WO2001071305A1 - Method for accelerated degradation of an element designed to be run through by a cooling liquid in a vehicle, and installation therefor - Google Patents

Method for accelerated degradation of an element designed to be run through by a cooling liquid in a vehicle, and installation therefor Download PDF

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Publication number
WO2001071305A1
WO2001071305A1 PCT/FR2001/000793 FR0100793W WO0171305A1 WO 2001071305 A1 WO2001071305 A1 WO 2001071305A1 FR 0100793 W FR0100793 W FR 0100793W WO 0171305 A1 WO0171305 A1 WO 0171305A1
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WO
WIPO (PCT)
Prior art keywords
coolant
installation according
flow
installation
circuit
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Application number
PCT/FR2001/000793
Other languages
French (fr)
Inventor
Olivier Marchais
Original Assignee
Renault
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 filed Critical Renault
Priority to EP01917163A priority Critical patent/EP1266201A1/en
Publication of WO2001071305A1 publication Critical patent/WO2001071305A1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00—Testing of machine parts

Definitions

  • the present invention relates to a process for accelerated degradation of an organ intended to be traversed by coolant in a motor vehicle with thermal propulsion, and to an installation for implementing this process.
  • Certain components of the cooling circuit of a motor vehicle powered by a heat engine are made of materials obtained from metal alloys which, by dint of being traversed by the coolant, can pierce and give rise to leakage of this liquid. This is the case in particular of the air heater, intended to heat the passenger compartment of the motor vehicle, and of the radiator, intended to cool the heat engine.
  • the object of the present invention is to provide shorter tests which are more faithful to the modes of degradation observed in practice.
  • the object of the invention is achieved with a method of accelerated degradation of an organ intended to be traversed by coolant in a thermally propelled motor vehicle, in which said liquid is circulated in said organ, characterized in that 'The flow rate of said liquid is varied over time.
  • said flow is passed from said zero value to said maximum value in a period of between 30 and 60 seconds
  • said maximum value is between 2000 and 2500 1 / h
  • said coolant is kept at a substantially constant temperature, said temperature is around 95 ° C., said cooling liquid is heated slowly before any manipulation,
  • said parameters include the flow rate of said coolant, its temperature and pressure, said method is implemented automatically by computer means.
  • the present invention also aims to provide an installation for implementing the aforementioned method.
  • This object of the invention is achieved with an installation for implementing a method in accordance with the above for testing a member intended to be traversed by coolant in a motor vehicle with an internal combustion engine, comprising means for making circulating said coolant in said member, characterized in that said means are adapted to vary over time the flow rate of said liquid in said member.
  • the said means comprise a supply circuit comprising a pump whose speed can be modulated over time
  • said supply circuit comprises a heating tank intended to be connected to said member by an arrival circuit and by a return circuit, said pump is placed on said arrival circuit,
  • said installation comprises a flow meter placed on said inlet circuit, a first temperature probe placed on said inlet circuit, a second temperature probe placed on said heating tank, a first pressure probe placed downstream of said flow meter, and a second pressure probe placed on said return circuit,
  • the member to be tested 1 may for example be an air heater or a cooling circuit radiator of a vehicle with thermal propulsion, without this being limiting.
  • the installation according to the invention proper comprises a cooling liquid supply circuit 3 to which the member 1 is coupled.
  • This supply circuit 3 preferably comprises a heating tank 5 intended to be connected to the member 1 by an inlet circuit 7 and by a return circuit 9, these circuits being formed for example by rubber hoses vulcanized with peroxides.
  • a second pressure probe 21 and an expansion vessel 23 are placed in this order upstream of the heating tank 5 on the return circuit 9.
  • a second temperature probe 25 is placed on the heating tank 5.
  • the accuracy of the flow meter 15 is preferably of the order of 3%, and that of the temperature probes 17, 25 and the pressure probes 19, 21 is preferably of the order of 1%.
  • the electric motor 13, the flow meter 15, the temperature probes 17, 25 and the pressure probes 19, 21 are interfaced with a control computer 27 by means of electrical connections 29.
  • the circuit 3 When it is connected to the member to be tested 1, the circuit 3 is filled with a coolant preferably comprising approximately 40% deionized water and preferably having an electrical resistance of approximately 750 KOhm.
  • this coolant can be polluted by certain chemical compounds such as sodium chloride and / or by solid particles such as iron filings.
  • the volume of this liquid is in a range from 7 to 20 liters.
  • the control computer 27 varies the speed of the electric motor 13 over time, so that the flow of coolant circulating in the circuit 3 and in the member to be tested 1 (in the direction of the arrow F) also varies over time.
  • the speed of the electric motor 13 varies periodically and, even more preferably, this speed changes periodically from a zero value to a maximum value. Even more preferably, in each period, the speed of the motor 13 is zero for approximately 2 minutes, then maximum for approximately 3 minutes.
  • the speed of this motor is changed from zero to the maximum value in a period of between 30 and 60 seconds.
  • this maximum value is adapted to generate a flow of coolant in the circuit 3 and in the member 1 which is between 2000 and 2500 l / h.
  • the heating tank 5 is operated so that the coolant which reaches the member 1 is brought to a substantially constant temperature preferably around 95 ° C.
  • the tank 5 is operated at low power to avoid damaging the coolant.
  • the flow meter 15, the temperature probes 17, 25 and the pressure probes 19, 21 carry out measurements which are processed by the computer 27.
  • the method according to the invention reproduces relatively faithful to the conditions to which the tested body 1 will be subjected in practice when it is installed in a motor vehicle.
  • the variations in coolant flow induced by the variations in speed of the electric motor 13 satisfactorily reproduce the variations in coolant flow in a vehicle linked to variations in engine speed of this vehicle.
  • the heating of the coolant by the tank 5 satisfactorily reproduces the heating of the coolant by the heat engine of a vehicle.
  • the installation and the method according to the invention make it possible to degrade the organ to be tested according to a mode substantially in accordance with that actually observed in reality.
  • the tests could be carried out without heating the coolant. In this case, however, results would be less faithful to reality.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)

