EP3555457B1 - Duct for the passage of liquid coolant for an internal combustion engine of a motor vehicle - Google Patents
Duct for the passage of liquid coolant for an internal combustion engine of a motor vehicle Download PDFInfo
- Publication number
- EP3555457B1 EP3555457B1 EP17825423.1A EP17825423A EP3555457B1 EP 3555457 B1 EP3555457 B1 EP 3555457B1 EP 17825423 A EP17825423 A EP 17825423A EP 3555457 B1 EP3555457 B1 EP 3555457B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- engine
- cooling circuit
- liquid coolant
- passage
- tubular portion
- 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.)
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Links
- 239000002826 coolant Substances 0.000 title claims description 46
- 238000002485 combustion reaction Methods 0.000 title claims description 19
- 239000007788 liquid Substances 0.000 title claims description 12
- 238000001816 cooling Methods 0.000 claims description 40
- 238000010438 heat treatment Methods 0.000 claims description 12
- 238000011144 upstream manufacturing Methods 0.000 claims description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims 1
- 238000005266 casting Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 239000007789 gas Substances 0.000 description 8
- 239000003344 environmental pollutant Substances 0.000 description 7
- 231100000719 pollutant Toxicity 0.000 description 7
- 239000000110 cooling liquid Substances 0.000 description 6
- 239000000446 fuel Substances 0.000 description 6
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 230000008929 regeneration Effects 0.000 description 4
- 238000011069 regeneration method Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000003685 thermal hair damage Effects 0.000 description 1
Images
Classifications
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- 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
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
- F01P11/14—Indicating devices; Other safety devices
- F01P11/20—Indicating devices; Other safety devices concerning atmospheric freezing conditions, e.g. automatically draining or heating during frosty weather
-
- 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
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
- F01P11/04—Arrangements of liquid pipes or hoses
-
- 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
- F01P2037/00—Controlling
- F01P2037/02—Controlling starting
-
- 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
- F01P2060/00—Cooling circuits using auxiliaries
- F01P2060/04—Lubricant cooler
-
- 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
- F01P2060/00—Cooling circuits using auxiliaries
- F01P2060/08—Cabin heater
-
- 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
- F01P2070/00—Details
- F01P2070/04—Details using electrical heating elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N19/00—Starting aids for combustion engines, not otherwise provided for
- F02N19/02—Aiding engine start by thermal means, e.g. using lighted wicks
- F02N19/04—Aiding engine start by thermal means, e.g. using lighted wicks by heating of fluids used in engines
- F02N19/10—Aiding engine start by thermal means, e.g. using lighted wicks by heating of fluids used in engines by heating of engine coolants
Definitions
- the present invention relates to the field of cooling circuits for internal combustion engines, in particular for motor vehicles.
- a motor vehicle comprising an internal combustion engine is equipped with a cooling circuit intended to regulate the temperature of the engine.
- the temperature is lowered by the passage of a cooling liquid whose circulation is generated by a pump.
- the liquid is conventionally called water but most of the time corresponds to a glycol water type coolant.
- exhaust gas recirculation conduit also known by the Anglo-Saxon name “Exhaust Gas Recirculation” or by the abbreviation “EGR”.
- EGR Exhaust Gas Recirculation
- the function of such a conduit is to take exhaust gases at the outlet of the internal combustion engine to reinject them into an intake conduit of the engine. In this way, the recirculation duct makes it possible to limit fuel consumption and pollutant emissions.
- housings can be used comprising means for heating the coolant of the engine cooling circuit.
- the box is connected to a first point of the cooling circuit via a first hose and to a second point of the cooling circuit via a second hose.
- the coolant circulating in the cooling circuit passes through the first hose, is heated as it passes through the housing, then rejoins the cooling circuit through the second hose. Due to heating of the coolant, exhaust gas recirculation is activated more quickly.
- the invention aims to provide a cooling circuit component of an internal combustion engine overcoming the aforementioned drawbacks.
- the invention aims to allow the heating of the coolant while optimizing the heat exchange efficiency caused during heating, in order to limit fuel consumption and emissions of pollutants, and by limiting the size generated within the engine compartment.
- a coolant passage conduit for an internal combustion engine of a motor vehicle comprising a tubular portion to allow the passage of a coolant from an engine cooling circuit, said tubular portion comprising an upstream end intended to be connected to a first functional member of the engine, and a downstream end opposite the upstream end and intended to be connected to a second functional member of the engine.
- the tubular portion comprises at least one receiving orifice capable of receiving at least one element for heating the cooling liquid.
- the passage conduit comprises a branch intended to be connected to a unit heater of the cooling circuit.
- a branching makes it possible to directly bring the coolant having passed through the air heater to circulate through the second functional member of the engine.
- Such a passage conduit makes it possible to heat the coolant while limiting the space generated within the engine compartment.
- the coolant is heated near the engine so as to allow the engine to heat up more quickly. This improves the cold starting conditions to enable faster activation of the exhaust gas recirculation.
- the heated passage duct further provides an additional heat source that helps warm a charge air cooler with anticipation. These effects notably result in better treatment of pollutants and lower fuel consumption.
- the first functional member of the engine is an oil cooler and/or the second functional member of the engine is an engine cylinder block or a coolant pump.
- Arranging the passage conduit fitted with a heating element between the oil cooler and the coolant pump, and in particular just upstream of the coolant pump, makes it possible in particular to circulate the liquid hot cooling in the water pump, which is close to the engine. This further heats the exhaust gases to open the exhaust gas recirculation valve even earlier and further heat the charge air cooler.
- the passage conduit consists of a single piece made by molding, preferably in aluminum.
- the passage conduit comprises at least four receiving orifices each capable of receiving a preheating plug.
- glow plugs are particularly advantageous in that it makes it possible to sufficiently increase the engine load during regeneration of the particle filter.
- Glow plugs are also known as immersion heaters.
- said at least four receiving orifices are arranged in a staggered manner.
- said at least one receiving orifice comprises a cylindrical bore of small diameter extending outwards from an internal wall of the tubular portion, and a cylindrical bore of large diameter extending towards the interior from a wall located outside the tubular portion, the two cylindrical bores being coaxial, the two cylindrical bores being connected by a frustoconical bore whose generators form an angle of between 58° and 66° with the common axial direction of said two cylindrical bores.
- Such a design of said at least one receiving orifice allows easy installation of a preheating plug, while maintaining a reinforced seal of the coolant passage conduit.
- the passage duct comprises an ear for fixing to a cylinder block of the engine.
