EP0448431B1 - Intake device and oil separator for an internal combustion engine and engine provided with this device - Google Patents

Intake device and oil separator for an internal combustion engine and engine provided with this device Download PDF

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Publication number
EP0448431B1
EP0448431B1 EP19910400561 EP91400561A EP0448431B1 EP 0448431 B1 EP0448431 B1 EP 0448431B1 EP 19910400561 EP19910400561 EP 19910400561 EP 91400561 A EP91400561 A EP 91400561A EP 0448431 B1 EP0448431 B1 EP 0448431B1
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EP
European Patent Office
Prior art keywords
engine
cylinder head
partition
chamber
intake
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
EP19910400561
Other languages
German (de)
French (fr)
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EP0448431A1 (en
Inventor
Gabriel Laine
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
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Filing date
Publication date
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Publication of EP0448431A1 publication Critical patent/EP0448431A1/en
Application granted granted Critical
Publication of EP0448431B1 publication Critical patent/EP0448431B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/104—Intake manifolds
    • F02M35/112—Intake manifolds for engines with cylinders all in one line
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10006—Air intakes; Induction systems characterised by the position of elements of the air intake system in direction of the air intake flow, i.e. between ambient air inlet and supply to the combustion chamber
    • F02M35/10072—Intake runners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10091—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements
    • F02M35/10111—Substantially V-, C- or U-shaped ducts in direction of the flow path
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10209—Fluid connections to the air intake system; their arrangement of pipes, valves or the like
    • F02M35/10222—Exhaust gas recirculation [EGR]; Positive crankcase ventilation [PCV]; Additional air admission, lubricant or fuel vapour admission
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
    • F02M35/10288—Air intakes combined with another engine part, e.g. cylinder head cover or being cast in one piece with the exhaust manifold, cylinder head or engine block
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/16—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines characterised by use in vehicles
    • F02M35/161—Arrangement of the air intake system in the engine compartment, e.g. with respect to the bonnet or the vehicle front face
    • 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
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/04—Filling or draining lubricant of or from machines or engines
    • 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
    • F01M13/023—Control valves in suction conduit