Abstract

. The invention concerns a method for accelerated degradation of an element (1) designed to be run through by a cooling liquid in a motor vehicle powered by a heat engine, which consists in causing said liquid to flow into said element (1). The invention is characterised in that it consists in varying the liquid flow rate in time. The invention is applicable to tests in test stands on unit heaters and radiators of motor vehicle powered by a heat engine.

Description

Procédé de; dégr•adation accéltérée d ' unι organe d<sstme a etre traversé par du luguide de ref:roidisse'ment dans un véhicule, et m .stallation de mise : en oeuvre αe ce procédéMethod of; DEGR • adation accéltérée of unι organ <sstme to be traversed by the ref luguide: roidisse 'lies in a vehicle, and m .stallation formatting: ae out this method
La présente invention se rapporte a un procédé de dégradation accélérée d'un organe destiné à être traverse par du liquide de refroidissement dans un véhicule automobile à propulsion thermique, et a une installation de mise en œuvre de ce procédé.The present invention relates to a process for accelerated degradation of an organ intended to be traversed by coolant in a motor vehicle with thermal propulsion, and to an installation for implementing this process.
Certains organes du circuit de refroidissement d'un véhicule automobile propulsé par un moteur thermique sont fabriqués dans des matériaux obtenus a partir d'alliages métalliques qui, a force d'être parcourus par le liquide de refroidissement, peuvent se percer et donner lieu a des fuites de ce liquide. C'est le cas notamment de l' aerotherme, destine a chauffer l'habitacle du véhicule automobile, et du radiateur, destiné a refroidir le moteur thermique.Certain components of the cooling circuit of a motor vehicle powered by a heat engine are made of materials obtained from metal alloys which, by dint of being traversed by the coolant, can pierce and give rise to leakage of this liquid. This is the case in particular of the air heater, intended to heat the passenger compartment of the motor vehicle, and of the radiator, intended to cool the heat engine.
Pour définir correctement les cahiers des charges de fabrication de ces organes, il est indispensable d'effectuer des essais permettant de connaître leur mode de dégradation .To correctly define the specifications for the manufacture of these organs, it is essential to carry out tests to determine their mode of degradation.
Traditionnellement, de tels essais consistent a faire circuler dans les organes à tester un fluide de refroidissement fortement pollué à flux continu jusqu'au percement de ces organes.Traditionally, such tests consist in circulating in the organs to be tested a highly polluted cooling fluid in continuous flow until the piercing of these organs.
Or, il s'avère que de tels essais nécessitent beaucoup de temps pour être menés à terme (de l'ordre de plusieurs milliers d'heures, typiquement).However, it turns out that such tests require a long time to be completed (typically of the order of several thousand hours).
En outre, on a pu constater que de tels essais ne reproduisaient pas les modes de dégradation constates dans la réalité.Furthermore, it has been observed that such tests do not reproduce the modes of degradation observed in reality.
En effet, lors de ces essais, le percement des organes testes est en général dû a la corrosion provoquée par le liquide de refroidissement fortement pollue, alors qu'un tel phénomène de corrosion n'est en pratique jamais observe dans les véhicules automobiles : les liquides de refroidissement employés permettent en effet une bonne protection des surfaces des organes de refroidissement. La présente invention a pour but de fournir des essais moins longs et plus fidèles aux modes de dégradation constatés en pratique.Indeed, in these tests, drilling the tested organs is usually due to corrosion caused by the liquid cooling heavily polluted, while such e ph corrosion enon is never practice observed in motor vehicles : the coolants used allow good protection of the surfaces of the cooling elements. The object of the present invention is to provide shorter tests which are more faithful to the modes of degradation observed in practice.
On atteint le but de 1- invention avec un procédé de dégradation accélérée d'un organe destiné à être traversé par du liquide de refroidissement dans un véhicule automobile à propulsion thermique, dans lequel on fait circuler ledit liquide dans ledit organe, caractérisé en ce qu'on fait varier le débit dudit liquide dans le temps .The object of the invention is achieved with a method of accelerated degradation of an organ intended to be traversed by coolant in a thermally propelled motor vehicle, in which said liquid is circulated in said organ, characterized in that 'The flow rate of said liquid is varied over time.
Grâce à ces caractéristiques, on reproduit de manière plus fidèle les variations de débit de liquide de refroidissement qui, en pratique, sont liées aux variations de régime du moteur thermique du véhicule. La demanderesse s'est rendue compte qu'avec de telles variations de débit, on pouvait réduire significativement la durée des essais, et qu'en plus on obtenait un mode de dégradation des organes testés sensiblement conforme à celui effectivement constaté dans la réalité.Thanks to these characteristics, the variations in the coolant flow rate are reproduced more faithfully which, in practice, are linked to variations in the engine speed of the engine. The Applicant has realized that with such variations in flow rate, the duration of the tests could be significantly reduced, and that, in addition, a mode of degradation of the organs tested was obtained which was substantially consistent with that actually observed in reality.
