EP1080298B1 - Oil separator for removing oil from the crankcase ventilation gases of an internal combustion engine - Google Patents

Oil separator for removing oil from the crankcase ventilation gases of an internal combustion engine Download PDF

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Publication number
EP1080298B1
EP1080298B1 EP00916937A EP00916937A EP1080298B1 EP 1080298 B1 EP1080298 B1 EP 1080298B1 EP 00916937 A EP00916937 A EP 00916937A EP 00916937 A EP00916937 A EP 00916937A EP 1080298 B1 EP1080298 B1 EP 1080298B1
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EP
European Patent Office
Prior art keywords
oil separator
combustion engine
oil
cyclones
separator according
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Expired - Lifetime
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EP00916937A
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German (de)
French (fr)
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EP1080298A1 (en
EP1080298B2 (en
Inventor
Jürgen BUSEN
Sieghard Pietschner
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Hengst SE and Co KG
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Ing Walter Hengst GmbH and Co KG
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Application filed by Ing Walter Hengst GmbH and Co KG filed Critical Ing Walter Hengst GmbH and Co KG
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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
    • F01M2013/0038—Layout of crankcase breathing systems
    • F01M2013/005—Layout of crankcase breathing systems having one or more deoilers
    • F01M2013/0061—Layout of crankcase breathing systems having one or more deoilers having a plurality of deoilers
    • F01M2013/0066—Layout of crankcase breathing systems having one or more deoilers having a plurality of deoilers in parallel
    • 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
    • F01M2013/0427—Separating oil and gas with a centrifuge device the centrifuge device having no rotating part, e.g. cyclone

Definitions

  • the present invention relates to an oil separator for de-oiling crankcase ventilation qases one Internal combustion engine, the oil separator being a cyclone comprises one with the crankcase of the internal combustion engine connected gas inlet, one with the intake tract the internal combustion engine connected gas outlet and one connected to an oil sump of the internal combustion engine Has oil outlet.
  • An oil separator of the type mentioned above is from the DE 42 14 324 C2 known. With this oil separator a single cyclone is used, which regarding its Size is such that it is the maximum amount of ventilation gases can process. As essential Feature is provided in this known oil separator that a down pipe at the oil outlet of the cyclone connects, whose mouth below the oil level of the Oil sump of the associated internal combustion engine arranged is that in a lower cyclone-side housing part housed, normally open float valve one Kickback from the oil sump of the internal combustion engine is prevented and that the entire oil separator as an assembly is separably connected to the downpipe.
  • an oil separator of the type mentioned to create which avoids the disadvantages listed and especially about a very large one, all in the Operating conditions of the internal combustion engine that occur in practice comprehensive work area an optimal, i.e. complete or almost complete separation of oil guaranteed from the crankcase ventilation gases.
  • the oil separator according to the invention is compared essential to an oil separator with a single cyclone Enlargement of the optimal working area of the Oil separator reached.
  • the oil separator shows a significantly improved separation performance with low Volume flows of the crankcase ventilation gases as well as greater insensitivity to fluctuations this volume flow.
  • the invention Oil separator a significantly reduced dependency the separation performance and thus the efficiency of the current operating conditions the associated internal combustion engine achieves what the oil pollution of the intake air of the internal combustion engine is essential reduced and what the oil loss of the internal combustion engine reduced via the crankcase ventilation.
  • cyclones with a tangential flow are executed.
  • This tangential Inflow enables a particular compact design compared to an axial Inflow keeps the height of the cyclones low.
  • Another embodiment of the invention provides that the bodies of the individual cyclones are parallel to each other Have central axes and a cyclone body component are united. Because every single cyclone only another fraction corresponding to the number of cyclones the crankcase ventilation gases must process, can each cyclone is correspondingly smaller, especially with a smaller one Diameter and, more importantly, with accordingly reduced height. Thereby the overall size of the oil separator is advantageous compact, although in comparison to a conventional Oil separator the diameter slightly larger can become, but the overall height is significantly smaller. This offers a significant relief in terms of accommodation the oil separator in an engine compartment, e.g. of a motor vehicle, where space is often limited be found.
