WO2008129190A1 - Energy recovery device and method for the internal combustion engine of an automobile - Google Patents

Energy recovery device and method for the internal combustion engine of an automobile Download PDF

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Publication number
WO2008129190A1
WO2008129190A1 PCT/FR2008/050405 FR2008050405W WO2008129190A1 WO 2008129190 A1 WO2008129190 A1 WO 2008129190A1 FR 2008050405 W FR2008050405 W FR 2008050405W WO 2008129190 A1 WO2008129190 A1 WO 2008129190A1
Authority
WO
WIPO (PCT)
Prior art keywords
fan
motor
air flow
motor vehicle
energy recovery
Prior art date
Application number
PCT/FR2008/050405
Other languages
French (fr)
Inventor
Lahsen Ait-Taleb
Richard Balmy
Original Assignee
Renault S.A.S
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Renault S.A.S filed Critical Renault S.A.S
Publication of WO2008129190A1 publication Critical patent/WO2008129190A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K11/00—Arrangement in connection with cooling of propulsion units
    • B60K11/08—Air inlets for cooling; Shutters or blinds therefor
    • B60K11/085—Air inlets for cooling; Shutters or blinds therefor with adjustable shutters or blinds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L8/00—Electric propulsion with power supply from forces of nature, e.g. sun or wind
    • B60L8/006—Converting flow of air into electric energy, e.g. by using wind turbines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • 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
    • 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
    • F01P5/06—Guiding or ducting air to, or from, ducted fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
    • F03D9/20—Wind motors characterised by the driven apparatus
    • F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K16/00—Arrangements in connection with power supply of propulsion units in vehicles from forces of nature, e.g. sun or wind
    • B60K2016/006—Arrangements in connection with power supply of propulsion units in vehicles from forces of nature, e.g. sun or wind wind power driven
    • 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
    • F01P2005/046—Pump-driving arrangements with electrical pump drive
    • 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
    • F01P2025/00—Measuring
    • F01P2025/60—Operating parameters
    • F01P2025/66—Vehicle speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/90—Mounting on supporting structures or systems
    • F05B2240/94—Mounting on supporting structures or systems on a movable wheeled structure
    • F05B2240/941—Mounting on supporting structures or systems on a movable wheeled structure which is a land vehicle
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/88—Optimized components or subsystems, e.g. lighting, actively controlled glasses
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/90—Energy harvesting concepts as power supply for auxiliaries' energy consumption, e.g. photovoltaic sun-roof