Definitions

  • the present invention essentially relates to an internal combustion engine comprising a gas intake and oil removal device as described in the preamble of claim 1.
  • This single piece forming a cylinder head cover advantageously makes it possible to reduce the total height of the engine under the hood of the vehicle, so that the engine thus has a minimum bulk and compatible with a modern and somewhat plunging shape for the front part of the body of the vehicle.
  • the present invention aims to solve these problems by proposing a cylinder head cover of the type defined above and which is incorporated a gas deoiling system and filling the crankcase oil, which does not affect the overall dimensions and height of the engine.
  • the subject of the invention is an internal combustion engine comprising a device for admission and deoiling of the crankcase gases and of the type essentially comprising a cylinder head surmounting several cylinders to which are respectively connected several gas intake conduits which form with a manifold distribution of these gases a rigid part, characterized in that said rigid part, constituting a cylinder head cover, rests on a partition or the like secured to the cylinder head and forming, on one side of the partition, a hollow space connected to the casing of the engine by channels, and comprises, on the other side of the partition, a chamber for removing oil from the gases sucked back by the engine intake circuit, which is connected on the one hand to the manifold by openings, and on the other hand to said hollow space by passages passing through said partition.
  • the aforementioned partition integral with the cylinder head constitutes a camshaft support fixed on the top of the cylinder head.
  • the engine is filled with oil by a chute adjacent to the deoiling chamber and communicating by a passage with the hollow space under the partition.
  • the aforementioned passages are constituted by tubular connections mounted between the partition and the aforementioned rigid part.
  • the openings connecting the chamber oil removal at the manifold are associated with a pressure regulator integrated into the rigid part.
  • FIG. 1 is a view in vertical section of the upper part of an engine equipped with a device according to this invention, the section being taken along the line I-I of FIG. 2.
  • Figure 2 is a top plan view of the top of the engine.
  • Figure 3 is a sectional view along lines III-III of Figure 2.
  • Figure 4 is a sectional view along line IV-IV of Figure 1.
  • the part 4 forming cylinder head cover rests on a partition 5 belonging to a support 6 for a camshaft 7, which support is tightly fixed on the top of the cylinder head 1 and somehow forms an intermediate piece between said cylinder head and the cylinder head cover 4.
  • Such a construction advantageously makes it possible on the one hand to provide under the partition 5 between the camshaft support 6 and the cylinder head 1 a hollow space 8, and to provide d on the other hand, in the cylinder head cover 4, and on the other side of the partition 5, a chamber 9 for removing oil from the gases coming from the lower casing of the engine, re-aspirated by the intake circuit 2 and recycled to the engine.
  • the hollow space 8 is connected to the oil sump (not shown) of the engine by channels identified at 10 in FIG. 3 and at 11 in FIG. 1.
  • the oil removal chamber 9 is connected on the one hand to the distribution manifold 3 by openings 12, 13 which will be described in detail below, and this oil removal chamber 9 is connected on the other hand to the hollow space 8 by passages 14, 15 passing through the partition 5 forming part of the camshaft support 6 7.
  • the engine oil can be filled by a chute 16 (FIG. 1) integrated into the cylinder head cover 4 and adjacent to the deoiling chamber 9, this chute communicating through a passage 17 with the hollow space 8 which itself communicates with the crankcase of the engine through the channel 11.
  • a plug 18 has been shown which, as known per se, allows the oil inlet to the shutter 16 to be closed.
  • the passages 14, 15 and 17 above mentioned are respectively constituted by tubular connections R mounted between the partition 5 and the rigid piece forming a cylinder head cover 4, said connections R providing a tightness at the joint surfaces between the partition and the cylinder head cover.
  • FIG. 20 shows a pressure regulator advantageously integrated into the rigid part or cylinder head cover 4 and in which the previously mentioned openings 12, 13 are provided and allowing communication between the chamber 9 and the distribution manifold 3 as long as the vacuum in the collector is less than a determined value.
  • this regulator is incorporated into the cylinder head cover 4 so that the height of the engine remains minimal with respect to the hood C of the vehicle, and, in the same spirit, the manifold 3 is disposed laterally with respect to the chamber 9 and the intake ducts 2 are juxtaposed with the deoiling chamber 9 so as to also give the engine or more precisely to the cylinder head cover 4, a minimum height and therefore a Sufficient free space vis-à-vis the hood C of the vehicle.
  • the space between the hood C of the vehicle and the engine is optimally used by nesting in the cylinder head cover 4 in particular for oil removal functions from the gas of the casing and of the oil filling of this casing, which functions are closely associated with the manifold-distributor 3 in the free space between the intake ducts 2, and will be described below.
  • the gas deoiling function is performed as follows.
  • the gases emitted in the engine casing rise into the oil removal or decantation chamber through the conduit 10 of the cylinder head 1, then through the passages 14 formed by the tubular connections R as can be seen in Figures 3 and 4 in particular.
  • the suction of these gases is carried out thanks to the vacuum which prevails in the manifold-distributor 3 which communicates with the chamber 9 through the openings 12 and 13, and this through the pressure regulator 20 whose valve 20a limits the suction crankcase gases to the intake in the event of a high vacuum in the manifold.
  • the oil in suspension in the gases is collected in the chamber 9 and returns to the engine oil pan via successively the passages 15 and 19, the hollow space 8 and the channel 11 in the cylinder head 1.
  • the gases cleared d oil are on their side, sent with air or the air-fuel gas mixture to the engine cylinders via the intake ducts 2, as shown by arrows in Figures 1 and 2.
  • the oil filling function it takes place through the chute 16 which is in communication with the hollow space 8 via the passage 17, the oil flowing towards the engine through the channel 11 in the cylinder head 1.
  • a one-piece multi-function cylinder head cover was therefore produced according to the invention, constituting a compact intake sub-assembly and allowing the improvement of the style, in particular at the level of the hood of the vehicle.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)

Description

La présente invention a essentiellement pour objet un moteur à combustion interne comportant un dispositif d'admission et de déshuilage des gaz tel que décrit dans le préambule de la revendication 1.The present invention essentially relates to an internal combustion engine comprising a gas intake and oil removal device as described in the preamble of claim 1.

On connaît, d'après par exemple le document FR-A-2 239 900 un moteur comportant des conduits d'admission qui forment une seule pièce avec le capot de culasse et le collecteur d'admission.We know from, for example, document FR-A-2 239 900 an engine comprising intake ducts which form a single piece with the cylinder head cover and the intake manifold.