  • the main inflow channel and the individual inflow channels to form an inflow channel component united.
  • Another step to reduce the parts of the Oil separator is that the cyclone body component and the inflow channel component to a main component are united.
  • the individual cyclones of the oil separator summarized as a bundle in a compact component be arranged; alternatively offers the execution of the oil separator with several individual cyclones the advantageous possibility that the individual cyclones decentrally in and / or on the internal combustion engine are arranged. So here the possibility is created the individual cyclones separately to accommodate such places in or on the internal combustion engine, where just room for a single cyclone is. This can often result in small dead spaces that previously could not be used makes sense each for a cyclone that is relatively small in itself is used.
  • the individual cyclones and / or the associated Inlets and outlets at least partially in one or several other components of the internal combustion engine be integrated.
  • the effort for production and the installation of the individual parts of the oil separator and / or its feed and discharge lines reduced become.
  • the installation space required for the individual parts of the oil separator and for its inlets and outlets can be reduced further.
  • the individual cyclones and / or the associated supply and discharge lines or parts thereof are particularly suitable as components of the internal combustion engine their cylinder head cover or their air filter housing.
  • the components mentioned offer on the one hand Open spaces or previous dead spaces in which the cyclones as well as other parts of the oil separator without additional space can be accommodated.
  • these are Components anyway in the vicinity or along the flow paths, which the crankcase ventilation gas as well Put the oil and the cleaned gas out of it have to.
  • the individual parts are preferred Die-cast parts made of light metal and / or injection molded parts made of plastic.
  • a main inflow channel 20 can be seen at the top right in FIG. 1, its outer, i.e. right end as a transition piece 28 with a line connecting piece 29, which in Cross section is circular, is formed. From the right seen to the left, i.e. in the direction of flow crankcase ventilation gas to be conducted through the oil separator 1, the inflow channel 20 becomes flatter and what is not visible in Figure 1, at the same time wider, whereby whose cross-sectional area is essentially constant remains.
  • the inflow channel 20 is divided into four individual Inflow channels or gas inlets 21 - 24, of which in Figure 1 only the channel or inlet 22 to the second cyclone 12 is visible. In this way the incoming gas flow distributed to the four cyclones 11-14, each a tangential flow occurs.
  • the oil separated in the cyclones 11-14 flows inside of cyclones 11-14 down and occurs at their lower end through an oil outlet 41 - 44 into one Collection funnel 48.
  • An oil outlet 41 - 44 into one Collection funnel 48.
  • At the center of the collection funnel 48 is at its lowest point a pipe connection piece 49 provided to which an oil return line to an oil sump of the associated internal combustion engine can be connected.
  • For the two cyclones 11 and 12 is the Course so that there is a right-handed gas flow, while with cyclones 13 and 14 the gas flow is done by turning to the left.
  • Inside each cyclone 11 - 14 the view falls through the corresponding one Gas outlet 31 - 34 on the bottom of the cyclone 11 - 14 arranged oil outlet 41 - 44.
  • At the bottom is in the background in Figure 2 is still a small part of the Collecting funnel 48 recognizable for the separated oil.
  • Figure 2 in particular shows that the incoming Gas flow without redirection and thus practically without increase the flow resistance to the four individual Cyclones 11-14 is distributed.
  • the gas flow to several cyclones results in an improved Oil separation, especially for smaller ones Quantities of vent gases, at the same time lower Sensitivity to fluctuations in the volume flow of the crankcase ventilation gas.
  • this can be made from a few individual parts, in the present Example from the main component 10, the transition piece 28, the combined gas outlets 31 - 34, the collecting hood 38 and the collecting funnel 48 manufacture.
  • connecting lines which are advantageously carried out as hoses are, as is known per se. alternative can individual or all connecting lines, at least over sections, into other components of the internal combustion engine be integrated in what the manufacturing and assembly separate lines reduced or even completely unnecessary makes.
  • the specified parts of the oil separator 1 are useful die-cast parts made of light metal or Injection molded plastic, one plastic too is to choose the thermal and chemical occurring Stress has grown.

