EP0964982A1 - Dispositif d'aeration pour carter de moteur a combustion interne - Google Patents

Dispositif d'aeration pour carter de moteur a combustion interne

Info

Publication number
EP0964982A1
EP0964982A1 EP98909439A EP98909439A EP0964982A1 EP 0964982 A1 EP0964982 A1 EP 0964982A1 EP 98909439 A EP98909439 A EP 98909439A EP 98909439 A EP98909439 A EP 98909439A EP 0964982 A1 EP0964982 A1 EP 0964982A1
Authority
EP
European Patent Office
Prior art keywords
internal combustion
combustion engine
gas
space
mass
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.)
Granted
Application number
EP98909439A
Other languages
German (de)
English (en)
Other versions
EP0964982B1 (fr
Inventor
Hans BRÜGGEMANN
Hansjörg FINKBEINER
Martin Schmid
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 EP0964982A1 publication Critical patent/EP0964982A1/fr
Application granted granted Critical
Publication of EP0964982B1 publication Critical patent/EP0964982B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F01M3/00—Lubrication specially adapted for engines with crankcase compression of fuel-air mixture or for other engines in which lubricant is contained in fuel, combustion air, or fuel-air mixture
    • F01M3/04—Lubrication specially adapted for engines with crankcase compression of fuel-air mixture or for other engines in which lubricant is contained in fuel, combustion air, or fuel-air mixture for upper cylinder lubrication only
    • 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
    • F01M2013/0422—Separating oil and gas with a centrifuge device

