EP1399649B1 - Dispositif separateur d'huile pour gas de carter de vilebrequin dans un moteur a combustion interne - Google Patents

Dispositif separateur d'huile pour gas de carter de vilebrequin dans un moteur a combustion interne Download PDF

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Publication number
EP1399649B1
EP1399649B1 EP02729807A EP02729807A EP1399649B1 EP 1399649 B1 EP1399649 B1 EP 1399649B1 EP 02729807 A EP02729807 A EP 02729807A EP 02729807 A EP02729807 A EP 02729807A EP 1399649 B1 EP1399649 B1 EP 1399649B1
Authority
EP
European Patent Office
Prior art keywords
oil
separation device
separation apparatus
cylinder head
head cover
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
EP02729807A
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German (de)
English (en)
Other versions
EP1399649A1 (fr
Inventor
Juergen Stegmaier
Bruno Hezel
Dietmar Uhlenbrock
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1399649A1 publication Critical patent/EP1399649A1/fr
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Publication of EP1399649B1 publication Critical patent/EP1399649B1/fr
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
    • 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
    • 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
    • F01M2013/0461—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil with a labyrinth
    • 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
    • F01M2013/0488—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil with oil trap in the return conduit to the crankcase
    • F01M2013/0494—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil with oil trap in the return conduit to the crankcase using check valves

