WO2019011576A1 - Method and device for applying a hydrophobic liquid to a pane of a motor vehicle - Google Patents

Method and device for applying a hydrophobic liquid to a pane of a motor vehicle Download PDF

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Publication number
WO2019011576A1
WO2019011576A1 PCT/EP2018/065843 EP2018065843W WO2019011576A1 WO 2019011576 A1 WO2019011576 A1 WO 2019011576A1 EP 2018065843 W EP2018065843 W EP 2018065843W WO 2019011576 A1 WO2019011576 A1 WO 2019011576A1
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WO
WIPO (PCT)
Prior art keywords
liquid
window
hydrophobic
vehicle
orifices
Prior art date
Application number
PCT/EP2018/065843
Other languages
French (fr)
Inventor
Gérald CAILLOT
Stéphane BOURSIER
Original Assignee
Valeo Systèmes d'Essuyage
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 Valeo Systèmes d'Essuyage filed Critical Valeo Systèmes d'Essuyage
Publication of WO2019011576A1 publication Critical patent/WO2019011576A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/46—Cleaning windscreens, windows or optical devices using liquid; Windscreen washers
    • B60S1/48—Liquid supply therefor
    • B60S1/481—Liquid supply therefor the operation of at least part of the liquid supply being controlled by electric means
    • B60S1/482—Liquid supply therefor the operation of at least part of the liquid supply being controlled by electric means combined with the operation of windscreen wipers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/46—Cleaning windscreens, windows or optical devices using liquid; Windscreen washers
    • B60S1/48—Liquid supply therefor
    • B60S1/481—Liquid supply therefor the operation of at least part of the liquid supply being controlled by electric means
    • B60S1/485—Liquid supply therefor the operation of at least part of the liquid supply being controlled by electric means including control systems responsive to external conditions, e.g. by detection of moisture, dirt or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/46—Cleaning windscreens, windows or optical devices using liquid; Windscreen washers
    • B60S1/48—Liquid supply therefor
    • B60S1/481—Liquid supply therefor the operation of at least part of the liquid supply being controlled by electric means
    • B60S1/486—Liquid supply therefor the operation of at least part of the liquid supply being controlled by electric means including control systems responsive to a vehicle driving condition, e.g. speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/46—Cleaning windscreens, windows or optical devices using liquid; Windscreen washers
    • B60S1/48—Liquid supply therefor
    • B60S1/52—Arrangement of nozzles; Liquid spreading means
    • B60S1/522—Arrangement of nozzles; Liquid spreading means moving liquid spreading means, e.g. arranged in wiper arms
    • B60S1/524—Arrangement of nozzles; Liquid spreading means moving liquid spreading means, e.g. arranged in wiper arms arranged in wiper blades

Definitions

  • the technical field of the present invention is that of the processes for applying a liquid to a window of a vehicle, in particular an automobile, by using a device for washing this window.
  • a device for washing this window is more particularly intended to be installed on a windshield of the vehicle.
  • Automobiles are commonly equipped with washers to wipe and wash the windshield and to prevent the driver's vision from being disturbed.
  • Such an installation generally comprises two wiper blades which scrape the outer surface of the windshield so as to evacuate the water present on this surface.
  • such systems are equipped with a reservoir containing a windshield washer fluid, called first fluid, of a system of pipes connecting the reservoir to orifices through which the first liquid can be ejected on the windshield, and a pump adapted to circulate the first liquid in the piping system until it is expelled through the orifices on the windshield.
  • first fluid a windshield washer fluid
  • the two tanks may each have their pump but are connected to the same system of pipes carrying the first and second liquids to the orifices through which they are ejected on the windshield.
  • Patents are already known describing precisely methods of applying liquid to a window of a vehicle.
  • patent FR-B1-2,991,261 describes a strategy for applying windshield washer fluid by means of the wiper system of the vehicle.
  • the present invention makes it possible to remedy this need simply, efficiently and economically.
  • the invention relates to a method for applying a liquid to a window of a motor vehicle by using a washing device comprising: at least one reservoir containing said liquid,
  • At least one wiper blade capable of moving on the window
  • said liquid being a hydrophobic liquid
  • said liquid comprises a step of projecting hydrophobic liquid onto said windowpane by means of the pipe and pump systems when said vehicle is stationary.
  • the invention thus proposes to use vehicle equipment for projecting hydrophobic liquid on a window of the vehicle, and this at a convenient time namely to stop the vehicle.
  • the application and spreading of the hydrophobic product on the glass can take place without the intervention of the user, who can simply be content to control the process remotely.
  • This command can be performed from the vehicle dashboard or remotely for example by means of an application of a mobile phone or tablet.
  • this method makes it possible to regularly renew the hydrophobic treatment of the vehicle window without requiring manual work from a person. It therefore saves time compared to current methods of applying hydrophobic product.
  • the fact that the system is remotely controllable allows the user to treat his vehicle even when away from it.
  • hydrophobic liquid is understood to mean a liquid which is capable of rendering a hydrophobic surface after spreading, or even drying, of the liquid on this surface.
  • the liquid can be used to improve the state of this surface.
