EP0454512B1 - Dispositif de récupération et de recyclage des gaz de combustion imbrûlés émanant du carter d'un moteur à combustion interne, et moteur équipé de ce dispositif - Google Patents

Dispositif de récupération et de recyclage des gaz de combustion imbrûlés émanant du carter d'un moteur à combustion interne, et moteur équipé de ce dispositif Download PDF

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Publication number
EP0454512B1
EP0454512B1 EP19910400757 EP91400757A EP0454512B1 EP 0454512 B1 EP0454512 B1 EP 0454512B1 EP 19910400757 EP19910400757 EP 19910400757 EP 91400757 A EP91400757 A EP 91400757A EP 0454512 B1 EP0454512 B1 EP 0454512B1
Authority
EP
European Patent Office
Prior art keywords
cylinder head
chamber
internal combustion
combustion engine
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
EP19910400757
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0454512A1 (fr
Inventor
Jacques Dore
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.)
Automobiles Peugeot SA
Automobiles Citroen SA
Original Assignee
Automobiles Peugeot SA
Automobiles Citroen SA
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 Automobiles Peugeot SA, Automobiles Citroen SA filed Critical Automobiles Peugeot SA
Publication of EP0454512A1 publication Critical patent/EP0454512A1/fr
Application granted granted Critical
Publication of EP0454512B1 publication Critical patent/EP0454512B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • 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
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/18—DOHC [Double overhead camshaft]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/006—Camshaft or pushrod housings