Definitions

  • the invention relates to an oil separation device for crankcase gases of an internal combustion engine, having a pre-separation device, a cyclone separation device, a fine separation device and possibly a valve device, which are provided in cascade on a cylinder head cover of the internal combustion engine.
  • the known solution is associated with a high integration effort in the structural placement of ⁇ labscheidekomponenten in the cylinder head cover. It is also associated with a very high height.
  • the respective integration is highly dependent on the respective predetermined and always different design of the cylinder head cover.
  • the present invention seeks to improve a generic ⁇ labscheidevorraum of the type mentioned in that it is structurally simplified and for a larger number of cylinder head cover designs can be used.
  • the components of the oil separation device outside the actual cylinder head cover.
  • the cylinder head cover can be mounted detached from components of the oil separator on the cylinder head to close the camshaft housing up. It can then or at a later date, the prefabricated assembly of ⁇ labscheidevorraum be attached.
  • the housing half shell which forms a housing for the oil separation device, an integrally manufactured plastic part, in particular an injection molded part, is.
  • the housing half shell should advantageously rather flat and elongated build.
  • a dimension of only about 295 x 60 x 70 mm (length x width x height) has been found sufficient; It was possible to deposit amounts of oil of 100 to 200 g / h.
  • non-generic modular designs of externally attached Zyklonabscheidevorraumen so far a much larger height of 175 mm and a length and width of 105 x 90 mm was required.
  • This peripheral end edge can be in an advantageous Way define a plant level, which then requires a corresponding planar design of the outside of the cylinder head cover in the mounting area for the oil separator.
  • a design of the housing half shell of the oil separation device with extending in the direction of the cylinder head cover shallssonnewandungen, ie with a substantially cup-shaped geometry allows in a particularly advantageous manner, the pre-assembly of all components in the protected and prefabricated housing, which then connected only over its peripheral edge with the outside of the cylinder head cover needs to be.
  • a bottom piece could close off the housing half shell of the assembly, in particular, except for inflow and return openings.
  • the attachment of the housing half-shell to the cylinder head cover can be realized laterally by the housing half-shell, in particular integrally formed on the housing half-eyelet eyelets are then advantageously penetrated by screws which are screwed into corresponding threaded openings in the top of the cylinder head cover. These threaded openings can in particular be formed by dome-shaped elevations on the outside of the cylinder head cover.
  • the eyelets are then reset in the mounting direction of the housing half shell behind the front edge of the housing half shell.
  • the dome-shaped elevations on the cylinder head cover outside then form mounting and centering aids when attaching and correctly positioning the pre-assembled module.
  • the eyelets can thereby form contact surfaces when tightening the screws, which ensure correct installation.
  • An attachment by means of plastic snap hook is conceivable and advantageous.
  • a recess in the form of a necessarily provided volume of the housing half-shell is provided between a housing region encompassing the fine-separating device and a housing region of the housing half-shell comprising the outlet and / or valve device, ie below the abovementioned overflow channel , in which engages a complementary shaped counter contour of the cylinder head cover top in the mounted state of the oil separation device.
  • the Zyklonabscheide comprises a helical flow path, which is formed by a helix with a cylindrical inner piece, which are mounted on the housing half shell, wherein the cylindrical inner piece defines an inner diameter D i of the helical flow path and is maintained in different diameter sizes.
  • this inventive concept protection is thus claimed for a system of an oil separation device with different helical flow paths, each having a different radial depth measured from the cylindrical inner piece to an outer diameter of the helical flow path, which is preferably formed by the housing half shell.
  • the flow passage is dimensioned such that the cylindrical inner piece has a diameter of about 8 mm and the outer diameter of the housing for the Zyklonabscheide observed with 51 mm at a helical pitch (pitch) of 13 mm is measured.
  • the inner diameter is about 18 mm, in order then to achieve due to the smaller flow cross section, an approximately equally high flow rate within the Zyklonabscheide observed.
  • an inner diameter of about 24 mm should be suitable, again at a helical height (pitch) of 13 mm and an outer diameter of 51 mm.
  • FIG. 1 shows a perspective view of an oil separator 2 designated overall by the reference numeral 2 and to be described in detail below in the installed state on the outside of a cylinder head cover of an internal combustion engine designated overall by the reference numeral 4.
  • FIGS. 3 and 4 show a perspective view of the oil separation device 2. Reference will now be made to FIG. 5, which is a partial schematic view of a sectional view of the oil separation device 2.
  • the oil separation device 2 comprises a housing half shell 6, which accommodates all components of the oil separation device 2.