Definitions

  • the present invention relates to the automotive field, and more particularly to the recovery of energy from the rotary drive of a fan which is generally associated with a heat exchanger for an internal combustion engine, or any other engine having a system cooling (fuel cell, electric machine).
  • An internal combustion drive motor or any other motor having a cooling system, is generally cooled by circulating a coolant, in practice water mixed with an antifreeze, which passes through the main parts of the engine to be cooled.
  • the cooling circuit essentially comprises a circulation pump driven by the engine and a radiator consisting of a water / air heat exchanger capable of cooling the water circulated by the pump.
  • a fan is associated with the radiator to increase its operating efficiency.
  • a thermostatic valve is generally provided so as to isolate the part of the cooling circuit which contains the radiator during a cold start, during which an excessive cooling of the motor unit thruster is not desired.
  • the thermostatic valve opens depending on the temperature of the circulating water that is warmed by the engine after the start-up period.
  • the fan associated with the radiator may be works to increase the amount of calories taken by the air to the coolant.
  • document 2005/0121242 also discloses energy recovery modules intended to be mounted on a motor vehicle and comprising a plurality of fans connected to an electricity generator for recovering the energy generated by the vehicle. driving the fans during the advancement of the motor vehicle.
  • the present invention therefore aims to overcome this disadvantage.
  • the present invention aims at providing a device which makes it possible to obtain a satisfactory cooling of the powertrain unit, and more generally of all the vehicle components, as well as a recovery of energy in different running ranges. of the vehicle reliably.
  • the subject of the invention is an energy recovery device for a vehicle power unit. automobile, the device comprising at least one fan to be associated with a heat exchanger for cooling a heat transfer fluid of the power train, a fan support nozzle and a motor for driving the fan in rotation.
  • the device further comprises clutch means for transmitting a torque between the drive motor and the fan, and means for regulating the air flow rate transmitted to the fan.
  • the control means allow to obtain a leakage flow so as to obtain reliable operation over time. device and limit the risk of deterioration of the constituent elements.
  • the support nozzle comprises the means for regulating the air flow rate transmitted to the fan.
  • This arrangement is particularly advantageous insofar as the regulation means are arranged directly on the support nozzle, which simplifies the mounting of the device. Indeed, it is not necessary, once the mounted support nozzle, report additional means able to vary the amount of air towards the radiator of the powertrain.
  • the air flow control means transmitted to the fan comprise rotatable flaps.
  • the device comprises an electronic control unit, a sensor for measuring the level of charge of a power supply means, and a sensor for measuring the speed of the motor vehicle.
  • the electronic control unit comprises a memorized map of setpoint values of the position of the clutch means and airflow control means as a function of the level of charge of the power supply means and the speed of the motor vehicle.
  • the electronic control unit comprises a voltage converter.
  • the invention also relates to a motor-drive unit for a motor vehicle comprising an energy recovery device as defined above.
  • the invention relates to a method for energy recovery for a motor vehicle power unit equipped with at least one fan associated with a heat exchanger for cooling a heat transfer fluid of the power train and of a motor for rotating the fan, in which the fan and the motor are coupled, and regulating the air flow under hood of the motor vehicle which is transmitted to the fan to generate electricity.
  • the air flow is regulated by means of movable flaps mounted on a fan support nozzle.
  • the air flow is regulated according to the power generated by the rotation of the fan and recovered by the motor.
  • FIG. 1 schematically illustrates a motor vehicle provided with an energy recovery device according to the invention
  • FIG. 2 represents the different operating steps of the device of FIG. 1.
  • FIG. 1 shows a motor vehicle, referenced 10 as a whole, which comprises an internal combustion engine 12, a radiator 14 consisting of a water / air heat exchanger for cooling the engine, and a device 16 to promote the cooling of the radiator 14, and more generally the engine 12, and also to obtain energy recovery through the air rushing under the hood 17 during the advancement of the vehicle.
  • a motor vehicle referenced 10 as a whole, which comprises an internal combustion engine 12, a radiator 14 consisting of a water / air heat exchanger for cooling the engine, and a device 16 to promote the cooling of the radiator 14, and more generally the engine 12, and also to obtain energy recovery through the air rushing under the hood 17 during the advancement of the vehicle.
  • the device 16, the radiator 14 and the motor 12 are arranged from upstream to downstream, considering the direction of air flow which is conveyed towards these elements, via an input grid 18 located at the level of a shell of a hood 17, during the advance of the vehicle 10.
  • the device 16 essentially comprises a fan 20, a fan support nozzle 22, an electric motor 24 for rotating the fan 20, and an electronic control unit 26 provided in particular for controlling the motor 22.
  • the fan 20 is mounted under the cover 17 via the support nozzle 22, and comprises a hub 28 connected to the motor 24 and blades 30 distributed on the hub uniformly in the circumferential direction. .
  • the hub 28 extends along a horizontal axis 32 assumed horizontal.
  • the nozzle 22 is schematically illustrated here and has a generally conical shape. It also allows the mounting of the inlet grille 18 and the radiator 14 under the hood 17.
  • the device 16 further comprises a clutch means (not shown) J for the transmission of torque between 24 and fan motor 20, and regulating means 34 of the airflow forwarded to the fan 20 after engulfré by the input gate 18.
  • the clutch means may be of the single-disc type.
  • the regulation means 34 comprise movable flaps 36, 38 mounted between the inlet grille 18 and the fan 20.
  • the flaps 36, 38 are therefore mounted upstream of the fan 20, considering the direction of air flow. engulfing by the inlet gate 18 during the advancement of the vehicle 10.
  • the flaps 36, 38 are rotatably mounted on the support nozzle 22 so as to vary the air flow to the fan 20.
  • the flaps 36, 38 are here two in number and mounted substantially midway between the inlet gate 18 and the fan 20, facing one another.
  • the flaps 36, 38 are jointly movable between a rest position in which they form part of the inner wall of the nozzle 22 for conveying an air flow from the inlet grille 18 to the fan 20, and an active position, visible in the figure, in which they allow the escape of a portion of the air flow. In the active position, the flaps 36, 38 extend outwardly from the support nozzle 22 and release two openings 40, 42 whose leakage rate varies according to the degree of opening of the flaps.
  • the position of the clutch means and the regulation means 34 of the air flow are controlled according to the operating conditions of the vehicle 10 determined by the control unit 26.
  • the device 16 is further provided with a temperature sensor capable of detecting the temperature of a heat transfer liquid circulating inside the radiator 14 and intended to cool the engine 12, with a suitable temperature sensor, detecting the ambient ambient temperature, a vehicle speed measuring sensor 10, and a load level sensor of an electrical consumer of the vehicle such as the battery 39.
  • the sensors (not shown) are connected to the control unit 26.
  • control unit 26 includes stored in memory all the material and logistic means for controlling the clutching means and the movement of the flaps 36, 38 of the regulating means 34. in addition to a memorized map of setpoint values of the position of the clutch means and flaps 36, 38 as a function of the temperature of the coolant circulating inside the radiator 14, the outside temperature, the speed of the vehicle 10 , and the charge level of the battery 39.
  • the position of the clutch means and that of the regulation means are thus determined by the control unit 26 as a function of the operating conditions of the motor 12 so as to transmit or not a torque between the fan 20 and the motor 24, and to adjust the air flow conveyed towards the fan 20.
  • control unit 26 receives as input data representative of the operation of the vehicle which are:
  • V veh the speed of the vehicle (in km / h)
  • a first step 50 consists in determining, according to the aforementioned representative data, whether it is necessary to cool the motor 12.
  • the control unit 26 determines that the cooling is not satisfactory, it controls the clutch means and the motor 24 so as to allow the transmission of a torque between it and the fan 20.
  • the control unit 26 also controls the regulating means 34 for positioning the flaps 36, 38 in the rest position.
  • Mode 1 Such a mode of operation of the device 16 is called Mode 1.
  • the electric drive motor of the fan 20 is supplied with current via the battery 39, via the cables 44 (FIG. 1).
  • control unit 26 proceeds to the next step 52 and checks whether the speed of the motor vehicle is above a predetermined speed and whether the charge level of the battery 39 is below a pre-established charge level.
  • the speed can for example be 90 km / h and the load level of 50% of the maximum load level.
  • control unit 26 determines that one of these two conditions is not respected, then it controls the means clutch so as to move into a disengaged position, in which no torque is transmitted between the fan 20 and the motor 24. In this operating mode, the motor 24 is not supplied with current. The flaps 36, 38 are held in their rest position.
  • the device 16 then operates in a second mode (Mode 2) in which the fan 20 is disengaged from the motor 24 so as to minimize the pressure drops induced during the rotational drive of the fan 20 by the rushing air at level of the entrance gate 18.
  • Mode 2 a second mode in which the fan 20 is disengaged from the motor 24 so as to minimize the pressure drops induced during the rotational drive of the fan 20 by the rushing air at level of the entrance gate 18.
  • control unit 26 detects that the two abovementioned conditions are met, it then controls the operation of the device 16 in a third mode (Mode 3) in which the clutching means are again in a geared position. so as to enhance the hood air rushing at the input gate 18 and causing the motor 24 to rotate.
  • Mode 3 the third mode in which the clutching means are again in a geared position.
  • the fan 20 then becomes an electric generator.
  • the electrical energy thus obtained is recovered by the motor 24.
  • the generated electric current is then sent to the control unit 26, via the cables 44.
  • the control unit 26 comprises a voltage converter (not shown ), and feeds the battery 39.
  • a voltage converter not shown
  • control unit 26 controls the opening of the flaps 36, 38 of the regulating means 34.
  • the opening of the flaps 36, 38 is controlled so that the power generated by the fan 20 is equal to the power recoverable by the motor 24.
  • the control unit 26 can also control the opening of the flaps 36, 38 when the rotational speed of the fan 24 has reached its maximum operating speed imposed by mechanical stresses.
  • the amount of air conveyed towards the fan 20 can be adapted so as to obtain a good compromise between the energy recovery and the reliability of the device 16.
  • the control unit 26 thus allows the rotational movement of the shutters. 36, 38 and obtaining a controllable leak rate to limit the amount of air transmitted to the fan 20.
  • the opening of the flaps 36, 38 of the regulation means 34 makes it possible to optimize the quantity of air sent to the fan 20, so as to obtain a satisfactory compromise between the mechanical strength of the device 16 and the kinetic energy recovery of the air mass rushing under the hood 17.
  • control unit 26 controls the clutch means to allow the transmission of a torque between the fan 20 and the motor 24, without supplying current to said motor 24.
  • the device 16 thus operates identically to Mode 3. Under these conditions, the air flow rate transmitted to the radiator 14 is limited, which accelerates the rise in temperature of the coolant. and therefore the engine 12.
  • radiator and having good reliability of operation, to obtain a kinetic energy recovery during the advancement of the motor vehicle, but also to promote the rise in temperature of the powertrain during a cold start of the vehicle.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

