EP2525055A2 - Combustion engine - Google Patents

Combustion engine Download PDF

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Publication number
EP2525055A2
EP2525055A2 EP12163136A EP12163136A EP2525055A2 EP 2525055 A2 EP2525055 A2 EP 2525055A2 EP 12163136 A EP12163136 A EP 12163136A EP 12163136 A EP12163136 A EP 12163136A EP 2525055 A2 EP2525055 A2 EP 2525055A2
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EP
European Patent Office
Prior art keywords
lubricant
combustion engine
internal combustion
gas
crankcase ventilation
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.)
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Application number
EP12163136A
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German (de)
French (fr)
Other versions
EP2525055A3 (en
Inventor
Wolfgang Dr. Semet
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.)
Bayerische Motoren Werke AG
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Bayerische Motoren Werke AG
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Publication date
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Publication of EP2525055A2 publication Critical patent/EP2525055A2/en
Publication of EP2525055A3 publication Critical patent/EP2525055A3/en
Withdrawn legal-status Critical Current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
    • F01M13/02—Crankcase ventilating or breathing by means of additional source of positive or negative pressure
    • F01M13/021—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure
    • 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
    • F01M13/02—Crankcase ventilating or breathing by means of additional source of positive or negative pressure
    • F01M13/021—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure
    • F01M13/022—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure using engine inlet suction
    • 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
    • F01M1/00—Pressure lubrication
    • F01M1/12—Closed-circuit lubricating systems not provided for in groups F01M1/02 - F01M1/10
    • F01M2001/126—Dry-sumps
    • 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
    • F01M2013/0072—Layout of crankcase breathing systems having one or more deoilers having a plurality of deoilers in series

Definitions

  • the invention relates to an internal combustion engine having a device for separating lubricant from a crankcase ventilation gas of the internal combustion engine with the features of the preamble of patent claim 1.
  • Object of the present invention is to show for an internal combustion engine with a dry sump lubrication means for separating lubricant from the crankcase ventilation gas of the internal combustion engine.
  • the lubricant consumption of the engine is reduced and thus the exhaust emissions improved, reduces the burden of emissions-influencing components (catalyst and lambda probe) by deposits and the risk of complete engine damage avoided by Glühzünditch due to the lubricant content in the intake air.
  • the lubricant delivery device according to claim 2 can be operated with lubricant itself or a gas.
  • the already existing lubricant pump of the In operation of the lubricant delivery device with lubricant Internal combustion engine are used. For this purpose, a part of the lubricant flow is used.
  • an additional gas delivery device is to be provided, for example an air pump.
  • FIG. 1 schematically an internal combustion engine 1 with a device for separating lubricant from a crankcase ventilation gas of the internal combustion engine 1 is shown.
  • the internal combustion engine 1 consists essentially of a not numbered cylinder head with an inlet and an outlet valve, an intake pipe and an exhaust pipe, and a in a cylinder of the crankcase 1 'driven by a crank drive piston. Flow directions of intake gas and exhaust gas are shown symbolically by arrows. In the lower part of the crankcase 1 ', a dry sump lubrication for the internal combustion engine 1 is arranged.
  • the lubricant is carried in a separate container and transported by a pressure pump (lubricant pump 7) to the lubrication points.
  • the dripping lubricant In contrast to the pressure circulation lubrication by means of a second return pump (lubricant delivery device 6) sucked out of the lubricant sump and conveyed back into the lubricant reservoir.
  • the lubricant delivery device 6 has a higher delivery rate than the lubricant pump 7 in order to reliably pump the lubricant from the crankcase 1 'into the lubricant reservoir in every driving situation.
  • blow-by gas mixed with lubricant is supplied first through a crankcase ventilation line 2 in the present exemplary embodiment to a second lubricant separator 9, a lubricant coarse separator.
  • Lubricant precipitated in the second lubricant separator 9 is returned to the crankcase 1 'through a second lubricant return line 10.
  • These roughly pre-cleaned blow-by gases are then passed through the crankcase ventilation line 2 on to a lubricant separator 3, a fine separator, such as a cyclone separator.
  • a fine separator such as a cyclone separator.
  • the thus cleaned blow-by gas is now returned through the crankcase ventilation line 2 back to the intake of the internal combustion engine 1 for combustion.
  • the lubricant which collects at the lubricant outlet 4 of the lubricant separator 3, is returned to the crankcase 1 'via a lubricant return line 5.
  • a lubricant delivery device 6 is provided in the lubricant return line 5.
  • this lubricant delivery device 6 is an ejector pump.
  • This lubricant conveyor 6 in the form of a suction jet pump, as shown in the present embodiment, directly operable with the lubricant of the internal combustion engine 1. In another embodiment, it can also be operated via an additional air pump with gas.
  • the supply of the internal combustion engine 1 anyway existing lubricant pump 7 is used.
  • a partial lubricant flow of the lubricant pump 7 is used to the internal combustion engine 1, d. H. a partial lubricant flow is conveyed through a conduit 8 for operation of the lubricant delivery device 6.
  • Fig.2 shows a section through a known suction jet pump or lubricant conveying device.
  • nozzle 8 is a nozzle for the line 8 for the partial lubricant flow coming from the lubricant pump 7 (the nozzle 8 is part of the line 8). At this nozzle 8 lubricant is introduced into the lubricant conveying device 6, an insertion direction is shown with an arrow and labeled with "inlet pressure oil”.
  • the lubricant return line 5 with a nozzle is referred to the lubricant return line 5 can be arranged (also the nozzle 5 forms part of the lubricant return line 5).
  • the flow direction is again shown by an arrow and labeled with "inlet return oil / blow-by gas”.
  • outlet nozzle 11 is designated, at which the subsidized lubricant, the lubricant delivery device 6 exits again.
  • the flow direction is again indicated by an arrow and labeled with "outlet pressure oil” and "return oil / blow-by gas”.
  • a pressure ratio is built up by the partial lubricant conveying flow (pressurized oil) inside the lubricant conveying device 6, so that backflow of blow-by gases toward the lubricant separator 3 becomes impossible.
  • a suction jet pump for conveying the return lubricant from the lubricant separator 3 reduces the lubricant consumption of the internal combustion engine 1 and thus improves the exhaust emissions, reduces the load on the emission-influencing components (catalytic converter and lambda probe) through deposits and reduces the risk of complete engine damage Ignition ignitions due to the lubricant content in the intake air avoided.