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

Description

Die vorliegende Erfindung betrifft einen Ölabscheider zur Entölunq von Kurbelqehäuse-Entlüftunqsqasen einer Brennkraftmaschine, wobei der Ölabscheider einen Zyklon umfaßt, der einen mit dem Kurbelgehäuse der Brennkraftmaschine verbundenen Gaseinlaß, einen mit dem Ansaugtrakt der Brennkraftmaschine verbundenen Gasauslaß und einen mit einem Ölsumpf der Brennkraftmaschine verbundenen Ölauslaß aufweist.The present invention relates to an oil separator for de-oiling crankcase ventilation qases one Internal combustion engine, the oil separator being a cyclone comprises one with the crankcase of the internal combustion engine connected gas inlet, one with the intake tract the internal combustion engine connected gas outlet and one connected to an oil sump of the internal combustion engine Has oil outlet.

Ein Ölabscheider der oben genannten Art ist aus der DE 42 14 324 C2 bekannt. Bei diesem Ölabscheider wird ein einzelner Zyklon eingesetzt, der hinsichtlich seiner Größe so bemessen ist, daß er die maximal anfallende Menqe von Entlüftungsgasen verarbeiten kann. Als wesentliches Merkmal ist bei diesem bekannten Ölabscheider vorgesehen, daß an dem Ölauslaß des Zyklons eine Falleitung anschließt, deren Mündung unterhalb des Ölspiegels des Ölsumpfes der zugehörigen Brennkraftmaschine angeordnet ist, daß ein in einem unteren zyklonseitigen Gehäuseteil untergebrachtes, normal offenes Schwimmerventil einen Rückschlag aus dem Ölsumpf des Verbrennungsmotors verhindert und daß der gesamte Ölabscheider als Baugruppe mit der Falleitung trennbar verbunden ist. Diese speziellen Merkmale des Ölabscheiders sollen dafür sorgen, daß bei plötzlichen und starken Änderungen der Betriebsbedingungen der zugehörigen Brennkraftmaschine, beispielsweise wenn aus dem Leerlauf heraus Vollgas gegeben wird, kein Öl aus dem Ölsumpf der Brennkraftmaschine in das Innere des Zyklons gerissen wird, weil durch die Änderung der Betriebsbedingungen extrem große Druckdifferenzen auftreten.An oil separator of the type mentioned above is from the DE 42 14 324 C2 known. With this oil separator a single cyclone is used, which regarding its Size is such that it is the maximum amount of ventilation gases can process. As essential Feature is provided in this known oil separator that a down pipe at the oil outlet of the cyclone connects, whose mouth below the oil level of the Oil sump of the associated internal combustion engine arranged is that in a lower cyclone-side housing part housed, normally open float valve one Kickback from the oil sump of the internal combustion engine is prevented and that the entire oil separator as an assembly is separably connected to the downpipe. These special Features of the oil separator should ensure that in the event of sudden and severe changes in operating conditions the associated internal combustion engine, for example when full throttle is reached from idle, no oil from the oil sump of the internal combustion engine in the Inside of the cyclone is torn because of the change operating conditions extremely large pressure differences occur.

Das dargelegte Problem, mit dem sich die oben genannte Schrift beschäftigt, wird zwar durch den darin beschriebenen Ölabscheider gelöst, jedoch weist dieser Ölabscheider mit dem einzelnen Zyklon den Nachteil auf, daß er nicht über den gesamten in der Praxis auftretenden Bereich von Betriebsbedingungen der Brennkraftmaschine ein optimales Ölabscheideergebnis erreicht. Die auftretenden unterschiedlichen Betriebsbedingungen der Brennkraftmaschine führen einerseits zu unterschiedlich großen Volumenströmen von Entlüftungsgasen aus dem Kurbelgehäuse und zum anderen zu einer unterschiedlich starken Ölbefrachtunq dieser Entlüftungsgase. Da ein Zyklon nur für einen bestimmten, relativ engen Bereich von Betriebsbedinqunqen der Brennkraftmaschine optimal arbeitet, treten bei Betriebsbedingungen außerhalb dieses optimalen Arbeitsbereiches doch noch nicht erwünschte Ölmengen in den aus dem Zyklon abgeführten, der Ansaugluft der Brennkraftmaschine zugeleiteten Gasen auf.The problem outlined that addresses the above Scripture is employed by the one described therein Oil separator released, but this oil separator has with the single cyclone the disadvantage that he not over the entire area occurring in practice of operating conditions of the internal combustion engine optimal oil separation result achieved. The occurring different operating conditions of the internal combustion engine on the one hand lead to volume flows of different sizes of ventilation gases from the crankcase and on the other hand to a different level of oil freight these vent gases. Because a cyclone is only for a certain, relatively narrow range of operating conditions the internal combustion engine works optimally in operating conditions outside of this optimal Amount of oil not yet desired in the intake air of the internal combustion engine discharged from the cyclone supplied gases.

Für die vorliegende Erfindung stellt sich deshalb die Aufgabe, einen Ölabscheider der eingangs genannten Art zu schaffen, der die aufgeführten Nachteile vermeidet und der insbesondere über einen sehr großen, alle in der Praxis auftretenden Betriebsbedingungen der Brennkraftmaschine umfassenden Arbeitsbereich eine optimale, d.h. vollständige oder nahezu vollständige Abscheidung von Öl aus den Kurbelgehäuse-Entlüftungsgasen gewährleistet. Therefore, for the present invention Task, an oil separator of the type mentioned to create, which avoids the disadvantages listed and especially about a very large one, all in the Operating conditions of the internal combustion engine that occur in practice comprehensive work area an optimal, i.e. complete or almost complete separation of oil guaranteed from the crankcase ventilation gases.

Die Lösung dieser Aufgabe gelingt durch einen Ölabscheider der eingangs genannten Art, der dadurch gekennzeichnet ist, daß anstelle eines einzelnen Zyklons mehrere parallelgeschaltete kleinere Zyklone vorgesehen sind.This task is solved by an oil separator of the type mentioned, characterized in that is that instead of a single cyclone, several smaller cyclones connected in parallel are provided.