  • the housing half-shell 6 is an integrally produced plastic injection-molded part, which comprises in the direction of the cylinder head cover 4 extended codessuitewandungen 8.
  • the peripheral side walls 8 start from an upper cover wall 10, wherein a plurality of cup-shaped housing portions 12, 14, 16 are formed.
  • the respective diagnosessuitewandungen 8 go into a frontal, circumferential edge 18, with which the housing half-shell 6 against an outer side 20 of the cylinder head cover 4 is sealingly applied.
  • the housing half-shell 6 can then be screwed to the outside 20 of the cylinder head cover 4 via screws 22 indicated in FIG. 5 and shown in FIGS. 1 to 4.
  • the peripheral end edge 18 forms or defines a contact plane 26.
  • the housing region 12 forms a substantially pot-shaped chamber, in which a pre-separation device 28 and a cyclone separation device 30 is provided.
  • a fine separator 32 is included in the adjoining cup-shaped housing portion 14, a fine separator 32 is included with a formed for example as a yarn package Feinabscheideön 34.
  • the relative to the housing portions 12, 14 less tall housing portion 16 includes a valve device 36 which releases an outlet 38 of the oil separation device 2 to the intake of the internal combustion engine, not shown, or closes and thus limits the pressure of the crankcase gases upwards.
  • the cascaded separation steps are designed as follows:
  • the pre-separation device 28 is above an inlet opening 40 for crankcase gases in the Cylinder head cover 4 is arranged and comprises, as shown in Figure 5, Strömungsleitwandungen 42, which cause a preferably multiple deflection of the flowing into the ⁇ labscheidevoriques 2 crankcase gases.
  • Strömungsleitwandungen 42 which cause a preferably multiple deflection of the flowing into the ⁇ labscheidevorides 2 crankcase gases.
  • a reflux opening 44 is provided for liquid deposited in this stage. From the reflux opening 44 at the bottom end of a Strömungsleitwandung 42, the separated liquid then drips downwards against the flow of the crankcase gas and thus passes directly back into the engine compartment below the cylinder head cover 4.
  • the flowing crankshaft gas into the cyclone separator 30 arranged cascaded below.
  • This comprises a helical flow path 46.
  • the helical flow path 46 is formed by a helix 48 having a central opening 50, through which a tubular or cylindrical inner piece 52 is inserted and connected substantially tightly to the helix 48.
  • the peripheral edges 54 of the coil 48 are substantially sealing against the inside of the diligentssuitewandept 8 of the housing half-shell 8.
  • the helical passages of the helix 48 and the housing half shell 6 the helical flow path 46 is formed or limited by the inner piece 52.
  • the liquid components in the helically flowing crankcase gas are deposited radially outward and flow down the helical path due to their gravitational force.
  • the radial depth of the helical flow path 46 can be varied. This can preferably be done by using different coils 48 with different radial depth, which is preferably by different sized Inner pieces 52 of the helix 48 is achieved with the outer diameter of the helix 48 remaining the same. In this way, by selecting and inserting different coils, a different flow cross-section for adaptation to different engines and applications with otherwise constant construction and dimensioning of the oil separation device 2 can be achieved.
  • the fine separator 32 downstream of which is housed in the housing portion 14, comprises a cylindrical yarn package as a fine separator insert 34, which is closed on its cylinder head-facing side.
  • the flowing crankcase gases pass through the cylindrical wall of the yarn package, thereby depositing residual very fine liquid droplets which, within gravity of the yarn package, come down towards the cylinder head cover.
  • Figure 5 There is provided in Figure 5 only schematically indicated ⁇ lab 1500ö réelle 56 in the cylinder head cover.
  • the yarn package comprises at its upper end an outlet opening 58. In this area, the top wall 10 is bulged slightly upwards.
  • crankshaft gases are then deflected immediately in the region of the bulge by 90 ° and then deflected again by 90 ° down in the direction of the cylinder head cover 4. Due to the formation of the bulged portion 10 as a separate component, the manufacturability of the housing half shell 6 is considerably simplified in terms of the mold cost. Due to the very steep design of the overflow channel 60, the tree space required in the longitudinal direction is kept as low as possible. In a recess between the housing portions 14 and 16 engages a mating contour 59 which is formed on the cylinder head cover, so that no dead volume is formed, in which liquid could accumulate. From the overflow channel 60, the flowing crankcase gas passes into the housing region 16, where the valve device 36 is provided.
  • the valve device 36 comprises a diaphragm 62, shown diagrammatically in FIG. 5, which on the one hand communicates with the atmosphere and, on the other hand, is acted upon by the crankcase gas.
  • a diaphragm 62 shown diagrammatically in FIG. 5, which on the one hand communicates with the atmosphere and, on the other hand, is acted upon by the crankcase gas.
  • the valve means 36 closes an opening 64, under the pressure of the atmosphere. If the pressure below the diaphragm 62 increases due to the crankcase gas, the port 64 is released and crankcase gases are supplied to (re) combustion.
  • FIG. 6 shows a schematic illustration of two different embodiments of coils 48 with different radial depths of the flow path, which are achieved by cylindrical inner pieces 52 of different diameters while the outside diameter of the coil 48 remains the same.

