EP3414438B1 - Charged air supply device of an internal combustion engine - Google Patents

Charged air supply device of an internal combustion engine Download PDF

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Publication number
EP3414438B1
EP3414438B1 EP17707383.0A EP17707383A EP3414438B1 EP 3414438 B1 EP3414438 B1 EP 3414438B1 EP 17707383 A EP17707383 A EP 17707383A EP 3414438 B1 EP3414438 B1 EP 3414438B1
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EP
European Patent Office
Prior art keywords
air
cooling circuit
value
compressor
supercharging device
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.)
Active
Application number
EP17707383.0A
Other languages
German (de)
French (fr)
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EP3414438A1 (en
Inventor
Francois Plante
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Renault SAS
Nissan Motor Co Ltd
Original Assignee
Renault SAS
Nissan Motor Co Ltd
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Publication date
Application filed by Renault SAS, Nissan Motor Co Ltd filed Critical Renault SAS
Publication of EP3414438A1 publication Critical patent/EP3414438A1/en
Application granted granted Critical
Publication of EP3414438B1 publication Critical patent/EP3414438B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
    • F02B39/005—Cooling of pump drives
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/08—Cooling; Heating; Heat-insulation
    • F01D25/12—Cooling
    • 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
    • F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
    • F01P5/04—Pump-driving arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
    • F02B39/02—Drives of pumps; Varying pump drive gear ratio
    • F02B39/08—Non-mechanical drives, e.g. fluid drives having variable gear ratio
    • F02B39/10—Non-mechanical drives, e.g. fluid drives having variable gear ratio electric
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08—Centrifugal pumps
    • F04D17/10—Centrifugal pumps for compressing or evacuating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/5806—Cooling the drive system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/5813—Cooling the control unit
    • 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
    • F01P2060/12—Turbo charger

