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EP1354129B1 - Oil separator - Google Patents

Oil separator Download PDF

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Publication number
EP1354129B1
EP1354129B1 EP02701206A EP02701206A EP1354129B1 EP 1354129 B1 EP1354129 B1 EP 1354129B1 EP 02701206 A EP02701206 A EP 02701206A EP 02701206 A EP02701206 A EP 02701206A EP 1354129 B1 EP1354129 B1 EP 1354129B1
Authority
EP
European Patent Office
Prior art keywords
filter disk
oil separator
crankcase
oil
shaft
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.)
Expired - Lifetime
Application number
EP02701206A
Other languages
German (de)
French (fr)
Other versions
EP1354129B8 (en
EP1354129A1 (en
Inventor
Erhard Keller
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.)
Senertec
Original Assignee
Senertec
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 Senertec filed Critical Senertec
Publication of EP1354129A1 publication Critical patent/EP1354129A1/en
Application granted granted Critical
Publication of EP1354129B1 publication Critical patent/EP1354129B1/en
Publication of EP1354129B8 publication Critical patent/EP1354129B8/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F01M2013/0438—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil with a filter
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S55/00—Gas separation
    • Y10S55/19—Crankcase ventilation

Definitions

  • the invention relates to a rotary oil separator for cleaning crankcase ventilation gases of an internal combustion engine.
  • crankcase ventilation gas In all internal combustion engines, oil droplets and oil aerosols are part of the blow-by gases from the crankcase ventilation. When these oil-containing gases are introduced into the intake area of the engine, contamination occurs in the downstream components, which adversely affects the function of the engine components. The entrained oil must therefore be removed from the crankcase ventilation gas.
  • crankcase gases oil separation from the crankcase gases is accomplished by means of separators consisting of a knitted fabric of fibers or by means of beam deflections on impact plates or a combination of these methods.
  • separators consisting of a knitted fabric of fibers or by means of beam deflections on impact plates or a combination of these methods.
  • ultrafine filters are used, but they work with a high differential pressure.
  • Cyclone separators require a relatively large installation space and, in principle, operate optimally only at one operating point.
  • Elecrostatic filters require additional electrical power consumption and are relatively expensive.
  • Rotary oil separators in which the oil droplets are ejected by means of paddle wheels, are also known. They are usually powered by electric motors, air turbines or oil pressure turbines.
  • the invention has for its object to provide an oil separator, which ensures almost complete separation of oil from the crankcase ventilation gases under all operating conditions and low differential pressure and can be produced inexpensively.
  • a filter disk is attached to a shaft located in the crankcase such that the crankcase gases must pass through this filter disk.
  • the oil and soot particles deposited on the surface and on the way through the filter disk are spun off through the rotating disk and remain in the crankcase, so that no oil collecting space and no special oil return are required.
  • the self-cleaning power of the rotating filter disk is so great that the differential pressure of the filter does not change significantly even with long running times.
  • a particularly advantageous use of a rotating filter disk provided for the flow through of the gases to be cleaned consists in the separation of oil droplets and oil aerosols from gases of a crankcase ventilation of an internal combustion engine.
  • a filter disk is able to withstand changing load conditions of the internal combustion engine and to permanently clean itself. Therefore, the separation of the oil droplets and oil aerosols from the gases of the crankcase ventilation is virtually maintenance-free. Soot particles are also thrown off the filter disc.
  • the invention allows numerous embodiments. To further clarify its basic principle, one of them is shown in the drawing and will be described below.
  • This shows in a single figure, a filter disk 1 which is mounted on a shaft 2 in the crankcase chamber 5 of an internal combustion engine, not shown.
  • the flow direction of the crankcase ventilation gases is indicated by arrows.
  • the housing bushing 3 is sealed in the crankcase wall 4 and touched with its front side, the filter disk 1.
  • the housing bushing 3 is provided with a drip edge 6, so that when the engine is stopped, the running of the crankcase wall 4 oil does not reach the filter disk 1.

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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)
  • Fats And Perfumes (AREA)

Abstract

An oil separator for use in the crankcase of an internal combustion engine. A rotatable shaft is located in the crankcase and a case lead-in is sealably fixed to the crankcase and concentric to the shaft. A flat filter disk has one face which abuts the case lead-in and an opposite face which is directly secured to the shaft, so that the filter disk rotates with the shaft. Crankcase gasses flow through the filter disk and the filtered gas flows out an opening defined by the case lead-in. The case lead-in may have a flange secured to a connecting piece which passes through a crankcase wall. A draining edge on the outer surface of the case-lead-in prevents oil from contacting the filter when the shaft is at rest.

