen.In the following figures, the same components are provided with the same reference symbols.
Der in Fig. 1 dargestellte Zentrifugal-Olabscheider 1 ist drehfest mit einer Nockenwelle 2 einer Brennkraftmaschine verbunden und sitzt an einer Stirnseite eines Kettenrades 3 auf, welches stirnseitig an die Nockenwelle 2 angeflanscht und fest mit dieser gekoppelt ist. Der Olabscheider 1 umfasst ein Zentrifugengehäuse 4, welches aus Kunststoff gefertigt ist, sowie eine Metallbuchse 5, die in das Zentrifugengehäuse 4 integriert ist und die Nabe des Zentrifugengehäuses bildet. Des Weiteren umfasst der Olabscheider 1 eine Zentrifugenwelle 6, auf die die Metallbuchse 5 aufgeschoben ist.The centrifugal oil separator 1 shown in FIG. 1 is non-rotatably connected to a camshaft 2 of an internal combustion engine and is seated on an end face of a chain wheel 3 which is flanged to the end of the camshaft 2 and is firmly coupled to the latter. The oil separator 1 comprises a centrifuge housing 4, which is made of plastic, and a metal bushing 5, which is integrated in the centrifuge housing 4 and forms the hub of the centrifuge housing. Furthermore, the oil separator 1 comprises a centrifuge shaft 6, onto which the metal bushing 5 is pushed.
Die Metallbuchse 5 ist sowohl in Umfangsrichtung als auch a- xial gegen ein unbeabsichtigtes Lösen von der Zentrifugenwelle 6 gesichert. Zur axialen Sicherung ist ein Sicherungsring 8 vorgesehen, der in eine umlaufende Nut auf der Zentrifugenwelle 6 einsetzbar ist und dadurch seinerseits gegen axiales Verlieren gesichert ist. Die Mitnahme in Umfangsrichtung erfolgt über ein Formschlusselement 9, welches radial zwischen Zentrifugenwelle 6 und Metallbuchse 5 angeordnet ist. Die Zentrifugenwelle 6 ist als ein separates, von der Nockenwelle 2 unabhängiges Bauteil ausgeführt. Zur Verbindung zwischen Olabscheider 1 und Nockenwelle 2 ist die Zentrifugenwelle 6 in eine axiale Ausnehmung im Kettenrad 3 eingeschoben, insbesondere unter Druck eingeschoben, wobei gegebenenfalls auch zusätzliche oder alternative Befestigungsmaßnahmen in Betracht kommen.The metal bushing 5 is secured both in the circumferential direction and axially against inadvertent detachment from the centrifuge shaft 6. For axial securing, a securing ring 8 is provided, which can be inserted into a circumferential groove on the centrifuge shaft 6 and is thereby secured against axial loss. The entrainment in the circumferential direction takes place via a form-locking element 9, which is arranged radially between the centrifuge shaft 6 and the metal bush 5. The centrifuge shaft 6 is designed as a separate component that is independent of the camshaft 2. For the connection between the oil separator 1 and the camshaft 2, the centrifuge shaft 6 is pushed into an axial recess in the chain wheel 3, in particular pushed under pressure, additional or alternative fastening measures also possibly being considered.
Auf der dem Kettenrad 3 abgewandten Seite weist der Olabscheider 1 einen Ölabscheiderdeckel 7 auf, welcher ebenfalls auf der Zentrifugenwelle 6 aufsitzt. Der Ölabscheiderdeckel 7 bildet ebenfalls einen Bestandteil des Olabscheiders 1 und kann ebenso wie das Zentrifugengehäuse 4, die Metallbuchse 5 und die Zentrifugenwelle 6 zu einer vorgefertigten Einheit montiert werden.On the side facing away from the sprocket 3, the oil separator 1 has an oil separator cover 7, which is also seated on the centrifuge shaft 6. The oil separator cover 7 also forms part of the oil separator 1 and, like the centrifuge housing 4, the metal bushing 5 and the centrifuge shaft 6, can be assembled to form a prefabricated unit.
