EP0870908B1 - Systeme de ventilation de carter de moteur à combustion interne - Google Patents

Systeme de ventilation de carter de moteur à combustion interne Download PDF

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Publication number
EP0870908B1
EP0870908B1 EP98104570A EP98104570A EP0870908B1 EP 0870908 B1 EP0870908 B1 EP 0870908B1 EP 98104570 A EP98104570 A EP 98104570A EP 98104570 A EP98104570 A EP 98104570A EP 0870908 B1 EP0870908 B1 EP 0870908B1
Authority
EP
European Patent Office
Prior art keywords
oil
head cover
cylinder
ventilation device
cylinder head
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
EP98104570A
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German (de)
English (en)
Other versions
EP0870908A1 (fr
Inventor
Klaus Bruchner
Michael Dohn
Ralf Kaufmann
Fritz Kreitmann
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.)
Mercedes Benz Group AG
Original Assignee
DaimlerChrysler 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 DaimlerChrysler AG filed Critical DaimlerChrysler AG
Publication of EP0870908A1 publication Critical patent/EP0870908A1/fr
Application granted granted Critical
Publication of EP0870908B1 publication Critical patent/EP0870908B1/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
    • F01M13/04—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

Definitions

  • the invention relates to a ventilation device for a crankcase of an internal combustion engine according to the preamble of claim 1.
  • a generic venting device is from DE 35 09 439 C2 known.
  • the ventilation device has one in one Cylinder head cover of the internal combustion engine integrated oil separator on which is formed from an upper part and a bottom part is.
  • the upper part is in one piece with the cylinder head cover connected and has baffles for oil separation.
  • the invention has for its object a ventilation device to create that uses existing space, easily and is inexpensive to manufacture, as well as a time and cost saving Assembly enables.
  • a major advantage of the invention is that it is small Space requirement of the ventilation device and the achieved thereby Weight saving.
  • the gradient of the oil separator in the cross-engine direction creates space for the valve train, in particular for the valve actuation lever of the internal combustion engine.
  • the cylinder head cover can be made as flat as possible.
  • the slope in the transverse direction of the engine causes one Enlargement of the seal contact area.
  • the oil separator also has a gradient in the longitudinal direction of the engine from Entry to the oil outlet on, making the oil outlet geodetic is lower than the inlet for the ventilation gases and thus the oil separated in the oil separator flows towards the oil outlet.
  • the oil separator works thereby in addition to the labyrinth separator as a volume separator.
  • the parting plane of the oil separator advantageously runs between a plate-shaped base part and a trough-shaped Upper part, which creates the in the tub-shaped upper part arranged ridges sealing after installing the oil separator also arranged on the plate-shaped base part plate-shaped seal rests. With a course the parting line through the webs i.e.
  • the oil leak from the oil separator is designed as a siphon and prevents unwanted inflow of ventilation gases through the oil outlet in the oil separator countercurrent to oil.
  • a pre-separator within the Cylinder head cover bulkheads provided together with a chainshaft from the camshaft chamber essentially separate so that only the vent gases over get a passage into the camshaft space and that Spray oil on before entering the camshaft chamber the bulkheads are roughly separated.
  • the camshaft space is not flooded by the spray oil.
  • the different The lengths of the partition bars depend on the direction of rotation of the crankshaft dependent, the shorter bulkhead a free one Cross section, the passage mentioned above, for the vent gas from the chain shaft into the camshaft space.
  • the cylinder head cover is preferably made from a die-cast part formed, whereby no further deburring other than Processing steps are necessary.
  • the entry into the oil separator expediently points Slits with lamellas and caused by its design another external oil separation, i.e. an oil separation, which takes place outside the actual oil separator.
  • an oil separation which takes place outside the actual oil separator.
  • the first external oil separation takes place as already mentioned by means of the bulkheads in the chain shaft. It also prevents the chain shaft facing away as well the arrangement facing the cylinder head cover side wall and Design of the entry of a transfer of spray oil the camshaft space.
