EP3244034B1 - Internal combustion engine comprising a coolant pump - Google Patents

Internal combustion engine comprising a coolant pump Download PDF

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Publication number
EP3244034B1
EP3244034B1 EP17158620.9A EP17158620A EP3244034B1 EP 3244034 B1 EP3244034 B1 EP 3244034B1 EP 17158620 A EP17158620 A EP 17158620A EP 3244034 B1 EP3244034 B1 EP 3244034B1
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EP
European Patent Office
Prior art keywords
engine
pump
coupling
housing
recess
Prior art date
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Active
Application number
EP17158620.9A
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German (de)
French (fr)
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EP3244034A1 (en
Inventor
Jean-Pierre Millon
Jean-Louis Gratian
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Renault SAS
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Renault SAS
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Publication date
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Publication of EP3244034A1 publication Critical patent/EP3244034A1/en
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Publication of EP3244034B1 publication Critical patent/EP3244034B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
    • F01P5/12—Pump-driving arrangements
    • 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
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/02—Cylinders; Cylinder heads  having cooling means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/02—Arrangements for cooling cylinders or cylinder heads
    • F01P2003/027—Cooling cylinders and cylinder heads in parallel

Definitions

  • the present invention relates to a heat engine comprising a heat transfer fluid pump.
  • the invention also relates to a vehicle including a motor vehicle comprising such a heat engine.
  • a heat transfer fluid pump circulates this fluid in a cooling circuit to regulate the engine temperature.
  • Such a pump is conventionally arranged in a distribution facade also called accessory facade of the engine.
  • This pump includes a pulley, which drives a blade, or turbine, adapted to circulate the fluid in the cooling circuit.
  • the pulley of the pump is driven by a drive belt, which generally drives other vehicle components such as the alternator, the power steering pump, etc.
  • a major disadvantage of such an arrangement of the pump at the dispensing facade is related to the fact that in certain configurations of the engine architecture, it is necessary to add another length of belt, pulleys of referrals and / or tensioning rollers in order to ensure proper operation of the pump. Such additions generate, in addition to the complexity of the path of the belt, an additional cost that can be important.
  • this arrangement of the pump induces a significant increase in the size of the engine due to the implementation of a cooling circuit of great complexity for conveying the coolant in the various parts of the engine to be cooled. .
  • the present invention aims to overcome these disadvantages related to the state of the art.
  • the invention relates to a heat engine according to claim 1.
  • the invention also relates to a vehicle including a motor vehicle comprising such a heat engine.
  • X is the longitudinal direction of the front-rear of the vehicle directed towards the rear
  • Y is the right transverse direction.
  • Z is the vertical direction directed towards the top.
  • front, rear, right, left, horizontal, vertical, upper, lower are defined with respect to the direction of movement of the vehicle.
  • the figure 1 is a schematic representation of an embodiment of a heat engine 1 comprising a cylinder casing 2a provided with a plurality of cylinders 3, otherwise called stations, which can be arranged in line.
  • This cylinder casing 2a of the engine 1 may include nonlimiting and non-exhaustive four cylinders 3 arranged in line.
  • This cylinder head cover 2b comprises a lower face which is intended to be fixed on an upper face of the cylinder casing 2a, which is disposed below this cylinder head housing 2b.
  • This breech housing 2b includes the distribution mainly composed of valves and camshafts. More specifically, in this cylinder head housing 2b are provided supply or intake ducts and exhaust ducts which are respectively intended for the flow of an air mixture and admitted gas to the cylinders of the engine 1, and the flow of flue gas escaping out of the cylinders 3. These ducts are controlled by valves, and these are actuated by at least one camshaft.
  • This engine 1 can be a static engine, a motor of an electric generator. It can also be a motor 1 which is implemented in a vehicle such as a land vehicle including a motor vehicle, or a marine or air vehicle.
  • the engine 1 conventionally comprises a crankshaft 6 which rotates about a horizontal axis of the engine 1, pistons which slide in cylinders 3 in reciprocating motions, and rods whose upper ends are connected to the pistons and whose lower ends are connected to this crankshaft 6 via eccentric connections.
  • the reciprocating movement of the pistons initiated by the combustion of a mixture of air and fuel in the cylinders 3, thus makes it possible to rotate the crankshaft 6.
  • crankshaft 6 of the engine 1 is guided by rotation by bearings which are arranged between each cylinder 3 of the engine 1 and on either side of the cylinder casing 2a typically at the respective outlets 7a, 7b of the crankshaft 6 towards a coupling face 4a and towards a frontage of 4b distribution of the engine 1 on the other hand, which outlets 7a, 7b being visible on the Figures 2 and 3 .
  • the coupling face 4a is located at a first end of the engine 1.
  • this coupling face 4a is located at the cylinder casing 2a, it can however in other variants be located at the level of the casing 2a.
  • the cylinder head 2b. It essentially comprises a transmission assembly comprising a coupling case 8 and a gearbox 9, the coupling case 8 connecting the engine 1 and thus the crankshaft 6 to said gearbox 9.
  • This coupling case 8 comprises in a manner known in itself, a flywheel 10 to be fixed on the crankshaft 6 of the engine 1 and a clutch 11 may comprise a clutch mechanism and at least one friction disc.
  • a casing 12 covering the coupling housing 8 and the gearbox 9 is fixed to the coupling face 4a in particular at a connecting surface 14 having a substantially circular shape and which is visible on the figures 2 and 11 .
  • This engine 1 is commonly equipped with a number of peripherals and accessories, among which there may be mentioned an alternator and an air conditioning compressor. These accessories are driven by the operation of the engine 1, via an accessory belt generally connected to a pulley located at the end of a crankshaft 6 of the engine 1, commonly called “crankshaft pulley” and which is arranged at the level of the engine. of the distribution facade 4b.
  • This distribution facade 4b also called accessory facade, is located at a second end of the engine 1 being substantially opposite to the coupling face 4a. It essentially comprises pulleys carried by the ends of the crankshaft 6 and a camshaft (or shafts), and the timing belt which transmits to the camshaft the rotation of the crankshaft 6.
  • the distribution facade 4b may also include other pulleys on which the timing belt acts. It also has rollers by which the tension and the orientation of the strands of the timing belt are adjusted.
  • the engine 1 comprises a heat transfer fluid pump 5 for circulating this fluid in a cooling circuit 15 of the engine 1.
  • This pump 5 comprises a pump body 16, a fluid inlet duct 17a and a outlet duct 17b forming a pump volute.
  • This pump 5 is intended to circulate via the outlet conduit 17b said coolant or cooling fluid in the cooling circuit 15 of the engine 1.
  • this circuit 15 comprises first and second fluid conduits 18a, 18b otherwise called core or fluid chamber.
