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EP3765318A1 - Method and system for controlling a thermal regulation system of a motor vehicle - Google Patents

Method and system for controlling a thermal regulation system of a motor vehicle

Info

Publication number
EP3765318A1
EP3765318A1 EP19712717.8A EP19712717A EP3765318A1 EP 3765318 A1 EP3765318 A1 EP 3765318A1 EP 19712717 A EP19712717 A EP 19712717A EP 3765318 A1 EP3765318 A1 EP 3765318A1
Authority
EP
European Patent Office
Prior art keywords
temperature
evaporator
setpoint
module
vehicle
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.)
Withdrawn
Application number
EP19712717.8A
Other languages
German (de)
French (fr)
Inventor
Jean-Marie L'huillier
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 SA
Original Assignee
Renault SA
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 SA filed Critical Renault SA
Publication of EP3765318A1 publication Critical patent/EP3765318A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00735—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
    • B60H1/00764—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models the input being a vehicle driving condition, e.g. speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/0073—Control systems or circuits characterised by particular algorithms or computational models, e.g. fuzzy logic or dynamic models
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00735—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
    • B60H1/00807—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models the input being a specific way of measuring or calculating an air or coolant temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • B60H1/3204—Cooling devices using compression
    • B60H1/3205—Control means therefor
    • B60H1/3208—Vehicle drive related control of the compressor drive means, e.g. for fuel saving purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • B60H2001/3236—Cooling devices information from a variable is obtained
    • B60H2001/3255—Cooling devices information from a variable is obtained related to temperature
    • B60H2001/3261—Cooling devices information from a variable is obtained related to temperature of the air at an evaporating unit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • B60H2001/3236—Cooling devices information from a variable is obtained
    • B60H2001/3255—Cooling devices information from a variable is obtained related to temperature
    • B60H2001/3263—Cooling devices information from a variable is obtained related to temperature of the refrigerant at an evaporating unit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • B60H2001/3269—Cooling devices output of a control signal
    • B60H2001/327—Cooling devices output of a control signal related to a compressing unit