Definitions

  • turbochargers in which a compressor is driven by a turbine driven by the speed of the engine exhaust gas.
  • the efficiency of a turbocharger is related to the speed of the engine exhaust gas, which implies that the supercharging is not optimal when the engine is running at low speed. This can be troublesome especially when a high power of the engine is required at low speed, because it is not possible to quickly increase the engine torque.
  • Such an electric compressor comprises an electric machine formed of a stator and a rotor, installed in a housing, the rotor being secured to a compressor wheel by a shaft passing through the housing.
  • the electric compressor is then decoupled from the engine speed and can adapt to the engine's supercharging needs, in particular to produce faster power.
  • the motor vehicle when the motor vehicle is sized so that the electric compressor provides the majority of the air intake for the engine supercharging, for example in the absence of a turbocharger, or when the vehicle operates essentially at low speed for example during a city traffic, it may happen that the electric compressor is brought to operate uninterrupted or briefly interrupted, during long periods of time, which can cause significant heating of the electric machine.
  • stator circuits of the machine heat by Joule effect, which can cause significant damage and potentially irreversible on this machine.
  • a known problem is to find a solution to allow an electric compressor of a motor vehicle to operate over long periods of time, while ensuring that it does not suffer irreversible damage.
  • an air supercharging circuit comprises an air inlet which conducts an outside air flow to the compressor inlet.
  • the documents DE 101 56 704 A1 , DE 100 40 508 A1 and EP 1 348 848 A2 describe overfeeding devices with features similar to those of the document US 2003/0051475 A1 .
  • the compressed air leaving the compressor is led at the inlet of a heat exchanger, known as the charge air cooler, or under the English name of intercooler, to be cooled, and compressed air cooled is then led to the intake manifold.
  • a heat exchanger known as the charge air cooler, or under the English name of intercooler
  • the air circuit also comprises a first air supply duct opening at one end at the outlet of the heat exchanger and at another end inside the casing of the electric machine.
  • the air circuit also comprises a second conduit opening at one end inside the housing of the electric machine and at the other end in the vicinity of the air inlet of the compressor.
  • an air-boosting device of an internal combustion engine comprising an air inlet, an electric compressor driven by a suitable control device, for compressing the air coming from the air inlet and an exchanger thermal device for cooling compressed air from the compressor, the cooled compressed air flowing to an intake manifold of the internal combustion engine, said supercharging device comprising a cooling circuit of the electric compressor and / or the control device , the cooling circuit comprising an air supply duct to the electric compressor and / or the control device, extending between the outlet of the heat exchanger and the electric compressor and / or the control device, so as to ability to capture cooled compressed air, the cooling circuit further comprising an air recirculation duct extending between the electric compressor and / or the e control device and the vicinity of the input of the intake manifold.
  • the pressure gradient at the ends of the cooling circuit, for circulating the air in the cooling circuit is a function of the acceleration of the air as it flows between the outlet of the heat exchanger and the inlet of the intake manifold.
  • the cooling circuit allows the circulation of a cooled compressed air flow to cool the electric compressor, even when the operating speed of the engine is low.
  • Such a device has the advantage of slaving the flow rate in the cooling circuit to the control current of the compressor, which defines the speed of rotation of the compressor wheel. Indeed, the higher the current, the higher the pressure at the outlet of the heat exchanger will be high and therefore the higher the air flow in the cooling circuit will be important. Also, such The device performs an implicit servocontrol of the air flow in the cooling circuit, which makes it possible to reduce the cost of integration and development since it does not necessarily require external servocontrol.
  • the electric compressor comprises an electric machine installed in a housing and the cooling circuit comprises at least a portion of the interior of the housing.
  • the components of the electrical machine in particular the power electronics components installed in the housing, the stator and the rotor of the electric machine, can be cooled simply and efficiently.
  • control device comprises a housing in which at least one power electronics is arranged, the cooling circuit comprising at least a part of the inside of the housing.
  • the recirculation duct opens in the vicinity of the inlet of the intake manifold so as to form a junction orthogonal to the direction of the cooled compressed air flow in the vicinity of said junction.
  • the cooling device further comprises means for controlling the amount of cooled compressed air allowed to circulate in said cooling circuit.
  • means for controlling the amount of air circulating in the cooling circuit independently of the passive circulation conditions, such as the pressure gradient at the ends of the cooling circuit.
  • said control means comprises a solenoid valve.
  • the solenoid valve is disposed in the cooling circuit in the vicinity of the outlet of the heat exchanger. This allows efficient and effective mounting of the control means.
  • the electric compressor comprises means for generating a forced air flow through the cooling circuit, said means for generating a forced air flow being, for example, fins disposed on the rotor, said fins being able to material from the rotor according to a particular winding of the latter.
  • closure of the control means can be effectively controlled to maximize the availability of air for supercharging the internal combustion engine.
  • control method comprises a step of determining a pressure gradient value associated with the cooling circuit, for example as a function of the pressure difference between the vicinity of the outlet of the heat exchanger and the pressure at the pressure. junction in the vicinity of the entrance of the intake manifold, the control of the means of control being furthermore a function of a closure command determined so that, when the determined pressure gradient value is lower than a predetermined threshold value, the control means at least partially prevents the circulation of cooled compressed air in the cooling circuit.
  • a pressure gradient value associated with the cooling circuit for example as a function of the pressure difference between the vicinity of the outlet of the heat exchanger and the pressure at the pressure. junction in the vicinity of the entrance of the intake manifold, the control of the means of control being furthermore a function of a closure command determined so that, when the determined pressure gradient value is lower than a predetermined threshold value, the control means at least partially prevents the circulation of cooled compressed air in the cooling circuit.
  • the invention relates to a supercharging assembly comprising a supercharging device as described above and a controller adapted to implement the control method.
  • the control member may for example be an onboard computer, a microprocessor, or for example the control unit of the electric compressor.
  • the invention further relates to a motor vehicle comprising a supercharging device as described above.
  • an air supercharging device 1 of an internal combustion engine 2 comprises an air inlet 5 and a compressor 6.
  • the supercharging device 1 and the engine 2 are installed in a motor vehicle.
  • the invention is not limited solely to motor vehicles, and relates to any supercharging device installation 1 for an internal combustion engine 2.
  • the compressor 6 receives the air coming from the air inlet 5 after passing through an air filter 7.
  • the air filter 7 makes it possible to filter the solid particles that can be conveyed by the air and that could be damage the compressor 6.
  • the air entering through the air inlet 5 generally comes from outside the assembly in which the supercharging device 1 and the engine 2 are installed, for example from the outside of a motor vehicle. This air is therefore generally at atmospheric pressure and at ambient temperature.
  • the compressor 6 is here an electric compressor 6 which comprises an electric machine 8 installed in a housing 11 and formed of a stator 10 and a rotor 9.
  • the compressor 6 may be a turbocharger assisted by an electric machine, the electric machine then replacing the turbine of the turbocharger to drive the compression wheel, when the engine runs at low speed.
  • the implementation of this alternative is then simply adaptable to cool the electric machine.
  • the rotor 9 is installed in the stator 10 so as to be rotated by the electromagnetic field produced by the stator 10.
  • a shaft 12 is secured to a first end of the rotor 9, and passes through the housing 11 so as to be secured at another end to a compressor wheel 13.
  • the rotor 9 rotates the shaft 12 which in turn drives the compressor wheel 13.
  • the compressor 6 is controlled by an onboard control unit 20.
  • the on-board control unit 20 receives a power demand value from the engine 2, for example as a function of the force produced by the user of the motor vehicle on the accelerator pedal 21, or the position that the user gives to said accelerator pedal 21.
  • the on-board control unit 20 calculates the necessary torque to quickly obtain the requested power.
  • the on-board control unit actuates the compressor 6 so that it provides the engine 2 a sufficient rate of supercharged air to increase the torque produced.
  • the compressed air which has been heated during its compression, is led to a heat exchanger 14, here a charge air cooler 14, also known as the English intercooler, for cooling the compressed air .
  • the cooled compressed air exiting the heat exchanger 14 flows to the intake manifold 3 of the engine 2 so that it can be injected into the cylinders of the engine 2.
  • the supercharging device 1 also comprises a cooling circuit 41, 42 of the compressor 6.
  • the cooling circuit 41, 42 is formed of an air supply duct 41 and an air recirculation duct 42.
  • the cooling circuit 41, 42 therefore constitutes a parallel circuit 41, 42 to the main supercharging circuit 44 previously described.
  • the ducts of the cooling circuit 41, 42 may be fixed to the main circuit 44 by threading, by press fitting on rigid or straight ducts, for example provided with bulges, or else locked by collars.
  • the ducts of the cooling circuit 41, 42 may be made of any suitable material, for example silicone rubber, fabricated, for example with wire mesh, Teflon, nylon.
  • each duct of the cooling circuit can be made from at least one material or a combinatorial of materials that is able to thermally isolate the flow of cooled air circulating in the ducts of the environment. high temperature that is the engine compartment. This is to maintain a constant airflow temperature for cooling the compressor.
  • the air supply duct 41 is adapted to supply fresh air capable of cooling the electric machine of the compressor 6.
  • the air supply duct 41 extends between the outlet 47 of the heat exchanger 14 and the compressor 6.
  • the air supply duct 41 enters the casing 11 of the electrical machine 8 so as to put the air opening into the casing 11 in contact in particular with the stator 10, the rotor 9, but also the housing where find the power electronics components of the control device that manage the power introduced into the stator or the rotor according to the design technology of the electric machine, in order to cool them by heat exchange.
  • control device comprising the power electronics is remote from the electrical machine, for example according to an arrangement of the power devices in a dedicated housing and separated from the housing 11, the cooling circuit 41, 42 integrates said housing in that the latter defines a portion of the flow duct cooling air.
  • An air recirculation duct 42 is installed, which extends between the interior of the casing 11 of the electrical machine 8 and the vicinity of the inlet 45 of the intake manifold 3.
  • the recirculation duct 42 opens at a junction point 48, in the main circuit 44, orthogonal to the direction of the flow of air flowing in the main circuit 44 at the junction point 48 with the recirculation duct 42.
  • This junction point 48 will be chosen so that the air circulating in the main circuit 44 at this junction point 48 has a substantially maximum speed.
  • junction point 48 will be chosen so that it is as far as possible from the outlet 47 of the heat exchanger 14, and therefore as close as possible to the intake manifold 3.
  • the recirculation duct 42 firstly makes it possible to reintroduce the air used to cool the electrical machine 8 upstream of the intake manifold 3, which makes it possible to preserve the overall air flow at the inlet of the collector. admission 3.
  • the housing 11 forming from a general point of view, a substantially airtight envelope, the pressure gradient between the vicinity of the inlet manifold 45 inlet 3 and the outlet 47 of the exchanger 14 provides a vacuum circulating the air in the cooling circuit 41,42 from the outlet 47 of the heat exchanger 14 to the vicinity of the inlet manifold 45 inlet 3 so as to create a flow of air cooling the interior of the casing 11 of the electric machine 8.
  • the accelerated air in the vicinity of the inlet of the intake manifold 3 has a lower pressure than the slower air in the vicinity of the outlet 47 of the heat exchanger 14, such as so that the air can be sucked into the cooling circuit 41,42 parallel.
  • the acceleration of the air can be produced by the particular shape of the intake manifold 3 or the main circuit 44, however if the air is not naturally accelerated in the main circuit portion 44 between the outlet 47 of the heat exchanger 14 and the vicinity of inlet 45 of intake manifold 3, a venturi device may be installed between heat exchanger 14 and inlet of intake manifold 3, in main circuit 44, so forcing the acceleration of the air, and creating a pressure gradient favorable to the circulation of air in the cooling circuit 41,42.
  • the supercharging device comprises, at the level of the electric compressor 6, means for generating a forced air flow through the cooling circuit 41, 42.
  • said means for generating a forced air flow may be fins disposed at the periphery of the rotor. According to an alternative embodiment of these fins, they may be of rotor material according to a particular winding of the latter.
  • the rotation of the rotor causes the wings to move, which forces the air to circulate in the ducts of the cooling circuit 41, 42.
  • the cooling circuit 41,42 comprises a control means 60 of the air flow.
  • the control means 60 is here a solenoid valve 60 installed in the vicinity of the end of the air supply duct 41 opening out in the vicinity of the outlet 47 of the heat exchanger 14.
  • control means 60 may comprise a membrane or a needle, installed in the cooling circuit 41, 42 in the vicinity of the electrical machine 8, and sealingly closing the cooling circuit 41, 42.
  • the needle or the membrane is mechanically connected to a spring bearing on the air intake circuit 41, the expansion of which increases the length, so that it exerts a force that moves the membrane or the needle, thus clear a passageway to said fluid.
  • the dimensioning of the spring is made so that the circuit is open when the temperature of the electric compressor 6 having led to the expansion of the spring, corresponds to a threshold T1 for triggering the cooling.
  • the solenoid valve 60 can be controlled by an independent control member 20 or directly by the on-board control unit 20 controlling the compressor 6.
  • the solenoid valve 60 is adapted to pass from an open position in which the air is free to pass in the cooling circuit 41, 42 to a closed position preventing the passage of air in the cooling circuit 41, 42.
  • the solenoid valve 60 is further adapted to take several positions intermediates modulating the allowable air flow in the cooling circuit 41,42.
  • the solenoid valve can be positioned in a closed position. In this way no pressure drop is produced at the main circuit 44 air supercharging, and the operation of the motor 2 is, in this respect, optimal.
  • a method of controlling the solenoid valve 60, implemented by the control member 20, comprises a first step in which 100 is received for each instant t a value representative of the temperature Tce of the electric machine 8 of the compressor 6, to which will be referred, for more legibility, as being the Tce temperature of the electric machine 8.
  • the temperature Tce of the electrical machine 8 can be provided by a temperature sensor installed in the housing 11 of the machine 8.
  • the temperature Tce of the electrical machine 8 can be obtained by a calculation means, for example a microprocessor, adapted to calculate, as a function of the engine speed, the compressor operation and any other suitable parameter, an estimated value and / or predictive for the following instants, the Tce temperature of the electric machine 8.
  • a calculation means for example a microprocessor, adapted to calculate, as a function of the engine speed, the compressor operation and any other suitable parameter, an estimated value and / or predictive for the following instants, the Tce temperature of the electric machine 8.
  • a calculation means for example a microprocessor, can implement a heat dissipation model adapted to predict heating of the electric machine, in order to anticipate the regulation of the opening of the solenoid valve 60, for optimize temperature control Tce in the housing 11 of the electrical machine 8
  • the temperature Tce of the electrical machine 8 is then compared with an upper limit temperature T1, called the activation temperature T1, for example an activation temperature T1 between 60 ° C. and 150 ° C.
  • the heat exchanger 14 may be a water / air type exchanger, in that the cooling water circuit is a cooling circuit said to be at a low temperature, the water temperature not exceeding 60 ° C. preferably at 50.degree. C., compared with a so-called high temperature cooling circuit, such as the cooling circuit of the engine, the cooling fluid of which approaches a temperature of between 90.degree. C. and 120.degree.
  • the heat exchanger 14 may be of the air / air type, disposed on the front of the vehicle to draw the frigories of air to cool the compressed air.
  • the temperature value of the electrical machine 8 is compared with a deactivation value T2, for example a temperature value of between 40 ° C. and 80 ° C. C.
  • the deactivation value T2 is lower than the activation value T1 so as to ensure sufficient cooling of the electrical machine 8.
  • each activation temperature value T1 defining an intermediate opening position different from the solenoid valve 60, so that each activation value T1 allows a flow rate circulation corresponding to a different fraction of the maximum possible flow in the cooling circuit 41,42, when the solenoid valve 60 is in the fully open position. Also, the higher the activation temperature value T1, the greater the opening of the solenoid valve 60 is important.
  • the pressure gradient at the ends of the cooling circuit 41, 42 is calculated, for example as a function of the measured or estimated pressure values, in the vicinity of the outlet 47 of the heat exchanger 14, of the pressure at the junction 48 in the vicinity of the inlet 45 inlet of the intake manifold 3, and the length of the main circuit 44.
  • the calculated gradient has a value between of the order of 10 and 300 mbar, it controls a partial closure of the control means 60, here the solenoid valve, to create a pressure drop, so that by Venturi effect, the air flow in the main circuit 44 in the vicinity of the inlet 45 of the intake manifold 3 produces a suction of air in the cooling circuit 41,42.
  • the control means 60 here the solenoid valve
  • the air supercharging device of an internal combustion engine may also include a conventional compressor in addition to the electric compressor 6, each preferably operating at different points of load of the engine to internal combustion 2.
  • the air supply duct cooled the electric compressor 6 is preferably a stitching made close to the exchanger 14, or even according to one embodiment, directly included in the outlet manifold of the exchanger 14 which then comprises a main air outlet 47 and a secondary outlet through which the cooling air can pass in the direction of the electric compressor 6 or the control device to be cooled.
  • the means of controlling the air flow rate including the valve 60 can be directly integrated in the exchanger 14, for example by molding an outlet manifold.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Supercharger (AREA)

Description

Dans le domaine des véhicules automobiles à moteur à combustion interne, il est connu de procéder à une suralimentation en air du moteur afin d'en augmenter le rendement, en procédant à une compression de l'air en amont de l'admission.In the field of motor vehicles with internal combustion engine, it is known to supercharge the engine air to increase the efficiency, by compressing the air upstream of the intake.