Suivant d'autres caractéristiques de ce procédé :According to other characteristics of this process:
- on fait varier ledit débit de manière périodique,- said flow rate is varied periodically,
- on fait varier ledit débit alternativement entre une valeur nulle et une valeur maximale, - on maintient ledit débit à ladite valeur nulle pendant environ 2 minutes, et on maintient ledit débit à ladite valeur maximale pendant environ 3 minutes,- said flow rate is varied alternately between a zero value and a maximum value, - said flow rate is maintained at said zero value for approximately 2 minutes, and said flow rate is maintained at said maximum value for approximately 3 minutes,
- on fait passer ledit débit de ladite valeur nulle à ladite valeur maximale en une durée comprise entre 30 et 60 secondes,said flow is passed from said zero value to said maximum value in a period of between 30 and 60 seconds,
- ladite valeur maximale est comprise entre 2000 et 2500 1/h,- said maximum value is between 2000 and 2500 1 / h,
- on chauffe ledit liquide de refroidissement,- said coolant is heated,
- on maintient ledit liquide de refroidissement à une température sensiblement constante, - ladite température est d'environ 95°C, on chauffe lentement ledit liquide de refroidissement préalablement à toute manipulation,said coolant is kept at a substantially constant temperature, said temperature is around 95 ° C., said cooling liquid is heated slowly before any manipulation,
- on, mesure certains -paramètres dudit liquide de refroidissement, lesdits paramètres comprennent le débit dudit liquide de refroidissement, sa température et sa pression, ledit procédé est mis en œuvre de manière automatique par des moyens informatiques.- We measure certain -parameters of said coolant, said parameters include the flow rate of said coolant, its temperature and pressure, said method is implemented automatically by computer means.
La présente invention a également pour but de fournir une installation permettant de mettre en œuvre le procédé susmentionné.The present invention also aims to provide an installation for implementing the aforementioned method.
On atteint ce but de l'invention avec une installation de mise en œuvre d'un procédé conforme à ce qui précède pour tester un organe destiné à être traversé par du liquide de refroidissement dans un véhicule automobile à moteur thermique, comprenant des moyens pour faire circuler ledit liquide de refroidissement dans ledit organe, caractérisée en ce que lesdits moyens sont adaptés pour faire varier dans le temps le débit dudit liquide dans ledit organe.This object of the invention is achieved with an installation for implementing a method in accordance with the above for testing a member intended to be traversed by coolant in a motor vehicle with an internal combustion engine, comprising means for making circulating said coolant in said member, characterized in that said means are adapted to vary over time the flow rate of said liquid in said member.
Suivant d'autres caractéristiques de cette installation : - lesdits moyens comprennent un circuit d' alimentation comportant une pompe dont la vitesse peut être modulée au cours du temps,According to other characteristics of this installation: the said means comprise a supply circuit comprising a pump whose speed can be modulated over time,
- ledit circuit d' alimentation comprend une cuve de chauffage destinée à être reliée audit organe par un circuit d'arrivée et par un circuit de retour, ladite pompe est placée sur ledit circuit d' arrivée,said supply circuit comprises a heating tank intended to be connected to said member by an arrival circuit and by a return circuit, said pump is placed on said arrival circuit,
- un vase d'expansion est placé sur ledit circuit de retour, - ladite installation comprend un débimètre placé sur ledit circuit d'arrivée, une première sonde de température placée sur ledit circuit d'arrivée, une deuxième sonde de température placée sur ladite cuve de chauffage, une première sonde de pression placée en aval dudit débimètre, et une deuxième sonde de pression placée sur ledit circuit de retour,- an expansion vessel is placed on said return circuit, said installation comprises a flow meter placed on said inlet circuit, a first temperature probe placed on said inlet circuit, a second temperature probe placed on said heating tank, a first pressure probe placed downstream of said flow meter, and a second pressure probe placed on said return circuit,
- ladite pompe est interfacée avec un ordinateur de commande, - ledit débimètre, lesdites sondes de température et lesdites sondes de pression sont interfaces avec ledit ordinateur de commande,- said pump is interfaced with a control computer, - said flow meter, said temperature probes and said pressure probes are interfaces with said control computer,
- ledit liquide de refroidissement est pollué par certains composés chimiques tels que du chlorure de sodium,- said coolant is polluted by certain chemical compounds such as sodium chloride,