Definitions

  • the present invention essentially relates to a device for recovering and recycling unburnt combustion gases emanating from the casing of an internal combustion engine.
  • decanting is carried out by means of a sheet, usually of complex shape, mounted in the decanting chamber.
  • a sheet usually of complex shape
  • Such an assembly is complex, expensive, and most often generates noise due to vibrations of the sheet in the chamber during engine operation.
  • Such a device is described by US-A-4,723,529.
  • the present invention aims to remedy these drawbacks in particular by proposing an improved recovery and recycling device and making it possible to avoid mounting a sheet of complex shape in the settling chamber, and which is consequently less expensive and technically simpler. With such a device, it is also possible to avoid any vibration generating noise during engine operation.
  • the subject of the present invention is a device for recovering and recycling unburnt combustion gases emanating from the casing of an internal combustion engine, of the type comprising, in the upper part of the engine, at least one chamber communicating with the intake circuit and with the casing to recycle respectively said unburnt combustion gases towards the intake and the oil withdrawn from these gases towards said casing, in which walls are formed in the foundry of the cylinder head cover to constitute, during assembly, said chamber.
  • the invention is characterized in that the cylinder head foundry has a wall situated in the joint plane of the cylinder head and the cylinder head cover, which wall constitutes the bottom wall of the chamber cited above.
  • said wall is pierced with orifices for the passage of unburnt combustion gases and for discharging the oil.
  • the foundry of the cylinder head cover forms a substantially U-shaped cross section conduit whose end of the branches bears on the aforementioned bottom wall, and which extends in a closed loop in substantially the joint plane of the cylinder head and the cylinder head cover.
  • the aforementioned conduit comprises baffles coming from molding with the cylinder head cover.
  • At least one screen is interposed in the aforementioned conduit to filter unburnt combustion gases before their recycling.
  • Figure 1 is a cross-sectional view, along a substantially vertical plane, of an engine equipped with a device according to the invention.
  • Figure 2 is a partial sectional view of the engine, along a sectional plane passing through the axes of the rods of two valves of a cylinder of this engine.
  • FIG. 3 is a partial view of the cylinder head cover, in section along line III-III in FIG. 2.
  • Figure 4 is a partial sectional view of the upper part of the engine, along line IV-IV of the figure 2.
  • FIG. 5 is a sectional view of the engine, along the line V-V of FIG. 4.
  • Figure 6 is a sectional view of the engine, similar to Figure 5 and illustrating a gas transit solution from the housing.
  • an internal combustion engine 1 with, at its lower part, a casing 2 into which opens an internal pipe 3 for connecting the casing 2 to a chamber 4 for recovering and decanting unburnt combustion gases emanating from of the casing 2.
  • This chamber 4 is located at the upper part of the engine 1, and we see at 5 the cylinder head of the engine on which is mounted a cylinder head cover 6.
  • This chamber 4, which forms, with the conduit 3, the recovery and recycling device according to the invention will now be described more precisely with reference to FIGS. 2 to 6.
  • the cylinder head cover 6 has an upper wall 16 from which two substantially parallel walls or partitions 36 project.
  • the partitions 36 and the upper wall 16 of the cylinder head cover 6 have, in cross section, substantially the shape of a U which constitutes the upper part of the chamber 4.
  • the cylinder head 5 has at its central part a wall 15 situated in the joint plane 10 of the cylinder head 5 and of the cylinder head cover 6.
  • the ends identified at 36a of the partitions 36 bear on the upper surface of the wall 15, which thus constitutes the bottom wall of chamber 4.
  • the chamber 4 is simply formed by the assembly of the walls 15, 16 and 36, which cooperate with each other during the mounting of the cylinder head cover 6 on the cylinder head 5.
  • the chamber 4 has the shape of a closed and oblong loop which extends, substantially parallel to the joint plane 10 of the cylinder head 5 and the cylinder head cover 6.
  • This oblong loop which constitutes the chamber 4 comprises two elongated parts 4a, substantially rectilinear and parallel to the longitudinal axis of the motor 1, and two curved parts 4b which connect the ends of the elongate parts 4a in pairs.
  • the seal between the partitions 36 and the wall 15 is ensured by two seals identified at 7 which are mounted in two housings 26 formed in the ends 36a of the partitions 36.
  • the partitions 36 of the chamber 4 include baffles 14, molded with the cylinder head cover 6 and projecting into the chamber 4, perpendicular to the bottom wall 15 and to the longitudinal direction of the parts 4a in which these baffles 14 are formed.
  • the baffles 14 make it possible to calm the gases which circulate in the chamber 4 and, consequently, to improve the separation of the gases and of the oil in suspension in these.
  • the screen 18 comes integrally with the partitions 36 of the cylinder head cover 6. It is understood that this screen makes it possible to filter the impurities suspended in the unburnt combustion gases, before these are recycled. It will be noted here that one or more similar sieves can be interposed in chamber 4.
  • connection conduit 3 is connected to the chamber 4 by an intermediate chamber 11.
  • This intermediate chamber 11 comprises a vertical partition 12 which defines two communicating volumes.
  • a tube 19 passes through one of the partitions 36 and opens into the chamber 4.
  • This tube 19 is assembled to the partition 36, for example by press fitting, so as to project from the cylinder head cover 6, substantially along the axis longitudinal of the engine 1.
  • This tube 19 allows the connection of the chamber 4 to the intake circuit (not shown) of the combustion gases to the engine 1.
  • the device for recycling and recovering unburnt combustion gases which has just been described operates in the following manner.
  • the recovery circuit formed by the connection conduit 3, the chambers 4 and 11 and as well as by the tube 19 is kept under vacuum under the effect of the suction of the intake circuit.
  • a vacuum causes the unburnt combustion gases to circulate accumulating in the casing 2, as illustrated by the arrows visible in FIG. 1.
  • the gases first pass through the connection conduit 3 to the chamber 11 and, as seen in FIG. 6, enter the chamber 4 through the orifice 25 formed in the wall 15.
  • the gases in circulation then invade the two elongated parts 4a, and are tranquilized by the baffles 14.
  • the oil suspended in the gases thus tranquilized is deposited on the walls 15, 16 and 36 as well as on the baffles 14, which makes it possible to decant the gases emanating from the casing 2, before recycling them in the intake circuit.
  • the oil thus separated from the gas collects under the effect of gravity at the bottom wall 15 and flows into the cavity C of the cylinder head 5 through the discharge orifices 13.
  • the decanted gases are filtered by the screen 18 and are routed, as illustrated by the arrows visible in FIG. 5, to the gas intake circuit to the engine 1, via the connection tube 19.
  • the recovery and recycling circuit unburnt combustion gases emanating from the casing may include one or more chambers of any shape, depending on the type of engine to which this circuit is to be applied, this or these chambers being produced by complementary walls and / or cavities, coming from molding with the cylinder head and the cylinder head cover.
  • the number and shape of the baffles and screens provided in the chamber constituted by the assembly of the cylinder head and the cylinder head cover are arbitrary and are determined according to the engine to which we are dealing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
EP19910400757 1990-04-26 1991-03-20 Dispositif de récupération et de recyclage des gaz de combustion imbrûlés émanant du carter d'un moteur à combustion interne, et moteur équipé de ce dispositif Expired - Lifetime EP0454512B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9005329 1990-04-26
FR9005329A FR2661455A1 (fr) 1990-04-26 1990-04-26 Dispositif de recuperation et de recyclage des gaz de combustion imbrules emanant du carter d'un moteur a combustion interne, et moteur equipe de ce dispositif.