Mit dem erfindungsgemäßen Ölabscheider wird im Vergleich zu einem Ölabscheider mit einem einzelnen Zyklon eine wesentliche Vergrößerung des optimalen Arbeitsbereichs des Ölabscheiders erreicht. Insbesondere zeigt der Ölabscheider eine deutlich verbesserte Abscheideleistung bei geringen Volumenströmen der Kurbelgehäuse-Entlüftungsgase sowie eine größere Unempfindlichkeit gegen Schwankungen dieses Volumenstroms. Auf diese Weise wird mit dem erfindungsgemäßen Ölabscheider eine deutlich verminderte Abhängigkeit der Abscheideleistung und damit des Wirkungsgrades von den jeweils gerade vorliegenden Betriebsbedingungen der zugehörigen Brennkraftmaschine erreicht, was die Ölbelastung der Ansaugluft der Brennkraftmaschine wesentlich verringert und was den Ölverlust der Brennkraftmaschine über die Kurbelgehäuseentlüftung reduziert.With the oil separator according to the invention is compared essential to an oil separator with a single cyclone Enlargement of the optimal working area of the Oil separator reached. In particular, the oil separator shows a significantly improved separation performance with low Volume flows of the crankcase ventilation gases as well as greater insensitivity to fluctuations this volume flow. In this way, the invention Oil separator a significantly reduced dependency the separation performance and thus the efficiency of the current operating conditions the associated internal combustion engine achieves what the oil pollution of the intake air of the internal combustion engine is essential reduced and what the oil loss of the internal combustion engine reduced via the crankcase ventilation.

Bevorzugt ist weiter vorgesehen, daß die Zyklone mit einer tangentialen Anströmung ausgeführt sind. Diese tangentiale Anströmung ermöglicht insbesondere eine besonders kompakte Bauweise, die im Vergleich zu einer axialen Anströmung die Bauhöhe der Zyklone niedrig hält.It is preferably further provided that the cyclones with a tangential flow are executed. This tangential Inflow enables a particular compact design compared to an axial Inflow keeps the height of the cyclones low.

Eine weitere Ausgestaltung der Erfindung sieht vor, daß die Körper der einzelnen Zyklone parallel zueinander verlaufende Mittelachsen aufweisen und zu einem Zyklonkörper-Bauteil vereinigt sind. Da jeder einzelne Zyklon nur noch einen der Zahl der Zyklone entsprechenden Bruchteil der Kurbelgehäuse-Entlüftungsgase verarbeiten muß, kann jeder Zyklon entsprechend kleiner, insbesondere mit kleinerem Durchmesser und, was noch wichtiger ist, mit entsprechend verkleinerter Höhe ausgeführt werden. Dadurch wird die Baugröße des Ölabscheiders insgesamt vorteilhaft kompakt, wobei zwar im Vergleich zu einem herkömmlichen Ölabscheider der Durchmesser geringfügig größer werden kann, die Bauhöhe aber erheblich kleiner wird. Dies bietet eine wesentliche Erleichterung bei der Unterbringung des Ölabscheiders in einem Motorraum, z.B. eines Kraftfahrzeuges, wo häufig beengte Verhältnisse vorgefunden werden.Another embodiment of the invention provides that the bodies of the individual cyclones are parallel to each other Have central axes and a cyclone body component are united. Because every single cyclone only another fraction corresponding to the number of cyclones the crankcase ventilation gases must process, can each cyclone is correspondingly smaller, especially with a smaller one Diameter and, more importantly, with accordingly reduced height. Thereby the overall size of the oil separator is advantageous compact, although in comparison to a conventional Oil separator the diameter slightly larger can become, but the overall height is significantly smaller. This offers a significant relief in terms of accommodation the oil separator in an engine compartment, e.g. of a motor vehicle, where space is often limited be found.

Weiter ist vorgesehen, daß die zum jeweiligen Gaseinlaß der einzelnen Zyklone führenden Zuströmkanäle aus einem einzelnen, sich aufspaltenden oder aufteilenden Haupt-Zuströmkanal gebildet sind. Hierdurch wird mit Vorteil erreicht, daß nur eine einzelne Verbindungsleitung vom Kurbelgehäuse zum Ölabscheider geführt werden muß, um die Kurbelgehäuse-Entlüftungsgase zum Ölabscheider zu leiten. Erst im Ölabscheider folgt dann die Aufteilung des Gasstroms der Entlüftungsgase in die Teilströme für die einzelnen Zyklone. Dies vereinfacht den Einbau des Ölabscheiders und hält die Zahl der Verbindungsleitungen niedrig, obwohl mehrere Zyklone eingesetzt werden.It is also provided that the gas inlet of the individual cyclones leading inflow channels from one individual, splitting or dividing main inflow channel are formed. This will be an advantage achieved that only a single connecting line from Crankcase must be led to the oil separator in order the crankcase ventilation gases to the oil separator conduct. The division then follows only in the oil separator of the gas flow of the ventilation gases into the partial flows for the individual cyclones. This simplifies the installation of the Oil separator and keeps the number of connecting lines low even though multiple cyclones are used.

Um eine kostengünstige Fertigung des Ölabscheiders zu gewährleisten, sind zweckmäßig der Haupt-Zuströmkanal und die einzelnen Zuströmkanäle zu einem Zuströmkanal-Bauteil vereinigt.To ensure cost-effective production of the oil separator, are useful the main inflow channel and the individual inflow channels to form an inflow channel component united.