- ledit liquide de refroidissement est pollué par des particules solides telles que de la limaille de fer.- Said coolant is polluted by solid particles such as iron filings.
D'autres caractéristiques et avantages de la présente invention apparaîtront à la lecture de la description qui va suivre et à l'examen du dessin annexé, dans lequel l'unique figure représente de manière schématique une installation de mise en œuvre du procédé selon l'invention lorsqu'elle est couplée à un organe à tester. L'organe à tester 1 peut être par exemple un aérotherme ou un radiateur de circuit de refroidissement d'un véhicule à propulsion thermique, sans que cela soit limitatif.Other characteristics and advantages of the present invention will become apparent on reading the description which will follow and on examining the appended drawing, in which the single figure schematically represents an installation for implementing the method according to invention when coupled to an organ to be tested. The member to be tested 1 may for example be an air heater or a cooling circuit radiator of a vehicle with thermal propulsion, without this being limiting.
L'installation selon l'invention à proprement parler comprend un circuit d'alimentation en liquide de refroidissement 3 auquel est couplé l'organe 1.The installation according to the invention proper comprises a cooling liquid supply circuit 3 to which the member 1 is coupled.
Ce circuit d'alimentation 3 comprend de préférence une cuve de chauffage 5 destinée à être reliée à l'organe 1 par un circuit d'arrivée 7 et par un circuit de retour 9, ces circuits étant formés par exemple par des durits en caoutchouc vulcanisé aux peroxydes .This supply circuit 3 preferably comprises a heating tank 5 intended to be connected to the member 1 by an inlet circuit 7 and by a return circuit 9, these circuits being formed for example by rubber hoses vulcanized with peroxides.
Une pompe 11 actionnée par un moteur électrique 13 dont la vitesse peut varier au cours du temps, un débimètre 15, une première sonde de température 17 et une première sonde de pression 19 sont placés dans cet ordre en aval de la cuve de chauffage 5 sur le circuit d'arrivée 7.A pump 11 actuated by an electric motor 13 the speed of which can vary over time, a flow meter 15, a first temperature probe 17 and a first pressure probe 19 are placed in this order downstream of the heating tank 5 on the finish circuit 7.
Une deuxième sonde de pression 21 et un vase d'expansion 23 sont placés dans cet ordre en amont de la cuve de chauffage 5 sur le circuit de retour 9.A second pressure probe 21 and an expansion vessel 23 are placed in this order upstream of the heating tank 5 on the return circuit 9.
Une deuxième sonde de température 25 est placée sur la cuve de chauffage 5.A second temperature probe 25 is placed on the heating tank 5.
La précision du débimètre 15 est de préférence de l'ordre de 3%, et celle des sondes de température 17, 25 et des sondes de pression 19, 21 est de préférence de l'ordre de 1%.The accuracy of the flow meter 15 is preferably of the order of 3%, and that of the temperature probes 17, 25 and the pressure probes 19, 21 is preferably of the order of 1%.
Le moteur électrique 13, le débimètre 15, les sondes de température 17, 25 et les sondes de pression 19, 21 sont interfacées avec un ordinateur de commande 27 par l'intermédiaire de connexions électriques 29.The electric motor 13, the flow meter 15, the temperature probes 17, 25 and the pressure probes 19, 21 are interfaced with a control computer 27 by means of electrical connections 29.
Lorsqu'il est relié à l'organe à tester 1, le circuit 3 est rempli d'un liquide de refroidissement comprenant de préférence environ 40% d'eau désionisée et présentant de préférence une résistance électrique d'environ 750 KOhm.When it is connected to the member to be tested 1, the circuit 3 is filled with a coolant preferably comprising approximately 40% deionized water and preferably having an electrical resistance of approximately 750 KOhm.
Selon une variante possible, ce liquide refroidissement peut être pollué par certains composés chimiques tels que du chlorure de sodium et/ou par des particules solides telles que de la limaille de fer.According to a possible variant, this coolant can be polluted by certain chemical compounds such as sodium chloride and / or by solid particles such as iron filings.
De préférence également, le volume de ce liquide est situé dans une plage allant de 7 à 20 litres.Also preferably, the volume of this liquid is in a range from 7 to 20 liters.
Le procédé de dégradation accélérée selon l'invention va être à présent explicité lorsqu'il est appliqué à l'installation sus-décrite. L'ordinateur de commande 27 fait varier la vitesse du moteur électrique 13 dans le temps, de sorte que le débit de liquide de refroidissement circulant dans le circuit 3 et dans l'organe à- tester 1 (dans le sens de la flèche F) varie également dans le temps.The accelerated degradation process according to the invention will now be explained when it is applied to the above-described installation. The control computer 27 varies the speed of the electric motor 13 over time, so that the flow of coolant circulating in the circuit 3 and in the member to be tested 1 (in the direction of the arrow F) also varies over time.