Definitions

  • the present invention relates to the field of air conditioning systems capable of regulating the temperature in a motor vehicle, in particular with thermal or hybrid propulsion.
  • the invention relates to air conditioning systems comprising an externally controlled compressor.
  • an air conditioning system or cold loop includes a compressor, a condenser, a pressure reducer and a heat exchanger or evaporator and for taking calories from the air used to cool an environment.
  • the temperature of the evaporator is generally regulated according to a thermal need, for example, according to a control command of the driver and an instantaneous value of the evaporator temperature measured by a temperature sensor.
  • Temperature control systems of the evaporator comprising a regulator valve integrated in the compressor in order to control the displacement of the compressor and thus its flow rate.
  • the control valve is controlled to respond to changes in the engine to ensure a nearly constant flow of refrigerant and therefore a constant temperature in the passenger compartment of the motor vehicle.
  • the object of the present invention is a method for controlling a thermal regulation system of a motor vehicle, said thermal regulation system comprising a set of pipes forming a so-called refrigerant loop containing a refrigerant and connecting at least one compressor , a condenser, an expansion member and an evaporator.
  • the temperature of the evaporator is regulated according to a temperature control setpoint for cooling the passenger compartment of the vehicle and an average value of the temperature of the evaporator over a determined period of time, for example equal to 30 seconds.
  • a command setpoint obtained for example from a request from the driver of the vehicle, is recovered in order to cool the passenger compartment of the vehicle, an average value of the temperature of the vehicle is calculated.
  • evaporator over a predetermined period, for example equal to 30 seconds, a difference is calculated between the temperature set point and said calculated average value of the evaporator temperature and said calculated difference is corrected by calculating a corrected temperature setpoint, for example by applying an integral proportional regulator.
  • the vehicle can be checked whether the vehicle is in a deceleration phase, obtained for example, when the vehicle speed drops or when a zero torque setpoint is requested, and when the vehicle is in the deceleration phase, it is transmitted to a control module the temperature of the evaporator a first temperature setpoint, for example equal to 2 ° C.
  • the temperature regulation module is sent the corrected temperature setpoint.
  • the temperature control module of the evaporator calculates a second difference between said temperature setpoint transmitted, and the instantaneous measured value of the evaporator temperature, by for example, by a temperature sensor and said second calculated difference is corrected to deliver to the compressor a final control flow control acting for example on the compressor capacity or more generally on the flow of refrigerant, for example by applying a proportional integral regulator .
  • the invention relates to a control system of a thermal regulation system capable of cooling the passenger compartment of a motor vehicle, said thermal regulation system comprising a set of pipes forming a so-called refrigerant loop containing a refrigerant and connecting at least one compressor, a condenser, an expansion member and an evaporator.
  • the system comprises a module for acquiring a temperature setpoint and a module for regulating the temperature of the evaporator as a function of an average value of the temperature of the evaporator established over a determined period of time.
  • the temperature control module of the evaporator comprises a module for calculating an average value of the evaporator temperature over a determined period of time, for example equal to 30 seconds, a comparator configured to calculate a first difference between the temperature set point and said calculated average value of the evaporator temperature and a correction module of said calculated difference configured to deliver a corrected temperature setpoint.
  • the correction module is, for example, an integral proportional regulator.
  • the system may include a verification module configured to check whether the vehicle is in the deceleration phase, obtained, for example, when the vehicle speed drops or when a zero torque instruction is requested.
  • the control system transmits to an evaporator temperature control module a first temperature setpoint, for example equal to 2 ° C, and when the vehicle is not in phase deceleration, the control system transmits to the temperature control module of the evaporator the corrected temperature setpoint.
  • the temperature control module of the evaporator comprises a module for calculating a control acting for example on the displacement of the compressor or more generally on the refrigerant flow rate as a function of the setpoint transmitted to this module and an instantaneous value. measured, for example, by a temperature sensor, the temperature of the evaporator.
  • the module for calculating a control acting on the displacement of the compressor comprises a second comparator configured to calculate a difference between the temperature setpoint transmitted to this module and the instantaneous value of the evaporator temperature and a second module. correction of said calculated difference configured to deliver a command acting for example on the compressor capacity or more generally on the refrigerant flow rate.
  • the second correction module is, for example an integral proportional regulator.
  • the invention relates to a motor vehicle with thermal or hybrid propulsion comprising a thermal regulation system comprising a set of pipes forming a so-called refrigerant loop containing a refrigerant and connecting at least one compressor, a condenser, an organ and an evaporator, and a control system of the thermal control system as described above.
  • FIG. 1 schematically shows a thermal control system of a motor vehicle according to the invention
  • FIG. 2 shows in detail a control system of the thermal regulation system of FIG. 1;
  • FIG. 3 illustrates a flowchart of an implementation mode of a control method of the thermal regulation system of FIG. 1.
  • FIG. 1 shows a thermal regulation system or air conditioning system 10 intended to be integrated in a motor vehicle with thermal or hybrid propulsion (not shown).
  • the air conditioning system 10 is able to cool the passenger compartment H of the motor vehicle and to be integrated in a heating and / or air conditioning system, called "HVAC" (not shown) comprising a motor fan 1 1 to blow the air to inside the cockpit H.
  • HVAC heating and / or air conditioning system
  • the air conditioning system 10 comprises a set of pipes 12 forming a so-called refrigerant loop containing a refrigerant or refrigerant (not shown) and connecting a compressor 13 which compresses said coolant, a condenser 14 located, for example, in front of the vehicle, an expansion member 15 and an evaporator 16 wherein the fluid vaporizes by absorbing calories.
  • the air conditioning system comprises a compressor and an evaporator.
  • the air conditioning system is a reversible heat pump system for cooling or heating the passenger compartment of the vehicle.
  • the temperature of the evaporator 16 is controlled by a control system 20 for regulating said temperature as a function of a control setpoint Tcons coming for example from a request from the driver of the vehicle to cool the passenger compartment H of the vehicle.
  • the control system 20 comprises a module 21 for acquiring a temperature setpoint Tcons, and a module 22 for regulating the temperature of the evaporator 16 as a function of an average value Tmoy of the temperature of the evaporator 16 established over a fixed period of time t.
  • the temperature control module 22 of the evaporator comprises a module 23 for calculating an average value Tmoy of the temperature of the evaporator 16 over a determined period of time t, for example equal to 30 seconds.
  • comparator 24 configured to calculate a difference DT 1 between the temperature setpoint Tcons and said calculated average value Tmoy of the temperature of the evaporator and a correction module 25 of said calculated difference DT 1 configured to deliver a corrected temperature setpoint Tcons corr .
  • the correction module 25 is, for example, an integral proportional regulator.
  • the control system 20 further comprises a verification module 26 for checking whether the vehicle is in the deceleration phase, obtained, for example, when the vehicle speed is falling or when a zero torque instruction is requested.
  • the control system 20 transmits to a module 27 for calculating a command T2f acting for example on the displacement of the compressor or more generally on the flow rate of the refrigerant, a first temperature set T lf for example equal to 2 ° C.
  • the module 27 for calculating the command T2f acting for example on the displacement of the compressor or more generally on the flow rate of the refrigerant comprises a second comparator 28 configured to calculate a difference DT2 between a second temperature setpoint T2 (cons_corr) transmitted to the module 27. , ie either the setpoint T lf or the setpoint Tcons corr and an instantaneous value Tmes of the temperature of the evaporator 16 and a second module 29 for the correction of said calculated difference configured to deliver to the compressor a command T2f acting for example, the displacement of the compressor or, more generally, the flow rate of the refrigerant.
  • the second correction module 29 is, for example an integral proportional regulator.
  • FIG. 3 illustrates a flowchart of an embodiment of a method of operation or control of the thermal regulation system 10 of FIG. 1.
  • a control setpoint Tcons obtained from, for example, a request from the driver of the vehicle is recovered to cool the passenger compartment H of the vehicle.
  • a second step 32 an average value Tmoy of the temperature of the evaporator 16 is calculated over a determined duration t, for example equal to 30 seconds, and then, in step 33, a difference DT 1 is calculated between the temperature setpoint Tcons and said calculated average value Tmoy of the temperature of the evaporator and said difference DT 1 calculated in step 34 is corrected by calculating a corrected temperature setpoint Tcons corr, for example by applying a proportional integral regulator .
  • the temperature of the evaporator is regulated according to a temperature control set point and an average of the measured evaporator temperature.
  • step 35 it is checked whether the vehicle is in the deceleration phase, obtained, for example, when the vehicle speed drops or when a zero torque reference is requested.
  • a first temperature reference T lf for example equal to 2 ° C, is transmitted.
  • a second difference DT2 is calculated in step 37 between the second setpoint of T2 temperature (cons_corr) transmitted to the module 27, that is to say the setpoint T lf or setpoint Tcons corr and said instantaneous value Tmes of the evaporator temperature and is corrected, in step 37 said difference calculated to deliver the compressor or the compressor control module a compressor control control acting on the refrigerant flow T2f, for example by applying a proportional integral controller.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Software Systems (AREA)
  • Theoretical Computer Science (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

Disclosed is a system (20) for controlling a thermal regulation system (10) capable of cooling the passenger compartment of a motor vehicle, said thermal regulation system (10) comprising a pipe (12) forming a refrigeration loop containing a refrigerant and connecting at least a compressor (13), a condenser (14), an expansion member (15) and an evaporator (16). The control system comprises a module for acquiring a temperature setpoint and a module for regulating the temperature of the evaporator according to an average value of the temperature of the evaporator established over a defined time period.