  • the upper part of the oil separator advantageously has one Partition surface in which a catch groove is provided for the seal is.
  • a catch groove is provided for the seal is.
  • FIG. 1 shows a ventilation device 1 for a crankcase of an internal combustion engine, not shown here in an inclined installation position.
  • a cylinder head on the crankcase 2 attached, covered by a cylinder head cover 3 is, the cylinder head cover 3 over a bottom Chain shaft 4 described in more detail (see FIG. 2) and one Camshaft space 5 of the cylinder head 2 extends.
  • the cylinder head cover 3 is preferably by a die-cast aluminum educated.
  • the venting device 1 has a substantially in the Cylinder head cover 3 integrated oil separator 6 on one an intake system of the internal combustion engine, not shown here opposite side 7 of the cylinder head cover 3 in the direction a motor longitudinal axis 8 (see Fig. 2).
  • the oil separator 6 comprises one piece with the cylinder head cover 3 formed upper part 9 and a covering the upper part 9, plate-shaped bottom part 10, 9 the oil separator 6 formed as baffles webs 11 are a labyrinth as shown in FIG. 3 and the oil separation serve.
  • FIG. 2 shows the cylinder head cover 3 with the oil separator 6, the upper part 9 and the fastening screws 12 with the upper part 9 connected bottom part 10 of the oil separator 6 form a box-shaped housing. Between upper part 9 and bottom part 10 of the oil separator 6 is one shown in FIG. 1 Seal 13 arranged.
  • the plate-shaped bottom part 10 of the oil separator 6 has an inlet 14 for the Vent gases and an oil outlet 15 for the separated Oil on.
  • the inlet 14 consists of several diagonally to the engine longitudinal axis 8 extending slots 16 with fins 17 for Protection against splash oil from the camshaft chamber 5.
  • the oil outlet 15 comprises a cast on the bottom part 10
  • the height of the weirs 20 is designed such that the oil drain tube 18 in all swivel angles of the internal combustion engine always below the oil level in the oil pocket 19 lies, i.e. the swivel angle determines the contour of the oil pocket 19.
  • the oil drain tube 18 has two at its free end 21 Bevels 22 and 23 on the one hand, a closure of the oil drain tube 18 in the event of a possible bump on the ground prevent the oil pocket 19 and on the other hand the freedom of movement of the oil drain tube 18 within the through the oil pocket 19 given tolerances.
  • the oil drain tube 18 can thus be arranged as close as possible to the bottom of the oil pocket 19 his.
  • the chain shaft 4 and the camshaft space 5 are inside the cylinder head cover 3 by two spaced and Partition webs 25, 26 running in the direction of a vertical axis 24 and a camshaft bearing arranged between the bulkheads 25, 26 27 in addition to the camshaft, not shown here separated from each other, which prevents penetration of spray oil a on a drive wheel 28 rotating control chain 29 from the Chain slot 4 is prevented.
  • the different length of the Isolation webs 25, 26 depend on the direction of rotation D Timing chain 29, viewed in the direction of rotation D of timing chain 29 on the shorter bulkhead 26 the longer bulkhead 25 follows. That through the timing chain 29 in the cylinder head cover 3 entrained oil mainly flows over the longer bulkhead 25 back into the chain shaft 4.
  • the shorter bulkhead 26 leaves a passage 30 for the path of the vent gas free in the camshaft chamber 5.
  • the oil separator 6 has both a slope G L (see FIG. 3) running in the direction of the longitudinal axis 8 of the engine from the inlet 14 to the oil outlet 15 and a slope G Q (see FIG. 1) extending in the direction of a transverse engine axis 31, the oil outlet 15 is arranged at the geodetically lowest point.
  • the slope of the oil separator 6 in the transverse direction of the motor axis 31 is substantially eliminated in the inclined installation position of the internal combustion engine, so that a parting plane 32 between the top part 9 and the bottom part 10 of the oil separator 6 or a parting surface 32a of the top part 9 and a parting surface 32b of the bottom part 10 in the Horizontal lies (see Fig. 1).
  • FIG. 3 shows a side view of the cylinder head cover 3 with the integrally molded upper part 9 of the oil separator 6.
  • the webs 11 of the upper part 9 forming the labyrinth are compared to the separating surface 32a of the upper part 9 set back somewhat in the direction of the motor vertical axis 24, so that the seal 13 in the assembled state of the oil separator 6 rests firmly on the separating surface 32a of the upper part 9 which runs at an angle ⁇ to the motor transverse axis 31 due to the gradient G Q (see FIG. 1) and thus is tightly clamped between the upper part 9 and the bottom part 10.
