EP0690209A1 - Crankcase ventilation for internal combustion engines - Google Patents

Crankcase ventilation for internal combustion engines Download PDF

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Publication number
EP0690209A1
EP0690209A1 EP95107896A EP95107896A EP0690209A1 EP 0690209 A1 EP0690209 A1 EP 0690209A1 EP 95107896 A EP95107896 A EP 95107896A EP 95107896 A EP95107896 A EP 95107896A EP 0690209 A1 EP0690209 A1 EP 0690209A1
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EP
European Patent Office
Prior art keywords
crankcase
internal combustion
ventilation
outlet
combustion engines
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.)
Ceased
Application number
EP95107896A
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German (de)
French (fr)
Inventor
Walter Trefz
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.)
Mann and Hummel GmbH
Original Assignee
Filterwerk Mann and Hummel GmbH
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 Filterwerk Mann and Hummel GmbH filed Critical Filterwerk Mann and Hummel GmbH
Publication of EP0690209A1 publication Critical patent/EP0690209A1/en
Ceased 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
    • F01M13/0405—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil arranged in covering members apertures, e.g. caps
    • 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
    • F01M13/023—Control valves in suction conduit

Definitions

  • the invention relates to a crankcase ventilation for internal combustion engines according to the preamble of the main claim and the preamble of the independent claim 2.
  • DE-AS 12 68 902 describes a crankcase ventilation for internal combustion engines.
  • a connecting line leads upwards from a ventilation opening on the crankcase to an intake port.
  • a condensate separating chamber with a knitted filter is arranged in it, an outlet pipe with a shut-off valve leading out of the separating chamber.
  • the separated oil flows back into the crankcase on the wall of the breather nozzle. At higher gas velocities in the vent, however, the oil is prevented from refluxing. It is pulled into the intake manifold by the gas flow and enters the combustion process.
  • the object of the invention is therefore to provide a crankcase ventilation that also works reliably in internal combustion engines for vehicles.
  • the advantage of the invention can be seen in the fact that the arrangement of a plurality of connections or drain lines ensures that the collected oil is reliably drained even when the liquid separator is in a tilted position.
  • the individual drain lines lead into a common line, which then extends back inside the ventilation line into the crankcase.
  • the figure shows an oil separator of a crankcase ventilation for internal combustion engines.
  • the crankcase ventilation consists of a ventilation line 2 starting from a crankcase 1, a funnel-shaped liquid separator 3 with a separator pack 4 and a suction line 5 leading to the air inlet side of a piston machine (not shown).
  • a suitably designed bottom sieve 6 forms in the liquid separator 3 a collecting space 7 for separated liquid in the form of an annular groove. This channel lies in the area of the transition of the liquid separator 3 into the ventilation line 2.
  • a drain line 8 leads from this channel inside the ventilation line 2 back into the crankcase 1.
  • a hose 11 preferably made of an oil-resistant plastic, can be pushed onto the pipe end 10 of the drain line 8 in the area of the crankcase 1.
  • the hose 11 leads into a flow-reduced zone within the crankcase 1.
  • a further drain line 12 is provided parallel to the first drain line 8. This is arranged diametrically opposite. Of course, there is the possibility, for example, to arrange three or four drain lines. This ensures that the liquid in the collecting space 7 differs from the horizontal in almost every one Layer flows out of the oil separator.
  • All drain lines open into a common drain line 13, which - as already mentioned - can be connected to a hose 11.
  • a valve 14 is arranged in the oil separator, which limits the negative pressure which reacts from the suction pipe.
  • This valve consists of a valve seat 15, a rubber-elastic element 16 and a spring 17. At very high negative pressure in the suction line 5, the valve element 16 is moved downward against the spring force of the spring 17 and closes or reduces the passage cross section of the oil separator, so that an impermissibly high negative pressure cannot continue into the crankcase.
  • a membrane vent valve 19 is arranged in the cover 18 of the oil separator. This valve has the task of venting or venting the space located above the membrane 16.

