WO2015018691A1 - Séparateur de brouillards d'huile - Google Patents

Séparateur de brouillards d'huile Download PDF

Info

Publication number
WO2015018691A1
WO2015018691A1 PCT/EP2014/066230 EP2014066230W WO2015018691A1 WO 2015018691 A1 WO2015018691 A1 WO 2015018691A1 EP 2014066230 W EP2014066230 W EP 2014066230W WO 2015018691 A1 WO2015018691 A1 WO 2015018691A1
Authority
WO
WIPO (PCT)
Prior art keywords
oil mist
mist separator
oil
separator
dispersion medium
Prior art date
Application number
PCT/EP2014/066230
Other languages
German (de)
English (en)
Inventor
Dimitri An
Niklas Kull
Yakup ÖZKAYA
Stefan Ruppel
Original Assignee
Mahle International 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 Mahle International Gmbh filed Critical Mahle International Gmbh
Publication of WO2015018691A1 publication Critical patent/WO2015018691A1/fr

Links

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
    • F01M13/0416—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil arranged in valve-covers
    • 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
    • F01M2013/026—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure with pumps sucking air or blow-by gases from the crankcase
    • 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
    • F01M2013/0433—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil with a deflection device, e.g. screen
    • 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

Definitions

  • the invention relates to an oil mist separator according to the preamble of claim 1.
  • the invention further relates to a corresponding internal combustion engine.
  • blow-by The gas which strikes the engine room during compression in an internal combustion engine or piston compressor on the piston rings from the working space is known to the person skilled in the art as blow-by or blow-by.
  • blowby fraction amounts to about 0.5% to 2% of the total gas volume.
  • blow-by gas In addition to the pollutants typical of combustion gases, engine oil particles are also entrained in the venting of the crankcase.
  • the introduction of blow-by gas into the intake tract thus threatens a heavy contamination of the throttle flap, turbocharger (ATL), valves and other components of the intake tract.
  • ATL and intercooler can suffer in this way performance degradation and interference.
  • Another unexpected The desired side effect of the blowby can be seen in the entrainment of unburned fuel residues, which cause a possible dilution of the engine oil, in particular during a cold start.
  • so-called oil separators or oil mist are known in the exhaust gas purification technology to clean the blown off from the crankcase Blowby fine oil drops and other entrained aerosols and to avoid in this way contamination of engine components and malfunctions.
  • Generic oil mist separators are designed, for example, as impact precipitators or, in the case of increased power requirements, as centrifugal separators.
  • EP 2021592 B1 discloses a vent for a crankcase, which in particular comprises a generic oil mist separator designed as a baffle separator.
  • the effectiveness of the separation process used is referred to in the present context as the degree of separation or degree of separation.
  • As a yardstick may serve the ratio of deposited by the Olnebelabscheider to the occurred in the Olnebelabscheider liquid amount or concentration.
  • the object of the invention is to provide an oil mist separator which, taking into account suitable framework conditions with respect to its size and complexity, has an improved separation efficiency. This object is achieved by a Olnebelabscheider with the features of claim 1.
  • the invention is therefore based on the idea of increasing the differential pressure between the aerosol of blow-by and oil particles introduced into the oil mist separator on the one hand and the dispersion medium remaining after the precipitation on the other hand.
  • the volume flow in the region of the inlet can be increased, so that when it flows through an oil separation unit arranged in the oil mist separator, the dispersed oil droplets absorb a larger amount of kinetic energy.
  • the dispersed oil droplets absorb a larger amount of kinetic energy.
  • acts on the individual oil particles an increased inertial force, which leads to the adhesion of an increased number of particles on the particle collecting container and thus to an overall improved degree of separation at the ⁇ labscheide- unit.
  • a flow path extending between the inlet opening and the outlet opening is connected to an additional pressure source.
  • This pressure source is formed as a negative pressure source, with respect to the ⁇ labscheideech downstream connection.
  • the pressure source is designed as a pressure source.
  • the differential pressures in crankcase vents are about 20 hPa. This value is set in particular by pressure control valves.
  • differential pressures of up to 80hPa can be generated.