Description

Die Erfindung betrifft einen rotatorisch arbeitenden Ölabscheider zur Reinigung von Kurbelgehäuseentlüftungsgasen einer Brennkraftmaschine.The invention relates to a rotary oil separator for cleaning crankcase ventilation gases of an internal combustion engine.

Bei allen Verbrennungsmotoren sind Öltröpfchen und Ölaerosole Bestandteil der Blow-by-Gase aus der Kurbelgehäuseentlüftung. Bei der Einleitung dieser ölhaltigen Gase in den Ansaugbereich des Motors treten Verschmutzungen in den nachfolgenden Bauteilen auf, die sich nachteilig auf die Funktion der Motorbauteile auswirken. Aus dem Kurbelgehäuseentlüftungsgas muss deshalb das mitgeführte Öl entfernt werden.In all internal combustion engines, oil droplets and oil aerosols are part of the blow-by gases from the crankcase ventilation. When these oil-containing gases are introduced into the intake area of the engine, contamination occurs in the downstream components, which adversely affects the function of the engine components. The entrained oil must therefore be removed from the crankcase ventilation gas.

Meist erfolgt die Ölabscheidung aus den Kurbelgehäusegasen mit Hilfe von Abscheidern, die aus einem Gewirk von Fasern bestehen oder mit Hilfe von Strahlablenkungen an Prallplatten oder einer Kombination dieser Verfahren. Daneben kommen Feinstfilter zum Einsatz, die jedoch mit einem hohen Differenzdruck arbeiten.Mostly, oil separation from the crankcase gases is accomplished by means of separators consisting of a knitted fabric of fibers or by means of beam deflections on impact plates or a combination of these methods. In addition, ultrafine filters are used, but they work with a high differential pressure.

Zyklonabscheider benötigen einen relativ großen Einbauraum und arbeiten prinzipbedingt nur in einem Betriebspunkt optimal.Cyclone separators require a relatively large installation space and, in principle, operate optimally only at one operating point.

Elekrostatische Filter erfordern eine zusätzliche elektrische Leistungsaufnahme und sind relativ kostenintensiv.Elecrostatic filters require additional electrical power consumption and are relatively expensive.

Zudem können diese Filter bei brennbaren Gasen nicht eingesetzt werden. Rotatorisch arbeitende Ölabscheider, in denen die Öltröpfchen mit Hilfe von Schaufelrädern ausgeschleudert werden, sind ebenfalls bekannt. Sie werden meist mit Elektromotoren, Luftdruckturbinen oder Öldruckturbinen angetrieben.In addition, these filters can not be used with combustible gases. Rotary oil separators, in which the oil droplets are ejected by means of paddle wheels, are also known. They are usually powered by electric motors, air turbines or oil pressure turbines.

Die optimale Auslegung der üblicherweise eingesetzten Ölabscheider bereitet erhebliche Probleme, weil der Ölabscheidegrad und der sich einstellende Differenzdruck vom Ölgehalt, von der Öltemperatur, von der Tröpfchengrößenverteilung, vom Blow-by-Gasstrom, von der pulsierenden Strömung, von der Motordrehzahl und der Motorbelastung, von plötzlichen Drehzahl- und Laständerungen etc. abhängt. Deswegen werden vor den eigentlichen Ölabscheidern noch Beruhigungsräume und Vorabscheider eingesetzt, die zusätzlichen Bauraum benötigen und zusätzliche Kosten verursachen. Weiterer Aufwand entsteht noch durch Ölsammelbehälter, Rückführventile und Ölrückführleitungen zum Ölsumpf des Motors.The optimal design of the commonly used oil separator causes considerable problems because the Ölabscheidegrad and the resulting differential pressure from the oil content, the oil temperature, the droplet size distribution, the blow-by gas flow, the pulsating flow, the engine speed and the engine load of sudden speed and load changes, etc. depends. Therefore, before the actual oil separators still calming rooms and pre-separator are used, which require additional space and incur additional costs. Further expense is still due to oil sump, return valves and oil return lines to the oil sump of the engine.

Aus der US 4,755,103 A ist eine Gasturbine bekannt geworden, bei der ein scheibenförmiger Ölabscheider von radial außen nach radial innen durchströmt wird. Der Ölabscheider ist an seinem äußeren Rand und in seinem Zentrum gegenüber angrenzenden Bauteilen abgedichtet.From the US 4,755,103 A a gas turbine has become known in which a disk-shaped oil separator is flowed through from radially outside to radially inside. The oil separator is sealed at its outer edge and in its center opposite adjacent components.

