EP1199448B1 - Moteur à combustion avec un dispositif pour séparer les particules d'huile de lubrification des gas de carter - Google Patents

Moteur à combustion avec un dispositif pour séparer les particules d'huile de lubrification des gas de carter Download PDF

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Publication number
EP1199448B1
EP1199448B1 EP01124657A EP01124657A EP1199448B1 EP 1199448 B1 EP1199448 B1 EP 1199448B1 EP 01124657 A EP01124657 A EP 01124657A EP 01124657 A EP01124657 A EP 01124657A EP 1199448 B1 EP1199448 B1 EP 1199448B1
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EP
European Patent Office
Prior art keywords
casing
gases
particles
oil
crankcase
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Expired - Lifetime
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EP01124657A
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German (de)
English (en)
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EP1199448A1 (fr
Inventor
Pietro Bianchi
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Iveco SpA
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Iveco SpA
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    • 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
    • F01M2013/0427—Separating oil and gas with a centrifuge device the centrifuge device having no rotating part, e.g. cyclone

Definitions

  • the present invention relates to an internal-combustion engine provided with a purifying device for the separation of particles of lubricating oil from the crankcase blow-by gases.
  • crankcase breather circuit designed to discharge to the outside of said crankcase the so-called blow-by gases, i.e. gases which escape from the cylinders into the crankcase via the piston rings. This breathing is necessary both to prevent an increase in pressure inside the crankcase and to compensate for the variations in volume caused by the movement of the pistons.
  • the blow-by gases contain particles of finely atomised oil, as well as other impurities, for example particles of unburnt matter of carbon type (particulates).
  • the breather circuit is of the open type, i.e. it discharges the blow-by gases into the atmosphere; in this case, the oil and particulates have to be separated from the gases for obvious reasons relating to environmental and health protection (the particulates have carcinogenic effects).
  • the breather circuit is of the closed type and it recirculates the blow-by gases to the engine intake so as to ensure the complete combustion of the particulates.
  • the problem arises of purifying these gases of oil and particulates which tend to form resinous sediments on the components through which the gases pass before reaching the cylinders (particularly, on the valves and, in forced-induction engines, in the compressor and intercooler, thus compromising their efficiency as a result of the aerodynamic disturbance in the former and of the increased thermal resistance in the latter).
  • the combustion of any engine oil recirculated to the intake has harmful effects on the catalytic converter and on the Lambda sensor.
  • the oil entrained in the blow-by gases, whether it is recirculated or not, represents a consumption which, for a given volume of the reservoirs intended to contain it, typically the oil sumps, reduces the topping-up interval.
  • the known purifying devices are difficult to integrate into the engine and, particularly in the case of impact separators, they occupy additional space, as well as creating difficulties in respect of assembly and maintenance.
  • the object of the present invention is to devise an internal-combustion engine provided with a purifying device for the separation of particles of lubricating oil from the crankcase blow-by gases, which makes it possible in a simple and economical manner to obviate the drawbacks associated with the above-mentioned known purifying devices.
