WO2015082326A1 - Fluidic coupling for a vehicle windshield wiper system - Google Patents

Fluidic coupling for a vehicle windshield wiper system Download PDF

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Publication number
WO2015082326A1
WO2015082326A1 PCT/EP2014/075897 EP2014075897W WO2015082326A1 WO 2015082326 A1 WO2015082326 A1 WO 2015082326A1 EP 2014075897 W EP2014075897 W EP 2014075897W WO 2015082326 A1 WO2015082326 A1 WO 2015082326A1
Authority
WO
WIPO (PCT)
Prior art keywords
fluid
fluidic connection
cannula
spraying
wiper
Prior art date
Application number
PCT/EP2014/075897
Other languages
French (fr)
Inventor
Gérald CAILLOT
Vincent Izabel
Jean-Michel Jarasson
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 WO2015082326A1 publication Critical patent/WO2015082326A1/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
    • B60S1/04—Wipers or the like, e.g. scrapers
    • B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
    • B60S1/38—Wiper blades
    • B60S1/3848—Flat-type wiper blade, i.e. without harness
    • B60S1/3849—Connectors therefor; Connection to wiper arm; Attached to blade
    • B60S1/3862—Transport of liquid there through
    • 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
    • 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
    • B60S1/04—Wipers or the like, e.g. scrapers
    • B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
    • B60S1/38—Wiper blades
    • B60S1/3803—Wiper blades heated wiper blades
    • B60S1/3805—Wiper blades heated wiper blades electrically