Ein weiterer Schritt zur Reduzierung der Einzelteile des Ölabscheiders besteht darin, daß das Zyklonkörper-Bauteil und das Zuströmkanal-Bauteil zu einem Haupt-Bauteil vereinigt sind.Another step to reduce the parts of the Oil separator is that the cyclone body component and the inflow channel component to a main component are united.

Wie oben erwähnt, können die einzelnen Zyklone des Ölabscheiders als Bündel in einem kompakten Bauteil zusammengefaßt angeordnet sein; alternativ bietet aber die Ausführung des Ölabscheiders mit mehreren einzelnen Zyklonen die vorteilhafte Möglichkeit, daß die einzelnen Zyklone dezentral in und/oder an der Brennkraftmaschine angeordnet sind. Es wird also hier die Möglichkeit geschaffen, die einzelnen Zyklone voneinander getrennt an solchen Orten in oder an der Brennkraftmaschine unterzubringen, wo gerade noch Raum für einen einzelnen Zyklon ist. Hierdurch können häufig noch vorhandene kleine Toträume, die bisher nicht genutzt werden konnten, sinnvoll jeweils für einen Zyklon, der für sich relativ klein ist, verwendet werden.As mentioned above, the individual cyclones of the oil separator summarized as a bundle in a compact component be arranged; alternatively offers the execution of the oil separator with several individual cyclones the advantageous possibility that the individual cyclones decentrally in and / or on the internal combustion engine are arranged. So here the possibility is created the individual cyclones separately to accommodate such places in or on the internal combustion engine, where just room for a single cyclone is. This can often result in small dead spaces that previously could not be used makes sense each for a cyclone that is relatively small in itself is used.

Ergänzend können die einzelnen Zyklone und/oder die zugehöriqen Zu- und Ableitungen zumindest zum Teil in eine oder mehrere andere Komponenten der Brennkraftmaschine integriert sein. Hierdurch kann der Aufwand für die Herstellung und den Einbau der einzelnen Teile des Ölabscheiders und/oder seiner Zu- und Ableitungen vermindert werden. Auch der Einbauraumbedarf für die einzelnen Teile des Ölabscheiders und für dessen Zu- und Ableitungen kann so weiter reduziert werden.In addition, the individual cyclones and / or the associated Inlets and outlets at least partially in one or several other components of the internal combustion engine be integrated. As a result, the effort for production and the installation of the individual parts of the oil separator and / or its feed and discharge lines reduced become. Also the installation space required for the individual parts of the oil separator and for its inlets and outlets can be reduced further.

Für die Integration der einzelnen Zyklone und/oder der zugehörigen Zu- und Ableitungen oder von Teilen davon sind besonders geeignet als Komponenten der Brennkraftmaschine deren Zylinderkopfhaube oder deren Luftfiltergehäuse. Die genannten Komponenten bieten einerseits Freiräume oder bisherige Toträume, in denen die Zyklone sowie weitere Teile des Ölabscheiders ohne Raum-Mehrbedarf untergebracht werden können. Außerdem liegen diese Komponenten ohnehin in der Nähe oder im Verlauf der Strömungswege, die das Kurbelgehäuse-Entlüftungsgas sowie das daraus abgeschiedene Öl und das gereinigte Gas zurücklegen müssen.For the integration of the individual cyclones and / or the associated supply and discharge lines or parts thereof are particularly suitable as components of the internal combustion engine their cylinder head cover or their air filter housing. The components mentioned offer on the one hand Open spaces or previous dead spaces in which the cyclones as well as other parts of the oil separator without additional space can be accommodated. In addition, these are Components anyway in the vicinity or along the flow paths, which the crankcase ventilation gas as well Put the oil and the cleaned gas out of it have to.

Um den Ölabscheider kostengünstig und arbeitssparend produzieren zu können, sind dessen Einzelteile bevorzugt Druckgußteile aus Leichtmetall und/oder Spritzgußteile aus Kunststoff.To produce the oil separator inexpensively and labor-saving To be able to, the individual parts are preferred Die-cast parts made of light metal and / or injection molded parts made of plastic.

Ein Ausführungsbeispiel der Erfindung wird im folgenden anhand einer Zeichnung erläutert. Die Figuren der Zeichnunq zeigen:

  • Figur 1 einen Ölabscheider im Vertikalschnitt und
  • Figur 2 den Ölabscheider aus Figur 1 im Horizontalschnitt gemäß der Linie II - II in Figur 1.
    • An embodiment of the invention is explained below with reference to a drawing. The figures in the drawing show:
  • Figure 1 shows an oil separator in vertical section and
  • 2 shows the oil separator from FIG. 1 in a horizontal section along the line II-II in FIG. 1.