  • an internal-combustion engine comprising a cylinder head, a crankcase, a plurality of cylinders and breather means for the gases which have escaped into said crankcase through said cylinders and containing in suspension particles of lubricating oil
  • said breather means comprising a purifying device adapted to separate said particles of oil from said gases and having an inlet section for the gases to be purified, a first outlet section for the purified gases and a second outlet section for the separated oil particles
  • said purifying device is a column-type integrated unit accommodated in a vertical cavity of said crankcase and comprising a hollow outer casing defining said inlet section and said first and second outlet sections, deflector means of generally helical configuration accommodated inside said casing and adapted to divert said gases to be purified along an ascending helical conveying path for separating under centrifugal action the particles of oil from said gases, and a substantially tubular intermediate element accommodated inside said casing downwardly with
  • the present invention also relates to a purifying device for the separation of particles of lubricating oil from the blow-by gases of the crankcase of an internal-combustion engine, said device having an inlet section for the gases to be purified, a first outlet section for the purified gases and a second outlet section for the separated oil particles, characterised by comprising a column-type integrated unit designed to be accommodated in a vertical cavity of said crankcase and comprising a hollow outer casing defining said inlet section and said first and second outlet sections, deflector means of generally helical configuration accommodated inside said casing and adapted to divert said gases to be purified along an ascending helical conveying path for separating under centrifugal action the particles of oil from said gases, and a substantially tubular intermediate element accommodated inside said casing downwardly with respect to said deflector means, through which the gases to be purified flow internally and upwardly towards said deflector means, and which delimits externally with said casing a separate chamber for conveying under gravity towards said second outlet section the
  • the reference numeral 1 denotes an internal-combustion engine for a motor vehicle, in particular for a commercial vehicle (not shown).
  • the engine essentially comprises a cylinder head 2, a plurality of cylinders 3, a crankcase 4 and a sump 5 mounted under the crankcase 4 and designed to contain lubricating oil.
  • the engine 1 is also provided with a breather circuit 6 for the crankcase 4 for discharging to the outside of said crankcase 4 the so-called blow-by gases, i.e. the gases which escape between the cylinders and the associated pistons 7.
  • These gases contain particles of finely atomised lubricating oil in suspension and other impurities, for example solid particles of carbon type (particulates) partly formed by partially unburnt products of combustion and partly by solid impurities normally contained in the oil.
  • impurities for example solid particles of carbon type (particulates) partly formed by partially unburnt products of combustion and partly by solid impurities normally contained in the oil.
  • the breather circuit 6 comprises a purifying device 8 ( Figures 2-5), forming the subject-matter of the invention, for the separation of the particles of oil from the blow-by gases.
  • the purifying device 8 is formed by a column-type integrated unit, preferably made of plastics material, which is accommodated in a vertical cavity 10 of the crankcase 4 and has lower inlet section 11 for the gases to be purified, an upper outlet section 12 for the purified gases and a lower outlet section 13 for the separated oil particles.
  • the purifying device 8 comprises a hollow cylindrical outer casing having an axis A and defining said inlet and outlet sections 11,12,13, deflector means 16 of substantially helical configuration accommodated inside the casing 15 and adapted to divert the gases to be purified along an ascending helical conveying path so as to separate under centrifugal action the particles of oil from said gases, and a substantially tubular cylindrical intermediate element 17 having an axis A, which is accommodated inside the casing 15 downwardly with respect to the deflector means 16, through which the gases to be purified flow internally and which delimits with the casing 15 a separate chamber 18 for conveying under gravity towards the outlet section 13 the oil particles projected under centrifugal action by the deflector means 16 against an internal surface 19 of the casing 15.
  • the cavity 10 communicates at its lower end with a series of internal compartments 20 of the crankcase 4, through which the blow-by gases flow in operation, and at its upper end it opens into a further cavity 21 of said crankcase 4 suitably connected to the intake of the engine 1.
  • the cavity 10 is delimited by a lateral edge 22 of generally cylindrical configuration having an axis A of minimal section in the region of end portions 23, 24 thereof, respectively at the top and bottom, and in the region of an intermediate portion 25 thereof, and greater sections in the region of the connecting zones of said portions 23,24,25.
  • the purifying device 8 co-operates via a pair of sealing rings 26,27, preferably of O-ring type, respectively with the upper end portion 23 and with the intermediate portion 25 of the lateral edge 22 of the cavity 10 and it is releasably secured between the lower end portion 24.
  • the casing 15 is suitably made of two interconnected parts, in particular a cylindrical inverted cup-shaped upper element 30 accommodating the deflector means 16 and a substantially tubular cylindrical lower element 31.