Definitions

  • the present invention relates to a fluid connection for a vehicle wiper system, in particular an automobile.
  • the windscreen wiper systems may include means for spraying windscreen fluid on the windshield. These projection means may be located on the hood, on the windshield bay grille or, in a more recent version, on the windscreen wiper blades, this in particular for flat-blade or flat blade brushes. In English, that is to say, for the brooms having by themselves a bend allowing them to be mounted on the arms without the intermediary of stirrups or pedals.
  • the windshield washer fluid is conveyed to the projection means, such as nozzles, by pipes fixed to the arm and connected by a fluid connection to an integrated liquid distribution system.
  • the connector of the blade this connector for establishing an articulated connection between the arm and the blade.
  • Patent application FR 2 971 470 of the applicant describes a fluid connection of this type.
  • the connection comprises cannulas each having a tubular inlet end configured to be connected to a liquid line and an outlet tubular end configured to be connected to the mop connector.
  • the pipe is equipped with electric heating conductors, or resistive wires, which allow to warm up or de-ice the washer fluid in the pipe.
  • the heating conductors are electrically connected to form a conductive heating loop extending at least partially in the vicinity of the connection cannulas for warm them up too.
  • the fluid supply of the brush can cause a significant increase in the pressure of the liquid in the liquid supply means of the brush, and can cause degradation of these means as well as leaks. This can also cause annoyance of the driver, the latter no longer able to clean his windshield despite the fact that it activates its cleaning command.
  • the present invention provides a simple, effective and economical solution to at least some of these problems.
  • the invention proposes a fluid connection for a vehicle wiper system comprising at least one cannula having at least one tubular inlet end configured to be connected to a fluid conduit and a tubular outlet end configured to be connected to a connector of a wiper blade, characterized in that it comprises at least one fluid spraying means which is in fluid communication with said cannula.
  • the fluidic connection according to the invention is thus equipped with a fluid spraying means, and in particular a washing liquid, which was not the case in the prior art.
  • a fluid spraying means and in particular a washing liquid, which was not the case in the prior art.
  • the fluid connection and the pipe connected to this connection are generally mounted in the drive arm of the blade and are thus more protected from the cold relative to the blade. It is therefore conceivable that the projection means of the broom fear more freeze and clog more easily than the spraying means or means of the fluid connection according to the invention.
  • the fluidic connection may include two independent fluid spraying means. It may comprise two cannulas which are each in fluid communication with one of the two spraying means.
  • One of the spraying means may be configured to spray fluid on one side of the wiper and the other spraying means may be configured to spray fluid on the opposite side of the wiper.
  • the liquid spray is controlled so that the liquid is projected in the direction of movement of the brush.
  • the or each spray means may comprise a nozzle projecting on the or each cannula.
  • these nozzles can extend in substantially opposite directions.
  • the nozzles are located on opposite sides of the cannulas and are cut by a plane passing through the longitudinal axes of the tubular inlet ends of the cannulas.
  • the or each spray means may comprise an orifice.
  • the or each spraying means is equipped with a valve configured to move from a closed position of the spraying means to a release position of this means. In the closed position, the valve closes the spray means which is not operational and can not spray fluid. In the release position, the spraying means is operational and can spray fluid.
  • the valve is preferably configured to be actuated by fluid pressure in the cannula. It can be configured to move from the shutter position to the release position when the fluid pressure in the cannula is greater than a predetermined value.
  • the tubular outlet end of the or each cannula may comprise interlocking means of the male type.
  • the fluidic connection is thus a male connector.
  • the connector may comprise fastening means configured to cooperate with corresponding means of a drive arm of a wiper blade.
  • the connection according to the invention is thus intended to be carried by the arm and not by the wiper of the wiper system.
  • the present invention also relates to a fluidic connection device for the wiper system of the vehicle, characterized in that it comprises a fluidic connection as described below. and at least one fluid line connected to the tubular inlet end of the or cannula of the fluidic connection.
  • the device further comprises heating conductors that extend partly along the conduit and a portion of which is configured to form a conductive heating loop extending proximate the or each cannula of the fluidic connection.
  • This heating loop also makes it possible to heat, for example by conduction, the one or more spraying means of the fluidic connection.
  • the fluidic connection is then equipped with means (s) for spraying heated fluid (s).
  • the present invention also relates to a vehicle wiper system, characterized in that it comprises a fluidic connection as described above and a windscreen wiper blade, this blade comprising a connector comprising connecting means at the tubular outlet end of the or each cannula of the fluidic connection.
  • the wiper further comprises fluid projection means connected by at least one channel to said connecting means. This broom may not include heating / defrosting means.
  • the present invention finally relates to a method of spraying fluid by means of a wiper system as described above, characterized in that it comprises
  • a ' in normal operation, spraying fluid only by the wiper blade projecting means, throughout the fluid supply period of the fluidic connection, and b ') in emergency operation where at least one of said projection means, said at least one channel, and said connection means of the wiper blade, is at least partially blocked by the gel or by impurities, spraying fluid through the or each spraying means of the fluidic connection, throughout the fluid supply period of the fluid connection.
  • Stage a) of the process may correspond to the case where the spraying means or means of the fluidic connection are not equipped with valves as described in the foregoing. Conversely, steps a ') and b') may correspond to the case where the spraying means or means of the fluidic coupling are equipped with such valves. It is then understood that the spraying means equipped with these valves are intended to be used only in emergency cases, in which the spraying of liquid by the broom projection means is not possible.
  • FIG. 1 is a schematic perspective view of a vehicle windscreen wiper system which comprises means for supplying windscreen wiper liquid with ice liquid,
  • FIG. 2 is a sectional view of a washing liquid line of the system of FIG. 1,
  • FIG. 3 is a perspective view of a fluid connection device and a connector of a windscreen wiper blade
  • FIG. 4 comprises a schematic perspective view of the connection device of FIG. 3 and a front view of the wiper blade connector of FIG. 3, said pipe and said connector being disconnected
  • - Figure 5 is a schematic perspective view of a fluid connection device according to the invention.
  • FIG. 1 a windshield wiper system of a vehicle, in particular automobile.
  • This system comprises a windshield wiper blade 10 and a drive arm 12 which is partially shown and intended to be driven by a motor to follow a back-and-forth angular movement to evacuate the water. and possibly other undesirable elements covering the windshield.
  • the blade 10 comprises a longitudinal body 14, a scraper blade 16 generally made of rubber, and at least one internal vertebra (not visible) which gives a bend to the blade 16 so as to promote the application of this blade on the windshield.
  • the body 14 of the blade 10 comprises an upper baffle for improving the operation of the wiper system, the purpose of this deflector being to improve the plating of the blade on the windshield and therefore the aerodynamic performance of the system.
  • the blade 10 further comprises hooks or hooking clips 20 of the blade 16 and the vertebra on the body, these clips 20 being located at each of the longitudinal ends of the body 14.
  • the body 14 of the brush is here made in two independent parts which are arranged substantially end to end and connected to one another by an intermediate connector 22 (shown in Figure 3).
  • This connector 22 is interposed between the two parts of the body 14 and comprises means 24 for attachment to these parts, for example by interlocking.
  • the wiper system comprises an adapter (not visible) mounted on the connector 22 and allowing an articulation of the blade 10 relative to the arm 12.
  • the articulation of the blade 10 relative to the arm 12 is a hinge in a rotational movement about an axis of rotation Y perpendicular to the longitudinal axis of the blade 10.
  • the blade 10 must in fact have at least one degree of freedom in rotation by compared to the arm 12, and more specifically with respect to an end piece 26 of the arm 12, to allow the blade 10 to follow the curvature of the windshield.
  • the adapter and the connector 22 are articulated in rotation to one another about an axis perpendicular to the blade.
  • the blade 10 comprises means (not shown) for spraying windscreen washer fluid, such as spray bars, which are supplied with washing liquid by a fluidic connection device comprising a fluid connection 30 and a fluidic connection device 30.
  • a fluidic connection device comprising a fluid connection 30 and a fluidic connection device 30.
  • pipe 32 only the pipe being visible in FIG.
  • the wiper blade 10 is here equipped with two spray bars which are located on each side of the blade.
  • Each ramp is provided with a nozzle or a multitude of nozzles or pressurized watering orifices, allowing the distribution of the washer fluid on the windshield.
  • These irrigation ramps can be advantageously arranged in the baffle.
  • the windshield wiper fluid is sent only to the front part of the wiper, ie the windshield wiper fluid is sent to the spray boom located on the side of which the arm of the wiper blade is moving. during a rising phase of the scan and on the other side during the downward phase of the scan.
  • This arrangement makes it possible to wipe the washer fluid instantly after it has been deposited on the glass surface, thus eliminating any interval during which the vision could have been reduced.
  • the pipe 32 comprises a sleeve 34 extruded from two circulation channels 36a, 36b and comprises two heating conductors 37a, 37b embedded in the mass of the sleeve 34.
  • the sleeve 34 is of material flexible, for example rubber.
  • the circulation channels 36a, 36b of the washer fluid and the heating conductors 37a, 37b are obtained, for example, by means of extrusion: Heating conductors 37a, 37b are introduced with the extruded sleeve material.
  • the section of the sleeve 34 has for example a general shape in eight and the heating conductors 37a, 37b are aligned centrally between the circulation channels 36a, 36b.
  • the heating conductors 37a, 37b and the circulation channels 36a, 36b are longitudinally substantially parallel to each other.
  • the heating conductors 37a, 37b are sheathed and comprise, for example, a heating resistive wire or wires connected to heating elements, so that the washer fluid taken from the reservoir by the pump (s) towards the ramp respective watering is reheated when the heating conductors 37a, 37b are fed.
  • the washer fluid is heated in the first circulation channel 36a of the pipe 32 and feeds the first spray bar of the wiper blade 10.
  • the second circulation channel 36b feeds the second spray bar of the wiper blade 10.
  • the heated windshield wiper fluid participates in defrosting the windshield.
  • the pipe 32 is connected to the connector 22 of the brush through the fluid connector 30 which is here a male connector. It is also noted that this connector 30 carries a male electrical connector 39 to be electrically connected to the connector 22 of the brush.
  • the electrical connector 39 has two electrical plugs 40 for the electrical supply of the heating elements of the blade 10. It can also be envisaged that the connector 30 does not carry such a connector 39, that is to say that the pipe 32 is heated but not the wiper blade 10.
  • the fluidic connection 30 comprises two cannulas 41a, 41b.
  • Each cannula 41a, 41b has a tubular shape having an inlet 42a, 42b and an outlet 43a, 43b between which the washer fluid can circulate.
  • the cannulas 41a, 41b have a portion bent between one end straight tubular inlet and a straight tubular end outlet.
  • the cannulas 41a, 41b are independent circulation channels, held together by reinforcing crosspieces.
  • the tubular inlet ends of the cannulas 42a, 42b are inserted into the circulation channels 36a, 36b of the sleeve 34 so as to ensure the fluid connection between the circulation channels 36a, 36b and the cannulas 41a, 41b.
  • the connector 22 of the brush 10 comprises a female connector portion which is intended to cooperate with the connector 30 to ensure the fluid connection of the washer fluid.
  • the connector 22 thus has two inlet ports 44a, 44b in which the tubular outlet ends 43a, 43b of the cannulas 41a, 41b can be inserted.
  • the connector 22 of the blade comprises an electrical base having two electrical ports 45a, 45b can cooperate with the electrical plugs 40 of the electrical connector 39 to provide the electrical connection for the power supply of the power supply. heating elements of the windscreen wiper blade.
  • Maintaining the electrical and fluidic connection is achieved by removable mechanical holding means of the connector 30 and the connector 39, which cooperate with complementary means of the connector 22 of the brush.
  • the heating conductors 37a, 37b are electrically connected together to form a heating conductive loop extending out of the sleeve 34, the conductive loop is disposed at least partially in the vicinity of the cannulas 41a, 41b of the connector 30 while remaining preferably remote from the outlets 43a, 43b of the cannulas.
  • the heating conductors 37a, 37b are intended to be connected to a power supply on the other side of the sleeve 34. This takes advantage of the presence of the heating conductors 37a, 37b embedded in the sleeve 34 to also heat the connection 30 without requiring intermediate electrical connectors, or additional electric cables, ie without additional cost using existing means. This ensures a continuity of the heating of the washing liquid in the heating and transport pipe to the outlets of the liquid coupling.
  • FIG. 5 represents an embodiment of the fluidic connection 30 'according to the invention, the elements already described in the foregoing being referenced by the same numbers in this figure to facilitate understanding of the invention.
  • the connector 30 ' comprises at least one means for spraying washing liquid.
  • the connector 30 ' which comprises two cannulas 41a, 41b supplying two spray bars of a wiper blade 10, respectively, is equipped with two spray means 50 independent, each of these means 50 being in fluid communication with one of the cannulas 41a, 41b for its washing liquid supply.
  • the spraying means 50 of each cannula 41a, 41b here comprises a nozzle projecting from the cannula, and more specifically the spraying means 50 is located near the bent portion of the cannulas 41a, 41b. As shown, the spraying means 50 may be located on the right inlet tubular end 42a, 42b of the cannula.
  • the jets of the cannulas 41a, 41b may extend in substantially opposite directions. They may be located substantially in the same plane passing through the longitudinal axes of the straight tubular ends 42a, 42b of the cannulas.
  • Each nozzle comprises a washing fluid spray orifice 51 which is connected by an internal channel 52 to the internal passage 53 of the cannula, this channel 52 forming a bypass of this passage 53 for the supply of washing liquid from the nozzle.
  • the windshield washer fluid supply of the brush 10 through the pipe 32 and the coupling 30 ' causes the windscreen fluid to spray on the windshield via the nozzles. It is possible, however, to equip the sprinklers with valves intended to close the orifices 51 of the nozzles when the spraying of liquid by the nozzles is not desired. This is for example the case when the ramps of the broom 10 work properly. It is then not necessary to spray more liquid through the jets of the fitting 30 '.
  • each nozzle is equipped with a movable valve which is able to move from a closed position of the orifice 51 to a release position thereof, this displacement being preferably caused by the pressure of the washer fluid inside the fitting 30 '.
  • the valve is for example configured to move from the closed position to the release position when the pressure of the liquid in the cannula 41a, 41b is greater than a predetermined value, as described in the foregoing.
  • the valve of each nozzle comprises for example a ball urged by a compression spring against a seat extending around the orifice 51 of the nozzle, the force exerted by the spring on the ball opposing that exerted by the liquid on the marble.
  • the stiffness of the spring is thus preferably determined so that it compresses and the ball moves away from its seat when the pressure of the liquid in the corresponding cannula becomes abnormal, for example when the liquid outlet openings of the fed ramp. by this cannula are closed off by the gel or by impurities and that the liquid pressure in the connection 30 'increases because the pump continues to supply the connection liquid.
  • the aforesaid value of pressure from which the valve is intended to be actuated is of the order of 3 bar, this value may in particular vary as a function of the pressure delivered by the pump. .
  • the present invention also provides a method of spraying washing liquid by means of a wiper system as described above.
  • this method can comprise a step consisting, in normal operation, in spraying liquid through the spray bars of the wiper blade as well as through the nozzles (without valves) of the fluid connection, during the entire fluid supply period of the connection fluidics.
  • the method comprises the steps of, in normal operation, spraying liquid by the ramps of the wiper, during the entire fluid supply period of the fluidic connection, and, in emergency operation where the gel or impurities impede or prevent the liquid from being sprayed by the broom, by spraying liquid only through the nozzles (equipped with valves) of the fluidic connection, throughout the fluid supply period of the fluidic connection.
  • the fluidic connection according to the invention may belong to a windscreen wiper system, the brushes of which do not have a washer fluid projection ramp.
  • the connection 30 'connected to the fluid line 32 is the only means of spraying windshield washer fluid.
  • the fluidic connection according to the invention can belong to a wiper system without a brush heating system (as previously described) and / or a heating system of the fluid line 32.

Abstract

Fluidic coupling (30') for a vehicle windshield wiper system, comprising at least one cannula (41 a, 41 b) having at least one tubular inlet end (42a, 42b) configured to be coupled to a fluid pipe (32) and a tubular outlet end (43a, 43b) configured to be coupled to a connector (22) of a windshield wiper (10), characterized in that it comprises at least one fluid-spray means (50) in fluidic communication with said cannula.