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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)
  • Combustion Methods Of Internal-Combustion Engines (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)

Abstract

The breather is for an IC engine. It has a liquid-separator in the vent pipe from the crankcase, a collecting chamber for the liquid, and a connection to the engine intake pipe. Two diametrically-opposite outlets (12,8) are provided for the liquid from the chamber (7). The outlets can lead to a common drain pipe, and also to the outlets from an annular trough in the chamber. <IMAGE>

Description

Die Erfindung betrifft eine Kurbelgehäuseentlüftung für Brennkraftmaschinen nach dem Oberbegriff des Hauptanspruchs sowie dem Oberbegriff des nebengeordneten Anspruchs 2.The invention relates to a crankcase ventilation for internal combustion engines according to the preamble of the main claim and the preamble of the independent claim 2.

Es ist bekannt, den Öldampf aus dem Kurbelgehäuse einer Brennkraftmaschine abzusaugen, zu filtern und zu kühlen, um das Öl zurückzugewinnen.It is known to extract, filter and cool the oil vapor from the crankcase of an internal combustion engine in order to recover the oil.

In der DE-AS 12 68 902 ist eine Kurbelgehäuseentlüftung für Brennkraftmaschinen beschrieben. Von einer Entlüftungsöffnung am Kurbelgehäuse führt eine Verbindungsleitung nach oben zu einem Ansaugstutzen. In diesem ist eine Kondensatabscheidekammer mit einem Filtergestrick angeordnet, wobei aus der Abscheidekammer ein Ablaufrohr mit einem Absperrventil ins Freie führt. Das abgeschiedene Öl fließt unmittelbar an der Wand des Entlüftungsstutzens in das Kurbelgehäuse zurück. Bei höherer Gasgeschwindigkeit in dem Entlüftungsstutzen wird dem Öl jedoch der Rückfluß verwehrt. Es wird vom Gasstrom mit in den Ansaugstutzen gerissen und gelangt in den Verbrennungsvorgang.DE-AS 12 68 902 describes a crankcase ventilation for internal combustion engines. A connecting line leads upwards from a ventilation opening on the crankcase to an intake port. A condensate separating chamber with a knitted filter is arranged in it, an outlet pipe with a shut-off valve leading out of the separating chamber. The separated oil flows back into the crankcase on the wall of the breather nozzle. At higher gas velocities in the vent, however, the oil is prevented from refluxing. It is pulled into the intake manifold by the gas flow and enters the combustion process.

Es wird deshalb in der DE-OS 31 07 191 vorgeschlagen, zusätzlich eine Abflußleitung im Inneren der Entlüftungsleitung vorzusehen, durch welche die Flüssigkeit aus dem Sammelraum bis ins Kurbelgehäuse geleitet wird. Diese Abflußleitung funktioniert jedoch nur dann zuverlässig, wenn der Flüssigkeitsabscheider sich in einer exakten horizontalen Lage befindet. Bei Brennkraftmaschinen für Fahrzeuge, die mit einer solchen Kurbelgehäuseentlüftung ausgerüstet sind, ist jedoch die horizontale Lage nicht immer gewährleistet. Daher kann sich im Sammelraum eine größere Menge Flüssigkeit ansammeln, die nicht zuverlässig abgeführt wird. Diese Flüssigkeit wird auch hier bei höherer Gasgeschwindigkeit in den Ansaugstutzen gerissen und gelangt damit in den Verbrennungsvorgang.It is therefore proposed in DE-OS 31 07 191 to additionally provide a drain line inside the ventilation line, through which the liquid is led from the collecting space into the crankcase. However, this drain line only works reliably when the liquid separator is in an exact horizontal position. However, the horizontal position is not always guaranteed in internal combustion engines for vehicles which are equipped with such a crankcase ventilation. Therefore, a large amount of liquid can accumulate in the collecting space, which is not reliably discharged. Here, too, this liquid is torn into the intake manifold at a higher gas velocity and thus enters the combustion process.