- Such an ear makes it possible to prevent the transmission of vibrations from the cylinder block to the passage duct.
- an internal combustion engine for a motor vehicle comprising a cylinder block, a cooling circuit, a first functional member, a second functional member and a coolant passage conduit as defined above.
- the engine comprises a coolant pump delimited by a pump housing, said pump housing being at least partially formed by a portion of the cylinder housing.
- Such an embodiment is particularly advantageous in that the coolant heated by said at least one heating element is directly in contact with the cylinder block. As a result, thermal losses are minimized during the transfer of energy from the heated coolant to the internal combustion engine. In this way, by providing a minimum of energy, the temperature rise of the internal combustion engine is further increased so as to further limit fuel consumption and pollutant emissions.
- the engine 2 is intended to be incorporated into a motor vehicle.
- the engine 2 can be a spark ignition engine or a compression ignition engine.
- the engine 2 notably comprises at least one cylinder (not shown) inside which combustion takes place.
- the cylinder is delimited by a cylinder block 4 schematically represented on the figure 1 by the rectangular frame surrounding the combustion engine 2.
- the engine 2 is associated with a cooling circuit 6.
- the function of the cooling circuit 6 is to regulate the temperature of the engine 2.
- the cooling circuit 6 comprises a plurality of members, some of which cooperate directly with the engine 2. These members are designated in the present application as being functional members of the engine.
- the cooling circuit 6 includes a coolant pump 8, also known as a water pump.
- the function of pump 8 is to activate the circulation of the coolant in circuit 6 passing through engine 2 before cooling the latter.
- the pump 8 is delimited by a pump casing 10, schematically represented on the figure 1 by the rectangular frame surrounding the pump 8. In a manner known per se, the pump 8 is driven directly by the internal combustion engine 2. The pump 8 is thus a functional member of the engine 2.
- the compression chamber of the pump 8 is only partially delimited by the pump casing 10.
- the pump casing 10 is fixed on the cylinder block 4.
- the compression chamber of the pump 8 is delimited partially by the pump casing 10 and partially by the cylinder casing 4.
- the cooling circuit 6 further comprises an air heater 12.
- the function of the air heater 12 is to allow heating of the passenger compartment of the motor vehicle while cooling the coolant of the circuit 6.
- Circuit 6 further comprises a radiator 14.
- Radiator 14 is provided to cool the cooling liquid by convection.
- the radiator 14 can be placed just behind the grille of the motor vehicle, so as to be able to effectively cool the coolant circulating in circuit 6.
- the circuit 6 further comprises an oil cooler 16.
- the oil cooler 16 is used to regulate the temperature of the oil of the engine 2.
- the cooler 16 is then a member functional of engine 2.
- the oil cooler 16 is directly fixed on the cylinder block 4 of engine 2.
- the cooling circuit 6 comprises a plurality of conduits for passing the coolant between the members 8, 12, 14 and 16.
- the circuit 6 comprises a first common conduit 18 connecting a water outlet housing 17 to a bifurcation point (not referenced).
- the pipe 18 is divided into a first sub-pipe 20 and a second sub-pipe 22.
- the sub-pipe 20 connects the bifurcation point to the unit heater 12.
- the sub-pipe 22 connects the bifurcation point at radiator 14.
- the water outlet box 17 comprises an inlet opening communicating with the water circuit of a cylinder head 5 and an outlet placed in fluid communication with the first common pipe 18.
- the cooling circuit further comprises a second pipe 24 connecting the radiator 14 to the oil cooler 16.
- the cooling circuit 6 also comprises a third pipe 26 connected to the air heater 12.
- the direction of circulation of the coolant in the lines 18 to 26 is schematically represented by the figure 1 by arrows.
- the water pump 8 is arranged upstream of the engine 2, according to the direction of flow of the coolant in the cooling circuit 6.
- the pump 8 allows water to flow through the cylinder block 4 and the cylinder head 5 of engine 2.
- the coolant leaves the cylinder head 5 through the outlet box 17 to which the pipe 18 is connected.
- the cooling liquid cooling passing through the air heater 12 leaves the water outlet box 17 via line 18, passes the bifurcation point, takes line 20, crosses the air heater 12 then takes line 26.
- the cooling liquid passing through the radiator 14 and the cooler 16 leaves the water outlet box 17 via line 18, passes the bifurcation point, takes line 22, crosses the radiator 14, takes line 24 and reaches the cooler 16.
- the cooling circuit 6 further comprises a passage conduit 28, schematically represented on the figure 1 and represented in isometric view on the figure 2 .
- One function of the passage conduit 28 is to connect the oil cooler 16, the coolant pump 8 and the pipe 26 coming from the air heater 12.
- the passage conduit 28 allows connection only of the oil cooler 16 to the coolant pump 8, in particular via an interface of the cylinder block 4 intended to receive the coolant pump 8.
- the cooling circuit then includes another tapping point for line 26.
- the passage conduit 28 comprises a tubular portion 30.
- the portion 30 is of bent shape to better adapt to the environment of the engine compartment.
- the tubular portion 30 has a substantially constant circular section.
- the tubular portion 30 comprises a first upstream end 32 and a second downstream end 34.
- Each end 32, 34 is provided with a stop flange 36 and an annular groove 38.
- the upstream end 32 is configured to be able to be directly connected to an outlet (not shown) of the oil cooler 16. More particularly, the end 32 is inserted into a cylindrical opening provided in the oil cooler 16, such so that the flange 36 abuts against a wall of the oil cooler 16. An annular seal can be inserted into the groove 38, so as to provide sufficient sealing of the connection of the passage conduit 28 to the oil cooler 16 .
- downstream end 34 is configured to be able to be directly connected to an inlet (not shown) of the cylinder block 4 which can partly define the body of the coolant pump 8.
- the end 34 is in l species inserted in a cylindrical opening provided the cylinder block 4, the flange 36 abutting against a wall of the pump 8, an annular seal being inserted in the groove 38.
- the conduit 28 may also include a branch 40.
- the branch 40 is stitched directly onto the tubular portion 30 of the passage conduit 28.
- the branch 40 has an end 42 forming a cylindrical sleeve 44 for connection with the conduit 26.
- the end 42 includes a stop flange 46.
- the passage conduit 28 is directly connected to the oil cooler 16 and to the cylinder block 4, and indirectly connected to the air heater 12 via the conduit 26. By these three connections, the passage conduit 28 is fixed isostatically relative to the cylinder block 4.