  • the additionally available differential pressure which can thus be up to 60 hPa, is available to the oil mist separator for an improved separation result.
  • An oil mist separator adapted in the manner described can preferably be designed as a baffle separator having a suitable number of nozzles in fluid communication with the inlet opening.
  • Such an embodiment has the advantage of low structural complexity and size, since by means of an easy to implement deflection of the dispersion medium, the inertia force of the oil particles can be used to effect their settling on a suitably arranged baffle plate of the particle catcher.
  • the differential pressure can be advantageously increased by an embodiment of the baffle having two, three or four nozzles.
  • the gas volume flowing through the nozzles is distributed over a reduced overall cross-sectional area of the nozzles, which in turn leads to an increased volume flow with the described positive effects.
  • a comparable result can be achieved by reducing the cross-sectional area of individual or all nozzles, as an alternative or in addition to the aforementioned measure with regard to the number of nozzles.
  • An area between 6.3 mm 2 and 12.6 mm 2 proves to be particularly advantageous in this context.
  • annular arrangement is recommended, so that the nozzles can wet the largest possible area of the impact plate.
  • the expansion of this area allows the settling oil drops to gradually reduce their flow rate within the particulate collection vessel such that the proportion of entrained particulate matter in the direction of the exit orifice is minimized, again benefiting the overall device separation efficiency.
  • a circular design also serves the same.
  • a suitable opening can be provided near the center of the circular shape, which allows a controlled flow of the separated oil in the direction of the drain.
  • ⁇ lnebelabscheiders which includes an externally driven turbomachine in addition to the components mentioned.
  • This component makes it possible to cover the increased energy requirement of the oil mist separator in view of the increased differential pressure by supplying additional kinetic energy to the dispersion medium. In this way, with regard to the differential pressure, work areas of the oil mist separator can be opened up, which can not be readily realized by means of the kinetic energy inherent in the aerosol introduced.
  • the turbomachine is to think of a configuration as a vacuum, in particular as a jet pump. Due to the considerable versatility of movable components, this embodiment proves to be particularly simple, robust and potentially maintenance and wear. Given the simple geometry and low mechanical stress, the proposed variant also allows the use of thermally and chemically resistant ger Spezialtechnik, as they are familiar to the expert in the field of pumping technology. As an alternative to generating a sufficient volume flow at comparatively low power consumption, the turbomachine can be realized in the form of a fan.
  • a controlled outflow of the collected oil droplets also favors a design of the oil mist separator in the form of a filtering separator with a filter fleece, whose serving as a support filter bed for the discharge of separated oil is optimized.
  • this arrangement makes it possible to achieve a constantly high, defined degree of separation of the oil mist separator.
  • a filtering separator When used for venting an internal combustion engine, a filtering separator also has the advantage, in the case of a specific design, of a performance which is largely independent of the operating state of the engine and uniform over the entire service life of the filter.
  • a design simplification and compact construction can be achieved by integrally forming the oil mist separator with a cylinder head cover of the engine. If the crankcase is connected by means of a vent line to the inlet opening of the oil mist separator, the result is an efficient venting of the crankcase with a small space requirement.
  • the turbomachine in particular the fan, is integtiert in the cylinder head cover.
  • a bearing may be provided in the cylinder head cover into which the turbomachine is inserted and fixed with a cover.
  • Figure 1 is a partial view of a cylinder head cover with a Olnebelabscheider invention
  • FIG. 2 is a sectional view of the cylinder head cover according to FIG.
  • FIG. 1 A first figure.
  • the oil mist separator illustrated in FIG. 1 is composed of a coarse separator 10 and a fine separator 1 1 in fluid communication therewith, which are formed on a cylinder head cover 17.
  • This cylinder head cover 17 forms the outer cover of a cylinder head, which limits the combustion space (not shown) of the designed as a reciprocating engine internal combustion engine 18 in the direction of movement of its oscillating piston.