De manière préférée, la vitesse du moteur électrique 13 varie de manière périodique et, de manière encore plus préférée, cette vitesse passe périodiquement d'une valeur nulle à une valeur maximale. De manière encore plus préférée, dans chaque période, la vitesse du moteur 13 est nulle pendant environ 2 minutes, puis maximale pendant environ 3 minutes .Preferably, the speed of the electric motor 13 varies periodically and, even more preferably, this speed changes periodically from a zero value to a maximum value. Even more preferably, in each period, the speed of the motor 13 is zero for approximately 2 minutes, then maximum for approximately 3 minutes.
De manière encore plus préférée, on fait passer la vitesse de ce moteur de la valeur nulle à la valeur maximale en une durée comprise entre 30 et 60 secondes.Even more preferably, the speed of this motor is changed from zero to the maximum value in a period of between 30 and 60 seconds.
De manière encore plus préférée, cette valeur maximale est adaptée pour engendrer un débit de liquide de refroidissement dans le circuit 3 et dans l'organe 1 qui est compris entre 2000 et 2500 1/h.Even more preferably, this maximum value is adapted to generate a flow of coolant in the circuit 3 and in the member 1 which is between 2000 and 2500 l / h.
Pendant ce temps, on fait fonctionner la cuve de chauffage 5 de manière que le liquide de refroidissement qui arrive à l'organe 1 soit porté à une température sensiblement constante située de préférence aux alentours de 95°C.During this time, the heating tank 5 is operated so that the coolant which reaches the member 1 is brought to a substantially constant temperature preferably around 95 ° C.
Selon une variante préférée, lors du démarrage initial des essais, on fait fonctionner la cuve 5 à faible puissance pour éviter de détériorer le liquide de refroidissement . Pendant les essais, le débimètre 15, les sondes de température 17, 25 et les sondes de pression 19, 21 effectuent des mesures qui sont traitées par l'ordinateur 27.According to a preferred variant, during the initial start of the tests, the tank 5 is operated at low power to avoid damaging the coolant. During the tests, the flow meter 15, the temperature probes 17, 25 and the pressure probes 19, 21 carry out measurements which are processed by the computer 27.
Comme on peut le comprendre à présent, le procédé selon l'invention reproduit de manière relativement fidèle les conditions auxquelles l'organe testé 1 sera soumis en pratique lorsqu' il sera installé dans un véhicule automobile.As can now be understood, the method according to the invention reproduces relatively faithful to the conditions to which the tested body 1 will be subjected in practice when it is installed in a motor vehicle.
En effet, les variations de débit de liquide de refroidissement induites par les variations de vitesse du moteur électrique 13 reproduisent de manière satisfaisante les variations de débit de liquide de refroidissement dans un véhicule liées aux variations de régime du moteur de ce véhicule. De même, le chauffage du liquide de refroidissement par la cuve 5 reproduit de manière satisfaisante le chauffage du liquide de refroidissement par le moteur thermique d'un véhicule.In fact, the variations in coolant flow induced by the variations in speed of the electric motor 13 satisfactorily reproduce the variations in coolant flow in a vehicle linked to variations in engine speed of this vehicle. Similarly, the heating of the coolant by the tank 5 satisfactorily reproduces the heating of the coolant by the heat engine of a vehicle.
Grâce à l'installation et au procédé sus-décrit, on réussit à perforer l'organe à tester 1 au bout de quelques centaines d'heures, contre plusieurs milliers dans la technique antérieure, sans qu'il soit forcément nécessaire d'utiliser un liquide de refroidissement pollué. La demanderesse pense que cette différence est due au fait que dans les régimes à débit variable, des phénomènes d' érosion deviennent prépondérants par rapport aux phénomènes de corrosion.Thanks to the installation and to the process described above, it is possible to perforate the organ to be tested 1 after a few hundred hours, against several thousand in the prior art, without it necessarily being necessary to use a polluted coolant. The Applicant believes that this difference is due to the fact that in variable flow regimes, erosion phenomena become preponderant compared to corrosion phenomena.
Ainsi, outre le gain de temps obtenu, l'installation et le procédé selon l'invention permettent de dégrader l'organe à tester selon un mode sensiblement conforme à celui effectivement constaté dans la réalité.Thus, in addition to the time saved, the installation and the method according to the invention make it possible to degrade the organ to be tested according to a mode substantially in accordance with that actually observed in reality.
Bien entendu, la présente invention n'est pas limitée au mode de réalisation décrit et représenté, fourni à titre d'exemple illustratif et non limitatif.Of course, the present invention is not limited to the embodiment described and shown, provided by way of illustrative and nonlimiting example.
C'est ainsi par exemple que l'on pourrait procéder aux essais sans chauffer le liquide de refroidissement. Dans ce cas cependant, on obtiendrait des résultats moins fidèles à la réalité. For example, the tests could be carried out without heating the coolant. In this case, however, results would be less faithful to reality.