Landscapes

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

Abstract

The internal combustion engine (1) has dry sump lubrication and a lubricant conveying device (6) is provided as a suction jet pump. A device is provided for separating the lubricant from a crankcase ventilation gas of the internal combustion engine with a crankcase ventilation line (2). A lubricant separator (3) is arranged with a lubricant outlet (4) in the crankcase ventilation line. The crankcase ventilation gas separated lubricant is guided to a crankcase (1') from a lubricant return line (5). The lubricant conveying device is operated with the lubricant or a gas.

Description

Die Erfindung betrifft eine Brennkraftmaschine mit einer Einrichtung zum Abscheiden von Schmiermittel aus einem Kurbelgehäuseentlüftungsgas der Brennkraftmaschine mit den Merkmalen aus dem Oberbegriff des Patentanspruchs 1.The invention relates to an internal combustion engine having a device for separating lubricant from a crankcase ventilation gas of the internal combustion engine with the features of the preamble of patent claim 1.

Sie geht von der deutschen Gebrauchsmusterschrift DE 20 2005 018 132 U1 aus. Aus dieser ist eine Brennkraftmaschine mit einer Einrichtung zum Abscheiden von Öl aus dem Kurbelgehäuseentlüftungsgas der Brennkraftmaschine, mit mindestens einer Kurbelgehäuseentlüftungsleitung, in deren Verlauf mindestens ein Ölabscheider mit einem Ölauslass angeordnet ist, bekannt. An diesen Ölauslass ist eine Ölrückführleitung für aus dem Kurbelgehäuseentlüftungsgas abgeschiedenes Öl zum Kurbelgehäuse der Brennkraftmaschine angeordnet. Die Einrichtung zum Abscheiden von Öl ist dadurch gekennzeichnet, dass im Verlauf der Ölrückführleitung eine Ölfördervorrichtung angeordnet ist. Bei dieser Ölfördervorrichtung kann es sich beispielsweise um eine Zahnradpumpe handeln.It comes from the German utility model DE 20 2005 018 132 U1 out. From this, an internal combustion engine with a device for separating oil from the crankcase ventilation gas of the internal combustion engine, with at least one crankcase ventilation line, in the course of which at least one oil separator is arranged with an oil outlet known. At this oil outlet, an oil return line is arranged for separated from the crankcase ventilation gas oil to the crankcase of the internal combustion engine. The device for separating oil is characterized in that an oil delivery device is arranged in the course of the oil return line. This oil delivery device may be, for example, a gear pump.