Aus der DE 43 30 912 A1 ist eine Dunstabscheideeinrichtung bekannt geworden, bei der ein Rotationskörper mit einer Filterfüllung versehen ist. Dunstbildende Teilchen sollen durch Einwirkung der Fliehkraft in Radialrichtung von dem Rotationskörper abgeschleudert werden. Diese Dunstabscheideeinrichtung erfordert jedoch einen Sammelbehälter und Ablenkrippen für die dunstbildenden Teilchen und ist daher nicht für die Reinigung von Blow-by-Gasen geeignet. Weiterhin ist der Rotationskörper zusammen mit einem Antriebsmotor innerhalb eines Gehäuses angeordnet, was zu großen Abmessungen der Dunstabscheideeinrichtung führt.From the DE 43 30 912 A1 is a Dunstabscheideeinrichtung known, in which a rotary body is provided with a filter filling. Haze-forming particles are to be thrown off the rotating body in the radial direction by the action of the centrifugal force. However, this mist eliminator requires a sump and baffles for the haze forming particles and is therefore not suitable for the purification of blow-by gases. Furthermore, the rotation body is together with a drive motor disposed within a housing, resulting in large dimensions of the Dunstabscheideeinrichtung.

Aus der DE 196 37 431 A1 ist eine Reinigungsvorrichtung bekannt geworden, bei der eine Luftströmung mit Feststoffpartikeln durch eine rotierende Lochscheibe geführt wird. Die Feststoffpartikel sollen von der Lochscheibe erfasst und radial nach außen geschleudert werden. Diese Reinigungsvorrichtung ist jedoch nicht zur Trennung von flüssigen Stoffen, wie Öltröpfchen oder Ölaerosolen, von Luft geeignet.From the DE 196 37 431 A1 is a cleaning device has become known in which an air flow with solid particles is guided through a rotating perforated disc. The solid particles should be captured by the perforated disc and thrown radially outward. However, this cleaning device is not suitable for the separation of liquids, such as oil droplets or oil aerosols, from air.

Der Erfindung liegt die Aufgabe zugrunde, einen Ölabscheider zu schaffen, der unter allen vorkommenden Betriebsbedingungen und bei geringem Differenzdruck eine nahezu vollständige Ölabscheidung aus den Kurbelgehäuseentlüftungsgasen gewährleistet und dabei kostengünstig hergestellt werden kann.The invention has for its object to provide an oil separator, which ensures almost complete separation of oil from the crankcase ventilation gases under all operating conditions and low differential pressure and can be produced inexpensively.

Erfindungsgemäß wird diese Aufgabe durch die Merkmale des Anspruchs 1 gelöst.According to the invention, this object is solved by the features of claim 1.

Hierdurch wird eine Filterscheibe an einer im Kurbelgehäuse befindlichen Welle derart befestigt, dass die Kurbelgehäusegase durch diese Filterscheibe hindurchtreten müssen. Die an der Oberfläche und auf dem Weg durch die Filterscheibe abgeschiedenen Öl- und Rußteilchen werden durch die sich drehende Scheibe abgeschleudert und verbleiben im Kurbelgehäuse, so dass kein Ölsammelraum und keine besondere Ölrückführung erforderlich sind. Die Selbstreinigungskraft der sich drehenden Filterscheibe ist so groß, dass sich der Differenzdruck des Filters auch bei langen Laufzeiten nicht wesentlich verändert.As a result, a filter disk is attached to a shaft located in the crankcase such that the crankcase gases must pass through this filter disk. The oil and soot particles deposited on the surface and on the way through the filter disk are spun off through the rotating disk and remain in the crankcase, so that no oil collecting space and no special oil return are required. The self-cleaning power of the rotating filter disk is so great that the differential pressure of the filter does not change significantly even with long running times.

Weitere Merkmale und Voreile der Erfindung sind Bestandteil der Unteransprüche sowie der Beschreibung eines Ausführungsbeispiels und der zugehörigen Zeichnungsfigur.Further features and advantages of the invention are part of the dependent claims and the description of an embodiment and the accompanying drawing figure.