Cette pièce unique formant couvre-culasse permet avantageusement de diminuer la hauteur totale du moteur sous le capot du véhicule, de sorte que le moteur présente ainsi un encombrement minimum et compatible avec une forme moderne et quelque peu plongeante pour la partie avant de la carrosserie du véhicule.This single piece forming a cylinder head cover advantageously makes it possible to reduce the total height of the engine under the hood of the vehicle, so that the engine thus has a minimum bulk and compatible with a modern and somewhat plunging shape for the front part of the body of the vehicle.

Toutefois, avec un tel couvre-culasse permettant d'abaisser la hauteur totale du moteur, l'intégration à ce couvre-culasse d'une part d'une fonction de déshuilage des gaz émis par le carter et recyclés dans le circuit d'admission du moteur via le couvre-culasse, et d'autre part d'une fonction de remplissage en huile du carter du moteur, pose des problèmes si l'on veut que le couvre-culasse conserve une hauteur minimum.However, with such a cylinder head cover making it possible to lower the total height of the engine, the integration into this cylinder head cover on the one hand of a function of deoiling the gases emitted by the casing and recycled in the intake circuit of the engine via the cylinder head cover, and on the other hand of an oil filling function of the engine casing, poses problems if one wants the cylinder head cover to keep a minimum height.

La présente invention a pour but de résoudre ces problèmes en proposant un couvre-culasse du type défini ci-dessus et auquel est incorporé un système de déshuilage des gaz et de remplissage du carter en huile, qui n'affecte aucunement l'encombrement et la hauteur du moteur.The present invention aims to solve these problems by proposing a cylinder head cover of the type defined above and which is incorporated a gas deoiling system and filling the crankcase oil, which does not affect the overall dimensions and height of the engine.

On connaît par ailleurs d'après le document US-A-4 602 607 un moteur correspondant au préambule de la revendication 1.Also known from document US-A-4 602 607 is a motor corresponding to the preamble of claim 1.

L'invention a pour objet un moteur à combustion interne comportant un dispositif d'admission et de déshuilage des gaz de carter et du type comprenant essentiellement une culasse surmontant plusieurs cylindres auxquels sont respectivement raccordés plusieurs conduits d'admission de gaz qui forment avec un collecteur de répartition de ces gaz une pièce rigide, caractérisé en ce que ladite pièce rigide, constituant un couvre-culasse, repose sur une cloison ou analogue solidaire de la culasse et formant, d'un côté de la cloison, un espace creux relié au carter du moteur par des canaux, et comporte, de l'autre côté de la cloison, une chambre de déshuilage des gaz réaspirés par le circuit d'admission du moteur, qui est reliée d'une part au collecteur par des ouvertures, et d'autre part audit espace creux par des passages traversant ladite cloison.The subject of the invention is an internal combustion engine comprising a device for admission and deoiling of the crankcase gases and of the type essentially comprising a cylinder head surmounting several cylinders to which are respectively connected several gas intake conduits which form with a manifold distribution of these gases a rigid part, characterized in that said rigid part, constituting a cylinder head cover, rests on a partition or the like secured to the cylinder head and forming, on one side of the partition, a hollow space connected to the casing of the engine by channels, and comprises, on the other side of the partition, a chamber for removing oil from the gases sucked back by the engine intake circuit, which is connected on the one hand to the manifold by openings, and on the other hand to said hollow space by passages passing through said partition.

Suivant une autre caractéristique de ce moteur, la cloison précitée solidaire de la culasse constitue un support d'arbre à cames fixé sur le dessus de la culasse.According to another characteristic of this engine, the aforementioned partition integral with the cylinder head constitutes a camshaft support fixed on the top of the cylinder head.

Suivant encore une autre caractéristique de ce moteur, le remplissage en huile du moteur s'effectue par une goulotte adjacente à la chambre de déshuilage et communiquant par un passage avec l'espace creux sous la cloison.According to yet another characteristic of this engine, the engine is filled with oil by a chute adjacent to the deoiling chamber and communicating by a passage with the hollow space under the partition.