Energy recovery device for the power unit of an automobile, including at least one fan (20) to be associated with a heat exchanger in order to cool a liquid heating medium of the power unit, a supporting nozzle (22) for the fan and a motor (24) to rrotating the fan, characterized in that it also includes clutch means for transmitting a torque between the drive motor and the fan, and regulating means (34) of the air flow to the fan.

Description

Dispositif et procédé de récupération d'énergie pour moteur à combustion interne de véhicule automobile. Device and method for energy recovery for an internal combustion engine of a motor vehicle.
La présente invention concerne le domaine automobile, et plus particulièrement la récupération d'énergie à partir de l'entraînement en rotation d'un ventilateur qui est généralement associé à un échangeur de chaleur pour moteur à combustion interne, ou tout autre motorisation ayant un système de refroidissement (pile à combustible, machine électrique).The present invention relates to the automotive field, and more particularly to the recovery of energy from the rotary drive of a fan which is generally associated with a heat exchanger for an internal combustion engine, or any other engine having a system cooling (fuel cell, electric machine).
Un moteur d'entraînement à combustion interne, ou tout autre motorisation ayant un système de refroidissement, est généralement refroidi par la mise en circulation d'un liquide caloporteur, en pratique de l'eau mélangée avec un anti-gel, qui traverse les principales parties du moteur qu'il convient de refroidir.An internal combustion drive motor, or any other motor having a cooling system, is generally cooled by circulating a coolant, in practice water mixed with an antifreeze, which passes through the main parts of the engine to be cooled.
Le circuit de refroidissement comprend essentiellement une pompe de circulation entraînée par le moteur et un radiateur constitué d'un échangeur de chaleur eau/air capable de refroidir l 'eau mise en circulation par la pompe. Classiquement, un ventilateur est associé au radiateur pour accroître son efficacité de fonctionnement.The cooling circuit essentially comprises a circulation pump driven by the engine and a radiator consisting of a water / air heat exchanger capable of cooling the water circulated by the pump. Conventionally, a fan is associated with the radiator to increase its operating efficiency.
De manière à optimiser l'efficacité de fonctionnement du groupe moto-propulseur, une vanne thermostatique est généralement prévue de façon à isoler la partie du circuit de refroidissement qui contient le radiateur pendant un démarrage à froid, durant lequel un refroidissement excessif du groupe moto-propulseur n'est pas souhaité. Progressivement, la vanne thermostatique s'ouvre en fonction de la température de l'eau mise en circulation qui est réchauffée par le moteur après la période de démarrage.In order to optimize the operating efficiency of the power unit, a thermostatic valve is generally provided so as to isolate the part of the cooling circuit which contains the radiator during a cold start, during which an excessive cooling of the motor unit thruster is not desired. Gradually, the thermostatic valve opens depending on the temperature of the circulating water that is warmed by the engine after the start-up period.
Dans ce but, dans certaines conditions de fonctionnement du groupe moto-propulseur, notamment dans des phases de roulage urbain embouteillées, le ventilateur associé au radiateur peut-être mis en marche de manière à augmenter la quantité de calories prélevées par l'air au liquide caloporteur.For this purpose, under certain operating conditions of the powertrain, particularly in congested urban driving phases, the fan associated with the radiator may be works to increase the amount of calories taken by the air to the coolant.
Toutefois, lorsque le véhicule automobile roule à une vitesse relativement élevée et que la température du liquide caloporteur est basse, l'entraînement en rotation du ventilateur par un moteur ne présente plus de véritable intérêt.However, when the motor vehicle is traveling at a relatively high speed and the temperature of the coolant is low, the rotation of the fan by a motor is no longer of any real interest.
Ainsi, il est possible d'utiliser le ventilateur en vue d'une récupération de l'énergie cinétique acquis par une masse d'air s'engouffrant sous le capot du véhicule. C'est ainsi que la demande de brevet US2003/0140643 prévoit différentes phases de pilotage de ventilateurs en fonction de la vitesse du véhicule automobile.Thus, it is possible to use the fan to recover the kinetic energy acquired by a mass of air rushing under the hood of the vehicle. Thus, the patent application US2003 / 0140643 provides different phases of fan control according to the speed of the motor vehicle.
Dans ce domaine, on connaît encore par le document 2005/0121242, des modules de récupération d'énergie destinés à être montés sur un véhicule automobile et comportant une pluralité de ventilateurs reliés à un générateur d'électricité pour récupérer l'énergie générée par l'entraînement des ventilateurs lors de l'avancement du véhicule automobile.In this field, document 2005/0121242 also discloses energy recovery modules intended to be mounted on a motor vehicle and comprising a plurality of fans connected to an electricity generator for recovering the energy generated by the vehicle. driving the fans during the advancement of the motor vehicle.
Ces deux dispositifs de l'art antérieur ont notamment pour inconvénient de ne pas permettre une récupération d'énergie qui soit particulièrement adaptée selon les différentes conditions de roulage du véhicule.These two devices of the prior art have the particular drawback of not allowing energy recovery that is particularly suitable for different driving conditions of the vehicle.
La présente invention a donc pour but de remédier à cet inconvénient.The present invention therefore aims to overcome this disadvantage.
Plus particulièrement, la présente invention vise à prévoir un dispositif qui permet d'obtenir un refroidissement satisfaisant du groupe moto-propulseur, et plus généralement de l'ensemble des organes du véhicule, ainsi qu'une récupération d' énergie dans différentes plages de roulage du véhicule de manière fiable.More particularly, the present invention aims at providing a device which makes it possible to obtain a satisfactory cooling of the powertrain unit, and more generally of all the vehicle components, as well as a recovery of energy in different running ranges. of the vehicle reliably.
