EP3980300A1 - Dispositif de nettoyage d'une surface vitrée d'un capteur optique pour un véhicule automobile - Google Patents
Dispositif de nettoyage d'une surface vitrée d'un capteur optique pour un véhicule automobileInfo
- Publication number
- EP3980300A1 EP3980300A1 EP20721663.1A EP20721663A EP3980300A1 EP 3980300 A1 EP3980300 A1 EP 3980300A1 EP 20721663 A EP20721663 A EP 20721663A EP 3980300 A1 EP3980300 A1 EP 3980300A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cleaning
- movable piston
- wiper blade
- cleaning device
- cleaning fluid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
- B60S1/56—Cleaning windscreens, windows or optical devices specially adapted for cleaning other parts or devices than front windows or windscreens
- B60S1/566—Cleaning windscreens, windows or optical devices specially adapted for cleaning other parts or devices than front windows or windscreens including wiping devices
-
- 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
- B60S1/46—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
- B60S1/528—Arrangement of nozzles; Liquid spreading means moving liquid spreading means, e.g. arranged in wiper arms the spreading means being moved between a rest position and a working position
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/0006—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means to keep optical surfaces clean, e.g. by preventing or removing dirt, stains, contamination, condensation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/497—Means for monitoring or calibrating
- G01S2007/4975—Means for monitoring or calibrating of sensor obstruction by, e.g. dirt- or ice-coating, e.g. by reflection measurement on front-screen
- G01S2007/4977—Means for monitoring or calibrating of sensor obstruction by, e.g. dirt- or ice-coating, e.g. by reflection measurement on front-screen including means to prevent or remove the obstruction
Definitions
- the present invention relates to the field of cleaning sensors / transmitters of a motor vehicle, and more particularly the cleaning of glass surfaces of optical sensors of optical detection systems of such vehicles.
- driver assistance systems are most often triggered by the detection of a signal, whether that signal is optical, electrical or any other type.
- the sensor arranged to record the signal must be perfectly clean, so as not to risk a non-triggering or an unexpected triggering of the system.
- Cleaning devices are therefore known in which, in addition to a cleaning fluid, sprayed first onto the optical surface to clean this optical surface and remove dirt, provision is made to spray a drying fluid onto the optical surface, and for example air.
- a drying fluid onto the optical surface, and for example air.
- a telescopic device for cleaning a glazed surface of a motor vehicle comprising at least one hollow body and a movable piston configured to sliding in the hollow body along a direction of deployment between a deployed position and a folded position, said movable piston being configured to support a member for cleaning the glazed surface.
- the cleaning device comprises two cleaning members consisting of a member for projecting a cleaning fluid conveyed through the hollow body and a wiper blade, said two cleaning members being integral with the movable piston.
- the cleaning device is interesting in that it combines two complementary cleaning means, one of which requires a fluidic supply, on a telescopic support for conveying the cleaning fluid.
- a telescopic nozzle makes it possible to release the projection member from the field of view of the camera when no cleaning is necessary and the arrangement of the brush on the movable piston ensures that the deployment of the nozzle , or projection member, does indeed drive the broom.
- the movable piston being mechanically connected to the wiper blade, it is understood that a movement of the movable piston along the direction of deployment also causes, along this same direction of deployment, a movement of the wiper blade.
- the fact of making integral the two cleaning means of the same movable support formed by the piston makes it possible to keep a constant distance between the nozzle and the brush throughout the cleaning operation, and of a cleaning operation. to the other.
- an expanding movement of the piston corresponds to a movement during which the movable piston passes from its folded position to its deployed position while a folding movement of the movable piston corresponds to a movement during which the movable piston moves from its deployed position to its folded position.
- the projection member can be configured to allow a projection of cleaning fluid on the glass surface to be cleaned during the deployment movements of the movable piston.
- provision may also be made for an additional projection of cleaning fluid, which is carried out during the folding movements of the wiper blade.
- the wiper blade extends mainly along a transverse axis perpendicular to the direction of deployment of the movable piston, the main transverse axis of extension of the wiper and the direction of deployment of the piston. mobile fitting in a plane parallel to a main extension plane of the glazed surface to be cleaned.