Bei Brennkraftmaschinen mit Trockensumpf, d. h. mit einem getrennten Schmiermittelvorratsbehälter, der mit einer Saugpumpe befüllt und aus dem die Schmiermittelpumpe versorgt wird, kann der Rücklauf des Schmiermittels aus dem Schmiermittelabscheider, beispielsweise einem Zyklon, konzeptbedingt nicht unter den Schmiermittelspiegel in der Schmiermittelwanne eingeleitet werden. Dadurch kann Blow-By-Gas entgegen der Strömungsrichtung des Schmiermittels durch die Schmiermittelrücklaufleitung in den Schmiermittelabscheider strömen und stört dessen Funktion, so dass Schmiermittel in den Luftfilterkasten mitgerissen werden kann. Aus Packagegründen sind andere Schmiermittelabscheider, wie z. B. Zentrifugen, häufig nicht einsetzbar. Aus Packagegründen, wegen der hohen Kosten und der Ausfallsicherheit sind elektrisch oder mechanisch angetriebene Pumpen, wie z. B. Kolben- oder Zahnradpumpen für diese Funktion nicht geeignet.In internal combustion engines with dry sump, ie with a separate lubricant reservoir, which is filled with a suction pump and from which the lubricant pump is supplied, the return of the lubricant from the lubricant, such as a cyclone, conceptually not initiated under the lubricant level in the lubricant pan become. As a result, blow-by gas can flow against the flow direction of the lubricant through the lubricant return line into the lubricant separator and disturbs its function, so that lubricant can be entrained in the air filter box. For package reasons, other lubricant, such. As centrifuges, often not used. For package reasons, because of the high cost and reliability are electrically or mechanically driven pumps, such as. B. piston or gear pumps for this function is not suitable.

Aufgabe der vorliegenden Erfindung ist es, für eine Brennkraftmaschine mit einer Trockensumpfschmierung eine Einrichtung zum Abscheiden von Schmiermittel aus dem Kurbelgehäuseentlüftungsgas der Brennkraftmaschine aufzuzeigen.Object of the present invention is to show for an internal combustion engine with a dry sump lubrication means for separating lubricant from the crankcase ventilation gas of the internal combustion engine.

Diese Aufgabe wird durch die Merkmale im kennzeichnenden Teil des Patentanspruchs 1 gelöst.This object is solved by the features in the characterizing part of patent claim 1.

Durch den Einsatz einer Saugstrahlpumpe zum Fördern des rücklaufenden Schmiermittels aus dem Schmiermittelabscheider, beispielsweise einem Zyklon, wird der Schmiermittelverbrauch der Brennkraftmaschine reduziert und damit verbunden die Abgasemissionen verbessert, die Belastung der emissionsbeeinflussenden Bauteile (Katalysator und Lambdasonde) durch Ablagerungen verringert und die Gefahr von kompletten Brennkraftmaschinenschäden durch Glühzündungen aufgrund des Schmiermittelanteils in derAnsaugluft vermieden.Through the use of a suction jet pump for conveying the returning lubricant from the lubricant separator, such as a cyclone, the lubricant consumption of the engine is reduced and thus the exhaust emissions improved, reduces the burden of emissions-influencing components (catalyst and lambda probe) by deposits and the risk of complete engine damage avoided by Glühzündungen due to the lubricant content in the intake air.

Vorteilhafte Weiterbildungen sind in den Unteransprüchen ausgeführt.Advantageous developments are set forth in the subclaims.

In vorteilhafter Weise kann die Schmiermittelfördervorrichtung gemäß Patentanspruch 2 mit Schmiermittel selbst oder einem Gas betrieben werden.Advantageously, the lubricant delivery device according to claim 2 can be operated with lubricant itself or a gas.