Description

RACCORD FLUIDIQUE POUR SYSTEME D'ESSUIE-GLACE DE  FLUID CONNECTION FOR WINDSCREEN WIPER SYSTEM
VEHICULE  VEHICLE
DOMAINE TECHNIQUE TECHNICAL AREA
La présente invention concerne un raccord fluidique pour un système d'essuie-glace de véhicule, en particulier automobile.  The present invention relates to a fluid connection for a vehicle wiper system, in particular an automobile.
ETAT DE L'ART  STATE OF THE ART
Les automobiles sont couramment équipées de systèmes d'essuie- glace pour assurer un essuyage et un lavage du pare-brise et éviter que la vision qu'a le conducteur de son environnement ne soit perturbée. Ces systèmes comprennent des bras effectuant un mouvement de va-et-vient angulaire, au bout desquels sont installés des balais d'essuie-glace allongés, porteurs eux-mêmes de lames racleuses réalisées en une matière élastique. Les lames frottent contre le pare-brise et évacuent l'eau en l'amenant en dehors du champ de vision du conducteur.  Automobiles are commonly equipped with wiper systems to wipe and wash the windshield and to prevent the driver's vision from being disturbed. These systems comprise angularly reciprocating arms, at the end of which are installed elongated wiper blades, themselves carrying scraper blades made of an elastic material. The blades rub against the windshield and drain the water away from the driver's field of vision.
Les systèmes d'essuie-glace peuvent comprendre des moyens de projection de liquide lave glace sur le pare-brise. Ces moyens de projection peuvent être situés sur le capot, sur la grille de baie de pare-brise ou, dans une version plus récente, sur les balais d'essuie-glace, ceci en particulier pour les balais de type plat ou « flat blade » en anglais, c'est-à-dire, pour les balais présentant par eux-mêmes un cintrage leur permettant d'être montés sur les bras sans l'intermédiaire d'étriers ou de palonniers.  The windscreen wiper systems may include means for spraying windscreen fluid on the windshield. These projection means may be located on the hood, on the windshield bay grille or, in a more recent version, on the windscreen wiper blades, this in particular for flat-blade or flat blade brushes. In English, that is to say, for the brooms having by themselves a bend allowing them to be mounted on the arms without the intermediary of stirrups or pedals.
Dans le cas de moyens de projection intégrés au balai, le liquide lave- glace est acheminé jusqu'aux moyens de projection, tels que des buses, par des conduites fixées au bras et raccordées par un raccord fluidique à un système de distribution du liquide intégré au connecteur du balai, ce connecteur permettant d'établir une liaison articulée entre le bras et le balai.  In the case of projection means integrated in the wiper, the windshield washer fluid is conveyed to the projection means, such as nozzles, by pipes fixed to the arm and connected by a fluid connection to an integrated liquid distribution system. the connector of the blade, this connector for establishing an articulated connection between the arm and the blade.
La demande de brevet FR 2 971 470 de la demanderesse décrit un raccord fluidique de ce type. Le raccord comporte des canules présentant chacune une extrémité tubulaire d'entrée configurée pour être raccordée à une conduite de liquide et une extrémité tubulaire de sortie configurée pour être raccordée au connecteur du balai. La conduite est équipée de conducteurs électriques chauffants, ou fils résistifs, qui permettent de réchauffer voire de dégivrer le liquide lave glace dans la conduite. Pour éviter l'apparition d'une zone froide dans le raccord fluidique, la demande de brevet précitée prévoit que les conducteurs chauffants sont électriquement raccordés pour former une boucle conductrice de chauffage s'étendant au moins partiellement à proximité des canules du raccord en vue de les réchauffer également. Patent application FR 2 971 470 of the applicant describes a fluid connection of this type. The connection comprises cannulas each having a tubular inlet end configured to be connected to a liquid line and an outlet tubular end configured to be connected to the mop connector. The pipe is equipped with electric heating conductors, or resistive wires, which allow to warm up or de-ice the washer fluid in the pipe. To avoid the appearance of a cold zone in the fluidic connection, the aforementioned patent application provides that the heating conductors are electrically connected to form a conductive heating loop extending at least partially in the vicinity of the connection cannulas for warm them up too.
Dans la technique actuelle, lorsque le balai d'essuie-glace n'est pas équipé de moyens de chauffage/dégivrage, ses moyens de projection peuvent se boucher en cas de gel. Dans ce cas, même si la conduite et le raccord fluidique d'alimentation en liquide lave glace du balai sont chauffés, il n'est pas possible de pulvériser du liquide sur le pare-brise car les moyens de projection du balai ne sont pas opérationnels.  In the current technique, when the windscreen wiper blade is not equipped with heating / deicing means, its projection means can become clogged in case of frost. In this case, even if the pipe and the fluidic fluid supply connection of the wiper blade are heated, it is not possible to spray liquid on the windshield because the broom projection means are not operational. .
Par ailleurs, lorsque les moyens de projection du balai sont bouchés par des impuretés, il n'est pas non plus possible de pulvériser du liquide sur le pare-brise par ses moyens de projection.  Moreover, when the projection means of the brush are clogged with impurities, it is also not possible to spray liquid on the windshield by its projection means.
Dans ces deux cas où les moyens de projection du balai sont bouchés, l'alimentation en fluide du balai peut provoquer une augmentation significative de la pression du liquide dans les moyens d'alimentation en liquide du balai, et peut entraîner une dégradation de ces moyens ainsi que des fuites. Ceci peut également occasionner une gêne du conducteur, ce dernier ne parvenant plus à nettoyer son pare-brise malgré le fait qu'il active sa commande de nettoyage.  In these two cases where the projection means of the brush are clogged, the fluid supply of the brush can cause a significant increase in the pressure of the liquid in the liquid supply means of the brush, and can cause degradation of these means as well as leaks. This can also cause annoyance of the driver, the latter no longer able to clean his windshield despite the fact that it activates its cleaning command.
La présente invention propose une solution simple, efficace et économique à au moins une partie de ces problèmes.  The present invention provides a simple, effective and economical solution to at least some of these problems.
EXPOSE DE L'INVENTION  SUMMARY OF THE INVENTION
L'invention propose un raccord fluidique pour système d'essuie- glace de véhicule, comportant au moins une canule présentant au moins une extrémité tubulaire d'entrée configurée pour être raccordée à une conduite de fluide et une extrémité tubulaire de sortie configurée pour être raccordée à un connecteur d'un balai d'essuie-glace, caractérisé en ce qu'il comprend au moins un moyen de pulvérisation de fluide qui est en communication fluidique avec ladite canule. The invention proposes a fluid connection for a vehicle wiper system comprising at least one cannula having at least one tubular inlet end configured to be connected to a fluid conduit and a tubular outlet end configured to be connected to a connector of a wiper blade, characterized in that it comprises at least one fluid spraying means which is in fluid communication with said cannula.
Le raccord fluidique selon l'invention est ainsi équipé d'un moyen de pulvérisation de fluide, et en particulier d'un liquide lave glace, ce qui n'était pas le cas dans la technique antérieure. Ceci est particulièrement avantageux car cela permet de pulvériser du liquide lave glace sur le pare- brise même lorsque les moyens de projection de liquide du balai sont bouchés par le gel ou des impuretés. Le raccord fluidique et la conduite raccordée à ce raccord sont en général montés dans le bras d'entraînement du balai et sont ainsi protégés davantage du froid par rapport au balai. Il est donc envisageable que les moyens de projection du balai craignent plus le gel et se bouchent plus facilement que le ou les moyens de pulvérisation du raccord fluidique selon l'invention.  The fluidic connection according to the invention is thus equipped with a fluid spraying means, and in particular a washing liquid, which was not the case in the prior art. This is particularly advantageous since it makes it possible to spray windscreen washer fluid even when the liquid-spraying means of the brush are plugged by the gel or impurities. The fluid connection and the pipe connected to this connection are generally mounted in the drive arm of the blade and are thus more protected from the cold relative to the blade. It is therefore conceivable that the projection means of the broom fear more freeze and clog more easily than the spraying means or means of the fluid connection according to the invention.
Le raccord fluidique peut comprendre deux moyens de pulvérisation de fluide indépendants. Il peut comprendre deux canules qui sont chacune en communication fluidique avec l'un des deux moyens de pulvérisation.  The fluidic connection may include two independent fluid spraying means. It may comprise two cannulas which are each in fluid communication with one of the two spraying means.