  • the upper element 30 comprises a disc-shaped upper end wall 32, in which are provided three openings 33 defining the outlet section 12 for the purified gases and adapted to allow said gases to be conveyed into the cavity 21 of the crankcase 4, and from the latter to the intake of the engine 1, and a substantially cylindrical side wall 34 delimited internally by the surface 19 is provided with a plurality of straight vertical grooves 35 extending parallel to the axis A.
  • the grooves 35 serve to retain the oil particles which collide with the surface 19 of the side wall 34 and to allow said oil particles to descend under gravity while keeping them separate from the rising gases.
  • the internal surface 19 of the side wall 34 is of slightly frustoconical configuration and is of a section decreasing towards the upper end wall 32 so as to allow the upper element 30 to be removed from the mould.
  • the side wall 34 also has an outer substantially helical groove 36 which extends parallel to the conveying path of the gases and along which is provided a series of through-holes 37 serving to allow the oil particles separated from the rising gases to escape into the cavity 10 of the crankcase 4.
  • the side wall 34 is further provided with a series of windows 38 angularly spaced apart about the axis A and arranged in operation in the vicinity of and above the intermediate portion 25 of the lateral edge 22 of the cavity 10 and serving to convey into the interior of the chamber 18 of the casing 15 the oil particles escaping in the region of the holes 37 of the upper element 30.
  • the side wall 34 defines, in the vicinity of the upper end wall 32, an outer annular slot 39 which accommodates the sealing ring 26.
  • the lower element 31 comprises a substantially cylindrical side wall 40 having an axis A, which is connected with the side wall 34 of the upper element 30 and is substantially aligned externally with said side wall 34. More precisely, the side wall 40 is fitted, level with an upper end portion 41 thereof, on four tongues 42 projecting from a lower end edge of the side wall 34.
  • the lower element 31 extends substantially between the portions 24 and 25 of the lateral edge 22 of the cavity 10 and has, on an outer surface 43 of the side wall 40 thereof and in the region of said portion 25, an annular slot 44 accommodating the sealing ring 27.
  • the side wall 40 is provided, below the portion 25 of the lateral edge 22 of the cavity 10, with a pair of lateral openings 45 defining the inlet section 11 for the gases to be purified and communicating with the internal compartments 20 of the crankcase 4.
  • the side wall 40 of the lower element 31 is provided, on its outer surface 43, with a plurality of ribs 46 parallel to the axis A and defining between one another a plurality of gaps adapted to allow downward movement under gravity of the oil particles separated by impact against said side wall 40 as the gases enter the interior of the casing 15.
  • the crankcase 4 defines between the portions 24 and 25 of the lateral edge 22 of the cavity 10 a chamber 100 communicating with the internal compartments 20 of said crankcase 4 via two apertures 101 opposite respective lateral apertures 45 of the casing 15. In this way, the oil particles of larger dimensions collide with the surface 43 provided with the ribs 46 and, under gravity, they run downwards where they are returned into the compartments 20 via a syphon 54.
  • the lower element 31 further comprises integrally a cylindrical collar 47 accommodated inside a lower end portion 48 of the side wall 40 below the lateral apertures 45 and joined to said side wall 40 by an annular flange 49.
  • the collar 47 projects downwards with respect to the side wall 40 and is fitted on to an end portion of a duct 50 for conveying the separated oil particles towards the sump 5; therefore, the collar 47 defines the outlet section 13 for the separated oil particles.
  • the lower end portion 48 of the side wall 40 is further provided with apertures 51 for conveying into the syphon 54 particles of oil accumulated at the bottom of the chamber 100.
  • the syphon 54 is defined by a sleeve-like cover 53 force-fitted into the lower end portion 24 of the lateral edge 22 of the cavity 10, and by the lower element 31.
  • the syphon 54 is adapted to prevent the blow-by gases from penetrating directly into the interior of the casing 15 via the collar 47, while allowing, however, the oil separated in the chamber 100 after colliding with the ribbed surface 43 to return into the compartments 20.