Gemäß Patentanspruch 3 kann beim Betrieb der Schmiermittelfördervorrichtung mit Schmiermittel die ohnehin vorhandene Schmiermittelpumpe der Brennkraftmaschine zum Einsatz kommen. Hierfür wird ein Teil des Schmiermittelförderstroms benutzt.According to claim 3, the already existing lubricant pump of the. In operation of the lubricant delivery device with lubricant Internal combustion engine are used. For this purpose, a part of the lubricant flow is used.

Beim Betrieb der Schmiermittelfördervorrichtung mit Gas ist eine zusätzliche Gasfördervorrichtung vorzuhalten, beispielsweise eine Luftpumpe.When operating the lubricant delivery device with gas, an additional gas delivery device is to be provided, for example an air pump.

Im Folgenden ist die Erfindung anhand eines bevorzugten Ausführungsbeispieles in zwei Figuren näher erläutert.

Fig. 1
zeigt schematisch eine Brennkraftmaschine mit einer Einrichtung zum Abscheiden von Schmiermittel aus einem Kurbelgehäuseentlüftungsgas der Brennkraftmaschine.
Fig. 2
zeigt einen Schnitt durch eine bekannte Saugstrahlpumpe.
In the following the invention with reference to a preferred embodiment is explained in more detail in two figures.
Fig. 1
schematically shows an internal combustion engine with a device for separating lubricant from a crankcase ventilation gas of the internal combustion engine.
Fig. 2
shows a section through a known suction jet pump.

Im Folgenden gelten in den Fig. 1 und 2 für gleiche Bauelemente die gleichen Bezugsziffern.The following apply in the Fig. 1 and 2 for same components the same reference numbers.

In Fig. 1 ist schematisch eine Brennkraftmaschine 1 mit einer Einrichtung zum Abscheiden von Schmiermittel aus einem Kurbelgehäuseentlüftungsgas der Brennkraftmaschine 1 dargestellt. Die Brennkraftmaschine 1 besteht im Wesentlichen aus einem nicht separat bezifferten Zylinderkopf mit einem Ein- und einem Auslassventil, einer Ansaugleitung und einer Abgasleitung, sowie einem in einem Zylinder des Kurbelgehäuses 1' von einem Kurbeltrieb antreibbaren Kolben. Strömungsrichtungen von Ansauggas und Abgas sind durch Pfeile symbolisch dargestellt. Im unteren Teil des Kurbelgehäuses 1' ist eine Trockensumpfschmierung für die Brennkraftmaschine 1 angeordnet.In Fig. 1 schematically an internal combustion engine 1 with a device for separating lubricant from a crankcase ventilation gas of the internal combustion engine 1 is shown. The internal combustion engine 1 consists essentially of a not numbered cylinder head with an inlet and an outlet valve, an intake pipe and an exhaust pipe, and a in a cylinder of the crankcase 1 'driven by a crank drive piston. Flow directions of intake gas and exhaust gas are shown symbolically by arrows. In the lower part of the crankcase 1 ', a dry sump lubrication for the internal combustion engine 1 is arranged.

Ähnlich wie bei einer Frischölschmierung wird hier das Schmiermittel in einem separaten Behälter mitgeführt und durch eine Druckpumpe (Schmiermittelpumpe 7) an die Schmierstellen befördert. Das abtropfende Schmiermittel wird im Gegensatz zur Druckumlaufschmierung mittels einer zweiten Rückförderpumpe (Schmiermittelfördervorrichtung 6) aus dem Schmiermittelsumpf abgesaugt und zurück in den Schmiermittelbehälter gefördert. Die Schmiermittelfördervorrichtung 6 hat dabei grundsätzlich eine höhere Förderleistung als die Schmiermittelpumpe 7, um bei jeder Fahrsituation das Schmiermittel zuverlässig aus dem Kurbelgehäuse 1' in das Schmiermittelreservoir zu pumpen.Similar to a fresh oil lubrication here the lubricant is carried in a separate container and transported by a pressure pump (lubricant pump 7) to the lubrication points. The dripping lubricant In contrast to the pressure circulation lubrication by means of a second return pump (lubricant delivery device 6) sucked out of the lubricant sump and conveyed back into the lubricant reservoir. In principle, the lubricant delivery device 6 has a higher delivery rate than the lubricant pump 7 in order to reliably pump the lubricant from the crankcase 1 'into the lubricant reservoir in every driving situation.