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 ventilation device " for a crankcase of an internal combustion engine in which the blow-by oil mixture is made the crankcase for oil separation is guided into a housing in which a balancer shaft is mounted.
  • the balancer shaft comprises a pipe section with openings which forms a separation space and is arranged between two balancer weights.
  • the rotating balancer shaft displaces the blow which has flowed from the crankcase into the housing of the balancer shaft -by-oil mixture also in rotation, whereby the oil droplets contained in the blow-by gases are mostly thrown against the outer wall of the balancer shaft and run from the housing of the balancer shaft into the oil pan of the engine.
  • the pure blow-by gases pass through the openings of the pipe section in the separation chamber of the balancer shaft and vo n there in an intake system of the internal combustion engine.
  • a major advantage of the ventilation devices according to the invention is the increase in the oil separation rate.
  • the spatial separation of the openings for feeding the blow-by oil mixture into the mass balance weights, the radial bores for the subsequent discharge of the oil droplets separated in the mass balance weights and the gas routing space for the discharge of the blow-by gas into the intake system of the internal combustion engine prevents entrainment of already deposited oil droplets in the intake system. Due to the centrifugal forces acting on the blow-by-oil mixture due to the rotating balance shaft, air and oil in the mass balance weights are inevitably separated from each other, whereby air and oil are passed on through different holes after the separation. No additional parts are required, since the ventilation device can be integrated into the balance shaft and the mass balance weights.
  • the machining effort is low because only holes in the balance shaft and the mass balance weights have to be drilled. An additional separation room can be omitted.
  • the centrifugal force acting on the oil is significantly greater than the gravity also acting on the oil, so that the oil-discharging radial bores can be arranged at any point on the circumference of the mass balance weights and any inclination of the Internal combustion engine or the vehicle remains without influence on the oil separation.
  • FIG. 1 shows a schematic diagram of a venting device according to the invention with feed bores and radial bores introduced into mass balancing weights of a balancer shaft and a gas guide space arranged in the balancer shaft according to a first exemplary embodiment
  • Fig. 2 is a schematic diagram of a venting device according to the invention with a gas guide space arranged in a balance shaft and radial bores made in mass balance weights of the balance shaft according to a second exemplary embodiment.
  • the internal combustion engine has a rotating balance shaft 2 with mass balance weights 3 and 4, which is mounted in a space 5 connected to the crankcase in the cylinder head 6 above gas exchange valves of the internal combustion engine, not shown here.
  • the room 5 is closed off at the top by means of a cover 7.
  • the balance shaft 2 has one in the direction of its rotation axis 8 extending Gas Evaluations syndromem 9 which is closed at one end 9a and a gas-releasing end 9b via a down tightly sealed to the outside chamber 10 with the only partially shown suction system 1 1 of the internal combustion engine is connected, whereby a negative pressure in the venting device 1 prevails.
  • two mutually opposite openings 12 are arranged on the end faces, which open into feed bores 13 running axially and parallel to the axis of rotation 8 of the balance shaft 2.
  • the feed bores 13 are connected to radial bores 14 which are also introduced into the mass balancing weights 3, 4 and which open into the space 5 outside the balancing shaft 2 and diagonally into the gas guide space 9 of the balancing shaft 2.
  • the blow-by-oil mixture emerging from the crankcase of the internal combustion engine passes via the space 5 surrounding the balancer shaft 2, due to the negative pressure prevailing in the ventilation device 1, into the openings 12 in the front of the rotating mass balance weights 3 and 4.
  • the gas flows from the openings 12 Oil mixture into the axially extending feed bores 13 of the rotating mass balance weights 3 and 4.
  • the centrifugal forces acting on the mixture cause the oil to be thrown off, which is deposited on the walls of the feed bores 13. Due to the centrifugal forces acting on the oil, the separated oil passes through the radial bores 14 of the mass balancing weights 3, 4 into the space 5 outside the balancing shaft 2 and drips into the oil pan of the internal combustion engine.
  • balance shaft 2 including the mass balance weights 3, 4 attached to it, rotates about the axis of rotation 8 at a high rotational speed, it is impossible for the oil droplets, in contrast to the gases, to get into the gas guide space 9 within the balance shaft 2 via the oil-discharging radial bores 14.
  • a reduction in the diameter of the end face facing the space 5 outside the balancer shaft 2 is not shown here. range 15 of the radial bores 14 and the associated increase in outflow resistance can additionally be achieved that only the separated oil and not the air in the space 5 outside the balancer shaft 2.
  • the blow-by gas takes the opposite path to the oil through the radial bores 14 and reaches the suction system via the gas guide space 9 and the adjoining chamber 10, which is airtight and sealed off from the environment 11 of the internal combustion engine.
  • the path of the blow-by mixture is indicated by arrows in FIGS. 1 and 2, the solid arrows indicating the path of the air and the dashed arrows indicating the path of the oil.
  • FIG. 2 shows a schematic exploded drawing of a further exemplary embodiment of a ventilation device 16 according to the invention.
  • the balance shaft 2 of the internal combustion engine has an opening 17 at the end 2a at the end for the entry of the blow-by mixture from the crankcase, which opens into a gas guide space 18, which has separation spaces 18a, 18b within the mass balance weights 3, 4A.
  • the mass balancing weights 3, 4 only have oil-carrying radial bores 19, which are connected on the one hand to the gas routing space 18 of the balancing shaft 2 and on the other hand to the space 5 outside the balancing shaft 2.
  • the gas routing chamber 18 of the balancer shaft 2 is connected to the intake system 11 of the internal combustion engine via the flow-calming chamber 10.
  • the blow-by mixture passes from the crankcase of the internal combustion engine via the opening 17 arranged at the end at the end 2a of the balance shaft 2 into the gas guide space 18 and thus into the separating spaces 18a, 18b of the balance shaft 2 rotating about the axis of rotation 8 the rotation of the balance shaft 2 and the mass balance weights 3, 4 on the Mixing centrifugal forces cause the oil to be ejected via the radial bores 19 of the mass balance weights 3, 4 into the space 5 outside the balance shaft 2, from where the oil drips into the oil pan of the internal combustion engine.
  • the blow-by gases are fed to the intake system 11 of the internal combustion engine via the chamber 10 adjoining a gas-discharging end 18c of the gas guide space 18.
  • the number of mass balance weights used for the ventilation device can vary, which would also make it conceivable to use only one mass balance weight.
  • the chamber arranged between the suction system and the venting device enables optimal sealing, for example by the chamber having a connection piece molded onto the chamber wall for connection to the suction system and the balance shaft being mounted in the chamber at its gas-discharging end by means of a shaft sealing ring.
  • the oil separation according to the two exemplary embodiments can be coordinated by varying the position, the diameter and the angle of the radial and axial bores.
  • the wetting area in the radial bores can be increased by introducing steel wool.

Landscapes

  • 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 dispositif d'aération (1) pour carter de moteur à combustion interne, avec un arbre de compensation (2) doté de poids de compensation de masses (3, 4), incorporé dans la culasse de cylindre au dessus des soupapes de changement des gaz du moteur à combustion interne et présentant au moins une ouverture (12) servant au moins à l'admission du gaz, et avec une chambre d'écoulement du gaz (9), laquelle passe à l'intérieur de l'arbre de compensation (2) et est reliée à un système d'aspiration (11) du moteur; une chambre installée à l'extérieur de l'arbre de compensation est reliée au carter. Le but de l'invention est de proposer un dispositif d'aération pour carter de moteur à combustion interne qui soit caractérisé par une capacité améliorée de séparation de l'huile et soit facile à réaliser. A cette fin, au moins une ouverture (12) est prévue dans au moins un poids de compensation de masses (3, 4), laquelle débouche sur au moins un alésage d'alimentation en huile (13), d'extension axiale et relié à au moins un alésage radial (14) d'évacuation d'huile intégré dans le poids de compensation de masses (3, 4).
EP98909439A 1997-02-19 1998-02-11 Dispositif d'aeration pour carter de moteur a combustion interne Expired - Lifetime EP0964982B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19706383A DE19706383C2 (de) 1997-02-19 1997-02-19 Entlüftungsvorrichtung für ein Kurbelgehäuse einer Brennkraftmaschine
DE19706383 1997-02-19
PCT/EP1998/000756 WO1998037316A1 (fr) 1997-02-19 1998-02-11 Dispositif d'aeration pour carter de moteur a combustion interne