Die Aufgabe der Erfindung liegt daher in der Schaffung einer Kurbelbehäuseentlüftung, die auch bei Brennkraftmaschinen für Fahrzeuge zuverlässig funktioniert.The object of the invention is therefore to provide a crankcase ventilation that also works reliably in internal combustion engines for vehicles.

Diese Aufgabe wird ausgehend von dem jeweiligen Oberbegriff durch die kennzeichnenden Merkmale der Ansprüche 1 oder 2 gelöst.This object is achieved on the basis of the respective preamble by the characterizing features of claims 1 or 2.

Der Vorteil der Erfindung ist darin zu sehen, daß durch die Anordnung mehrerer Anschlüsse bzw. Abflußleitungen auch bei einer gekippten Lage des Flüssigkeitsabscheiders ein zuverlässiger Ablauf des gesammelten Öls gewährleistet ist.The advantage of the invention can be seen in the fact that the arrangement of a plurality of connections or drain lines ensures that the collected oil is reliably drained even when the liquid separator is in a tilted position.

In einer weiteren Ausgestaltung wird vorgeschlagen, die einzelnen Abflußleitungen in eine gemeinsame Leitung münden zu lassen, welche dann im Inneren einer Entlüftungsleitung bis ins Kurbelgehäuse zurückreicht.In a further embodiment, it is proposed that the individual drain lines lead into a common line, which then extends back inside the ventilation line into the crankcase.

Gemäß einer weiteren Ausgestaltung ist vorgesehen, die Rinne für die abgeschiedene Flüssigkeit mit Anschlüssen zu versehen, an welche die Abflußleitungen angeschlossen werden können.According to a further embodiment, it is provided to provide the trough for the separated liquid with connections to which the drain lines can be connected.

Diese und weitere Merkmale von bevorzugten Weiterbildungen der Erfindung gehen außer aus den Ansprüchen auch aus der Beschreibung und den Zeichnungen hervor, wobei die einzelnen Merkmale jeweils für sich allein oder zu mehreren in Form von Unterkombinationen bei der Ausführungsform der Erfindung und auf anderen Gebieten verwirklicht sein und vorteilhafte sowie für sich schutzfähige Ausführungen darstellen können, für die hier Schutz beansprucht wird.These and further features of preferred developments of the invention emerge from the claims and also from the description and the drawings, the individual features each individually or in groups in the form of Sub-combinations can be realized in the embodiment of the invention and in other fields and can represent advantageous and protectable versions for which protection is claimed here.

Die Erfindung wird nachfolgend anhand eines Ausführungsbeispiels näher erläutert.The invention is explained in more detail below using an exemplary embodiment.

Die Figur zeigt einen Ölabscheider einer Kurbelgehäuseentlüftung für Brennkraftmaschinen.The figure shows an oil separator of a crankcase ventilation for internal combustion engines.