L'un des moyens de pulvérisation peut être configuré pour pulvériser du fluide sur un côté du balai et l'autre moyen de pulvérisation peut être configuré pour pulvériser du fluide sur le côté opposé du balai. Dans un tel cas, la pulvérisation de liquide est pilotée de manière à ce que le liquide soit projeté selon le sens de déplacement du balai.  One of the spraying means may be configured to spray fluid on one side of the wiper and the other spraying means may be configured to spray fluid on the opposite side of the wiper. In such a case, the liquid spray is controlled so that the liquid is projected in the direction of movement of the brush.
Le ou chaque moyen de pulvérisation peut comprendre un gicleur en saillie sur la ou chaque canule. Dans le cas où le raccord est équipé de deux canules et deux gicleurs, ces gicleurs peuvent s'étendre dans des directions sensiblement opposées. En variante ou en caractéristique additionnelle, les gicleurs sont situés sur des côtés opposés des canules et sont coupés par un plan passant par les axes longitudinaux des extrémités tubulaires d'entrée des canules.  The or each spray means may comprise a nozzle projecting on the or each cannula. In the case where the connection is equipped with two cannulas and two nozzles, these nozzles can extend in substantially opposite directions. Alternatively or additional feature, the nozzles are located on opposite sides of the cannulas and are cut by a plane passing through the longitudinal axes of the tubular inlet ends of the cannulas.
Le ou chaque moyen de pulvérisation peut comprendre un orifice. Avantageusement, le ou chaque moyen de pulvérisation est équipé d'un clapet configuré pour se déplacer d'une position d'obturation du moyen de pulvérisation à une position de libération de ce moyen. En position d'obturation, le clapet ferme le moyen de pulvérisation qui n'est donc pas opérationnel et ne peut pas pulvériser du fluide. En position de libération, le moyen de pulvérisation est opérationnel et peut pulvériser du fluide. The or each spray means may comprise an orifice. Advantageously, the or each spraying means is equipped with a valve configured to move from a closed position of the spraying means to a release position of this means. In the closed position, the valve closes the spray means which is not operational and can not spray fluid. In the release position, the spraying means is operational and can spray fluid.
Le clapet est de préférence configuré pour être actionné par la pression du fluide dans la canule. Il peut être configuré pour se déplacer de la position d'obturation à la position de libération lorsque la pression du fluide dans la canule est supérieure à une valeur prédéterminée.  The valve is preferably configured to be actuated by fluid pressure in the cannula. It can be configured to move from the shutter position to the release position when the fluid pressure in the cannula is greater than a predetermined value.
Ceci est particulièrement avantageux car cela permet de remédier au problème précité de bouchage des moyens de projection ou de circulation de liquide du balai. Du fait de ce bouchage, l'alimentation en liquide du balai provoque une augmentation de la pression du liquide dans le raccord fluidique. Lorsque cette pression est supérieure à une valeur qui est prédéterminée pour correspondre à ce cas de bouchage (par le gel ou par des impuretés) par exemple, le clapet est actionné et passe de sa position d'obturation à sa position de libération. Le fonctionnement du clapet est ainsi autonome et dépend de la pression du liquide dans le raccord fluidique.  This is particularly advantageous because it overcomes the aforementioned problem of clogging the projection means or liquid circulation of the brush. Because of this clogging, the liquid supply of the brush causes an increase in the pressure of the liquid in the fluid connection. When this pressure is greater than a value which is predetermined to correspond to this case of clogging (by the gel or by impurities) for example, the valve is actuated and moves from its closed position to its release position. The operation of the valve is thus autonomous and depends on the pressure of the liquid in the fluid connection.
L'extrémité tubulaire de sortie de la ou de chaque canule peut comprendre des moyens d'emboîtement du type mâle. Le raccord fluidique est ainsi un raccord mâle.  The tubular outlet end of the or each cannula may comprise interlocking means of the male type. The fluidic connection is thus a male connector.
Le raccord peut comprendre des moyens de fixation configurés pour coopérer avec des moyens correspondants d'un bras d'entraînement d'un balai d'essuie-glace. Le raccord selon l'invention est ainsi destiné à être porté par le bras et non pas par le balai du système d'essuyage.  The connector may comprise fastening means configured to cooperate with corresponding means of a drive arm of a wiper blade. The connection according to the invention is thus intended to be carried by the arm and not by the wiper of the wiper system.
La présente invention concerne également un dispositif de raccordement fluidique pour système d'essuie-glace du véhicule, caractérisé en ce qu'il comprend un raccord fluidique tel que décrit ci- dessus et au moins une conduite de fluide raccordée à l'extrémité tubulaire d'entrée de la ou d'une canule du raccord fluidique. De préférence, le dispositif comporte en outre des conducteurs chauffants qui s'étendent en partie le long de la conduite et dont une partie est configurée pour former une boucle conductrice de chauffage s'étendant à proximité de la ou de chaque canule du raccord fluidique. The present invention also relates to a fluidic connection device for the wiper system of the vehicle, characterized in that it comprises a fluidic connection as described below. and at least one fluid line connected to the tubular inlet end of the or cannula of the fluidic connection. Preferably, the device further comprises heating conductors that extend partly along the conduit and a portion of which is configured to form a conductive heating loop extending proximate the or each cannula of the fluidic connection.
Cette boucle de chauffage permet également de chauffer, par exemple par conduction, le ou les moyens de pulvérisation du raccord fluidique. Le raccord fluidique est alors équipé de moyen(s) de pulvérisation de fluide chauffé(s).  This heating loop also makes it possible to heat, for example by conduction, the one or more spraying means of the fluidic connection. The fluidic connection is then equipped with means (s) for spraying heated fluid (s).
La présente invention concerne encore un système d'essuie-glace de véhicule, caractérisé en ce qu'il comprend un raccord fluidique tel que décrit ci-dessus et un balai d'essuie-glace, ce balai comportant un connecteur comportant des moyens de raccordement à l'extrémité tubulaire de sortie de la ou de chaque canule du raccord fluidique. De préférence, le balai comporte en outre des moyens de projection de fluide reliés par au moins un canal auxdits moyens de raccordement. Ce balai peut ne pas comprendre de moyens de chauffage/dégivrage.  The present invention also relates to a vehicle wiper system, characterized in that it comprises a fluidic connection as described above and a windscreen wiper blade, this blade comprising a connector comprising connecting means at the tubular outlet end of the or each cannula of the fluidic connection. Preferably, the wiper further comprises fluid projection means connected by at least one channel to said connecting means. This broom may not include heating / defrosting means.
La présente invention concerne enfin un procédé de pulvérisation de fluide au moyen d'un système d'essuie-glace tel que décrit ci-dessus, caractérisé en ce qu'il comprend  The present invention finally relates to a method of spraying fluid by means of a wiper system as described above, characterized in that it comprises
l'étape consistant à : the step of:
a) en fonctionnement normal, pulvériser du fluide par les moyens de projection du balai d'essuie-glace ainsi que par le ou chaque moyen de pulvérisation du raccord fluidique, pendant toute la durée d'alimentation en fluide du raccord fluidique, a) in normal operation, spraying fluid by the wiper blade spraying means as well as by the or each spraying means of the fluid connection, during the entire fluid supply period of the fluidic connection,
ou les étapes consistant à : or the steps of:
a') en fonctionnement normal, pulvériser du fluide uniquement par les moyens de projection du balai d'essuie-glace, pendant toute la durée d'alimentation en fluide du raccord fluidique, et b') en fonctionnement d'urgence où au moins l'un des éléments parmi lesdits moyens de projection, ledit au moins un canal, et lesdits moyens de raccordement du balai d'essuie-glace, est au moins partiellement bouché par le gel ou par des impuretés, pulvériser du fluide par le ou chaque moyen de pulvérisation du raccord fluidique, pendant toute la durée d'alimentation en fluide du raccord fluidique. a ') in normal operation, spraying fluid only by the wiper blade projecting means, throughout the fluid supply period of the fluidic connection, and b ') in emergency operation where at least one of said projection means, said at least one channel, and said connection means of the wiper blade, is at least partially blocked by the gel or by impurities, spraying fluid through the or each spraying means of the fluidic connection, throughout the fluid supply period of the fluid connection.