Publications (2)

Publication Number Publication Date
EP0964982A1 true EP0964982A1 (fr) 1999-12-22
EP0964982B1 EP0964982B1 (fr) 2003-04-09

Family

ID=7820723

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98909439A Expired - Lifetime EP0964982B1 (fr) 1997-02-19 1998-02-11 Dispositif d'aeration pour carter de moteur a combustion interne

Country Status (6)

Country Link
US (1) US6279553B1 (fr)
EP (1) EP0964982B1 (fr)
JP (1) JP2000509783A (fr)
KR (1) KR20000071109A (fr)
DE (2) DE19706383C2 (fr)
WO (1) WO1998037316A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19931740C2 (de) 1999-07-08 2001-06-13 Daimler Chrysler Ag Hubkolbenbrennkraftmaschine mit einer Nockenwelle
DE19947143C1 (de) * 1999-10-01 2001-04-05 Daimler Chrysler Ag Entlüftungsvorrichtung für ein Kurbelgehäuse einer Brennkraftmaschine
DE102004008826A1 (de) * 2004-02-20 2005-09-08 Mahle Filtersysteme Gmbh Zentrifugal-Ölnebelabscheider in einem Verbrennungsmotor
DE102005013803A1 (de) * 2005-03-26 2006-09-28 Audi Ag Ausgleichswellenmodul
DE502006007644D1 (de) 2005-05-10 2010-09-23 Mahle Int Gmbh In eine axial hohle welle eines verbrennungsmotors integrierte zentrifugal-ölnebelabscheidereinrichtung
US8075655B2 (en) * 2008-06-17 2011-12-13 Cummins Filtration Ip, Inc. Rotative inertial impactor gas-oil separator for internal combustion engine
US9181869B2 (en) * 2010-01-08 2015-11-10 Husqvarna Ab Mechanical breather system for a four-stroke engine
JP6623769B2 (ja) * 2016-01-08 2019-12-25 スズキ株式会社 内燃機関のクランク室内圧低減機構
JP6879221B2 (ja) * 2018-01-12 2021-06-02 トヨタ自動車株式会社 内燃機関

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1091379B (de) * 1956-02-07 1960-10-20 Lloyd Motoren Werke G M B H Schmierung fuer Brennkraftmaschinen
FR2094273A5 (fr) * 1970-06-16 1972-02-04 Westinghouse Freins & Signaux
JPS585044Y2 (ja) * 1979-04-16 1983-01-28 日産自動車株式会社 内燃機関のブロ−バイガス環元装置用オイルセパレ−タ
FR2456841A1 (fr) * 1979-05-17 1980-12-12 Chrysler France Dispositif d'equilibrage a trois arbres rotatifs pour moteur a combustion interne
JPS60209620A (ja) * 1984-04-03 1985-10-22 Fuji Heavy Ind Ltd 内燃機関のブロ−バイガス還元装置
JPS61175213A (ja) * 1985-01-30 1986-08-06 Honda Motor Co Ltd エンジンにおけるカムケ−スのブリ−ザ装置
US4922881A (en) * 1987-12-29 1990-05-08 Kawasaki Jukogyo Kabushiki Kaisha Breather device for an internal combustion engine
DE4117876C1 (en) * 1991-05-31 1992-08-13 Bayerische Motoren Werke Ag, 8000 Muenchen, De Hollow IC engine camshaft with equalising mass - has extra weight of fluidic material in cavity widening bounded by eccentric peripheral sectionc
US5261380A (en) * 1992-07-15 1993-11-16 Ford Motor Company Crankcase ventilation system for automotive engine
DE4237128A1 (de) * 1992-11-03 1994-01-27 Bayerische Motoren Werke Ag Kurbelgehäuseentlüftung mit einer Zentrifuge
JPH0868340A (ja) * 1994-05-19 1996-03-12 Yamaha Motor Co Ltd カムシャフト駆動装置を備えるｖ型エンジン
US5542402A (en) * 1995-04-05 1996-08-06 Ford Motor Company Positive crankcase ventilation system with a centrifugal oil separator
AT403508B (de) * 1995-12-22 1998-03-25 Bombardier Rotax Gmbh Kurbelwellenantrieb mit einem verbrennungsmotor
JPH11107736A (ja) * 1997-10-03 1999-04-20 Kioritz Corp ４サイクル内燃機関

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9837316A1 *

Also Published As

Publication number Publication date
KR20000071109A (ko) 2000-11-25
DE19706383A1 (de) 1998-09-03
EP0964982B1 (fr) 2003-04-09
US6279553B1 (en) 2001-08-28
JP2000509783A (ja) 2000-08-02
WO1998037316A1 (fr) 1998-08-27
DE19706383C2 (de) 2000-05-18
DE59807873D1 (de) 2003-05-15

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