A cet effet, on connait notamment l'emploi de turbocompresseurs, dans lesquels un compresseur est entrainé par une turbine animée par la vitesse des gaz d'échappement du moteur.For this purpose, we know in particular the use of turbochargers, in which a compressor is driven by a turbine driven by the speed of the engine exhaust gas.

Cependant, le rendement d'un turbocompresseur est lié à la vitesse des gaz d'échappement du moteur, ce qui implique que la suralimentation n'est pas optimale lorsque le moteur tourne à faible régime. Ceci peut être gênant notamment lorsqu'une forte puissance du moteur est demandée à faible régime, car il n'est alors pas possible d'augmenter rapidement le couple moteur.However, the efficiency of a turbocharger is related to the speed of the engine exhaust gas, which implies that the supercharging is not optimal when the engine is running at low speed. This can be troublesome especially when a high power of the engine is required at low speed, because it is not possible to quickly increase the engine torque.

Aussi, il est aussi connu d'installer, en présence ou non d'un turbocompresseur, un compresseur électrique pour permettre une suralimentation en air, et donc une augmentation du couple produit par le moteur, notamment à bas régime.Also, it is also known to install, with or without a turbocharger, an electric compressor to allow air supercharging, and therefore an increase in the torque produced by the engine, especially at low speed.

Un tel compresseur électrique comprend une machine électrique formée d'un stator et d'un rotor, installée dans un carter, le rotor étant solidarisé à une roue de compresseur par un arbre traversant le carter. Le compresseur électrique est alors découplé du régime moteur et peut s'adapter aux besoins en suralimentation du moteur, notamment pour produire rapidement plus de puissance.Such an electric compressor comprises an electric machine formed of a stator and a rotor, installed in a housing, the rotor being secured to a compressor wheel by a shaft passing through the housing. The electric compressor is then decoupled from the engine speed and can adapt to the engine's supercharging needs, in particular to produce faster power.

Or, lorsque le véhicule automobile est dimensionné de telle sorte que le compresseur électrique fournit la majorité de l'apport en air pour la suralimentation du moteur, par exemple en l'absence d'un turbocompresseur, où lorsque le véhicule fonctionne essentiellement à bas régime, par exemple lors d'une circulation en ville, il peut arriver que le compresseur électrique soit amené à fonctionner de manière ininterrompue, ou brièvement interrompue, pendant d'importantes périodes de temps, ce qui peut provoquer un échauffement important de la machine électrique.However, when the motor vehicle is sized so that the electric compressor provides the majority of the air intake for the engine supercharging, for example in the absence of a turbocharger, or when the vehicle operates essentially at low speed for example during a city traffic, it may happen that the electric compressor is brought to operate uninterrupted or briefly interrupted, during long periods of time, which can cause significant heating of the electric machine.

En effet, lorsque la machine est utilisée sur une longue période de temps, les circuits statoriques de la machine chauffent par effet Joule, ce qui peut provoquer des dégâts importants et potentiellement irréversibles sur cette machine.Indeed, when the machine is used over a long period of time, the stator circuits of the machine heat by Joule effect, which can cause significant damage and potentially irreversible on this machine.

Aussi, un problème connu est de trouver une solution pour permettre à un compresseur électrique d'un véhicule automobile de fonctionner sur de longues périodes de temps, tout en s'assurant qu'il ne subisse pas de dégât irréversible.Also, a known problem is to find a solution to allow an electric compressor of a motor vehicle to operate over long periods of time, while ensuring that it does not suffer irreversible damage.

On connait notamment du document US 2003/0051475 , un circuit de refroidissement pour un turbocompresseur assisté par une machine électrique.We know in particular of the document US 2003/0051475 , a cooling circuit for a turbocharger assisted by an electric machine.

Dans ce document de l'art antérieur, un circuit de suralimentation en air comprend une entrée d'air qui conduit un flux d'air extérieur vers l'entrée du compresseur. Les documents DE 101 56 704 A1 , DE 100 40 508 A1 et EP 1 348 848 A2 décrient des dispositifs de suralimentation avec des caractéristiques similaires à ces du document US 2003/0051475 A1 .In this document of the prior art, an air supercharging circuit comprises an air inlet which conducts an outside air flow to the compressor inlet. The documents DE 101 56 704 A1 , DE 100 40 508 A1 and EP 1 348 848 A2 describe overfeeding devices with features similar to those of the document US 2003/0051475 A1 .

L'air comprimé sortant du compresseur, est conduit en entrée d'un échangeur thermique, connu sous le nom de refroidisseur d'air de suralimentation, ou sous le nom anglophone de intercooler, afin d'être refroidi, et l'air comprimé refroidi est ensuite conduit vers le collecteur d'admission.The compressed air leaving the compressor, is led at the inlet of a heat exchanger, known as the charge air cooler, or under the English name of intercooler, to be cooled, and compressed air cooled is then led to the intake manifold.

Le circuit d'air comprend aussi un premier conduit d'apport d'air débouchant à une extrémité en sortie de l'échangeur thermique et à une autre extrémité à l'intérieur du carter de la machine électrique.The air circuit also comprises a first air supply duct opening at one end at the outlet of the heat exchanger and at another end inside the casing of the electric machine.

Le circuit d'air comprend aussi un deuxième conduit débouchant à une extrémité à l'intérieur du carter de la machine électrique et à l'autre extrémité au voisinage de l'entrée d'air du compresseur.The air circuit also comprises a second conduit opening at one end inside the housing of the electric machine and at the other end in the vicinity of the air inlet of the compressor.

Aussi, par l'effet du gradient de pression entre l'entrée d'air du compresseur et la sortie de l'échangeur thermique, un flux d'air comprimé frais est aspiré dans le premier conduit de dérivation, traverse le carter de la machine électrique et est aspiré par le deuxième conduit de manière à être réintroduit en entrée du collecteur.Also, by the effect of the pressure gradient between the air inlet of the compressor and the outlet of the heat exchanger, a flow of fresh compressed air is sucked into the first bypass duct, passes through the casing of the machine electrical and is sucked by the second conduit so as to be reintroduced into the collector input.

La pression en sortie de l'échangeur thermique étant fortement dépendante du fonctionnement de l'admission d'air et donc du régime moteur, une telle solution n'est pas optimale et est peu adaptée pour un fonctionnement dans un circuit comprenant un compresseur électrique fortement sollicité, quelque soit le régime de fonctionnement du moteur.The pressure at the outlet of the heat exchanger being highly dependent on the operation of the air intake and therefore the engine speed, such a solution is not optimal and is unsuitable for operation in a circuit comprising a highly stressed electric compressor, whatever the operating speed of the engine.

Aussi, il existe un besoin pour un dispositif de refroidissement plus adapté pour refroidir un compresseur électrique destiné à suralimenter en air un moteur à combustion interne.Also, there is a need for a cooling device more suitable for cooling an electric compressor for supercharging air an internal combustion engine.

On propose un dispositif de suralimentation en air d'un moteur à combustion interne, comprenant une entrée d'air, un compresseur électrique piloté par un dispositif de commande approprié, pour comprimer l'air provenant de l'entrée d'air et un échangeur thermique pour refroidir l'air comprimé issu du compresseur, l'air comprimé refroidi s'écoulant vers un collecteur d'admission du moteur à combustion interne, ledit dispositif de suralimentation comprenant un circuit de refroidissement du compresseur électrique et/ou du dispositif de commande, le circuit de refroidissement comportant un conduit d'apport en air au compresseur électrique et/ou au dispositif de commande, s'étendant entre la sortie de l'échangeur thermique et le compresseur électrique et/ou le dispositif de commande, de sorte à pouvoir capter de l'air comprimé refroidi, le circuit de refroidissement comprenant en outre un conduit de recirculation de l'air s'étendant entre le compresseur électrique et/ou le dispositif de commande et le voisinage de l'entrée du collecteur d'admission.There is provided an air-boosting device of an internal combustion engine, comprising an air inlet, an electric compressor driven by a suitable control device, for compressing the air coming from the air inlet and an exchanger thermal device for cooling compressed air from the compressor, the cooled compressed air flowing to an intake manifold of the internal combustion engine, said supercharging device comprising a cooling circuit of the electric compressor and / or the control device , the cooling circuit comprising an air supply duct to the electric compressor and / or the control device, extending between the outlet of the heat exchanger and the electric compressor and / or the control device, so as to ability to capture cooled compressed air, the cooling circuit further comprising an air recirculation duct extending between the electric compressor and / or the e control device and the vicinity of the input of the intake manifold.

Ainsi, le gradient de pression aux extrémités du circuit de refroidissement, permettant de faire circuler l'air dans le circuit de refroidissement, est fonction de l'accélération de l'air lorsqu'il s'écoule entre la sortie de l'échangeur thermique et l'entrée du collecteur d'admission.Thus, the pressure gradient at the ends of the cooling circuit, for circulating the air in the cooling circuit, is a function of the acceleration of the air as it flows between the outlet of the heat exchanger and the inlet of the intake manifold.

De cette manière, le circuit de refroidissement permet la circulation d'un flux d'air comprimé refroidi permettant de refroidir le compresseur électrique, même lorsque le régime de fonctionnement du moteur est faible.In this way, the cooling circuit allows the circulation of a cooled compressed air flow to cool the electric compressor, even when the operating speed of the engine is low.