On précisera encore ici que les passages précités sont constitués par des raccords tubulaires montés entre la cloison et la pièce rigide précitée.It will also be specified here that the aforementioned passages are constituted by tubular connections mounted between the partition and the aforementioned rigid part.

Selon encore une autre caractéristique du moteur de l'invention, les ouvertures reliant la chambre de déshuilage au collecteur sont associées à un régulateur de pression intégré à la pièce rigide.According to yet another characteristic of the engine of the invention, the openings connecting the chamber oil removal at the manifold are associated with a pressure regulator integrated into the rigid part.

On observera encore ici que les conduits d'admission sont juxtaposés à la chambre de déshuilage de façon que la pièce rigide et unique précitée constitue avantageusement une pièce de faible hauteur.It will also be observed here that the intake ducts are juxtaposed with the deoiling chamber so that the aforementioned rigid and single part advantageously constitutes a part of low height.

Mais d'autres avantages et caractéristiques de l'invention apparaîtront mieux dans la description détaillée qui suit et se refère aux dessins annexés, donnés uniquement à titre d'exemple, et dans lesquels.However, other advantages and characteristics of the invention will appear more clearly in the detailed description which follows and refers to the appended drawings, given solely by way of example, and in which.

La figure 1 est une vue en coupe verticale de la partie supérieure d'un moteur équipé d'un dispositif conforme à cette invention, la coupe étant effectuée suivant la ligne I-I de la figure 2.FIG. 1 is a view in vertical section of the upper part of an engine equipped with a device according to this invention, the section being taken along the line I-I of FIG. 2.

La figure 2 est une vue en plan et de dessus de la partie supérieure du moteur.Figure 2 is a top plan view of the top of the engine.

La figure 3 est une vue en coupe suivant les lignes III-III de la figure 2.Figure 3 is a sectional view along lines III-III of Figure 2.

La figure 4 est une vue en coupe suivant la ligne IV-IV de la figure 1.Figure 4 is a sectional view along line IV-IV of Figure 1.

On voit sur ces figures la partie supérieure d'une culasse de moteur 1, surmontant plusieurs cylindres (non représentés) auxquels sont respectivement raccordés plusieurs conduits 2 d'admission d'air ou de mélange gazeux air-carburant, ces conduits pouvant communiquer avec un collecteur 3 de répartition des gaz et constituant avec ledit collecteur une pièce rigide et unique 4 formant un couvre-culasse.We see in these figures the upper part of an engine cylinder head 1, surmounting several cylinders (not shown) to which are respectively connected several ducts 2 for air intake or air-fuel gas mixture, these ducts being able to communicate with a gas distribution manifold 3 and constituting with said manifold a rigid and single piece 4 forming a cylinder head cover.

Conformément à l'invention, la pièce 4 formant couvre-culasse repose sur une cloison 5 appartenant à un support 6 pour un arbre à cames 7, lequel support est fixé de manière étanche sur le dessus de la culasse 1 et forme en quelque sorte une pièce intermédiaire entre ladite culasse et le couvre-culasse 4.According to the invention, the part 4 forming cylinder head cover rests on a partition 5 belonging to a support 6 for a camshaft 7, which support is tightly fixed on the top of the cylinder head 1 and somehow forms an intermediate piece between said cylinder head and the cylinder head cover 4.

Une telle construction, comme on le voit sur les figures 1 et 3, permet avantageusement d'une part de ménager sous la cloison 5 entre le support 6 d'arbre à cames 7 et la culasse 1 un espace creux 8, et de ménager d'autre part, dans le couvre-culasse 4, et de l'autre côté de la cloison 5, une chambre 9 de déshuilage des gaz provenant du carter inférieur du moteur, réaspirés par le circuit d'admission 2 et recyclés vers le moteur.Such a construction, as can be seen in FIGS. 1 and 3, advantageously makes it possible on the one hand to provide under the partition 5 between the camshaft support 6 and the cylinder head 1 a hollow space 8, and to provide d on the other hand, in the cylinder head cover 4, and on the other side of the partition 5, a chamber 9 for removing oil from the gases coming from the lower casing of the engine, re-aspirated by the intake circuit 2 and recycled to the engine.