L'étape a) du procédé peut correspondre au cas où le ou les moyens de pulvérisation du raccord fluidique ne sont pas équipés de clapets tels que décrits dans ce qui précède. A contrario, les étapes a') et b') peuvent correspondre au cas où le ou les moyens de pulvérisation du raccord fluidique sont équipés de tels clapets. On comprend alors que les moyens de pulvérisation équipés de ces clapets ne sont destinés à être utilisés que dans des cas d'urgence, dans lesquels la pulvérisation de liquide par les moyens de projection du balai n'est pas possible.  Stage a) of the process may correspond to the case where the spraying means or means of the fluidic connection are not equipped with valves as described in the foregoing. Conversely, steps a ') and b') may correspond to the case where the spraying means or means of the fluidic coupling are equipped with such valves. It is then understood that the spraying means equipped with these valves are intended to be used only in emergency cases, in which the spraying of liquid by the broom projection means is not possible.
DESCRIPTION DES FIGURES  DESCRIPTION OF THE FIGURES
L'invention sera mieux comprise et d'autres détails, caractéristiques et avantages de l'invention apparaîtront à la lecture de la description suivante faite à titre d'exemple non limitatif et en référence aux dessins annexés, dans lesquels :  The invention will be better understood and other details, characteristics and advantages of the invention will become apparent on reading the following description given by way of nonlimiting example and with reference to the appended drawings, in which:
- la figure 1 est une vue schématique en perspective d'un système d'essuie-glace de véhicule qui comprend des moyens d'alimentation en liquide lave glace du balai d'essuie-glace, FIG. 1 is a schematic perspective view of a vehicle windscreen wiper system which comprises means for supplying windscreen wiper liquid with ice liquid,
- la figure 2 est une vue en coupe d'une conduite de liquide lave glace du système de la figure 1 ,  FIG. 2 is a sectional view of a washing liquid line of the system of FIG. 1,
- la figure 3 est une vue en perspective d'un dispositif de raccordement fluidique et d'un connecteur d'un balai d'essuie-glace, FIG. 3 is a perspective view of a fluid connection device and a connector of a windscreen wiper blade;
- la figure 4 comprend une vue schématique en perspective du dispositif de raccordement de la figure 3 et une vue de face du connecteur de balai d'essuie-glace de la figure 3, ladite conduite et ledit connecteur étant déconnectés, et - la figure 5 est une vue schématique en perspective d'un dispositif de raccordement fluidique selon l'invention. FIG. 4 comprises a schematic perspective view of the connection device of FIG. 3 and a front view of the wiper blade connector of FIG. 3, said pipe and said connector being disconnected, and - Figure 5 is a schematic perspective view of a fluid connection device according to the invention.
DESCRIPTION DETAILLEE  DETAILED DESCRIPTION
Il faut noter que les figures exposent l'invention de manière détaillée pour mettre en œuvre l'invention, lesdites figures pouvant bien entendu servir à mieux définir l'invention le cas échéant.  It should be noted that the figures disclose the invention in detail to implement the invention, said figures can of course be used to better define the invention where appropriate.
Il est illustré à la figure 1 un système d'essuie glace de pare-brise d'un véhicule, en particulier automobile. Ce système comprend un balai 10 d'essuyage du pare-brise et un bras d'entraînement 12 qui est partiellement représenté et destiné à être entraîné par un moteur pour suivre un mouvement angulaire de va-et-vient permettant d'évacuer l'eau et éventuellement d'autres éléments indésirables recouvrant le pare-brise.  It is illustrated in Figure 1 a windshield wiper system of a vehicle, in particular automobile. This system comprises a windshield wiper blade 10 and a drive arm 12 which is partially shown and intended to be driven by a motor to follow a back-and-forth angular movement to evacuate the water. and possibly other undesirable elements covering the windshield.
De façon connue, le balai 10 comprend un corps longitudinal 14, une lame raclante 16 en général en caoutchouc, et au moins une vertèbre interne (non visible) qui confère un cintrage à la lame 16 de manière à favoriser l'application de cette lame sur le pare-brise. Le corps 14 du balai 10 comporte un déflecteur supérieur destiné à améliorer le fonctionnement du système d'essuyage, le but de ce déflecteur étant d'améliorer le plaquage du balai sur le pare-brise et donc la performance aérodynamique du système.  In known manner, the blade 10 comprises a longitudinal body 14, a scraper blade 16 generally made of rubber, and at least one internal vertebra (not visible) which gives a bend to the blade 16 so as to promote the application of this blade on the windshield. The body 14 of the blade 10 comprises an upper baffle for improving the operation of the wiper system, the purpose of this deflector being to improve the plating of the blade on the windshield and therefore the aerodynamic performance of the system.
Le balai 10 comprend en outre des embouts ou agrafes d'accrochage 20 de la lame 16 et de la vertèbre sur le corps, ces agrafes 20 étant situées à chacune des extrémités longitudinales du corps 14.  The blade 10 further comprises hooks or hooking clips 20 of the blade 16 and the vertebra on the body, these clips 20 being located at each of the longitudinal ends of the body 14.
Le corps 14 du balai est ici réalisé en deux parties indépendantes qui sont disposées sensiblement bout à bout et raccordées l'une à l'autre par un connecteur 22 intermédiaire (représenté en figure 3). Ce connecteur 22 est donc intercalé entre les deux parties du corps 14 et comprend des moyens 24 de fixation à ces parties, par exemple par emboîtement.  The body 14 of the brush is here made in two independent parts which are arranged substantially end to end and connected to one another by an intermediate connector 22 (shown in Figure 3). This connector 22 is interposed between the two parts of the body 14 and comprises means 24 for attachment to these parts, for example by interlocking.
Pour assurer son montage sur le bras 12, le système d'essuie glace comprend un adaptateur (non visible) monté sur le connecteur 22 et permettant une articulation du balai 10 par rapport au bras 12. L'articulation du balai 10 par rapport au bras 12 est une articulation selon un mouvement de rotation autour d'un axe de rotation Y perpendiculaire à l'axe longitudinal du balai 10. Le balai 10 doit en effet présenter au moins un degré de liberté en rotation par rapport au bras 12, et plus spécifiquement par rapport à une pièce terminale 26 du bras 12, pour permettre au balai 10 de suivre la courbure du pare-brise. A cet effet, l'adaptateur et le connecteur 22 sont articulés en rotation l'un à l'autre autour d'un axe perpendiculaire au balai. To ensure its mounting on the arm 12, the wiper system comprises an adapter (not visible) mounted on the connector 22 and allowing an articulation of the blade 10 relative to the arm 12. The articulation of the blade 10 relative to the arm 12 is a hinge in a rotational movement about an axis of rotation Y perpendicular to the longitudinal axis of the blade 10. The blade 10 must in fact have at least one degree of freedom in rotation by compared to the arm 12, and more specifically with respect to an end piece 26 of the arm 12, to allow the blade 10 to follow the curvature of the windshield. For this purpose, the adapter and the connector 22 are articulated in rotation to one another about an axis perpendicular to the blade.
Le balai 10 comprend des moyens (non représentés) de projection de liquide lave glace sur le pare-brise, telles que des rampes d'arrosage, qui sont alimentés en liquide lave glace par un dispositif de raccordement fluidique comportant un raccord fluidique 30 et une conduite 32, seule la conduite étant visible en figure 1 .  The blade 10 comprises means (not shown) for spraying windscreen washer fluid, such as spray bars, which are supplied with washing liquid by a fluidic connection device comprising a fluid connection 30 and a fluidic connection device 30. pipe 32, only the pipe being visible in FIG.
Le balai d'essuie-glace 10 est ici équipé de deux rampes d'arrosage qui sont situées de chaque côté du balai. Chaque rampe est pourvue d'un gicleur ou d'une multitude de gicleurs ou orifices d'arrosage sous pression, permettant la distribution du liquide lave-glace sur le pare-brise. Ces rampes d'arrosage peuvent être avantageusement aménagées dans le déflecteur.  The wiper blade 10 is here equipped with two spray bars which are located on each side of the blade. Each ramp is provided with a nozzle or a multitude of nozzles or pressurized watering orifices, allowing the distribution of the washer fluid on the windshield. These irrigation ramps can be advantageously arranged in the baffle.
Le liquide lave-glace est envoyé uniquement sur la partie avant du balai, c'est-à-dire que le liquide lave-glace est envoyé sur la rampe d'arrosage située du côté duquel le bras du balai d'essuie-glace avance pendant une phase montante du balayage et de l'autre côté pendant la phase descendante du balayage. Cet agencement permet d'essuyer instantanément le liquide lave-glace après son dépôt sur la surface vitrée, supprimant ainsi tout intervalle durant lequel la vision aurait pu être réduite.  The windshield wiper fluid is sent only to the front part of the wiper, ie the windshield wiper fluid is sent to the spray boom located on the side of which the arm of the wiper blade is moving. during a rising phase of the scan and on the other side during the downward phase of the scan. This arrangement makes it possible to wipe the washer fluid instantly after it has been deposited on the glass surface, thus eliminating any interval during which the vision could have been reduced.