  • Each fluid conduit 18a, 18b is a hollow space or a recess consisting of circulation channels which is defined in the cylinder block 2a or the cylinder head 2b of the engine 1 and in which is intended to circulate this cooling fluid, here some water.
  • the fluid inlet 19a of this pump 5 is preferably embedded in the coupling face 4a thereby to have the fluid inlet duct 17a in the coupling face 4a.
  • the inlet duct 17a comprises a casing which is mechanically connected to a sealing surface 28 defined at the level of the facade. coupling 4a and in particular an outer skin 29 of this facade 4a.
  • This housing may include a convergent.
  • the pump body 16 is traversed on either side by a pump shaft 20.
  • the shaft 20 is immobilized radially and axially by a ball bearing.
  • a ball bearing One could consider a plurality of bearings or a double row ball bearing to ensure the stability and maintenance of the shaft 20 in the pump body 16.
  • One end of the shaft 20 supports a blade 21 , or a turbine, adapted to the circulation of the fluid in the cooling circuit 15, the other end comprises a coupling zone 22.
  • the blade 21 is secured to the axis for example by a key device well known to those skilled in the art.
  • a key device well known to those skilled in the art.
  • the water / air seal between the axis 20 and the body 16, intended to prevent the cooling fluid from entering the inside of the pump 5 and damaging the bearing, is provided by a dynamic sealing element 23a for a first variant of the pump 5 illustrated on the figure 9 or two dynamic sealing elements 23a, 23b for a second variant visible on the figure 10 .
  • the dynamic sealing element 23a, 23b may be a lip seal and more particularly an O-ring guaranteeing excellent sealing.
  • the pump body 16 also comprises an attachment zone 24 provided with at least one O-ring 25 intended to ensure a sealed mechanical connection of the pump 5 in a housing 26 defined in the coupling face 4a of the engine 1, in particular with a wall of this housing 26.
  • the pump body 16 also comprises at least one air passage 27 for evacuating by evaporation, the cooling fluid that could penetrate inside the pump 5 despite the presence of the sealing elements 23a, 23b.
  • the housing 26 is included in a portion of the coupling face 4a which is defined at the cylinder housing 2a.
  • a housing 26 has a shape complementary to that of the pump 5.
  • the housing 26 comprises an opening 30 which is defined at a zone 31 of the outer skin 29 of the coupling face 4a. According to the invention, this opening 30 is arranged facing the flywheel 10 of the coupling housing 8.
  • the housing 26 and therefore this opening 30 are defined between the connecting surface 14 and an orifice forming the outlet 7a which is formed in the coupling face 4a and which is crossed by an end of the crankshaft 6 provided to be connected to the flywheel 10.
  • this housing 26 of the pump 5 is located at a height h1 which extends from the bottom of the oil sump 32 of the engine 1 to the pump 5 which is less than a height h2 between the bottom of the oil sump. oil 32 and the cooling circuit 15 of the engine 1 and in particular the first conduit 18a.
  • the pump 5 is located in a lower part of the engine 1 and preferably at a height h1 which positions it at a level which is located below the level of the first conduit 18a relative to the height h2.
  • the pump 5 is then constantly in the cooling fluid and this even during filling or refilling after-sales phases as well as in degassing phases of the cooling circuit 15.
  • Such a position of the pump 5 makes it possible to avoid failures of the "joint grout" type, in particular during the unfolding of these phases, which may for example result from the presence of a gas bubble and / or the absence of cooling fluid in the circuit 15.
  • the blade 21 is oriented towards the opening 30 or towards the outside of the coupling face 4a.
  • the coupling zone 22 of the pump 5 is adapted to cooperate directly or indirectly with a drive shaft 33 of the motor 1, said shaft 33 being in kinematic relation with the crankshaft 6. Under these conditions, the pump 5 is therefore arranged in the engine 1 so as to be in kinematic relationship with the crankshaft 6 in particular via said drive shaft 33.
  • the drive shaft 33 is preferably a balancing shaft 33 of the engine 1.
  • the engine 1 comprises indeed two balancing shafts 33 mounted in rotation about balancing axes parallel and distinct from the motor axis 1. These balancing shafts 33, one of which is visible on the figure 6 , are arranged in tunnels 34 defined in the engine 1. The ends of these tunnels 34 are visible on the Figures 2 and 3 relating respectively to the clutch facings 4a and 4b distribution of the engine 1
  • the rotational drive members are connected for each balance shaft 33 at a first end thereof having a drive wheel 35 such as a pulley.
  • the body of each of these shafts 33 comprises rolling members 36 selected from balls, needles and rollers.
  • One of the two balance shafts 33 constitutes a drive shaft 33 of the pump shaft 20 and comprises for this purpose in a second end a coupling member for providing a kinematic connection with the coupling zone 22 of the pump. 5.
  • the coupling zone 22 is adapted to be engaged with the coupling member of the drive shaft 33.
  • the housing 26 in which the pump 5 is arranged comprises a bottom which is open because having an orifice, and which opens into the tunnel 34 in which is arranged the balancing shaft 33 for the establishment of a coupling link between the coupling zone 22 and the coupling member of this shaft 33
  • this dwelling 26 can therefore be made by machining at the same time or at least with good accuracy with respect to this tunnel 34.
  • the coupling connection between the pump 5 and the balancing shaft is simplified because it does not require the use of a complex coupling joint.
  • the coupling connection can be made without a coupling joint but only from a screw mechanism of the pump shaft 20 on the balancing shaft 33.
  • the engine 1 also comprises a housing 13 for input and output of the coolant circulating in the cooling circuit 15.
  • This housing 13 is preferably arranged in the coupling face 4a.
  • the housing 13 is positioned between the breech housing 2b and the coupling housing 8, in particular between the breech housing 2b and the connection support 14.
  • the housing 13 is connected to an inlet 19a and two outputs 19b, 19c of the cooling circuit 15.
  • this housing 13 by centralizing all the inputs and outputs 19a, 19b, 19c of the cooling circuit 15 can allow an implementation of simplified control of multiple circulations of the fluid in the cooling circuit 15.
  • the inputs and outputs 19a, 19b, 19c of this circuit are embedded in the coupling face 4a.
  • the fluid enters this input of the circuit to be routed to the pump 5 to be then circulated in the first and second conduits 18a, 18b of fluid in the direction of circulation represented by the arrows present on the figures 1 , 4 and 5 .
  • each opening / closing element 37 may comprise a flap 38 and a return element 39 such as a spring made of a shape memory material.
  • the pump 5 delivers a fluid in a cooling circuit 15 which is simplified in terms of packaging allowing simple or more complex water circulations of all types, thus making it possible to implement modes of operation of the cooling circuit 15 for example in "split cooling” or in single or multiple loop.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Description

La présente invention concerne un moteur thermique comprenant une pompe à fluide caloporteur.The present invention relates to a heat engine comprising a heat transfer fluid pump.

L'invention concerne également un véhicule notamment un véhicule automobile comportant un tel moteur thermique.The invention also relates to a vehicle including a motor vehicle comprising such a heat engine.

Dans un moteur de véhicule, une pompe à fluide caloporteur permet de faire circuler ce fluide dans un circuit de refroidissement afin de réguler la température du moteur.In a vehicle engine, a heat transfer fluid pump circulates this fluid in a cooling circuit to regulate the engine temperature.