- the passage conduit 28 further comprises a fixing ear 48.
- the ear 48 extends from the branch 40, the ear 48 can extend from a different portion of the passage conduit 28, for example the tubular portion 30.
- the fixing ear 48 is provided to allow fixing of the passage conduit 28 on the cylinder block 4.
- the fixing ear 48 makes it possible to fix the conduit 28 in a simple manner, for example by means of a screw cooperating with a corresponding threaded bore made in the cylinder block 4.
- the fixing ear 48 makes it possible to prevent the transmission of vibrations from the cylinder block 4 to the passage conduit 28.
- the passage conduit 28 further comprises four local protuberances 50 extending from the tubular portion 30.
- Each protuberance extends substantially radially projecting out of the tubular portion 30.
- a sectional view of a local protuberance 50 is shown on the Figure 3 .
- Each protuberance 50 is intended to receive an element for heating the coolant circulating in the passage conduit 28.
- the heating means is an electric preheating plug (not shown).
- four electric preheating plugs are intended to be respectively mounted in the four local protuberances 50.
- glow plugs powered by electrical power are between 250 W and 350 W for each candle, and even more preferably substantially 300 W each.
- electrical power is between 250 W and 350 W for each candle, and even more preferably substantially 300 W each.
- the four protuberances 50 extend from the tubular portion 30 substantially in the same direction.
- Each protuberance 50 comprises a front wall 49 opposite the tubular portion 30.
- a local protuberance 50 includes a receiving orifice 52 capable of receiving a preheating plug. More particularly, the receiving orifice 52 is through.
- the receiving orifice 52 extends from an internal wall 51 of the tubular portion 30, crosses the tubular portion 30 over its entire thickness, crosses the local protuberance 50 and opens outside the portion tubular 30 and the protuberance 50, at the level of the wall 49.
- the receiving orifice 52 has a generally axisymmetric shape around an axis of cylindricity 53 and is made up of several successive cylindrical and/or frustoconical bores around the axis 53. In the example illustrated, axis 53 coincides with the direction in which the corresponding protrusion 50 extends.
- the receiving orifice 52 comprises a first cylindrical bore 54 adjacent to the lower wall 51.
- the axis of cylindricity of the bore 54 coincides with the axis 53.
- the The bore 54 is extended by a first frustoconical bore 56.
- the axis of cylindricity of the bore 56 also coincides with the axis 53.
- the frustoconical bore 56 has the shape of a truncated cylinder whose generators form an angle ⁇ relative to axis 53. In the example illustrated, the angle ⁇ is between 58° and 66°, preferably between 60° and 64° and even more preferably is substantially equal to 60°.
- the frustoconical bore 56 is extended by a second cylindrical bore 58.
- the axis of cylindricity of the bore 58 coincides with the axis 53.
- the bore 58 has a diameter greater than that of the bore 54.
- the bore 58 comprises a tapping 59 capable of cooperating with a corresponding thread made on a complementary cylindrical wall of the preheating plug.
- the cylindrical bore 58 is extended by a second frustoconical bore 60.
- the frustoconical bore 60 forms a truncated cylinder whose generators form an angle ⁇ with the axis 53. In the example illustrated, the angle ⁇ is substantially equal to 45°.
- a glow plug (not shown) can be introduced into the bores 60, 58, 56 and 54.
- the bore 60 provides an entry chamfer of the port 52 in order to to facilitate the insertion of the glow plug.
- the glow plug has a shoulder of design complementary to that of the frustoconical bore 56. In this way, the shoulder of the glow plug abuts against the frustoconical bore 56. This strengthens the seal supplied at the receiving orifice 52 and the preheating plug with respect to the coolant circulating in the passage conduit 28.
- the seal is reinforced thanks to the optimal shape of the bore 56 and the value of the angle ⁇ formed by its generators.
- the preheating plug is simply and reliably fixed in the receiving orifice 52.
- the reception orifices 52 extend between the internal wall 51 of the conduit 28 and the front wall 49 of the protuberances 50.
- This arrangement is particularly advantageous in that it allows reliable and watertight installation of the glow plugs.
- the thickness of the tubular portion 30 must be greater if we wish to obtain a reliable and waterproof installation.
- the embodiment illustrated in the figures, including in particular the orifices 52 partially located in the local protuberances 50 thus makes it possible to save material and limit the size and mass of the passage conduit 28.
- the four local protuberances 50 and the four receiving orifices 52 are arranged approximately staggered relative to each other. Such an arrangement is particularly advantageous because it allows the preheating plugs to be supplied with an electric cable (not shown) allowing the circulation of a power current, limiting the bulk caused by the presence of the electric cable.
- the design of the passage conduit 28 in a single piece produced by molding is advantageous in that it facilitates the production of the passage conduit 28, so as to limit costs, in that it reduces the risk of leakage of the cooling circuit and in that it increases the thermal conductivity through the conduit 28.
- the losses are minimized thermal damage caused during transfer of heat from the cooling liquid to the engine 2.
- this effect is further accentuated by choosing a suitable material to mold the passage conduit 28, that is to say a material with high thermal conductivity such as for example aluminum.
- the passage conduit 28 makes it possible to pass the coolant from the cooling circuit 6 in a simple and economical manner, so as to improve the operation of the engine during the temperature rise and regeneration phases. particle filter, while optimizing the energy consumption of electronic components such as glow plugs and limiting the space taken up in the engine compartment.
- the invention makes it possible to implement exhaust gas recirculation earlier, to activate an engine charge air cooler more quickly and to increase the engine load in an optimal manner during particle filter regeneration phases.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Description
La présente invention concerne le domaine des circuits de refroidissement pour moteur à combustion interne, en particulier pour des véhicules automobiles.The present invention relates to the field of cooling circuits for internal combustion engines, in particular for motor vehicles.
De manière classique, un véhicule automobile comprenant un moteur à combustion interne est doté d'un circuit de refroidissement destiné à réguler la température du moteur. L'abaissement de la température se fait par le passage d'un liquide de refroidissement dont la circulation est générée par une pompe. Le liquide est conventionnellement appelé eau mais correspond la plupart du temps à un liquide de refroidissement de type eau glycolée.Conventionally, a motor vehicle comprising an internal combustion engine is equipped with a cooling circuit intended to regulate the temperature of the engine. The temperature is lowered by the passage of a cooling liquid whose circulation is generated by a pump. The liquid is conventionally called water but most of the time corresponds to a glycol water type coolant.
