EP4069951A1 - Oil decanter comprising a fresh air chamber - Google Patents

Oil decanter comprising a fresh air chamber

Info

Publication number
EP4069951A1
EP4069951A1 EP20801275.7A EP20801275A EP4069951A1 EP 4069951 A1 EP4069951 A1 EP 4069951A1 EP 20801275 A EP20801275 A EP 20801275A EP 4069951 A1 EP4069951 A1 EP 4069951A1
Authority
EP
European Patent Office
Prior art keywords
chamber
oil
cylinder block
decanter
fresh air
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
EP20801275.7A
Other languages
German (de)
French (fr)
Other versions
EP4069951B1 (en
Inventor
Jean-Philippe CARDINAL
Thomas VENEZIANI
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.)
Renault SAS
Nissan Motor Co Ltd
Original Assignee
Renault SAS
Nissan Motor Co Ltd
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 Renault SAS, Nissan Motor Co Ltd filed Critical Renault SAS
Publication of EP4069951A1 publication Critical patent/EP4069951A1/en
Application granted granted Critical
Publication of EP4069951B1 publication Critical patent/EP4069951B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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
    • F01M2013/0038—Layout of crankcase breathing systems
    • F01M2013/0044—Layout of crankcase breathing systems with one or more valves
    • 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
    • F01M2013/0038—Layout of crankcase breathing systems
    • F01M2013/005—Layout of crankcase breathing systems having one or more deoilers
    • 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
    • F01M2013/027—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure with a turbo charger or compressor