Une telle pompe est classiquement agencée dans une façade de distribution également appelée façade accessoire du moteur. Cette pompe comprend notamment une poulie, qui entraîne une aube, ou turbine, adaptée pour faire circuler le fluide dans le circuit de refroidissement. La poulie de la pompe est entraînée par une courroie de transmission, qui entraîne en règle générale d'autres éléments du véhicule tels que l'alternateur, la pompe de direction assistée, etc...Such a pump is conventionally arranged in a distribution facade also called accessory facade of the engine. This pump includes a pulley, which drives a blade, or turbine, adapted to circulate the fluid in the cooling circuit. The pulley of the pump is driven by a drive belt, which generally drives other vehicle components such as the alternator, the power steering pump, etc.

Cependant, un inconvénient majeur d'un tel agencement de la pompe au niveau de la façade de distribution est lié au fait que dans certaines configurations de l'architecture du moteur, il est nécessaire d'ajouter encore une longueur de courroie, des poulies de renvois et/ou des galets tendeur afin de pouvoir assurer un fonctionnement convenable de la pompe. De tels ajouts génèrent, en plus de la complexité du chemin de la courroie, un coût additionnel qui peut s'avérer important.However, a major disadvantage of such an arrangement of the pump at the dispensing facade is related to the fact that in certain configurations of the engine architecture, it is necessary to add another length of belt, pulleys of referrals and / or tensioning rollers in order to ensure proper operation of the pump. Such additions generate, in addition to the complexity of the path of the belt, an additional cost that can be important.

Les documents DE102014207071-A1 , US2014/060465-A1 et DE102005026786-A1 décrivent une telle pompe agencée dans un logement d'un carter-cylindres à proximité d'un carter d'accouplement.The documents DE102014207071-A1 , US2014 / 060465-A1 and DE102005026786-A1 describe such a pump arranged in a housing of a crankcase near a coupling housing.

De plus, cet agencement de la pompe induit une augmentation non négligeable de l'encombrement du moteur du fait de la mise en oeuvre d'un circuit de refroidissement d'une grande complexité pour acheminer le fluide caloporteur dans les différentes parties du moteur à refroidir.In addition, this arrangement of the pump induces a significant increase in the size of the engine due to the implementation of a cooling circuit of great complexity for conveying the coolant in the various parts of the engine to be cooled. .

La présente invention vise à pallier ces inconvénients liés à l'état de la technique.The present invention aims to overcome these disadvantages related to the state of the art.

Dans ce dessein, l'invention concerne un moteur thermique selon la revendication 1.For this purpose, the invention relates to a heat engine according to claim 1.

Dans d'autres modes de réalisation :

  • le logement est compris dans la façade d'accouplement d'un carter de cylindres du moteur ;
  • le logement comprend un fond débouchant dans un tunnel prévu dans le moteur pour recevoir ledit arbre d'entraînement ;
  • le logement comprend une ouverture définie dans une peau externe de la façade d'accouplement ;
  • un logement susceptible de recevoir la pompe est défini à une hauteur qui est inférieure à une hauteur du circuit de refroidissement ;
  • la pompe comprend une zone de couplage apte à être en prise avec un organe de couplage de l'arbre d'entraînement ;
  • le moteur comprend un boîtier d'entrée et de sortie du fluide caloporteur relié à ladite pompe et au circuit de refroidissement, agencé au niveau de la façade d'accouplement ;
  • la pompe comprend au moins un joint d'étanchéité dynamique, et
  • la pompe est en relation cinématique avec un vilebrequin du moteur notamment par l'intermédiaire dudit arbre d'entraînement.
In other embodiments:
  • the housing is included in the coupling face of a cylinder block of the engine;
  • the housing comprises a bottom opening into a tunnel provided in the motor for receiving said drive shaft;
  • the housing comprises an opening defined in an outer skin of the coupling facade;
  • a housing capable of receiving the pump is defined at a height which is less than a height of the cooling circuit;
  • the pump comprises a coupling zone adapted to be engaged with a coupling member of the drive shaft;
  • the engine comprises an inlet and outlet housing of the heat transfer fluid connected to said pump and to the cooling circuit, arranged at the coupling face;
  • the pump comprises at least one dynamic seal, and
  • the pump is in kinematic relationship with a crankshaft of the engine including via said drive shaft.

L'invention concerne également un véhicule notamment un véhicule automobile comprenant un tel moteur thermique.The invention also relates to a vehicle including a motor vehicle comprising such a heat engine.

D'autres avantages et caractéristiques de l'invention apparaîtront mieux à la lecture de la description d'un mode de réalisation préféré qui va suivre, en référence aux figures, réalisé à titre d'exemple indicatif et non limitatif :

  • la figure 1 représente une vue schématique d'un moteur thermique comprenant une pompe à fluide caloporteur selon un mode de réalisation de l'invention ;
  • la figure 2 représente une vue d'une façade d'accouplement du moteur notamment située au niveau d'un carter de cylindres du moteur selon le mode de réalisation de l'invention ;
  • la figure 3 représente une vue d'une façade de distribution du moteur notamment située au niveau du carter de cylindres du moteur selon le mode de réalisation de l'invention ;
  • les figures 4 et 5 représentent des vues relatives à un circuit de refroidissement du moteur selon le mode de réalisation de l'invention ;
  • la figure 6 représente une vue en perspective d'un arbre d'entraînement tel qu'un arbre d'équilibrage, en liaison cinématique par couplage avec une pompe à fluide caloporteur du moteur selon le mode de réalisation de l'invention ;
  • les figures 7 et 8 représentent des vues différentes de la pompe selon un mode de réalisation de l'invention ;
  • la figure 9 est une vue en coupe longitudinale selon IX-IX d'une variante de la pompe illustrée sur la figure 7 ;
  • la figure 10 est une vue en coupe longitudinale selon X-X d'une autre variante de la pompe illustrée sur la figure 7 ;
  • la figure 11 est une vue de la façade d'accouplement comprenant un boîtier d'entrée et de sortie de fluide circulant dans le circuit de refroidissement du moteur selon le mode de réalisation de l'invention, et
  • la figure 12 est une vue d'une sortie d'un premier ou d'un deuxième conduit de fluide du circuit de refroidissement pourvue d'un élément d'ouverture/fermeture selon le mode de réalisation de l'invention.
Other advantages and features of the invention will appear better on reading the description of a preferred embodiment which will follow, with reference to the figures, given as an indicative and nonlimiting example:
  • the figure 1 is a schematic view of a heat engine comprising a heat transfer fluid pump according to one embodiment of the invention;
  • the figure 2 represents a view of a coupling face of the engine, in particular located at a crankcase of the engine according to the embodiment of the invention;
  • the figure 3 represents a view of a motor distribution facade notably located at the cylinder block of the engine according to the embodiment of the invention;
  • the Figures 4 and 5 represent views relating to an engine cooling circuit according to the embodiment of the invention;
  • the figure 6 represents a perspective view of a drive shaft such as a balancing shaft, in kinematic connection by coupling with a heat transfer fluid pump of the engine according to the embodiment of the invention;
  • the Figures 7 and 8 represent different views of the pump according to one embodiment of the invention;
  • the figure 9 is a longitudinal sectional view along IX-IX of a variant of the pump illustrated in FIG. figure 7 ;
  • the figure 10 is a longitudinal sectional view along XX of another variant of the pump illustrated on the figure 7 ;
  • the figure 11 is a view of the coupling face including a fluid inlet and outlet housing circulating in the engine cooling circuit according to the embodiment of the invention, and
  • the figure 12 is a view of an outlet of a first or a second fluid conduit of the cooling circuit provided with an opening / closing element according to the embodiment of the invention.