Publications (2)

Publication Number Publication Date
EP0454512A1 EP0454512A1 (fr) 1991-10-30
EP0454512B1 true EP0454512B1 (fr) 1992-12-30

Family

ID=9396117

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910400757 Expired - Lifetime EP0454512B1 (fr) 1990-04-26 1991-03-20 Dispositif de récupération et de recyclage des gaz de combustion imbrûlés émanant du carter d'un moteur à combustion interne, et moteur équipé de ce dispositif

Country Status (3)

Country Link
EP (1) EP0454512B1 (xx)
DE (1) DE69100016T2 (xx)
FR (1) FR2661455A1 (xx)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10341144A1 (de) * 2003-09-06 2005-04-07 Fev Motorentechnik Gmbh Mehrzylinder-Kolbenbrennkraftmaschine mit Ölabscheidung für abgesaugtes Blow-By-Gas
DE102004041110A1 (de) * 2004-08-24 2006-03-02 Mahle Filtersysteme Gmbh Brennkraftmaschine und zugehörige Zylinderkopfhaube
CN110748396A (zh) * 2018-07-23 2020-02-04 本田技研工业株式会社 发动机的通风器结构

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19703771C1 (de) * 1997-02-01 1998-06-25 Daimler Benz Ag Entlüftungsvorrichtung für ein Kurbelgehäuse einer Brennkraftmaschine
JP3866394B2 (ja) * 1997-10-22 2007-01-10 本田技研工業株式会社 エンジンのブリーザ装置
FR2774129B1 (fr) * 1998-01-23 2000-03-10 Renault Dispositif de reaspiration des gaz de carter d'un moteur a combustion interne
DE19937033A1 (de) * 1999-08-05 2001-02-08 Volkswagen Ag Entlüftungsvorrichtung für ein Kurbelgehäuse einer Brennkraftmaschine
FR2819856B1 (fr) * 2001-01-25 2003-04-25 Renault Culasse de moteur thermique comportant un canal d'acheminement moule
FR2861430B1 (fr) 2003-10-28 2006-02-10 Peugeot Citroen Automobiles Sa Dispositif constitue d'une culasse et de son couvercle montes sur le bloc moteur pour le deshuilage des gaz perdus issus de la combustion et de la compression.
FR2949823B1 (fr) 2009-09-04 2013-05-10 Mark Iv Systemes Moteurs Sa Repartiteur integrant un circuit d'evacuation des gaz du carter et vehicule comportant un tel repartiteur

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2844130A (en) * 1956-11-05 1958-07-22 Deere Mfg Co Internal-combustion engine
DE1426102A1 (de) * 1962-04-25 1968-12-12 Daimler Benz Ag Ausbildung des Zylinderkopfes und der Zylinderkopfhaube von Einspritzbrennkraftmaschinen
JPS61277814A (ja) * 1985-06-03 1986-12-08 Honda Motor Co Ltd ブロ−バイガス環元装置
JPS6218314U (xx) * 1985-07-19 1987-02-03
US4825818A (en) * 1987-03-30 1989-05-02 Suzuki Jidosha Kogyo Kabushiki Kaisha Breather apparatus and cam chain tensioner adjuster apparatus in four-cycle engine

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10341144A1 (de) * 2003-09-06 2005-04-07 Fev Motorentechnik Gmbh Mehrzylinder-Kolbenbrennkraftmaschine mit Ölabscheidung für abgesaugtes Blow-By-Gas
DE10341144B4 (de) * 2003-09-06 2005-11-24 Fev Motorentechnik Gmbh Mehrzylinder-Kolbenbrennkraftmaschine mit Ölabscheidung für abgesaugtes Blow-By-Gas
DE102004041110A1 (de) * 2004-08-24 2006-03-02 Mahle Filtersysteme Gmbh Brennkraftmaschine und zugehörige Zylinderkopfhaube
DE102004041110B4 (de) * 2004-08-24 2018-12-20 Mahle Filtersysteme Gmbh Brennkraftmaschine und zugehörige Zylinderkopfhaube
CN110748396A (zh) * 2018-07-23 2020-02-04 本田技研工业株式会社 发动机的通风器结构
CN110748396B (zh) * 2018-07-23 2021-09-07 本田技研工业株式会社 发动机的通风器结构

Also Published As

Publication number Publication date
FR2661455A1 (fr) 1991-10-31
DE69100016D1 (de) 1993-02-11
FR2661455B1 (xx) 1994-08-19
EP0454512A1 (fr) 1991-10-30
DE69100016T2 (de) 1993-05-27

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