Description

Procédé et système de commande d'un système de régulation thermique d'un véhicule automobile  Method and system for controlling a thermal regulation system of a motor vehicle

La présente invention concerne le domaine des systèmes de climatisation capables de réguler la température dans un véhicule automobile, notamment à propulsion thermique ou hybride. The present invention relates to the field of air conditioning systems capable of regulating the temperature in a motor vehicle, in particular with thermal or hybrid propulsion.

Plus particulièrement, l’invention concerne les systèmes de climatisation comprenant un compresseur à commande externe.  More particularly, the invention relates to air conditioning systems comprising an externally controlled compressor.

De manière générale, un système de climatisation ou boucle froide comprend un compresseur, un condenseur, un détendeur et un échangeur de chaleur ou évaporateur et permettant de prélever les calories de l’air servant à climatiser un environnement. La température de l’évaporateur est généralement régulée en fonction d’un besoin thermique, par exemple, selon une consigne de commande du conducteur et d’une valeur instantanée de la température de l’évaporateur mesurée par un capteur de température.  In general, an air conditioning system or cold loop includes a compressor, a condenser, a pressure reducer and a heat exchanger or evaporator and for taking calories from the air used to cool an environment. The temperature of the evaporator is generally regulated according to a thermal need, for example, according to a control command of the driver and an instantaneous value of the evaporator temperature measured by a temperature sensor.

On connaît les systèmes de régulation de la température de l’évaporateur comprenant une vanne de régulation intégrée au compresseur afin de commander la cylindrée du compresseur et ainsi son débit.  Temperature control systems of the evaporator are known comprising a regulator valve integrated in the compressor in order to control the displacement of the compressor and thus its flow rate.

II est ainsi possible d’ajuster la puissance thermique nécessaire au confort des passagers au plus près du besoin.  It is thus possible to adjust the thermal power required to comfort passengers as close to the need.

Par ailleurs, le compresseur étant entraîné par la courroie du moteur thermique, le débit du fluide réfrigérant dépend de la vitesse de rotation du moteur. La vanne de régulation est commandée de manière à répondre aux variations du moteur thermique afin d’assurer un débit quasi constant du fluide réfrigérant et donc une température constante dans l’habitacle du véhicule automobile.  Moreover, since the compressor is driven by the belt of the heat engine, the flow rate of the coolant depends on the speed of rotation of the engine. The control valve is controlled to respond to changes in the engine to ensure a nearly constant flow of refrigerant and therefore a constant temperature in the passenger compartment of the motor vehicle.

Toutefois, lorsque le véhicule automobile roule en zone urbaine, la vitesse du véhicule n’est pas stable en raison de décélérations ou d’accélérations répétées. Le régime moteur va donc fortement fluctuer. However, when the motor vehicle is driven in urban areas, the speed of the vehicle is not stable because of repeated decelerations or accelerations. The engine speed will therefore fluctuate greatly.

Durant les phases de décélération du véhicule automobile, l’alimentation en carburant du moteur thermique est interrompue par mesure d’économies, le véhicule se déplaçant uniquement à l’aide de son énergie cinétique.  During the deceleration phases of the motor vehicle, the fuel supply of the engine is interrupted for cost savings, the vehicle moving only with its kinetic energy.

Toutefois, pendant ces phases de décélération, cette énergie est donc disponible, sans apport de carburant.  However, during these deceleration phases, this energy is available without fuel.

La présente invention a pour obj et un procédé de commande d’un système de régulation thermique d’un véhicule automobile, ledit système de régulation thermique comprenant un ensemble de tuyaux formant une boucle dite de réfrigérant contenant un fluide frigorigène et reliant au moins un compresseur, un condenseur, un organe de détente et un évaporateur.  The object of the present invention is a method for controlling a thermal regulation system of a motor vehicle, said thermal regulation system comprising a set of pipes forming a so-called refrigerant loop containing a refrigerant and connecting at least one compressor , a condenser, an expansion member and an evaporator.

On régule la température de l’évaporateur en fonction d’une consigne de commande de température pour refroidir l’habitacle du véhicule et d’une valeur moyenne de la température de l’évaporateur sur une durée déterminée, par exemple égale à 30 secondes.  The temperature of the evaporator is regulated according to a temperature control setpoint for cooling the passenger compartment of the vehicle and an average value of the temperature of the evaporator over a determined period of time, for example equal to 30 seconds.

Avantageusement, pour réguler la température de l’évaporateur, on récupère une consigne de commande, provenant par exemple d’une demande du conducteur du véhicule, afin de refroidir l’habitacle du véhicule, on calcule une valeur moyenne de la température de l’évaporateur sur une durée déterminée, par exemple égale à 30 secondes, on calcule une différence entre la consigne de température et ladite valeur moyenne calculée de la température de l’évaporateur et on corrige ladite différence calculée en calculant une consigne corrigée de température, par exemple en appliquant un régulateur proportionnel intégral.  Advantageously, in order to regulate the temperature of the evaporator, a command setpoint, obtained for example from a request from the driver of the vehicle, is recovered in order to cool the passenger compartment of the vehicle, an average value of the temperature of the vehicle is calculated. evaporator over a predetermined period, for example equal to 30 seconds, a difference is calculated between the temperature set point and said calculated average value of the evaporator temperature and said calculated difference is corrected by calculating a corrected temperature setpoint, for example by applying an integral proportional regulator.