Beim Betrieb der Brennkraftmaschine 1 wird mit Schmiermitteinebel versetztes Blow-By-Gas durch eine Kurbeigehäuseentlüftungsleitung 2 in dem vorliegenden Ausführungsbeispiel zuerst einem zweiten Schmiermittelabscheider 9, einem Schmiermittelgrobabscheider, zugeführt. In dem zweiten Schmiermittelabscheider 9 ausgefälltes Schmiermittel wird durch eine zweite Schmiermittelrückführleitung 10 in das Kurbelgehäuse 1' zurückgeführt. Diese grob vorgereinigten Blow-By-Gase werden anschließend durch die Kurbelgehäuseentlüftungsleitung 2 weiter an einen Schmiermittelabscheider 3 geleitet, einem Feinabscheider, wie beispielsweise einem Zyklonabscheider. In diesem Schmiermittelabscheider 3 werden auch feinste Schmiermittelteilchen, aus dem Blow-By-Gas abgeschieden, die sich anschließend schwerkraftbedingt geodätisch unten an einem Schmiermittelauslass 4 sammeln.During operation of the internal combustion engine 1, blow-by gas mixed with lubricant is supplied first through a crankcase ventilation line 2 in the present exemplary embodiment to a second lubricant separator 9, a lubricant coarse separator. Lubricant precipitated in the second lubricant separator 9 is returned to the crankcase 1 'through a second lubricant return line 10. These roughly pre-cleaned blow-by gases are then passed through the crankcase ventilation line 2 on to a lubricant separator 3, a fine separator, such as a cyclone separator. In this lubricant separator 3, even the finest lubricant particles are separated from the blow-by gas, which then collect geodetically at the bottom of a lubricant outlet 4 due to gravity.

Das derart gereinigte Blow-By-Gas wird nun durch die Kurbelgehäuseentlüftungsleitung 2 wieder der Ansaugleitung der Brennkraftmaschine 1 zur Verbrennung rückgeführt. Das Schmiermittel, das sich am Schmiermittelauslass 4 des Schmiermittelabscheiders 3 sammelt, wird über eine Schmiermittelrückführleitung 5 wieder dem Kurbelgehäuse 1' zugeführt. Damit keine negative Strömung, d. h. Rückströmen von Blow-By-Gasen aus dem Kurbelgehäuse 1' in dem Schmiermittelabscheider 3 erfolgt, ist in der Schmiermittelrückführleitung 5 eine Schmiermittelfördereinrichtung 6 vorgesehen. Erfindungsgemäß handelt es sich bei dieser Schmiermittelfördereinrichtung 6 um eine Saugstrahlpumpe.The thus cleaned blow-by gas is now returned through the crankcase ventilation line 2 back to the intake of the internal combustion engine 1 for combustion. The lubricant, which collects at the lubricant outlet 4 of the lubricant separator 3, is returned to the crankcase 1 'via a lubricant return line 5. So that no negative flow, ie backflow of blow-by gases from the crankcase 1 'takes place in the lubricant separator 3, a lubricant delivery device 6 is provided in the lubricant return line 5. According to the invention, this lubricant delivery device 6 is an ejector pump.

Diese Schmiermittelfördereinrichtung 6 in Form einer Saugstrahlpumpe ist, wie im vorliegenden Ausführungsbeispiel dargestellt, direkt mit dem Schmiermittel der Brennkraftmaschine 1 betreibbar. In einem anderen Ausführungsbeispiel kann sie auch über eine zusätzliche Luftpumpe mit Gas betrieben werden.This lubricant conveyor 6 in the form of a suction jet pump, as shown in the present embodiment, directly operable with the lubricant of the internal combustion engine 1. In another embodiment, it can also be operated via an additional air pump with gas.