  • the cover 53 comprises a cylindrical sleeve 55 inserted with radial clearance between the lower end portion 48 of the side wall 40 and the collar 47, and an annular flange 56, which projects radially from a lower end of the sleeve 55, is force-fitted into the portion 24 of the lateral edge 22 of the cavity 10 and it is provided with flutes which are deformable in contact with the crankcase 4 so as to ensure a fluidtight seal in downward direction.
  • the intermediate element 17 comprises a substantially cylindrical main portion 60 with an axis A and accommodating with radial clearance inside the lower element 31, and an upper end portion 61 which is also cylindrical with an axis A and which is of larger section than the section of the main portion 60, which is connected to said main portion 60 by a frustoconical portion 59 and which is engaged in a lower end portion of the side wall 34 of the upper element 30 in contact with the internal surface 19; in particular, the contact between the upper end portion 61 and the internal surface 19 of the upper element 30 takes place in a position above the windows 38.
  • the main portion 60 of the intermediate element 17 has a pair of lateral openings 62 arranged in the region of respective lateral apertures 45 of the lower element 31 and adapted to allow the gases to be purified to be admitted into the interior of said intermediate element 17.
  • the lateral apertures 45 of the lower element 31 are delimited by associated peripheral edges 63 bent over in an L-shape on corresponding peripheral edges 64 of the lateral apertures 62 of the intermediate element 17 and co-operating in contact with said peripheral edges so as to prevent the oil particles descending towards the duct 50 from being intercepted and entrained by the gases entering the casing 15.
  • the lateral apertures 65 divide the main portion 60 of the intermediate element 17 into two curved lamellar arms 65 extending on opposite sides with respect to the axis A and opposite and enclosed between respective C-shaped portions 66 of the side wall 40 ( Figure 6).
  • the chamber 18 for the downward movement of the oil particles is formed by an annular portion 18a defined between the side wall 40 of the lower element 31 and the portions 59 and 61 of the intermediate element 17, and by a pair of angular portions 18b which are diametrically opposed with respect to the axis A, and which communicate upwardly with the annular portion 18a and which are defined between the side wall 40 of said lower element 38 and the arms 65 of the intermediate element 17.
  • the lateral apertures 62 of the intermediate element 17 are closed at the bottom by respective feet 67 extending on diametrically opposite sides with respect to the axis A and arranged bearing on the inner flange 49 of the lower element 31.
  • the feet 67 contact, level with opposite ends thereof, respective lateral end portions of the lower edge of the arms 65 of the intermediate element 17 and they define with these lower edges associated outlet apertures 68 of the angular portions 18b of the chamber 18.
  • the feet 67 are extended into the interior of the intermediate element 17 and define a collar 69 with an axis A, which is externally cylindrical and internally prismatic, the function of which will be explained in the following paragraphs.
  • the deflector means 16 are defined by a helical wall 70 wholly accommodated inside the upper element 30 and extending around a central rod 71 which has an axis A and which is supported, at opposite prismatic ends 72,73 thereof, by the collar 69 of the intermediate element 17 and by end wall 32 of the upper element 30. More precisely, the lower end 72 of the rod 71 engages the collar 69, whereas the upper end 72 engages an opening 74 of complementary shape provided in the end wall 32 of the upper element 30.
  • blow-by gases present in the crankcase 4 pass through the purifying device 8 from the bottom upwards as a result of the pressure difference existing between the internal compartments 20 of the crankcase 4 and the cavity 21 connected to the intake of the engine 1.
  • blow-by gases originating from the internal compartments 20 of the crankcase 4 enter the cavity 10 from the bottom through lateral apertures in this latter.
  • the blow-by gases then fill the chamber 100 between the portions 24 and 25 of the lateral edge 22 of said cavity 10.