On peut vérifier si le véhicule est en phase de décélération, obtenue par exemple, lorsque la vitesse du véhicule chute ou lorsqu’une consigne de couple nul est demandée, et lorsque le véhicule est en phase de décélération, on transmet à un module de régulation de la température de l’évaporateur une première consigne de température, par exemple égale à 2°C. Lorsque le véhicule n’est pas en phase de décélération, on transmet alors au module de régulation de température la consigne corrigée de température. It can be checked whether the vehicle is in a deceleration phase, obtained for example, when the vehicle speed drops or when a zero torque setpoint is requested, and when the vehicle is in the deceleration phase, it is transmitted to a control module the temperature of the evaporator a first temperature setpoint, for example equal to 2 ° C. When the vehicle is not in the deceleration phase, then the temperature regulation module is sent the corrected temperature setpoint.

Par exemple, pour calculer la commande finale agissant sur la cylindrée du compresseur, le module de régulation de température de l’évaporateur calcule une deuxième différence entre ladite consigne de température transmise, et la valeur instantanée mesurée de la température de l’évaporateur, par exemple, par un capteur de température et on corrige ladite deuxième différence calculée pour délivrer au compresseur une commande finale de contrôle du débit agissant par exemple sur la cylindrée du compresseur ou plus généralement sur le débit de réfrigérant, par exemple en appliquant un régulateur proportionnel intégral.  For example, to calculate the final control acting on the displacement of the compressor, the temperature control module of the evaporator calculates a second difference between said temperature setpoint transmitted, and the instantaneous measured value of the evaporator temperature, by for example, by a temperature sensor and said second calculated difference is corrected to deliver to the compressor a final control flow control acting for example on the compressor capacity or more generally on the flow of refrigerant, for example by applying a proportional integral regulator .

Selon un second aspect, l’invention concerne un système de commande d’un système de régulation thermique capable de refroidir l’habitacle d’un véhicule automobile, ledit système de régulation thermique comprenant un ensemble de tuyaux formant une boucle dite de réfrigérant contenant un fluide frigorigène et reliant au moins un compresseur, un condenseur, un organe de détente et un évaporateur.  According to a second aspect, the invention relates to a control system of a thermal regulation system capable of cooling the passenger compartment of a motor vehicle, said thermal regulation system comprising a set of pipes forming a so-called refrigerant loop containing a refrigerant and connecting at least one compressor, a condenser, an expansion member and an evaporator.

Le système comprend un module d’acquisition d’une consigne de température et un module de régulation de la température de l’évaporateur en fonction d’une valeur moyenne de la température de l’évaporateur établie sur une durée déterminée.  The system comprises a module for acquiring a temperature setpoint and a module for regulating the temperature of the evaporator as a function of an average value of the temperature of the evaporator established over a determined period of time.

Avantageusement, le module de régulation de la température de l’évaporateur comprend un module de calcul d’une valeur moyenne de la température de l’évaporateur sur une durée déterminée, par exemple égale à 30 secondes, un comparateur configuré pour calculer une première différence entre la consigne de température et ladite valeur moyenne calculée de la température de l’évaporateur et un module de correction de ladite différence calculée configuré pour délivrer une consigne corrigée de température.  Advantageously, the temperature control module of the evaporator comprises a module for calculating an average value of the evaporator temperature over a determined period of time, for example equal to 30 seconds, a comparator configured to calculate a first difference between the temperature set point and said calculated average value of the evaporator temperature and a correction module of said calculated difference configured to deliver a corrected temperature setpoint.

Le module de correction est, par exemple, un régulateur proportionnel intégral. Le système peut comprendre un module de vérification configuré pour vérifier si le véhicule est en phase de décélération, obtenue, par exemple, lorsque la vitesse du véhicule chute ou lorsqu’une consigne de couple nul est demandée. Lorsque le véhicule est en phase de décélération, le système de commande transmet à un module de régulation de la température de l’évaporateur une première consigne de température, par exemple égale à 2°C, et lorsque le véhicule n’est pas en phase de décélération, le système de commande transmet à ce module de régulation de la température de l’évaporateur la consigne corrigée de température. Le module de régulation de température de l’évaporateur comprend un module de calcul d’une commande agissant par exemple sur la cylindrée du compresseur ou plus généralement sur le débit de réfrigérant en fonction de la consigne transmise à ce module et d’une valeur instantanée mesurée, par exemple, par un capteur de température, de la température de l’évaporateur. The correction module is, for example, an integral proportional regulator. The system may include a verification module configured to check whether the vehicle is in the deceleration phase, obtained, for example, when the vehicle speed drops or when a zero torque instruction is requested. When the vehicle is in deceleration phase, the control system transmits to an evaporator temperature control module a first temperature setpoint, for example equal to 2 ° C, and when the vehicle is not in phase deceleration, the control system transmits to the temperature control module of the evaporator the corrected temperature setpoint. The temperature control module of the evaporator comprises a module for calculating a control acting for example on the displacement of the compressor or more generally on the refrigerant flow rate as a function of the setpoint transmitted to this module and an instantaneous value. measured, for example, by a temperature sensor, the temperature of the evaporator.

Par exemple, le module de calcul d’une commande agissant sur la cylindrée du compresseur comprend un deuxième comparateur configuré pour calculer une différence entre la consigne de température transmise à ce module et ladite valeur instantanée de la température de l’évaporateur et un deuxième module de correction de ladite différence calculée configuré pour délivrer une commande agissant par exemple sur la cylindrée du compresseur ou plus généralement sur le débit du réfrigérant. Le deuxième module de correction est, par exemple un régulateur proportionnel intégral.  For example, the module for calculating a control acting on the displacement of the compressor comprises a second comparator configured to calculate a difference between the temperature setpoint transmitted to this module and the instantaneous value of the evaporator temperature and a second module. correction of said calculated difference configured to deliver a command acting for example on the compressor capacity or more generally on the refrigerant flow rate. The second correction module is, for example an integral proportional regulator.