Un tel dispositif présente l'avantage d'asservir le débit dans le circuit de refroidissement au courant de commande du compresseur, qui définit la vitesse de rotation de la roue de compresseur. En effet, plus le courant est élevé, plus la pression à la sortie de l'échangeur thermique sera élevée et par conséquent plus le débit d'air dans le circuit de refroidissement sera important. Aussi, un tel dispositif effectue un asservissement implicite du débit d'air dans le circuit de refroidissement, ce qui permet d'en réduire le coût d'intégration et de développement puisqu'il ne nécessite pas forcément d'asservissement extérieur.Such a device has the advantage of slaving the flow rate in the cooling circuit to the control current of the compressor, which defines the speed of rotation of the compressor wheel. Indeed, the higher the current, the higher the pressure at the outlet of the heat exchanger will be high and therefore the higher the air flow in the cooling circuit will be important. Also, such The device performs an implicit servocontrol of the air flow in the cooling circuit, which makes it possible to reduce the cost of integration and development since it does not necessarily require external servocontrol.

Avantageusement, le compresseur électrique comprend une machine électrique installée dans un carter et le circuit de refroidissement comprend au moins une partie de l'intérieur du carter. Ainsi on peut refroidir de manière simple et efficace les composants de la machine électrique, en particuliers les composants d'électronique de puissance installés dans le carter, le stator et le rotor de la machine électrique.Advantageously, the electric compressor comprises an electric machine installed in a housing and the cooling circuit comprises at least a portion of the interior of the housing. Thus, the components of the electrical machine, in particular the power electronics components installed in the housing, the stator and the rotor of the electric machine, can be cooled simply and efficiently.

Avantageusement, le dispositif de commande comprend un boîtier dans lequel sont disposés au moins une électronique de puissance, le circuit de refroidissement comprenant au moins une partie de l'intérieur du boîtier.Advantageously, the control device comprises a housing in which at least one power electronics is arranged, the cooling circuit comprising at least a part of the inside of the housing.

Avantageusement, le conduit de recirculation débouche au voisinage de l'entrée du collecteur d'admission de sorte à former une jonction orthogonale à la direction de l'écoulement d'air comprimé refroidi au voisinage de ladite jonction. Ainsi, on peut optimiser le gradient de pression aux extrémités du circuit de refroidissement, de manière à obtenir une circulation de l'air suffisante dans le circuit de refroidissement pour refroidir la machine électrique.Advantageously, the recirculation duct opens in the vicinity of the inlet of the intake manifold so as to form a junction orthogonal to the direction of the cooled compressed air flow in the vicinity of said junction. Thus, one can optimize the pressure gradient at the ends of the cooling circuit, so as to obtain sufficient air circulation in the cooling circuit to cool the electric machine.

Avantageusement, le dispositif de refroidissement comprend en outre un moyen de contrôle de la quantité d'air comprimé refroidi autorisée à circuler dans ledit circuit de refroidissement. Ainsi, on peut contrôler la quantité d'air circulant dans le circuit de refroidissement indépendamment des conditions de circulations passives, telles que le gradient de pression aux extrémités du circuit de refroidissement.Advantageously, the cooling device further comprises means for controlling the amount of cooled compressed air allowed to circulate in said cooling circuit. Thus, it is possible to control the amount of air circulating in the cooling circuit independently of the passive circulation conditions, such as the pressure gradient at the ends of the cooling circuit.

Avantageusement, ledit moyen de contrôle comprend une électrovanne. Ainsi on peut obtenir un moyen de contrôle relativement simple à commander et fiable.Advantageously, said control means comprises a solenoid valve. Thus one can obtain a relatively simple control means to control and reliable.

Avantageusement, l'électrovanne est disposée dans le circuit de refroidissement au voisinage de la sortie de l'échangeur thermique. Ceci permet un montage efficace et performant du moyen de contrôle.Advantageously, the solenoid valve is disposed in the cooling circuit in the vicinity of the outlet of the heat exchanger. This allows efficient and effective mounting of the control means.

Avantageusement, le compresseur électrique comprend des moyens de génération d'un flux d'air forcé au travers du circuit de refroidissement, lesdits moyen de génération d'un flux d'air forcé étant par exemple des ailettes disposées sur le rotor, lesdites ailettes pouvant être venues de matière du rotor selon un bobinage particulier de ce dernier.Advantageously, the electric compressor comprises means for generating a forced air flow through the cooling circuit, said means for generating a forced air flow being, for example, fins disposed on the rotor, said fins being able to material from the rotor according to a particular winding of the latter.

L'invention concerne aussi un procédé de commande d'un dispositif de suralimentation tel que décrit précédemment, comprenant des étapes de :

  • acquisition d'une valeur représentative de la température du compresseur ;
  • comparaison de ladite valeur représentative de la température du compresseur avec au moins une valeur d'activation ;
  • détermination d'une valeur d'ouverture du circuit de refroidissement,
  • commande du moyen de contrôle en fonction de ladite valeur d'ouverture déterminée de sorte à contrôler la quantité d'air comprimé refroidi autorisée à circuler dans ledit circuit de refroidissement.
The invention also relates to a method for controlling a supercharging device as described above, comprising steps of:
  • acquisition of a value representative of the temperature of the compressor;
  • comparing said value representative of the compressor temperature with at least one activation value;
  • determining an opening value of the cooling circuit,
  • controlling the control means according to said determined opening value so as to control the amount of cooled compressed air allowed to flow in said cooling circuit.

Ainsi, on peut contrôler de manière rapide et efficace l'ouverture du moyen de contrôle pour refroidir la machine électrique,Thus, it is possible to rapidly and effectively control the opening of the control means for cooling the electric machine,

Avantageusement, le procédé de commande comprend en outre des étapes de :

  • comparaison de ladite valeur représentative de la température du compresseur avec au moins une valeur de désactivation ;
  • détermination d'une valeur de fermeture du circuit de refroidissement, ladite commande du moyen de contrôle étant en outre fonction de ladite valeur de fermeture déterminée.
Advantageously, the control method further comprises steps of:
  • comparing said value representative of the temperature of the compressor with at least one deactivation value;
  • determining a closure value of the cooling circuit, said control of the control means being furthermore a function of said determined closure value.

De cette manière on peut contrôler la fermeture du moyen de contrôle de manière efficace pour maximiser la disponibilité de l'air pour suralimenter le moteur à combustion interne.In this way the closure of the control means can be effectively controlled to maximize the availability of air for supercharging the internal combustion engine.

Avantageusement, le procédé de commande comprend une étape de détermination d'une valeur de gradient de pression associé au circuit de refroidissement, par exemple en fonction de la différence de pression entre le voisinage de la sortie de l'échangeur thermique avec la pression à la jonction au voisinage de l'entrée du collecteur d'admission, la commande du moyen de contrôle étant en outre fonction d'une commande de fermeture déterminée de sorte à ce que, lorsque la valeur de gradient de pression déterminée est inférieure à une valeur de seuil prédéterminée, le moyen de commande interdise au moins partiellement la circulation d'air comprimé refroidi dans le circuit de refroidissement. Ainsi on peut créer une perte de charge artificielle permettant de favoriser la circulation de l'air dans le circuit de refroidissement, même lorsque le gradient de pression aux extrémités du circuit de refroidissement est faible.Advantageously, the control method comprises a step of determining a pressure gradient value associated with the cooling circuit, for example as a function of the pressure difference between the vicinity of the outlet of the heat exchanger and the pressure at the pressure. junction in the vicinity of the entrance of the intake manifold, the control of the means of control being furthermore a function of a closure command determined so that, when the determined pressure gradient value is lower than a predetermined threshold value, the control means at least partially prevents the circulation of cooled compressed air in the cooling circuit. Thus one can create an artificial pressure drop to promote the circulation of air in the cooling circuit, even when the pressure gradient at the ends of the cooling circuit is low.

L'invention concerne un ensemble de suralimentation comprenant un dispositif de suralimentation tel que décrit précédemment et un organe de commande adapté pour mettre en œuvre le procédé de commande.The invention relates to a supercharging assembly comprising a supercharging device as described above and a controller adapted to implement the control method.

L'organe de commande peut être par exemple un calculateur embarqué, un microprocesseur, ou par exemple l'unité de commande du compresseur électrique.The control member may for example be an onboard computer, a microprocessor, or for example the control unit of the electric compressor.

L'invention concerne en outre un véhicule automobile comprenant un dispositif de suralimentation tel que décrit précédemment.The invention further relates to a motor vehicle comprising a supercharging device as described above.

D'autres particularités et avantages de l'invention ressortiront à la lecture de la description faite ci-après d'un mode de réalisation particulier de l'invention, donné à titre indicatif mais non limitatif, en référence aux dessins annexés sur lesquels :

  • la figure 1 est une représentation schématique d'un dispositif de suralimentation selon un mode de réalisation de l'invention ;
  • la figure 2 est une représentation schématique d'un procédé de contrôle d'un dispositif de suralimentation selon le mode de réalisation de la figure 1.
Other features and advantages of the invention will emerge on reading the following description of a particular embodiment of the invention, given by way of indication but not limitation, with reference to the accompanying drawings in which:
  • the figure 1 is a schematic representation of a supercharging device according to one embodiment of the invention;
  • the figure 2 is a schematic representation of a method of controlling a supercharging device according to the embodiment of the figure 1 .

En référence à la figure 1, un dispositif de suralimentation en air 1 d'un moteur à combustion interne 2 comprend une entrée d'air 5 et un compresseur 6.With reference to the figure 1 , an air supercharging device 1 of an internal combustion engine 2 comprises an air inlet 5 and a compressor 6.

