DE4101203A1 - Crankcase breather pipe for IC engine - has auxiliary pump to remove residual oil from trap - Google Patents

Crankcase breather pipe for IC engine - has auxiliary pump to remove residual oil from trap

Info

Publication number
DE4101203A1
DE4101203A1 DE19914101203 DE4101203A DE4101203A1 DE 4101203 A1 DE4101203 A1 DE 4101203A1 DE 19914101203 DE19914101203 DE 19914101203 DE 4101203 A DE4101203 A DE 4101203A DE 4101203 A1 DE4101203 A1 DE 4101203A1
Authority
DE
Germany
Prior art keywords
auxiliary pump
oil
internal combustion
combustion engine
trap
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.)
Withdrawn
Application number
DE19914101203
Other languages
German (de)
Inventor
Georg Novotny
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
Original Assignee
Bayerische Motoren Werke AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Priority to DE19914101203 priority Critical patent/DE4101203A1/en
Publication of DE4101203A1 publication Critical patent/DE4101203A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01MLUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00Crankcase ventilating or breathing
    • F01M13/04Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F01M13/0416Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil arranged in valve-covers

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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)

Abstract

The auxiliary pump (6) drains off any residual fluid (4) accumulating in the oil trap (2) in an IC engine. The oil may be returned to the sump or to an oil tank. In a pref. version the vacuum pump used, for instance, in a servo assisted braking system may in a vehicle fulfil this function. USE/ADVANTAG - Oil drain pump keeps trap clear of residual oil, thus preventing oil entering the exhaust pipe of a vehicle.

Description

Die Erfindung betrifft eine Kurbelgehäuseentlüftung einer Brennkraftmaschine mit einem Ölabscheider und einer Hilfspumpe.The invention relates to a crankcase ventilation Internal combustion engine with an oil separator and one Auxiliary pump.

Die gattungsbildende DE 36 04 090 A1 (F01M13/02) zeigt eine derartige Kurbelgehäuseentlüftung. Da es sich dort um eine aufgeladene Brennkraftmaschine handelt, dient die Hilfspumpe dort dazu, die sog. blow-by-Gase auch bei Saugrohrüberdruck in das Brennkraftmaschinen-Saugrohr einzuleiten. Nicht behandelt wird bei der bekannten Kur­ belgehäuseentlüftung jedoch das folgende Problem: Um den Schmierölverbrauch der Brennkraftmaschine gering zu halten, werden die blow-by-Gase vor ihrem Eintritt in das Brennkraftmaschinen-Saugrohr durch einen Ölabscheider geleitet. Dieser Ölabscheider ist geodätisch oberhalb des Brennkraftmaschinen-Ölreservoirs angeordnet, so daß das abgeschiedene Schmieröl alleine unter Schwerkrafteinfluß in das Schmierölreservoir zurückgelangt.The generic DE 36 04 090 A1 (F01M13 / 02) shows such a crankcase ventilation. Since it is there is a supercharged internal combustion engine, which serves Auxiliary pump there, the so-called blow-by gases Intake manifold overpressure in the internal combustion engine intake manifold initiate. Not treated at the well-known cure vent housing however the following problem: To keep the lubricating oil consumption of the internal combustion engine low to keep the blow-by gases from entering before the internal combustion engine intake manifold through an oil separator headed. This oil separator is geodetically above the Engine oil reservoirs arranged so that the separated lubricating oil only under the influence of gravity returned to the lubricating oil reservoir.

Unter anderem in Abhängigkeit von den baulichen Verhält­ nissen kann es jedoch vorkommen, daß geringe Mengen von Schmieröl bzw. abgeschiedenem Fluid im Ölabscheider ver­ bleiben. Bei hohem Unterdruck im Saugrohr der Brennkraft­ maschine und folglich auch im Ölabscheider können diese Fluidmengen dann in das Brennkraftmaschinen-Saugrohr ge­ langen. Hiergegen Abhilfemaßnahmen aufzuzeigen, ist Auf­ gabe der vorliegenden Erfindung.Among other things, depending on the structural conditions However, small amounts of Ver oil or separated fluid in the oil separator ver stay. With high vacuum in the intake manifold of the internal combustion engine  machine and consequently also in the oil separator Quantities of fluid then ge in the engine intake manifold long. To counteract remedial action is to the present invention.