Claims

REVENDICATIONS
1. Procédé de dégradation accélérée d'un organe (1) destiné à être traversé par du liquide de refroidissement dans un véhicule automobile -à propulsion thermique, dans lequel on fait circuler ledit liquide dans ledit organe (1), caractérisé en ce qu'on fait varier le débit dudit liquide dans le temps .1. Method for accelerated degradation of an organ (1) intended to be traversed by coolant in a motor vehicle - with thermal propulsion, in which said liquid is circulated in said organ (1), characterized in that the flow rate of said liquid is varied over time.
2. Procédé selon la revendication 1, caractérisé en ce qu'on fait varier ledit débit de manière périodique. 2. Method according to claim 1, characterized in that said flow varies periodically.
3. Procédé selon l'une des revendications 1 ou 2, caractérisé en ce qu'on fait varier ledit débit alternativement entre une valeur nulle et une valeur maximale.3. Method according to one of claims 1 or 2, characterized in that said flow varies alternately between a zero value and a maximum value.
4. Procédé selon les revendications 2 et 3, caractérisé en ce qu'on maintient ledit débit à ladite valeur nulle pendant environ 2 minutes, et en ce qu'on maintient ledit débit à ladite valeur maximale pendant environ 3 minutes.4. Method according to claims 2 and 3, characterized in that said flow is maintained at said zero value for about 2 minutes, and in that said flow is maintained at said maximum value for about 3 minutes.
5. Procédé selon l'une des revendications 3 ou 4, caractérisé en ce qu'on fait passer ledit débit de ladite valeur nulle à ladite valeur maximale en une durée comprise entre 30 et 60 secondes.5. Method according to one of claims 3 or 4, characterized in that said flow passes from said zero value to said maximum value in a period between 30 and 60 seconds.
6. Procédé selon l'une quelconque des revendications 3 à 5, caractérisé en ce que ladite valeur maximale est comprise entre 2000 et 2500 1/h.6. Method according to any one of claims 3 to 5, characterized in that said maximum value is between 2000 and 2500 1 / h.
7. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce qu'on chauffe ledit liquide de refroidissement.7. Method according to any one of the preceding claims, characterized in that the said cooling liquid is heated.
8. Procédé selon la revendication 7, caractérisé en ce qu'on maintient ledit liquide de refroidissement à une température sensiblement constante.8. Method according to claim 7, characterized in that said coolant is maintained at a substantially constant temperature.
9. Procédé selon la revendication 8, caractérisé en ce que ladite température est d'environ 95°C.9. Method according to claim 8, characterized in that said temperature is approximately 95 ° C.
10. Procédé selon l'une quelconque des revendications 7 à 9, caractérisé en ce qu'on chauffe lentement ledit liquide de refroidissement préalablement à toute manipulation.10. Method according to any one of claims 7 to 9, characterized in that it heats said coolant slowly before any manipulation.
11. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce qu'on mesure certains paramètres dudit liquide de refroidissement .11. Method according to any one of the preceding claims, characterized in that certain parameters of said cooling liquid are measured.
12. Procédé selon la revendication 11, caractérisé en ce que lesdits paramètres comprennent le débit dudit liquide de refroidissement, sa température et sa pression.12. Method according to claim 11, characterized in that said parameters include the flow rate of said coolant, its temperature and its pressure.
13. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il est mis en œuvre de manière automatique par des moyens informatiques (27) . 13. Method according to any one of the preceding claims, characterized in that it is implemented automatically by computer means (27).
14. Installation de mise en œuvre d'un procédé conforme à l'une quelconque des revendications précédentes pour tester un organe (1) destiné à être traversé par du liquide de refroidissement dans un véhicule automobile à moteur thermique, comprenant des moyens (3, 11) pour faire circuler ledit liquide de refroidissement dans ledit organe (1) , caractérisée en ce que lesdits moyens (3, 11) sont adaptés pour faire varier dans le temps le débit dudit liquide dans ledit organe14. Installation for implementing a method according to any one of the preceding claims for testing a member (1) intended to be traversed by coolant in a motor vehicle with an internal combustion engine, comprising means (3, 11) for circulating said coolant in said member (1), characterized in that said means (3, 11) are adapted to vary over time the flow rate of said liquid in said member
(D . (D.
15. Installation selon la revendication 14, caractérisée en ce que lesdits moyens comprennent un circuit d'alimentation (3) comportant une pompe (11) dont la vitesse peut être modulée au cours du temps.15. Installation according to claim 14, characterized in that said means comprise a supply circuit (3) comprising a pump (11) whose speed can be modulated over time.