Wie der Figur zu entnehmen ist, besteht die Kurbelgehäuseentlüftung aus einer von einem Kurbelgehäuse 1 ausgehenden Entlüftungsleitung 2, aus einem trichterförmig ausgebildeten Flüssigkeitsabscheider 3 mit einer Abscheidepackung 4 sowie einer zur Lufteinlaßseite einer nicht gezeichneten Kolbenmaschine führenden Absaugleitung 5. Ein entsprechend ausgebildetes Bodensieb 6 bildet im Flüssigkeitsabscheider 3 einen Sammelraum 7 für abgeschiedene Flüssigkeit in Form einer ringförmigen Rinne. Diese Rinne liegt im Bereich des übergangs des Flüssigkeitsabscheiders 3 in die Entlüftungsleitung 2. Eine Abflußleitung 8 führt ausgehend von dieser Rinne im Inneren der Entlüftungsleitung 2 in das Kurbelgehäuse 1 zurück. Dadurch ist das abgeschiedene, zurückfließende Öl von den aufwärts strömenden Entlüftungsgasen getrennt und kommt mit diesen nicht in Berührung. Auf das Rohrende 10 der Abflußleitung 8 kann bei Bedarf im Bereich des Kurbelgehäuses 1 ein Schlauch 11, vorzugsweise aus einem ölresistenden Kunststoff, aufgeschoben werden. Der Schlauch 11 führt in eine strömungsberuhigte Zone innerhalb des Kurbelgehäuses 1.As can be seen from the figure, the crankcase ventilation consists of a ventilation line 2 starting from a crankcase 1, a funnel-shaped liquid separator 3 with a separator pack 4 and a suction line 5 leading to the air inlet side of a piston machine (not shown). A suitably designed bottom sieve 6 forms in the liquid separator 3 a collecting space 7 for separated liquid in the form of an annular groove. This channel lies in the area of the transition of the liquid separator 3 into the ventilation line 2. A drain line 8 leads from this channel inside the ventilation line 2 back into the crankcase 1. As a result, the separated, back-flowing oil is separated from the upward venting gases and does not come into contact with them. If necessary, a hose 11, preferably made of an oil-resistant plastic, can be pushed onto the pipe end 10 of the drain line 8 in the area of the crankcase 1. The hose 11 leads into a flow-reduced zone within the crankcase 1.

Parallel zu der ersten Abflußleitung 8 ist eine weitere Abflußleitung 12 vorgesehen. Diese ist diametral gegenüberliegend angeordnet. Selbstverständlich besteht die Möglichkeit, beispielsweise drei oder vier Abflußleitungen anzuordnen. Damit ist gewährleistet, daß die im Sammelraum 7 befindliche Flüssigkeit in nahezu jeder aus der Horizontalen abweichenden Lage aus dem Ölabscheider abfließt.A further drain line 12 is provided parallel to the first drain line 8. This is arranged diametrically opposite. Of course, there is the possibility, for example, to arrange three or four drain lines. This ensures that the liquid in the collecting space 7 differs from the horizontal in almost every one Layer flows out of the oil separator.

Sämtliche Abflußleitungen münden in eine gemeinsame Abflußleitung 13, die - wie bereits erwähnt - mit einem Schlauch 11 verbunden sein kann.All drain lines open into a common drain line 13, which - as already mentioned - can be connected to a hose 11.

In dem Ölabscheider ist ein Ventil 14 angeordnet, welches den vom Saugrohr rückwirkenden Unterdruck begrenzt. Dieses Ventil besteht aus einem Ventilsitz 15, einem gummielastischen Element 16 sowie einer Feder 17. Bei sehr hohem Unterdruck in der Absaugleitung 5 wird entgegen der Federkraft der Feder 17 das Ventilelement 16 nach unten bewegt und verschließt bzw. reduziert den Durchtrittsquerschnitt des Ölabscheiders, so daß ein unzulässig hoher Unterdruck sich nicht bis in das Kurbelgehäuse fortsetzen kann.A valve 14 is arranged in the oil separator, which limits the negative pressure which reacts from the suction pipe. This valve consists of a valve seat 15, a rubber-elastic element 16 and a spring 17. At very high negative pressure in the suction line 5, the valve element 16 is moved downward against the spring force of the spring 17 and closes or reduces the passage cross section of the oil separator, so that an impermissibly high negative pressure cannot continue into the crankcase.

Im Deckel 18 des Ölabscheiders ist ein Membranentlüftungsventil 19 angeordnet. Dieses Ventil hat die Aufgabe, den oberhalb der Membran 16 befindlichen Raum zu ent- bzw. belüften.A membrane vent valve 19 is arranged in the cover 18 of the oil separator. This valve has the task of venting or venting the space located above the membrane 16.