Besonders kostengünstig gestaltet sich ein zum Einsatz in Kurbelgehäuseentlüftungen einer Brennkraftmaschine vorgesehener Ölabscheider mit einer zur Durchströmung von den zu reinigenden Gasen vorgesehenen Filterscheibe, wenn die Filterscheibe gemäß Anspruch 7 auf einer Nockenwelle, Ausgleichswelle oder Kurbelwelle der Brennkraftmaschine befestigt ist. Hierdurch erfordert der erfindungsgemäße Ölabscheider keinen aufwändigen Antrieb, da zumindest eine der genannten Wellen in Brennkraftmaschinen ohnehin vorhanden ist.Particularly cost-effective designed for use in crankcase ventilation of an internal combustion engine oil separator designed with a to the flow of the Filter disc provided for cleaning gases when the filter disc is fixed according to claim 7 on a camshaft, balance shaft or crankshaft of the internal combustion engine. As a result, the oil separator according to the invention requires no complex drive, since at least one of said waves is already present in internal combustion engines.

Eine besonders vorteilhafte Verwendung einer rotierenden, zur Durchströmung von den zu reinigenden Gasen vorgesehenen Filterscheibe besteht im Abscheiden von Öltröpfchen und Ölaerosolen aus Gasen einer Kurbelgehäuseentlüftung einer Brennkraftmaschine. Eine solche Filterscheibe vermag wechselnden Lastbedinungen der Brennkraftmaschine standzuhalten und sich dauerhaft selbst zu reinigen. Daher ist die Abscheidung der Öltröpfchen und Ölaerosolen aus den Gasen der Kurbelgehäuseentlüftung nahezu wartungsfrei. Rußteilchen werden von der Filterscheibe ebenfalls abgeschleudert.A particularly advantageous use of a rotating filter disk provided for the flow through of the gases to be cleaned consists in the separation of oil droplets and oil aerosols from gases of a crankcase ventilation of an internal combustion engine. Such a filter disk is able to withstand changing load conditions of the internal combustion engine and to permanently clean itself. Therefore, the separation of the oil droplets and oil aerosols from the gases of the crankcase ventilation is virtually maintenance-free. Soot particles are also thrown off the filter disc.

Die Erfindung lässt zahlreiche Ausführungsformen zu. Zur weiteren Verdeutlichung ihres Grundprinzips ist eine davon in der Zeichnung dargestellt und wird nachfolgend beschrieben. Diese zeigt in einer einzigen Figur eine Filterscheibe 1, die auf einer Welle 2 im Kurbelgehäuseraum 5 einer nicht näher dargestellten Brennkraftmaschine befestigt ist. Die Strömungsrichtung der Kurbelgehäuseentlüftungsgase ist durch Pfeile angegeben. Die Gehäusedurchführung 3 ist in der Kurbelgehäusewand 4 eingedichtet und berührt mit ihrer Stirnseite die Filterscheibe 1. Die Gehäusedurchführung 3 ist mit einer Abtropfkante 6 versehen, damit bei Stillstand des Motors das an der Kurbelgehäusewand 4 ablaufende Öl nicht an die Filterscheibe 1 gelangt.The invention allows numerous embodiments. To further clarify its basic principle, one of them is shown in the drawing and will be described below. This shows in a single figure, a filter disk 1 which is mounted on a shaft 2 in the crankcase chamber 5 of an internal combustion engine, not shown. The flow direction of the crankcase ventilation gases is indicated by arrows. The housing bushing 3 is sealed in the crankcase wall 4 and touched with its front side, the filter disk 1. The housing bushing 3 is provided with a drip edge 6, so that when the engine is stopped, the running of the crankcase wall 4 oil does not reach the filter disk 1.

Claims (8)

  1. Oil separator, provided particularly for use in crankcase breathers of an internal combustion engine, provided with a filter disk through which the gases to be purified flow, wherein means are provided for generating a rotary movement of the filter disk characterized in that an end face of the filter disk (1) abuts a projecting edge of a case lead-in (3).
  2. Oil separator according to claim 1, characterized in that the filter disk (1) is secured to a driven shaft (2).
  3. Oil separator according to claim 1 or 2, characterized in that the case lead-in (3) has a draining (6) near to its edge.
  4. Oil separator according to at least one of the preceding claims, characterized in that the filter disk (1) is made of a fibrous material.
  5. Oil separator according to at least one of the preceding claims, characterized in that the inner wall of the case lead-in (3) is funnel-shaped and is tapered towards an opening (7) .
  6. Oil separator according to at least one of the preceding claims, characterized in that the case lead-in (3) has a flange (8) with an adjacent connecting piece (9), and the connecting piece passes through a wall (4) of the case to be vented.
  7. An oil separator with a filter disk through which the gases to be purified flow provided for use in a crankcase breather, characterized in that the filter disk (1) is secured to a camshaft, differential shaft or crankshaft of the internal combustion engine.
  8. Use of a rotating filter disk according to claim 1 for separating oil droplets and oil aerosols of gases of a crankcase breather of an internal combustion engine.
EP02701206A 2001-01-23 2002-01-18 Oil separator Expired - Lifetime EP1354129B8 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10102809 2001-01-23
DE10102809A DE10102809A1 (en) 2001-01-23 2001-01-23 oil separator
PCT/DE2002/000149 WO2002059466A1 (en) 2001-01-23 2002-01-18 Oil separator