  • the method according to the invention may comprise one or more of the following steps or characteristics, taken separately from each other or in combination with each other:
  • said level of hydrophobicity is given by a coefficient of friction between said at least one wiper blade and said window pane;
  • the hydrophobic liquid is projected downstream of said at least one wiper blade, relative to its / their direction of movement; said window is made of glass or of hydrophobic plastic material, such as polycarbonate.
  • the invention further relates to a device for washing a window of a motor vehicle, comprising:
  • At least one wiper blade adapted to move on the window, characterized in that said at least one reservoir contains a hydrophobic liquid, and in that said device is configured so that hydrophobic liquid is projected onto said window glass by means of piping and pump systems when said vehicle is stationary.
  • FIG. 1 is a schematic view of a washing device of a windshield of a motor vehicle
  • the method of application of the invention uses a washing device 1 applied to a windshield 10 of a motor vehicle as illustrated in FIG.
  • a washing device comprises a first reservoir 2 containing a first fluid and a second reservoir 3 comprising a second fluid.
  • the first fluid is for example a washer fluid.
  • the second fluid is a hydrophobic liquid, that is to say a liquid immiscible with water. It is known to use such a liquid to hydrophobicize the outer surface of a window or a body of a vehicle.
  • the hydrophobic liquids it is possible for example to use mainly chemical compounds of the family of silicones, and more specifically hydroxyl-terminated PDMS PolydDiMethylSiloxane.
  • the washing device 1 also comprises a piping system 5 connecting the first reservoir 2 and the second reservoir 3 to orifices 15 through which the first fluid and / or the second fluid are ejected on the windshield 10.
  • a pump system 20 for circulating first fluid and / or second fluid in the piping system 5 to ejection through the orifices 15.
  • the pump system 20 here comprises two independent pumps 21, 22.
  • a first pump 21 is associated with the first reservoir 2 and is intended to circulate first fluid in the piping system 5 and a second pump 22 is associated with the second reservoir 3 and is intended to circulate the second fluid in the piping system 5.
  • the washing device 1 comprises at least one wiper blade 30 mounted on an arm 31 and able to move on the windshield 10 between a low position PB and a high position PH.
  • the washing device 1 of FIG. 1 comprises two wiper blades 30.
  • the aforementioned orifices 15 are for example located on the wiper blades 30. They may also be located on the arm 31 and / or on the connection means from broom to arm. Alternatively, the orifices 15 could be located elsewhere, and for example on the hood of the vehicle.
  • the orifices 15 may be arranged so as to project the first fluid and / or the second fluid upwards from the wiping brushes 30, that is to say towards the top of the windshield 10.
  • the orifices 15 may be arranged to project the first fluid and / or the second fluid down the wiper blades 30, that is to say towards the bottom of the windshield 10.
  • the orifices 15 are advantageously arranged in the form of ramps , that is to say, one or more alignments of successive orifices.
  • Each wiper blade 30 may for example comprise at least one ramp.
  • the or each ramp of a broom 30 can be supplied with fluid via one or two pipes of the pipe system 5.
  • a ramp can for example be connected to two supply lines of the broom. first and second fluids, respectively.
  • a ramp may be connected to a single supply line of the brush first and second fluids, the same pipe thus serving to supply the brush with the two fluids, in a sequenced manner.
  • the washing device 1 also comprises a motor 40 for driving the wiping brushes 30 between their low positions PB and their respective high positions PH.
  • the washing device 1 further comprises at least one sensor 50. It is located here on an upper part of the windshield, in the center of it. It is particularly located at an area of the windshield 10 swept by only one of the two wiper blades 30.
  • the washing device 1 further comprises an electronic box 60 capable of analyzing the data coming from the sensor 50 and of controlling the motor 40 for driving the wiper blades 30 and the activation of the pump system 20, the first and second pumps 21, 22 can be controlled independently.
  • the sensor 50 is for example a rain sensor, a windscreen opacity sensor and / or a light sensor.
  • the washing device comprises a single partitioned tank and having two compartments 2 ', 3' respective storage windshield washer fluid and hydrophobic liquid.
  • Each compartment 2 ', 3' is associated with a pump 21, 22 connected to the piping system 5.
  • the method according to the invention allows to achieve automatically or by simple decision of the user hydrophobic treatment of the windshield of the vehicle and this effectively.
  • the system is optionally remotely controllable via an application of a mobile phone or tablet for example or can be programmed to be performed at night or when the user desires.
  • the system comprises all the elements enabling the treatment of at least one window of the vehicle independently.
  • this system makes it possible to regularly renew the hydrophobic treatment of the windshield of the vehicle without ask for the manual work of a person. It therefore saves time compared to current methods of applying hydrophobic product.
  • the fact that the system is controllable allows the user to treat his vehicle even when away from it.
  • the invention thus proposes a method for applying a liquid to a window of a motor vehicle by using a washing device comprising the steps of projecting hydrophobic liquid on the window when the vehicle is stopped. .
  • the wiper blades 30 are then preferably stationary.
  • the hydrophobic liquid is preferably projected downstream of the brushes relative to their direction of movement.
  • the projection of water-repellent liquid on the window occurs when the vehicle stops.
  • the method proposes a first step of measuring a value representative of a level of hydrophobicity of the window, then a stage of projection of hydrophobic liquid on the window as soon as possible. this value is above or below a threshold value.