16. Installation selon la revendication 15 pour la mise en œuvre d'un procédé conforme à la revendication 7, caractérisée en ce que ledit circuit d'alimentation (3) comprend une cuve de chauffage (5) destinée à être reliée audit organe (1) par un circuit d'arrivée (7) et par un circuit de retour (9) . 16. Installation according to claim 15 for the implementation of a method according to claim 7, characterized in that said supply circuit (3) comprises a heating tank (5) intended to be connected to said member (1 ) by an incoming circuit (7) and by a return circuit (9).
17. Installation selon la revendication 16, caractérisée en ce que ladite pompe (11) est placée sur ledit circuit d'arrivée (7).17. Installation according to claim 16, characterized in that said pump (11) is placed on said inlet circuit (7).
18. Installation selon- l'une des revendications 16 5 ou 17, caractérisée en ce qu'un vase d'expansion (23) est placé sur ledit circuit de retour (9) .18. Installation according to one of claims 16 5 or 17, characterized in that an expansion tank (23) is placed on said return circuit (9).
19. Installation selon l'une quelconque des revendications 16 à 18 pour la mise en œuvre d'un procédé conforme à la revendication 12, caractérisée en ce0 qu'elle comprend un débimètre (15) placé sur ledit circuit d'arrivée (7), une première sonde de température (17) placée sur ledit circuit d'arrivée (7), une deuxième sonde de température (25) placée sur ladite cuve de chauffage (5), une première sonde de pression (19) placée5 en aval dudit débimètre (15), et une deuxième sonde de pression (21) placée sur ledit circuit de retour (9) .19. Installation according to any one of claims 16 to 18 for the implementation of a method according to claim 12, characterized in ce0 that it comprises a flow meter (15) placed on said inlet circuit (7) , a first temperature probe (17) placed on said inlet circuit (7), a second temperature probe (25) placed on said heating tank (5), a first pressure probe (19) placed5 downstream of said flow meter (15), and a second pressure probe (21) placed on said return circuit (9).
20. Installation selon l'une quelconque des revendications 15 à 19 pour la mise en œuvre d'un procédé conforme à la revendication 13, caractérisée en ce qued ladite pompe (11) est interfacée avec un ordinateur de commande (27) .20. Installation according to any one of claims 15 to 19 for the implementation of a method according to claim 13, characterized in that said pump (11) is interfaced with a control computer (27).
21. Installation selon les revendications 19 et 20, caractérisée en ce que ledit débimètre (15), lesdites sondes de température (17, 25) et lesdites sondes de5 pression (19, 21) sont interfaces avec ledit ordinateur de commande (27) .21. Installation according to claims 19 and 20, characterized in that said flow meter (15), said temperature probes (17, 25) and said pressure probes (19, 21) are interfaces with said control computer (27).
22. Installation selon l'une quelconque des revendications 14 à 21 lorsqu'elle est reliée audit organe à tester (1), caractérisée en ce qu'elle est0 remplie dudit liquide de refroidissement.22. Installation according to any one of claims 14 to 21 when it is connected to said member to be tested (1), characterized in that it is filled with said cooling liquid.
23. Installation selon la revendication 22, caractérisée en ce que le volume dudit liquide de refroidissement est situé dans une plage allant de 7 à 20 litres. 23. Installation according to claim 22, characterized in that the volume of said coolant is located in a range from 7 to 20 liters.
24. Installation selon l'une des revendications 22 ou 23, caractérisée en ce que ledit liquide de refroidissement est concentré à environ 40% d'eau désionisée, et en ce que sa résistance électrique est d'environ 750 KOhm.24. Installation according to one of claims 22 or 23, characterized in that said coolant is concentrated to about 40% deionized water, and in that its electrical resistance is about 750 KOhm.
25. Installation selon l'une quelconque des revendications 22 à 24, caractérisée en ce que ledit liquide de refroidissement est pollué par certains composés chimiques tels que du chlorure de sodium. 25. Installation according to any one of claims 22 to 24, characterized in that said coolant is polluted by certain chemical compounds such as sodium chloride.
26. Installation selon l'une quelconque des revendications 22 à 25, caractérisée en ce que ledit liquide de refroidissement est pollué par des particules solides telles que de la limaille de fer. 26. Installation according to any one of claims 22 to 25, characterized in that said coolant is polluted by solid particles such as iron filings.
PCT/FR2001/000793 2000-03-22 2001-03-16 Method for accelerated degradation of an element designed to be run through by a cooling liquid in a vehicle, and installation therefor WO2001071305A1 (en)