Selon un troisième aspect, l’invention concerne un véhicule automobile à propulsion thermique ou hybride comprenant un système de régulation thermique comprenant un ensemble de tuyaux formant une boucle dite de réfrigérant contenant un fluide frigorigène et reliant au moins un compresseur, un condenseur, un organe de détente et un évaporateur, et un système de commande du système de régulation thermique tel que décrit précédemment. D’autres buts, caractéristiques et avantages de l’invention apparaîtront à la lecture de la description suivante, donnée uniquement à titre d’exemple non limitatif, et faite en référence aux dessins annexés sur lesquels : According to a third aspect, the invention relates to a motor vehicle with thermal or hybrid propulsion comprising a thermal regulation system comprising a set of pipes forming a so-called refrigerant loop containing a refrigerant and connecting at least one compressor, a condenser, an organ and an evaporator, and a control system of the thermal control system as described above. Other objects, features and advantages of the invention will appear on reading the following description, given solely by way of nonlimiting example, and with reference to the appended drawings in which:

- la figure 1 représente schématiquement un système de régulation thermique d’un véhicule automobile selon l’invention;  - Figure 1 schematically shows a thermal control system of a motor vehicle according to the invention;

- la figure 2 représente en détails un système de commande du système de régulation thermique de la figure 1 ; et  FIG. 2 shows in detail a control system of the thermal regulation system of FIG. 1; and

- la figure 3 illustre un organigramme d’un mode de mise en œuvre d’un procédé de commande du système de régulation thermique de la figure 1 .  FIG. 3 illustrates a flowchart of an implementation mode of a control method of the thermal regulation system of FIG. 1.

On a représenté sur la figure 1 un système de régulation thermique ou système de climatisation 10 destiné à être intégré dans un véhicule automobile à propulsion thermique ou hybride (non représenté). Le système de climatisation 10 est capable de refroidir l’habitacle H du véhicule automobile et à être intégré dans une installation de chauffage et/ou de climatisation, dite « HVAC » (non représentée) comprenant un motoventilateur 1 1 pour souffler l’air à l’intérieur de l’habitacle H.  FIG. 1 shows a thermal regulation system or air conditioning system 10 intended to be integrated in a motor vehicle with thermal or hybrid propulsion (not shown). The air conditioning system 10 is able to cool the passenger compartment H of the motor vehicle and to be integrated in a heating and / or air conditioning system, called "HVAC" (not shown) comprising a motor fan 1 1 to blow the air to inside the cockpit H.

Le système de climatisation 10 comprend un ensemble de tuyaux 12 formant une boucle dite de réfrigérant contenant un fluide frigorigène ou réfrigérant (non représenté) et reliant un compresseur 13 qui comprime ledit fluide réfrigérant, un condenseur 14 situé, par exemple, en face avant du véhicule, un organe de détente 15 et un évaporateur 16 dans lequel le fluide se vaporise en absorbant des calories.  The air conditioning system 10 comprises a set of pipes 12 forming a so-called refrigerant loop containing a refrigerant or refrigerant (not shown) and connecting a compressor 13 which compresses said coolant, a condenser 14 located, for example, in front of the vehicle, an expansion member 15 and an evaporator 16 wherein the fluid vaporizes by absorbing calories.

On notera que l’invention n’est pas limitée à un tel système de climatisation. De manière générale, le système de climatisation comprend un compresseur et un évaporateur.  Note that the invention is not limited to such an air conditioning system. In general, the air conditioning system comprises a compressor and an evaporator.

On pourrait également prévoir que le système de climatisation soit un système de pompe à chaleur réversible afin de refroidir ou de réchauffer l’habitacle du véhicule. La température de l’évaporateur 16 est commandée par un système de commande 20 permettant de réguler ladite température en fonction d’une consigne de commande Tcons provenant par exemple d’une demande du conducteur du véhicule afin de refroidir l’habitacle H du véhicule. It could also be provided that the air conditioning system is a reversible heat pump system for cooling or heating the passenger compartment of the vehicle. The temperature of the evaporator 16 is controlled by a control system 20 for regulating said temperature as a function of a control setpoint Tcons coming for example from a request from the driver of the vehicle to cool the passenger compartment H of the vehicle.

Le système de commande 20 comprend un module 21 d’acquisition d’une consigne de température Tcons, et un module 22 de régulation de la température de l’évaporateur 16 en fonction d’une valeur moyenne Tmoy de la température de l’évaporateur 16 établie sur une durée déterminée t.  The control system 20 comprises a module 21 for acquiring a temperature setpoint Tcons, and a module 22 for regulating the temperature of the evaporator 16 as a function of an average value Tmoy of the temperature of the evaporator 16 established over a fixed period of time t.

A cet effet, le module 22 de régulation de la température de l’évaporateur comprend un module 23 de calcul d’une valeur moyenne Tmoy de la température de l’évaporateur 16 sur une durée déterminée t, par exemple égale à 30 secondes, un comparateur 24 configuré pour calculer une différence DT 1 entre la consigne de température Tcons et ladite valeur moyenne Tmoy calculée de la température de l’évaporateur et un module 25 de correction de ladite différence DT 1 calculée configuré pour délivrer une consigne corrigée de température Tcons corr. Le module 25 de correction est, par exemple un régulateur proportionnel intégral.  For this purpose, the temperature control module 22 of the evaporator comprises a module 23 for calculating an average value Tmoy of the temperature of the evaporator 16 over a determined period of time t, for example equal to 30 seconds. comparator 24 configured to calculate a difference DT 1 between the temperature setpoint Tcons and said calculated average value Tmoy of the temperature of the evaporator and a correction module 25 of said calculated difference DT 1 configured to deliver a corrected temperature setpoint Tcons corr . The correction module 25 is, for example, an integral proportional regulator.