Les véhicules automobiles dotés d'un moteur à combustion interne sont confrontés à des exigences sans cesse croissantes visant à limiter la consommation de carburant et les émissions de polluants. À cet effet, de tels véhicules comprennent généralement un conduit de recirculation des gaz d'échappement, également connu sous la dénomination anglo-saxonne « Exhaust Gas Recirculation » ou sous l'abréviation « EGR ». Un tel conduit a pour fonction de prélever des gaz d'échappement en sortie du moteur à combustion interne pour les réinjecter dans un conduit d'admission du moteur. De cette manière, le conduit de recirculation permet de limiter la consommation de carburant et les émissions de polluants.Motor vehicles equipped with an internal combustion engine are faced with ever-increasing demands aimed at limiting fuel consumption and pollutant emissions. For this purpose, such vehicles generally include an exhaust gas recirculation conduit, also known by the Anglo-Saxon name “Exhaust Gas Recirculation” or by the abbreviation “EGR”. The function of such a conduit is to take exhaust gases at the outlet of the internal combustion engine to reinject them into an intake conduit of the engine. In this way, the recirculation duct makes it possible to limit fuel consumption and pollutant emissions.
Cette solution n'apporte toutefois pas pleinement satisfaction. En particulier, au cours d'une phase de démarrage du véhicule, le moteur à combustion interne est généralement froid, de sorte que le conduit de recirculation ne peut pas être ouvert immédiatement. Dans ces conditions, le véhicule consomme davantage de carburant et émet davantage de polluants.However, this solution is not entirely satisfactory. In particular, during a vehicle start-up phase, the internal combustion engine is generally cold, so that the recirculation conduit cannot be opened immediately. Under these conditions, the vehicle consumes more fuel and emits more pollutants.
Pour pallier cet inconvénient, il peut être utilisé des boîtiers comprenant des moyens de chauffage du liquide de refroidissement du circuit de refroidissement du moteur. Le boîtier est connecté à un premier point du circuit de refroidissement par l'intermédiaire d'une première durite et à un second point du circuit de refroidissement par l'intermédiaire d'une seconde durite. De cette manière, le liquide de refroidissement circulant dans le circuit de refroidissement passe par la première durite, est chauffé tandis qu'il traverse le boîtier, puis rejoint le circuit de refroidissement par la seconde durite. Du fait du chauffage du liquide de refroidissement, la recirculation des gaz d'échappement est activée plus rapidement.To overcome this drawback, housings can be used comprising means for heating the coolant of the engine cooling circuit. The box is connected to a first point of the cooling circuit via a first hose and to a second point of the cooling circuit via a second hose. In this way, the coolant circulating in the cooling circuit passes through the first hose, is heated as it passes through the housing, then rejoins the cooling circuit through the second hose. Due to heating of the coolant, exhaust gas recirculation is activated more quickly.
On connaît de
Bien qu'une telle solution soit globalement considérée comme satisfaisante, elle continue de présenter certains inconvénients. En particulier, l'encombrement généré par le boîtier et les deux durites rend pratiquement impossible la mise en place d'un tel boîtier dans un compartiment moteur de véhicule automobile.Although such a solution is generally considered satisfactory, it continues to present certain disadvantages. In particular, the bulk generated by the housing and the two hoses makes it practically impossible to install such a housing in a motor vehicle engine compartment.
Au vu de ce qui précède, l'invention a pour but de fournir un composant de circuit de refroidissement d'un moteur à combustion interne palliant les inconvénients précités.In view of the above, the invention aims to provide a cooling circuit component of an internal combustion engine overcoming the aforementioned drawbacks.
Plus particulièrement, l'invention a pour but de permettre le chauffage du liquide de refroidissement tout en optimisant le rendement d'échange thermique occasionné lors du chauffage, afin de limiter la consommation de carburant et les émissions de polluants, et en limitant l'encombrement généré au sein du compartiment moteur.More particularly, the invention aims to allow the heating of the coolant while optimizing the heat exchange efficiency caused during heating, in order to limit fuel consumption and emissions of pollutants, and by limiting the size generated within the engine compartment.
À cet effet, il est proposé un conduit de passage de liquide de refroidissement pour moteur à combustion interne de véhicule automobile comprenant une portion tubulaire pour permettre le passage d'un liquide de refroidissement d'un circuit de refroidissement du moteur, ladite portion tubulaire comportant une extrémité amont prévue pour être raccordée à un premier organe fonctionnel du moteur, et une extrémité aval opposée à l'extrémité amont et prévue pour être raccordée à un second organe fonctionnel du moteur.For this purpose, there is proposed a coolant passage conduit for an internal combustion engine of a motor vehicle comprising a tubular portion to allow the passage of a coolant from an engine cooling circuit, said tubular portion comprising an upstream end intended to be connected to a first functional member of the engine, and a downstream end opposite the upstream end and intended to be connected to a second functional member of the engine.
Selon une caractéristique générale de ce conduit, la portion tubulaire comprend au moins un orifice de réception apte à recevoir au moins un élément de chauffage du liquide de refroidissement.According to a general characteristic of this conduit, the tubular portion comprises at least one receiving orifice capable of receiving at least one element for heating the cooling liquid.
En outre le conduit de passage comprend une ramification destinée à être raccordée à un aérotherme du circuit de refroidissement. Une telle ramification permet d'amener directement le liquide de refroidissement ayant traversé l'aérotherme de circuler au travers du second organe fonctionnel du moteur.Furthermore, the passage conduit comprises a branch intended to be connected to a unit heater of the cooling circuit. Such a branching makes it possible to directly bring the coolant having passed through the air heater to circulate through the second functional member of the engine.
Un tel conduit de passage permet de chauffer le liquide de refroidissement tout en limitant l'encombrement généré au sein du compartiment moteur. En outre, on chauffe le liquide de refroidissement à proximité du moteur de sorte à permettre une montée en température du moteur plus rapide. On améliore ainsi les conditions de démarrage à froid pour permettre une activation de la recirculation des gaz d'échappement plus rapide. Le conduit de passage chauffant constitue en outre une source de chaleur supplémentaire qui aide à réchauffer un refroidisseur d'air de suralimentation avec anticipation. Il résulte notamment de ces effets un meilleur traitement des polluants et une moindre consommation de carburant.Such a passage conduit makes it possible to heat the coolant while limiting the space generated within the engine compartment. In addition, the coolant is heated near the engine so as to allow the engine to heat up more quickly. This improves the cold starting conditions to enable faster activation of the exhaust gas recirculation. The heated passage duct further provides an additional heat source that helps warm a charge air cooler with anticipation. These effects notably result in better treatment of pollutants and lower fuel consumption.