Definitions

  • OIL DECANTER INCLUDING A FRESH AIR CHAMBER
  • the invention relates to an oil separator for an internal combustion engine.
  • the invention also relates to an internal combustion engine comprising such an oil separator.
  • the invention relates to a vehicle comprising such an internal combustion engine and / or such an oil separator.
  • crankcase gases are commonly referred to as “blow-by” or “blowby” gases.
  • an internal combustion engine generally includes a means for circulating these blowby gases so as to discharge them from the cylinder block to an oil separator.
  • a ventilation pipe connecting the air intake of the internal combustion engine to the cylinder block so as to bring fresh air to the cylinder block.
  • the aim of the invention is to provide an oil decanter remedying
  • the invention allows a non-return valve to be easily integrated into a ventilation pipe supplying fresh air.
  • the invention relates to an oil separator for an internal combustion engine, in particular an oil separator intended to be arranged on a cylinder block of such an internal combustion engine, the oil separator comprising : a chamber an inlet made in the chamber intended to admit fresh air, in particular fresh air taken downstream of an air filter and / or upstream of a turbocharger, and an outlet made in the chamber intended to send fresh air into a cylinder block, in particular in the lower part of a connecting rod chamber, so as to expel blow-by gases and / or oil vapors from such a cylinder block .
  • the fresh air chamber may be adjacent to an oil decanter settling chamber.
  • the oil decanter may include a non-return valve arranged at the inlet so as to allow a flow to escape from the chamber only through the outlet.
  • the decanter may include an oil return tubing sealingly passing through the chamber.
  • the chamber can be a conduit extending between the inlet and the outlet.
  • the pipe can pass through the settling chamber of the oil settling tank.
  • the invention also relates to an internal combustion engine comprising a cylinder block, in particular an internal combustion engine comprising an intake comprising an air filter and / or a turbocharger, comprising an oil separator as defined above and a discharge pipe. air ventilation extending between the inlet of the chamber and a fresh air sampling orifice, in particular a sampling orifice formed downstream of the air filter and / or upstream of the turbocharger.
  • the invention also relates to a vehicle, in particular a motor vehicle, comprising an internal combustion engine as defined above and / or an oil separator as defined above.
  • Figure 1 is a schematic view of a vehicle comprising an internal combustion engine according to one embodiment.
  • Figure 2 is a schematic view of an internal combustion engine with an oil separator according to one embodiment of the invention.
  • Figure 3 is a schematic view of an internal combustion engine provided with an oil separator according to a first variant of the embodiment of the invention.
  • Figure 4 is a schematic view of an internal combustion engine provided with an oil separator according to a second variant of the embodiment of the invention.
  • Figure 5 is a top view of a cylinder block to which is fixed an oil separator according to the embodiment.
  • Figure 6 is a sectional view of the cylinder block and the oil decanter along a plane parallel to an axis of a cylinder passing through an axis of a fresh air inlet in the oil decanter according to embodiment.
  • Figure 7 is a side view of the cylinder block and the oil separator according to the embodiment.
  • Figure 8 is a sectional view of the cylinder block and the oil separator along a plane perpendicular to the axes of the cylinders and passing through an air chamber of the oil separator according to the embodiment.
  • FIG. 9 is a view in partial section of the cylinder block and of the oil separator along a plane parallel to a cylinder axis and passing through an air chamber of the oil separator according to the first variant of the embodiment of invention.
  • FIG. 10 is another view in partial section of the cylinder block and the oil separator along a plane parallel to a cylinder axis and passing through an air chamber of the oil separator according to the embodiment of the FIG. invention.
  • FIG. 11 is another view in section of the cylinder block and of the oil separator along a plane parallel to a cylinder axis and passing through an air chamber of the oil separator according to the embodiment of the invention. .
  • FIG. 1 schematically illustrates a vehicle 1, for example a motor vehicle.
  • the vehicle 1 comprises an internal combustion engine 2.
  • the internal combustion engine 2 is for example the only means of traction and / or propulsion of the vehicle 1.
  • an electric means for example a means comprising an electric motor and an electric energy storage means, also participates in the traction and / or the propulsion of the vehicle 1, one then speaks of a hybrid vehicle.
  • the internal combustion engine 2 comprises a cylinder block 3.
  • the cylinder block (s) 3 comprises at least one cylinder.
  • the cylinder block 3 comprises three cylinders 3C.
  • the internal combustion engine 2 further comprises an oil separator 10.
  • the oil separator 10 is arranged on the cylinder block 3.
  • the term “arranged” is understood to mean that the oil separator is fixed to the crankcase. cylinder 3, or even that the oil separator is integrated into the cylinder block.
  • the oil separator can be part of the cylinder block.
  • the internal combustion engine 2 comprises an intake 5.
  • the intake 5 comprises an air filter 7 and / or a turbocharger 8.
  • the engine 2 further comprises a pipe 6 of air ventilation.
  • the cylinder block 3 comprises a connecting rod chamber 4.
  • an oil layer H remains at the bottom, in a vertical direction, of the connecting rod chamber 4. .
  • the casing of the oil decanter 10 comprises a chamber 20 independent of the settling.
  • the chamber 20 is intended to receive fresh air F.
  • this fresh air F is taken downstream of the air filter 7 and / or upstream of the turbocharger 8.
  • the fresh air F arrives in the chamber 20 via the pipe 6.
  • an inlet 21 is made in the chamber 20.
  • An outlet 22 is made in the chamber 20 so as to open into the cylinder block 3, as illustrated in FIG. 11.