  • An initial coarse separation of the oil particles of larger size takes place in this zone, which particles collide with the outer surface 43 of the lower element 31 of the casing 15 and they descend under gravity along the gaps formed between the ribs 46.
  • Said oil particles accumulate at the bottom of the chamber 100, from where they are readmitted into the compartments 20 of the crankcase 4 via the syphon 54.
  • the function of the syphon 54 is to enable the oil to pass from the cavity 10 to the compartments 20 in which a slightly higher pressure prevails.
  • the oil accumulated at the bottom of the chamber 100 passes through the apertures 51 in the side wall 40 of the lower element 31 to the interior of the casing 15 and they accumulate outside the cover 53 until reaching such a level as to enable the fraction situated uppermost to pass beyond said cover 53; this fraction can then flow into the compartments 20 of the crankcase 4.
  • blow-by gases then enter the interior of the casing 15 and of the intermediate element 17 through the lateral apertures 45,62 and they start to rise again through the purifying device 8 towards the upper outlet section 12.
  • the gases encounter the helical wall 70 which constrains them to undergo helicoidal movement; the range of centrifugal acceleration which results from this helicoidal movement of the fluid stream projects the particles of oil in suspension, being of higher density than that of the gases, against the internal surface 19 of the upper element 30, along which they coalesce.
  • the oil particles which collide with the surface 19 of the upper element 30 partly descend under gravity along the grooves 35 remaining separated from the fluid stream, and partly they escape into the cavity 10 through the holes 37 so as then to re-enter lower down the interior of the chamber 18 of the casing 15 through the windows 38.
  • the oil descends along the annular portion 18a and the angular portions 18b of the chamber until it enters the duct 50 through the outlet apertures 68, from where it is conveyed towards the sump 5.
  • the peripheral edges 63 of the lateral apertures 45 of the lower element 31 are closed on the peripheral edges 64 of the lateral apertures 62 of the intermediate element 17, the descending oil still remains separated from the flow of gas entering the purifying device 8.
  • the purifying device 8 can be easily integrated inside the engine 1 by being inserted in a vertical cavity (10) of the crankcase of said engine, without occupying any additional space.
  • the purifying device 8 is composed of a limited number of components (five to be exact) which are preferably made of plastics material and which can easily be assembled together and their total cost is reasonable.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)

Claims (14)

  1. Moteur à combustion interne (1) comprenant une culasse (2), un carter moteur (4), une pluralité de cylindres (3) et un moyen de reniflard (6) pour les gaz qui se sont échappés par lesdits cylindres (3) à l'intérieur dudit carter moteur (4) et qui contiennent en suspension des particules d'huile de graissage, ledit moyen de reniflard (6) comprenant un dispositif de purification (8) adapté pour séparer lesdites particules d'huile desdits gaz et présentant une section d'entrée (11) pour les gaz à purifier, une première section de sortie (12) pour les gaz purifiés et une seconde section de sortie (13) pour les particules d'huile séparées, caractérisé en ce que ledit dispositif de purification (8) est une unité intégrée de type à colonne logée dans une cavité verticale (10) dudit carter (4) et comprenant une enveloppe extérieure creuse (15) définissant ladite section d'entrée (11) et lesdites première et seconde sections de sortie (12, 13), un moyen de déflecteur (16) de configuration généralement hélicoïdale logé à l'intérieur de ladite enveloppe (15) et adapté pour détourner lesdits gaz devant être purifiés le long d'un chemin de transport hélicoïdal ascendant de façon à séparer, sous l'action de la force centrifuge, les particules d'huile desdits gaz, et un élément intermédiaire sensiblement tubulaire (17) logé à l'intérieur de ladite enveloppe (15) vers le bas par rapport audit moyen de déflecteur (16), à travers lequel les gaz à purifier s'écoulent intérieurement et vers le haut en direction dudit moyen de déflection (16), et qui délimite extérieurement avec ladite enveloppe (15) une chambre distincte (18) pour transporter par gravité vers la seconde section de sortie (13) les particules d'huile projetées par action centrifuge contre une surface intérieure (19) de ladite enveloppe (15) adjacente audit moyen de déflecteur (16).