Dans la suite de la description, le dispositif de suralimentation 1 et le moteur 2 sont installés dans un véhicule automobile. Cependant, l'invention ne se limite pas uniquement aux véhicules automobiles, et concerne toute installation de dispositif de suralimentation 1 pour un moteur à combustion interne 2.In the rest of the description, the supercharging device 1 and the engine 2 are installed in a motor vehicle. However, the invention is not limited solely to motor vehicles, and relates to any supercharging device installation 1 for an internal combustion engine 2.

Le compresseur 6 reçoit l'air issu de l'entrée d'air 5 après son passage au travers d'un filtre à air 7. Le filtre à air 7 permet de filtrer les particules solides pouvant être véhiculées par l'air et pouvant pourraient endommager le compresseur 6.The compressor 6 receives the air coming from the air inlet 5 after passing through an air filter 7. The air filter 7 makes it possible to filter the solid particles that can be conveyed by the air and that could be damage the compressor 6.

L'air pénétrant par l'entrée d'air 5 provient généralement de l'extérieur de l'ensemble dans lequel sont installés le dispositif de suralimentation 1 et le moteur 2, par exemple de l'extérieur d'un véhicule automobile. Cet air est donc généralement à la pression atmosphérique et à une température ambiante.The air entering through the air inlet 5 generally comes from outside the assembly in which the supercharging device 1 and the engine 2 are installed, for example from the outside of a motor vehicle. This air is therefore generally at atmospheric pressure and at ambient temperature.

En particulier, on peut installer l'entrée d'air en face avant du véhicule automobile, afin d'effectuer une captation dynamique, ou encore au pied du pare-brise, ce qui permet d'obtenir à ces endroits une pression dynamique de l'air maximale.In particular, it is possible to install the air intake on the front of the motor vehicle, in order to perform a dynamic capture, or at the foot of the windshield, which makes it possible to obtain at these locations a dynamic pressure of the vehicle. maximum air.

Le compresseur 6 est ici un compresseur électrique 6 qui comprend une machine électrique 8 installée dans un carter 11 et formée d'un stator 10 et d'un rotor 9.The compressor 6 is here an electric compressor 6 which comprises an electric machine 8 installed in a housing 11 and formed of a stator 10 and a rotor 9.

A titre d'alternative, le compresseur 6, peut être un turbocompresseur assisté par une machine électrique, la machine électrique se substituant alors à la turbine du turbocompresseur pour entrainer la roue de compression, lorsque le moteur fonctionne à bas régime. La mise en œuvre de cette alternative est alors simplement adaptable pour refroidir la machine électrique.Alternatively, the compressor 6 may be a turbocharger assisted by an electric machine, the electric machine then replacing the turbine of the turbocharger to drive the compression wheel, when the engine runs at low speed. The implementation of this alternative is then simply adaptable to cool the electric machine.

Le rotor 9 est installé dans le stator 10 de sorte à pouvoir être entrainé en rotation par le champ électromagnétique produit par ce stator 10.The rotor 9 is installed in the stator 10 so as to be rotated by the electromagnetic field produced by the stator 10.

Un arbre 12 est solidaire à une première extrémité du rotor 9, et traverse le carter 11 de manière à être solidarisé à une autre extrémité à une roue de compresseur 13. Le rotor 9 entraine en rotation l'arbre 12 qui entraine à son tour la roue de compresseur 13.A shaft 12 is secured to a first end of the rotor 9, and passes through the housing 11 so as to be secured at another end to a compressor wheel 13. The rotor 9 rotates the shaft 12 which in turn drives the compressor wheel 13.

Lorsque la roue de compresseur 13 est actionnée, l'air provenant de l'entrée d'air 5 est comprimé, et par conséquent s'échauffe.When the compressor wheel 13 is actuated, the air from the air inlet 5 is compressed, and therefore heats up.

Ici, le compresseur 6 est commandé par une unité de commande embarquée 20.Here, the compressor 6 is controlled by an onboard control unit 20.

L'unité de commande embarquée 20 reçoit une valeur de demande de puissance du moteur 2, par exemple en fonction de la force produite par l'utilisateur du véhicule automobile sur la pédale d'accélérateur 21, ou de la position que l'utilisateur donne à ladite pédale d'accélérateur 21.The on-board control unit 20 receives a power demand value from the engine 2, for example as a function of the force produced by the user of the motor vehicle on the accelerator pedal 21, or the position that the user gives to said accelerator pedal 21.

En fonction du régime de fonctionnement du moteur 2, l'unité de commande embarquée 20 calcule le couple nécessaire pour obtenir rapidement la puissance demandée.Depending on the operating speed of the engine 2, the on-board control unit 20 calculates the necessary torque to quickly obtain the requested power.

Si le besoin en couple est supérieur à ce que produit le moteur 2 sans suralimentation, l'unité de commande embarquée actionne le compresseur 6 de sorte qu'il apporte au moteur 2 un taux suffisant d'air suralimenté pour augmenter le couple produit.If the need in torque is greater than that produced by the engine 2 without supercharging, the on-board control unit actuates the compressor 6 so that it provides the engine 2 a sufficient rate of supercharged air to increase the torque produced.

L'air ainsi comprimé, qui a été échauffé lors de sa compression, est conduit vers un échangeur thermique 14, ici un refroidisseur d'air de suralimentation 14, aussi connu sous le nom anglophone d'intercooler, permettant de refroidir l'air comprimé.The compressed air, which has been heated during its compression, is led to a heat exchanger 14, here a charge air cooler 14, also known as the English intercooler, for cooling the compressed air .

L'air comprimé refroidi sortant de l'échangeur thermique 14 s'écoule jusqu'au collecteur d'admission 3 du moteur 2 de sorte à pouvoir être injecté dans les cylindres du moteur 2.The cooled compressed air exiting the heat exchanger 14 flows to the intake manifold 3 of the engine 2 so that it can be injected into the cylinders of the engine 2.

Le dispositif de suralimentation 1 comprend aussi un circuit de refroidissement 41,42 du compresseur 6.The supercharging device 1 also comprises a cooling circuit 41, 42 of the compressor 6.

Le circuit de refroidissement 41,42, est formé d'un conduit d'apport en air 41 et d'un conduit de recirculation de l'air 42.The cooling circuit 41, 42 is formed of an air supply duct 41 and an air recirculation duct 42.

Le circuit de refroidissement 41,42 constitue donc un circuit parallèle 41,42 au circuit principal 44 de suralimentation décrit précédemment.The cooling circuit 41, 42 therefore constitutes a parallel circuit 41, 42 to the main supercharging circuit 44 previously described.

Les conduits du circuit de refroidissement 41, 42 peuvent être fixé au circuit principal 44 par filetage, par emmanchement à force sur des conduits rigides ou droits, par exemple pourvus de renflements, ou encore verrouillés par des colliers.The ducts of the cooling circuit 41, 42 may be fixed to the main circuit 44 by threading, by press fitting on rigid or straight ducts, for example provided with bulges, or else locked by collars.

Les conduits du circuit de refroidissement 41, 42 peuvent être faits en tout matériau adapté, par exemple du caoutchouc siliconé, toilé, par exemple avec treillis métallique, en téflon, en nylon. De manière générale, chaque conduit du circuit de refroidissement peut être réalisé à partir d'au moins un matériau ou un combinatoire de matériaux qui est apte à isoler thermiquement le flux d'air refroidi circulant dans les conduits de l'environnement à température élevé qu'est le compartiment moteur. Cela vise à maintenir une température constante du flux d'air destiné au refroidissement du compresseur.The ducts of the cooling circuit 41, 42 may be made of any suitable material, for example silicone rubber, fabricated, for example with wire mesh, Teflon, nylon. In general, each duct of the cooling circuit can be made from at least one material or a combinatorial of materials that is able to thermally isolate the flow of cooled air circulating in the ducts of the environment. high temperature that is the engine compartment. This is to maintain a constant airflow temperature for cooling the compressor.

Le conduit d'apport en air 41 est adapté pour fournir de l'air frais apte à refroidir la machine électrique du compresseur 6.The air supply duct 41 is adapted to supply fresh air capable of cooling the electric machine of the compressor 6.

Ici le conduit d'apport en air 41 s'étend entre la sortie 47 de l'échangeur thermique 14 et le compresseur 6.Here the air supply duct 41 extends between the outlet 47 of the heat exchanger 14 and the compressor 6.

En particulier, le conduit d'apport en air 41 pénètre dans le carter 11 de la machine électrique 8 de sorte à mettre l'air débouchant dans le carter 11 au contact notamment du stator 10, du rotor 9, mais aussi du logement où se trouvent les composants d'électronique de puissance du dispositif de commande qui gèrent la puissance introduite dans le stator ou le rotor selon la technologie de conception de la machine électrique, afin de les refroidir par échange thermique.In particular, the air supply duct 41 enters the casing 11 of the electrical machine 8 so as to put the air opening into the casing 11 in contact in particular with the stator 10, the rotor 9, but also the housing where find the power electronics components of the control device that manage the power introduced into the stator or the rotor according to the design technology of the electric machine, in order to cool them by heat exchange.

Selon une variante de réalisation de l'invention, le dispositif de commande comportant l'électronique de puissance est déporté de la machine électrique, par exemple selon un agencement des dispositifs de puissance dans un boîtier dédié et séparé du carter 11, le circuit de refroidissement 41, 42 intègre ledit boîtier en ce sens que ce dernier définit une partie du conduit d'écoulement de l'air de refroidissement.According to an alternative embodiment of the invention, the control device comprising the power electronics is remote from the electrical machine, for example according to an arrangement of the power devices in a dedicated housing and separated from the housing 11, the cooling circuit 41, 42 integrates said housing in that the latter defines a portion of the flow duct cooling air.