    • Die beiden Figuren der Zeichnung zeigen ein Ausführungsbeispiel für einen Ölabscheider 1, der vier Zyklone 11, 12, 13, 14 umfaßt. Die Zyklone 11 - 14 sind zu einem einteiligen kompakten Haupt-Bauteil 10 zusammengefaßt.The two figures of the drawing show an embodiment for an oil separator 1, the four cyclones 11, 12, 13, 14 includes. Cyclones 11-14 are one one-piece compact main component 10 summarized.

    In dem in Figur 1 gezeigten Vertikalschnitt durch den Ölabscheider ist der Zyklon 11 in Ansicht und der Zyklon 12 im Vertikalschnitt erkennbar, wobei die zugehörige Schnittlinie I - I entsprechend der Figur 2 abgewinkelt verläuft. Die Zyklone 13 und 14 sind in der Figur 1 nicht sichtbar, weil sie vor der Schnittebene liegen.In the vertical section shown in Figure 1 through the Oil separator is the cyclone 11 in view and the cyclone 12 recognizable in vertical section, the associated Section line I - I angled according to Figure 2 runs. The cyclones 13 and 14 are in FIG. 1 not visible because they are in front of the cutting plane.

    Rechts oben in Figur 1 ist ein Haupt-Zuströmkanal 20 erkennbar, dessen äußeres, d.h. rechtes Ende als Übergangsstück 28 mit einem Leitungsanschlußstutzen 29, der im Querschnitt kreisrund ist, ausgebildet ist. Von rechts nach links gesehen, d.h. in Strömungsrichtung eines durch den Ölabscheider 1 zu leitenden Kurbelgehäuse-Entlüftungsgases, wird der Zuströmkanal 20 flacher und, was in Figur 1 nicht sichtbar ist, zugleich breiter, wobei dessen Querschnittsfläche im wesentlichen konstant bleibt. Der Zuströmkanal 20 teilt sich in vier einzelne Zuströmkanäle oder Gaseinlässe 21 - 24 auf, von denen in Figur 1 nur der Kanal oder Einlaß 22 zum zweiten Zyklon 12 sichtbar ist. Auf diese Weise wird der ankommende Gasstrom auf die vier Zyklone 11 - 14 verteilt, wobei jeweils eine tangentiale Anströmung erfolgt. Durch diese tangentiale Anströmung wird der Gasstrom in eine Wirbelströmung versetzt, die dafür sorgt, daß mitgeführte Öltröpfchen sich an der inneren Oberfläche der Zyklone 11 - 14 niederschlagen und von dort nach unten fließen. Die von den Öltröpfchen befreite Gasströmung tritt aus jedem Zyklon 11 - 14 durch je einen zugehörigen Gasauslaß 31 - 34 nach oben aus und gelangt durch eine Sammelhaube 38 in einen Leitungsanschlußstutzen 39. An diesen Anschlußstutzen 39 ist eine Gasleitung anschließbar, die zu einem Luftansaugtrakt einer zugehörigen Brennkraftmaschine führt.A main inflow channel 20 can be seen at the top right in FIG. 1, its outer, i.e. right end as a transition piece 28 with a line connecting piece 29, which in Cross section is circular, is formed. From the right seen to the left, i.e. in the direction of flow crankcase ventilation gas to be conducted through the oil separator 1, the inflow channel 20 becomes flatter and what is not visible in Figure 1, at the same time wider, whereby whose cross-sectional area is essentially constant remains. The inflow channel 20 is divided into four individual Inflow channels or gas inlets 21 - 24, of which in Figure 1 only the channel or inlet 22 to the second cyclone 12 is visible. In this way the incoming gas flow distributed to the four cyclones 11-14, each a tangential flow occurs. Through this Tangential inflow turns the gas flow into a vortex flow offset, which ensures that entrained oil droplets on the inner surface of the cyclones 11 - knock down 14 and flow down from there. The Gas flow freed from the oil droplets emerges from everyone Cyclone 11 - 14 through an associated gas outlet 31 - 34 upwards and passes through a collecting hood 38 into a line connection piece 39. At this connection piece 39, a gas line can be connected, which leads to a Air intake tract of an associated internal combustion engine leads.

    Das in den Zyklonen 11 - 14 abgeschiedene Öl fließt innerhalb der Zyklone 11 - 14 nach unten und tritt an deren unterem Ende durch je einen Ölauslaß 41 - 44 in einen Sammeltrichter 48 aus. Im Zentrum des Sammeltrichters 48 ist an dessen tiefster Stelle ein Leitungsanschlußstutzen 49 vorgesehen, an den eine Ölrückführleitung zu einem Ölsumpf der zugehörigen Brennkraftmaschine anschließbar ist.The oil separated in the cyclones 11-14 flows inside of cyclones 11-14 down and occurs at their lower end through an oil outlet 41 - 44 into one Collection funnel 48. At the center of the collection funnel 48 is at its lowest point a pipe connection piece 49 provided to which an oil return line to an oil sump of the associated internal combustion engine can be connected.