Le système de commande 20 comprend en outre un module 26 de vérification pour vérifier si le véhicule est en phase de décélération, obtenue, par exemple, lorsque la vitesse du véhicule chute ou lorsqu’une consigne de couple nul est demandée.  The control system 20 further comprises a verification module 26 for checking whether the vehicle is in the deceleration phase, obtained, for example, when the vehicle speed is falling or when a zero torque instruction is requested.

Lorsque le véhicule est en phase de décélération, le système de commande 20 transmet à un module 27 de calcul d’une commande T2f agissant par exemple sur la cylindrée du compresseur ou plus généralement sur le débit du réfrigérant, une première consigne de température T l f, par exemple égale à 2°C.  When the vehicle is in the deceleration phase, the control system 20 transmits to a module 27 for calculating a command T2f acting for example on the displacement of the compressor or more generally on the flow rate of the refrigerant, a first temperature set T lf for example equal to 2 ° C.

Lorsque le véhicule n’est pas en phase de décélération, le système de commande 20 transmet au module 27 la consigne corrigée de température Tcons corr. Le module 27 de calcul de la commande T2f agissant par exemple sur la cylindrée du compresseur ou plus généralement sur le débit du réfrigérant comprend un deuxième comparateur 28 configuré pour calculer une différence DT2 entre une deuxième consigne de température T2(cons_corr) transmise au module 27, c’est à dire soit la consigne T l f, soit la consigne Tcons corr et une valeur instantanée Tmes de la température de l’évaporateur 16 et un deuxième module 29 de correction de ladite différence calculée configuré pour délivrer au compresseur une commande T2f agissant par exemple sur la cylindrée du compresseur ou plus généralement sur le débit du réfrigérant. Le deuxième module 29 de correction est, par exemple un régulateur proportionnel intégral. When the vehicle is not in the deceleration phase, the control system 20 transmits to the module 27 the corrected temperature setpoint Tcons corr. The module 27 for calculating the command T2f acting for example on the displacement of the compressor or more generally on the flow rate of the refrigerant comprises a second comparator 28 configured to calculate a difference DT2 between a second temperature setpoint T2 (cons_corr) transmitted to the module 27. , ie either the setpoint T lf or the setpoint Tcons corr and an instantaneous value Tmes of the temperature of the evaporator 16 and a second module 29 for the correction of said calculated difference configured to deliver to the compressor a command T2f acting for example, the displacement of the compressor or, more generally, the flow rate of the refrigerant. The second correction module 29 is, for example an integral proportional regulator.

La figure 3 illustre un organigramme d’un mode de mise en œuvre d’un procédé de fonctionnement ou commande 30 du système de régulation thermique 10 de la figure 1 .  FIG. 3 illustrates a flowchart of an embodiment of a method of operation or control of the thermal regulation system 10 of FIG. 1.

Lors d’une première étape 3 1 , on récupère une consigne de commande Tcons provenant par exemple d’une demande du conducteur du véhicule afin de refroidir l’habitacle H du véhicule.  During a first step 31, a control setpoint Tcons obtained from, for example, a request from the driver of the vehicle is recovered to cool the passenger compartment H of the vehicle.

Lors d’une deuxième étape 32, on calcule une valeur moyenne Tmoy de la température de l’évaporateur 16 sur une durée déterminée t, par exemple égale à 30 secondes, puis on calcule, à l’étape 33 , une différence DT 1 entre la consigne de température Tcons et ladite valeur moyenne Tmoy calculée de la température de l’évaporateur et on corrige, à l’étape 34 ladite différence DT 1 calculée en calculant une consigne corrigée de température Tcons corr, par exemple en appliquant un régulateur proportionnel intégral.  In a second step 32, an average value Tmoy of the temperature of the evaporator 16 is calculated over a determined duration t, for example equal to 30 seconds, and then, in step 33, a difference DT 1 is calculated between the temperature setpoint Tcons and said calculated average value Tmoy of the temperature of the evaporator and said difference DT 1 calculated in step 34 is corrected by calculating a corrected temperature setpoint Tcons corr, for example by applying a proportional integral regulator .

Grâce aux étapes 32 à 34, on régule la température de l’évaporateur en fonction d’une consigne de commande de la température et d’une moyenne de la température mesurée de l’évaporateur.  By means of steps 32 to 34, the temperature of the evaporator is regulated according to a temperature control set point and an average of the measured evaporator temperature.

A l’étape 35 , on vérifie si le véhicule est en phase de décélération, obtenue, par exemple, lorsque la vitesse du véhicule chute ou lorsqu’une consigne de couple nul est demandée. Lorsque le véhicule est en phase de décélération, on transmet une première consigne de température T l f, par exemple égale à 2°C . In step 35, it is checked whether the vehicle is in the deceleration phase, obtained, for example, when the vehicle speed drops or when a zero torque reference is requested. When the vehicle is in the deceleration phase, a first temperature reference T lf, for example equal to 2 ° C, is transmitted.

Lorsque le véhicule n’est pas en phase de décélération, on transmet la consigne de température Tcons corr.  When the vehicle is not in the deceleration phase, the temperature setpoint Tcons corr.

Pour calculer la commande T2f de contrôle du compresseur agissant sur le débit de réfrigérant et permettant la régulation de température de l’air en sortie de l’évaporateur, on calcule, à l’étape 37, une deuxième différence DT2 entre la deuxième consigne de température T2(cons_corr) transmise au module 27, c’est à dire la consigne T l f ou la consigne Tcons corr et ladite valeur instantanée Tmes de la température de l’évaporateur et on corrige, à l’étape 37 ladite différence calculée pour délivrer au compresseur ou bien au module de pilotage du compresseur une commande de contrôle du compresseur agissant sur le débit de réfrigérant T2f, par exemple en appliquant un régulateur proportionnel intégral.  To calculate the control command T2f controlling the compressor acting on the refrigerant flow and allowing the temperature regulation of the air at the outlet of the evaporator, a second difference DT2 is calculated in step 37 between the second setpoint of T2 temperature (cons_corr) transmitted to the module 27, that is to say the setpoint T lf or setpoint Tcons corr and said instantaneous value Tmes of the evaporator temperature and is corrected, in step 37 said difference calculated to deliver the compressor or the compressor control module a compressor control control acting on the refrigerant flow T2f, for example by applying a proportional integral controller.