- At least one projection member is configured to project cleaning fluid upstream of the wiper blade in a direction of deployment of this wiper blade.
- the projection of cleaning fluid by the projection member is always followed by wiping of the cleaning fluid thus projected by the wiper blade. It is understood that the projection of cleaning fluid upstream of the wiper blade thus allows rapid and effective wiping of the cleaning fluid thus projected.
- an intermediate part is arranged at the free end of the movable piston, said intermediate part being configured to form a support for the wiper blade and to form a support for at least part of the projection member.
- At least one outlet for the cleaning fluid is provided in the movable piston and the intermediate part has a through hole arranged opposite the outlet to allow the passage of cleaning fluid to the projection organ.
- the outlet for the cleaning fluid is provided at a free end of the movable piston, that is to say at an end which extends outside the hollow body for conveying the cleaning fluid in which the piston slides. mobile.
- the wiper blade may comprise at least one structural element carrying a wiping blade, at least part of which is intended to come into contact with the glazed surface to be cleaned in order to wipe the cleaning fluid sprayed onto this surface.
- the wiping blade may comprise at least one heel carried by the structural element and at least one lip connected to the heel by a hinge, this lip forming the part of the wiping blade intended to come into contact with the glazed surface.
- the projection member is formed by at least one projection nozzle mechanically connected to the mobile piston.
- the intermediate piece which makes it possible to mechanically connect the mobile piston to the wiper blade can be adapted to mechanically connect the projection nozzle to this mobile piston.
- the intermediate piece is fixed to the movable piston and carries both the wiper blade and the spray nozzle.
- the projection nozzle can be welded to the intermediate piece. It is understood that this is only an example and that any other means of fixing the projection nozzle on the intermediate part can be envisaged without departing from the context of the present invention.
- the intermediate piece can in particular be configured so that the brush is caught between hooks formed on this intermediate piece and so that the projection nozzle is attached to an external face of a wall forming the base of the intermediate piece, said external face being turned away from the broom and the wall forming the base being configured to allow passage of the cleaning fluid towards the projection member.
- the projection nozzle is integral with the intermediate part and at least one gutter is formed in the projection nozzle, this gutter extending mainly along a vertical axis
- the gutter participates in forming with one face of the intermediate part a circulation duct for the cleaning fluid.
- the gutter may have a first end arranged substantially in the center of the projection nozzle and a second end opening out on one side of the nozzle to form the projection orifice through which the fluid is projected onto the pane, these two ends being opposite along the vertical axis of extension of the gutter.
- the nozzle is fixed at the end of the movable piston so that the outlet orifice formed in the movable piston opens out opposite the first end.
- the gutter is delimited by two walls which extend away from each other so as to present a flared shape which participates in the bursting of the jet of cleaning fluid to increase the projection surface of this fluid on the glazed surface.
- the cleaning fluid arrives at the outlet orifice formed in the movable piston in a direction parallel to the direction of deployment of this movable piston and that it is then redirected towards the glazed surface. to be cleaned as soon as it leaves this movable piston, thanks to the gutter formed in the projection nozzle, and if necessary by an inclined plane configured to draw the cleaning fluid towards the brush.
- the projection nozzle is advantageously arranged at a center of the wiper blade, relative to its direction of transverse elongation, so that the projection is as homogeneous as possible over the entire glazed surface. to clean.
- the spraying member is formed by at least one spray bar integrated into the wiper blade, this spray bar extending parallel to the transverse axis of main extension of the wiper blade.
- the spray bar is offset, according to the direction of deployment of the movable piston, relative to the wiper blade of the wiper blade.
- the watering ramp can be offset by being disposed in front of the wiper blade with respect to this direction of deployment, that is to say by being further from the hollow body than the blade is. wiping.
- it is understood that such a positioning of the spray bar makes it possible to project the cleaning fluid during the deployment of the telescopic device before the wiper blade wipes the window.
- the sprinkler boom is connected to a chamber for receiving the cleaning fluid made integral with the intermediate part and arranged opposite the through hole made in this intermediate part.