Selon un premier aspect, l'invention a pour objet un dispositif de récupération d'énergie pour groupe moto-propulseur de véhicule automobile, le dispositif comprenant au moins un ventilateur destiné à être associé à un échangeur de chaleur pour le refroidissement d'un fluide caloporteur du groupe moto-propulseur, une buse de support du ventilateur et un moteur pour l'entraînement en rotation du ventilateur.According to a first aspect, the subject of the invention is an energy recovery device for a vehicle power unit. automobile, the device comprising at least one fan to be associated with a heat exchanger for cooling a heat transfer fluid of the power train, a fan support nozzle and a motor for driving the fan in rotation.
Selon une caractéristique générale de l'invention, le dispositif comprend en outre des moyens d'embrayage pour la transmission d'un couple entre le moteur d'entraînement et le ventilateur, et des moyens de régulation du débit d'air transmis au ventilateur.According to a general characteristic of the invention, the device further comprises clutch means for transmitting a torque between the drive motor and the fan, and means for regulating the air flow rate transmitted to the fan.
Avec un tel dispositif, il devient notamment possible d'utiliser le ventilateur pour procéder au refroidissement du groupe moto- propulseur mais également pour obtenir une récupération d'énergie qui est optimisée en fonction des conditions de roulage du véhicule. En effet, si l'énergie récupérée par le moteur devient supérieure à l'énergie maximale récupérable imposée par ses caractéristiques techniques, les moyens de régulation permettent l'obtention d'un débit de fuite de manière à obtenir un fonctionnement fiable dans le temps du dispositif et limiter le risque de détérioration des éléments le constituant.With such a device, it becomes possible in particular to use the fan to proceed to the cooling of the power unit but also to obtain energy recovery which is optimized according to the driving conditions of the vehicle. Indeed, if the energy recovered by the motor becomes greater than the maximum recoverable energy imposed by its technical characteristics, the control means allow to obtain a leakage flow so as to obtain reliable operation over time. device and limit the risk of deterioration of the constituent elements.
Dans un mode de réalisation, la buse de support comprend les moyens de régulation du débit d'air transmis au ventilateur.In one embodiment, the support nozzle comprises the means for regulating the air flow rate transmitted to the fan.
Cette disposition est particulièrement avantageuse dans la mesure où les moyens de régulation sont disposés directement sur la buse de support, ce qui simplifie le montage du dispositif. En effet, il n'est pas nécessaire, une fois la buse de support montée, de rapporter des moyens additionnels aptes à faire varier la quantité d'air se dirigeant vers le radiateur du groupe moto-propulseur.This arrangement is particularly advantageous insofar as the regulation means are arranged directly on the support nozzle, which simplifies the mounting of the device. Indeed, it is not necessary, once the mounted support nozzle, report additional means able to vary the amount of air towards the radiator of the powertrain.
Dans un mode de réalisation, les moyens de régulation du débit d'air transmis au ventilateur comprennent des volets mobiles en rotation. Préférentiellement, le dispositif comprend une unité de contrôle électronique, un capteur de mesure du niveau de charge d'un moyen d'alimentation en énergie, et un capteur de mesure de la vitesse du véhicule automobile.In one embodiment, the air flow control means transmitted to the fan comprise rotatable flaps. Preferably, the device comprises an electronic control unit, a sensor for measuring the level of charge of a power supply means, and a sensor for measuring the speed of the motor vehicle.
Avantageusement, l'unité de contrôle électronique comprend une cartographie mémorisée de valeurs de consigne de la position des moyens d'embrayage et des moyens de régulation du débit d' air en fonction du niveau de charge du moyen d'alimentation en énergie et de la vitesse du véhicule automobile.Advantageously, the electronic control unit comprises a memorized map of setpoint values of the position of the clutch means and airflow control means as a function of the level of charge of the power supply means and the speed of the motor vehicle.
Dans un mode de réalisation, l'unité de contrôle électronique comprend un convertisseur de tension.In one embodiment, the electronic control unit comprises a voltage converter.
Selon un second aspect, l'invention a également pour objet un groupe moto-propulseur pour véhicule automobile comprenant un dispositif de récupération d'énergie tel que défini précédemment.According to a second aspect, the invention also relates to a motor-drive unit for a motor vehicle comprising an energy recovery device as defined above.
Enfin, l'invention concerne un procédé de récupération d' énergie pour groupe moto-propulseur de véhicule automobile équipé d'au moins un ventilateur associé à un échangeur de chaleur pour le refroidissement d'un fluide caloporteur du groupe moto-propulseur et d'un moteur pour l'entraînement en rotation du ventilateur, dans lequel on accouple le ventilateur et le moteur, et on régule le débit d'air sous capot du véhicule automobile qui est transmis au ventilateur afin de générer de l'électricité.Finally, the invention relates to a method for energy recovery for a motor vehicle power unit equipped with at least one fan associated with a heat exchanger for cooling a heat transfer fluid of the power train and of a motor for rotating the fan, in which the fan and the motor are coupled, and regulating the air flow under hood of the motor vehicle which is transmitted to the fan to generate electricity.
Avantageusement, on régule le débit d'air par l'intermédiaire de volets mobiles montés sur une buse de support du ventilateur.Advantageously, the air flow is regulated by means of movable flaps mounted on a fan support nozzle.
Dans un mode de mise en oeuvre, on régule le débit d'air en fonction de la puissance générée par la rotation du ventilateur et récupérée par le moteur.In one embodiment, the air flow is regulated according to the power generated by the rotation of the fan and recovered by the motor.
La présente invention sera mieux comprise à la lecture de la description détaillée d'un mode de réalisation pris à titre d'exemple nullement limitatif et illustré par les dessins annexés, sur lesquels : - la figure 1 illustre schématiquement un véhicule automobile pourvu d'un dispositif de récupération d'énergie selon l'invention, etThe present invention will be better understood on reading the detailed description of an embodiment taken by way of non-limiting example and illustrated by the appended drawings, in which: FIG. 1 schematically illustrates a motor vehicle provided with an energy recovery device according to the invention, and