  2. Moteur selon la revendication 1, caractérisé en ce que ledit moyen de déflecteur (16) est logé dans une partie supérieure (30) de ladite enveloppe (15) présentant, le long de ladite surface intérieure (19), une pluralité de rainures verticales (35) pour permettre aux particules d'huile de descendre par gravité tout en les maintenant séparées du flux de gaz ascendants.
  3. Moteur selon la revendication 2, caractérisé en ce que ladite partie supérieure (30) de ladite enveloppe (15) présente une pluralité de trous traversants (37) séparés en une succession parallèle audit chemin de transport pour lesdits gaz de façon à permettre le passage dans ladite cavité (10) dudit carter moteur (4) des particules d'huile projetées vers ladite surface intérieure (19) de ladite enveloppe (15).
  4. Moteur selon la revendication 3, caractérisé en ce que ladite partie supérieure (30) présente une pluralité d'orifices inférieurs en fenêtre (38) pour permettre aux particules d'huile qui ont échappé auxdits trous (37) d'être amenées à l'intérieur de ladite chambre (18).
  5. Moteur selon l'une quelconque des revendications précédentes, caractérisé en ce que ladite première section de sortie (12) est définie par au moins une ouverture supérieure (33) disposée sur une paroi (32) de l'extrémité supérieure de ladite enveloppe (15).
  6. Moteur selon l'une quelconque des revendications précédentes, caractérisé en ce que ladite section d'entrée (11) est définie par au moins une première ouverture latérale (45) disposée sur une partie inférieure (31) de ladite enveloppe (15).
  7. Moteur selon la revendication 6, caractérisé en ce que ladite partie inférieure (31) de ladite enveloppe (15) présente à l'extérieur une pluralité de nervures verticales (46) délimitant entre elles un certain nombre de creux adaptés pour permettre, par gravité, une circulation vers le bas des particules d'huile séparées par impact contre ladite partie inférieure (31) lors de l'étape d'entrée desdits gaz dans ladite enveloppe (15) à travers ladite première ouverture latérale (45).
  8. Moteur selon l'une quelconque des revendications 5 à 8, caractérisé en ce que ladite seconde section de sortie (13) est définie par une ouverture inférieure (47) [sic] de ladite enveloppe (15) opposée à ladite première ouverture supérieure (33) et est reliée à un conduit (50) pour transporter les particules d'huile séparées à travers un carter à huile collectant l'huile dudit moteur (1), ledit élément intermédiaire (17) s'étendant avec un jeu à l'intérieur de ladite partie inférieure (31) de ladite enveloppe (15), définissant vers le bas une sortie (68) vers ladite ouverture inférieure (47), et étant muni d'au moins une seconde ouverture latérale (62) disposée de niveau avec ladite première ouverture latérale (45) et étant délimité par un bord périphérique (64) coopérant par contact avec un bord périphérique (63) de ladite première ouverture latérale (45) de façon à empêcher les particules d'huile descendant par ledit conduit (50) d'être interceptées et entraînées par le flux de gaz pénétrant dans ladite enveloppe (15).
  9. Moteur selon la revendication 8, caractérisé en ce que ladite partie inférieure (31) de ladite enveloppe (15) et ledit élément intermédiaire (17) comprennent respectivement deux desdites premières ouvertures latérales (45) et deux desdites secondes ouvertures latérales (62).
  10. Moteur selon la revendication 8 ou 9, caractérisé en ce que ledit dispositif de purification (8) comprend un siphon (54) disposé entre le fond de ladite cavité (10) dudit carter moteur (4), ladite partie inférieure (31) de ladite enveloppe (15) et un compartiment intérieur (20) du carter moteur (4) de façon à interdire l'entrée de gaz à l'intérieur de ladite enveloppe (15) à travers ladite ouverture inférieure (47).