Selon un mode de réalisation, le premier organe fonctionnel du moteur est un refroidisseur d'huile et/ou le second organe fonctionnel du moteur est un carter-cylindres du moteur ou une pompe de liquide de refroidissement.According to one embodiment, the first functional member of the engine is an oil cooler and/or the second functional member of the engine is an engine cylinder block or a coolant pump.
Le fait de disposer le conduit de passage doté d'un élément de chauffage entre le refroidisseur d'huile et la pompe de liquide de refroidissement, et en particulier juste en amont de la pompe de liquide de refroidissement, permet notamment de faire circuler le liquide de refroidissement chaud dans la pompe à eau, qui est proche du moteur. On réchauffe ainsi davantage les gaz d'échappement pour ouvrir encore plus tôt la vanne de recirculation des gaz d'échappement et réchauffer davantage le refroidisseur d'air de suralimentation.Arranging the passage conduit fitted with a heating element between the oil cooler and the coolant pump, and in particular just upstream of the coolant pump, makes it possible in particular to circulate the liquid hot cooling in the water pump, which is close to the engine. This further heats the exhaust gases to open the exhaust gas recirculation valve even earlier and further heat the charge air cooler.
De manière avantageuse, le conduit de passage est constitué d'une seule pièce réalisée par moulage, de préférence en aluminium.Advantageously, the passage conduit consists of a single piece made by molding, preferably in aluminum.
En réalisant le conduit de passage de cette manière, on réduit les coûts de fabrication du conduit et les coûts d'intégration du circuit de refroidissement au sein du moteur à combustion interne, et on augmente la conductivité thermique du conduit de passage.By producing the passage conduit in this manner, the costs of manufacturing the conduit and the costs of integrating the cooling circuit within the internal combustion engine are reduced, and the thermal conductivity of the passage conduit is increased.
Selon un autre mode de réalisation, le conduit de passage comprend au moins quatre orifices de réception chacun apte à recevoir une bougie de préchauffage.According to another embodiment, the passage conduit comprises at least four receiving orifices each capable of receiving a preheating plug.
Comme cela sera expliqué par la suite, l'utilisation de quatre bougies de préchauffage est notamment avantageuse en ce qu'elle permet d'augmenter suffisamment la charge moteur lors des régénérations du filtre à particules. Les bougies de préchauffage sont également connues sous la dénomination de thermoplongeurs.As will be explained subsequently, the use of four glow plugs is particularly advantageous in that it makes it possible to sufficiently increase the engine load during regeneration of the particle filter. Glow plugs are also known as immersion heaters.
De préférence, lesdits au moins quatre orifices de réception sont disposés en quinconce.Preferably, said at least four receiving orifices are arranged in a staggered manner.
Dans un mode de réalisation avantageux, ledit au moins un orifice de réception comprend un alésage cylindrique de petit diamètre s'étendant vers l'extérieur depuis une paroi interne de la portion tubulaire, et un alésage cylindrique de grand diamètre s'étendant vers l'intérieur depuis une paroi située à l'extérieur de la portion tubulaire, les deux alésages cylindriques étant coaxiaux, les deux alésages cylindriques étant reliés par un alésage tronconique dont les génératrices forment un angle compris entre 58° et 66° avec la direction axiale commune desdits deux alésages cylindriques.In an advantageous embodiment, said at least one receiving orifice comprises a cylindrical bore of small diameter extending outwards from an internal wall of the tubular portion, and a cylindrical bore of large diameter extending towards the interior from a wall located outside the tubular portion, the two cylindrical bores being coaxial, the two cylindrical bores being connected by a frustoconical bore whose generators form an angle of between 58° and 66° with the common axial direction of said two cylindrical bores.
Une telle conception dudit au moins un orifice de réception permet une installation aisée d'une bougie de préchauffage, tout en maintenant une étanchéité renforcée du conduit de passage de liquide de refroidissement.Such a design of said at least one receiving orifice allows easy installation of a preheating plug, while maintaining a reinforced seal of the coolant passage conduit.
Dans un mode de réalisation particulier, le conduit de passage comprend une oreille de fixation à un carter-cylindres du moteur.In a particular embodiment, the passage duct comprises an ear for fixing to a cylinder block of the engine.
Une telle oreille permet d'empêcher la transmission des vibrations du carter-cylindres au conduit de passage.Such an ear makes it possible to prevent the transmission of vibrations from the cylinder block to the passage duct.
Selon un autre aspect, il est proposé un moteur à combustion interne pour véhicule automobile comprenant un carter-cylindres, un circuit de refroidissement, un premier organe fonctionnel, un second organe fonctionnel et un conduit de passage de liquide de refroidissement tel que défini précédemment.According to another aspect, an internal combustion engine for a motor vehicle is proposed comprising a cylinder block, a cooling circuit, a first functional member, a second functional member and a coolant passage conduit as defined above.
Dans un mode de réalisation, le moteur comprend une pompe de liquide de refroidissement délimitée par un carter de pompe, ledit carter de pompe étant au moins partiellement formé par une portion du carter-cylindres.In one embodiment, the engine comprises a coolant pump delimited by a pump housing, said pump housing being at least partially formed by a portion of the cylinder housing.
Un tel mode de réalisation est en particulier avantageux en ce que le liquide de refroidissement chauffé par ledit au moins un élément de chauffage est directement en contact avec le carter-cylindres. En résultat, on minimise les pertes thermiques lors du transfert d'énergie depuis le liquide de refroidissement chauffé vers le moteur à combustion interne. De la sorte, en fournissant un minimum d'énergie, on augmente davantage la montée en température du moteur à combustion interne de sorte à limiter encore la consommation de carburant et les émissions de polluants.Such an embodiment is particularly advantageous in that the coolant heated by said at least one heating element is directly in contact with the cylinder block. As a result, thermal losses are minimized during the transfer of energy from the heated coolant to the internal combustion engine. In this way, by providing a minimum of energy, the temperature rise of the internal combustion engine is further increased so as to further limit fuel consumption and pollutant emissions.
D'autres buts, caractéristiques et avantages de l'invention apparaîtront à la lecture de la description suivante, donnée uniquement à titre d'exemple non limitatif, et faite en référence aux dessins annexés sur lesquels :
- la
figure 1 représente schématiquement un circuit de refroidissement d'un moteur à combustion interne selon un exemple de réalisation de l'invention, - la
figure 2 est une vue isométrique d'un conduit de passage du circuit de refroidissement lafigure 1 , et - la
figure 3 est une vue en coupe d'un orifice de réception du conduit de passage de lafigure 2 .