La description est faite en référence à un trièdre X, Y, Z, associé classiquement à un véhicule notamment à un véhicule automobile, dans lequel X est la direction longitudinale avant-arrière du véhicule dirigée vers l'arrière, Y est la direction transversale droite-gauche au véhicule, qui est horizontale et perpendiculaire à X, dirigée vers la droite, et Z est la direction verticale dirigée vers le dessus. Par ailleurs, les termes « avant, arrière, droit, gauche, horizontal, vertical, supérieur, inférieur » sont définis par rapport au sens de déplacement du véhicule.The description is made with reference to a trihedron X, Y, Z, conventionally associated with a vehicle, in particular with a motor vehicle, in which X is the longitudinal direction of the front-rear of the vehicle directed towards the rear, Y is the right transverse direction. left to the vehicle, which is horizontal and perpendicular to X, directed to the right, and Z is the vertical direction directed towards the top. Furthermore, the terms "front, rear, right, left, horizontal, vertical, upper, lower" are defined with respect to the direction of movement of the vehicle.

La figure 1 est une représentation schématique d'un mode de réalisation d'un moteur thermique 1 comprenant un carter de cylindres 2a pourvu d'une pluralité de cylindres 3, autrement appelés postes, pouvant être rangés en ligne. Ce carter de cylindres 2a du moteur 1 peut comprendre de manière non limitative et non exhaustive quatre cylindres 3 rangés en ligne. Au-dessus du carter de cylindres 2a, suivant un axe sensiblement parallèle à l'axe vertical des cylindres 3, vient se fixer un second carter, dit carter de culasse 2b. Ce carter de culasse 2b comprend une face inférieure qui est destinée à être fixée sur une face supérieure de ce carter de cylindres 2a, lequel étant disposé en-dessous de ce carter de culasse 2b.The figure 1 is a schematic representation of an embodiment of a heat engine 1 comprising a cylinder casing 2a provided with a plurality of cylinders 3, otherwise called stations, which can be arranged in line. This cylinder casing 2a of the engine 1 may include nonlimiting and non-exhaustive four cylinders 3 arranged in line. Above the cylinder housing 2a, along an axis substantially parallel to the vertical axis of the cylinders 3, is fixed a second housing, said housing 2b cylinder head. This cylinder head cover 2b comprises a lower face which is intended to be fixed on an upper face of the cylinder casing 2a, which is disposed below this cylinder head housing 2b.

Ce carter de culasse 2b renferme notamment la distribution composée principalement des soupapes et des arbres à cames. Plus précisément, dans ce carter de culasse 2b sont ménagés des conduits d'alimentation ou d'admission et des conduits d'échappement qui sont destinés respectivement à l'écoulement d'un mélange air et de gaz admis vers les cylindres du moteur 1, et à l'écoulement des gaz brûlés qui s'échappent hors des cylindres 3. Ces conduits sont commandés par des soupapes, et celles-ci sont actionnées par au moins un arbre à cames.This breech housing 2b includes the distribution mainly composed of valves and camshafts. More specifically, in this cylinder head housing 2b are provided supply or intake ducts and exhaust ducts which are respectively intended for the flow of an air mixture and admitted gas to the cylinders of the engine 1, and the flow of flue gas escaping out of the cylinders 3. These ducts are controlled by valves, and these are actuated by at least one camshaft.

Ce moteur 1 peut être un moteur statique, un moteur d'un générateur électrique. Il peut également s'agir d'un moteur 1 qui est mis en oeuvre dans un véhicule comme un véhicule terrestre notamment un véhicule automobile, ou encore un véhicule marin ou aérien.This engine 1 can be a static engine, a motor of an electric generator. It can also be a motor 1 which is implemented in a vehicle such as a land vehicle including a motor vehicle, or a marine or air vehicle.

Le moteur 1 comporte classiquement un vilebrequin 6 qui tourne autour d'un axe horizontal du moteur 1, des pistons qui coulissent dans des cylindres 3 suivant des mouvements de va-et-vient, et des bielles dont les extrémités hautes sont reliées aux pistons et dont les extrémités basses sont reliées à ce vilebrequin 6 par l'intermédiaire de liaisons excentriques. Le mouvement de va-et-vient des pistons, initié par la combustion d'un mélange d'air et de carburant dans les cylindres 3, permet ainsi d'entraîner en rotation le vilebrequin 6. Le vilebrequin 6 du moteur 1 est guidé en rotation par des paliers qui sont disposés entre chaque cylindre 3 du moteur 1 et de part et d'autre du carter de cylindres 2a typiquement au niveau des sorties 7a, 7b respectives du vilebrequin 6 vers une façade d'accouplement 4a et vers une façade de distribution 4b du moteur 1 d'autre part, lesquelles sorties 7a, 7b étant visibles sur les figures 2 et 3.The engine 1 conventionally comprises a crankshaft 6 which rotates about a horizontal axis of the engine 1, pistons which slide in cylinders 3 in reciprocating motions, and rods whose upper ends are connected to the pistons and whose lower ends are connected to this crankshaft 6 via eccentric connections. The reciprocating movement of the pistons, initiated by the combustion of a mixture of air and fuel in the cylinders 3, thus makes it possible to rotate the crankshaft 6. The crankshaft 6 of the engine 1 is guided by rotation by bearings which are arranged between each cylinder 3 of the engine 1 and on either side of the cylinder casing 2a typically at the respective outlets 7a, 7b of the crankshaft 6 towards a coupling face 4a and towards a frontage of 4b distribution of the engine 1 on the other hand, which outlets 7a, 7b being visible on the Figures 2 and 3 .