In dem vorliegenden Ausführungsbeispiel kommt die zur Versorgung der Brennkraftmaschine 1 ohnehin vorhandene Schmiermittelpumpe 7 zum Einsatz. Zum Betrieb der Schmiermittelfördervorrichtung 6 wird ein Teilschmiermittelförderstrom der Schmiermittelpumpe 7 zur Brennkraftmaschine 1 verwendet, d. h. ein Teilschmiermittelförderstrom wird durch eine Leitung 8 zum Betrieb der Schmiermittelfördervorrichtung 6 gefördert.In the present embodiment, the supply of the internal combustion engine 1 anyway existing lubricant pump 7 is used. For operation of the lubricant delivery device 6, a partial lubricant flow of the lubricant pump 7 is used to the internal combustion engine 1, d. H. a partial lubricant flow is conveyed through a conduit 8 for operation of the lubricant delivery device 6.

Fig.2 zeigt einen Schnitt durch eine bekannte Saugstrahlpumpe, bzw. Schmiermittelfördervorrichtung 6. Fig.2 shows a section through a known suction jet pump or lubricant conveying device. 6

Mit 8 ist ein Stutzen für die Leitung 8 für den Teilschmiermittelförderstrom kommend von der Schmiermittelpumpe 7 bezeichnet (der Stutzen 8 ist Teil der Leitung 8). An diesem Stutzen 8 wird Schmiermittel in die Schmiermittelfördervorrichtung 6 eingebracht, eine Einbringrichtung ist mit einem Pfeil dargestellt und mit "Eintritt Drucköl" beschriftet.8 is a nozzle for the line 8 for the partial lubricant flow coming from the lubricant pump 7 (the nozzle 8 is part of the line 8). At this nozzle 8 lubricant is introduced into the lubricant conveying device 6, an insertion direction is shown with an arrow and labeled with "inlet pressure oil".

Mit 5 ist ein Stutzen bezeichnet, an den die Schmiermittelrückführleitung 5 anordenbar ist (auch der Stutzen 5 bildet einen Teil der Schmiermittelrückführleitung 5). Die Fließrichtung ist wiederum durch einen Pfeil dargestellt und mit "Eintritt Rücklauföl/Blow-By Gas" beschriftet.5 with a nozzle is referred to the lubricant return line 5 can be arranged (also the nozzle 5 forms part of the lubricant return line 5). The flow direction is again shown by an arrow and labeled with "inlet return oil / blow-by gas".

Mit 11 ist eine Austrittsdüse bezeichnet, an der das geförderte Schmiermittel die Schmiermittelfördervorrichtung 6 wieder austritt. Die Fließrichtung ist wieder mit einem Pfeil dargestellt und mit "Austritt Drucköl" und "Rücklauföl/Blow-By-Gas" beschriftet. Beim Betrieb der Schmiermittelfördervorrichtung 6 wird durch den Teilschmiermittelförderstrom (Drucköl) im Inneren der Schmiermittelfördervorrichtung 6 ein Druckverhältnis aufgebaut, so dass ein Rückströmen von Blow-By-Gasen in Richtung Schmiermittelabscheider 3 unmöglich wird.With an outlet nozzle 11 is designated, at which the subsidized lubricant, the lubricant delivery device 6 exits again. The flow direction is again indicated by an arrow and labeled with "outlet pressure oil" and "return oil / blow-by gas". During operation of the lubricant delivery device 6, a pressure ratio is built up by the partial lubricant conveying flow (pressurized oil) inside the lubricant conveying device 6, so that backflow of blow-by gases toward the lubricant separator 3 becomes impossible.

Durch den erfindungsgemäßen Einsatz einer Saugstrahlpumpe zum Fördern des Rücklaufschmiermittels aus dem Schmiermittelabscheider 3 wird der Schmiermittelverbrauch der Brennkraftmaschine 1 reduziert und damit verbunden die Abgasemissionen verbessert, die Belastung der emissionsbeeinflussenden Bauteile (Katalysator und Lambda-Sonde) durch Ablagerungen verringert und die Gefahr von kompletten Brennkraftmaschinenschäden durch Glühzündungen aufgrund des Schmiermittelanteils in der Ansaugluft vermieden.The use according to the invention of a suction jet pump for conveying the return lubricant from the lubricant separator 3 reduces the lubricant consumption of the internal combustion engine 1 and thus improves the exhaust emissions, reduces the load on the emission-influencing components (catalytic converter and lambda probe) through deposits and reduces the risk of complete engine damage Ignition ignitions due to the lubricant content in the intake air avoided.