- there
figure 1 schematically represents a cooling circuit of an internal combustion engine according to an exemplary embodiment of the invention, - there
figure 2 is an isometric view of a passage duct of the cooling circuitfigure 1 , And - there
Figure 3 is a sectional view of a receiving orifice of the passage conduit of thefigure 2 .
On a représenté sur la
Le moteur 2 est associé à un circuit de refroidissement 6. Le circuit de refroidissement 6 a pour fonction de réguler la température du moteur 2.The
Comme cela va être détaillé par la suite, le circuit de refroidissement 6 comporte une pluralité d'organes dont certains coopèrent directement avec le moteur 2. Ces organes sont désignés dans la présente demande comme étant des organes fonctionnels du moteur.As will be detailed below, the cooling circuit 6 comprises a plurality of members, some of which cooperate directly with the
Le circuit de refroidissement 6 comporte une pompe de liquide de refroidissement 8, également connue sous la dénomination de pompe à eau. La pompe 8 a pour fonction d'actionner la circulation du liquide de refroidissement dans le circuit 6 traversant le moteur 2 avant de refroidir ce dernier. La pompe 8 est délimitée par un carter de pompe 10, schématiquement représenté sur la
Comme cela est schématiquement représenté sur la
Le circuit de refroidissement 6 comporte en outre un aérotherme 12. La fonction de l'aérotherme 12 est de permettre le chauffage de l'habitacle du véhicule automobile tout en refroidissant le liquide de refroidissement du circuit 6.The cooling circuit 6 further comprises an
Le circuit 6 comporte en outre un radiateur 14. Le radiateur 14 est prévu afin de refroidir par convection le liquide de refroidissement. A cet effet, le radiateur 14 peut être disposé juste derrière la calandre du véhicule automobile, de sorte à pouvoir refroidir efficacement le liquide de refroidissement circulant dans le circuit 6.Circuit 6 further comprises a
Le circuit 6 comporte en outre un refroidisseur d'huile 16. Le refroidisseur d'huile 16 est utilisé pour réguler la température de l'huile du moteur 2. Le refroidisseur 16 est alors un organe fonctionnel du moteur 2. Par ailleurs, le refroidisseur d'huile 16 est directement fixé sur le carter-cylindres 4 du moteur 2.The circuit 6 further comprises an
Le circuit de refroidissement 6 comporte une pluralité de conduits de passage du liquide de refroidissement entre les organes 8, 12, 14 et 16. En particulier, le circuit 6 comporte une première conduite commune 18 reliant un boîtier de sortie d'eau 17 à un point de bifurcation (non référencé). Au niveau de ce point de bifurcation, la conduite 18 se divise en une première sous-conduite 20 et une seconde sous-conduite 22. La sous-conduite 20 relie le point de bifurcation à l'aérotherme 12. La sous-conduite 22 relie le point de bifurcation au radiateur 14.The cooling circuit 6 comprises a plurality of conduits for passing the coolant between the
Le boîtier de sortie d'eau 17 comprend une ouverture d'entrée communiquant avec le circuit d'eau d'une culasse 5 et une sortie mise en communication fluidique avec la première conduite commune 18.The
Le circuit de refroidissement comporte en outre une deuxième conduite 24 reliant le radiateur 14 au refroidisseur d'huile 16. Le circuit de refroidissement 6 comporte également une troisième conduite 26 raccordée à l'aérotherme 12.The cooling circuit further comprises a
Le sens de circulation du liquide de refroidissement dans les conduites 18 à 26 est schématiquement représenté par la
Le circuit de refroidissement 6 comporte en outre un conduit de passage 28, schématiquement représenté sur la
Dans une variante de réalisation non représentée, le conduit de passage 28 permet un raccordement uniquement du refroidisseur d'huile 16 à la pompe de liquide de refroidissement 8, notamment via une interface du carter-cylindres 4 destiné à recevoir la pompe de liquide de refroidissement 8. Le circuit de refroidissement comprend alors un autre point de piquage pour la conduite 26.In a variant embodiment not shown, the
En référence à la
La portion tubulaire 30 comprend une première extrémité 32 amont et une seconde extrémité 34 aval. Chaque extrémité 32, 34 est dotée d'une bride de butée 36 et d'une gorge annulaire 38.The
L'extrémité amont 32 est configurée pour pouvoir être directement raccordée sur une sortie (non représentée) du refroidisseur d'huile 16. Plus particulièrement, l'extrémité 32 est insérée dans une ouverture cylindrique prévue dans le refroidisseur d'huile 16, de telle sorte que la bride 36 arrive en butée contre une paroi du refroidisseur d'huile 16. Un joint annulaire peut être inséré dans la gorge 38, de sorte à fournir une étanchéité suffisante du raccordement du conduit de passage 28 sur le refroidisseur d'huile 16.The
De même, l'extrémité aval 34 est configurée pour pouvoir être directement raccordée sur une entrée (non représentée) du carter-cylindres 4 lequel peut définir en partie le corps de la pompe de liquide de refroidissement 8. L'extrémité 34 est en l'espèce insérée dans une ouverture cylindrique prévue le carter-cylindres 4, la bride 36 arrivant en butée contre une paroi de la pompe 8, un joint d'étanchéité annulaire étant inséré dans la gorge 38.Likewise, the
Le conduit 28 peut en outre comporter une ramification 40. La ramification 40 est piquée directement sur la portion tubulaire 30 du conduit de passage 28. La ramification 40 comporte une extrémité 42 formant un manchon cylindrique 44 de raccordement avec la conduite 26. Comme les extrémités 32 et 34, l'extrémité 42 comporte une bride de butée 46.The
Grâce aux extrémités 32, 34 et 42, le conduit de passage 28 est directement raccordé au refroidisseur d'huile 16 et au carter-cylindres 4, et indirectement raccordé à l'aérotherme 12 par l'intermédiaire de la conduite 26. De par ces trois raccordements, le conduit de passage 28 est fixé de manière isostatique par rapport au carter-cylindres 4.Thanks to the
Dans l'exemple de réalisation illustré, le conduit de passage 28 comporte en outre une oreille de fixation 48. Bien que, dans l'exemple illustré sur la
L'oreille de fixation 48 est prévue pour permettre une fixation du conduit de passage 28 sur le carter-cylindres 4. L'oreille de fixation 48 permet de fixer le conduit 28 de manière simple, par exemple au moyen d'une vis coopérant avec un alésage fileté correspondant pratiquée dans le carter-cylindres 4. L'oreille de fixation 48 permet d'empêcher la transmission des vibrations du carter-cylindres 4 au conduit de passage 28. Toutefois, on ne sort pas du cadre de l'invention en envisageant un conduit de passage 28 dépourvu d'une telle oreille de fixation.The fixing
Comme cela est représenté sur la
En vue de chauffer efficacement le liquide de refroidissement tout en limitant l'encombrement occasionné, on préférera des bougies de préchauffage alimentées à une puissance électrique selon le besoin. A titre d'exemple, la puissance électrique est comprise entre 250 W et 350 W pour chaque bougie, et encore plus préférentiellement de sensiblement 300 W chacune. En utilisant quatre bougies de préchauffage de ce type, une énergie de l'ordre de 1 200 W doit être fournie aux bougies pour mettre en oeuvre le chauffage du liquide de refroidissement. La présence d'un consommateur électrique ayant besoin de 1 200 W permet de faire augmenter la charge moteur lors des régénérations du filtre à particules. Il en résulte une plus grande efficacité du fonctionnement de ce filtre et donc une diminution des émissions de polluants.In order to efficiently heat the coolant while limiting the space required, we prefer glow plugs powered by electrical power as needed. For example, the electrical power is between 250 W and 350 W for each candle, and even more preferably substantially 300 W each. By using four glow plugs of this type, energy of the order of 1,200 W must be supplied to the plugs to heat the coolant. The presence of an electrical consumer requiring 1,200 W makes it possible to increase the engine load during particle filter regenerations. This results in greater operating efficiency of this filter and therefore a reduction in pollutant emissions.