La façade d'accouplement 4a est située à une première extrémité du moteur 1. Dans ce mode de réalisation, cette façade d'accouplement 4a est localisée au niveau du carter de cylindres 2a, il peut cependant dans d'autres variantes être située au niveau du carter de culasse 2b. Elle comprend essentiellement un ensemble de transmission comportant un carter d'accouplement 8 et une boîte de vitesse 9, le carter d'accouplement 8 reliant le moteur 1 et donc le vilebrequin 6 à ladite boîte de vitesse 9. Ce carter d'accouplement 8 comprend de manière connue en soit, un volant moteur 10 destiné à être fixé sur le vilebrequin 6 du moteur 1 et un embrayage 11 pouvant comporter un mécanisme d'embrayage et au moins un disque de friction. Un carter 12 coiffant le carter d'accouplement 8 et la boîte de vitesse 9 est fixé à la façade d'accouplement 4a notamment au niveau d'une surface de liaison 14 ayant une forme essentiellement circulaire et qui est visible sur les figures 2 et 11.The coupling face 4a is located at a first end of the engine 1. In this embodiment, this coupling face 4a is located at the cylinder casing 2a, it can however in other variants be located at the level of the casing 2a. the cylinder head 2b. It essentially comprises a transmission assembly comprising a coupling case 8 and a gearbox 9, the coupling case 8 connecting the engine 1 and thus the crankshaft 6 to said gearbox 9. This coupling case 8 comprises in a manner known in itself, a flywheel 10 to be fixed on the crankshaft 6 of the engine 1 and a clutch 11 may comprise a clutch mechanism and at least one friction disc. A casing 12 covering the coupling housing 8 and the gearbox 9 is fixed to the coupling face 4a in particular at a connecting surface 14 having a substantially circular shape and which is visible on the figures 2 and 11 .

Ce moteur 1 est communément équipé d'un certain nombre de périphériques et accessoires, parmi lesquels on peut citer un alternateur et un compresseur de climatisation. Ces accessoires sont entraînés par le fonctionnement du moteur 1, via une courroie d'accessoire généralement reliée à une poulie située en bout d'un vilebrequin 6 du moteur 1, couramment appelée « poulie vilebrequin » et qui est agencé au niveau de la façade de distribution 4b . Cette façade de distribution 4b également appelée façade accessoire, est située à une deuxième extrémité du moteur 1 en étant sensiblement opposée à la façade d'accouplement 4a. Elle comprend essentiellement des poulies portées par les extrémités du vilebrequin 6 et d'un arbre (ou des arbres) à cames, et de la courroie de distribution qui transmet à l'arbre à cames la rotation du vilebrequin 6. La façade de distribution 4b peut inclure également d'autres poulies sur lesquelles agit la courroie de distribution. Elle comporte également des galets grâce auxquels la tension et l'orientation des brins de la courroie de distribution sont réglés.This engine 1 is commonly equipped with a number of peripherals and accessories, among which there may be mentioned an alternator and an air conditioning compressor. These accessories are driven by the operation of the engine 1, via an accessory belt generally connected to a pulley located at the end of a crankshaft 6 of the engine 1, commonly called "crankshaft pulley" and which is arranged at the level of the engine. of the distribution facade 4b. This distribution facade 4b also called accessory facade, is located at a second end of the engine 1 being substantially opposite to the coupling face 4a. It essentially comprises pulleys carried by the ends of the crankshaft 6 and a camshaft (or shafts), and the timing belt which transmits to the camshaft the rotation of the crankshaft 6. The distribution facade 4b may also include other pulleys on which the timing belt acts. It also has rollers by which the tension and the orientation of the strands of the timing belt are adjusted.

En référence aux figures 1 et 4 à 10, le moteur 1 comprend une pompe à fluide caloporteur 5 pour la mise en circulation de ce fluide dans un circuit de refroidissement 15 de ce moteur 1. Cette pompe 5 comprend un corps de pompe 16, un conduit d'entrée 17a de fluide et un conduit de sortie 17b formant une volute de pompe. Cette pompe 5 est destinée à mettre en circulation via le conduit de sortie 17b ledit fluide caloporteur ou fluide de refroidissement dans le circuit de refroidissement 15 du moteur 1. Ainsi que l'illustre les figures 4 et 5, ce circuit 15 comprend des premier et deuxième conduits de fluide 18a, 18b autrement appelés noyau ou chambre de fluide. Chaque conduit de fluide 18a, 18b est un volume creux ou un évidement constitué de canaux de circulation qui est défini dans le carter de cylindres 2a ou le carter de culasse 2b du moteur 1 et dans lequel est destiné à circuler ce fluide de refroidissement, ici de l'eau. Dans cette configuration et en référence à la figure 2, l'entrée de fluide 19a de cette pompe 5 est de préférence noyée dans la façade d'accouplement 4a permettant ainsi d'avoir le conduit d'entrée 17a de fluide dans la façade d'accouplement 4a. On notera que le conduit d'entrée 17a comprend un carter qui est relié mécaniquement à une surface de fixation 28 d'étanchéité définie au niveau de la façade d'accouplement 4a et en particulier d'une peau externe 29 de cette façade 4a. Ce carter peut comprendre un convergent.With reference to figures 1 and 4 to 10 , the engine 1 comprises a heat transfer fluid pump 5 for circulating this fluid in a cooling circuit 15 of the engine 1. This pump 5 comprises a pump body 16, a fluid inlet duct 17a and a outlet duct 17b forming a pump volute. This pump 5 is intended to circulate via the outlet conduit 17b said coolant or cooling fluid in the cooling circuit 15 of the engine 1. As illustrated by the Figures 4 and 5 this circuit 15 comprises first and second fluid conduits 18a, 18b otherwise called core or fluid chamber. Each fluid conduit 18a, 18b is a hollow space or a recess consisting of circulation channels which is defined in the cylinder block 2a or the cylinder head 2b of the engine 1 and in which is intended to circulate this cooling fluid, here some water. In this configuration and with reference to the figure 2 , the fluid inlet 19a of this pump 5 is preferably embedded in the coupling face 4a thereby to have the fluid inlet duct 17a in the coupling face 4a. It will be noted that the inlet duct 17a comprises a casing which is mechanically connected to a sealing surface 28 defined at the level of the facade. coupling 4a and in particular an outer skin 29 of this facade 4a. This housing may include a convergent.

Le corps de pompe 16 est traversé de part et d'autre par un axe de pompe 20. L'axe 20 est immobilisé radialement et axialement par un roulement à bille. On pourrait envisager une pluralité de roulements ou encore un roulement à double rangées de bille permettant de garantir la stabilité et le maintien de l'axe 20 dans le corps de pompe 16. L'une des extrémités de l'axe 20 supporte une aube 21, ou une turbine, adaptée à la circulation du fluide dans le circuit de refroidissement 15, l'autre extrémité comprend une zone de couplage 22.The pump body 16 is traversed on either side by a pump shaft 20. The shaft 20 is immobilized radially and axially by a ball bearing. One could consider a plurality of bearings or a double row ball bearing to ensure the stability and maintenance of the shaft 20 in the pump body 16. One end of the shaft 20 supports a blade 21 , or a turbine, adapted to the circulation of the fluid in the cooling circuit 15, the other end comprises a coupling zone 22.

L'aube 21 est rendu solidaire de l'axe par exemple par un dispositif de clavette bien connu de l'homme du métier. On pourrait également envisager de solidariser l'aube 21 à l'axe 20 par un emmanchement serré, avantageusement associé à un jeu de rainures, ou par tout autre moyen connu.The blade 21 is secured to the axis for example by a key device well known to those skilled in the art. One could also consider securing the blade 21 to the axis 20 by a tight fitting, advantageously associated with a set of grooves, or by any other known means.