- la figure 2 représente les différentes étapes de fonctionnement du dispositif de la figure 1.FIG. 2 represents the different operating steps of the device of FIG. 1.
Sur la figure 1 , on a représenté un véhicule automobile, référencé 10 dans son ensemble, qui comprend un moteur 12 à combustion interne, un radiateur 14 constitué d'un échangeur de chaleur eau/air pour le refroidissement du moteur, et un dispositif 16 permettant de favoriser le refroidissement du radiateur 14, et plus généralement du moteur 12, et d'obtenir également une récupération d'énergie grâce à l'air s'engouffrant sous le capot 17 lors de l'avancement du véhicule.FIG. 1 shows a motor vehicle, referenced 10 as a whole, which comprises an internal combustion engine 12, a radiator 14 consisting of a water / air heat exchanger for cooling the engine, and a device 16 to promote the cooling of the radiator 14, and more generally the engine 12, and also to obtain energy recovery through the air rushing under the hood 17 during the advancement of the vehicle.
Le dispositif 16, le radiateur 14 et le moteur 12 sont disposés d' amont en aval, en considérant le sens de circulation de l'air qui est véhiculé en direction de ces éléments, via une grille d' entrée 18 située au niveau d'une calandre d'un capot 17, lors de l'avancement du véhicule 10.The device 16, the radiator 14 and the motor 12 are arranged from upstream to downstream, considering the direction of air flow which is conveyed towards these elements, via an input grid 18 located at the level of a shell of a hood 17, during the advance of the vehicle 10.
Le dispositif 16 comporte essentiellement un ventilateur 20, une buse 22 de support du ventilateur, un moteur 24 électrique pour l'entraînement en rotation du ventilateur 20, et une unité de contrôle 26 électronique prévue notamment pour le pilotage du moteur 22.The device 16 essentially comprises a fan 20, a fan support nozzle 22, an electric motor 24 for rotating the fan 20, and an electronic control unit 26 provided in particular for controlling the motor 22.
De manière connue en soi, le ventilateur 20 est monté sous le capot 17 par l'intermédiaire de la buse 22 de support, et comporte un moyeu 28 relié au moteur 24 et des pales 30 réparties sur le moyeu de manière uniforme dans le sens circonférentiel. Le moyeu 28 s'étend suivant un axe 32 longitudinal supposé horizontal. La buse 22 est illustrée ici de manière schématique et présente une forme générale conique. Elle permet également le montage de la grille d'entrée 18 et du radiateur 14 sous le capot 17. Le dispositif 16 comporte encore des moyens d'embrayage (non représentés)Jpour la transmission d'un couple entre le moteur 24 et le ventilateur 20, et des moyens de régulation 34 du débit d'air transmis au ventilateur 20 après s'être engouffré par la grille d'entrée 18. Les moyens d'embrayage peuvent être du type monodisque.In a manner known per se, the fan 20 is mounted under the cover 17 via the support nozzle 22, and comprises a hub 28 connected to the motor 24 and blades 30 distributed on the hub uniformly in the circumferential direction. . The hub 28 extends along a horizontal axis 32 assumed horizontal. The nozzle 22 is schematically illustrated here and has a generally conical shape. It also allows the mounting of the inlet grille 18 and the radiator 14 under the hood 17. The device 16 further comprises a clutch means (not shown) J for the transmission of torque between 24 and fan motor 20, and regulating means 34 of the airflow forwarded to the fan 20 after engulfré by the input gate 18. The clutch means may be of the single-disc type.
Les moyens de régulation 34 comportent des volets 36, 38 mobiles montés entre la grille d'entrée 18 et le ventilateur 20. Les volets 36, 38 sont donc montés en amont du ventilateur 20, en considérant le sens de circulation de l'air s'engouffrant par la grille d'entrée 18 lors de l'avancement du véhicule 10.The regulation means 34 comprise movable flaps 36, 38 mounted between the inlet grille 18 and the fan 20. The flaps 36, 38 are therefore mounted upstream of the fan 20, considering the direction of air flow. engulfing by the inlet gate 18 during the advancement of the vehicle 10.
Les volets 36, 38 sont montés à rotation sur la buse 22 de support de façon à faire varier le débit d'air envoyé au ventilateur 20. Les volets 36, 38 sont ici au nombre de deux et montés sensiblement à mi-distance entre la grille d'entrée 18 et le ventilateur 20, en regard l'un par rapport à l 'autre.The flaps 36, 38 are rotatably mounted on the support nozzle 22 so as to vary the air flow to the fan 20. The flaps 36, 38 are here two in number and mounted substantially midway between the inlet gate 18 and the fan 20, facing one another.
Les volets 36, 38 sont déplaçables conjointement entre une position de repos dans laquelle ils forment en partie la paroi intérieure de la buse 22 permettant l'acheminement d'un flux d'air de la grille d'entrée 18 vers le ventilateur 20, et une position active, visible sur la figure, dans laquelle ils permettent l'échappement d'une partie du flux d'air. Dans la position active, les volets 36, 38 s' étendent vers l'extérieur de la buse 22 de support et libèrent deux ouvertures 40, 42 dont le débit de fuite varie en fonction du degré d'ouverture des volets.The flaps 36, 38 are jointly movable between a rest position in which they form part of the inner wall of the nozzle 22 for conveying an air flow from the inlet grille 18 to the fan 20, and an active position, visible in the figure, in which they allow the escape of a portion of the air flow. In the active position, the flaps 36, 38 extend outwardly from the support nozzle 22 and release two openings 40, 42 whose leakage rate varies according to the degree of opening of the flaps.
Bien entendu, il est possible de prévoir un nombre différent de volets ou encore de prévoir des volets mobiles en translation par rapport à la buse 22 de support.Of course, it is possible to provide a different number of flaps or to provide flaps movable in translation relative to the nozzle 22 support.
La position des moyens d'embrayage et des moyens de régulation 34 du débit d'air sont commandés en fonction des conditions de fonctionnement du véhicule 10 déterminées par l'unité de contrôle 26.The position of the clutch means and the regulation means 34 of the air flow are controlled according to the operating conditions of the vehicle 10 determined by the control unit 26.