Les quatre protubérances 50 s'étendent depuis la portion tubulaire 30 sensiblement selon une même direction. Chaque protubérance 50 comprend une paroi frontale 49 opposée à la portion tubulaire 30.The four
En référence à la
Plus particulièrement, l'orifice de réception 52 comprend un premier alésage cylindrique 54 adjacent à la paroi inférieure 51. L'axe de cylindricité de l'alésage 54 coïncide avec l'axe 53. À l'opposé de la paroi intérieure 51, l'alésage 54 se prolonge par un premier alésage tronconique 56. L'axe de cylindricité de l'alésage 56 coïncide également avec l'axe 53. L'alésage tronconique 56 a la forme d'un tronc de cylindre dont les génératrices forment un angle α par rapport à l'axe 53. Dans l'exemple illustré, l'angle α est compris entre 58° et 66°, de manière préférentielle entre 60° et 64° et de manière encore plus préférentielle est sensiblement égal à 60°.More particularly, the receiving
À l'opposé du premier alésage cylindrique 54, l'alésage tronconique 56 se prolonge par un deuxième alésage cylindrique 58. L'axe de cylindricité de l'alésage 58 coïncide avec l'axe 53. L'alésage 58 a un diamètre supérieur à celui de l'alésage 54. En outre, l'alésage 58 comprend un taraudage 59 apte à coopérer avec un filetage correspondant pratiqué sur une paroi cylindrique complémentaire de la bougie de préchauffage. À l'opposé du premier alésage tronconique 56, l'alésage cylindrique 58 se prolonge par un second alésage tronconique 60. L'alésage tronconique 60 forme un tronc de cylindre dont les génératrices forment un angle β avec l'axe 53. Dans l'exemple illustré, l'angle β est sensiblement égal à 45°.Opposite the first
Grâce à cet arrangement de l'orifice de réception 52, une bougie de préchauffage (non représentée) peut être introduite dans les alésages 60, 58, 56 et 54. L'alésage 60 fournit un chanfrein d'entrée de l'orifice 52 afin de faciliter l'insertion de la bougie de préchauffage. De préférence, la bougie de préchauffage présente un épaulement de conception complémentaire à celle de l'alésage tronconique 56. De cette manière, l'épaulement de la bougie de préchauffage vient en butée contre l'alésage tronconique 56. On renforce ainsi l'étanchéité fournie au niveau de l'orifice de réception 52 et de la bougie de préchauffage vis-à-vis du liquide de refroidissement circulant dans le conduit de passage 28. En particulier, l'étanchéité est renforcée grâce à la forme optimale de l'alésage 56 et à la valeur de l'angle α formé par ses génératrices. En outre, grâce au filetage pratiqué sur l'alésage 58, on fixe de manière simple et fiable la bougie de préchauffage dans l'orifice de réception 52.Thanks to this arrangement of the receiving
Ainsi, dans l'exemple illustré, les orifices de réception 52 s'étendent entre la paroi interne 51 du conduit 28 et la paroi frontale 49 des protubérances 50. Cet arrangement est notamment avantageux en ce qu'il permet une installation fiable et étanche des bougies de préchauffage. On ne sort toutefois pas du cadre de l'invention en envisageant des orifices de réception différents, par exemple s'étendant entre la paroi interne 51 et une paroi externe (non référencée) de la portion tubulaire 30. Dans une telle variante, l'épaisseur de la portion tubulaire 30 doit être plus importante si l'on souhaite obtenir une installation fiable et étanche. Le mode de réalisation illustré sur les figures, comprenant notamment les orifices 52 partiellement situés dans les protubérances locales 50, permet ainsi d'économiser de la matière et de limiter l'encombrement et la masse du conduit de passage 28.Thus, in the example illustrated, the
De nouveau en référence à la
Par ailleurs, la conception du conduit de passage 28 en une seule pièce réalisée par moulage est avantageuse en ce qu'elle facilite la réalisation du conduit de passage 28, de sorte à limiter les coûts, en ce qu'elle réduit les risques de fuite du circuit de refroidissement et en ce qu'elle augmente la conductivité thermique au travers du conduit 28. De la sorte, lorsque le liquide de refroidissement du circuit 6 est réchauffé lors de la phase de montée en température du moteur 2, on minimise les pertes thermiques occasionnées lors du transfert de chaleur depuis le liquide de refroidissement vers le moteur 2. Dans l'exemple illustré, on accentue encore cet effet en choisissant un matériau approprié pour réaliser par moulage le conduit de passage 28, c'est-à-dire un matériau à forte conductivité thermique comme par exemple de l'aluminium.Furthermore, the design of the
Au vu de ce qui précède, le conduit de passage 28 permet de faire transiter le liquide de refroidissement du circuit de refroidissement 6 de manière simple et économique, de sorte à améliorer le fonctionnement du moteur lors des phases de montée en température et de régénération du filtre à particules, tout en optimisant la consommation énergétique des composants électroniques tels que des bougies de préchauffage et en limitant l'encombrement occasionné au niveau du compartiment moteur.In view of the above, the
En particulier, l'invention permet de mettre en oeuvre plus tôt une recirculation des gaz d'échappement, d'activer plus rapidement un refroidisseur d'air de suralimentation du moteur et d'augmenter la charge du moteur d'une manière optimale pendant les phases de régénération du filtre à particules.In particular, the invention makes it possible to implement exhaust gas recirculation earlier, to activate an engine charge air cooler more quickly and to increase the engine load in an optimal manner during particle filter regeneration phases.