- the spray bar may include at least one channel for the circulation of the cleaning fluid provided in the wiper blade and at least one pipe which places the channel for the circulation of the cleaning fluid in communication with an environment external to the cleaning device and the outlet for the cleaning fluid provided in the movable piston is fluidly connected to at least one channel for the circulation of the cleaning fluid.
- a tube can be arranged between the outlet orifice formed in the movable piston and an end piece of the wiper blade, this end piece being in fluid communication with the circulation channel for the cleaning fluid provided. in the wiper blade.
- the cleaning fluid circulation channel extends over an entire transverse dimension of the wiper blade, that is to say a dimension measured between two ends of the wiper blade opposite along the transverse axis. main extension of the wiper blade and parallel to this main extension transverse axis.
- the cleaning fluid is conveyed to the outlet of the mobile piston, then that it joins the circulation channel formed in the wiper blade, for example by means of the tube arranged between this outlet orifice and the circulation channel, before being projected onto the glazed surface to be cleaned by the at least one pipe provided between this circulation channel for the cleaning fluid and the external environment.
- the sprinkler boom comprises a plurality of conduits distributed along the circulation channel for the cleaning fluid.
- the use of several conduits distributed along the wiper blade makes it possible to ensure a homogeneous distribution of the cleaning fluid sprayed onto the glazed surface to be cleaned and thus to ensure complete cleaning of the whole of this glazed surface. .
- the projection member may be formed by two spray bars which both extend parallel to the main transverse extension axis of the wiper blade and which are then distributed on either side of the wiper blade of this wiper blade.
- the first sprinkler ramp and the second sprinkler rail comprise a common portion formed by the channel for circulating the cleaning fluid provided in the wiper blade and differ from one of them. 'Another in particular by the orientation of their respective conduits formed between the circulation channel and the external environment as mentioned above.
- these watering ramps can be activated simultaneously, or else sequentially, that is to say one after the other.
- activating an arroge ramp is meant the fact of implementing this watering ramp so that it projects the cleaning fluid onto the glass surface to be cleaned.
- the present invention also relates to a motor vehicle comprising at least one optical detection system comprising at least one optical sensor equipped with at least one glazed surface, the vehicle comprising at least one cleaning device according to the invention, this at least one device. cleaning device being configured to operate a cleaning of the glass surface of the optical sensor of the optical detection system.
- the glazed surface of the optical sensor of the optical detection system may be curved, a generator of this curved glass surface then coincides with the direction of deployment of the movable piston.
- the present invention further relates to a method of implementing the cleaning device according to the invention, comprising at least one step during which a control unit receives information relating to a state of soiling of a glazed surface of a optical sensor of an optical detection system, at least one step during which the control unit determines a need for cleaning the glazed surface based on the information received, at least one step during which the control unit sends an instruction to deploy a movable piston of the cleaning device and during which the control unit sends an instruction to spray the cleaning fluid by the spray member, this fluid spray instruction being able to be confused with the instruction to deploy the movable piston in cases where this deployment is effected hydraulically with the cleaning fluid which serves as a hydraulic actuator.
- This process results in a step during which the wiper blade, carried by the movable piston, wipes the cleaning fluid sprayed onto the glass surface.
- the wiper blade comprises two spray bars
- the projection of cleaning fluid can be carried out by a first spraying ramp when the mobile piston is in the deployment phase, then by a second spraying ramp when the mobile piston is in the folding phase, so that the sprayed fluid is immediately wiped off by the wiper blade.
- FIG.l illustrates, in perspective, a telescopic cleaning device according to a first embodiment of the present invention
- FIG.2 illustrates a sectional view of the telescopic cleaning device according to the first embodiment of the present invention, the section being taken along a plane longitudinal and vertical;
- FIG.3 illustrates, in perspective, a projection nozzle of the telescopic cleaning device according to the first embodiment of the present invention
- FIG.4 illustrates a perspective view of the telescopic cleaning device according to the first embodiment of the present invention and on which the projection nozzle of Fig. 3 has been removed;
- FIG.5 illustrates, in perspective, a telescopic cleaning device according to a second embodiment of the present invention
- FIG.6 illustrates, in sectional view, a longitudinal end of the telescopic cleaning device according to the second embodiment of the present invention, this section being taken along the longitudinal and vertical plane;
- FIG.7 illustrates, seen in section, a wiper blade of the telescopic cleaning device according to the second embodiment of the present invention, the section being made along a longitudinal and vertical plane distinct from the section plane of FIG. 6;
- FIG.8 illustrates, seen in section, the wiper of the telescopic cleaning device according to the second embodiment, the cut being made in a transverse and vertical plane perpendicular to the section plane of Figure 6;
- FIG.9 illustrates, in block form, a method of implementing the telescopic cleaning device according to the present invention.