  • the outlet 22 is intended to evacuate the air from the air chamber 20 and to send this fresh air F within the cylinder block 3.
  • the fresh air F is preferably sent to the level of the connecting rod chamber 4 so in expelling the blowby gases and / or oil vapors present within the cylinder block 3.
  • the pipe 6 extends between the inlet 21 of the chamber 20 and a sampling orifice 9 of fresh air.
  • the sampling orifice 9 is therefore provided downstream of the air filter 7.
  • a pipe 11 allows a return of settling oil RH by making the internal volume of the settling tank 10 communicate with the volume of an oil sump passing through the cylinder crankcase.
  • the casing of the oil separator 10 comprises a non-return valve 30.
  • the non-return valve 30 is integrated into the casing of the oil separator 10 in such a manner. to control the blockage of the inlet 21.
  • this non-return valve only a flow discharging from the chamber 20 through the outlet 22 is possible.
  • the settling tank 10 comprises a pipe 11 for returning the settling oil RH through the chamber 20.
  • the pipe 11 passes through the chamber 20 in a sealed manner.
  • the outlet. 22 is provided below the pipe 11, as illustrated in Figure 3.
  • the fresh air chamber 20 is a duct.
  • the internal volume of the chamber is equal, or substantially equal, to the internal volume of the duct 25.
  • the duct 25 extends between the inlet 21 and the outlet 22, for example in a rectilinear manner.
  • the duct 25 is arranged, for example horizontally or substantially horizontally, in a lower part of the settling tank.
  • the pipe 25 is arranged under a junction 12 between the pipe 11 for the return of the settling oil RH and the settling tank 10. The pipe 25 can thus be in a settling chamber 13 of the settling tank.
  • the function of the ventilation pipe 6 is to bring fresh air F, preferably filtered, into the cylinder block, in particular in the lower part of the connecting rod chamber 4.
  • the blowby gases created by the combustion of the mixture air-fuel and oil vapors are thus expelled and pass through the oil separator 10 via the inlet pipe.
  • the settling tank or settling box arranged outside the engine, more particularly outside the cylinder block 3 receives the blowby gases coming from the cylinder block, in particular from the connecting rod chamber.
  • the motor 2 preferably comprises a first channel 14 connecting for example the interior volume of the settling tank, from an upper part 15 of the settling tank for example, to an air distributor 40.
  • the engine 2 also comprises a second channel 16 connecting for example the internal volume of the settling tank, from a lateral part 17 of the settling tank for example, to the inlet 5, for example upstream of the turbocharger 8.
  • the blowby gases BB trapped in the oil decanter due to the ventilation of fresh air F within the cylinder block can escape through the first channel 14 and / or through the second channel 16.
  • blowby gases BB are then brought to join the intake 5 and therefore to be injected, for example at a cylinder head 18, as intake gases from the turbocharger 8 and / or directly from the air filter 7.
  • an advantage of having the fresh air next to the settling is to allow a t heat transfer between the blow-by and the fresh air which promotes the settling of oil vapors.
  • the deoiled gases benefit from cooling.
  • the non-return valve of the cylinder block ventilation circuit is integrated into the oil decanter by creating an air chamber inside it.
  • the air chamber communicates with the cylinder block, in particular at the level of the connecting rod chamber, by a tapping sealed at the interface between the outlet of the air chamber and the cylinder block, for example by using a gasket.
  • the pipe 6 performs a second function, namely to keep the interior of the cylinder block always at vacuum thanks to the non-return valve.
  • the non-return valve prevents blowby gases from flowing back to the air inlet through pipe 6, in particular in the event of overpressure.
  • the collection of the fresh air F takes place downstream of the air filter 7 and upstream of the compressor 8 so as to arrive in the oil decanter 10.
  • the volume of the settling tank communicates in the cylinder block 3.
  • the non-return valve is placed on the path of the pipe 6, near the cylinder block 3 without however being fixed to the cylinder block 3. This results in a simplification of the cylinder block since it does not require any element of the cylinder block. specific fixing for the non-return valve, such as a screw and / or an internal thread and / or a receiving bore. Thus, given the elimination of this fastener, the cost of the functions of ventilation and settling of the blowby gases is lowered.
  • the path of the pipe 6 is simplified with a reduction in the number of parts forming the path, in particular by having less curvature, in particular less curvature at a small radius. Note that only the oil decanter is modified to simplify the ventilation pipe.
  • the pipe 6 is more accessible for intervention, the assembly-disassembly of the pipe being facilitated, both in the factory for the assembly of the engine and after-sales.
  • the pipe 11 and therefore the blowby gas circuit BB discharged due to the ventilation of fresh air F passes through the air chamber 20. This results in a cooling of the oil at the level of the passage of the filled chamber 20 fresh air.
  • the fresh air F is a priori at a temperature lower than that of the oil.
  • the solution according to the invention therefore achieves the desired objective of simplifying a blowby gas ventilation pipe in a cylinder block and easily integrating a non-return valve, and has the following advantages:
  • the cost is low, preferably only the settling tank is modified;

Abstract

The invention relates to an oil decanter (10) for an internal combustion engine (2), which oil decanter is intended to be arranged on a cylinder block (3), the oil decanter (10) comprising a chamber (20), an inlet (21) provided in the chamber (20) and intended to admit fresh air (F), and an outlet (22) provided in the chamber (20) and intended to circulate fresh air (F) within a cylinder block (3), in particular in the lower portion of a chamber of connecting rods (4), such that blow-by gases and/or oil vapours (BB) are expelled from such a cylinder block (3).