Claims (7)
- Cooling circuit (6) for an engine (2), comprising functional members, with in particular a first functional member of the engine being an oil cooler (16) and a second functional member of the engine being a liquid coolant pump (8), the liquid coolant pump (8) being arranged upstream of the engine (2) in the direction of flow of the liquid coolant in the cooling circuit (6), the cooling circuit comprising in particular a unit heater (12), a radiator (14) and also a plurality of ducts (18, 20, 22, 24, 26) for passage of the liquid coolant between functional members, one of the ducts being a liquid coolant passage duct (28) for a motor vehicle internal combustion engine (2), which connects the oil cooler (16) to the liquid coolant pump (8), the duct (28) comprising a tubular portion (30), said tubular portion (30) having an upstream end (32) intended to be connected to a first functional member of the engine (2), in particular the oil cooler (16), and a downstream end (34) opposite the upstream end (32) and intended to be connected to a second functional member of the engine (2), in particular the liquid coolant pump (8), the tubular portion (30) comprising at least one receiving orifice (52) capable of receiving at least one element for heating the liquid coolant, and said passage duct (28) comprising a branch (40) connected to the duct (26) emanating from the unit heater (12).
- Cooling circuit (6) according to Claim 1, characterized in that it is formed in one piece produced by casting, preferably being made of aluminium.
- Cooling circuit (6) according to Claim 1 or 2, wherein the passage duct (28) comprises at least four receiving orifices (52) each capable of receiving a preheating plug.
- Cooling circuit (6) according to Claim 3, wherein said at least four receiving orifices (52) are arranged in staggered fashion.
- Cooling circuit (6) according to any one of Claims 1 to 4, wherein said at least one receiving orifice (52) comprises a small-diameter cylindrical bore (54) extending outwardly from an inner wall (51) of the tubular portion (30), and a large-diameter cylindrical bore (58) extending inwardly from a wall (49) situated outside the tubular portion (30), the two cylindrical bores (54, 58) being coaxial, the two cylindrical bores (54, 58) being connected by a frustoconical bore (56) whose generatrices form an angle (α) of between 58° and 66° with the axial direction (53) of said two cylindrical bores (54, 58).
- Cooling circuit (6) according to any one of Claims 1 to 5, wherein the passage duct (28) comprises a fastening lug (48) for fastening to a crankcase (4) of the engine, the fastening lug extending in particular from the branch (40).
- Cooling circuit (6) according to any one of the preceding claims, characterized in that the liquid coolant pump (8) is delimited by a pump casing (10), said pump casing (10) being at least partially formed by a portion of a crankcase (4) of the engine (2).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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FR1662596A FR3060666B1 (en) | 2016-12-16 | 2016-12-16 | COOLANT FLOW PIPE FOR INTERNAL COMBUSTION ENGINE OF MOTOR VEHICLE |
PCT/EP2017/082390 WO2018108887A1 (en) | 2016-12-16 | 2017-12-12 | Duct for the passage of liquid coolant for an internal combustion engine of a motor vehicle |
Publications (2)
Publication Number | Publication Date |
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EP3555457A1 EP3555457A1 (en) | 2019-10-23 |
EP3555457B1 true EP3555457B1 (en) | 2023-10-25 |
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EP17825423.1A Active EP3555457B1 (en) | 2016-12-16 | 2017-12-12 | Duct for the passage of liquid coolant for an internal combustion engine of a motor vehicle |
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EP (1) | EP3555457B1 (en) |
ES (1) | ES2968435T3 (en) |
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FR3096404B1 (en) * | 2019-05-24 | 2021-04-23 | Renault Sas | Device for regulating the temperature of at least one element of a supercharged heat engine |
DE102019219056A1 (en) * | 2019-12-06 | 2021-06-10 | Volkswagen Aktiengesellschaft | Cooling circuit arrangement of a motor vehicle |
FR3132936B1 (en) * | 2022-02-18 | 2024-01-19 | Renault Sas | Process for manufacturing a circuit for an automobile |
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FR2722839B1 (en) * | 1994-07-21 | 1996-11-15 | Harang Alain Michel | DEVICE FOR PUTTING AN INTERNAL COMBUSTION ENGINE TO A TEMPERATURE COMPATIBLE WITH INTENSIVE OPERATION |
FR2763361B1 (en) * | 1997-05-15 | 1999-08-20 | Europalu | COOLANT PREHEATING BLOCK FOR AN ENGINE VEHICLE |
EP1008472B1 (en) * | 1998-12-10 | 2002-09-11 | Ford-Werke Aktiengesellschaft | Method for producing a supplementary glow plug heating element for motor vehicles |
JP4068309B2 (en) * | 2001-03-02 | 2008-03-26 | 日本特殊陶業株式会社 | Heater and manufacturing method thereof |
US8933372B2 (en) * | 2006-06-29 | 2015-01-13 | Dynacurrent Technologies, Inc. | Engine pre-heater system |
CA2857765C (en) * | 2014-07-24 | 2023-09-26 | Ray King | Auxiliary heating system |
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2016
- 2016-12-16 FR FR1662596A patent/FR3060666B1/en active Active
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2017
- 2017-12-12 EP EP17825423.1A patent/EP3555457B1/en active Active
- 2017-12-12 ES ES17825423T patent/ES2968435T3/en active Active
- 2017-12-12 WO PCT/EP2017/082390 patent/WO2018108887A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
EP3555457A1 (en) | 2019-10-23 |
WO2018108887A1 (en) | 2018-06-21 |
ES2968435T3 (en) | 2024-05-09 |
FR3060666A1 (en) | 2018-06-22 |
FR3060666B1 (en) | 2019-08-02 |
ES2968435T8 (en) | 2024-05-29 |
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