L'espace creux 8 est relié au carter à huile (non représenté) du moteur par des canaux répérés en 10 sur la figure 3 et en 11 sur la figure 1.The hollow space 8 is connected to the oil sump (not shown) of the engine by channels identified at 10 in FIG. 3 and at 11 in FIG. 1.

La chambre de déshuilage 9 est reliée d'une part au collecteur de répartition 3 par des ouvertures 12, 13 qui seront décrites en détail plus loin, et cette chambre de déshuilage 9 est reliée d'autre part à l'espace creux 8 par des passages 14, 15 traversant la cloison 5 faisant partie du support 6 d'arbre à cames 7.The oil removal chamber 9 is connected on the one hand to the distribution manifold 3 by openings 12, 13 which will be described in detail below, and this oil removal chamber 9 is connected on the other hand to the hollow space 8 by passages 14, 15 passing through the partition 5 forming part of the camshaft support 6 7.

Le remplissage en huile du moteur peut être effectué par une goulotte 16 (figure 1) intégrée au couvre-culasse 4 et adjacente à la chambre de déshuilage 9, cette goulotte communiquant par un passage 17 avec l'espace creux 8 qui lui même communique avec le carter du moteur par le canal 11. On a montré en 18 un bouchon qui, comme connu en soi, permet l'obturation de l'entrée d'huile dans la goulotte 16.The engine oil can be filled by a chute 16 (FIG. 1) integrated into the cylinder head cover 4 and adjacent to the deoiling chamber 9, this chute communicating through a passage 17 with the hollow space 8 which itself communicates with the crankcase of the engine through the channel 11. A plug 18 has been shown which, as known per se, allows the oil inlet to the shutter 16 to be closed.

Comme on le voit bien sur les figures 1, 3 et 4, les passages 14, 15 et 17 susmentionnés sont respectivement constitués par des raccords tubulaires R montés entre la cloison 5 et la pièce rigide formant couvre-culasse 4, lesdits raccords R réalisant une étanchéité au niveau des plans de joint entre cloison et couvre-culasse.As can be seen in Figures 1, 3 and 4, the passages 14, 15 and 17 above mentioned are respectively constituted by tubular connections R mounted between the partition 5 and the rigid piece forming a cylinder head cover 4, said connections R providing a tightness at the joint surfaces between the partition and the cylinder head cover.

On a montré en 19 sur la figure 1 un orifice permettant le retour au carter via l'espace creux 8 et le canal 11 de l'huile séparée des gaz émis par le carter et qui remontent dans la chambre 9, comme on l'expliquera plus loin à propos du fonctionnement.There is shown in 19 in FIG. 1 an orifice allowing the return to the casing via the hollow space 8 and the channel 11 of the oil separated from the gases emitted by the casing and which rise in the chamber 9, as will be explained further on how it works.

On voit en 20 un régulateur de pression avantageusement intégré à la pièce rigide ou couvre-culasse 4 et dans lequel sont prévues les ouvertures 12, 13 précédemment mentionnées et permettant la communication entre la chambre 9 et le collecteur répartiteur 3 tant que la dépression dans le collecteur est inférieure à une valeur déterminée.20 shows a pressure regulator advantageously integrated into the rigid part or cylinder head cover 4 and in which the previously mentioned openings 12, 13 are provided and allowing communication between the chamber 9 and the distribution manifold 3 as long as the vacuum in the collector is less than a determined value.

On observera que ce régulateur, comme on le voit bien sur la figure 1, est incorporé au couvre-culasse 4 de façon que la hauteur du moteur demeure minimale vis-à-vis du capot C du véhicule, et, dans le même esprit, le collecteur 3 est disposé latéralement par rapport à la chambre 9 et les conduits d'admission 2 sont juxtaposés à la chambre de déshuilage 9 de façon à conférer aussi au moteur ou plus précisément au couvre-culasse 4, une hauteur minimale et par conséquent un espace libre suffisant vis-à-vis du capot C du véhicule. On comprend donc de la description qui précède que, grâce à l'invention, on utilise de façon optimale l'espace entre le capot C du véhicule et le moteur par imbrication dans le couvre-culasse 4 notamment des fonctions de déshuilage du gaz provenant du carter et de remplissage en huile de ce carter, lesquelles fonctions sont étroitement associées au collecteur-répartiteur 3 dans l'espace libre entre les conduits d'admission 2, et seront décrites ci-après.It will be observed that this regulator, as can be seen in FIG. 1, is incorporated into the cylinder head cover 4 so that the height of the engine remains minimal with respect to the hood C of the vehicle, and, in the same spirit, the manifold 3 is disposed laterally with respect to the chamber 9 and the intake ducts 2 are juxtaposed with the deoiling chamber 9 so as to also give the engine or more precisely to the cylinder head cover 4, a minimum height and therefore a Sufficient free space vis-à-vis the hood C of the vehicle. It is therefore understood from the foregoing description that, thanks to the invention, the space between the hood C of the vehicle and the engine is optimally used by nesting in the cylinder head cover 4 in particular for oil removal functions from the gas of the casing and of the oil filling of this casing, which functions are closely associated with the manifold-distributor 3 in the free space between the intake ducts 2, and will be described below.