Publications (3)

Publication Number Publication Date
EP1354129A1 EP1354129A1 (en) 2003-10-22
EP1354129B1 true EP1354129B1 (en) 2007-09-26
EP1354129B8 EP1354129B8 (en) 2008-01-23

Family

ID=7671406

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02701206A Expired - Lifetime EP1354129B8 (en) 2001-01-23 2002-01-18 Oil separator

Country Status (6)

Country Link
US (1) US6814768B2 (en)
EP (1) EP1354129B8 (en)
AT (1) ATE374308T1 (en)
DE (3) DE10102809A1 (en)
ES (1) ES2292714T3 (en)
WO (1) WO2002059466A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10148000A1 (en) * 2001-09-28 2003-04-10 Rolls Royce Deutschland oil separator
DE10226695A1 (en) * 2002-06-15 2003-12-24 Daimler Chrysler Ag Centrifugal oil separator in a crankcase of an internal combustion engine
FR2850037B1 (en) * 2003-01-17 2006-07-28 Simon Francois ROTARY MACHINE FOR GENERATING AN ADJUSTABLE FLUID FLOW AND CAPABLE OF CLEANING
US7285149B2 (en) * 2003-10-31 2007-10-23 Bendix Commercial Vehicle Systems Llc Oil separator for vehicle air system
DE102004048539A1 (en) * 2004-10-06 2006-04-13 Deutz Ag Oil separator for removing oil from crank housing ventilation gases from internal combustion engine has gases passing through separator body axially parallel to rotational axis and out through openings in circumferential face of separator
FR2886926B1 (en) * 2005-06-10 2007-08-31 Rexam Dispensing Systems Sas AIR FILTRATION DEVICE FOR LIQUID OR SEMI-LIQUID PRODUCT PUMP
DE102005034273A1 (en) * 2005-07-22 2006-06-14 Daimlerchrysler Ag Combustion engine e.g. for motor vehicle, has two cam shafts in cylinder head with first cam shaft having longitudinal bore hole for conveying Blow-By-Gas and oil separating device provided
NO330124B1 (en) * 2009-06-11 2011-02-21 Ntnu Tech Transfer As A separator for a gas / liquid stream
PH12014500267A1 (en) * 2011-11-29 2022-05-11 Xingyue Group Co Ltd Handheld four-stroke engine lubricating system
CN108678837A (en) * 2018-06-22 2018-10-19 涂攸静 Gs-oil separator

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US3708957A (en) * 1971-02-19 1973-01-09 Farr Co Exhaust filter unit and method of filtering exhaust
GB1508212A (en) * 1975-02-10 1978-04-19 Rolls Royce Apparatus for separating suspension of liquids in gas
JPS5392973A (en) * 1977-01-26 1978-08-15 Sanetsu Kk Oil mist remover
DE3535107A1 (en) 1985-10-02 1987-04-09 Mtu Muenchen Gmbh WAREHOUSE SUPPLY SYSTEM
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EP0306277A1 (en) * 1987-08-31 1989-03-08 Tabai Espec Co., Ltd. Oil mist remover
DE4330912A1 (en) * 1993-09-11 1995-03-16 Karl Weber Maschinenbau Vapour-extracting and vapour-separating device
GB9320231D0 (en) * 1993-10-01 1993-11-17 Boc Group Plc Gas-liquid separation methods and apparatus
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US6139595A (en) * 1998-09-18 2000-10-31 Fleetguard, Inc. Air/oil coalescer with centrifugally assisted drainage

Also Published As

Publication number Publication date
ATE374308T1 (en) 2007-10-15
US20030136264A1 (en) 2003-07-24
EP1354129B8 (en) 2008-01-23
US6814768B2 (en) 2004-11-09
DE50210974D1 (en) 2007-11-08
DE10290230D2 (en) 2003-12-18
DE10102809A1 (en) 2002-08-14
EP1354129A1 (en) 2003-10-22
ES2292714T3 (en) 2008-03-16
WO2002059466A1 (en) 2002-08-01

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