On installe un conduit de recirculation 42 de l'air, qui s'étend entre l'intérieur du carter 11 de la machine électrique 8 et le voisinage de l'entrée 45 du collecteur d'admission 3.An air recirculation duct 42 is installed, which extends between the interior of the casing 11 of the electrical machine 8 and the vicinity of the inlet 45 of the intake manifold 3.

Le conduit de recirculation 42 débouche en un point de jonction 48, dans le circuit principal 44, de manière orthogonale à la direction du flux de l'air circulant dans le circuit principal 44 au point de jonction 48 avec le conduit de recirculation 42.The recirculation duct 42 opens at a junction point 48, in the main circuit 44, orthogonal to the direction of the flow of air flowing in the main circuit 44 at the junction point 48 with the recirculation duct 42.

Ce point de jonction 48 sera choisi de sorte à ce que l'air circulant dans le circuit principal 44 à ce point de jonction 48 présente une vitesse sensiblement maximale.This junction point 48 will be chosen so that the air circulating in the main circuit 44 at this junction point 48 has a substantially maximum speed.

Faute de pouvoir déterminer le point du circuit principal 44 présentant une vitesse de circulation de l'air sensiblement maximale, on choisira alors le point de jonction 48 de manière à ce qu'il soit le plus éloigné possible de la sortie 47 de l'échangeur thermique 14, et donc le plus proche possible du collecteur d'admission 3.If it is not possible to determine the point of the main circuit 44 having a substantially maximum air circulation rate, then the junction point 48 will be chosen so that it is as far as possible from the outlet 47 of the heat exchanger 14, and therefore as close as possible to the intake manifold 3.

Le conduit de recirculation 42 permet tout d'abord de réintroduire l'air ayant servi pour refroidir la machine électrique 8 en amont du collecteur d'admission 3, ce qui permet de préserver le débit global d'air à l'entrée du collecteur d'admission 3.The recirculation duct 42 firstly makes it possible to reintroduce the air used to cool the electrical machine 8 upstream of the intake manifold 3, which makes it possible to preserve the overall air flow at the inlet of the collector. admission 3.

En outre, le carter 11 formant d'un point de vue général, une enveloppe sensiblement hermétique à l'air, le gradient de pression entre le voisinage de l'entrée 45 du collecteur d'admission 3 et la sortie 47 de l'échangeur thermique 14 permet d'obtenir une dépression faisant circuler l'air dans le circuit de refroidissement 41,42 depuis la sortie 47 de l'échangeur thermique 14 jusqu'au voisinage de l'entrée 45 du collecteur d'admission 3 de sorte à créer un flux d'air refroidissant l'intérieur du carter 11 de la machine électrique 8.In addition, the housing 11 forming from a general point of view, a substantially airtight envelope, the pressure gradient between the vicinity of the inlet manifold 45 inlet 3 and the outlet 47 of the exchanger 14 provides a vacuum circulating the air in the cooling circuit 41,42 from the outlet 47 of the heat exchanger 14 to the vicinity of the inlet manifold 45 inlet 3 so as to create a flow of air cooling the interior of the casing 11 of the electric machine 8.

En effet, l'air s'écoulant entre la sortie 47 de l'échangeur thermique 14 et le collecteur d'admission 3 dans le circuit principal 44 est accéléré.Indeed, the air flowing between the outlet 47 of the heat exchanger 14 and the intake manifold 3 in the main circuit 44 is accelerated.

Aussi, par application du théorème de Bernoulli, l'air accéléré au voisinage de l'entrée du collecteur d'admission 3 présente une pression moindre que l'air plus lent au voisinage de la sortie 47 de l'échangeur thermique 14, de telle sorte que l'air peut être aspiré dans le circuit de refroidissement 41,42 parallèle.Also, by applying the Bernoulli theorem, the accelerated air in the vicinity of the inlet of the intake manifold 3 has a lower pressure than the slower air in the vicinity of the outlet 47 of the heat exchanger 14, such as so that the air can be sucked into the cooling circuit 41,42 parallel.

L'accélération de l'air peut être produite par la forme particulière du collecteur d'admission 3 ou du circuit principal 44, cependant si l'air n'est pas naturellement accélérés dans la portion de circuit principal 44 entre la sortie 47 de l'échangeur thermique 14 et le voisinage de l'entrée 45 du collecteur d'admission 3, un dispositif venturi peut être installé entre l'échangeur thermique 14 et l'entrée du collecteur d'admission 3, dans le circuit principal 44, de sorte à forcer l'accélération de l'air, et à créer un gradient de pression favorable à la circulation de l'air dans le circuit de refroidissement 41,42.The acceleration of the air can be produced by the particular shape of the intake manifold 3 or the main circuit 44, however if the air is not naturally accelerated in the main circuit portion 44 between the outlet 47 of the heat exchanger 14 and the vicinity of inlet 45 of intake manifold 3, a venturi device may be installed between heat exchanger 14 and inlet of intake manifold 3, in main circuit 44, so forcing the acceleration of the air, and creating a pressure gradient favorable to the circulation of air in the cooling circuit 41,42.

On peut aussi, selon une alternative non représentée, installer une roue à ailette de compression dans le carter 11 de la machine électrique 8 de sorte à créer un phénomène de pompage de l'air dans le conduit d'apport en air 41, et à accélérer le débit d'air de refroidissement.It is also possible, according to an alternative not shown, to install a compression fin wheel in the casing 11 of the electrical machine 8 so as to create a phenomenon of pumping air into the air supply duct 41, and to accelerate the cooling air flow.

Dans ce cas, le dispositif de suralimentation comprend au niveau du compresseur électrique 6, des moyens de génération d'un flux d'air forcé au travers du circuit de refroidissement 41, 42. A titre d'exemples, lesdits moyens de génération d'un flux d'air forcé peuvent être des ailettes disposées en périphérie du rotor. Selon une variante de réalisation de ces ailettes, elles peuvent être venues de matière du rotor selon un bobinage particulier de ce dernier. Avantageusement, la mise en rotation du rotor engendre la mise en mouvement des ailettes, ce qui contraint l'air à circuler dans les conduits du circuit de refroidissement 41, 42.In this case, the supercharging device comprises, at the level of the electric compressor 6, means for generating a forced air flow through the cooling circuit 41, 42. By way of examples, said means for generating a forced air flow may be fins disposed at the periphery of the rotor. According to an alternative embodiment of these fins, they may be of rotor material according to a particular winding of the latter. Advantageously, the rotation of the rotor causes the wings to move, which forces the air to circulate in the ducts of the cooling circuit 41, 42.

Dans le mode de réalisation selon la figure 1, le circuit de refroidissement 41,42 comprend un moyen de contrôle 60 du débit d'air.In the embodiment according to figure 1 , the cooling circuit 41,42 comprises a control means 60 of the air flow.

Le moyen de contrôle 60 est ici une électrovanne 60 installée au voisinage de l'extrémité du conduit d'apport en air 41 débouchant au voisinage de la sortie 47 de l'échangeur thermique 14.The control means 60 is here a solenoid valve 60 installed in the vicinity of the end of the air supply duct 41 opening out in the vicinity of the outlet 47 of the heat exchanger 14.

Selon une alternative, le moyen de contrôle 60 peut comprendre une membrane ou un pointeau, installé dans le circuit de refroidissement 41,42 au voisinage de la machine électrique 8, et venant obstruer de façon étanche le circuit de refroidissement 41,42. Le pointeau ou la membrane est mécaniquement lié à un ressort en appui sur le circuit d'apport d'air 41, dont la dilatation fait augmenter la longueur, de sorte qu'il exerce une force qui écarte la membrane ou le pointeau, venant ainsi dégager un passage audit fluide. Le dimensionnement du ressort est fait de façon à ce que le circuit soit ouvert lorsque la température du compresseur électrique 6 ayant conduit à la dilatation du ressort, corresponde à un seuil T1 de déclenchement du refroidissement.According to an alternative, the control means 60 may comprise a membrane or a needle, installed in the cooling circuit 41, 42 in the vicinity of the electrical machine 8, and sealingly closing the cooling circuit 41, 42. The needle or the membrane is mechanically connected to a spring bearing on the air intake circuit 41, the expansion of which increases the length, so that it exerts a force that moves the membrane or the needle, thus clear a passageway to said fluid. The dimensioning of the spring is made so that the circuit is open when the temperature of the electric compressor 6 having led to the expansion of the spring, corresponds to a threshold T1 for triggering the cooling.

Dans le mode principal, l'électrovanne 60 peut être contrôlée par un organe de commande 20 indépendant ou directement par l'unité de commande embarquée 20 commandant le compresseur 6.In the main mode, the solenoid valve 60 can be controlled by an independent control member 20 or directly by the on-board control unit 20 controlling the compressor 6.

L'électrovanne 60 est adaptée pour passer d'une position ouverte dans laquelle l'air est libre de passer dans le circuit de refroidissement 41,42 à une position fermée interdisant le passage de l'air dans le circuit de refroidissement 41,42. L'électrovanne 60 est en outre adaptée pour prendre plusieurs positions intermédiaires modulant le débit d'air autorisé dans le circuit de refroidissement 41,42.The solenoid valve 60 is adapted to pass from an open position in which the air is free to pass in the cooling circuit 41, 42 to a closed position preventing the passage of air in the cooling circuit 41, 42. The solenoid valve 60 is further adapted to take several positions intermediates modulating the allowable air flow in the cooling circuit 41,42.