- a longitudinal direction corresponds to a direction of deployment of a movable piston of the telescopic cleaning device, this longitudinal direction being parallel to a longitudinal axis L of a reference L, V, T illustrated in the figures.
- a transverse direction corresponds to a direction parallel to a transverse axis of main extension of a wiper of the telescopic cleaning device, this transverse direction being parallel to a transverse axis T of the reference mark L, V, T and this transverse axis T being perpendicular to the longitudinal axis L.
- a vertical direction corresponds to a direction parallel to a vertical axis V of the reference mark L, V, T, this vertical axis V being perpendicular to the longitudinal axis L and to the transverse axis T of this coordinate system L, V, T.
- the terms “below” and “above” refer to the positioning of an object along the axis vertical, the term “below” designating the objects closest to a glazed surface intended to be cleaned by the telescopic cleaning device according to the invention.
- Figures 1 and 5 both illustrate, in perspective, a telescopic cleaning device 100 according to, respectively, a first embodiment and a second embodiment of the present invention. In the rest of the
- the cleaning device 100 thus comprises at least one hollow body 110 for conveying a cleaning fluid which extends mainly in a longitudinal direction.
- the hollow body 110 houses at least one movable piston 120 which is movable along a direction D of longitudinal deployment, between an unfolded position and a folded position.
- deployment of the mobile piston refer to a movement of this mobile piston from its folded position towards its deployed position
- folding of the mobile piston refer to a movement of this piston. movable from its deployed position to its folded position.
- the hollow body 110 of the cleaning device 100 extends between a first longitudinal end 111 closed by a cover 112 in which is formed an inlet 113 for cleaning fluid FN and a second longitudinal end 114 through which s 'extends, at least partially, the movable piston 120.
- the inlet 113 of cleaning fluid is for example connected to a network
- the cleaning device 100 also comprises at least one wiper blade 130 which extends mainly along a transverse axis X and which is arranged at the free end of the movable piston 120.
- This wiper blade 130 comprises at least a structural element 131 carrying at least one wiping blade 132 intended to come into contact with a glazed surface 300 to be cleaned.
- the wiper blade 132 comprises at least one heel 133 by which it is carried by the structural element 131 and from which extends a lip 134 which forms the portion of this blade. wiping intended to come into contact with the glazed surface 300 to be cleaned.
- the lip 134 is connected to the heel 133 by a hinge 135 which allows in particular the flexibility of the lip 134 and thus a sweep of the glazed surface 300 in two opposite directions.
- the wiper blade 130 is advantageously connected mechanically to the movable piston 120 so that an deployment of this movable piston 120 allows wiping of the glazed surface 300 to be cleaned in a first direction and that a folding of this movable piston allows to him wiping the glass surface for cleaning in a second direction opposite to the first direction.
- the glazed surface 300 is wiped twice, thus improving the efficiency of the cleaning carried out by the telescopic cleaning device 100 according to the invention.
- the movable piston also forms a support for a cleaning fluid projection member 140, so that the telescopic device according to the invention incorporates both a wiping cleaning system and a projection cleaning system. of fluid, united in movement.
- FIG. 2 illustrates the cleaning device 100 according to the first exemplary embodiment, but the functional description which follows is directly transposable to a cleaning device 100 produced according to the second exemplary embodiment.
- This Figure 2 is more particularly a sectional representation of the cleaning device 100 according to the invention, this section being taken along a longitudinal and vertical plane, that is to say a plane in which both the longitudinal axis L of the reference L, V, T and the vertical axis V of this reference L, V, T.
- the cleaning device 100 comprises a hollow body 110 for conveying the cleaning fluid in which the movable piston 120 is housed, movable along the direction D of deployment.
- the movable piston 120 is shown in its folded position.