  • the forces acting on the seal 13 run at an angle ⁇ to the motor transverse axis 31 in contrast to the forces of the fastening screws 12 acting in the direction of the motor vertical axis 24.
  • the oil separator 6 is in the upper part via an intake port 33 9 in connection with the intake system of the internal combustion engine.
  • the intake manifold 33 is molded onto the cylinder head cover 3, wherein a first portion 33a of the intake port 33 in Direction of the motor vertical axis 24 and a second section 33b in Direction of the motor transverse axis 31, i.e. over the cylinder head cover 3, runs (see also Fig. 2).
  • the two perpendicular to each other extending sections 33a, 33b on the one hand enable one Deflection of the vent gas from that facing away from the intake system to the side of the internal combustion engine facing the intake system and on the other hand a die-cast-compatible production the cylinder head cover 3.
  • a free end 34 of the intake manifold 33 has a partially molded one for manufacturing reasons Bead 35, which slides on a drawn on the nozzle 33 Hose prevented.
  • Bead 35 which slides on a drawn on the nozzle 33 Hose prevented.
  • One because of the inclined Installation position of the motor beveled rib 36 is in the upper part 9 formed at the transition in the intake manifold 33, so that no Oil is drawn into the intake port 33.
  • Fig. 4 shows the parting surface 32b of the bottom part 10 on which the Seal 13 can rest.
  • the seal 13 can be both pure Elastomer seal as well as a sandwich seal be, the sandwich seal one between two rubber layers inlaid metal layer.
  • the pressing of the Elastomer seal in the so-called shunt method is through arranged on the bottom part 10 in the area of the fastening screws 12
  • Spacers 37 limited in the assembled state of the oil separator 6 on the separating surface 32a of the upper part 9 rest and thus a space defined for the seal 13 form between bottom part 10 and top part 9.
  • the sandwich seal is pressed in the so-called main closing procedure.
  • the spacers 37 serve at the same time as holding elements for the seal 13 the bottom part 10 contact elements 38 for positioning the bottom part 10 on the upper part 9, which cooperate with the upper part 9 and also as holding elements for the seal 13 serve.
  • Fig. 3 are in the area of the contact elements 38 following the parting surface 32a of the upper part 9 thickenings 39, which can also be trapezoidal, arranged to enlarge the contact surface of the seal 13.
  • the separating surface 32a of the upper part 9 also has one Catch groove 40, in which the seal 13 in the assembled State of the oil separator 6 presses.
  • venting are those when operating the internal combustion engine resulting ventilation gases derived from the crankcase and reach over the chain shaft 4 in the extension of the bulkhead 26 arranged passage 30 in the camshaft space 5, with a first pre-separation of the in oil particles carried along with the ventilation gases at the bulkheads 25, 26 takes place.
  • the vent gases flow over the Passage 30 into the camshaft space 5 and experience one 180 ° deflection, making it suitable for a second pre-separation a wall of the cylinder head cover 3 and then against the fins 17 of the inlet 14 bounce into the oil separator 6.
  • the entrance 14 is designed such that the one described above Vent gas flow or deflection forms and also no spray oil from the camshaft chamber 5 into the oil separator 6 can inject.
  • vent gases pass through inlet 14 in the oil separator 6.
  • the rest in the ventilation gases entrained oil particles now separate in the oil separator 6 and will be here via the oil outlet 15 not shown, in the cylinder head 2 and in the crankcase arranged oil return through which the separated Oil particles then in a likewise not shown Oil pan at the lower end of the crankcase are traceable.
  • the de-oiled vent gases are discharged through the intake port 33 the intake system located after the oil separator 6 fed to the internal combustion engine and then the motor Combustion mixed.
  • the webs 11 of the upper part 9, which are designed as baffles, are arranged in such a way that the vent gas stream entering the oil separator 6 is deflected several times, the webs 11 running diagonally to the longitudinal axis 8 of the engine and the separated oil leading to the oil outlet 15.
  • the oil particles of the ventilation gases hit the webs 11, settle there and flow via the base part 10 into the oil outlet 15.
  • the oil separator 6 is designed both as a volume separator and as a labyrinth separator, the transition from small to large cross sections and long ways to calm the oil-containing venting gas and baffles to deflect the venting gas stream enable oil separation.