Description

m ne . DECANTEUR D'HUILE COMPRENANT UNE CHAMBRE D'AIR FRAIS m not. OIL DECANTER INCLUDING A FRESH AIR CHAMBER
Domaine Technique de l'invention Technical field of the invention
L’invention concerne un décanteur d’huile pour moteur à combustion 5 interne. L’invention porte aussi sur un moteur à combustion interne comprenant un tel décanteur d’huile. L’invention porte enfin sur un véhicule comprenant un tel moteur à combustion interne et/ou un tel décanteur d’huile. The invention relates to an oil separator for an internal combustion engine. The invention also relates to an internal combustion engine comprising such an oil separator. Finally, the invention relates to a vehicle comprising such an internal combustion engine and / or such an oil separator.
10 Etat de la technique antérieure 10 State of the prior art
Au cours de la combustion d’un moteur à combustion interne, des gaz de combustion s’échappent depuis une chambre de combustion vers un carter-cylindres. Une telle fuite de gaz engendre donc la présence de gaz dans le carter cylindres. Ces gaz de carter sont communément appelés 15 gaz « blow-by » ou « blowby » (terme anglo-saxon). During the combustion of an internal combustion engine, combustion gases escape from a combustion chamber to a cylinder block. Such a gas leak therefore generates the presence of gas in the cylinder block. These crankcase gases are commonly referred to as "blow-by" or "blowby" gases.
Ainsi, un moteur à combustion interne comprend généralement un moyen pour faire circuler ces gaz blowby de sorte à les évacuer du carter- cylindres vers un décanteur d’huile. En effet, il est généralement prévu un 20 tuyau de ventilation reliant l’admission d’air du moteur à combustion interne au carter cylindres de sorte à amener de l’air frais au niveau du carter-cylindres. Thus, an internal combustion engine generally includes a means for circulating these blowby gases so as to discharge them from the cylinder block to an oil separator. Indeed, there is generally provided a ventilation pipe connecting the air intake of the internal combustion engine to the cylinder block so as to bring fresh air to the cylinder block.
Toutefois l’intégration d’un tel tuyau de ventilation au sein du compartiment 25 moteur très contraint, et au niveau d’un carter cylindres dont la forme est optimisée, est complexe. However, the integration of such a ventilation pipe within the very constrained engine compartment, and at the level of a cylinder block whose shape is optimized, is complex.
Présentation de l'invention Presentation of the invention
Le but de l’invention est de fournir un décanteur d’huile remédiant auxThe aim of the invention is to provide an oil decanter remedying
30 inconvénients ci-dessus, notamment sans interférer sur les pièces environnantes d’un moteur à combustion interne. En particulier, l’invention permet d’intégrer un clapet anti-retour aisément au niveau d’un tuyau de ventilation apportant de l’air frais. 30 above drawbacks, in particular without interfering with the surrounding parts of an internal combustion engine. In particular, the invention allows a non-return valve to be easily integrated into a ventilation pipe supplying fresh air.
Résumé de l'invention Summary of the invention
Pour atteindre cet objectif, l’invention porte sur un décanteur d’huile pour moteur à combustion interne, notamment un décanteur d’huile destiné à être agencé sur un carter cylindres d’un tel moteur à combustion interne, le décanteur d’huile comprenant : une chambre une entrée ménagée dans la chambre destinée à admettre de l’air frais, notamment de l’air frais prélevé en aval d’un filtre à air et/ou en amont d’un turbocompresseur, et une sortie ménagée dans la chambre destinée à envoyer de l’air frais au sein d’un carter cylindres, notamment en partie inférieure d’une chambre de bielles, de sorte à chasser des gaz blow-by et/ou des vapeurs d’huile d’un tel carter cylindres. To achieve this objective, the invention relates to an oil separator for an internal combustion engine, in particular an oil separator intended to be arranged on a cylinder block of such an internal combustion engine, the oil separator comprising : a chamber an inlet made in the chamber intended to admit fresh air, in particular fresh air taken downstream of an air filter and / or upstream of a turbocharger, and an outlet made in the chamber intended to send fresh air into a cylinder block, in particular in the lower part of a connecting rod chamber, so as to expel blow-by gases and / or oil vapors from such a cylinder block .
La chambre d’air frais peut jouxter une chambre de décantation du décanteur d’huile. The fresh air chamber may be adjacent to an oil decanter settling chamber.
Le décanteur d’huile peut comprendre un clapet anti-retour agencé au niveau de l’entrée de sorte à ne permettre à un flux de s’évacuer de la chambre que par la sortie. The oil decanter may include a non-return valve arranged at the inlet so as to allow a flow to escape from the chamber only through the outlet.
Le décanteur peut comprendre une tubulure de retour d’huile traversant de manière étanche la chambre. The decanter may include an oil return tubing sealingly passing through the chamber.
La chambre peut être un conduit s’étendant entre l’entrée et la sortie. The chamber can be a conduit extending between the inlet and the outlet.
Le conduit peut traverser la chambre de décantation du décanteur d’huile. L’invention porte encore sur un moteur à combustion interne comprenant un carter cylindres, notamment un moteur à combustion interne comprenant une admission comprenant un filtre à air et/ou un turbocompresseur, comprenant un décanteur d’huile tel que défini précédemment et un tuyau de ventilation d’air s’étendant entre l’entrée de la chambre et un orifice de prélèvement d’air frais, notamment un orifice de prélèvement ménagé en aval du filtre à air et/ou en amont du turbocompresseur. The pipe can pass through the settling chamber of the oil settling tank. The invention also relates to an internal combustion engine comprising a cylinder block, in particular an internal combustion engine comprising an intake comprising an air filter and / or a turbocharger, comprising an oil separator as defined above and a discharge pipe. air ventilation extending between the inlet of the chamber and a fresh air sampling orifice, in particular a sampling orifice formed downstream of the air filter and / or upstream of the turbocharger.
L’invention porte encore sur un véhicule, notamment un véhicule automobile, comprenant un moteur à combustion interne tel que défini précédemment et/ou un décanteur d’huile tel que défini précédemment. The invention also relates to a vehicle, in particular a motor vehicle, comprising an internal combustion engine as defined above and / or an oil separator as defined above.
Présentation des figures Presentation of figures
Ces objets, caractéristiques et avantages de la présente invention seront exposés en détail dans la description suivante d’un mode de réalisation particulier fait à titre non-limitatif en relation avec les figures jointes parmi lesquelles : These objects, characteristics and advantages of the present invention will be explained in detail in the following description of a particular embodiment made without limitation in relation to the accompanying figures, among which:
[Fig. 1] La figure 1 est une vue schématique d’un véhicule comprenant un moteur à combustion interne selon un mode de réalisation. [Fig. 1] Figure 1 is a schematic view of a vehicle comprising an internal combustion engine according to one embodiment.
[Fig. 2] La figure 2 est une vue schématique d’un moteur à combustion interne doté d’un décanteur d’huile selon un mode de réalisation de l’invention. [Fig. 2] Figure 2 is a schematic view of an internal combustion engine with an oil separator according to one embodiment of the invention.
[Fig. 3] La figure 3 est une vue schématique d’un moteur à combustion interne doté d’un décanteur d’huile selon une première variante du mode de réalisation de l’invention. [Fig. 3] Figure 3 is a schematic view of an internal combustion engine provided with an oil separator according to a first variant of the embodiment of the invention.
[Fig. 4] La figure 4 est une vue schématique d’un moteur à combustion interne doté d’un décanteur d’huile selon une deuxième variante du mode de réalisation de l’invention. [Fig. 4] Figure 4 is a schematic view of an internal combustion engine provided with an oil separator according to a second variant of the embodiment of the invention.
[Fig. 5] La figure 5 est une vue de dessus d’un carter cylindres sur lequel est fixé un décanteur d’huile selon le mode de réalisation. [Fig. 6] La figure 6 est une vue en coupe du carter cylindres et du décanteur d’huile selon un plan parallèle à un axe d’un cylindre passant par un axe d’une entrée d’air frais dans le décanteur d’huile selon le mode de réalisation. [Fig. 5] Figure 5 is a top view of a cylinder block to which is fixed an oil separator according to the embodiment. [Fig. 6] Figure 6 is a sectional view of the cylinder block and the oil decanter along a plane parallel to an axis of a cylinder passing through an axis of a fresh air inlet in the oil decanter according to embodiment.
[Fig. 7] La figure 7 est une vue de côté du carter cylindres et du décanteur d’huile selon le mode de réalisation. [Fig. 7] Figure 7 is a side view of the cylinder block and the oil separator according to the embodiment.
[Fig. 8] La figure 8 est une vue en coupe du carter cylindres et du décanteur d’huile selon un plan perpendiculaire aux axes des cylindres et traversant une chambre d’air du décanteur d’huile selon le mode de réalisation.[Fig. 8] Figure 8 is a sectional view of the cylinder block and the oil separator along a plane perpendicular to the axes of the cylinders and passing through an air chamber of the oil separator according to the embodiment.
[Fig. 9] La figure 9 est une vue en coupe partielle du carter cylindres et du décanteur d’huile selon un plan parallèle à un axe de cylindre et traversant une chambre d’air du décanteur d’huile selon la première variante du mode de réalisation de l’invention. [Fig. 9] FIG. 9 is a view in partial section of the cylinder block and of the oil separator along a plane parallel to a cylinder axis and passing through an air chamber of the oil separator according to the first variant of the embodiment of invention.
[Fig. 10] La figure 10 est une autre vue en coupe partielle du carter cylindres et du décanteur d’huile selon un plan parallèle à un axe de cylindre et traversant une chambre d’air du décanteur d’huile selon le mode de réalisation de l’invention. [Fig. 10] FIG. 10 is another view in partial section of the cylinder block and the oil separator along a plane parallel to a cylinder axis and passing through an air chamber of the oil separator according to the embodiment of the FIG. invention.
[Fig. 11] La figure 11 est une autre vue en coupe du carter cylindres et du décanteur d’huile selon un plan parallèle à un axe de cylindre et traversant une chambre d’air du décanteur d’huile selon le mode de réalisation de l’invention. [Fig. 11] FIG. 11 is another view in section of the cylinder block and of the oil separator along a plane parallel to a cylinder axis and passing through an air chamber of the oil separator according to the embodiment of the invention. .
Description détaillée detailed description
La figure 1 illustre schématiquement un véhicule 1 , par exemple un véhicule automobile. Le véhicule 1 comprend un moteur à combustion interne 2. Le moteur à combustion interne 2 est par exemple le seul moyen de traction et/ou de propulsion du véhicule 1 . Alternativement, un moyen électrique, par exemple un moyen comprenant un moteur électrique et un moyen d’accumulation d’énergie électrique, participe également à la traction et/ou à la propulsion du véhicule 1 , on parle alors de véhicule hybride. Le moteur à combustion interne 2 comprend un carter cylindres 3. Le carter cylindre(s) 3 comprend au moins un cylindre. Par exemple, comme illustré en particulier sur la figure 5, le carter cylindre 3 comprend trois cylindres 3C. Le moteur à combustion interne 2 comprend encore un décanteur d’huile 10. De préférence, le décanteur d’huile 10 est agencé sur le carter cylindres 3. Par « agencé », on entend que le décanteur d’huile est fixé sur le carter cylindre 3, voire que le décanteur d’huile est intégré au carter cylindre. Selon un mode de réalisation, le décanteur d’huile peut être une partie du carter cylindre. FIG. 1 schematically illustrates a vehicle 1, for example a motor vehicle. The vehicle 1 comprises an internal combustion engine 2. The internal combustion engine 2 is for example the only means of traction and / or propulsion of the vehicle 1. Alternatively, an electric means, for example a means comprising an electric motor and an electric energy storage means, also participates in the traction and / or the propulsion of the vehicle 1, one then speaks of a hybrid vehicle. The internal combustion engine 2 comprises a cylinder block 3. The cylinder block (s) 3 comprises at least one cylinder. For example, as illustrated in particular in FIG. 5, the cylinder block 3 comprises three cylinders 3C. The internal combustion engine 2 further comprises an oil separator 10. Preferably, the oil separator 10 is arranged on the cylinder block 3. The term “arranged” is understood to mean that the oil separator is fixed to the crankcase. cylinder 3, or even that the oil separator is integrated into the cylinder block. According to one embodiment, the oil separator can be part of the cylinder block.
Comme illustré en particulier sur les figures 2, 3 et 4, le moteur à combustion interne 2 comprend une admission 5. L’admission 5 comprend un filtre à air 7 et/ou un turbocompresseur 8. Le moteur 2 comprend encore un tuyau 6 de ventilation d’air. As illustrated in particular in Figures 2, 3 and 4, the internal combustion engine 2 comprises an intake 5. The intake 5 comprises an air filter 7 and / or a turbocharger 8. The engine 2 further comprises a pipe 6 of air ventilation.
Comme illustré en particulier sur les figures 2, 3, 4 et 6, le carter cylindres 3 comprend une chambre de bielles 4. De préférence, une nappe d’huile H demeure au fond, selon une direction verticale, de la chambre de bielles 4. As illustrated in particular in Figures 2, 3, 4 and 6, the cylinder block 3 comprises a connecting rod chamber 4. Preferably, an oil layer H remains at the bottom, in a vertical direction, of the connecting rod chamber 4. .