Im Zentrifugengehäuse 4 ist ein Abscheideraum 10 ausgebildet, welcher ringförmig um die Metallbuchse 5 umläuft und in dem das radial gemäß Pfeil 11 in das Gehäuse einströmende Luft- Öl-Gemisch in seine Bestandteile Öl und Luft separiert wird. Die Einströmung des Luft-Öl-Gemisches erfolgt über einen radialen Zuströmkanal 12, welcher zwischen einer Stirnseite des Zentrifugengehäuses 4 und des Ölabscheiderdeckels 7 ausgebildet ist. Über eine axiale Ringöffnung strömt das Gemisch in den Abscheideraum 10 ein, in welchem sich Schikanen 13 befinden können, die das Abscheiden des Öls unterstützen sollen. Das abgeschiedene Öl wird radial gemäß Pfeil 14 durch Abströmöffnungen 15 in der Umfangswand des Zentrifugengehäuses 4 abgeleitet.In the centrifuge housing 4, a separating space 10 is formed, which rotates in a ring around the metal bushing 5 and in which the air-oil mixture flowing radially into the housing according to arrow 11 is separated into its components oil and air. The inflow of the air-oil mixture takes place via a radial inflow channel 12 which is formed between an end face of the centrifuge housing 4 and the oil separator cover 7. The mixture flows through an axial ring opening into the separating space 10, in which baffles 13 can be located, which are intended to assist the separation of the oil. The separated oil is drained radially according to arrow 14 through outflow openings 15 in the peripheral wall of the centrifuge housing 4.
Die Reinluft verlässt den Abscheideraum 10 über axiale Abströmöffnungen 16 in einer dem Kettenrad 3 zugewandten Seitenwand des Zentrifugengehäuses 4 und strömt zunächst in einen ringförmigen Luftführungsraum 18, welcher sich in einer stirnseitigen Ausnehmung des Kettenrades 3 befindet und axial von einer Wandseite des Zentrifugengehäuses 4 und radial nach innen von der Zentrifugenwelle 6 begrenzt wird. Der Luftfüh- rungsraum 18 ist insbesondere luft- und druckdicht gegenüber der Umgebung abgedichtet. Zur Unterstützung der Abdichtung ist ein Dichtring 19 zwischen Zentrifugengehäuse 4 und Kettenrad 3 vorgesehen.The clean air leaves the separating space 10 via axial outflow openings 16 in a side wall of the centrifuge housing 4 facing the chain wheel 3 and initially flows into an annular air guide space 18 which is located in a End recess of the sprocket 3 is located and is axially delimited by a wall side of the centrifuge housing 4 and radially inwards by the centrifuge shaft 6. The air guide space 18 is in particular sealed airtight and pressure-tight from the surroundings. To support the seal, a sealing ring 19 is provided between the centrifuge housing 4 and the chain wheel 3.
Der die Zentrifugenwelle 6 ringförmig umschließende Luftführungsraum 18 kommuniziert über Radialbohrungen 20 in der Wandung der Zentrifugenwelle 6 mit einem axial verlaufenden Strömungskanal 21 im Inneren der Zentrifugenwelle. Die Reinluft wird aus dem Luftführungsraum 18 in Pfeilrichtung 17 zu den Radialbohrungen 20 und weiter durch diese radial nach innen geführt und axial über den Strömungskanal 21 in Pfeil- richtung 22 aus dem Olabscheider 1 abgeleitet .The air guide space 18, which surrounds the centrifuge shaft 6 in an annular manner, communicates via radial bores 20 in the wall of the centrifuge shaft 6 with an axially extending flow channel 21 in the interior of the centrifuge shaft. The clean air is guided from the air guide space 18 in the arrow direction 17 to the radial bores 20 and further through these radially inwards and is discharged axially via the flow channel 21 in the arrow direction 22 from the oil separator 1.
Der Aufbau des Olabscheiders 1 gemäß Fig. 2 entspricht im Grundsatz demjenigen des vorherigen Ausführungsbeispieles, jedoch mit dem Unterschied, dass zur axialen Sicherung von Metallbuchse 5 und Zentrifugengehäuse 4 auf der Zentrifugenwelle 6 eine Nutmutter 23 auf die Welle 6 aufgeschraubt wird. The structure of the oil separator 1 according to FIG. 2 corresponds in principle to that of the previous exemplary embodiment, but with the difference that a lock nut 23 is screwed onto the shaft 6 on the centrifuge shaft 6 for axially securing the metal bushing 5 and the centrifuge housing 4.