Mieux visible sur la vue en coupe de la figure 2, la conduite 32 comporte un manchon 34 extrudé de deux canaux de circulation 36a, 36b et comporte deux conducteurs chauffants 37a, 37b noyés dans la masse du manchon 34. Le manchon 34 est en matériau souple, par exemple en caoutchouc. Les canaux de circulation 36a, 36b du liquide lave-glace et les conducteurs chauffants 37a, 37b sont obtenus, par exemple, par co- extrusion : les conducteurs chauffants 37a, 37b sont introduits avec la matière de manchon extrudée. La section du manchon 34 présente par exemple une forme générale en huit et les conducteurs chauffants 37a, 37b sont alignés au centre entre les canaux de circulation 36a, 36b. Les conducteurs chauffants 37a, 37b et les canaux de circulation 36a, 36b sont longitudinalement sensiblement parallèles entre eux. Better visible in the sectional view of Figure 2, the pipe 32 comprises a sleeve 34 extruded from two circulation channels 36a, 36b and comprises two heating conductors 37a, 37b embedded in the mass of the sleeve 34. The sleeve 34 is of material flexible, for example rubber. The circulation channels 36a, 36b of the washer fluid and the heating conductors 37a, 37b are obtained, for example, by means of extrusion: Heating conductors 37a, 37b are introduced with the extruded sleeve material. The section of the sleeve 34 has for example a general shape in eight and the heating conductors 37a, 37b are aligned centrally between the circulation channels 36a, 36b. The heating conductors 37a, 37b and the circulation channels 36a, 36b are longitudinally substantially parallel to each other.
Les conducteurs chauffants 37a, 37b sont gainés et comportent par exemple un fil résistif chauffant ou des fils reliés à des éléments chauffants, de sorte que le liquide lave-glace prélevé dans le réservoir par la ou les pompe(s) vers la rampe d'arrosage respective soit réchauffé lorsque les conducteurs chauffants 37a, 37b sont alimentés. En cours d'utilisation dans un premier sens du balai d'essuie-glace, le liquide lave-glace est réchauffé dans le premier canal de circulation 36a de la conduite 32 et alimente la première rampe d'arrosage du balai d'essuie-glace 10. Dans le sens opposé, le deuxième canal de circulation 36b alimente la deuxième rampe d'arrosage du balai d'essuie-glace 10. Le liquide lave-glace réchauffé participe au dégivrage du pare-brise.  The heating conductors 37a, 37b are sheathed and comprise, for example, a heating resistive wire or wires connected to heating elements, so that the washer fluid taken from the reservoir by the pump (s) towards the ramp respective watering is reheated when the heating conductors 37a, 37b are fed. In use in a first direction of the windscreen wiper blade, the washer fluid is heated in the first circulation channel 36a of the pipe 32 and feeds the first spray bar of the wiper blade 10. In the opposite direction, the second circulation channel 36b feeds the second spray bar of the wiper blade 10. The heated windshield wiper fluid participates in defrosting the windshield.
Comme on peut le voir sur les figures 3 et 4, la conduite 32 est raccordée au connecteur 22 du balai par l'intermédiaire du raccord fluidique 30 qui est ici un raccord mâle. On constate également que ce raccord 30 porte un connecteur électrique 39 mâle destiné à être relié électriquement au connecteur 22 du balai.  As can be seen in Figures 3 and 4, the pipe 32 is connected to the connector 22 of the brush through the fluid connector 30 which is here a male connector. It is also noted that this connector 30 carries a male electrical connector 39 to be electrically connected to the connector 22 of the brush.
Le connecteur électrique 39 comporte deux fiches électriques 40 pour l'alimentation électrique des éléments de chauffage du balai 10. On peut aussi envisager que le raccord 30 ne porte par un tel connecteur 39, c'est-à-dire que la conduite 32 est chauffée mais pas le balai d'essuie-glace 10.  The electrical connector 39 has two electrical plugs 40 for the electrical supply of the heating elements of the blade 10. It can also be envisaged that the connector 30 does not carry such a connector 39, that is to say that the pipe 32 is heated but not the wiper blade 10.
Le raccord fluidique 30 comporte deux canules 41 a, 41 b. Chaque canule 41 a, 41 b présente une forme tubulaire ayant une entrée 42a, 42b et une sortie 43a, 43b entre lesquelles le liquide lave-glace peut circuler. Les canules 41 a, 41 b présentent une portion coudée entre une extrémité tubulaire droite d'entrée et une extrémité tubulaire droite de sortie. Les canules 41 a, 41 b sont des canaux de circulation indépendants, maintenues entre elles par des traverses de renfort. Les extrémités tubulaires d'entrée des canules 42a, 42b sont insérées dans les canaux de circulation 36a, 36b du manchon 34 de manière à assurer le raccordement fluidique entre les canaux de circulation 36a, 36b et les canules 41 a, 41 b. The fluidic connection 30 comprises two cannulas 41a, 41b. Each cannula 41a, 41b has a tubular shape having an inlet 42a, 42b and an outlet 43a, 43b between which the washer fluid can circulate. The cannulas 41a, 41b have a portion bent between one end straight tubular inlet and a straight tubular end outlet. The cannulas 41a, 41b are independent circulation channels, held together by reinforcing crosspieces. The tubular inlet ends of the cannulas 42a, 42b are inserted into the circulation channels 36a, 36b of the sleeve 34 so as to ensure the fluid connection between the circulation channels 36a, 36b and the cannulas 41a, 41b.
Le connecteur 22 du balai 10 comprend une partie de raccord femelle qui est destinée à coopérer avec le raccord 30 pour assurer le raccordement fluidique du liquide lave-glace. Le connecteur 22 présente ainsi deux orifices d'entrée 44a, 44b dans lesquels les extrémités tubulaires de sortie 43a, 43b des canules 41 a, 41 b peuvent être insérées.  The connector 22 of the brush 10 comprises a female connector portion which is intended to cooperate with the connector 30 to ensure the fluid connection of the washer fluid. The connector 22 thus has two inlet ports 44a, 44b in which the tubular outlet ends 43a, 43b of the cannulas 41a, 41b can be inserted.
Egalement, dans le cas où le balai 10 est chauffé, le connecteur 22 du balai comporte un socle électrique présentant deux orifices électriques 45a, 45b pouvant coopérer avec les fiches électriques 40 du connecteur électrique 39 pour assurer le raccordement électrique permettant l'alimentation électrique d'éléments chauffants du balai d'essuie-glace.  Also, in the case where the blade 10 is heated, the connector 22 of the blade comprises an electrical base having two electrical ports 45a, 45b can cooperate with the electrical plugs 40 of the electrical connector 39 to provide the electrical connection for the power supply of the power supply. heating elements of the windscreen wiper blade.
Le maintien du raccordement électrique et fluidique est réalisé par des moyens de maintien mécanique amovible du raccord 30 et du connecteur 39, qui coopèrent avec des moyens complémentaires du connecteur 22 du balai.  Maintaining the electrical and fluidic connection is achieved by removable mechanical holding means of the connector 30 and the connector 39, which cooperate with complementary means of the connector 22 of the brush.
Les conducteurs chauffants 37a, 37b sont électriquement raccordés entre eux pour former une boucle conductrice de chauffage s'étendant hors du manchon 34, la boucle conductrice est disposée au moins partiellement à proximité des canules 41 a, 41 b du raccord 30 tout en restant de préférence à distance des sorties 43a, 43b des canules. Les conducteurs chauffants 37a, 37b sont destinés à être connectés à une alimentation électrique de l'autre côté du manchon 34. On profite ainsi de la présence des conducteurs chauffants 37a, 37b noyés dans le manchon 34 pour réchauffer également le raccord 30 sans nécessiter de connecteurs électriques intermédiaires, ni de câbles électriques supplémentaires, c'est à dire sans surcoût en utilisant les moyens déjà existants. On assure ainsi une continuité du chauffage du liquide lave glace dans la conduite de réchauffage et de transport jusqu'aux sorties du raccord mâle à liquide. The heating conductors 37a, 37b are electrically connected together to form a heating conductive loop extending out of the sleeve 34, the conductive loop is disposed at least partially in the vicinity of the cannulas 41a, 41b of the connector 30 while remaining preferably remote from the outlets 43a, 43b of the cannulas. The heating conductors 37a, 37b are intended to be connected to a power supply on the other side of the sleeve 34. This takes advantage of the presence of the heating conductors 37a, 37b embedded in the sleeve 34 to also heat the connection 30 without requiring intermediate electrical connectors, or additional electric cables, ie without additional cost using existing means. This ensures a continuity of the heating of the washing liquid in the heating and transport pipe to the outlets of the liquid coupling.
La figure 5 représente un mode de réalisation du raccord fluidique 30' selon l'invention, les éléments déjà décrits dans ce qui précède étant référencés par les mêmes chiffres dans cette figure pour faciliter la compréhension de l'invention.  FIG. 5 represents an embodiment of the fluidic connection 30 'according to the invention, the elements already described in the foregoing being referenced by the same numbers in this figure to facilitate understanding of the invention.
Selon l'invention, le raccord 30' comprend au moins un moyen de pulvérisation de liquide lave glace. Dans l'exemple représenté, le raccord 30', qui comprend deux canules 41 a, 41 b d'alimentation de deux rampes d'arrosage d'un balai d'essuie-glace 10, respectivement, est équipé de deux moyens de pulvérisation 50 indépendants, chacun de ces moyens 50 étant en communication fluidique avec l'une des canules 41 a, 41 b pour son alimentation en liquide lave glace.  According to the invention, the connector 30 'comprises at least one means for spraying washing liquid. In the example shown, the connector 30 ', which comprises two cannulas 41a, 41b supplying two spray bars of a wiper blade 10, respectively, is equipped with two spray means 50 independent, each of these means 50 being in fluid communication with one of the cannulas 41a, 41b for its washing liquid supply.