Le carter du décanteur d’huile 10 comprend une chambre 20 indépendante de la décantation. La chambre 20 est destinée à recevoir de l’air frais F. De préférence, cet air frais F est prélevé en aval du filtre à air 7 et/ou en amont du turbocompresseur 8. L’air frais F arrive dans la chambre 20 via le tuyau 6. Pour ce faire, une entrée 21 est ménagée dans la chambre 20. Ainsi l’air frais F parvient au sein de la chambre 20 par l’entrée 21 . Une sortie 22 est ménagée dans la chambre 20 de sorte à déboucher dans le carter cylindres 3, comme illustré sur la figure 11 . La sortie 22 est destinée à évacuer l’air depuis la chambre d’air 20 et à envoyer cet air frais F au sein du carter cylindres 3. L’air frais F est envoyé de préférence au niveau de la chambre de bielles 4 de sorte à chasser les gaz blowby et/ou des vapeurs d’huile présents au sein du carter cylindres 3. De préférence, le tuyau 6 s’étend entre l’entrée 21 de la chambre 20 et un orifice de prélèvement 9 d’air frais. Avantageusement, l’orifice de prélèvement 9 est donc ménagé en aval du filtre à air 7. Ainsi l’air frais F prélevé est filtré, il est donc dépourvu de salissure et/ou poussière. Une tubulure 11 permet un retour d’huile RH de décantation en faisant communiquer le volume intérieur du décanteur 10 avec le volume d’un carter d’huile en traversant le carter cylindre. The casing of the oil decanter 10 comprises a chamber 20 independent of the settling. The chamber 20 is intended to receive fresh air F. Preferably, this fresh air F is taken downstream of the air filter 7 and / or upstream of the turbocharger 8. The fresh air F arrives in the chamber 20 via the pipe 6. To do this, an inlet 21 is made in the chamber 20. Thus the fresh air F reaches within the chamber 20 through the inlet 21. An outlet 22 is made in the chamber 20 so as to open into the cylinder block 3, as illustrated in FIG. 11. The outlet 22 is intended to evacuate the air from the air chamber 20 and to send this fresh air F within the cylinder block 3. The fresh air F is preferably sent to the level of the connecting rod chamber 4 so in expelling the blowby gases and / or oil vapors present within the cylinder block 3. Preferably, the pipe 6 extends between the inlet 21 of the chamber 20 and a sampling orifice 9 of fresh air. Advantageously, the sampling orifice 9 is therefore provided downstream of the air filter 7. Thus the fresh air F taken is filtered, it is therefore free of dirt and / or dust. A pipe 11 allows a return of settling oil RH by making the internal volume of the settling tank 10 communicate with the volume of an oil sump passing through the cylinder crankcase.
Comme illustré sur les figures 5, 6, 7, 9 et 10, le carter du décanteur d’huile 10 comprend un clapet anti-retour 30. Avantageusement, le clapet anti retour 30 est intégré au carter du décanteur d’huile 10 de manière à contrôler l’obturation de l’entrée 21. Ainsi, grâce à la présence de ce clapet anti retour, seul un flux s’évacuant de la chambre 20 par la sortie 22 est possible. As illustrated in FIGS. 5, 6, 7, 9 and 10, the casing of the oil separator 10 comprises a non-return valve 30. Advantageously, the non-return valve 30 is integrated into the casing of the oil separator 10 in such a manner. to control the blockage of the inlet 21. Thus, thanks to the presence of this non-return valve, only a flow discharging from the chamber 20 through the outlet 22 is possible.
Selon une première variante illustrée sur les figures 3 et 9, le décanteur 10 comprend une tubulure 11 de retour d’huile RH de décantation traversant la chambre 20. De préférence, la tubulure 11 traverse de manière étanche la chambre 20. Par exemple la sortie 22 est ménagée au-dessous de la tubulure 11 , comme illustré sur la figure 3. According to a first variant illustrated in FIGS. 3 and 9, the settling tank 10 comprises a pipe 11 for returning the settling oil RH through the chamber 20. Preferably, the pipe 11 passes through the chamber 20 in a sealed manner. For example the outlet. 22 is provided below the pipe 11, as illustrated in Figure 3.
Selon une deuxième variante illustrée sur la figure 4, la chambre d’air frais 20 est un conduit. Autrement dit le volume intérieur de la chambre est égal, ou sensiblement égal, au volume intérieur du conduit 25. Ainsi le conduit 25 s’étend entre l’entrée 21 et la sortie 22, par exemple de manière rectiligne. De préférence, le conduit 25 est agencé, par exemple horizontalement ou sensiblement horizontalement, dans une partie inférieure du décanteur. De préférence encore, le conduit 25 est agencé sous une jonction 12 entre la tubulure 11 de retour d’huile RH de décantation et le décanteur 10. Le conduit 25 peut ainsi être dans une chambre de décantation 13 du décanteur. En résumé, le tuyau 6 de ventilation a pour fonction d’amener de l’air frais F, de préférence filtré, dans le carter cylindres, notamment en partie inférieure de la chambre de bielles 4. Les gaz blowby crées par la combustion du mélange air-carburant et des vapeurs d’huile sont ainsi chassés et passent à travers le décanteur d’huile 10 en empruntant la tubulure d’entrée. Ainsi, le décanteur ou boîtier de décantation agencé à l’extérieur du moteur, plus particulièrement à l’extérieur du carter cylindres 3, reçoit les gaz blowby provenant du carter cylindres, en particulier de la chambre de bielles. According to a second variant illustrated in FIG. 4, the fresh air chamber 20 is a duct. In other words, the internal volume of the chamber is equal, or substantially equal, to the internal volume of the duct 25. Thus the duct 25 extends between the inlet 21 and the outlet 22, for example in a rectilinear manner. Preferably, the duct 25 is arranged, for example horizontally or substantially horizontally, in a lower part of the settling tank. More preferably, the pipe 25 is arranged under a junction 12 between the pipe 11 for the return of the settling oil RH and the settling tank 10. The pipe 25 can thus be in a settling chamber 13 of the settling tank. In summary, the function of the ventilation pipe 6 is to bring fresh air F, preferably filtered, into the cylinder block, in particular in the lower part of the connecting rod chamber 4. The blowby gases created by the combustion of the mixture air-fuel and oil vapors are thus expelled and pass through the oil separator 10 via the inlet pipe. Thus, the settling tank or settling box arranged outside the engine, more particularly outside the cylinder block 3, receives the blowby gases coming from the cylinder block, in particular from the connecting rod chamber.