Zur Lösung dieser Aufgabe ist eine Hilfspumpe zur Abfuhr des sich im Ölabscheider ansammelnden Fluids vorgesehen. Mit Hilfe dieser Hilfspumpe ist es möglich, das abge­ schiedene Fluid stets vollständig aus dem Ölabscheider zu entfernen, so daß ein unerwünschter Übertritt in das Brennkraftmaschinen-Saugrohr sicher ausgeschlossen ist.To solve this problem is an auxiliary pump for disposal of the fluid collecting in the oil separator. With the help of this auxiliary pump, it is possible to abge separated fluid always completely from the oil separator remove so that an undesirable transfer into the Internal combustion engine intake manifold is safely excluded.

Vorteilhafte Aus- und Weiterbildungen der Erfindung be­ schreiben die Unteransprüche.Advantageous training and further developments of the invention be write the subclaims.

So mündet die Hilfspumpe saugseitig bevorzugt im Öl­ abscheider und druckseitig bevorzugt im Ölreservoir der Brennkraftmaschine. Hierzu können zwischen der Hilfspumpe und den Mündungsstellen selbstverständlich entsprechende Leitungen vorgesehen sein. Vorgesehen sein kann desweite­ ren eine Schalteinheit, die die Hilfspumpe beispielsweise zeitlich gesteuert intervallmäßig ein- und ausschaltet, da ein kontinuierlicher Betrieb der Hilfspumpe oftmals nicht erforderlich ist.The auxiliary pump preferably ends in the oil on the suction side separator and pressure side preferred in the oil reservoir of the Internal combustion engine. You can do this between the auxiliary pump and of course corresponding to the muzzle points Lines may be provided. Can also be provided Ren a switching unit that the auxiliary pump, for example switches on and off at intervals, there is often continuous operation of the auxiliary pump is not required.

Besonders vorteilhaft ist es, die Hilfspumpe mit einer weiteren, ohnehin bereits vorhandenen und von der Brenn­ kraftmaschine angetriebenen Hilfspumpe zusammenzufassen. Neben einer mechanischen Koppelung ist dabei auch eine funktionale Koppelung möglich. So kann beispielsweise die bei qualitativ gesteuerten Brennkraftmaschinen üblicher­ weise vorhandene Vakuumpumpe zur Erzeugung eines ausrei­ chenden Unterdrucks beispielsweise für einen Fahrzeug- Bremskraftverstärker zugleich die Funktion der erfin­ dungsgemäßen Hilfspumpe übernehmen. Hierzu muß lediglich die Saugleitung der Pumpe an einer geeigneten Stelle mit dem Ölabscheider verbunden werden.It is particularly advantageous to use an auxiliary pump further, already existing and from the Brenn summarize engine-driven auxiliary pump. In addition to mechanical coupling, there is also one functional coupling possible. For example, the more common in qualitatively controlled internal combustion engines wise existing vacuum pump to generate a sufficient appropriate negative pressure, for example for a vehicle Brake booster also functions as the inventor take over the auxiliary pump according to the invention. To do this, only the suction line of the pump at a suitable location connected to the oil separator.

Im folgenden wird die Erfindung anhand eines lediglich prinzipiell dargestellten bevorzugten Ausführungsbei­ spiels näher beschrieben. Gezeigt ist ein in einer Brenn­ kraftmaschinen-Haube 1 integrierter Ölabscheider 2, der beispielsweise durch ein Labyrinth oder ein Drahtgestrick gebildet sein kann. In diesen Ölabscheider 2 werden die blow-by-Gase aus dem Kurbelgehäuse der nicht weiter dar­ gestellten Brennkraftmaschine eingeleitet und gelangen über einen Austrittskanal 3 zurück in das ebenfalls nicht gezeigte Brennkraftmaschinen-Saugrohr. Im Ölabscheider 2 sammelt sich an der tiefsten Stelle abgeschiedenes Fluid 4 an.In the following the invention is described in more detail with reference to a preferred embodiment example shown only in principle. Shown is an integrated in an internal combustion engine hood 1 oil separator 2 , which can be formed, for example, by a labyrinth or a wire mesh. In this oil separator 2 , the blow-by gases are introduced from the crankcase of the internal combustion engine, not shown, and pass via an outlet channel 3 back into the internal combustion engine intake manifold, also not shown. Separated fluid 4 collects at the deepest point in the oil separator 2 .