L'étanchéité eau/air entre l'axe 20 et le corps 16, destinée à empêcher le fluide de refroidissement de pénétrer à l'intérieur de la pompe 5 et d'endommager le roulement, est assurée par un élément d'étanchéité 23a dynamique pour une première variante de la pompe 5 illustrée sur la figure 9 ou deux éléments d'étanchéité 23a, 23b dynamique pour une deuxième variante visible sur la figure 10. L'élément d'étanchéité 23a, 23b dynamique peut être un joint à lèvre et plus particulièrement un joint torique garantissant une excellente étanchéité. Le corps de pompe 16 comprend également une zone de fixation 24 pourvue d'au moins un joint torique 25 visant à assurer une liaison mécanique étanche de la pompe 5 dans un logement 26 défini dans la façade d'accouplement 4a du moteur 1, notamment avec une paroi de ce logement 26. Le corps de pompe 16 comprend également au moins un passage d'air 27 permettant d'évacuer par évaporation, le fluide de refroidissement qui pourrait pénétrer à l'intérieur de la pompe 5 malgré la présence des éléments d'étanchéité 23a, 23b.The water / air seal between the axis 20 and the body 16, intended to prevent the cooling fluid from entering the inside of the pump 5 and damaging the bearing, is provided by a dynamic sealing element 23a for a first variant of the pump 5 illustrated on the figure 9 or two dynamic sealing elements 23a, 23b for a second variant visible on the figure 10 . The dynamic sealing element 23a, 23b may be a lip seal and more particularly an O-ring guaranteeing excellent sealing. The pump body 16 also comprises an attachment zone 24 provided with at least one O-ring 25 intended to ensure a sealed mechanical connection of the pump 5 in a housing 26 defined in the coupling face 4a of the engine 1, in particular with a wall of this housing 26. The pump body 16 also comprises at least one air passage 27 for evacuating by evaporation, the cooling fluid that could penetrate inside the pump 5 despite the presence of the sealing elements 23a, 23b.

Sur la figure 2, le logement 26 est compris dans une partie de la façade d'accouplement 4a qui est définie au niveau du carter de cylindres 2a. Un tel logement 26 a une forme complémentaire à celle de la pompe 5. Le logement 26 comprend une ouverture 30 qui est définie au niveau d'une zone 31 de la peau externe 29 de la façade d'accouplement 4a. Selon l'invention, cette ouverture 30 est agencée en regard du volant moteur 10 du carter d'accouplement 8. Le logement 26 et donc cette ouverture 30 sont définis entre la surface de liaison 14 et un orifice formant la sortie 7a qui est ménagé dans la façade d'accouplement 4a et qui est traversé par une extrémité du vilebrequin 6 prévue pour être reliée au volant moteur 10.On the figure 2 , the housing 26 is included in a portion of the coupling face 4a which is defined at the cylinder housing 2a. Such a housing 26 has a shape complementary to that of the pump 5. The housing 26 comprises an opening 30 which is defined at a zone 31 of the outer skin 29 of the coupling face 4a. According to the invention, this opening 30 is arranged facing the flywheel 10 of the coupling housing 8. The housing 26 and therefore this opening 30 are defined between the connecting surface 14 and an orifice forming the outlet 7a which is formed in the coupling face 4a and which is crossed by an end of the crankshaft 6 provided to be connected to the flywheel 10.

On notera que ce logement 26 de la pompe 5 est situé à une hauteur h1 qui s'étend du fond du carter d'huile 32 du moteur 1 à la pompe 5 qui est inférieure à une hauteur h2 comprise entre en ce fond du carter d'huile 32 et le circuit de refroidissement 15 du moteur 1 et en particulier du premier conduit 18a. Ainsi, la pompe 5 est située dans une partie basse du moteur 1 et de préférence à une hauteur h1 qui la positionne à un niveau qui est situé en dessous du niveau du premier conduit 18a relatif à la hauteur h2. Ainsi la pompe 5 est alors constamment dans le fluide de refroidissement et ce même lors de phases de remplissage ou de re-remplissage après-vente ainsi que dans des phases de dégazage du circuit de refroidissement 15. Une telle position de la pompe 5 permet d'éviter des défaillances de type « grillage de joint » notamment lors du déroulement de ces phases et qui peuvent par exemple résulter de la présence de bulle de gaz et/ou d'absence de fluide de refroidissement dans le circuit 15.It will be noted that this housing 26 of the pump 5 is located at a height h1 which extends from the bottom of the oil sump 32 of the engine 1 to the pump 5 which is less than a height h2 between the bottom of the oil sump. oil 32 and the cooling circuit 15 of the engine 1 and in particular the first conduit 18a. Thus, the pump 5 is located in a lower part of the engine 1 and preferably at a height h1 which positions it at a level which is located below the level of the first conduit 18a relative to the height h2. Thus the pump 5 is then constantly in the cooling fluid and this even during filling or refilling after-sales phases as well as in degassing phases of the cooling circuit 15. Such a position of the pump 5 makes it possible to to avoid failures of the "joint grout" type, in particular during the unfolding of these phases, which may for example result from the presence of a gas bubble and / or the absence of cooling fluid in the circuit 15.

On notera que lorsque la pompe 5 est agencée dans ce logement 26, l'aube 21 est orientée vers l'ouverture 30 soit vers l'extérieur de la façade d'accouplement 4a.It will be noted that when the pump 5 is arranged in this housing 26, the blade 21 is oriented towards the opening 30 or towards the outside of the coupling face 4a.

La zone de couplage 22 de la pompe 5 est adaptée pour coopérer de manière directe ou indirecte avec un arbre d'entraînement 33 du moteur 1, ledit arbre 33 pouvant être en relation cinématique avec le vilebrequin 6. Dans ces conditions, la pompe 5 est donc agencée dans le moteur 1 de façon à être en relation cinématique avec ce vilebrequin 6 notamment par l'intermédiaire dudit arbre d'entraînement 33. Dans le présent mode de réalisation, cet arbre d'entraînement 33 est de préférence un arbre d'équilibrage 33 du moteur 1.The coupling zone 22 of the pump 5 is adapted to cooperate directly or indirectly with a drive shaft 33 of the motor 1, said shaft 33 being in kinematic relation with the crankshaft 6. Under these conditions, the pump 5 is therefore arranged in the engine 1 so as to be in kinematic relationship with the crankshaft 6 in particular via said drive shaft 33. In the present embodiment, the drive shaft 33 is preferably a balancing shaft 33 of the engine 1.