En particulier, lorsque le compresseur 6 présente une température de fonctionnement ne nécessitant pas un refroidissement actif, l'électrovanne peut être positionnée sur une position fermée. De cette manière aucune perte de charge n'est produite au niveau du circuit principal 44 de suralimentation en air, et le fonctionnement du moteur 2 est, à cet égard, optimal.In particular, when the compressor 6 has an operating temperature that does not require active cooling, the solenoid valve can be positioned in a closed position. In this way no pressure drop is produced at the main circuit 44 air supercharging, and the operation of the motor 2 is, in this respect, optimal.

Un procédé de commande de l'électrovanne 60, mis en œuvre par l'organe de commande 20, comprend une première étape dans laquelle on reçoit 100 pour chaque instant t une valeur représentative de la température Tce de la machine électrique 8 du compresseur 6, à laquelle on se référera, pour plus de lisibilité, comme étant la température Tce de la machine électrique 8.A method of controlling the solenoid valve 60, implemented by the control member 20, comprises a first step in which 100 is received for each instant t a value representative of the temperature Tce of the electric machine 8 of the compressor 6, to which will be referred, for more legibility, as being the Tce temperature of the electric machine 8.

La température Tce de la machine électrique 8 peut être fournie par une sonde de température installée dans le carter 11 de la machine 8.The temperature Tce of the electrical machine 8 can be provided by a temperature sensor installed in the housing 11 of the machine 8.

Selon une alternative, la température Tce de la machine électrique 8 peut être obtenue par un moyen de calcul, par exemple un microprocesseur, adapté pour calculer en fonction du régime moteur, du fonctionnement du compresseur et de tout autre paramètre adapté, une valeur estimée et/ou prédictive pour les instants suivants, de la température Tce de la machine électrique 8.According to an alternative, the temperature Tce of the electrical machine 8 can be obtained by a calculation means, for example a microprocessor, adapted to calculate, as a function of the engine speed, the compressor operation and any other suitable parameter, an estimated value and / or predictive for the following instants, the Tce temperature of the electric machine 8.

Selon une autre alternative, un moyen de calcul, par exemple un microprocesseur, peut mettre en œuvre un modèle thermique de dissipation adapté pour prédire réchauffement de la machine électrique, afin d'anticiper la régulation de l'ouverture de l'électrovanne 60, pour optimiser la régulation de la température Tce dans le carter 11 de la machine électrique 8According to another alternative, a calculation means, for example a microprocessor, can implement a heat dissipation model adapted to predict heating of the electric machine, in order to anticipate the regulation of the opening of the solenoid valve 60, for optimize temperature control Tce in the housing 11 of the electrical machine 8

Si l'électrovanne 60 est dans une position fermée, on compare 101 ensuite la température Tce de la machine électrique 8 à une température limite supérieure T1, dite température d'activation T1, par exemple une température d'activation T1 comprise entre 60°C et 150°C.If the solenoid valve 60 is in a closed position, the temperature Tce of the electrical machine 8 is then compared with an upper limit temperature T1, called the activation temperature T1, for example an activation temperature T1 between 60 ° C. and 150 ° C.

Si la température Tce de la machine électrique 8 dépasse la température d'activation, on commande 105 l'ouverture de l'électrovanne 60 de sorte à permettre la circulation d'air dans le circuit de refroidissement 41,42, lequel est inférieur à 50°C. L'échangeur thermique 14 peut être un échangeur de type eau/air, en ce sens que le circuit d'eau de refroidissement est un circuit de refroidissement dit à basse température, la température de l'eau ne dépassant pas les 60°C, de préférence étant de 50°C, comparativement à un circuit de refroidissement dit à haute température, tel que le circuit de refroidissement du moteur dont le fluide de refroidissement avoisine une température comprise entre 90°C et 120°C. Selon une variante de réalisation, l'échangeur thermique 14 peut être du type air/air, disposé en face avant du véhicule afin de puiser les frigories de l'air afin de refroidir l'air comprimé.If the temperature Tce of the electrical machine 8 exceeds the activation temperature, the opening of the solenoid valve 60 is commanded 105 so as to allow the circulation of air in the cooling circuit 41, 42, which is less than 50 ° C. The heat exchanger 14 may be a water / air type exchanger, in that the cooling water circuit is a cooling circuit said to be at a low temperature, the water temperature not exceeding 60 ° C. preferably at 50.degree. C., compared with a so-called high temperature cooling circuit, such as the cooling circuit of the engine, the cooling fluid of which approaches a temperature of between 90.degree. C. and 120.degree. According to an alternative embodiment, the heat exchanger 14 may be of the air / air type, disposed on the front of the vehicle to draw the frigories of air to cool the compressed air.

Si l'électrovanne 60 est dans une position ouverte, alors pour chaque instant t, on compare 107 la valeur de température de la machine électrique 8 à une valeur de désactivation T2, par exemple une valeur de température comprise entre 40°C et 80°C.If the solenoid valve 60 is in an open position, then for each instant t, the temperature value of the electrical machine 8 is compared with a deactivation value T2, for example a temperature value of between 40 ° C. and 80 ° C. C.

Si la valeur de température de la machine électrique 8 est inférieure à la valeur de désactivation T2, alors on commande 110 la fermeture de l'électrovanne 60.If the temperature value of the electrical machine 8 is lower than the deactivation value T2, then the solenoid valve 60 is closed.

Dans ce mode de réalisation la valeur de désactivation T2 est inférieure à la valeur d'activation T1 de sorte à assurer un refroidissement suffisant de la machine électrique 8.In this embodiment, the deactivation value T2 is lower than the activation value T1 so as to ensure sufficient cooling of the electrical machine 8.

On peut aussi, prévoir une pluralité de valeurs de température d'activation T1, chaque valeur de température d'activation T1 définissant une position d'ouverture intermédiaire différente de l'électrovanne 60, de sorte que chaque valeur d'activation T1 autorise un débit de circulation correspondant à une fraction différente du débit maximal possible dans le circuit de refroidissement 41,42, lorsque l'électrovanne 60 est en position totalement ouverte. Aussi, plus la valeur de température d'activation T1 est grande, plus l'ouverture de l'électrovanne 60 est importante.It is also possible to provide a plurality of activation temperature values T1, each activation temperature value T1 defining an intermediate opening position different from the solenoid valve 60, so that each activation value T1 allows a flow rate circulation corresponding to a different fraction of the maximum possible flow in the cooling circuit 41,42, when the solenoid valve 60 is in the fully open position. Also, the higher the activation temperature value T1, the greater the opening of the solenoid valve 60 is important.

On peut aussi prévoir une pluralité de valeurs de désactivation, de sorte à refermer graduellement l'électrovanne 60, à mesure du refroidissement de la machine électrique 8.It is also possible to provide a plurality of deactivation values, so as to gradually close the solenoid valve 60 as the electric machine 8 cools down.

De cette manière on peut contrôler le débit autorisé d'air dans le circuit de refroidissement 41,42, de manière à maximiser la circulation de l'air comprimé refroidi dans le circuit principal 44 en fonction des besoins en refroidissement de la machine électrique 8.In this way it is possible to control the authorized flow of air in the cooling circuit 41, 42 so as to maximize the circulation of the compressed air cooled in the main circuit 44 according to the cooling requirements of the electric machine 8.

Selon une alternative, on calcule le gradient de pression aux extrémités du circuit de refroidissement 41,42, par exemple en fonction des valeurs de pressions mesurées, ou estimées, au voisinage de la sortie 47 de l'échangeur thermique 14, de la pression à la jonction 48 au voisinage de l'entrée 45 du collecteur d'admission 3, et de la longueur du circuit principal 44.According to an alternative, the pressure gradient at the ends of the cooling circuit 41, 42 is calculated, for example as a function of the measured or estimated pressure values, in the vicinity of the outlet 47 of the heat exchanger 14, of the pressure at the junction 48 in the vicinity of the inlet 45 inlet of the intake manifold 3, and the length of the main circuit 44.

Si le gradient calculé présente une valeur comprise entre de l'ordre 10 et 300 mbar, on commande une fermeture partielle du moyen de contrôle 60, ici l'électrovanne, afin de créer une perte de charge, de sorte que par effet Venturi, le débit d'air dans le circuit principal 44 au voisinage de l'entrée 45 du collecteur d'admission 3 produit une aspiration de l'air dans le circuit de refroidissement 41,42.If the calculated gradient has a value between of the order of 10 and 300 mbar, it controls a partial closure of the control means 60, here the solenoid valve, to create a pressure drop, so that by Venturi effect, the air flow in the main circuit 44 in the vicinity of the inlet 45 of the intake manifold 3 produces a suction of air in the cooling circuit 41,42.

On pourra en outre, prévoir un critère dans le procédé de commande consistant à interdire le passage d'air dans le circuit de refroidissement 41,42, lorsqu'une très forte demande de puissance moteur est demandée, afin de ne pas brider le contrôle du véhicule.It will also be possible to provide a criterion in the control method of preventing the passage of air in the cooling circuit 41, 42, when a very high demand for engine power is required, so as not to restrict the control of the engine. vehicle.

Selon une autre alternative, on peut prévoir de contrôler l'ouverture et la fermeture de l'électrovanne 60 en fonction d'une hystérésis calibrée par des valeurs prédéterminées de température de la machine électrique Tce.According to another alternative, it can be provided to control the opening and closing of the solenoid valve 60 as a function of a hysteresis calibrated by predetermined temperature values of the electric machine Tce.