Comme illustré en particulier sur les figures 2, 3 et 4, le moteur 2 comprend de préférence un premier canal 14 reliant par exemple le volume intérieur du décanteur, depuis une partie haute 15 du décanteur par exemple, à un répartiteur d’air 40. De préférence, le moteur 2 comprend encore un second canal 16 reliant par exemple le volume intérieur du décanteur, depuis une partie latérale 17 du décanteur par exemple, à l’admission 5, par exemple en amont du turbocompresseur 8. Ainsi, les gaz blowby BB piégés dans le décanteur d’huile du fait de la ventilation d’air frais F au sein du carter cylindres, peuvent s’échapper par le premier canal 14 et/ou par le second canal 16. Les gaz blowby BB sont alors amenés à rejoindre l’admission 5 et par conséquent à être injectés, par exemple au niveau d’une culasse 18, comme des gaz d’admission provenant du turbocompresseur 8 et/ou directement du filtre à air 7. Ainsi, un avantage de disposer l’air frais à côté de la décantation est de permettre un transfert de chaleur entre le blow by et l’air frais ce qui favorise la décantation des vapeurs d’huile. En effet, les gaz déshuilés bénéficient d’un refroidissement. As illustrated in particular in Figures 2, 3 and 4, the motor 2 preferably comprises a first channel 14 connecting for example the interior volume of the settling tank, from an upper part 15 of the settling tank for example, to an air distributor 40. Preferably, the engine 2 also comprises a second channel 16 connecting for example the internal volume of the settling tank, from a lateral part 17 of the settling tank for example, to the inlet 5, for example upstream of the turbocharger 8. Thus, the blowby gases BB trapped in the oil decanter due to the ventilation of fresh air F within the cylinder block, can escape through the first channel 14 and / or through the second channel 16. The blowby gases BB are then brought to join the intake 5 and therefore to be injected, for example at a cylinder head 18, as intake gases from the turbocharger 8 and / or directly from the air filter 7. Thus, an advantage of having the fresh air next to the settling is to allow a t heat transfer between the blow-by and the fresh air which promotes the settling of oil vapors. In fact, the deoiled gases benefit from cooling.
Autrement dit, le clapet anti-retour du circuit de ventilation de carter cylindres est intégré au décanteur d’huile en créant une chambre d’air à l’intérieur de celui-ci. La chambre d’air communique avec le carter cylindres, en particulier au niveau de la chambre de bielles, par un piquage étanche au niveau de l’interface entre la sortie de la chambre d’air et le carter cylindres, par exemple en utilisant un joint. In other words, the non-return valve of the cylinder block ventilation circuit is integrated into the oil decanter by creating an air chamber inside it. The air chamber communicates with the cylinder block, in particular at the level of the connecting rod chamber, by a tapping sealed at the interface between the outlet of the air chamber and the cylinder block, for example by using a gasket.
A noter que le tuyau 6 permet d’assurer une seconde fonction, à savoir maintenir l’intérieur du carter cylindres toujours en dépression grâce au clapet anti-retour. En effet, comme évoqué précédemment, le clapet anti retour empêche le reflux des gaz blowby vers l’admission d’air par le tuyau 6, en particulier en cas de surpression. Pour rappel, le captage de l’air frais F se fait en aval du filtre à air 7 et en amont du compresseur 8 de sorte à arriver dans le décanteur d’huile 10. Comme évoqué précédemment, aussi bien dans le mode de réalisation que dans la première et la deuxième variante, le volume du décanteur communique dans le carter cylindres 3. Note that the pipe 6 performs a second function, namely to keep the interior of the cylinder block always at vacuum thanks to the non-return valve. In fact, as mentioned above, the non-return valve prevents blowby gases from flowing back to the air inlet through pipe 6, in particular in the event of overpressure. As a reminder, the collection of the fresh air F takes place downstream of the air filter 7 and upstream of the compressor 8 so as to arrive in the oil decanter 10. As mentioned previously, both in the embodiment and in the first and the second variant, the volume of the settling tank communicates in the cylinder block 3.
Ainsi, le clapet anti-retour est placé sur le parcours du tuyau 6, à proximité du carter cylindres 3 sans toutefois être fixé sur le carter cylindres 3. Il en résulte une simplification du carter cylindre puisqu’il ne nécessite pas d’élément de fixation spécifique pour le clapet anti-retour, telle qu’une vis et/ou un taraudage et/ou un alésage de réception. Ainsi, étant donnée la suppression de cet élément de fixation, le coût des fonctions de ventilation et de décantation des gaz blowby est abaissé. En outre, le parcours du tuyau 6 est simplifié avec une réduction du nombre de pièces formant le parcours, notamment en présentant moins de courbure, en particulier moins de courbure à faible rayon. A noter que seul le décanteur d’huile est modifié pour simplifier le tuyau de ventilation. Enfin, le tuyau 6 est davantage accessible pour intervenir, le montage-démontage du tuyau étant facilité, aussi bien en usine à l’assemblage du moteur qu’en après- vente. Thus, the non-return valve is placed on the path of the pipe 6, near the cylinder block 3 without however being fixed to the cylinder block 3. This results in a simplification of the cylinder block since it does not require any element of the cylinder block. specific fixing for the non-return valve, such as a screw and / or an internal thread and / or a receiving bore. Thus, given the elimination of this fastener, the cost of the functions of ventilation and settling of the blowby gases is lowered. In addition, the path of the pipe 6 is simplified with a reduction in the number of parts forming the path, in particular by having less curvature, in particular less curvature at a small radius. Note that only the oil decanter is modified to simplify the ventilation pipe. Finally, the pipe 6 is more accessible for intervention, the assembly-disassembly of the pipe being facilitated, both in the factory for the assembly of the engine and after-sales.
Dans la première variante illustrée en particulier sur les figures 3 et 9, la tubulure 11 et par conséquent le circuit de gaz blowby BB refoulés du fait de la ventilation d’air frais F, traverse la chambre d’air 20. Il en résulte un refroidissement de l’huile au niveau du passage de la chambre 20 remplie d’air frais. En effet, l’air frais F est a priori à une température inférieure à celle de l’huile. In the first variant illustrated in particular in Figures 3 and 9, the pipe 11 and therefore the blowby gas circuit BB discharged due to the ventilation of fresh air F, passes through the air chamber 20. This results in a cooling of the oil at the level of the passage of the filled chamber 20 fresh air. In fact, the fresh air F is a priori at a temperature lower than that of the oil.
En remarque, la solution selon l’invention atteint donc l’objectif recherché de simplifier un tuyau de ventilation des gaz blowby dans un carter cylindres et d’intégrer aisément un clapet anti-retour, et présente les avantages suivants : As a note, the solution according to the invention therefore achieves the desired objective of simplifying a blowby gas ventilation pipe in a cylinder block and easily integrating a non-return valve, and has the following advantages:
- le coût est faible, de préférence seul le décanteur est modifié ; - the cost is low, preferably only the settling tank is modified;
- elle peut être appliquée sur tout moteur à combustion interne utilisant un décanteur d’huile. - it can be applied to any internal combustion engine using an oil separator.