  • the level of hydrophobicity can be given by a coefficient of friction between the brushes and the glass.
  • the coefficient of friction is preferably calculated on a dry pane. This coefficient of friction is for example determined from the friction torque of the blade on the window.
  • the means configured to measure the friction torque of the blade on the window or the coefficient of friction of the blade on the window are well known to those skilled in the art. This is for example means configured to measure the power consumption or the output torque of the motor 40.
  • the treated pane may be made of glass or hydrophobic plastic material, such as polycarbonate.
  • the treatment makes it possible to render its outer surface hydrophobic or to "regenerate” its hydrophobic state.
  • the treatment makes it possible to improve its surface state and thus to facilitate the sliding of the brushes on this window.

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  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Abstract

The invention relates to a method for applying a liquid to a pane of a motor vehicle using a washing device (1) comprising: at least one container containing said liquid; a channel system (5) connecting the or each container to openings (15) via which the liquid is ejected onto the pane; a pump system (21, 22) for circulating the liquid in the channel system until it is ejected via the above-mentioned openings; and at least one wiper blade (30) that can move over the pane. Said method is characterised in that, said liquid being a hydrophobic liquid, it comprises a step of projecting hydrophobic liquid over said pane by means of the channel and pump systems when the vehicle is stopped.

Description

Procédé et dispositif pour l'application d'un liquide hydrophobe sur une vitre d'un véhicule automobile  Method and device for applying a hydrophobic liquid on a window of a motor vehicle
DOMAINE TECHNIQUE TECHNICAL AREA
Le domaine technique de la présente invention est celui des procédés d'application d'un liquide sur une vitre d'un véhicule, notamment automobile, en utilisant un dispositif de lavage de cette vitre. Un tel dispositif est plus particulièrement destiné à être installé sur un pare-brise du véhicule.  The technical field of the present invention is that of the processes for applying a liquid to a window of a vehicle, in particular an automobile, by using a device for washing this window. Such a device is more particularly intended to be installed on a windshield of the vehicle.
ETAT DE L'ART  STATE OF THE ART
Les automobiles sont couramment équipées de dispositifs de lavage pour assurer un essuyage et un lavage du pare-brise et éviter que la vision qu'a le conducteur de son environnement soit perturbée. Une telle installation comprend généralement deux balais d'essuyage qui raclent la surface extérieure du pare-brise de manière à évacuer l'eau présente sur cette surface.  Automobiles are commonly equipped with washers to wipe and wash the windshield and to prevent the driver's vision from being disturbed. Such an installation generally comprises two wiper blades which scrape the outer surface of the windshield so as to evacuate the water present on this surface.
Dans le but de laver le pare-brise, notamment en absence de pluie, de tels systèmes sont équipés d'un réservoir contenant un liquide lave-glace, dit premier liquide, d'un système de canalisations reliant le réservoir à des orifices par lesquels le premier liquide peut être éjecté sur le pare-brise, et d'une pompe apte à faire circuler le premier liquide dans le système de canalisations jusqu'à ce qu'il soit expulsé par les orifices sur le pare-brise.  In order to wash the windshield, especially in the absence of rain, such systems are equipped with a reservoir containing a windshield washer fluid, called first fluid, of a system of pipes connecting the reservoir to orifices through which the first liquid can be ejected on the windshield, and a pump adapted to circulate the first liquid in the piping system until it is expelled through the orifices on the windshield.
Dans le but d'améliorer la qualité du nettoyage, notamment en cas de salissure importante du pare-brise, et/ou d'ajouter d'autres fonctions au système de nettoyage comme par exemple le dégivrage du pare-brise, il est connu de prévoir un deuxième réservoir contenant un liquide actif, dit deuxième liquide, ayant des propriétés de nettoyage supérieures et/ou des propriétés de dégivrage.  In order to improve the quality of the cleaning, especially in the event of significant contamination of the windshield, and / or to add other functions to the cleaning system, for example the defrosting of the windshield, it is known to providing a second reservoir containing an active liquid, said second liquid, having superior cleaning properties and / or de-icing properties.
Les deux réservoirs peuvent posséder chacun leur pompe mais sont reliés au même système de canalisations emmenant le premier et le deuxième liquides jusqu'aux orifices par lesquels ils sont éjectés sur le pare-brise. Ainsi, lorsque l'on veut passer de la projection d'un des liquides sur le pare-brise à la projection de l'autre des liquides, on désactive la pompe qui fonctionnait et on active l'autre pompe. On connaît déjà des brevets décrivant avec précision des méthodes d'application de liquide sur une vitre d'un véhicule. Par exemple, le brevet FR- B1 -2 991 261 décrit une stratégie d'application de liquide lave-glace grâce au système d'essuyage du véhicule. The two tanks may each have their pump but are connected to the same system of pipes carrying the first and second liquids to the orifices through which they are ejected on the windshield. Thus, when one wants to go from the projection of one of the liquids on the windshield to the projection of the other liquids, it turns off the pump that was working and the other pump is activated. Patents are already known describing precisely methods of applying liquid to a window of a vehicle. For example, patent FR-B1-2,991,261 describes a strategy for applying windshield washer fluid by means of the wiper system of the vehicle.