Landscapes

  • 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 (5)

  1. Dispositif de désaérage pour un carter de vilebrequin dans un moteur à combustion interne, sur lequel est fixée une tête de cylindres recouverte par un capot de tête de cylindres, le dispositif de désaérage comprenant un séparateur d'huile sensiblement intégré dans le capot de tête de cylindres et pourvu de chicanes, ledit séparateur étant formé par une partie supérieure reliée d'une seule pièce au capot de tête de cylindres et par une partie de fond, ledit séparateur d'huile comportant une entrée, un manchon d'aspiration relié au système d'aspiration du moteur à combustion interne, ainsi qu'une sortie d'huile, et dans lequel les chicanes du séparateur d'huile sont formées par des barrettes de la partie supérieure,
    caractérisé en ce que le séparateur d'huile (6) présente une pente (GL) qui s'étend de l'entrée (14) à la sortie d'huile (15) dans la direction de l'axe longitudinal du moteur (8), et une pente (GO) qui s'étend en direction de l'axe transversal du moteur (31), et en ce que la sortie d'huile (15) du séparateur d'huile (6) comporte un petit tube (18) d'évacuation d'huile qui plonge dans une poche à huile (19), laquelle est formée par un barrage (20) formé dans la tête de cylindres (2).
  2. Dispositif de désaérage selon la revendication 1,
    caractérisé en ce que le capot de tête de cylindres (3) recouvre un puits à chaíne (4) et une chambre d'arbre à cames (5), et en ce qu'il est prévu à l'intérieur du capot de tête de cylindres (3) des barrettes écran (25,26) entre le puits à chaíne (4) et la chambre d'arbre à cames (5) pour constituer un pré-séparateur.
  3. Dispositif de désaérage selon la revendication 1,
    caractérisé en ce que le capot de tête de cylindres (3) est réalisé par une pièce moulée sous pression.
  4. Dispositif de désaérage selon la revendication 1,
    caractérisé en ce que l'entrée (14) dans le séparateur d'huile (6) comporte des fentes (16) avec des lamelles (17).
  5. Dispositif de désaérage selon la revendication 1,
    caractérisé en ce que la partie supérieure (9) du séparateur d'huile (6) comporte une surface de séparation (32a) dans laquelle est ménagée une gorge réceptrice (40) pour un joint (13).
EP98104570A 1997-04-11 1998-03-13 Systeme de ventilation de carter de moteur à combustion interne Expired - Lifetime EP0870908B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19715061 1997-04-11
DE19715061A DE19715061C2 (de) 1997-04-11 1997-04-11 Entlüftungsvorrichtung für ein Kurbelgehäuse einer Brennkraftmaschine

Publications (2)

Publication Number Publication Date
EP0870908A1 EP0870908A1 (fr) 1998-10-14
EP0870908B1 true EP0870908B1 (fr) 2001-12-05

Family

ID=7826164

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98104570A Expired - Lifetime EP0870908B1 (fr) 1997-04-11 1998-03-13 Systeme de ventilation de carter de moteur à combustion interne