  • Any other components of the cylinder head, depending on the type and Model of the internal combustion engine 18, for example, inlet and outlet ports and valve control for the gas exchange operations, oil passages for the lubrication of the valve train, coolant passages, spark plugs, injectors or nozzles and glow plugs may include, are not shown for reasons of simplicity.
  • the oil mist separator 10, 1 1 forms part of the ventilation system of a crankcase for the storage of the crankshaft of the internal combustion engine 18 which is fluidly connected via a substantially gas-tight vent line with an opening 12 provided on the coarse separator 10.
  • a substantially gas-tight vent line with an opening 12 provided on the coarse separator 10.
  • the described dispersion thus has the chemical properties of an aerosol whose engine oil concentration depends strongly on the medium pressure, the mutual pairing of cylinder, piston ring and bushing and the connection point of the vent line to the crankcase of the internal combustion engine 18.
  • the oil mist separator 10, 1 1 is designed as a inertial or impact separator. As such, the oil mist separator 10, 1 1 by means of a manifold or a baffle plate, the aerosol such that its phases are pressed according to their respective inertia different degrees to the outside of the manifold or the surface of the baffle plate. Regardless of the specific motor vehicle technical meaning of the term in the sense of an intake or exhaust manifold is to be considered in this context as a manifold any pipe section, which causes a change in direction of the aerosol by its curved shape.
  • the higher density of the engine oil particles compared to acting as a dispersing Blowby causes a separation of the engine oil, which can be derived via a coarse separator 10 and fine separator 1 1 adjacent P sieauffangbe- container 13 and associated with the latter sequence 14 separated from the blowby from the crankcase ventilation system. From there, the engine oil can be fed via a return, not shown again an oil pan screwed to the crankcase of the engine running as a four-stroke engine 18, where it may once again serve to lubricate moving machine elements.
  • the blowby can be supplied via an outlet opening 15 provided for this purpose and an optional expansion valve approximately to an intake line of an exhaust gas turbocharger (ATL) of the internal combustion engine 18, thereby avoiding the emission of finer pollutant particles remaining.
  • ATL exhaust gas turbocharger
  • the relative arrangement of the fine separator 1 1, the coarse separator 12 and the turbomachine 16 can be modified in other embodiments, without departing from the scope of the invention.
  • the turbomachine 16 may follow directly in the flow direction of the aerosol to the inlet opening 12 or between coarse separator 10 and fine separator 1 1 may be provided.
  • An integral training of coarse the 10 and fine 1 1 is not contrary to the idea of the invention.
  • the cross-sectional view according to FIG. 2 shows the turbomachine 16 installed in the cylinder head cover 17 of FIG. 1 in detail.
  • this has the shape of a fan, which is protected by a solid shell in the form of a plastic housing 20.
  • a lower part of the plastic housing 20 is formed integrally with the cylinder head cover 17, while a cover 22 welded or mounted on the cylinder head cover 17 allows the possibility of exchanging or maintaining the turbomachine 16 as needed.
  • the turbomachine 16 provided with an optional control electronics can be attached to the middle part of the plastic housing 20 for this purpose by means of a fastening element 21 - in the present embodiment as part of a screw connection.
  • a corresponding bore in the region of a bearing 25 of the turbomachine 16 allows the production of a positive releasable connection in the context of manufacturing or maintenance.
  • the aforementioned bearing 25 of the turbomachine 16 in turn carries a fan wheel 24 acting, rotatable within the plastic housing 20 impeller, which sucks via a connected to the oil mist 10, 1 1 supply line 23 cleaned blowby from the direction of the fine separator 1 1.
  • the fan wheel 24 is substantially coaxially aligned with a bore 23 of the cylinder head cover 17 which connects the supply line 23 to the installation space of the turbomachine 16 and thus is oriented approximately parallel to the flow direction of the blowby.
  • a shaft electric drive motor 26 which in the form of an external rotor as an electric a commutated DC motor comprises a plurality of alternately radially aligned annularly arranged permanent magnets or a corresponding multi-pole magnetized ring.
  • the person skilled in the art is also familiar with this type of electric motor as a brushless DC motor, BLDC motor, BL motor or EC motor. If the internal combustion engine 18 is used to drive a motor vehicle with an electrical vehicle electrical system, then the latter can be used in an advantageous manner for supplying energy to the electric motor 26.