La fonction de déshuilage des gaz est réalisée de la façon suivante.The gas deoiling function is performed as follows.

Les gaz émis dans le carter du moteur remontent dans la chambre de déshuilage ou de décantation par le conduit 10 de la culasse 1, puis par les passages 14 constitués par les raccords tubulaires R comme on le voit bien sur les figures 3 et 4 notamment. L'aspiration de ces gaz est réalisée grâce à la dépression qui règne dans le collecteur-répartiteur 3 qui communique avec la chambre 9 par les ouvertures 12 et 13, et cela au travers du régulateur de pression 20 dont le clapet 20a limite l'aspiration des gaz de carter vers l'admission en cas de forte dépression dans le collecteur. L'huile en suspension dans les gaz est recueillie dans la chambre 9 et retourne dans le carter d'huile du moteur via successivement les passages 15 et 19, l'espace creux 8 et le canal 11 dans la culasse 1. Les gaz débarrassés d'huile sont de leur côté, envoyés avec l'air ou le mélange gazeux air-carburant aux cylindres du moteur via les conduits d'admission 2, comme cela est matérialisé par des flèches sur les figures 1 et 2.The gases emitted in the engine casing rise into the oil removal or decantation chamber through the conduit 10 of the cylinder head 1, then through the passages 14 formed by the tubular connections R as can be seen in Figures 3 and 4 in particular. The suction of these gases is carried out thanks to the vacuum which prevails in the manifold-distributor 3 which communicates with the chamber 9 through the openings 12 and 13, and this through the pressure regulator 20 whose valve 20a limits the suction crankcase gases to the intake in the event of a high vacuum in the manifold. The oil in suspension in the gases is collected in the chamber 9 and returns to the engine oil pan via successively the passages 15 and 19, the hollow space 8 and the channel 11 in the cylinder head 1. The gases cleared d oil are on their side, sent with air or the air-fuel gas mixture to the engine cylinders via the intake ducts 2, as shown by arrows in Figures 1 and 2.

Quant à la fonction de remplissage en huile, elle s'effectue par la goulotte 16 qui est en communication avec l'espace creux 8 via le passage 17, l'huile s'écoulant vers le moteur par le canal 11 dans la culasse 1.As for the oil filling function, it takes place through the chute 16 which is in communication with the hollow space 8 via the passage 17, the oil flowing towards the engine through the channel 11 in the cylinder head 1.

On insistera ici sur le fait que les fonctions de déshuilage et de remplissage d'huile sont avantageusement intégrées au collecteur-répartiteur 3 dans l'espace libre entre les conduits d'admission 2, de façon à former ainsi une pièce monobloc 4 qui peut être fixée sur la culasse, par l'intermédiaire du support 6 d'arbre à cames 7 grâce à des vis 31 dont on voit l'implantation en 30 sur la figure 2.It will be emphasized here that the functions of deoiling and filling the oil are advantageously integrated into the manifold 3 in the free space between the intake ducts 2, so as to thus form a single piece 4 which can be fixed on the cylinder head, by means of the camshaft support 6 thanks to screws 31 which can be seen the layout at 30 in FIG. 2.

On a donc réalisé suivant l'invention un couvre-culasse monobloc et à fonctions multiples constituant un sous-ensemble d'admission compact et permettant l'amélioration du style notamment au niveau du capot du véhicule.A one-piece multi-function cylinder head cover was therefore produced according to the invention, constituting a compact intake sub-assembly and allowing the improvement of the style, in particular at the level of the hood of the vehicle.