On connaît par ailleurs des moyens permettant de rendre hydrophobes les vitres des véhicules automobiles. Il s'agit de produits présentant des caractéristiques hydrophobes, produits que l'on appellera traitements hydrophobes. L'utilisation d'un traitement hydrophobe sur une vitre d'un véhicule automobile est connue.  Also known means for rendering hydrophobic windows of motor vehicles. These are products with hydrophobic characteristics, products that will be called hydrophobic treatments. The use of a hydrophobic treatment on a window of a motor vehicle is known.
Dans la technique actuelle, il est nécessaire d'appliquer ce type de traitement à la main à l'aide d'une éponge ou d'un chiffon prévu à cet effet, comme le présente la demande de brevet US-A1 -2014/272148. Cette demande décrit une méthode d'application d'un produit hydrophobe grâce à une pulvérisation par spray ou avec un chiffon imbibé.  In the current art, it is necessary to apply this type of treatment by hand using a sponge or a cloth provided for this purpose, as presented in US-A1-2014/272148 patent application. . This application describes a method of applying a hydrophobic product by spraying with a spray or with a soaked cloth.
Cependant, il n'existe actuellement pas de procédé d'application de traitement hydrophobe sur une vitre d'un véhicule de façon efficace et sans nécessiter l'intervention d'une personne. Il n'existe pas non plus de procédé automatisé d'application d'un tel traitement car le moment opportun d'application du traitement n'a pas été déterminé.  However, there is currently no method of applying hydrophobic treatment on a window of a vehicle efficiently and without requiring the intervention of a person. There is also no automated method of applying such a treatment because the timely application of the treatment has not been determined.
La présente invention permet de remédier à ce besoin de façon simple, efficace et économique.  The present invention makes it possible to remedy this need simply, efficiently and economically.
EXPOSE DE L'INVENTION  SUMMARY OF THE INVENTION
L'invention concerne un procédé d'application d'un liquide sur une vitre d'un véhicule automobile par utilisation d'un dispositif de lavage comprenant : - au moins un réservoir contenant ledit liquide,  The invention relates to a method for applying a liquid to a window of a motor vehicle by using a washing device comprising: at least one reservoir containing said liquid,
- un système de canalisations reliant le ou chaque réservoir à des orifices par lesquels sont éjectés le liquide sur la vitre,  a system of pipes connecting the or each tank to orifices through which the liquid is ejected on the window,
- un système de pompe destiné à faire circuler le liquide dans le système de canalisations jusqu'à éjection par les orifices précités, et  a pump system for circulating the liquid in the piping system to ejection through the aforementioned orifices, and
- au moins un balai d'essuyage apte à se déplacer sur la vitre, at least one wiper blade capable of moving on the window,
procédé caractérisé en ce que, ledit liquide étant un liquide hydrophobe, il comprend une étape consistant à projeter du liquide hydrophobe sur ladite vitre au moyen des systèmes de canalisations et de pompe lorsque ledit véhicule est à l'arrêt. characterized in that, said liquid being a hydrophobic liquid, it comprises a step of projecting hydrophobic liquid onto said windowpane by means of the pipe and pump systems when said vehicle is stationary.
L'invention propose ainsi d'utiliser des équipements du véhicule pour projeter du liquide hydrophobe sur une vitre du véhicule, et ce à un moment opportun à savoir à l'arrêt du véhicule. Ainsi, l'application et l'étalement du produit hydrophobe sur la vitre peuvent avoir lieu sans intervention de l'utilisateur, qui peut simplement se contenter de commander le procédé à distance. Cette commande peut être réalisée depuis le tableau de bord du véhicule ou bien de façon déportée par exemple au moyen d'une application d'un téléphone portable ou d'une tablette. Contrairement à la technique actuelle, ce procédé permet de renouveler régulièrement le traitement hydrophobe de la vitre du véhicule sans demander de travail manuel d'une personne. Il permet donc un gain de temps par rapport aux méthodes actuelles d'application de produit hydrophobe. Le fait que le système soit commandable à distance permet à l'utilisateur de traiter son véhicule même en étant éloigné de ce dernier.  The invention thus proposes to use vehicle equipment for projecting hydrophobic liquid on a window of the vehicle, and this at a convenient time namely to stop the vehicle. Thus, the application and spreading of the hydrophobic product on the glass can take place without the intervention of the user, who can simply be content to control the process remotely. This command can be performed from the vehicle dashboard or remotely for example by means of an application of a mobile phone or tablet. In contrast to the current technique, this method makes it possible to regularly renew the hydrophobic treatment of the vehicle window without requiring manual work from a person. It therefore saves time compared to current methods of applying hydrophobic product. The fact that the system is remotely controllable allows the user to treat his vehicle even when away from it.
Dans la présente demande, on entend par liquide hydrophobe, un liquide qui est apte à rendre une surface hydrophobe après étalement, voire séchage, du liquide sur cette surface. Lorsque le liquide hydrophobe est déposé sur une surface déjà hydrophobe, le liquide peut être utilisé pour améliorer l'état de cette surface.  In the present application, hydrophobic liquid is understood to mean a liquid which is capable of rendering a hydrophobic surface after spreading, or even drying, of the liquid on this surface. When the hydrophobic liquid is deposited on an already hydrophobic surface, the liquid can be used to improve the state of this surface.