Um zu verhindern, daß eine Restmenge von im Ölabscheider befindlichen Fluid, das nicht über eine nicht gezeigte Rückführleitung in das Brennkraftmaschinen-Ölreservoir gelangt, über den Austrittskanal 3 in das Brennkraftma­ schinen-Ansaugrohr mitgerissen wird, ist ein (weiterer) an der tiefsten Stelle des Ölabscheiders 2 mündender Ab­ fuhrstutzen 5 vorgesehen, der über einen Schlauch 5′ mit der Saugseite einer Hilfspumpe 6 verbunden ist. Diese Hilfspumpe 6 ist bevorzugt eine von der Brennkraftma­ schine angetriebene Vakuum-Pumpe zur Erzeugung von Unter­ druck in einem Fahrzeug-Bremskraftverstärker. Hierzu ist der Unterdruckstutzen 7 der Hilfspumpe 6 mit dem nicht gezeigten Bremskraftverstärker verbunden. Die nicht ge­ zeigte Druckseite der Pumpe mündet wiederum im nicht ge­ zeigten Ölreservoir der Brennkraftmaschine, um das sich im Ölabscheider 2 ansammelnde Fluid 4 in den Schmieröl­ kreislauf der Brennkraftmaschine zurückzuführen.To prevent a residual amount of fluid in the oil separator, which does not get into the internal combustion engine oil reservoir via a return line (not shown), is entrained via the outlet duct 3 into the internal combustion engine intake pipe, another (at the lowest point of the From the oil separator 2 opening 5 is provided, which is connected via a hose 5 'to the suction side of an auxiliary pump 6 . This auxiliary pump 6 is preferably a vacuum pump driven by the internal combustion engine for generating negative pressure in a vehicle brake booster. For this purpose, the vacuum connection 7 of the auxiliary pump 6 is connected to the brake booster, not shown. The pressure side of the pump, not shown, in turn opens into the oil reservoir, not shown, of the internal combustion engine, in order to return the fluid 4 accumulating in the oil separator 2 into the lubricating oil circuit of the internal combustion engine.

Wie beschrieben, kann die Rückführung des Fluids 4 über den Abfuhrstutzen 5, den Schlauch 5′ und die Hilfspumpe 6 parallel zu einer weiteren Rückführleitung erfolgen, es ist aber auch möglich, das im Ölabscheider 2 abgeschie­ dene Fluid vollständig mittels einer Hilfspumpe in das Ölreservoir der Brennkraftmaschine zurückzuführen. Bei der beschriebenen Parallelschaltung der Hilfspumpe 6 zu einem weiteren (nicht gezeigten) Rückführkanal ist es je­ doch ausreichend, die Hilfspumpe 6 nur zeitweise zu betä­ tigen. Hierzu kann eine entsprechende Schalteinheit vor­ gesehen sein. Stets ist jedoch durch diese Hilfspumpe 6 sichergestellt, daß kein abgeschiedenes Fluid über den Austrittskanal 3 in das Ansaugsystem der Brennkraftma­ schine gelangen kann.As described, the return of the fluid 4 via the discharge nozzle 5 , the hose 5 'and the auxiliary pump 6 take place parallel to a further return line, but it is also possible that the fluid separated in the oil separator 2 is completely by means of an auxiliary pump in the oil reservoir Internal combustion engine attributed. In the described parallel connection of the auxiliary pump 6 to a further (not shown) return duct, it is sufficient, however, to actuate the auxiliary pump 6 only temporarily. For this purpose, a corresponding switching unit can be seen. However, this auxiliary pump 6 always ensures that no separated fluid can get into the intake system of the internal combustion engine via the outlet channel 3 .

Claims (4)

1. Kurbelgehäuseentlüftung einer Brennkraftmaschine mit einem Ölabscheider (2) und einer Hilfspumpe (6), dadurch gekennzeichnet, daß die Hilfspumpe (6) zur Abfuhr von sich im Ölabscheider ansammelndem Fluid (4) vorgesehen ist.1. crankcase ventilation of an internal combustion engine with an oil separator ( 2 ) and an auxiliary pump ( 6 ), characterized in that the auxiliary pump ( 6 ) is provided for removing fluid accumulating in the oil separator ( 4 ). 2. Kurbelgehäuseentlüftung nach Anspruch 1, dadurch gekennzeichnet, daß die Hilfspumpe (6) saug­ seitig im Ölabscheider (2) und druckseitig im Ölre­ servoir der Brennkraftmaschine mündet.2. Crankcase ventilation according to claim 1, characterized in that the auxiliary pump ( 6 ) opens on the suction side in the oil separator ( 2 ) and pressure side in the oil reservoir of the internal combustion engine. 3. Kurbelgehäuseentlüftung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Hilfspumpe (6) mit einer weiteren, von der Brennkraftmaschine angetrie­ benen Hilfspumpe zusammengefaßt ist.3. crankcase ventilation according to claim 1 or 2, characterized in that the auxiliary pump ( 6 ) is combined with a further auxiliary pump driven by the internal combustion engine. 4. Kurbelgehäuseentlüftung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß eine Schalteinheit für einen diskontinuierlichen Betrieb der Hilfspumpe (6) vorgesehen ist.4. crankcase ventilation according to one of claims 1 to 3, characterized in that a switching unit for intermittent operation of the auxiliary pump ( 6 ) is provided.
DE19914101203 1991-01-17 1991-01-17 Crankcase breather pipe for IC engine - has auxiliary pump to remove residual oil from trap Withdrawn DE4101203A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19914101203 DE4101203A1 (en) 1991-01-17 1991-01-17 Crankcase breather pipe for IC engine - has auxiliary pump to remove residual oil from trap