Bien entendu, l'invention n'est nullement limitée au mode de réalisation décrit et illustré qui n'a été donné qu'à titre d'exemple.Of course, the invention is in no way limited to the embodiment described and illustrated, which has been given only by way of example.

Claims (6)

  1. Internal combustion engine comprising a device for the intake and the de-oiling of the crankcase gases and of the type essentially comprising a cylinder head (1) topping several cylinders to which are connected several gas intake ducts (2) which form together with a manifold (3) for the distribution of these gases a rigid part (4), characterized in that the said rigid part (4) constituting a cylinder head cover is resting upon a partition or the like (5) made fast to the cylinder head (1) and forming on one side of the partition a hollow space (8) connected to the crankcase of the engine by ducts (10, 11) and comprises on the other side of the partition a chamber (9) for de-oiling the crankcase gases suct up again by the intake circuit of the engine, which chamber is connected on the one hand to the manifold (3) by openings (12, 13) and on the other hand to the said hollow space (8) by passageways (14, 15) extending through the said partition.
  2. Engine according to claim 1, characterized in that the aforesaid partition (5) made fast to the cylinder head (1) constitutes a support (6) for the camshaft (7) fastened onto the top of the cylinder head.
  3. Engine according to claim 1 or 2, characterized in that the filling of the engine with oil is effected through a spout (16) adjacent to the de-oiling chamber (9) and communicating by a passageway (17) with the hollow space (8) underneath the partition (5).
  4. Engine according to one of claims 1 to 3, characterized in that the aforesaid passageways (14, 15, 17) are constituted by tubular connectors (R) mounted between the partition (5) and the aforesaid rigid part (4).
  5. Engine according to one of claims 1 to 4, characterized in that the aforesaid openings (12, 13) connecting the de-oiling chamber (9) to the manifold (3) are associated with a pressure regulator (20) integrated into the rigid part (4).
  6. Engine according to one of claims 1 to 5, characterized in that the intake pipes (2) are juxtaposed to the de-oiling chamber (9) so that the aforesaid rigid part (4) constitutes a part of small height
EP19910400561 1990-03-22 1991-02-28 Intake device and oil separator for an internal combustion engine and engine provided with this device Expired - Lifetime EP0448431B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9003680 1990-03-22
FR9003680A FR2660017B1 (en) 1990-03-22 1990-03-22 DEVICE FOR INTAKE AND DEHUILATION OF GASES IN AN INTERNAL COMBUSTION ENGINE AND ENGINE EQUIPPED WITH SUCH A DEVICE.

Publications (2)

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EP0448431A1 EP0448431A1 (en) 1991-09-25
EP0448431B1 true EP0448431B1 (en) 1993-07-07

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EP19910400561 Expired - Lifetime EP0448431B1 (en) 1990-03-22 1991-02-28 Intake device and oil separator for an internal combustion engine and engine provided with this device

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EP (1) EP0448431B1 (en)
DE (1) DE69100152T2 (en)
FR (1) FR2660017B1 (en)

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FR2774130B1 (en) * 1998-01-23 2000-03-10 Renault INTERNAL COMBUSTION ENGINE HAVING A COMPACT AIR INTAKE CIRCUIT
DE10320493A1 (en) * 2003-05-08 2004-12-02 Volkswagen Ag Combustion engine with crankcase ventilation has head cover ports connected to oil separator inlet, outlet so blow-by gas flows from crankcase via hollow chamber, oil separator to clean air path
DE102006038831B4 (en) 2006-08-18 2018-03-15 Volkswagen Ag Internal combustion engine with recirculation of blow-by gases
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DE102011116299A1 (en) * 2011-10-18 2013-04-18 Daimler Ag Intake module for an internal combustion engine
DE202012009863U1 (en) * 2012-10-16 2014-01-20 Reinz-Dichtungs-Gmbh Valve cover and internal combustion engine
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Also Published As

Publication number Publication date
DE69100152D1 (en) 1993-08-12
DE69100152T2 (en) 1994-02-10
EP0448431A1 (en) 1991-09-25
FR2660017B1 (en) 1992-07-31
FR2660017A1 (en) 1991-09-27

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