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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

L'invention concerne un séparateur de brouillards d'huile (10, 11) qui comprend un orifice d'entrée (12) servant à introduire dans le séparateur de brouillards d'huile (10, 11) un aérosol contenant un milieu de dispersion gazeux, en particulier un gaz de carter, et de l'huile dispersée dans le milieu de dispersion; un récipient collecteur de particules (13) servant à collecter l'huile dispersée; un orifice d'évacuation (14) servant à évacuer l'huile collectée du séparateur de brouillards d'huile (10, 11); et un orifice de sortie (15) servant à évacuer le milieu de dispersion du séparateur de brouillards d'huile (10, 11), un trajet d'écoulement étant formé entre l'orifice d'entrée (12) et l'orifice de sortie (15). Un degré amélioré de séparation est obtenu lorsque le séparateur de brouillards d'huile (10, 11) comprend un dispositif servant à augmenter la différence de pression entre l'aérosol introduit et le milieu de dispersion évacué. L'augmentation de la différence de pression est effectuée par un raccordement du trajet d'écoulement à une source de pression supplémentaire. L'invention concerne en outre un couvre-culasse (17) et un moteur à combustion interne (18) équipé d'un séparateur de brouillards d'huile (10, 11) de ce type.
PCT/EP2014/066230 2013-08-07 2014-07-29 Séparateur de brouillards d'huile WO2015018691A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013215611.1A DE102013215611A1 (de) 2013-08-07 2013-08-07 Ölnebelabscheider
DE102013215611.1 2013-08-07

Publications (1)

Publication Number Publication Date
WO2015018691A1 true WO2015018691A1 (fr) 2015-02-12

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WO (1) WO2015018691A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016135072A1 (fr) * 2015-02-25 2016-09-01 Mahle International Gmbh Moteur à combustion interne
DE102015217153A1 (de) 2015-09-08 2017-03-09 Daimler Ag Zylinderkopfhaube und Verfahren zum Herstellen einer Zylinderkopfhaube
WO2020119869A1 (fr) * 2018-12-12 2020-06-18 Bühler Motor GmbH Circuit de protection d'un moteur électrique comprenant un enroulement monophasé, pompe centrifuge électrique et séparateur de brouillard d'huile comprenant un tel circuit de protection
WO2023180054A1 (fr) 2022-03-23 2023-09-28 Elringklinger Ag Couvercle de culasse destiné à un moteur à combustion interne

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018106881B4 (de) * 2018-03-22 2019-10-10 Bayerische Motoren Werke Aktiengesellschaft Absaugvorrichtung zur Kurbelgehäuseentlüftung

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DE10153120A1 (de) * 2001-03-07 2002-09-12 Hengst Walter Gmbh & Co Kg Einrichtung für die Entlüftung des Kurbelgehäuses einer Brennkraftmaschine
US20030213480A1 (en) * 2002-05-15 2003-11-20 Schueler Joshua D. Multi-orifice nozzle air evacuator assembly for a ventilation system of a diesel engine
DE20302824U1 (de) * 2003-02-21 2004-07-08 Hengst Gmbh & Co.Kg Ölabscheider für die Reinigung von Ölnebel enthaltendem Kurbelgehäuseentlüftungsgas einer Brennkraftmaschine
WO2007073320A1 (fr) * 2005-12-20 2007-06-28 3Nine Ab Dispositif de nettoyage des gaz de carter
DE102006024817A1 (de) * 2006-05-29 2007-12-06 Mahle International Gmbh Zylinderkopf eines Verbrennungsmotors
DE102006024816A1 (de) * 2006-05-29 2007-12-06 Mahle International Gmbh Einrichtung für die Entlüftung eines Kurbelgehäuses
JP2009121341A (ja) * 2007-11-14 2009-06-04 Toyota Boshoku Corp クランクルーム換気装置
DE102011005795A1 (de) * 2010-06-08 2011-12-08 Toyota Boshoku Kabushiki Kaisha Ölabscheider
WO2013017832A1 (fr) * 2011-07-29 2013-02-07 Parker Hannifin Manufacturing (Uk) Limited Séparateur