A cet égard, le dispositif 16 est encore pourvu d'un capteur de température apte à détecter la température d'un liquide caloporteur circulant à l 'intérieur du radiateur 14 et destiné à refroidir le moteur 12, d'un capteur de température apte , à détecter la température ambiante extérieure, d'un capteur de mesure de vitesse du véhicule 10, et d'un capteur d'un niveau de charge d'un consommateur électrique du véhicule tel que la batterie 39. Les capteurs (non représentés) sont reliés à l'unité de contrôle 26.In this respect, the device 16 is further provided with a temperature sensor capable of detecting the temperature of a heat transfer liquid circulating inside the radiator 14 and intended to cool the engine 12, with a suitable temperature sensor, detecting the ambient ambient temperature, a vehicle speed measuring sensor 10, and a load level sensor of an electrical consumer of the vehicle such as the battery 39. The sensors (not shown) are connected to the control unit 26.
Pour procéder au contrôle de fonctionnement du dispositif 16, l'unité de contrôle 26 comprend stockés en mémoire tous les moyens matériels et logistiques pour commander les moyens d'embrayage et le déplacement des volets 36, 38 des moyens de régulation 34. Elle comprend en outre une cartographie mémorisée de valeurs de consigne de la position des moyens d'embrayage et des volets 36, 38 en fonction de la température du liquide caloporteur circulant à l'intérieur du radiateur 14, de la température extérieure, de la vitesse du véhicule 10, et du niveau de charge de la batterie 39.To carry out the functional check of the device 16, the control unit 26 includes stored in memory all the material and logistic means for controlling the clutching means and the movement of the flaps 36, 38 of the regulating means 34. in addition to a memorized map of setpoint values of the position of the clutch means and flaps 36, 38 as a function of the temperature of the coolant circulating inside the radiator 14, the outside temperature, the speed of the vehicle 10 , and the charge level of the battery 39.
La position des moyens d'embrayage et celle des moyens de régulation sont donc déterminées par l'unité de contrôle 26 en fonction de conditions de fonctionnement du moteur 12 de manière à transmettre ou non un couple entre le ventilateur 20 et, le moteur 24, et à ajuster le débit d'air véhiculé en direction du ventilateur 20.The position of the clutch means and that of the regulation means are thus determined by the control unit 26 as a function of the operating conditions of the motor 12 so as to transmit or not a torque between the fan 20 and the motor 24, and to adjust the air flow conveyed towards the fan 20.
En référence à la figure 2, on va maintenant décrire les principales, étapes mises en œuvre au sein de l'unité de contrôle 26 du dispositif 16 pour obtenir un refroidissement satisfaisant du moteur 12 et une récupération d'énergie. Comme mentionné précédemment, l'unité de contrôle 26 reçoit en entrée des données représentatives du fonctionnement du véhicule qui sont :Referring to Figure 2, we shall now describe the main, steps implemented in the control unit 26 of the device 16 to obtain satisfactory cooling of the motor 12 and an energy recovery. As mentioned previously, the control unit 26 receives as input data representative of the operation of the vehicle which are:
- Tmot : la température du liquide caloporteur destiné à refroidir le moteur 12,- T word : the temperature of the coolant for cooling the motor 12,
- Tamb : la température à l'extérieur du véhicule automobile,- T amb : the temperature outside the motor vehicle,
- Vveh : la vitesse du véhicule (en km/h), et- V veh : the speed of the vehicle (in km / h), and
- ^charge ' le niveau de charge de la batterie 39 du véhicule. Une première étape 50 consiste à déterminer en fonction des données représentatives précitées s'il est nécessaire de refroidir le moteur 12. Lorsque l'unité de contrôle 26 détermine que le refroidissement n'est pas satisfaisant, elle commande les moyens d'embrayage et le moteur 24 de manière à permettre la transmission d'un couple entre celui-ci et le ventilateur 20. L'unité de contrôle 26 commande également les moyens de régulation 34 pour positionner les volets 36, 38 en position de repos.- ^ char g e 'charge level of the battery 39 of the vehicle. A first step 50 consists in determining, according to the aforementioned representative data, whether it is necessary to cool the motor 12. When the control unit 26 determines that the cooling is not satisfactory, it controls the clutch means and the motor 24 so as to allow the transmission of a torque between it and the fan 20. The control unit 26 also controls the regulating means 34 for positioning the flaps 36, 38 in the rest position.
Ainsi, on augmente la quantité d' air envoyée vers le radiateur 14 et on accroît l'effet de refroidissement du liquide caloporteur du moteur 12 par ventilation naturelle. Un tel mode de fonctionnement du dispositif 16 est appelé Mode 1. Dans ce mode, le moteur 24 électrique d' entraînement du ventilateur 20 est alimenté en courant par l'intermédiaire de la batterie 39, via les câbles 44 (figure 1 ).Thus, it increases the amount of air sent to the radiator 14 and increases the cooling effect of the heat transfer liquid of the engine 12 by natural ventilation. Such a mode of operation of the device 16 is called Mode 1. In this mode, the electric drive motor of the fan 20 is supplied with current via the battery 39, via the cables 44 (FIG. 1).
Si le refroidissement du moteur est satisfaisant, alors l'unité de contrôle 26 passe à l'étape suivante 52 et vérifie si la vitesse du véhicule automobile est supérieure à une vitesse prédéterminée et si le niveau de charge de la batterie 39 est en dessous d'un niveau de charge préétabli. La vitesse peut par exemple être de 90 km/h et le niveau de charge de 50% du niveau de charge maximal.If the engine cooling is satisfactory, then the control unit 26 proceeds to the next step 52 and checks whether the speed of the motor vehicle is above a predetermined speed and whether the charge level of the battery 39 is below a pre-established charge level. The speed can for example be 90 km / h and the load level of 50% of the maximum load level.
Si l'unité de contrôle 26 détermine qu'une de ces deux conditions n'est pas respectée, elle commande alors les moyens d'embrayage de manière à passer dans une position débrayée, dans laquelle aucun couple n'est transmis entre le ventilateur 20 et le moteur 24. Dans ce mode de fonctionnement, le moteur 24 n'est pas alimenté en courant. Les volets 36, 38 sont maintenus dans leur position de repos.If the control unit 26 determines that one of these two conditions is not respected, then it controls the means clutch so as to move into a disengaged position, in which no torque is transmitted between the fan 20 and the motor 24. In this operating mode, the motor 24 is not supplied with current. The flaps 36, 38 are held in their rest position.