Le procédé selon l'invention peut comprendre une ou plusieurs des étapes ou caractéristiques suivantes, prises isolément les unes des autres ou en combinaison les unes avec les autres :  The method according to the invention may comprise one or more of the following steps or characteristics, taken separately from each other or in combination with each other:
- mesure d'une valeur représentative d'un niveau d'hydrophobie de ladite vitre, et projection de liquide hydrophobe sur ladite vitre dès que ladite valeur est au- dessus ou au-dessous d'une valeur seuil ; measuring a value representative of a level of hydrophobicity of said window, and projection of hydrophobic liquid on said window as soon as said value is above or below a threshold value;
- ledit niveau d'hydrophobie est donné par un coefficient de friction entre ledit au moins un balai d'essuyage et ladite vitre ;  said level of hydrophobicity is given by a coefficient of friction between said at least one wiper blade and said window pane;
- à l'arrêt du véhicule, ledit au moins un balai d'essuyage est immobile ; - When stopping the vehicle, said at least one wiper blade is stationary;
- le liquide hydrophobe est projeté en aval dudit au moins un balai d'essuyage, par rapport à son/leur sens de déplacement ; - ladite vitre est en verre ou en matériau plastique hydrophobe, tel qu'en polycarbonate. - The hydrophobic liquid is projected downstream of said at least one wiper blade, relative to its / their direction of movement; said window is made of glass or of hydrophobic plastic material, such as polycarbonate.
L'invention concerne en outre un dispositif de lavage d'une vitre d'un véhicule automobile, comprenant :  The invention further relates to a device for washing a window of a motor vehicle, comprising:
- au moins un réservoir, - at least one tank,
- un système de canalisations reliant le ou chaque réservoir à des orifices par lesquels sont éjectés le liquide sur la vitre,  a system of pipes connecting the or each tank to orifices through which the liquid is ejected on the window,
- un système de pompe destiné à faire circuler le liquide dans le système de canalisations jusqu'à éjection par les orifices précités, et  a pump system for circulating the liquid in the piping system to ejection through the aforementioned orifices, and
- au moins un balai d'essuyage apte à se déplacer sur la vitre, caractérisé en ce que ledit au moins un réservoir contient un liquide hydrophobe, et en ce que ledit dispositif est configuré pour que du liquide hydrophobe soit projeté sur ladite vitre au moyen des systèmes de canalisations et de pompe lorsque ledit véhicule est à l'arrêt. at least one wiper blade adapted to move on the window, characterized in that said at least one reservoir contains a hydrophobic liquid, and in that said device is configured so that hydrophobic liquid is projected onto said window glass by means of piping and pump systems when said vehicle is stationary.
DESCRIPTION DES FIGURES  DESCRIPTION OF THE FIGURES
D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description qui suit d'exemples de réalisation donnés à titre illustratif en référence aux figures annexées. Sur ces figures :  Other characteristics and advantages of the invention will appear on reading the following description of exemplary embodiments given by way of illustration with reference to the appended figures. In these figures:
- la figure 1 est une vue schématique d'un dispositif de lavage d'un pare-brise de véhicule automobile ;  - Figure 1 is a schematic view of a washing device of a windshield of a motor vehicle;
- la figure 2 illustre une variante de réalisation du dispositif de lavage.  - Figure 2 illustrates an alternative embodiment of the washing device.
DESCRIPTION DETAILLEE  DETAILED DESCRIPTION
Le procédé d'application de l'invention utilise un dispositif de lavage 1 appliqué sur un pare-brise 10 de véhicule automobile tel qu'illustré à la figure 1 . Dans l'exemple représenté, un tel dispositif de lavage comprend un premier réservoir 2 contenant un premier fluide et un deuxième réservoir 3 comprenant un deuxième fluide. Le premier fluide est par exemple un liquide lave-glace. Le deuxième fluide est un liquide hydrophobe, c'est-à-dire un liquide non miscible avec de l'eau. Il est connu d'utiliser un tel liquide pour rendre hydrophobe la surface extérieure d'une vitre ou d'une carrosserie d'un véhicule. Parmi les liquides hydrophobes, on peut par exemple utiliser principalement des composés chimiques de la famille des silicones, et plus précisément des PDMS PolydDiMéthylSiloxane à terminaison hydroxylée. The method of application of the invention uses a washing device 1 applied to a windshield 10 of a motor vehicle as illustrated in FIG. In the example shown, such a washing device comprises a first reservoir 2 containing a first fluid and a second reservoir 3 comprising a second fluid. The first fluid is for example a washer fluid. The second fluid is a hydrophobic liquid, that is to say a liquid immiscible with water. It is known to use such a liquid to hydrophobicize the outer surface of a window or a body of a vehicle. Among the hydrophobic liquids, it is possible for example to use mainly chemical compounds of the family of silicones, and more specifically hydroxyl-terminated PDMS PolydDiMethylSiloxane.