Bezugszeichenliste:LIST OF REFERENCE NUMBERS

1.1.
BrennkraftmaschineInternal combustion engine
1'1'
Kurbelgehäusecrankcase
2.Second
KurbeigehäuseentlüftungsleitungKurbeigehäuseentlüftungsleitung
3.Third
Schmiermittelabscheiderlubricant separator
4.4th
Schmiermittelauslasslubricant outlet
5.5th
SchmiermittelrückführleitungLubricant return line
8.8th.
SchmiermittelfördervorrichtungLubricant conveyor
7.7th
Schmiermittelpumpelubricant pump
8.8th.
Leitung für Teil-SchmiermittelförderstromLine for partial lubricant flow
9.9th
zweiter Schmiermittelabscheidersecond lubricant separator
10.10th
zweite Schmiermittelrückführfeitungsecond lubricant return line
11.11th
Austrittsdüseexhaust nozzle

Claims (4)

Brennkraftmaschine (1) mit einer Einrichtung zum Abscheiden von Schmiermittel aus einem Kurbeigehäuseentlüftungsgas der Brennkraftmaschine (1), mit mindestens einer Kurbelgehäuseentlüftungsleitung (2), in der mindestens ein Schmiermittelabscheider (3) mit einem Schmiermittelauslass (4) angeordnet ist, von dem eine Schmiermittelrückführleitung (5) für aus dem Kurbeigehäuseentlüftungsgas abgeschiedenes Schmiermittel zu einem Kurbelgehäuse (1') der Brennkraftmaschine (1) geführt ist, wobei im Verlauf der Schmiermittelrückführleitung (5) eine Schmiermittelfördervorrichtung (6) angeordnet ist, dadurch gekennzeichnet, dass die Brennkraftmaschine (1) eine Trockensumpfschmierung aufweist und die Schmiermittelfördervorrichtung (6) eine Saugstrahlpumpe ist.Internal combustion engine (1) having a device for separating lubricant from a crankcase ventilation gas of the internal combustion engine (1), having at least one crankcase ventilation line (2), in which at least one lubricant separator (3) is arranged with a lubricant outlet (4) from which a lubricant return line ( 5) for lubricants separated from the crankcase ventilation gas to a crankcase (1 ') of the internal combustion engine (1) is guided, wherein in the course of the lubricant return line (5) a lubricant conveying device (6) is arranged, characterized in that the internal combustion engine (1) a dry sump lubrication and the lubricant delivery device (6) is a suction jet pump. Brennkraftmaschine nach Patentanspruch 1,
dadurch gekennzeichnet, dass die Schmiermittelfördervorrichtung (6) mit dem Schmiermittel oder einem Gas betreibbar ist.Internal combustion engine according to claim 1,
characterized in that the lubricant delivery device (6) is operable with the lubricant or a gas. Brennkraftmaschine nach Patentanspruch 2, wobei die Brennkraftmaschine (1) eine Schmiermittelpumpe (7) zur Versorgung der Brennkraftmaschine (1) mit Schmiermittel aufweist,
dadurch gekennzeichnet, dass ein Teil-Schmiermittelförderstrom der Schmiermittelpumpe (7) zur Brennkraftmaschine (1) zum Betrieb der Schmiermittelfördervorrichtung (6) vorgesehen ist.Internal combustion engine according to claim 2, wherein the internal combustion engine (1) has a lubricant pump (7) for supplying the internal combustion engine (1) with lubricant,
characterized in that a partial lubricant flow of the lubricant pump (7) to the internal combustion engine (1) for operation of the lubricant conveying device (6) is provided. Brennkraftmaschine nach Patentanspruch 2,
dadurch gekennzeichnet, dass zum Betrieb der Schmiermittelfördervorrichtung (6) eine Gasfördervorrichtung vorgesehen ist.Internal combustion engine according to claim 2,
characterized in that for the operation of the lubricant conveying device (6) a gas conveying device is provided.
EP12163136.0A 2011-05-16 2012-04-04 Combustion engine Withdrawn EP2525055A3 (en)

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Cited By (2)

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DE102015224566A1 (en) * 2015-12-08 2017-06-08 Mahle International Gmbh pumping device
CN110397486A (en) * 2019-09-03 2019-11-01 山东华盛农业药械有限责任公司 Four-stroke gasoline engine lubrication system with impeller pump

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