Le dispositif 16 fonctionne alors selon un second mode (Mode 2) dans lequel le ventilateur 20 est débrayé du moteur 24 de manière à minimiser les pertes de charge induites lors de l'entraînement en rotation du ventilateur 20 par l'air s'engouffrant au niveau de la grille d'entrée 18.The device 16 then operates in a second mode (Mode 2) in which the fan 20 is disengaged from the motor 24 so as to minimize the pressure drops induced during the rotational drive of the fan 20 by the rushing air at level of the entrance gate 18.
Au contraire, si l 'unité de contrôle 26 détecte que les deux conditions précitées sont respectées, elle commande alors le fonctionnement du dispositif 16 selon un troisième mode (Mode 3) dans lequel les moyens d'embrayage sont à nouveau dans une position embrayée de manière à valoriser l' air sous capot s'engouffrant au niveau de la grille d'entrée 18 et entraînant en rotation le moteur 24. Lors du passage du second mode au troisième mode, les volets 36, 38 restent dans leur position de repos.On the other hand, if the control unit 26 detects that the two abovementioned conditions are met, it then controls the operation of the device 16 in a third mode (Mode 3) in which the clutching means are again in a geared position. so as to enhance the hood air rushing at the input gate 18 and causing the motor 24 to rotate. During the transition from the second mode to the third mode, the flaps 36, 38 remain in their rest position.
Dans ce mode de fonctionnement, le ventilateur 20 devient alors un générateur électrique. L'énergie électrique ainsi obtenue étant récupérée par le moteur 24. Le courant électrique généré est ensuite acheminé à l'unité de contrôle 26, par l'intermédiaire des câbles 44. L'unité de contrôle 26 comporte un convertisseur de tension (non représenté), et alimente la batterie 39. Bien entendu, on conçoit aisément qu'il est possible d'alimenter d'autres consommateurs électriques du véhicule avec l'énergie récupérée.In this operating mode, the fan 20 then becomes an electric generator. The electrical energy thus obtained is recovered by the motor 24. The generated electric current is then sent to the control unit 26, via the cables 44. The control unit 26 comprises a voltage converter (not shown ), and feeds the battery 39. Of course, it is easily understood that it is possible to supply other electrical consumers of the vehicle with the recovered energy.
De manière à optimiser le fonctionnement du dispositif 16 dans ce troisième mode, lorsque la puissance générée par la rotation du ventilateur 20 est supérieure à la puissance maximale récupérable par le moteur 24, l'unité de contrôle 26 commande l'ouverture des volets 36, 38 des moyens de régulation 34.In order to optimize the operation of the device 16 in this third mode, when the power generated by the rotation of the fan 20 is greater than the maximum power recoverable by the motor 24, the control unit 26 controls the opening of the flaps 36, 38 of the regulating means 34.
Dans ce cas, l'ouverture des volets 36, 38 est commandée de façon que la puissance générée par le ventilateur 20 soit égale à la puissance récupérable par le moteur 24. D'une manière similaire, l'unité de contrôle 26 peut également commander l'ouverture des volets 36, 38 lorsque la vitesse de rotation du ventilateur 24 a atteint sa vitesse de fonctionnement maximale imposée par des contraintes mécaniques.In this case, the opening of the flaps 36, 38 is controlled so that the power generated by the fan 20 is equal to the power recoverable by the motor 24. In a similar manner, the control unit 26 can also control the opening of the flaps 36, 38 when the rotational speed of the fan 24 has reached its maximum operating speed imposed by mechanical stresses.
Ainsi, la quantité d'air véhiculé en direction du ventilateur 20 peut être adaptée de manière à obtenir un bon compromis entre la récupération d'énergie et la fiabilité du dispositif 16. L'unité de contrôle 26 permet donc le déplacement en rotation des volets 36, 38 et l'obtention d'un débit de fuite contrôlable afin de limiter la quantité d'air transmise vers le ventilateur 20.Thus, the amount of air conveyed towards the fan 20 can be adapted so as to obtain a good compromise between the energy recovery and the reliability of the device 16. The control unit 26 thus allows the rotational movement of the shutters. 36, 38 and obtaining a controllable leak rate to limit the amount of air transmitted to the fan 20.
En d'autres termes, l'ouverture des volets 36, 38 des moyens de régulation 34 permet d'optimiser la quantité d'air envoyée vers le ventilateur 20, de manière à obtenir un compromis satisfaisant entre la résistance mécanique du dispositif 16 et la récupération d'énergie cinétique de la masse d'air s'engouffrant sous le capot 17.In other words, the opening of the flaps 36, 38 of the regulation means 34 makes it possible to optimize the quantity of air sent to the fan 20, so as to obtain a satisfactory compromise between the mechanical strength of the device 16 and the kinetic energy recovery of the air mass rushing under the hood 17.
Par ailleurs, il peut également être envisageable de prévoir, lors d'un démarrage à froid du véhicule 10, que l'unité de contrôle 26 commande les moyens d'embrayage de manière à permettre la transmission d'un couple entre le ventilateur 20 et le moteur 24, sans alimenter en courant ledit moteur 24. Le dispositif 16 fonctionne ainsi de façon identique au Mode 3. Dans ces conditions, le débit d'air transmis au radiateur 14 est limité, ce qui accélère la montée en température du liquide caloporteur et donc du moteur 12.Moreover, it may also be possible to provide, during a cold start of the vehicle 10, the control unit 26 controls the clutch means to allow the transmission of a torque between the fan 20 and the motor 24, without supplying current to said motor 24. The device 16 thus operates identically to Mode 3. Under these conditions, the air flow rate transmitted to the radiator 14 is limited, which accelerates the rise in temperature of the coolant. and therefore the engine 12.
Grâce à l'invention, on obtient donc un dispositif utilisant un ventilateur traditionnellement utilisé pour le refroidissement du χχ R2008/050405Thanks to the invention, a device using a fan traditionally used for cooling the χχ R2008 / 050405
radiateur et présentant une bonne fiabilité de fonctionnement, pour obtenir une récupération d'énergie cinétique lors de l'avancement du véhicule automobile, mais également pour favoriser la montée en température du groupe moto-propulseur lors d'un démarrage à froid du véhicule. radiator and having good reliability of operation, to obtain a kinetic energy recovery during the advancement of the motor vehicle, but also to promote the rise in temperature of the powertrain during a cold start of the vehicle.