Le dispositif de lavage 1 comprend également un système de canalisations 5 reliant le premier réservoir 2 et le deuxième réservoir 3 à des orifices 15 par lesquels sont éjectés du premier fluide et/ou du deuxième fluide sur le pare-brise 10. Il comprend en outre un système de pompes 20 destiné à faire circuler du premier fluide et/ou du deuxième fluide dans le système de canalisations 5 jusqu'à éjection par les orifices 15. Le système de pompe 20 comprend ici deux pompes 21 , 22 indépendantes. Une première pompe 21 est associée au premier réservoir 2 et est destinée à faire circuler du premier fluide dans le système de canalisations 5 et une deuxième pompe 22 est associée au deuxième réservoir 3 et est destinée à faire circuler du deuxième fluide dans le système de canalisations 5.  The washing device 1 also comprises a piping system 5 connecting the first reservoir 2 and the second reservoir 3 to orifices 15 through which the first fluid and / or the second fluid are ejected on the windshield 10. a pump system 20 for circulating first fluid and / or second fluid in the piping system 5 to ejection through the orifices 15. The pump system 20 here comprises two independent pumps 21, 22. A first pump 21 is associated with the first reservoir 2 and is intended to circulate first fluid in the piping system 5 and a second pump 22 is associated with the second reservoir 3 and is intended to circulate the second fluid in the piping system 5.
Le dispositif de lavage 1 comprend au moins un balai d'essuyage 30 monté sur un bras 31 et apte à se déplacer sur le pare-brise 10 entre une position basse PB et une position haute PH. Le dispositif de lavage 1 de la figure 1 comprend deux balais d'essuyage 30. Les orifices 15 précités sont par exemple situés sur les balais d'essuyage 30. Ils peuvent également être situés sur le bras 31 et/ou sur les moyens de connexion du balai au bras. En variante, les orifices 15 pourraient être situés ailleurs, et par exemple sur le capot du véhicule.  The washing device 1 comprises at least one wiper blade 30 mounted on an arm 31 and able to move on the windshield 10 between a low position PB and a high position PH. The washing device 1 of FIG. 1 comprises two wiper blades 30. The aforementioned orifices 15 are for example located on the wiper blades 30. They may also be located on the arm 31 and / or on the connection means from broom to arm. Alternatively, the orifices 15 could be located elsewhere, and for example on the hood of the vehicle.
Les orifices 15 peuvent être disposés de manière à projeter du premier fluide et/ou du deuxième fluide vers le haut des balais d'essuyage 30, c'est-à- dire vers le haut du pare-brise 10. Les orifices 15 peuvent être disposés de manière à projeter du premier fluide et/ou du deuxième fluide vers le bas des balais d'essuyage 30, c'est-à-dire vers le bas du pare-brise 10. Les orifices 15 sont avantageusement disposés sous forme de rampes, c'est-à-dire d'un ou plusieurs alignements d'orifices successifs. Chaque balai d'essuyage 30 peut par exemple comprendre au moins une rampe.  The orifices 15 may be arranged so as to project the first fluid and / or the second fluid upwards from the wiping brushes 30, that is to say towards the top of the windshield 10. The orifices 15 may be arranged to project the first fluid and / or the second fluid down the wiper blades 30, that is to say towards the bottom of the windshield 10. The orifices 15 are advantageously arranged in the form of ramps , that is to say, one or more alignments of successive orifices. Each wiper blade 30 may for example comprise at least one ramp.
La ou chaque rampe d'un balai 30 peut être alimentée en fluide par l'intermédiaire d'une ou deux conduites du système de canalisations 5. Une rampe peut par exemple être reliée à deux conduites d'alimentation du balai en premier et second fluides, respectivement. En variante, une rampe peut être reliée à une seule conduite d'alimentation du balai en premier et second fluides, une même conduite servant donc à l'alimentation du balai avec les deux fluides, de manière séquencée. The or each ramp of a broom 30 can be supplied with fluid via one or two pipes of the pipe system 5. A ramp can for example be connected to two supply lines of the broom. first and second fluids, respectively. Alternatively, a ramp may be connected to a single supply line of the brush first and second fluids, the same pipe thus serving to supply the brush with the two fluids, in a sequenced manner.
Le dispositif de lavage 1 comprend également un moteur 40 destiné à entraîner les balais d'essuyage 30 entre leurs positions basses PB et leurs positions hautes PH respectives. Le dispositif de lavage 1 comprend en outre au moins un capteur 50. Il est situé ici sur une partie haute du pare-brise, au centre de celui-ci. Il est notamment situé au niveau d'une zone du pare-brise 10 balayée par un seul des deux balais d'essuyage 30.  The washing device 1 also comprises a motor 40 for driving the wiping brushes 30 between their low positions PB and their respective high positions PH. The washing device 1 further comprises at least one sensor 50. It is located here on an upper part of the windshield, in the center of it. It is particularly located at an area of the windshield 10 swept by only one of the two wiper blades 30.
Le dispositif de lavage 1 comprend de plus un boîtier électronique 60 capable d'analyser les données issues du capteur 50 et de commander le moteur 40 d'entraînement des balais d'essuyage 30 et l'activation du système de pompe 20, les première et deuxième pompes 21 , 22 pouvant être commandées de manière indépendante. Le capteur 50 est par exemple un capteur de pluie, un capteur d'opacité du pare-brise et/ou un capteur de lumière.  The washing device 1 further comprises an electronic box 60 capable of analyzing the data coming from the sensor 50 and of controlling the motor 40 for driving the wiper blades 30 and the activation of the pump system 20, the first and second pumps 21, 22 can be controlled independently. The sensor 50 is for example a rain sensor, a windscreen opacity sensor and / or a light sensor.