Grâce au calcul d’une moyenne des valeurs de températures de l’évaporateur sur une durée déterminée, et donc à la régulation de la température de l’évaporateur moyennée dans le temps, on peut compenser le surplus de froid obtenu grâce à l’énergie cinétique du véhicule en appliquant à l’évaporateur une consigne de température plus importante que le besoin instantané, ce qui permet d’obtenir un gain sur la consommation de carburant d’environ 25% en zone urbaine.  By calculating an average of the evaporator temperature values over a determined period of time, and therefore the regulation of the evaporator temperature averaged over time, it is possible to compensate for the surplus of cold obtained by means of the energy kinetic of the vehicle by applying to the evaporator a higher temperature setpoint than the instantaneous need, which makes it possible to obtain a gain on the fuel consumption of approximately 25% in urban area.

Claims

REVENDICATIONS 1 . Procédé de commande d’un système de régulation thermique ( 10) d’un véhicule automobile, ledit système de régulation thermique comprenant un ensemble de tuyaux ( 12) formant une boucle de réfrigérant contenant un fluide frigorigène et reliant au moins un compresseur ( 13), un condenseur ( 14), un organe de détente ( 15) et un évaporateur ( 16), caractérisé en ce qu’on régule la température de l’évaporateur ( 16) en fonction d’une consigne de commande de température (Tcons) pour refroidir l’habitacle (H) du véhicule et d’une valeur moyenne (Tmoy) de la température de l’évaporateur ( 16) sur une durée déterminée (t). 1. A method of controlling a thermal control system (10) of a motor vehicle, said thermal regulation system comprising a set of pipes (12) forming a refrigerant loop containing a refrigerant and connecting at least one compressor (13) , a condenser (14), an expansion member (15) and an evaporator (16), characterized in that the temperature of the evaporator (16) is regulated as a function of a temperature control setpoint (Tcons) for cooling the passenger compartment (H) of the vehicle and an average value (Tmoy) of the temperature of the evaporator (16) over a determined period (t). 2. Procédé selon la revendication 1 , dans lequel, pour réguler la température de l’évaporateur ( 16), on récupère une consigne de commande (Tcons) afin de refroidir l’habitacle (H) du véhicule, on calcule une valeur moyenne (Tmoy) de la température de l’évaporateur ( 16) sur une durée déterminée (t), on calcule une différence (DT 1 ) entre la consigne de température (Tcons) et ladite valeur moyenne (Tmoy) calculée de la température de l’évaporateur et on corrige ladite différence (DT 1 ) calculée en calculant une consigne corrigée de température (Tcons corr).  2. Method according to claim 1, wherein, to regulate the temperature of the evaporator (16), a control setpoint (Tcons) is recovered in order to cool the passenger compartment (H) of the vehicle, an average value is calculated ( Tmoy) of the temperature of the evaporator (16) over a determined period of time (t), a difference (DT 1) is calculated between the temperature set point (Tons) and said calculated average value (Tmoy) of the temperature of the evaporator and corrects said difference (DT 1) calculated by calculating a corrected temperature setpoint (Tons corr). 3. Procédé selon la revendication 1 ou 2, dans lequel on vérifie si le véhicule est en phase de décélération, et lorsque le véhicule est en phase de décélération, on utilise pour le contrôle de l’évaporateur une première consigne de température (T l f), et lorsque le véhicule n’est pas en phase de décélération on utilise la consigne de température (Tcons corr).  3. Method according to claim 1 or 2, wherein it is checked whether the vehicle is in the deceleration phase, and when the vehicle is in the deceleration phase, is used for the control of the evaporator a first temperature setpoint (T lf ), and when the vehicle is not in the deceleration phase, the temperature setpoint (Tcons corr) is used. 4. Procédé selon la revendication 3 , dans lequel, pour calculer la commande finale (T2f) de contrôle du débit de réfrigérant du compresseur, on calcule une deuxième différence (DT2) entre ladite valeur instantanée (Tmes) de la température de l’évaporateur et, lorsque le véhicule n’est pas en phase de décélération, la consigne corrigée de température (Tcons corr) et lorsque le véhicule est en phase de décélération, la consigne (T l f), et on corrige ladite différence calculée pour délivrer la commande finale (T2f) de contrôle du débit de réfrigérant du compresseur. 4. The method of claim 3, wherein, for calculating the final control (T2f) refrigerant flow control of the compressor, calculates a second difference (DT2) between said instantaneous value (Tmes) of the evaporator temperature. and, when the vehicle is not in the deceleration phase, the temperature corrected setpoint (Tons corr) and when the vehicle is in the deceleration phase, the setpoint (T lf), and the said difference is corrected calculated to deliver the final refrigerant flow control command (T2f) of the compressor. 5. Système de commande (20) d’un système de régulation thermique ( 10) capable de refroidir l’habitacle d’un véhicule automobile, ledit système de régulation thermique ( 10) comprenant un ensemble de tuyaux ( 12) formant une boucle de réfrigérant contenant un fluide frigorigène et reliant au moins un compresseur ( 13), un condenseur ( 14), un organe de détente ( 15) et un évaporateur ( 16), caractérisé en ce qu’il comprend un module (21 ) d’acquisition d’une consigne de température (Tcons) et un module (22) de régulation de la température de l’évaporateur ( 16) en fonction d’une valeur moyenne (Tmoy) de la température de l’évaporateur ( 16) établie sur une durée déterminée (t).  