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CH664798A5 (de) * 1983-11-14 1988-03-31 Bbc Brown Boveri & Cie Vorrichtung zur rueckfuehrung der abblasemenge aus dem kurbelgehaeuse.
DE3604090A1 (de) * 1986-02-08 1987-02-26 Daimler Benz Ag Vorrichtung an einer aufgeladenen brennkraftmaschine zur rueckfuehrung von kurbelgehaeuseentlueftungsgasen in den verbrennungsraum der brennkraftmaschine
US6290738B1 (en) * 1999-07-16 2001-09-18 Nelson Industries, Inc. Inertial gas-liquid separator having an inertial collector spaced from a nozzle structure
DE102009032835B4 (de) * 2009-07-13 2014-12-18 Mann + Hummel Gmbh Vorrichtung für die Entlüftung von Kurbelgehäusegasen

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10153120A1 (de) * 2001-03-07 2002-09-12 Hengst Walter Gmbh & Co Kg Einrichtung für die Entlüftung des Kurbelgehäuses einer Brennkraftmaschine
US20030213480A1 (en) * 2002-05-15 2003-11-20 Schueler Joshua D. Multi-orifice nozzle air evacuator assembly for a ventilation system of a diesel engine
DE20302824U1 (de) * 2003-02-21 2004-07-08 Hengst Gmbh & Co.Kg Ölabscheider für die Reinigung von Ölnebel enthaltendem Kurbelgehäuseentlüftungsgas einer Brennkraftmaschine
WO2007073320A1 (fr) * 2005-12-20 2007-06-28 3Nine Ab Dispositif de nettoyage des gaz de carter
DE102006024817A1 (de) * 2006-05-29 2007-12-06 Mahle International Gmbh Zylinderkopf eines Verbrennungsmotors
DE102006024816A1 (de) * 2006-05-29 2007-12-06 Mahle International Gmbh Einrichtung für die Entlüftung eines Kurbelgehäuses
JP2009121341A (ja) * 2007-11-14 2009-06-04 Toyota Boshoku Corp クランクルーム換気装置
DE102011005795A1 (de) * 2010-06-08 2011-12-08 Toyota Boshoku Kabushiki Kaisha Ölabscheider
WO2013017832A1 (fr) * 2011-07-29 2013-02-07 Parker Hannifin Manufacturing (Uk) Limited Séparateur

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016135072A1 (fr) * 2015-02-25 2016-09-01 Mahle International Gmbh Moteur à combustion interne
DE102015203337B4 (de) 2015-02-25 2022-06-23 Mahle International Gmbh Brennkraftmaschine und Zylinderkopfhaube
DE102015217153A1 (de) 2015-09-08 2017-03-09 Daimler Ag Zylinderkopfhaube und Verfahren zum Herstellen einer Zylinderkopfhaube
US10550743B2 (en) 2015-09-08 2020-02-04 Elringklinger Ag Cylinder head cover and method for producing a cylinder head cover
WO2020119869A1 (fr) * 2018-12-12 2020-06-18 Bühler Motor GmbH Circuit de protection d'un moteur électrique comprenant un enroulement monophasé, pompe centrifuge électrique et séparateur de brouillard d'huile comprenant un tel circuit de protection
CN113169691A (zh) * 2018-12-12 2021-07-23 标立电机有限公司 具有单相绕组的电动马达的保护电路、具有这种保护电路的电离心泵和电油雾分离器
WO2023180054A1 (fr) 2022-03-23 2023-09-28 Elringklinger Ag Couvercle de culasse destiné à un moteur à combustion interne
DE102022106850A1 (de) 2022-03-23 2023-09-28 Elringklinger Ag Zylinderkopfhaube für einen Verbrennungsmotor

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