Claims (4)

Kurbelgehäuseentlüftung für Brennkraftmaschinen, umfassend eine vom Kurbelgehäuse ausgehende Entlüftungsleitung, einen darin angeordneten Flüssigkeitsabscheider, einen Sammelraum für die abgeschiedene Flüssigkeit mit einem Auslaß sowie eine zur Ansaugleitung der Brennkraftmaschine führende Verbindung, dadurch gekennzeichnet, daß ein weiterer Auslaß (12) vorgesehen ist, der dem ersten Auslaß (8) diametral gegenübersteht.Crankcase ventilation for internal combustion engines, comprising a ventilation line starting from the crankcase, a liquid separator arranged therein, a collecting space for the separated liquid with an outlet and a connection leading to the intake line of the internal combustion engine, characterized in that a further outlet (12) is provided, which is the first Outlet (8) faces diametrically. Kurbelgehäuseentlüftung für Brennkraftmaschinen, umfassend eine vom Kurbelgehäuse ausgehende Entlüftungsleitung, einen darin angeordneten Flüssigkeitsabscheider, einen Sammelraum für die abgeschiedene Flüssigkeit mit einem Auslaß sowie eine zur Ansaugleitung der Brennkraftmaschine führende Verbindung, dadurch gekennzeichnet, daß wenigstens zwei weitere Auslaßöffnungen (12) vorgesehen sind, die an verschiedenen Positionen des Sammelraums (7) angeordnet sind.Crankcase ventilation for internal combustion engines, comprising a ventilation line extending from the crankcase, a liquid separator arranged therein, a collecting space for the separated liquid with an outlet and a connection leading to the intake line of the internal combustion engine, characterized in that at least two further outlet openings (12) are provided, which are connected to different positions of the collecting space (7) are arranged. Kurbelgehäuseentlüftung nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß die Auslaßleitungen (8, 12) in eine gemeinsame Abflußleitung (13) münden.Crankcase ventilation according to one of the preceding claims, characterized in that the outlet lines (8, 12) open into a common drain line (13). Kurbelgehäuseentlüftung nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß der Sammelraum (7) eine ringförmige Rinne aufweist und die Abflußleitungen (8, 12) mit Auslauföffnungen der ringförmigen Rinne verbunden sind.Crankcase ventilation according to one of the preceding claims, characterized in that the collecting space (7) has an annular groove and the drain lines (8, 12) are connected to outlet openings of the annular groove.
EP95107896A 1994-07-02 1995-05-24 Crankcase ventilation for internal combustion engines Ceased EP0690209A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9410668U DE9410668U1 (en) 1994-07-02 1994-07-02 Crankcase for internal combustion engines
DE9410668U 1994-07-02

Publications (1)

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EP0690209A1 true EP0690209A1 (en) 1996-01-03

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EP95107896A Ceased EP0690209A1 (en) 1994-07-02 1995-05-24 Crankcase ventilation for internal combustion engines

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US (1) US5579744A (en)
EP (1) EP0690209A1 (en)
JP (1) JPH08170515A (en)
CN (1) CN1115828A (en)
BR (1) BR9502289A (en)
CA (1) CA2153027A1 (en)
CZ (1) CZ149995A3 (en)
DE (1) DE9410668U1 (en)
FI (1) FI953020A (en)
NO (1) NO951906L (en)
PL (1) PL309457A1 (en)
YU (1) YU44295A (en)
ZA (1) ZA955001B (en)

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Publication number Publication date
PL309457A1 (en) 1996-01-08
CN1115828A (en) 1996-01-31
US5579744A (en) 1996-12-03
JPH08170515A (en) 1996-07-02
DE9410668U1 (en) 1994-08-18
ZA955001B (en) 1996-02-09
FI953020A0 (en) 1995-06-19
FI953020A (en) 1996-01-03
CA2153027A1 (en) 1996-01-03
YU44295A (en) 1998-12-23
BR9502289A (en) 1996-06-18
NO951906L (en) 1996-01-03
CZ149995A3 (en) 1996-01-17
NO951906D0 (en) 1995-05-15

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