Dans la variante représentée à la figure 2, le dispositif de lavage comprend un seul réservoir cloisonné et comportant deux compartiments 2', 3' de stockage respectif de liquide lave-glace et de liquide hydrophobe. Chaque compartiment 2', 3' est associé à une pompe 21 , 22 reliée au système de canalisations 5.  In the variant shown in Figure 2, the washing device comprises a single partitioned tank and having two compartments 2 ', 3' respective storage windshield washer fluid and hydrophobic liquid. Each compartment 2 ', 3' is associated with a pump 21, 22 connected to the piping system 5.
Le procédé selon l'invention permet de réaliser de manière automatique ou par simple décision de l'utilisateur un traitement hydrophobe du pare-brise du véhicule et ce de façon efficace. Le système est éventuellement commandable à distance via une application d'un téléphone portable ou d'une tablette par exemple ou peut être programmé pour être réalisé de nuit ou lorsque l'utilisateur le désire. Le système comprend tous les éléments permettant de réaliser le traitement d'au moins une vitre du véhicule de façon autonome.  The method according to the invention allows to achieve automatically or by simple decision of the user hydrophobic treatment of the windshield of the vehicle and this effectively. The system is optionally remotely controllable via an application of a mobile phone or tablet for example or can be programmed to be performed at night or when the user desires. The system comprises all the elements enabling the treatment of at least one window of the vehicle independently.
Contrairement à la technique actuelle, ce système permet de renouveler régulièrement le traitement hydrophobe du pare-brise du véhicule sans demander le travail manuel d'une personne. Il permet donc un gain de temps par rapport aux méthodes actuelles d'application de produit hydrophobe. Le fait que le système soit commandable permet à l'utilisateur de traiter son véhicule même en étant éloigné de ce dernier. Unlike the current technique, this system makes it possible to regularly renew the hydrophobic treatment of the windshield of the vehicle without ask for the manual work of a person. It therefore saves time compared to current methods of applying hydrophobic product. The fact that the system is controllable allows the user to treat his vehicle even when away from it.
L'invention propose ainsi un procédé d'application d'un liquide sur une vitre d'un véhicule automobile par utilisation d'un dispositif de lavage comprenant des étapes consistant à projeter du liquide hydrophobe sur la vitre lorsque le véhicule est à l'arrêt. Les balais d'essuyage 30 sont alors de préférence immobiles. Dans le cas contraire où les balais sont en cours de déplacement, le liquide hydrophobe est de préférence projeté en aval des balais par rapport à leur sens de déplacement.  The invention thus proposes a method for applying a liquid to a window of a motor vehicle by using a washing device comprising the steps of projecting hydrophobic liquid on the window when the vehicle is stopped. . The wiper blades 30 are then preferably stationary. In the opposite case where the brushes are being moved, the hydrophobic liquid is preferably projected downstream of the brushes relative to their direction of movement.
Comme évoqué dans ce qui précède, la projection de liquide hydrofuge sur la vitre a lieu à l'arrêt du véhicule. Pour déterminer si du liquide hydrophobe doit effectivement être projeté sur la vitre, le procédé propose une première étape de mesure d'une valeur représentative d'un niveau d'hydrophobie de la vitre, puis une étape de projection de liquide hydrophobe sur la vitre dès que cette valeur est au-dessus ou au-dessous d'une valeur seuil.  As mentioned in the foregoing, the projection of water-repellent liquid on the window occurs when the vehicle stops. In order to determine whether hydrophobic liquid must actually be projected on the window, the method proposes a first step of measuring a value representative of a level of hydrophobicity of the window, then a stage of projection of hydrophobic liquid on the window as soon as possible. this value is above or below a threshold value.
A titre d'exemple, le niveau d'hydrophobie peut être donné par un coefficient de friction entre les balais et la vitre. Le coefficient de friction est de préférence calculé sur une vitre sèche. Ce coefficient de friction est par exemple déterminé à partir du couple de frottement du balai sur la vitre. Les moyens configurés pour mesurer le couple de frottement du balai sur la vitre ou le coefficient de friction du balai sur la vitre sont bien connus de l'homme du métier. Il s'agit par exemple de moyens configurés pour mesurer la consommation de puissance ou le couple de sortie du moteur 40.  For example, the level of hydrophobicity can be given by a coefficient of friction between the brushes and the glass. The coefficient of friction is preferably calculated on a dry pane. This coefficient of friction is for example determined from the friction torque of the blade on the window. The means configured to measure the friction torque of the blade on the window or the coefficient of friction of the blade on the window are well known to those skilled in the art. This is for example means configured to measure the power consumption or the output torque of the motor 40.
La vitre 10 traitée peut être en verre ou en matériau plastique hydrophobe, tel qu'en polycarbonate. Dans le cas d'un verre, le traitement permet de rendre sa surface extérieure hydrophobe ou de « régénérer » son état hydrophobe. Dans le cas d'un matériau hydrophobe, le traitement permet d'améliorer son état de surface et donc de faciliter la glisse des balais sur cette la vitre.  The treated pane may be made of glass or hydrophobic plastic material, such as polycarbonate. In the case of a glass, the treatment makes it possible to render its outer surface hydrophobic or to "regenerate" its hydrophobic state. In the case of a hydrophobic material, the treatment makes it possible to improve its surface state and thus to facilitate the sliding of the brushes on this window.