  11. Moteur selon l'une quelconque des revendications 6 à 10, caractérisé en ce que lesdites parties inférieure et supérieure de ladite enveloppe (15) sont définies par des éléments distincts (30, 31) qui sont reliés l'un à l'autre.
  12. Moteur selon l'une quelconque des revendications précédentes, caractérisé en ce que ledit moyen de déflecteur (16) est formé par une paroi hélicoïdale s'étendant autour d'une tige centrale verticale (71) supportée à ses extrémités opposées (72, 73) entre ladite enveloppe (15) et ledit élément intermédiaire (17).
  13. Moteur selon l'une quelconque des revendications précédentes, caractérisé en ce que ledit dispositif de purification (8) est fait d'un matériau plastique.
  14. Dispositif de purification (8) destiné à la séparation de particules d'huile de graissage des gaz de fuite du carter moteur (4) d'un moteur à combustion interne (1), ledit dispositif comprenant une section d'entrée (11) pour les gaz à purifier, une première section de sortie (12) pour les gaz purifiés et une seconde section de sortie (13) pour les particules d'huile séparées, caractérisé en ce que ledit dispositif de purification (8) est une unité intégrée de type à colonne logée dans une cavité verticale (10) dudit carter moteur (4) et comprenant une enveloppe extérieure creuse (15) définissant ladite section d'entrée (11) et lesdites première et seconde sections de sortie (12, 13), un moyen de déflecteur (16) de configuration généralement hélicoïdale logé à l'intérieur de ladite enveloppe (15) et adapté pour détourner lesdits gaz devant être purifiés le long d'un chemin de transport hélicoïdal ascendant de façon à séparer, sous l'action de la force centrifuge, les particules d'huile desdits gaz, et un élément intermédiaire sensiblement tubulaire (17) logé à l'intérieur de ladite enveloppe (15) vers le bas par rapport audit moyen de déflecteur (16), à travers lequel les gaz à purifier s'écoulent intérieurement et vers le haut en direction dudit moyen de déflection (16), et qui délimite extérieurement avec ladite enveloppe (15) une chambre distincte (18) pour transporter par gravité vers la seconde section de sortie (13) les particules d'huile projetées par action centrifuge contre une surface intérieure (19) de ladite enveloppe (15) adjacente audit moyen de déflecteur (16).
EP01124657A 2000-10-17 2001-10-16 Moteur à combustion avec un dispositif pour séparer les particules d'huile de lubrification des gas de carter Expired - Lifetime EP1199448B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO000973 2000-10-17
IT2000TO000973A IT1321034B1 (it) 2000-10-17 2000-10-17 Motore endotermico provvisto di un dispositivo di depurazione per laseparazione di particelle di olio lubrificante dai gas di sfiato del

Publications (2)

Publication Number Publication Date
EP1199448A1 EP1199448A1 (fr) 2002-04-24
EP1199448B1 true EP1199448B1 (fr) 2006-01-18

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EP01124657A Expired - Lifetime EP1199448B1 (fr) 2000-10-17 2001-10-16 Moteur à combustion avec un dispositif pour séparer les particules d'huile de lubrification des gas de carter

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EP (1) EP1199448B1 (fr)
AT (1) ATE316197T1 (fr)
DE (1) DE60116698T2 (fr)
ES (1) ES2256135T3 (fr)
IT (1) IT1321034B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
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ES2256135T3 (es) 2006-07-16
ATE316197T1 (de) 2006-02-15
EP1199448A1 (fr) 2002-04-24
DE60116698T2 (de) 2006-08-24
ITTO20000973A1 (it) 2002-04-17
ITTO20000973A0 (it) 2000-10-17
DE60116698D1 (de) 2006-04-06
IT1321034B1 (it) 2003-12-30

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