Le moteur 1 comprend en effet deux arbres d'équilibrage 33 montés en rotation autour d'axes d'équilibrage parallèles et distincts de l'axe moteur 1. Ces arbres d'équilibrage 33 dont un est visible sur la figure 6, sont agencés dans des tunnels 34 définis dans le moteur 1. Les extrémités de ces tunnels 34 sont visibles sur les figures 2 et 3 relatives respectivement aux façades d'accouplement 4a et de distribution 4b du moteur 1The engine 1 comprises indeed two balancing shafts 33 mounted in rotation about balancing axes parallel and distinct from the motor axis 1. These balancing shafts 33, one of which is visible on the figure 6 , are arranged in tunnels 34 defined in the engine 1. The ends of these tunnels 34 are visible on the Figures 2 and 3 relating respectively to the clutch facings 4a and 4b distribution of the engine 1

Ces arbres d'équilibrage 33 peuvent être en relation cinématique avec le vilebrequin 6. Plus précisément, le moteur 1 comprend des éléments d'entraînement en rotation du :

  • premier arbre d'équilibrage 33, dans un sens de rotation inverse du sens de rotation du vilebrequin 6 et à une vitesse de rotation fonction de la vitesse de rotation dudit vilebrequin 6, et
  • deuxième arbre d'équilibrage, dans un sens de rotation inverse du sens de rotation dudit premier arbre d'équilibrage et à une vitesse de rotation fonction de la vitesse de rotation dudit vilebrequin 6.
These balancing shafts 33 can be in kinematic relation with the crankshaft 6. More specifically, the engine 1 comprises elements for rotating the:
  • first balancing shaft 33, in a direction of rotation opposite to the direction of rotation of the crankshaft 6 and at a speed of rotation which is a function of the speed of rotation of said crankshaft 6, and
  • second balancing shaft, in a direction of rotation opposite to the direction of rotation of said first balancing shaft and at a speed of rotation dependent on the speed of rotation of said crankshaft 6.

Ces arbres d'équilibrage 33 contribuent à amortir une partie des vibrations qui sont gênantes non seulement pour les occupants du véhicule automobile, mais aussi pour la fiabilité du moteur 1. Cette partie des vibrations résulte :

  • à bas régime de l'explosion du mélange d'air et de carburant dans les cylindres 3 ce qui génère en effet un « moment vibratoire de combustion » très important, et
  • à haut régime des mouvements alternatifs des pistons, des bielles et du vilebrequin 6, ces mouvements génèrent en effet un « effort vibratoire d'inertie » et un « moment vibratoire d'inertie » très importants.
These balance shafts 33 help to damp some of the vibrations that are troublesome not only for the occupants of the motor vehicle, but also for the reliability of the engine 1. This part of the vibrations results:
  • at low speed of the explosion of the mixture of air and fuel in the cylinders 3, which generates a very important "vibratory moment of combustion", and
  • at high speed reciprocating pistons, connecting rods and crankshaft 6, these movements generate in fact a "vibratory force of inertia" and a "vibratory moment of inertia" very important.

Ainsi ces arbres d'équilibrage 33 en tournant, génère des effort et moment d'inertie qui s'opposent aux effort et moments vibratoires précités.Thus, these balancing shafts 33 rotating, generates effort and moment of inertia that oppose the aforementioned vibratory forces and moments.

Les éléments d'entraînement en rotation sont reliés pour chaque arbre d'équilibrage 33 à une première extrémité de ce dernier comportant une roue d'entraînement 35 telle qu'une poulie. Le corps de chacun de ces arbres 33 comprend des organes de roulement 36 choisis parmi des billes, des aiguilles et des rouleaux. Un des deux arbres d'équilibrage 33 constitue un arbre d'entraînement 33 de l'axe de pompe 20 et comprend à cet effet dans une deuxième extrémité un organe de couplage destiné à assurer une liaison cinématique avec la zone de couplage 22 de la pompe 5. Autrement dit, la zone de couplage 22 est apte à être en prise avec l'organe de couplage de l'arbre d'entraînement 33. Pour ce faire, le logement 26 dans lequel est agencé la pompe 5, comprend un fond qui est ouvert car comportant un orifice, et qui débouche dans le tunnel 34 dans lequel est agencé cet arbre d'équilibrage 33 pour l'établissement d'une liaison de couplage entre la zone de couplage 22 et l'organe de couplage de cet arbre 33. Dans ce contexte, ce logement 26 peut donc être réalisé par usinage en même temps ou du moins avec une bonne précision par rapport à ce tunnel 34. On notera que la liaison de couplage entre la pompe 5 et l'arbre d'équilibrage est simplifiée car elle ne nécessite pas l'usage d'un joint d'accouplement complexe. Dans une variante, la liaison de couplage peut être réalisée sans joint d'accouplement mais uniquement à partir d'un mécanisme de vissage de l'axe de pompe 20 sur l'arbre d'équilibrage 33.The rotational drive members are connected for each balance shaft 33 at a first end thereof having a drive wheel 35 such as a pulley. The body of each of these shafts 33 comprises rolling members 36 selected from balls, needles and rollers. One of the two balance shafts 33 constitutes a drive shaft 33 of the pump shaft 20 and comprises for this purpose in a second end a coupling member for providing a kinematic connection with the coupling zone 22 of the pump. 5. In other words, the coupling zone 22 is adapted to be engaged with the coupling member of the drive shaft 33. To do this, the housing 26 in which the pump 5 is arranged comprises a bottom which is open because having an orifice, and which opens into the tunnel 34 in which is arranged the balancing shaft 33 for the establishment of a coupling link between the coupling zone 22 and the coupling member of this shaft 33 In this context, this dwelling 26 can therefore be made by machining at the same time or at least with good accuracy with respect to this tunnel 34. Note that the coupling connection between the pump 5 and the balancing shaft is simplified because it does not require the use of a complex coupling joint. In a variant, the coupling connection can be made without a coupling joint but only from a screw mechanism of the pump shaft 20 on the balancing shaft 33.

Dans cette configuration, l'utilisation d'un arbre d'entraînement 33 tel que l'arbre d'équilibrage 33 pour entraîner la pompe 5, vise à appliquer un couple réalisant peu voire aucun effort latéral sur l'axe de pompe 20. Ainsi, le roulement de la pompe 5 est donc peu sollicité. Une telle configuration permet d'améliorer la robustesse de la pompe 5 et/ou sa compacité, et/ou à la réduction de son coût de fabrication.In this configuration, the use of a drive shaft 33 such as the balancing shaft 33 to drive the pump 5, aims to apply a torque achieving little or no lateral force on the pump shaft 20. Thus , the bearing of the pump 5 is therefore little solicited. Such a configuration makes it possible to improve the robustness of the pump 5 and / or its compactness, and / or to reduce its manufacturing cost.

Sur les figures 1, 2 et 11, le moteur 1 comprend également un boîtier 13 d'entrée et de sortie du fluide caloporteur circulant dans le circuit de refroidissement 15. Ce boîtier 13 est de préférence agencé dans la façade d'accouplement 4a. En particulier, le boîtier 13 est positionné entre le carter de culasse 2b et le carter d'accouplement 8, notamment entre le carter de culasse 2b et le support de liaison 14.On the Figures 1, 2 and 11 , the engine 1 also comprises a housing 13 for input and output of the coolant circulating in the cooling circuit 15. This housing 13 is preferably arranged in the coupling face 4a. In particular, the housing 13 is positioned between the breech housing 2b and the coupling housing 8, in particular between the breech housing 2b and the connection support 14.