Claims

REVENDICATIONS
1 . Procédé d'application d'un liquide sur une vitre d'un véhicule automobile par utilisation d'un dispositif de lavage (1 ) comprenant : 1. A method of applying a liquid to a window of a motor vehicle by using a washing device (1) comprising:
- au moins un réservoir (2, 3) contenant ledit liquide, at least one reservoir (2, 3) containing said liquid,
- un système de canalisations (5) reliant le ou chaque réservoir à des orifices (15) par lesquels sont éjectés le liquide sur la vitre (10),  a piping system (5) connecting the or each reservoir to orifices (15) through which the liquid is ejected on the window (10),
- un système de pompe (20) destiné à faire circuler le liquide dans le système de canalisations (5) jusqu'à éjection par les orifices (15) précités, et  a pump system (20) for circulating the liquid in the piping system (5) to ejection through said orifices (15), and
- au moins un balai d'essuyage (30) apte à se déplacer sur la vitre (10), procédé caractérisé en ce que, ledit liquide étant un liquide hydrophobe, il comprend une étape consistant à projeter du liquide hydrophobe sur ladite vitre au moyen des systèmes de canalisations et de pompe lorsque ledit véhicule est à l'arrêt. - At least one wiper blade (30) adapted to move on the window (10), characterized in that, said liquid being a hydrophobic liquid, it comprises a step of projecting hydrophobic liquid on said window glass by means of piping and pump systems when said vehicle is stationary.
2. Procédé selon la revendication 1 , dans lequel il comprend des étapes de : The method of claim 1, wherein it comprises steps of:
- mesure d'une valeur représentative d'un niveau d'hydrophobie de ladite vitre, et  measuring a value representative of a level of hydrophobicity of said window, and
- projection de liquide hydrophobe sur ladite vitre dès que ladite valeur est au- dessus ou au-dessous d'une valeur seuil. - Hydrophobic liquid projection on said window as soon as said value is above or below a threshold value.
3. Procédé selon la revendication précédente, caractérisé en ce que ledit niveau d'hydrophobie est donné par un coefficient de friction entre ledit au moins un balai d'essuyage (30) et ladite vitre (10). 3. Method according to the preceding claim, characterized in that said hydrophobicity level is given by a coefficient of friction between said at least one wiper blade (30) and said window (10).
4. Procédé selon l'une des revendications précédentes, caractérisé en ce que, à l'arrêt du véhicule, ledit au moins un balai d'essuyage (30) est immobile. 4. Method according to one of the preceding claims, characterized in that, at the stop of the vehicle, said at least one wiper blade (30) is stationary.
5. Procédé selon l'une des revendications précédentes, caractérisé en ce que le liquide hydrophobe est projeté en aval dudit au moins un balai d'essuyage, par rapport à son/leur sens de déplacement. 5. Method according to one of the preceding claims, characterized in that the hydrophobic liquid is projected downstream of said at least one wiper blade, relative to its / their direction of movement.
6. Procédé selon l'une des revendications précédentes, caractérisé en ce que ladite vitre est en verre ou en matériau plastique hydrophobe, tel qu'en polycarbonate. 6. Method according to one of the preceding claims, characterized in that said window is glass or hydrophobic plastic material, such as polycarbonate.
7. Dispositif de lavage d'une vitre d'un véhicule automobile, comprenant :7. Device for washing a window of a motor vehicle, comprising:
- au moins un réservoir (2, 3), at least one tank (2, 3),
- un système de canalisations (5) reliant le ou chaque réservoir à des orifices (15) par lesquels sont éjectés le liquide sur la vitre (10),  a piping system (5) connecting the or each reservoir to orifices (15) through which the liquid is ejected on the window (10),
- un système de pompe (20) destiné à faire circuler le liquide dans le système de canalisations (5) jusqu'à éjection par les orifices (15) précités, et a pump system (20) for circulating the liquid in the piping system (5) to ejection through said orifices (15), and
- au moins un balai d'essuyage (30) apte à se déplacer sur la vitre (10), caractérisé en ce que ledit au moins un réservoir contient un liquide hydrophobe, et en ce que ledit dispositif est configuré pour que du liquide hydrophobe soit projeté sur ladite vitre au moyen des systèmes de canalisations et de pompe lorsque ledit véhicule est à l'arrêt.  at least one wiper blade (30) able to move on the pane (10), characterized in that said at least one reservoir contains a hydrophobic liquid, and in that said device is configured so that hydrophobic liquid is projected on said window by means of the pipe and pump systems when said vehicle is stationary.
PCT/EP2018/065843 2017-07-12 2018-06-14 Method and device for applying a hydrophobic liquid to a pane of a motor vehicle WO2019011576A1 (en)

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FR1756593A FR3068938B1 (en) 2017-07-12 2017-07-12 METHOD AND DEVICE FOR APPLYING A HYDROPHOBIC LIQUID TO A GLASS OF A MOTOR VEHICLE
FR1756593 2017-07-12

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