    In dem in Figur 2 gezeigten Querschnitt durch den Ölabscheider 1 ist besonders die platzsparende und kompakte Anordnung der vier Zyklone 11 - 14 ersichtlich. Ganz rechts ist der Leitungsanschlußstutzen 29 sichtbar, an den eine vom Kurbelgehäuse der zugehörigen Brennkraftmaschine kommende Leitung anschließbar ist, durch die aus dem Kurbelgehäuse kommendes, mit Öltröpfchen befrachtetes Kurbelgehäuse-Entlüftungsgas zum Ölabscheider 1 führbar ist. Weiter nach links wird erkennbar, daß sich der Haupt-Zuströmkanal 20 im Bereich des Übergangsstücks 28 verbreitert und, wie anhand von Figur 1 erläutert, zugleich abflacht. Noch weiter nach links teilt sich der Haupt-Zuströmkanal 20 in vier Zuströmkanäle oder Gaseinlässe 21 - 24 auf, die jeweils einem der Zyklone 11 - 14 zugeordnet sind. Dabei führt jeder Zuströmkanal oder Gaseinlaß 21 - 24 tangential in seinen zugehörigen Zyklon 11 - 14. Bei den beiden Zyklonen 11 und 12 ist der Verlauf so, daß sich eine rechtsdrehende Gasströmung ergibt, während bei den Zyklonen 13 und 14 die Gasströmung unter Linksdrehung erfolgt. Im inneren Bereich jedes Zyklons 11 - 14 fällt der Blick jeweils durch den zugehörigen Gasauslaß 31 - 34 auf den jeweils ganz unten am Zyklon 11 - 14 angeordneten Ölauslaß 41 - 44. Ganz unten ist im Hintergrund in Figur 2 noch ein kleiner Teil des Sammeltrichters 48 für das abgeschiedene Öl erkennbar.In the cross section shown in Figure 2 through the oil separator 1 is particularly the space-saving and compact Arrangement of the four cyclones 11-14 can be seen. All on the right the line connection piece 29 is visible one from the crankcase of the associated internal combustion engine incoming line can be connected, through which the crankcase coming loaded with oil droplets Crankcase ventilation gas to the oil separator 1 feasible is. Further to the left you can see that the Main inflow channel 20 in the area of the transition piece 28 widened and, as explained with reference to Figure 1, at the same time flattens. It divides even further to the left Main inflow channel 20 into four inflow channels or gas inlets 21-24, each one of the cyclones 11-14 assigned. Each inflow channel or Gas inlet 21-24 tangentially into its associated cyclone 11 - 14. For the two cyclones 11 and 12 is the Course so that there is a right-handed gas flow, while with cyclones 13 and 14 the gas flow is done by turning to the left. Inside each cyclone 11 - 14 the view falls through the corresponding one Gas outlet 31 - 34 on the bottom of the cyclone 11 - 14 arranged oil outlet 41 - 44. At the bottom is in the background in Figure 2 is still a small part of the Collecting funnel 48 recognizable for the separated oil.

    Besonders die Figur 2 verdeutlicht, daß der ankommende Gasstrom ohne Umlenkung und somit praktisch ohne Erhöhung des Strömungswiderstandes auf die vier einzelnen Zyklone 11 - 14 verteilt wird. Durch diese Aufteilung des Gasstroms auf mehrere Zyklone ergibt sich eine verbesserte Ölabscheidung, insbesondere bei geringeren anfallenden Mengen an Entlüftungsgasen, bei zugleich geringerer Empfindlichkeit gegen Schwankungen des Volumenstroms des Kurbelgehäuse-Entlüftungsgases.Figure 2 in particular shows that the incoming Gas flow without redirection and thus practically without increase the flow resistance to the four individual Cyclones 11-14 is distributed. Through this division the gas flow to several cyclones results in an improved Oil separation, especially for smaller ones Quantities of vent gases, at the same time lower Sensitivity to fluctuations in the volume flow of the crankcase ventilation gas.

    Wie das Ausführungsbeispiel des Ölabscheiders 1 weiter zeigt, läßt sich dieser aus wenigen Einzelteilen, im vorliegenden Beispiel aus dem Haupt-Bauteil 10, dem Übergangssstück 28, den zu einem Teil zusammengefaßten Gasauslässen 31 - 34, der Sammelhaube 38 und dem Sammeltrichter 48 herstellen. Dazu kommen noch zugehörige Verbindungsleitungen, die vorteilhaft als Schläuche ausgeführt sind, wie dies an sich bekannt ist. Alternativ können einzelne oder alle Verbindungsleitungen, zumindest über Teilstrecken, in weitere Komponenten der Brennkraftmaschine integriert sein, was die Fertigung und Montage separater Leitungen reduziert oder sogar ganz überflüssig macht. Die genannten Teile des Ölabscheiders 1 sind zweckmäßig Druckgußteile aus Leichtmetall oder Spritzgußteile aus Kunststoff, wobei ein Kunststoff zu wählen ist, der den auftretenden thermischen und chemischen Belastungen gewachsen ist.Like the embodiment of the oil separator 1 further shows, this can be made from a few individual parts, in the present Example from the main component 10, the transition piece 28, the combined gas outlets 31 - 34, the collecting hood 38 and the collecting funnel 48 manufacture. In addition there are associated connecting lines, which are advantageously carried out as hoses are, as is known per se. alternative can individual or all connecting lines, at least over sections, into other components of the internal combustion engine be integrated in what the manufacturing and assembly separate lines reduced or even completely unnecessary makes. The specified parts of the oil separator 1 are useful die-cast parts made of light metal or Injection molded plastic, one plastic too is to choose the thermal and chemical occurring Stress has grown.