Tout en restant dans le périmètre de l'invention, le dispositif de suralimentation en air d'un moteur à combustion interne, peut aussi comprendre un compresseur traditionnel en complément du compresseur électrique 6, chacun fonctionnant préférentiellement en des points distincts de charge du moteur à combustion interne 2.While remaining within the scope of the invention, the air supercharging device of an internal combustion engine, may also include a conventional compressor in addition to the electric compressor 6, each preferably operating at different points of load of the engine to internal combustion 2.

Le conduit d'alimentation en air refroidi le compresseur électrique 6 est de préférence un piquage réalisé à proximité de l'échangeur 14, voire selon une mode de réalisation, directement compris dans la boîte collectrice de sortie de l'échangeur 14 qui comprend alors une sortie principale 47 d'air et une sortie secondaire par laquelle peut transiter l'air de refroidissement en direction du compresseur électrique 6 ou du dispositif de commande à refroidir. Selon une variante de réalisation non représenté, le moyen de contrôle du débit d'air comprenant la vanne 60 peut être directement intégré dans l'échangeur 14, par exemple par moulage d'une boîte collectrice de sortie.The air supply duct cooled the electric compressor 6 is preferably a stitching made close to the exchanger 14, or even according to one embodiment, directly included in the outlet manifold of the exchanger 14 which then comprises a main air outlet 47 and a secondary outlet through which the cooling air can pass in the direction of the electric compressor 6 or the control device to be cooled. According to an alternative embodiment not shown, the means of controlling the air flow rate including the valve 60 can be directly integrated in the exchanger 14, for example by molding an outlet manifold.

Claims (12)

  1. Device (1) for supercharging an internal combustion engine (2), comprising an air inlet (5), an electric compressor (6) operated by a suitable control device, for compressing the air coming from the air inlet (5) and a heat exchanger (14) for cooling the compressed air coming from the compressor (6), the cooled compressed air flowing toward an intake manifold (3) of the internal combustion engine (2),
    characterized in that said supercharging device (1) comprises a cooling circuit (41, 42) for cooling the electric compressor (6) and/or the control device, the cooling circuit (41, 42) comprising an air-conveying pipe (41) conveying air to the electric compressor (6) and/or to the control device, extending between the outlet (47) of the heat exchanger (14) and the electric compressor (6) and/or the control device, so as to be able to pick up cooled compressed air, the cooling circuit further comprising an air recirculation pipe (42) extending between the electric compressor (6) and/or the control device and the vicinity of the inlet (45) of the intake manifold (3).
  2. Supercharging device according to Claim 1, characterized in that the electric compressor (6) comprises an electric machine (8) installed in a casing (11) and in that the cooling circuit (41, 42) comprises at least part of the inside of the casing (11).
  3. Supercharging device according to Claim 1 or 2, characterized in that the control device comprises a housing in which at least one item of power electronics is housed, and in that the cooling circuit (41, 42) comprises at least part of the inside of the housing.
  4. Supercharging device according to one of Claims 1 to 3, characterized in that the recirculation pipe (42) opens out in the vicinity of the inlet (45) of the intake manifold (3) so as to form a junction (48) orthogonal to the direction of the flow of cooled compressed air in the vicinity of said junction (48).
  5. Supercharging device according to any one of Claims 1 to 4, characterized in that it further comprises a control means (20) controlling the quantity of cooled compressed air allowed to circulate in said cooling circuit (41, 42).
  6. Supercharging device according to Claim 5, characterized in that said control means (20) comprises a solenoid valve (60).
  7. Supercharging device according to Claim 6, characterized in that the solenoid valve (60) is arranged in the cooling circuit (41, 42) in the vicinity of the outlet (47) of the heat exchanger (14).
  8. Supercharging device according to any one of the preceding claims, characterized in that the electric compressor (6) comprises means of generating a forced air stream through the cooling circuit (41, 42), said means of generating a forced air stream being, for example, vanes arranged on the rotor, said vanes being able to be formed as one with the rotor according to a particular winding of the latter.
  9. Control method (200) for controlling a supercharging device (1) according to any one of Claims 5 to 8, characterized in that it comprises steps of:
    - acquiring (100) a value indicative of the compressor temperature (Tce);
    - comparing (101) said value indicative of the compressor temperature (Tce) against at least one activation value (T1);
    - determining a value for the opening of the cooling circuit (41, 42),
    - commanding (105, 110) the control means (60) as a function of said determined opening value so as to control the quantity of cooled compressed air allowed to circulate in said cooling circuit (41, 42).
  10. Control method (200) according to Claim 9, characterized in that it comprises steps of:
    - comparing (107) said value indicative of the compressor temperature (Tce) against at least one deactivation value (T2);
    - determining a value for closing the cooling circuit, said commanding (105, 110) of the control means (60) also being a function of said determined closing value.
  11. Control method (200) according to Claim 9 or 10, characterized in that it comprises a step of determining a value for the pressure gradient associated with the cooling circuit (41, 42), the commanding (105, 110) of the control means (60) also being a function of said pressure gradient value, so that when the pressure gradient value is below a predetermined threshold value, the control means (60) at least partially prevents the circulation of cooled compressed air in the cooling circuit (41, 42).
  12. Motor vehicle comprising a supercharging device (1) according to any one of Claims 1 to 8.
EP17707383.0A 2016-02-08 2017-02-06 Charged air supply device of an internal combustion engine Active EP3414438B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1650972A FR3047515B1 (en) 2016-02-08 2016-02-08 AIR SUPPLY DEVICE OF AN INTERNAL COMBUSTION ENGINE.
PCT/FR2017/050266 WO2017137687A1 (en) 2016-02-08 2017-02-06 Air supercharging device for an internal combustion engine

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EP (1) EP3414438B1 (en)
JP (1) JP6882308B2 (en)
KR (1) KR102102343B1 (en)
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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107806382A (en) * 2017-10-10 2018-03-16 安徽江淮汽车集团股份有限公司 A kind of novel gas inlet system
CN114750611A (en) * 2022-06-10 2022-07-15 吉泰车辆技术（苏州）有限公司 Range extender and method for improving efficiency by reducing air pressure of generator

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3741677A (en) * 1971-10-12 1973-06-26 Barodyne Inc Flow control apparatus for a centrifugal compressor
AT408785B (en) * 1995-11-30 2002-03-25 Blank Otto Ing CHARGER FOR THE CHARGE AIR OF AN INTERNAL COMBUSTION ENGINE
DE19845375A1 (en) * 1998-10-02 2000-04-06 Asea Brown Boveri Indirect cooling process for flow in gap between turbine rotor and stator, involving use of water to cool stator part adjacent to gap
DE10040508A1 (en) * 2000-08-18 2002-02-28 Daimler Chrysler Ag Exhaust gas turbocharger for internal combustion engine, has bearing housing cooled with air released from charge-air cooler arranged between compressor and suction unit of internal combustion engine
RU2193673C2 (en) * 2001-02-15 2002-11-27 Открытое акционерное общество "Специальное конструкторское бюро турбонагнетателей" Controlled turbo-supercharging system
US6609375B2 (en) * 2001-09-14 2003-08-26 Honeywell International Inc. Air cooling system for electric assisted turbocharger
DE10156704A1 (en) * 2001-11-13 2003-05-22 Iav Gmbh Method and appliance for operating exhaust gas turbocharger for IC engines with electrically assisted drive based on comparison of actual operating conditions and family of operating characteristics
JP3843932B2 (en) * 2002-03-26 2006-11-08 トヨタ自動車株式会社 Turbocharger
JP2003298268A (en) * 2002-03-29 2003-10-17 Denso Corp Casing structure of electronic controller, and cooling structure for the electronic controller
US6668553B1 (en) * 2002-09-13 2003-12-30 Honeywell International Inc. Ejector-based cooling system for turbochargers
US7302804B2 (en) * 2003-06-24 2007-12-04 Honeywell International, Inc. Cabin air compressor cooling system
DE10343758B4 (en) * 2003-09-22 2015-02-19 Robert Bosch Gmbh Method for limiting the pressure increase in a high-pressure fuel system after stopping an internal combustion engine
JP4367184B2 (en) * 2003-10-03 2009-11-18 トヨタ自動車株式会社 Turbocharger
US7056103B2 (en) * 2004-03-05 2006-06-06 Honeywell International, Inc. Method and apparatus for cooling turbomachinery components
JP4539487B2 (en) * 2005-08-05 2010-09-08 株式会社Ｉｈｉ Supercharger with electric motor
US7448212B2 (en) * 2006-02-27 2008-11-11 International Engine Intellectual Property Company, Llc Engine bleed air passage and method
US8439019B1 (en) * 2009-02-25 2013-05-14 Accessible Technologies, Inc. Compressed air delivery system with integrated cooling of a continuous variable transmission
US8544453B2 (en) * 2009-09-25 2013-10-01 James E. Bell Supercharger cooling
JP5174073B2 (en) * 2010-03-18 2013-04-03 三菱重工業株式会社 Electric supercharger
FR3022946B1 (en) * 2014-06-26 2019-06-28 Valeo Systemes De Controle Moteur ENGINE SYSTEM WITH BURN GAS RECIRCULATION CIRCUIT

Non-Patent Citations (1)

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

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EP3414438A1 (en) 2018-12-19
US20190153934A1 (en) 2019-05-23
US10480400B2 (en) 2019-11-19
FR3047515B1 (en) 2018-02-02
JP6882308B2 (en) 2021-06-02
FR3047515A1 (en) 2017-08-11
KR20180107248A (en) 2018-10-01
KR102102343B1 (en) 2020-04-20
RU2698374C1 (en) 2019-08-26
CN108699962B (en) 2021-01-08
CN108699962A (en) 2018-10-23
JP2019512059A (en) 2019-05-09
WO2017137687A1 (en) 2017-08-17

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