Le moyen de pulvérisation 50 de chaque canule 41 a, 41 b comprend ici un gicleur qui est en saillie sur la canule, et plus précisément le moyen de pulvérisation 50 est situé à proximité de la partie coudée des canules 41 a, 41 b. Comme représenté, le moyen de pulvérisation 50 peut être situé sur l'extrémité tubulaire droite d'entrée 42a, 42b de la canule.  The spraying means 50 of each cannula 41a, 41b here comprises a nozzle projecting from the cannula, and more specifically the spraying means 50 is located near the bent portion of the cannulas 41a, 41b. As shown, the spraying means 50 may be located on the right inlet tubular end 42a, 42b of the cannula.
Les gicleurs des canules 41 a, 41 b peuvent s'étendre dans des directions sensiblement opposées. Ils peuvent être situés sensiblement dans un même plan passant par les axes longitudinaux des extrémités tubulaires droites d'entrée 42a, 42b des canules.  The jets of the cannulas 41a, 41b may extend in substantially opposite directions. They may be located substantially in the same plane passing through the longitudinal axes of the straight tubular ends 42a, 42b of the cannulas.
Chaque gicleur comprend un orifice 51 de pulvérisation de liquide lave glace qui est relié par un canal interne 52 au passage interne 53 de la canule, ce canal 52 formant une dérivation de ce passage 53 pour l'alimentation en liquide lave glace du gicleur.  Each nozzle comprises a washing fluid spray orifice 51 which is connected by an internal channel 52 to the internal passage 53 of the cannula, this channel 52 forming a bypass of this passage 53 for the supply of washing liquid from the nozzle.
Dans le cas où les orifices 51 des gicleurs sont en permanence ouverts, l'alimentation en liquide lave glace du balai 10 par la conduite 32 et le raccord 30' (pour la projection de liquide lave glace sur le pare-brise par les rampes d'arrosage du balai) entraîne la pulvérisation de liquide lave glace sur le pare-brise par l'intermédiaire des gicleurs. Il est toutefois possible d'équiper les gicleurs de clapets destinés à obturer les orifices 51 des gicleurs lorsque la pulvérisation de liquide par les gicleurs n'est pas souhaitée. C'est par exemple le cas lorsque les rampes du balai 10 fonctionnent correctement. Il n'est alors pas nécessaire de pulvériser davantage de liquide par l'intermédiaire des gicleurs du raccord 30'. In the case where the orifices 51 of the nozzles are permanently open, the windshield washer fluid supply of the brush 10 through the pipe 32 and the coupling 30 '(for the projection of windshield washer liquid on the windshield by the ramps watering the broom) causes the windscreen fluid to spray on the windshield via the nozzles. It is possible, however, to equip the sprinklers with valves intended to close the orifices 51 of the nozzles when the spraying of liquid by the nozzles is not desired. This is for example the case when the ramps of the broom 10 work properly. It is then not necessary to spray more liquid through the jets of the fitting 30 '.
Selon un mode de réalisation de l'invention, chaque gicleur est équipé d'un clapet mobile qui est apte à se déplacer d'une position d'obturation de l'orifice 51 à une position de libération de celui-ci, ce déplacement étant de préférence provoqué par la pression du liquide lave glace à l'intérieur du raccord 30'. Le clapet est par exemple configuré pour se déplacer de la position d'obturation à la position de libération lorsque la pression du liquide dans la canule 41 a, 41 b est supérieure à une valeur prédéterminée, comme décrit dans ce qui précède.  According to one embodiment of the invention, each nozzle is equipped with a movable valve which is able to move from a closed position of the orifice 51 to a release position thereof, this displacement being preferably caused by the pressure of the washer fluid inside the fitting 30 '. The valve is for example configured to move from the closed position to the release position when the pressure of the liquid in the cannula 41a, 41b is greater than a predetermined value, as described in the foregoing.
Le clapet de chaque gicleur comprend par exemple une bille sollicitée par un ressort de compression contre un siège s'étendant autour de l'orifice 51 du gicleur, la force exercée par le ressort sur la bille s'opposant à celle exercée par le liquide sur la bille. La raideur du ressort est ainsi de préférence déterminée pour qu'il se comprime et que la bille s'éloigne de son siège lorsque la pression du liquide dans la canule correspondante devient anormale, par exemple lorsque les orifices de sortie de liquide de la rampe alimentée par cette canule sont obturés par le gel ou par des impuretés et que la pression de liquide dans le raccord 30' augmente du fait que la pompe continue d'alimenter le raccord en liquide.  The valve of each nozzle comprises for example a ball urged by a compression spring against a seat extending around the orifice 51 of the nozzle, the force exerted by the spring on the ball opposing that exerted by the liquid on the marble. The stiffness of the spring is thus preferably determined so that it compresses and the ball moves away from its seat when the pressure of the liquid in the corresponding cannula becomes abnormal, for example when the liquid outlet openings of the fed ramp. by this cannula are closed off by the gel or by impurities and that the liquid pressure in the connection 30 'increases because the pump continues to supply the connection liquid.
Dans un exemple particulier de réalisation de l'invention, la valeur précitée de pression à partir de laquelle le clapet est destiné à être actionné est de l'ordre de 3 bars, cette valeur peut notamment varier en fonction de la pression délivrée par la pompe.  In a particular embodiment of the invention, the aforesaid value of pressure from which the valve is intended to be actuated is of the order of 3 bar, this value may in particular vary as a function of the pressure delivered by the pump. .
La présente invention propose aussi un procédé de pulvérisation de liquide lave glace au moyen d'un système d'essuie-glace tel que décrit ci- dessus. Comme décrit dans ce qui précède, ce procédé peut comprendre une étape consistant, en fonctionnement normal, à pulvériser du liquide par les rampes d'arrosage du balai d'essuie-glace ainsi que par les gicleurs (dépourvus de clapets) du raccord fluidique, pendant toute la durée d'alimentation en fluide du raccord fluidique. En variante, le procédé comprend les étapes consistant, en fonctionnement normal, à pulvériser du liquide par les rampes du balai, pendant toute la durée d'alimentation en fluide du raccord fluidique, et, en fonctionnement d'urgence où le gel ou des impuretés gênent ou empêchent la projection de liquide par le balai, à pulvériser du liquide uniquement par les gicleurs (équipés de clapets) du raccord fluidique, pendant toute la durée d'alimentation en fluide du raccord fluidique. The present invention also provides a method of spraying washing liquid by means of a wiper system as described above. As described above, this method can comprise a step consisting, in normal operation, in spraying liquid through the spray bars of the wiper blade as well as through the nozzles (without valves) of the fluid connection, during the entire fluid supply period of the connection fluidics. Alternatively, the method comprises the steps of, in normal operation, spraying liquid by the ramps of the wiper, during the entire fluid supply period of the fluidic connection, and, in emergency operation where the gel or impurities impede or prevent the liquid from being sprayed by the broom, by spraying liquid only through the nozzles (equipped with valves) of the fluidic connection, throughout the fluid supply period of the fluidic connection.
Bien que l'invention ait été décrite dans ce qui précède en relation avec un raccord fluidique à deux canules pour l'alimentation en liquide lave glace d'un balai bi-rampe, il est bien entendu envisageable d'appliquer cette invention à un raccord fluidique comportant une seule canule pour l'alimentation en liquide lave glace d'un balai mono-rampe.  Although the invention has been described in the foregoing in connection with a fluidic connection to two cannulas for the supply of washing liquid bi-ramp brush, it is of course conceivable to apply this invention to a fitting fluidic device comprising a single cannula for supplying washing-up liquid from a single-ramp brush.
De même, le raccord fluidique selon l'invention peut appartenir à un système d'essuie glace dont les balais sont dépourvus de rampe de projection de liquide lave-glace. Dans un tel cas, le raccord 30' raccordé à la conduite de fluide 32 constitue le seul moyen de pulvérisation de liquide lave-glace sur le pare-brise.  Similarly, the fluidic connection according to the invention may belong to a windscreen wiper system, the brushes of which do not have a washer fluid projection ramp. In such a case, the connection 30 'connected to the fluid line 32 is the only means of spraying windshield washer fluid.
En variante, le raccord fluidique selon l'invention peut appartenir à un système d'essuie glace dépourvu de système de chauffage du balai (comme décrit précédemment) et/ou de système de chauffage de la conduite de fluide 32.  Alternatively, the fluidic connection according to the invention can belong to a wiper system without a brush heating system (as previously described) and / or a heating system of the fluid line 32.