A control system (20) for a temperature control system (10) capable of cooling the passenger compartment of a motor vehicle, said thermal control system (10) comprising a plurality of hoses (12) forming a control loop. refrigerant containing a refrigerant and connecting at least one compressor (13), a condenser (14), an expansion member (15) and an evaporator (16), characterized in that it comprises a module (21) for acquisition a temperature setpoint (Tons) and a module (22) for regulating the temperature of the evaporator (16) as a function of an average value (Tmoy) of the temperature of the evaporator (16) established on a fixed term (t). 6. Système selon la revendication 5 , dans lequel le module (22) de régulation de la température de l’évaporateur comprend un module The system of claim 5, wherein the evaporator temperature control module (22) comprises a module (23) de calcul d’une valeur moyenne (Tmoy) de la température de l’évaporateur ( 16) sur une durée déterminée (t), un comparateur (24) configuré pour calculer une première différence (DT 1 ) entre la consigne de température (Tcons) et ladite valeur moyenne (Tmoy) calculée de la température de l’évaporateur et un module (25) de correction de ladite différence (DT 1 ) calculée configuré pour délivrer une consigne corrigée de température (Tcons corr). (23) for calculating an average value (Tmoy) of the temperature of the evaporator (16) over a determined duration (t), a comparator (24) configured to calculate a first difference (DT 1) between the setpoint of temperature (Tons) and said calculated average value (Tmoy) of the temperature of the evaporator and a module (25) for correcting said difference (DT 1) calculated calculated to deliver a corrected temperature setpoint (Tons corr). 7. Système selon la revendication 6, dans lequel le module (25) de correction est un régulateur proportionnel intégral.  The system of claim 6, wherein the correction module (25) is an integral proportional regulator. 8. Système selon l’une quelconque des revendications 5 à 7, comprenant un module (26) de vérification pour vérifier si le véhicule est en phase de décélération, et dans lequel le système de commande (20) transmet à un module de régulation (22) de la température de l’évaporateur une consigne de température (T2cons_corr) qui est égale à une consigne de température (T l f) lorsque le véhicule est en phase de décélération, ou est égale à la consigne corrigée de température (Tcons corr) lorsque le véhicule n’est pas en phase de décélération, et dans lequel le module de régulation de température de l’évaporateur comprend un module de calcul (27) d’une commande (T2f) de débit de réfrigérant du compresseur en fonction de la valeur instantanée mesurée (Tmes) de la température de l’évaporateur ( 16) et de la consigne de température (T2(cons_corr)). 8. System according to any one of claims 5 to 7, comprising a verification module (26) for checking whether the vehicle is in a deceleration phase, and in which the control system (20) transmits to a regulation module ( 22) of the evaporator temperature a temperature setpoint (T2cons_corr) which is equal to a temperature setpoint (T lf) when the vehicle is in the deceleration phase, or is equal to the corrected temperature setpoint (Tons corr) when the vehicle is not in the deceleration phase, and wherein the evaporator temperature control module comprises a calculation module (27) of a control flow control (T2f) compressor refrigerant according to the measured instantaneous value (Tmes) of the evaporator temperature (16) and the temperature reference (T2 (cons_corr)). 9. Système selon la revendication 8, dans lequel le module (27) de calcul de la commande (T2f) comprend un deuxième comparateur 9. System according to claim 8, wherein the module (27) for calculating the control (T2f) comprises a second comparator. (28) configuré pour calculer une différence (DT2) entre la consigne corrigée de température (T2cons_corr) et ladite valeur instantanée (Tmes) de la température de l’évaporateur et un deuxième module (29) de correction de ladite différence calculée configuré pour délivrer au compresseur une commande de débit de réfrigérant (T2f). (28) configured to calculate a difference (DT2) between the corrected temperature setpoint (T2cons_corr) and said instantaneous value (Tmes) of the evaporator temperature and a second correction module (29) of said calculated difference configured to output to the compressor a refrigerant flow control (T2f). 10. Véhicule automobile à propulsion thermique ou hybride comprenant un système de régulation thermique ( 10) comprenant un ensemble de tuyaux ( 12) formant une boucle dite de réfrigérant contenant un fluide frigorigène et reliant au moins un compresseur ( 13), un condenseur ( 14), un organe de détente ( 15) et un évaporateur A motor vehicle with thermal or hybrid propulsion comprising a thermal regulation system (10) comprising a set of pipes (12) forming a so-called refrigerant loop containing a refrigerant and connecting at least one compressor (13), a condenser (14). ), an expansion member (15) and an evaporator ( 16), et un système de commande (20) du système de régulation thermique selon l’une des revendications 5 à 9. (16), and a control system (20) of the thermal control system according to one of claims 5 to 9.
EP19712717.8A 2018-03-16 2019-03-14 Method and system for controlling a thermal regulation system of a motor vehicle Withdrawn EP3765318A1 (en)

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FR1852271A FR3078923B1 (en) 2018-03-16 2018-03-16 METHOD AND SYSTEM FOR CONTROLLING A THERMAL REGULATION SYSTEM OF A MOTOR VEHICLE
PCT/EP2019/056505 WO2019175358A1 (en) 2018-03-16 2019-03-14 Method and system for controlling a thermal regulation system of a motor vehicle

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JP4284785B2 (en) * 1999-10-13 2009-06-24 株式会社デンソー Air conditioner for vehicles
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JP4417064B2 (en) * 2003-09-30 2010-02-17 株式会社デンソー Air conditioner for vehicles
JP2006044408A (en) * 2004-08-03 2006-02-16 Sanden Corp Air conditioner for vehicle
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JP2007106260A (en) * 2005-10-13 2007-04-26 Denso Corp Air conditioner for vehicle
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CN111902301A (en) 2020-11-06
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