Dans ce mode de réalisation et en référence aux figures 1, 2, 4 et 5, le boîtier 13 est relié à une entrée 19a et deux sorties 19b, 19c du circuit de refroidissement 15. Ainsi, ce boîtier 13 en centralisant toutes les entrée et sorties 19a, 19b, 19c du circuit de refroidissement 15 peut permettre une mise oeuvre d'un pilotage simplifié de circulations multiples du fluide dans le circuit de refroidissement 15. Les entrée et sorties 19a, 19b, 19c de ce circuit sont noyées dans la façade d'accouplement 4a. Dans cette configuration, le fluide pénètre dans cette entrée du circuit afin d'être acheminé vers la pompe 5 pour être ensuite mis en circulation dans les premier et deuxième conduits 18a, 18b de fluide selon le sens de circulation représenté par les flèches présentes sur les figures 1, 4 et 5. Ce fluide est ensuite évacué au niveau des sorties 19b, 19c respectivement des premier et deuxième conduits 18a, 18b de fluide débouchant dans le boîtier 13. Ces sorties 19b, 19c peuvent comprendre des éléments d'ouverture/fermeture 37 automatique permettant de gérer l'évacuation du fluide selon la température de celui-ci et par conséquent la circulation du fluide dans le circuit 15. En effet, chaque élément d'ouverture/fermeture 37 est prévu pour autoriser/interdire le passage du fluide par les sorties 19b, 19c. Sur la figure 12, chaque élément d'ouverture/fermeture 37 peut comprendre un volet 38 et un élément de rappel 39 tel qu'un ressort réalisé en un matériau à mémoire de forme.In this embodiment and with reference to Figures 1, 2 , 4 and 5 , the housing 13 is connected to an inlet 19a and two outputs 19b, 19c of the cooling circuit 15. Thus, this housing 13 by centralizing all the inputs and outputs 19a, 19b, 19c of the cooling circuit 15 can allow an implementation of simplified control of multiple circulations of the fluid in the cooling circuit 15. The inputs and outputs 19a, 19b, 19c of this circuit are embedded in the coupling face 4a. In this configuration, the fluid enters this input of the circuit to be routed to the pump 5 to be then circulated in the first and second conduits 18a, 18b of fluid in the direction of circulation represented by the arrows present on the figures 1 , 4 and 5 . This fluid is then discharged at the outlets 19b, 19c respectively of the first and second conduits 18a, 18b of fluid opening into the housing 13. These outlets 19b, 19c may include automatic opening / closing elements 37 to manage the evacuation of the fluid according to the temperature thereof and therefore the circulation of the fluid in the circuit 15. Indeed, each opening / closing element 37 is provided to allow / prohibit the passage of fluid through the outlets 19b, 19c. On the figure 12 each opening / closing element 37 may comprise a flap 38 and a return element 39 such as a spring made of a shape memory material.

On remarquera que la pompe 5 débite un fluide dans un circuit de refroidissement 15 qui est simplifié en termes de packaging autorisant des circulations d'eau simples ou plus complexes de tous types permettant ainsi de mettre en oeuvre des modes de fonctionnement du circuit de refroidissement 15 par exemple en « split cooling » ou encore en boucle unique ou multiples.It will be noted that the pump 5 delivers a fluid in a cooling circuit 15 which is simplified in terms of packaging allowing simple or more complex water circulations of all types, thus making it possible to implement modes of operation of the cooling circuit 15 for example in "split cooling" or in single or multiple loop.

Claims (8)

  1. Internal combustion engine (1) comprising a coolant pump (5) designed to circulate said coolant in a cooling circuit (15) of said engine (1), said pump (5) being arranged in a coupling façade (4a) of the engine (1), being kinematically linked with a driveshaft (33) of the engine (1), in particular a balancing shaft of this engine (1), the coupling facade (4a) comprising a recess (26) in which said pump (5) is arranged, characterized in that said recess (26) comprises an opening (30) arranged facing an engine flywheel (10) of a coupling casing (8) of said engine (1).
  2. Engine (1) according to the preceding claim, characterized in that:
    - the recess (26) is contained in the coupling facade (4a) of a cylinder block (2a) of the engine (1), and/or
    - the recess (26) comprises a bottom that opens into a tunnel (34) provided in the engine (1) for receiving said driveshaft (33), and/or
    - the recess (26) comprises an opening (30) defined in an external skin (29) of the coupling facade (4a) .
  3. Engine (1) according to either one of the preceding claims, characterized in that a recess (26) capable of receiving the pump (5) is defined at a height (h1) that is less than a height (h2) of the cooling circuit (15) .
  4. Engine (1) according to any one of the preceding claims, characterized in that the pump (5) comprises a coupling zone (22) that is able to be in engagement with a coupling member of the driveshaft (33).
  5. Engine (1) according to any one of the preceding claims, characterized in that it comprises a coolant inlet and outlet housing (13) connected to said pump (5) and to the cooling circuit (15), arranged at the coupling facade (4a).
  6. Engine (1) according to any one of the preceding claims, characterized in that the pump (5) comprises at least one dynamic seal.
  7. Engine (1) according to any one of the preceding claims, characterized in that the pump (5) is kinematically linked with a crankshaft (6) of the engine (1), in particular via the intermediary of said driveshaft (33).
  8. Vehicle, in particular a motor vehicle, comprising an internal combustion engine (1) according to any one of the preceding claims.
EP17158620.9A 2016-05-13 2017-03-01 Internal combustion engine comprising a coolant pump Active EP3244034B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1654304A FR3051222B1 (en) 2016-05-13 2016-05-13 THERMAL MOTOR COMPRISING A HEAT PUMP PUMP

Publications (2)

Publication Number Publication Date
EP3244034A1 EP3244034A1 (en) 2017-11-15
EP3244034B1 true EP3244034B1 (en) 2019-09-11

Family

ID=56896678

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17158620.9A Active EP3244034B1 (en) 2016-05-13 2017-03-01 Internal combustion engine comprising a coolant pump

Country Status (2)

Country Link
EP (1) EP3244034B1 (en)
FR (1) FR3051222B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3093135B1 (en) 2019-02-26 2022-07-08 Renault Sas Heat engine comprising a heat transfer fluid pump

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005026786A1 (en) * 2005-06-10 2006-12-21 Audi Ag Automotive seal located between mass balance compensation module and pump shaft has a dynamic seal and a static seal mounted on a common base
JP5932574B2 (en) * 2012-08-31 2016-06-08 本田技研工業株式会社 Water-cooled internal combustion engine for vehicles
DE102014207071B4 (en) * 2014-04-11 2018-09-20 Volkswagen Aktiengesellschaft Internal combustion engine with a crankcase and a coolant pump

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
FR3051222B1 (en) 2019-10-11
EP3244034A1 (en) 2017-11-15
FR3051222A1 (en) 2017-11-17

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