Claims

Patentansprüche claims
1. Zentrifugal-Olabscheider in einem Kurbelgehäuse einer Brennkraftmaschine, mit einem auf eine rotierende Zentrifugenwelle (6) drehfest aufgesetzten Zentrifugengehäuse (4) , d a d u r c h g e k e n n z e i c h n e t , dass das Zentrifugengehäuse (4) aus Kunststoff gefertigt und in das Zentrifugengehäuse (4) eine Metallbuchse (5) integriert ist, die auf die Zentrifugenwelle (6) aufgeschoben ist.1. Centrifugal oil separator in a crankcase of an internal combustion engine, with a centrifuge housing (4) rotatably mounted on a rotating centrifuge shaft (6), characterized in that the centrifuge housing (4) is made of plastic and a metal bushing (5) in the centrifuge housing (4) is integrated, which is pushed onto the centrifuge shaft (6).
2. Zentrifugal-Ölabscheider nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , dass die Zentrifugenwelle (6) als separates Bauteil ausgeführt ist, das drehfest mit einer rotierenden Welle (2) " der Brennkraftmaschine verbunden ist .2. Centrifugal oil separator according to claim 1, characterized in that the centrifuge shaft (6) is designed as a separate component which is rotatably connected to a rotating shaft (2) "of the internal combustion engine.
3. Zentrifugal-Ölabscheider nach Anspruch 2, d a d u r c h g e k e n n z e i c h n e t , dass das Zentrifugengehäuse (4) axial an ein Kettenrad (3) angrenzt, welches mit der Welle (2) umläuft.3. Centrifugal oil separator according to claim 2, d a d u r c h g e k e n n z e i c h n e t that the centrifuge housing (4) axially adjoins a sprocket (3) which rotates with the shaft (2).
4. Zentrifugal-Ölabscheider nach Anspruch 3, d a d u r c h g e k e n n z e i c h n e t , dass zwischen einer Wandseite des Zentrifugengehäuses (4) und dem Kettenrad (3) ein Luftführungsraum (18) für die Ableitung von Reinluft gebildet ist. 4. Centrifugal oil separator according to claim 3, characterized in that between one wall side of the centrifuge housing (4) and the chain wheel (3) an air guide space (18) is formed for the discharge of clean air.
5. Zentrifugal-Ölabscheider nach Anspruch 2 und 3, d a d u r c h g e k e n n z e i c h n e t , dass die Zentrifugenwelle (6) in eine Ausnehmung im Kettenrad (3) eingesetzt ist.5. Centrifugal oil separator according to claim 2 and 3, so that the centrifuge shaft (6) is inserted into a recess in the chain wheel (3).
6. Zentrifugal-Ölabscheider nach einem der Ansprüche 1 bis 5, d a d u r c h g e k e n n z e i c h n e t , dass die Zentrifugenwelle (6) Radialbohrungen (20) zur Ableitung von Reinluft aufweist.6. Centrifugal oil separator according to one of claims 1 to 5, that the centrifuge shaft (6) has radial bores (20) for discharging clean air.
7. Zentrifugal-Ölabscheider nach einem der Ansprüche 1 bis 6, d a d u r c h g e k e n n z e i c h n e t , dass die Zentrifugenwelle (6) einen axialen Strömungskanal (21) zur Ableitung von Reinluft aufweist.7. Centrifugal oil separator according to one of claims 1 to 6, that the centrifuge shaft (6) has an axial flow channel (21) for discharging clean air.
8. Zentrifugal-Ölabscheider nach einem der Ansprüche 1 bis 7, d a d u r c h g e k e n n z e i c h n e t , dass die Metallbuchse (5) in das Zentrifugengehäuse (4) eingespritzt ist.8. Centrifugal oil separator according to one of claims 1 to 7, that the metal bushing (5) is injected into the centrifuge housing (4).
9. Zentrifugal-Ölabscheider nach einem der Ansprüche 1 bis 8, d a d u r c h g e k e n n z e i c h n e t , dass ein Sicherungsring (8) zum axialen Sichern der Metall- buchse (5) auf der Zentrifugenwelle (6) aufsitzt.9. Centrifugal oil separator according to one of claims 1 to 8, d a d u r c h g e k e n e z e i c h n e t that a locking ring (8) for axially securing the metal bushing (5) on the centrifuge shaft (6).
10. Zentrifugal-Ölabscheider nach einem der Ansprüche 1 bis10. Centrifugal oil separator according to one of claims 1 to
9, d a d u r c h g e k e n n z e i c h n e t , dass eine Nutmutter (23) zum axialen Sichern auf die Zentrifugenwelle (6) aufgeschraubt ist. 9, that a grooved nut (23) is screwed onto the centrifuge shaft (6) for axial locking.
EP03722543A 2002-06-15 2003-04-25 Centrifugal oil separator for use in the crankcase of an internal combustion engine Expired - Lifetime EP1514012B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10226695 2002-06-15
DE10226695A DE10226695A1 (en) 2002-06-15 2002-06-15 Centrifugal oil separator in a crankcase of an internal combustion engine
PCT/EP2003/004308 WO2003106821A1 (en) 2002-06-15 2003-04-25 Centrifugal oil separator for use in the crankcase of an internal combustion engine

Publications (2)

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EP1514012A1 true EP1514012A1 (en) 2005-03-16
EP1514012B1 EP1514012B1 (en) 2006-02-01

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EP03722543A Expired - Lifetime EP1514012B1 (en) 2002-06-15 2003-04-25 Centrifugal oil separator for use in the crankcase of an internal combustion engine

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US (1) US7309308B2 (en)
EP (1) EP1514012B1 (en)
JP (1) JP4048297B2 (en)
DE (2) DE10226695A1 (en)
WO (1) WO2003106821A1 (en)

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Also Published As

Publication number Publication date
JP4048297B2 (en) 2008-02-20
EP1514012B1 (en) 2006-02-01
DE50302341D1 (en) 2006-04-13
US7309308B2 (en) 2007-12-18
WO2003106821A1 (en) 2003-12-24
JP2005533954A (en) 2005-11-10
DE10226695A1 (en) 2003-12-24
US20050121262A1 (en) 2005-06-09

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