Claims

REVENDICATIONS
1. Décanteur d’huile (10) pour moteur à combustion interne (2), notamment décanteur d’huile (10) destiné à être agencé sur un carter cylindres (3) d’un tel moteur à combustion interne (2), caractérisé en ce que le décanteur d’huile (10) comprend : une chambre (20), une entrée (21 ) ménagée dans la chambre (20) destinée à admettre de l’air frais (F), notamment de l’air frais (F) prélevé en aval d’un filtre à air (7) et/ou en amont d’un turbocompresseur (8), et une sortie (22) ménagée dans la chambre (20) destinée à envoyer de l’air frais (F) au sein d’un carter cylindres (3), notamment en partie inférieure d’une chambre de bielles (4), de sorte à chasser des gaz blow-by et/ou des vapeurs d’huile (BB) d’un tel carter cylindres (3). 1. Oil decanter (10) for an internal combustion engine (2), in particular an oil decanter (10) intended to be arranged on a cylinder block (3) of such an internal combustion engine (2), characterized in that the oil decanter (10) comprises: a chamber (20), an inlet (21) made in the chamber (20) intended to admit fresh air (F), in particular fresh air ( F) taken downstream of an air filter (7) and / or upstream of a turbocharger (8), and an outlet (22) provided in the chamber (20) intended to send fresh air (F) ) within a cylinder block (3), in particular in the lower part of a connecting rod chamber (4), so as to expel blow-by gases and / or oil vapors (BB) from such cylinder block (3).
2. Décanteur d’huile (10) selon la revendication précédente, caractérisé en ce que la chambre (20) d’air frais jouxte une chambre de décantation du décanteur d’huile (10). 2. Oil decanter (10) according to the preceding claim, characterized in that the fresh air chamber (20) adjoins a settling chamber of the oil decanter (10).
3. Décanteur d’huile (10) selon l’une des revendications précédentes, caractérisé en ce que le décanteur d’huile (10) comprend un clapet anti- retour (30) agencé au niveau de l’entrée (21 ) de sorte à ne permettre à un flux de s’évacuer de la chambre (20) que par la sortie (22). 3. Oil decanter (10) according to one of the preceding claims, characterized in that the oil decanter (10) comprises a non-return valve (30) arranged at the inlet (21) so allowing a flow to escape from the chamber (20) only through the outlet (22).
4. Décanteur d’huile (10) selon l’une des revendications précédentes, caractérisé en ce que le décanteur (10) comprend une tubulure (11 ) de retour d’huile traversant de manière étanche la chambre (20). 4. Oil decanter (10) according to one of the preceding claims, characterized in that the decanter (10) comprises an oil return pipe (11) sealingly passing through the chamber (20).
5. Décanteur d’huile (10) selon l’une des revendications précédentes, caractérisé en ce que la chambre (20) est un conduit (25) s’étendant entre l’entrée (21) et la sortie (22). 5. Oil decanter (10) according to one of the preceding claims, characterized in that the chamber (20) is a conduit (25) extending between the inlet (21) and the outlet (22).
6. Décanteur d’huile (10) selon la revendication précédente, caractérisée en ce que le conduit (25) traverse la chambre de décantation du décanteur d’huile. 6. Oil decanter (10) according to the preceding claim, characterized in that the conduit (25) passes through the settling chamber of the oil decanter.
7. Moteur à combustion interne (2) comprenant un carter cylindres (3), notamment moteur à combustion interne (2) comprenant une admission (5) comprenant un filtre à air (7) et/ou un turbocompresseur (8), caractérisé en ce qu’il comprend un décanteur d’huile (10) selon l’une des revendications précédentes et un tuyau (6) de ventilation d’air s’étendant entre l’entrée (21) de la chambre (20) et un orifice de prélèvement (9) d’air frais, notamment un orifice de prélèvement (9) ménagé en aval du filtre à air (7) et/ou en amont du turbocompresseur (8). 7. Internal combustion engine (2) comprising a cylinder block (3), in particular internal combustion engine (2) comprising a intake (5) comprising an air filter (7) and / or a turbocharger (8), characterized in that it comprises an oil separator (10) according to one of the preceding claims and a pipe (6) of air ventilation extending between the inlet (21) of the chamber (20) and a sampling orifice (9) of fresh air, in particular a sampling orifice (9) made downstream of the air filter (7 ) and / or upstream of the turbocharger (8).
8. Véhicule (1 ), notamment véhicule automobile, caractérisé en ce qu’il comprend un moteur à combustion interne (2) selon la revendication précédente et/ou un décanteur d’huile (10) selon l’une des revendications 1 à 6. 8. Vehicle (1), in particular motor vehicle, characterized in that it comprises an internal combustion engine (2) according to the preceding claim and / or an oil separator (10) according to one of claims 1 to 6 .
EP20801275.7A 2019-12-02 2020-11-10 Oil decanter comprising a fresh air chamber Active EP4069951B1 (en)

Applications Claiming Priority (2)

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FR1913603A FR3103856B1 (en) 2019-12-02 2019-12-02 Oil decanter including a fresh air chamber.
PCT/EP2020/081559 WO2021110369A1 (en) 2019-12-02 2020-11-10 Oil decanter comprising a fresh air chamber

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KR (1) KR20220104732A (en)
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JPH0723531Y2 (en) * 1988-10-18 1995-05-31 日産自動車株式会社 Blow-by gas recirculation system for engines
JPH0893434A (en) * 1994-09-20 1996-04-09 Nissan Motor Co Ltd Blow-by gas ventilating device of internal combustion engine
JP3725204B2 (en) * 1995-06-08 2005-12-07 オリヱント化学工業株式会社 Novel triphenylmethane salt forming dye and ink composition
JP3189649B2 (en) * 1995-11-14 2001-07-16 日産自動車株式会社 Engine blow-by gas ventilation system
DE102005059668A1 (en) * 2005-12-12 2007-06-14 Mahle International Gmbh Internal combustion engine e.g. in motor vehicle, has fresh air installation and de-gasification installation whereby de-gasification installation has oil separator for removing of oil from blow-by gases
FR2928683A1 (en) * 2008-03-11 2009-09-18 Peugeot Citroen Automobiles Sa Blow-by gas e.g. carbon dioxide gas, diluting device for e.g. naturally-aspirated engine, of motor vehicle, has gas circulation branch arranged between separator and inlet air intake conduit and in upstream of inlet control valve
JP5202235B2 (en) * 2008-11-04 2013-06-05 株式会社マーレ フィルターシステムズ Engine ventilation system
DE102009053808B4 (en) * 2009-11-18 2014-09-11 Bundesanstalt für Materialforschung und -Prüfung (BAM) Security label for marking goods
JP5847445B2 (en) * 2011-06-08 2016-01-20 株式会社マーレ フィルターシステムズ Oil separator for internal combustion engine
US8408190B2 (en) * 2011-07-06 2013-04-02 GM Global Technology Operations LLC Air-oil separator for extracting oil from engine blowby gas
JP5664628B2 (en) * 2012-10-16 2015-02-04 トヨタ自動車株式会社 Blow-by gas ventilation system for an internal combustion engine with a supercharger
JP6502596B2 (en) * 2015-04-06 2019-04-17 本田技研工業株式会社 Internal combustion engine

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EP4069951B1 (en) 2024-04-24
KR20220104732A (en) 2022-07-26
CN114929996A (en) 2022-08-19
FR3103856A1 (en) 2021-06-04
FR3103856B1 (en) 2022-12-02

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