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EP01917163A EP1266201A1 (en) 2000-03-22 2001-03-16 Method for accelerated degradation of an element designed to be run through by a cooling liquid in a vehicle, and installation therefor

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FR0003658A FR2806795B1 (en) 2000-03-22 2000-03-22 PROCESS FOR ACCELERATED DEGRADATION OF A MEMBER INTENDED TO BE CROSSED BY COOLING LIQUID IN A VEHICLE, AND INSTALLATION FOR CARRYING OUT SAID METHOD
FR00/03658 2000-03-22

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103323245A (en) * 2013-06-29 2013-09-25 中国人民解放军国防科学技术大学 Accelerated degradation test method of knuckle bearing

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4213474A (en) * 1979-08-03 1980-07-22 Frank Harrison Vehicle radiator cleaning and testing system
US4390049A (en) * 1978-05-22 1983-06-28 Albertson Robert V Apparatus for reciprocating liquid in a cooling system of an internal combustion engine
FR2552227A1 (en) * 1983-09-15 1985-03-22 Someth Sa Method and device for leak-testing the primary circuit of a refrigerating machine having a condensable refrigerant fluid
DE4039176A1 (en) * 1990-12-06 1992-06-11 Ver Energiewerke Ag Detecting and evaluating damaged pipes, e.g. in heat exchanger - by cooling pipes, circulating medium at different temp. and taking and evaluating infrared images
EP0894954A1 (en) * 1997-08-01 1999-02-03 C.R.F. Società Consortile per Azioni Cooling system for a motor-vehicle engine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4390049A (en) * 1978-05-22 1983-06-28 Albertson Robert V Apparatus for reciprocating liquid in a cooling system of an internal combustion engine
US4213474A (en) * 1979-08-03 1980-07-22 Frank Harrison Vehicle radiator cleaning and testing system
FR2552227A1 (en) * 1983-09-15 1985-03-22 Someth Sa Method and device for leak-testing the primary circuit of a refrigerating machine having a condensable refrigerant fluid
DE4039176A1 (en) * 1990-12-06 1992-06-11 Ver Energiewerke Ag Detecting and evaluating damaged pipes, e.g. in heat exchanger - by cooling pipes, circulating medium at different temp. and taking and evaluating infrared images
EP0894954A1 (en) * 1997-08-01 1999-02-03 C.R.F. Società Consortile per Azioni Cooling system for a motor-vehicle engine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103323245A (en) * 2013-06-29 2013-09-25 中国人民解放军国防科学技术大学 Accelerated degradation test method of knuckle bearing

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EP1266201A1 (en) 2002-12-18
FR2806795B1 (en) 2002-05-10

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