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EP (1) EP0870908B1 (fr)
DE (2) DE19715061C2 (fr)
ES (1) ES2168695T3 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2789125B1 (fr) * 1999-01-29 2001-11-09 Renault Dispositif de reaspiration des gaz de carter d'un moteur
DE19951028A1 (de) 1999-10-22 2001-04-26 Volkswagen Ag Entlüftungsvorrichtung mit Ölabscheider für ein Kurbelgehäuse einer Brennkraftmaschine
FR2819291B1 (fr) * 2001-01-11 2003-03-14 Renault Dispositif de retour d'huile formant siphon pour moteur a combustion interne
DE10127817A1 (de) 2001-06-07 2002-12-12 Bosch Gmbh Robert Ölabscheidevorrichtung für Kurbelgehäusegase einer Verbrennungskraftmaschine
DE10247175A1 (de) * 2002-10-10 2004-04-22 Daimlerchrysler Ag Entlüftungsvorrichtung für ein Kurbelgehäuse einer Brennkraftmaschine
AT6652U1 (de) 2002-10-17 2004-01-26 Avl List Gmbh Kurbelgehäuseentlüftungssystem einer brennkraftmaschine
WO2004081364A1 (fr) * 2003-03-11 2004-09-23 Yanmar Co., Ltd. Structure superieure d'un moteur
JP2004353505A (ja) * 2003-05-28 2004-12-16 Petroliam Nasional Bhd エンジンにおけるブリーザ装置
DE102004014693A1 (de) * 2004-03-25 2005-10-13 Volkswagen Ag Druckregelventil für eine Brennkraftmaschine
FR2868468B1 (fr) * 2004-04-06 2008-03-21 Renault Sas Dispositif de retour d huile formant siphon pour moteur a combustion interne
DE102005003149B8 (de) * 2005-01-21 2008-04-10 Joma-Polytec Kunststofftechnik Gmbh Ölabscheider zur Entölung des Kurbelgehäuse-Entlüftungsgases und Verfahren
DE102006008516A1 (de) * 2006-02-23 2007-08-30 Fev Motorentechnik Gmbh Zylinderkopf einer Brennkraftmaschine
DE102008022818A1 (de) * 2008-05-08 2009-11-12 Hengst Gmbh & Co.Kg Ölabscheider mit Siphon
DE102008058962A1 (de) * 2008-11-25 2010-05-27 Hengst Gmbh & Co.Kg Kurbelgehäuseentlüftungseinrichtung einer Brennkraftmaschine
DE102011008537A1 (de) * 2011-01-13 2012-07-19 GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) Motorblock
DE102016015111B4 (de) 2016-12-20 2021-10-14 Deutz Aktiengesellschaft Brennkraftmaschine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3509439A1 (de) * 1984-03-15 1985-09-26 Honda Giken Kogyo K.K., Tokio/Tokyo Lueftungssystem fuer ein kurbelgehaeuse und verfahren zur entfernung von oelnebel von dem gas des systems

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3128470C2 (de) * 1981-07-18 1983-05-11 Bayerische Motoren Werke Ag, 8000 Muenchen Zyklonölabscheider
JPS6179813A (ja) * 1984-09-26 1986-04-23 Toyota Motor Corp ブロ−バイガスのオイル分離装置
DE3713210A1 (de) 1987-04-18 1988-11-03 Porsche Ag Entlueftungsvorrichtung mit integriertem oelabscheider
US5069192A (en) * 1989-10-24 1991-12-03 Nissan Motor Company, Ltd. Internal combustion engine with crankcase ventilation system
DE4101203A1 (de) * 1991-01-17 1992-07-23 Bayerische Motoren Werke Ag Kurbelgehaeuseentlueftung einer brennkraftmaschine
JPH08260936A (ja) * 1995-03-27 1996-10-08 Kubota Corp エンジンのブリーザ装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3509439A1 (de) * 1984-03-15 1985-09-26 Honda Giken Kogyo K.K., Tokio/Tokyo Lueftungssystem fuer ein kurbelgehaeuse und verfahren zur entfernung von oelnebel von dem gas des systems

Also Published As

Publication number Publication date
EP0870908A1 (fr) 1998-10-14
DE19715061A1 (de) 1998-10-15
DE59802287D1 (de) 2002-01-17
DE19715061C2 (de) 1999-01-21
ES2168695T3 (es) 2002-06-16

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