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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)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Claims (16)

  1. Séparateur d'huile (2) pour les gaz de carter de vilebrequin d'un moteur à combustion interne comprenant un séparateur amont (28), un séparateur cyclone (30), un séparateur fin (32) et le cas échéant une installation de soupape (36), en cascade dans la culasse (4) du moteur à combustion interne,
    caractérisé en ce que
    le séparateur amont (28), le séparateur cyclone (30), le séparateur fin (32) et le cas échéant l'installation de soupape (36) sont sur le côté extérieur (20) de la culasse (4) et sont coiffés par une demi-coquille de boîtier (6) formant avec le côté extérieur (20) de la culasse (6), un boîtier pour le séparateur (2).
  2. Séparateur d'huile selon la revendication 1,
    caractérisé en ce que
    la demi-coquille de boîtier (6) est une pièce en matière plastique en une seule pièce, notamment une pièce injectée.
  3. Séparateur d'huile selon la revendication 1 ou 2,
    caractérisé en ce que
    les parois de guidage de flux (42) et/ou un insert en hélice (48) pour le séparateur cyclone (30) et/ou un insert de séparateur (34) pour le séparateur fin (32) et/ou l'installation de soupape (36) sont pré-assemblés dans la demi-coquille de boîtier (6).
  4. Séparateur d'huile selon les revendications 1, 2 ou 3,
    caractérisé en ce que
    la demi-coquille de boîtier (6) est rendue étanche par rapport au côté extérieur (20) de la culasse (4) par un joint périphérique.
  5. Séparateur d'huile selon l'une ou plusieurs des revendications précédentes,
    caractérisé en ce que
    la demi-coquille de boîtier (6) comprend des parois périphériques (8) s'étendant en direction de la culasse (4), ces parois rejoignant un bord périphérique (18) du côté frontal, par lequel la demi-coquille de boîtier (6) est appliquée de manière étanche contre le côté extérieur (20) de la culasse (4).
  6. Séparateur d'huile selon la revendication 5,
    caractérisé en ce que
    le bord périphérique (8) frontal comporte un plan d'installation (26).
  7. Séparateur d'huile selon l'une ou plusieurs des revendications précédentes,
    caractérisé en ce que
    la demi-coquille de boîtier (6) comporte des pattes (23) latéralement en saillie et notamment réalisées dans la matière, pour être traversées par des vis (22) ou une fixation par des éléments à enclipsage, accrochage ou réalisées d'une manière quelconque.
  8. Séparateur d'huile selon la revendication 7,
    caractérisé en ce que
    les oeillets (23) forment les surfaces d'appui d'extrémité lors du serrage des vis (22).
  9. Séparateur d'huile selon l'une ou plusieurs des revendications précédentes,
    caractérisé en ce qu'
    entre une sortie (58) du séparateur fin (32) débouchant vers le haut et une sortie (38) du séparateur d'huile, le chemin du flux est dévié essentiellement à l'équerre vers le bas en direction du côté de sortie (20) de la culasse (4).
  10. Séparateur d'huile selon l'une ou plusieurs des revendications précédentes,
    caractérisé en ce qu'
    entre une zone de boîtier (14) comprenant le séparateur fin (32) et une zone de boîtier (16) comprenant la sortie (38) et/ou l'installation de soupape (36) de la demi-coquille de boîtier (6), il est prévu un dégagement recevant à l'état monté du séparateur d'huile, un contre-contour (52) de forme complémentaire à la surface de la culasse.
  11. Séparateur d'huile selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    dans la direction de passage du flux ou la direction du montage en cascade, en amont du séparateur cyclone (30) il y a une ouverture de sortie d'huile (44) par laquelle l'huile séparée par le séparateur amont (28) est prélevée du chemin de passage de flux.
  12. Séparateur d'huile selon l'une ou plusieurs des revendications précédentes,
    caractérisé en ce qu'
    il comporte au moins deux hélices (48) de profondeur radiale différente pour le chemin d'écoulement, et qui, pour des dimensions extérieures par ailleurs identiques dans le séparateur cyclone (30), peuvent être installées au choix dans une zone de boîtier (14) comprenant le séparateur cyclone de la demi-coquille de boîtier (6).
  13. Séparateur d'huile selon la revendication 12,
    caractérisé en ce que
    le séparateur cyclone (30) comprend un chemin de flux (46) en forme d'hélice formée par une hélice avec une pièce intérieure cylindrique (52), ces pièces se montant sur la demi-coquille de boîtier (6) et la pièce intérieure cylindrique (52) définit le diamètre intérieur (Di) du chemin d'écoulement hélicoïdal (46).
  14. Séparateur d'huile selon la revendication 11 ou 12,
    caractérisé en ce que
    pour un pas d'hélice de 11-15 mm et un diamètre extérieur (Da) de 48-54 mm, le diamètre intérieur maximum (Di,max) du séparateur cyclone (30) correspond sensiblement à 8 mm (± 10 %).
  15. Séparateur d'huile selon la revendication 11 ou 12,
    caractérisé en ce que
    pour un pas d'hélice de 11-15 mm et un diamètre extérieur (Da) de 48-54 mm, le diamètre intérieur maximum (Di,max) du séparateur cyclone (30)correspond sensiblement à 18 mm (± 10 %).
  16. Séparateur d'huile selon la revendication 11 ou 12,
    caractérisé en ce que,
    pour un pas d'hélice de 11-15 mm et un diamètre extérieur (Da) de 48-54 mm, le diamètre intérieur maximum (Di,max) pour le séparateur cyclone (30) correspond à environ 24 mm (± 10 %).
EP02729807A 2001-06-07 2002-03-20 Dispositif separateur d'huile pour gas de carter de vilebrequin dans un moteur a combustion interne Expired - Lifetime EP1399649B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10127819 2001-06-07
DE10127819A DE10127819A1 (de) 2001-06-07 2001-06-07 Ölabscheidevorrichtung für Kurbelgehäusegase einer Verbrennungskraftmaschine
PCT/DE2002/001004 WO2002099255A1 (fr) 2001-06-07 2002-03-20 Dispositif separateur d'huile pour gas de carter de vilebrequin dans un moteur a combustion interne

Publications (2)

Publication Number Publication Date
EP1399649A1 EP1399649A1 (fr) 2004-03-24
EP1399649B1 true EP1399649B1 (fr) 2007-08-29

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP02729807A Expired - Lifetime EP1399649B1 (fr) 2001-06-07 2002-03-20 Dispositif separateur d'huile pour gas de carter de vilebrequin dans un moteur a combustion interne

Country Status (6)

Country Link
US (1) US6725849B2 (fr)
EP (1) EP1399649B1 (fr)
JP (1) JP4095957B2 (fr)
CZ (1) CZ300560B6 (fr)
DE (2) DE10127819A1 (fr)
WO (1) WO2002099255A1 (fr)

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DE19703770C1 (de) * 1997-02-01 1998-07-23 Daimler Benz Ag Entlüftungsvorrichtung mit integriertem Ölabscheider für ein Kurbelgehäuse einer Brennkraftmaschine
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JP3923288B2 (ja) * 2001-08-06 2007-05-30 本田技研工業株式会社 エンジンの気液分離装置

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CZ2003369A3 (cs) 2003-06-18
DE10127819A1 (de) 2003-01-02
WO2002099255A1 (fr) 2002-12-12
JP4095957B2 (ja) 2008-06-04
EP1399649A1 (fr) 2004-03-24
CZ300560B6 (cs) 2009-06-17
US20030150436A1 (en) 2003-08-14
US6725849B2 (en) 2004-04-27
DE50210817D1 (de) 2007-10-11
JP2004521236A (ja) 2004-07-15

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