Claims

REVENDICATIONS
1 -Dispositif de récupération d'énergie pour groupe moto- propulseur de véhicule automobile, le dispositif comprenant au moins un ventilateur (20) destiné à être associé à un échangeur de chaleur pour le refroidissement d'un fluide caloporteur du groupe moto- propulseur, une buse (22) de support du ventilateur, et un moteur (24) pour l'entraînement en rotation du ventilateur, caractérisé en ce qu'il comprend en outre des moyens d'embrayage pour la transmission d'un couple entre le moteur d'entraînement et le ventilateur, et des moyens de régulation (34) du débit d'air transmis au ventilateur.1 -Energy recovery device for a power unit for a motor vehicle, the device comprising at least one fan (20) intended to be associated with a heat exchanger for cooling a heat transfer fluid of the power unit, a nozzle (22) for supporting the fan, and a motor (24) for rotating the fan, characterized in that it further comprises clutch means for transmitting a torque between the fan motor drive and the fan, and regulating means (34) of the air flow transmitted to the fan.
2-Dispositif selon la revendication 1 , dans lequel la buse (22) de support comprend les moyens de régulation (34) du débit d'air.2-Device according to claim 1, wherein the nozzle (22) support comprises the regulating means (34) of the air flow.
3-Dispositif selon la revendication 1 ou 2, dans lequel les moyens de régulation (34) du débit d'air comprennent des volets (36) mobiles en rotation.3-Device according to claim 1 or 2, wherein the regulating means (34) of the air flow comprise flaps (36) movable in rotation.
4-Dispositif selon l'une quelconque des revendications précédentes, comprenant une unité de contrôle (26) électronique, un capteur de mesure du niveau de charge d'un moyen d'alimentation (38) en énergie, et un capteur de mesure de " la vitesse du véhicule automobile.4-Device according to any one of the preceding claims, comprising an electronic control unit (26), a sensor for measuring the level of charge of a power supply means (38), and a measurement sensor of " the speed of the motor vehicle.
5-Dispositif selon la revendication 4, dans lequel l'unité de contrôle (26) électronique comprend une cartographie mémorisée de valeurs de consigne de la position des moyens d'embrayage et des moyens de régulation (34) du débit d'air en fonction du niveau de charge du moyen d' alimentation (38) en énergie et de la vitesse du véhicule automobile.5-Device according to claim 4, wherein the electronic control unit (26) comprises a memorized map of set values of the position of the clutch means and the regulation means (34) of the air flow in function the charge level of the power supply means (38) and the speed of the motor vehicle.
6-Dispositif selon la revendication 4 ou 5, dans lequel l'unité de contrôle (26) électronique comprend un convertisseur de tension. 7-Groupe moto-propulseur pour véhicule automobile comprenant un échangeur de chaleur et un dispositif de récupération d'énergie selon l'une quelconque des revendications précédentes.6-Device according to claim 4 or 5, wherein the electronic control unit (26) comprises a voltage converter. 7-Motor-propulsion unit for a motor vehicle comprising a heat exchanger and an energy recovery device according to any one of the preceding claims.
8-Procédé de récupération d'énergie pour groupe moto- propulseur de véhicule automobile équipé d' au moins un ventilateur associé à un échangeur de chaleur pour le refroidissement d'un fluide caloporteur du groupe moto-propulseur et d'un moteur pour l'entraînement en rotation du ventilateur, caractérisé en ce qu'on accouple le ventilateur et le moteur, et en ce qu'on régule le débit d'air sous capot du véhicule automobile qui est transmis au ventilateur afin de générer de l'électricité.8-Energy recovery method for motor vehicle power unit equipped with at least one fan associated with a heat exchanger for cooling a heat transfer fluid of the power train and a motor for the rotational drive of the fan, characterized in that couples the fan and the motor, and in that regulates the air flow under hood of the motor vehicle that is transmitted to the fan to generate electricity.
9-Procédé selon la revendication 8, dans lequel on régule le débit d'air par l'intermédiaire de volets mobiles montés sur une buse de support du ventilateur.9-Process according to claim 8, wherein the flow of air is regulated by means of movable flaps mounted on a fan support nozzle.
10-Procédé selon la revendication 8 ou 9, dans lequel on régule le débit d'air en fonction de la puissance générée par la rotation du ventilateur et récupérée par le moteur. 10-Process according to claim 8 or 9, wherein the air flow rate is regulated according to the power generated by the rotation of the fan and recovered by the engine.
PCT/FR2008/050405 2007-03-26 2008-03-11 Energy recovery device and method for the internal combustion engine of an automobile WO2008129190A1 (en)

Applications Claiming Priority (2)

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FR0754037 2007-03-26
FR0754037A FR2914233B1 (en) 2007-03-26 2007-03-26 DEVICE AND METHOD FOR RECOVERING ENERGY FOR INTERNAL COMBUSTION ENGINE OF MOTOR VEHICLE.

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WO2021009051A1 (en) * 2019-07-12 2021-01-21 Jaguar Land Rover Limited Active vane control system and method
CN115352266A (en) * 2022-09-06 2022-11-18 南京十里文化有限公司 Wind power generation application system and application method in automobile driving process

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FR2941894B1 (en) * 2009-02-06 2012-07-20 Peugeot Citroen Automobiles Sa DEVICE FOR PROTECTING A COOLING COMPONENT IN A COVER OF A MOTOR VEHICLE.
DE102010041174A1 (en) 2010-09-22 2012-03-22 Robert Bosch Gmbh Method for aerodynamically supporting braking operation of motor car, involves detecting activation of brake device of motor car, and enlarging airflow through heat exchanger of cooling system for improving air resistance of motor car
FR3063686A1 (en) * 2017-03-09 2018-09-14 Gilbert Camara DEVICE FOR CHANNELING AND MANAGING THE FLOW OF COOLING AIR FLOW OF A VEHICLE AND SUPPORTING ONE OR MORE EOLIANS ELECTRIC GENERATORS.

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CN115352266A (en) * 2022-09-06 2022-11-18 南京十里文化有限公司 Wind power generation application system and application method in automobile driving process

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FR2914233B1 (en) 2009-05-08

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