Claims

REVENDICATIONS
1 . Raccord fluidique (30') pour système d'essuie-glace de véhicule, comportant au moins une canule (41 a, 41 b) présentant au moins une extrémité tubulaire d'entrée (42a, 42b) configurée pour être raccordée à une conduite (32) de fluide et une extrémité tubulaire de sortie (43a, 43b) configurée pour être raccordée à un connecteur (22) d'un balai d'essuie- glace (10), caractérisé en ce qu'il comprend au moins un moyen (50) de pulvérisation de fluide qui est en communication fluidique avec ladite canule. 1. A fluidic connection (30 ') for a vehicle wiper system, comprising at least one cannula (41a, 41b) having at least one tubular inlet end (42a, 42b) configured to be connected to a line ( 32) and a tubular outlet end (43a, 43b) configured to be connected to a connector (22) of a wiper blade (10), characterized in that it comprises at least one means ( 50) fluid which is in fluid communication with said cannula.
2. Raccord fluidique selon la revendication 1 , caractérisé en ce qu'il comprend deux moyens (50) de pulvérisation de fluide indépendants. 2. Fluidic connection according to claim 1, characterized in that it comprises two independent fluid spraying means (50).
3. Raccord fluidique selon la revendication 2, caractérisé en ce qu'il comprend deux canules (41 a, 41 b) qui sont chacune en communication fluidique avec l'un des deux moyens de pulvérisation (50). 3. Fluidic connection according to claim 2, characterized in that it comprises two cannulas (41a, 41b) which are each in fluid communication with one of the two spraying means (50).
4. Raccord fluidique selon l'une des revendications précédentes, caractérisé en ce que le ou chaque moyen de pulvérisation (50) comprend un gicleur en saillie sur la canule (41 a, 41 b).  4. Fluidic connection according to one of the preceding claims, characterized in that the or each spray means (50) comprises a nozzle projecting on the cannula (41a, 41b).
5. Raccord fluidique selon la revendication 4, caractérisé en ce qu'il comprend deux canules (41 a, 41 b) et deux gicleurs, les gicleurs s'étendant dans des directions sensiblement opposées.  5. Fluidic connection according to claim 4, characterized in that it comprises two cannulas (41a, 41b) and two nozzles, the nozzles extending in substantially opposite directions.
6. Raccord fluidique selon la revendication 4 ou 5, caractérisé en ce qu'il comprend deux canules (41 a, 41 b) et deux gicleurs, les gicleurs étant situés sur des côtés opposés des canules et étant coupés par un plan passant par les axes longitudinaux des extrémités tubulaires d'entrée (42a, 42b) des canules.  6. Fluidic connection according to claim 4 or 5, characterized in that it comprises two cannulas (41a, 41b) and two nozzles, the nozzles being located on opposite sides of the cannulas and being cut by a plane passing through them. longitudinal axes of the tubular inlet ends (42a, 42b) of the cannulas.
7. Raccord fluidique selon l'une des revendications précédentes, caractérisé en ce que le ou chaque moyen de pulvérisation (50) comprend un orifice (51 ). 7. Fluidic connection according to one of the preceding claims, characterized in that the or each spray means (50) comprises an orifice (51).
8. Raccord fluidique selon l'une des revendications précédentes, caractérisé en ce que le ou chaque moyen de pulvérisation (50) est équipé d'un clapet configuré pour se déplacer d'une position d'obturation du moyen de pulvérisation à une position de libération de ce moyen. 8. Fluidic connection according to one of the preceding claims, characterized in that the or each spray means (50) is equipped with a valve configured to move from a closed position of the spray means to a position of release of this means.
9. Raccord fluidique selon la revendication 8, caractérisé en ce que le clapet est configuré pour être actionné par la pression du fluide dans la canule. 9. Fluidic connection according to claim 8, characterized in that the valve is configured to be actuated by the pressure of the fluid in the cannula.
10. Raccord fluidique selon la revendication 8 ou 9, caractérisé en ce que le clapet est configuré pour se déplacer de la position d'obturation à la position de libération lorsque la pression du fluide dans la canule (41 a, 41 b) est supérieure à une valeur prédéterminée.  10. Fluidic connection according to claim 8 or 9, characterized in that the valve is configured to move from the closed position to the release position when the pressure of the fluid in the cannula (41a, 41b) is greater than at a predetermined value.
1 1 . Raccord fluidique selon l'une des revendications précédentes, caractérisé en ce que l'extrémité tubulaire de sortie (42a, 42b) de la ou de chaque canule (41 a, 41 b) comprend des moyens d'emboîtement du type mâle.  1 1. Fluidic connection according to one of the preceding claims, characterized in that the tubular outlet end (42a, 42b) of the or each cannula (41a, 41b) comprises interlocking means of the male type.
12. Raccord fluidique selon l'une des revendications précédentes, caractérisé en ce qu'il comprend des moyens de fixation configurés pour coopérer avec des moyens correspondants d'un bras d'entraînement d'un balai d'essuie-glace.  12. Fluidic connection according to one of the preceding claims, characterized in that it comprises fastening means configured to cooperate with corresponding means of a drive arm of a wiper blade.
13. Dispositif de raccordement fluidique pour système d'essuie-glace de véhicule, caractérisé en ce qu'il comprend un raccord fluidique (30') selon l'une des revendications précédentes et au moins une conduite (32) de fluide raccordée à l'extrémité tubulaire d'entrée (42a, 42b) de la ou d'une canule du raccord fluidique. 13. Fluidic connection device for a vehicle wiper system, characterized in that it comprises a fluidic connection (30 ') according to one of the preceding claims and at least one line (32) of fluid connected to the wiper system. tubular inlet end (42a, 42b) of the or cannula of the fluidic connection.
14. Dispositif de raccordement selon la revendication 13, caractérisé en ce que le dispositif comporte en outre des conducteurs électriques chauffants (37a, 37b) qui s'étendent en partie le long de la conduite et dont une partie est configurée pour former une boucle conductrice de chauffage s'étendant à proximité de la ou de chaque canule (37a, 37b) du raccord fluidique. Connecting device according to claim 13, characterized in that the device further comprises heating electrical conductors (37a, 37b) which extend partly along the pipe and a portion of which is configured to form a conductive loop. heater extending near the or each cannula (37a, 37b) of the fluidic connection.
15. Système d'essuie-glace de véhicule, caractérisé en ce qu'il comprend un raccord fluidique (30') selon l'une des revendications 1 à 12 et un balai d'essuie-glace (10), ce balai comportant un connecteur (22) comportant des moyens (44a, 44b) de raccordement à l'extrémité tubulaire de sortie (43a, 43b) de la ou de chaque canule (41 a, 41 b) du raccord fluidique. 15. Vehicle wiper system, characterized in that it comprises a fluidic connection (30 ') according to one of claims 1 to 12 and a windscreen wiper blade (10), this wiper comprising a connector (22) having means (44a, 44b) for connecting to the tubular outlet end (43a, 43b) of the or each cannula (41a, 41b) of the fluidic connection.
16. Système d'essuie-glace selon la revendication 15, caractérisé en ce que le balai comporte en outre des moyens de projection de fluide reliés par au moins un canal auxdits moyens de raccordement.  16. Wiper system according to claim 15, characterized in that the wiper further comprises fluid projection means connected by at least one channel to said connecting means.
17. Procédé de pulvérisation de fluide au moyen d'un système d'essuie- glace selon les revendications 15 et 16, caractérisé en ce qu'il comprend l'étape consistant à : 17. A method of spraying fluid by means of a windscreen wiper system according to claims 15 and 16, characterized in that it comprises the step of:
a) en fonctionnement normal, pulvériser du fluide par les moyens de projection du balai d'essuie-glace (10) ainsi que par le ou chaque moyen de pulvérisation (50) du raccord fluidique (30'), pendant toute la durée d'alimentation en fluide du raccord fluidique, a) in normal operation, spray fluid through the wiper blade projection means (10) and the or each spray means (50) of the fluid connector (30 ') for the duration of fluid supply of the fluidic connection,
ou les étapes consistant à : or the steps of:
a') en fonctionnement normal, pulvériser du fluide uniquement par les moyens de projection du balai d'essuie-glace, pendant toute la durée d'alimentation en fluide du raccord fluidique, et a ') in normal operation, spraying fluid only by the wiper blade projecting means, throughout the fluid supply period of the fluidic connection, and
b') en fonctionnement d'urgence où au moins l'un des éléments parmi lesdits moyens de projection, ledit au moins un canal, et lesdits moyens de raccordement du balai d'essuie-glace, est au moins partiellement bouché par le gel ou par des impuretés, pulvériser du fluide par le ou chaque moyen de pulvérisation du raccord fluidique, pendant toute la durée d'alimentation en fluide du raccord fluidique. b ') in emergency operation where at least one of said projection means, said at least one channel, and said connection means of the wiper blade, is at least partially blocked by the gel or by impurities, spraying fluid through the or each spraying means of the fluidic connection, throughout the fluid supply period of the fluid connection.
PCT/EP2014/075897 2013-12-05 2014-11-28 Fluidic coupling for a vehicle windshield wiper system WO2015082326A1 (en)

Applications Claiming Priority (2)

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FR1362133 2013-12-05
FR1362133A FR3014391B1 (en) 2013-12-05 2013-12-05 FLUID CONNECTION FOR VEHICLE ICE WIPER SYSTEM

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1985513A1 (en) * 2007-04-26 2008-10-29 Federal-Mogul Ignition Srl Windscreen wiper arm
EP2460700A1 (en) * 2010-12-02 2012-06-06 Valeo Systemes D'essuyage Hydraulic connector for a windscreen wiper blade
FR2971470A1 (en) * 2011-02-16 2012-08-17 Valeo Systemes Dessuyage HEATING AND TRANSPORTING CONDUCT OF ICE-LIQUID WASHING MACHINE FOR AUTOMOTIVE MOTOR VEHICLE WIPER BLADE
FR2984256A1 (en) * 2011-12-19 2013-06-21 Valeo Systemes Dessuyage PLASTIC AND THERMOCONDUCTIVE COMPONENT OF A SYSTEM FOR THE SUPPLY AND / OR DISTRIBUTION OF ICE WASTE LIQUID OF A MOTOR VEHICLE

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1985513A1 (en) * 2007-04-26 2008-10-29 Federal-Mogul Ignition Srl Windscreen wiper arm
EP2460700A1 (en) * 2010-12-02 2012-06-06 Valeo Systemes D'essuyage Hydraulic connector for a windscreen wiper blade
FR2971470A1 (en) * 2011-02-16 2012-08-17 Valeo Systemes Dessuyage HEATING AND TRANSPORTING CONDUCT OF ICE-LIQUID WASHING MACHINE FOR AUTOMOTIVE MOTOR VEHICLE WIPER BLADE
FR2984256A1 (en) * 2011-12-19 2013-06-21 Valeo Systemes Dessuyage PLASTIC AND THERMOCONDUCTIVE COMPONENT OF A SYSTEM FOR THE SUPPLY AND / OR DISTRIBUTION OF ICE WASTE LIQUID OF A MOTOR VEHICLE

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FR3014391A1 (en) 2015-06-12
FR3014391B1 (en) 2016-01-22

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