    Claims (10)

    1. Oil separator (1) for deoiling of crankcase ventilation gases of a combustion engine, with the oil separator (1) comprising a cyclone that is provided with a gas inlet connected to the crankcase of the combustion engine, a gas outlet connected to the intake section of the combustion engine, and an oil outlet connected to an oil pan of the combustion engine,
      characterized in that
      in the stead of one single cyclone several smaller cyclones (11, 12, 13, 14), that are connected in parallel, are provided.
    2. Oil separator according to claim 1, characterized in that the cyclones (11-14) are designed with a tangential direction of inflow.
    3. Oil separator according to claim 1 or 2, characterized in that the bodies of the individual cyclones comprise central axes and are combined to form one cyclone body component, with the central axes running in parallel to each other.
    4. Oil separator according to one of the preceding claims, characterized in that the inflow ducts (21-24) that are running to the respective gas inlet of the individual cyclones (11-14) are formed by a single splitting or parting main inflow duct (20).
    5. Oil separator according to claim 4, characterized in that the main inflow duct (20) and the individual inflow ducts (21-24) are combined to form one inflow duct component.
    6. Oil separator according to one of claims 3 through 5, characterized in that the cyclone body component and the inflow duct component are combined to form one main component (10).
    7. Oil separator according to claim 1 or 2, characterized in that the individual cyclones (11-14) are positioned in a decentralized arrangement in and/or at the combustion engine.
    8. Oil separator according to claim 7, characterized in that the individual cyclones (11-14) are, at least in part, integrated in one or several other components of the combustion engine.
    9. Oil separator according to claim 8, characterized in that the other component of the combustion engine is represented by the latter's cylinder head cover or air filter body.
    10. Oil separator according to one of the preceding claims, characterized in that its component parts are die castings that are made of light metal and/or molded parts that are made of plastic.
    EP00916937.6A 1999-03-18 2000-03-14 Oil separator for removing oil from the crankcase ventilation gases of an internal combustion engine Expired - Lifetime EP1080298B2 (en)

    Applications Claiming Priority (3)

    Application Number Priority Date Filing Date Title
    DE19912271 1999-03-18
    DE19912271A DE19912271A1 (en) 1999-03-18 1999-03-18 Oil separator for de-oiling crankcase ventilation gases of an internal combustion engine
    PCT/EP2000/002230 WO2000057038A1 (en) 1999-03-18 2000-03-14 Oil separator for removing oil from the crankcase ventilation gases of an internal combustion engine

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    EP1080298A1 EP1080298A1 (en) 2001-03-07
    EP1080298B1 true EP1080298B1 (en) 2003-07-30
    EP1080298B2 EP1080298B2 (en) 2018-08-29

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    EP (1) EP1080298B2 (en)
    JP (1) JP2002540338A (en)
    KR (1) KR100636758B1 (en)
    BR (1) BR0005393A (en)
    DE (4) DE19912271A1 (en)
    WO (1) WO2000057038A1 (en)

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    DE202007003292U1 (en) 2007-03-02 2008-07-10 Hengst Gmbh & Co.Kg Oil separator with at least one cyclone
    DE102009040330A1 (en) 2009-09-07 2011-03-10 Fev Motorentechnik Gmbh Oil extractor for oil removal of ventilation gases from crankcase of internal combustion engine, has gas inlet, gas outlet, oil outlet and multiple cyclone filters which are connected between gas inlet and oil outlet
    US9795898B2 (en) 2015-03-31 2017-10-24 Jci Cyclonics Ltd. Cyclonic separator system

    Also Published As

    Publication number Publication date
    KR20010071280A (en) 2001-07-28
    DE20023968U1 (en) 2008-03-06
    DE20023969U1 (en) 2008-03-06
    WO2000057038A1 (en) 2000-09-28
    KR100636758B1 (en) 2006-10-20
    DE19912271A1 (en) 2000-09-28
    EP1080298A1 (en) 2001-03-07
    JP2002540338A (en) 2002-11-26
    EP1080298B2 (en) 2018-08-29
    DE50003081D1 (en) 2003-09-04
    US6279556B1 (en) 2001-08-28
    BR0005393A (en) 2001-01-30

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