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19914101203 DE4101203A1 (en) 1991-01-17 1991-01-17 Crankcase breather pipe for IC engine - has auxiliary pump to remove residual oil from trap

Publications (1)

Publication Number Publication Date
DE4101203A1 true DE4101203A1 (en) 1992-07-23

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DE19914101203 Withdrawn DE4101203A1 (en) 1991-01-17 1991-01-17 Crankcase breather pipe for IC engine - has auxiliary pump to remove residual oil from trap

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19512001A1 (en) * 1995-03-31 1996-10-02 Hengst Walter Gmbh & Co Kg Oil separator from oil-gas mixture
EP0870908A1 (en) * 1997-04-11 1998-10-14 Daimler-Benz Aktiengesellschaft Crankcase ventilation system for internal combustion engine
DE10024769A1 (en) * 2000-05-19 2001-11-22 Volkswagen Ag Blow-by oil separation for internal combustion engines has suction side of vacuum pump connected through throttle to oil separator whilst delivery side is attached to engine block
DE202005018132U1 (en) * 2005-11-17 2007-03-29 Hengst Gmbh & Co.Kg Internal combustion engine with a device for separating oil from the crankcase ventilation gas
DE102007008672A1 (en) 2007-02-20 2008-09-04 Dichtungstechnik G. Bruss Gmbh & Co. Kg Cylinder head cover for an internal combustion engine
DE102008019293A1 (en) 2008-04-16 2009-10-22 Dichtungstechnik G. Bruss Gmbh & Co. Kg Device for returning oil separated from blow-by gases and collected in a collecting space
DE102014017864A1 (en) 2014-12-03 2016-06-09 Daimler Ag Oil separation device for a combustion engine

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2688316A (en) * 1946-11-01 1954-09-07 Gen Motors Corp Crankcase ventilation
DE3604090A1 (en) * 1986-02-08 1987-02-26 Daimler Benz Ag Device on a supercharged internal combustion engine for the return of crankcase breather gases into the combustion chamber of the internal combustion engine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2688316A (en) * 1946-11-01 1954-09-07 Gen Motors Corp Crankcase ventilation
DE3604090A1 (en) * 1986-02-08 1987-02-26 Daimler Benz Ag Device on a supercharged internal combustion engine for the return of crankcase breather gases into the combustion chamber of the internal combustion engine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19512001A1 (en) * 1995-03-31 1996-10-02 Hengst Walter Gmbh & Co Kg Oil separator from oil-gas mixture
EP0870908A1 (en) * 1997-04-11 1998-10-14 Daimler-Benz Aktiengesellschaft Crankcase ventilation system for internal combustion engine
DE10024769A1 (en) * 2000-05-19 2001-11-22 Volkswagen Ag Blow-by oil separation for internal combustion engines has suction side of vacuum pump connected through throttle to oil separator whilst delivery side is attached to engine block
DE202005018132U1 (en) * 2005-11-17 2007-03-29 Hengst Gmbh & Co.Kg Internal combustion engine with a device for separating oil from the crankcase ventilation gas
DE102007008672A1 (en) 2007-02-20 2008-09-04 Dichtungstechnik G. Bruss Gmbh & Co. Kg Cylinder head cover for an internal combustion engine
DE102008019293A1 (en) 2008-04-16 2009-10-22 Dichtungstechnik G. Bruss Gmbh & Co. Kg Device for returning oil separated from blow-by gases and collected in a collecting space
DE102014017864A1 (en) 2014-12-03 2016-06-09 Daimler Ag Oil separation device for a combustion engine

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