- the movable piston 120 comprises a peripheral wall 121 which defines a hollow space 122.
- this hollow space 122 is intended to be filled with cleaning fluid.
- the cover 112 which closes the first longitudinal end 111 of the hollow body 110 comprises a shaft 112a which extends in the hollow space 122 of the movable piston 120, in particular so as to serve as a guide means. the sliding of the movable piston 120.
- a first sealing device 123 is arranged between the shaft 112a of the cover 112 and the peripheral wall 121 of the movable piston which delimits the hollow space 122. More particularly, the shaft 112a of the cover 112 comprises an annular groove 112b in which this first sealing device 123 is received. According to an example illustrated here, this first sealing device 123 takes the form of an O-ring.
- the hollow space 122 formed in the movable piston 120 comprises at least two portions of different sections.
- the hollow space 122 can be virtually divided into a first portion 122a having a first section SI and into a second portion 122b having a second section S2 smaller than the first section SI of the first portion 122a.
- the shaft 112a of the cover 112 is housed in the first portion 122a, that is to say the portion of the hollow space 122 having the largest section, and this shaft 112a has, at least partially, a third section S3 identical or substantially identical to the first section SI of the first portion 122a of the hollow space 122.
- the shaft 112a of the cover 112 is at least partially in contact with the wall peripheral 121 which delimits the hollow space 122, and more particularly with a portion of this peripheral wall 121 which delimits the first portion 122a of this hollow space 122.
- the passage from one portion to the other of the hollow space 122 is sudden and the change of section is achieved by means of a shoulder 121a of the peripheral wall 121 which delimits this hollow space 122.
- the first portion 122a of the 'hollow space 122 is delimited, longitudinally, on the one hand by the cover 112 and on the other hand by the shoulder 121a of the peripheral wall 121 of the movable piston 120, and the second portion 122b of this hollow space 122 is as to it delimited longitudinally, on the one hand by
- an outlet orifice 125 configured to allow the ejection of the cleaning fluid.
- This outlet orifice 125 is thus provided at a free end of the movable piston 120, that is to say at one end of this movable piston 120 which extends beyond the hollow body 110.
- the movable piston 120 extends, at least partially, beyond the hollow body 110.
- an opening 116 is formed in the second longitudinal end 114 of the hollow body 110 so as to allow the passage of the piston. mobile 120. More particularly, at least part of the second portion 122b of the hollow space 122 of the movable piston 210 extends through this opening 116, when the movable piston 120 is in its folded position. When the movable piston 120 is in its deployed position, the whole of the second portion 122b of the hollow space 120 extends beyond the second longitudinal end 114 of the hollow body 110 as well as at least part of the first portion 122a of this hollow space 122.
- This annular protuberance 126 is more particularly carried by the peripheral wall 121 of the movable piston 120 and it extends over an entire periphery of this peripheral wall 121.
- peripheral 121 of the movable piston 120 form a one-piece assembly, that is to say an assembly which cannot be separated without causing damage to the peripheral wall 121 or to the annular protuberance 126.
- a ring d The seal 124 rests against this annular protuberance 126, this ring 124 also being in contact with a wall 115 of the hollow body 110.
- this ring 124 comprises at least one outer lip 124a arranged in contact with the wall 115 of the hollow body 110 and an internal lip 124b arranged in contact with the peripheral wall 121 of the movable piston 120, the lips being arranged so that a groove 124c is formed between them, this groove 124c being intended to receive the cleaning fluid.
- the arrival 113 of cleaning fluid leads to this ring 124, and more
- At least one groove 127 - partially visible in FIG. 2 - is made in the peripheral wall 121 of the movable piston 120, and more particularly in a portion of the peripheral wall 121 which participates in delimiting the first portion 122a of the space. hollow 122. More precisely, this at least one groove 127 extends from the end of the movable piston 120, opening out on this free end, and on a longitudinal dimension less than the longitudinal dimension between the cover and the annular groove 112b in which is received the first sealing device 123.
- the grooves 127 extend longitudinally between the cover and the first sealing device 123, so that these grooves 127 are always formed upstream of the first device. sealing 123 relative to a direction of circulation of the cleaning fluid in the folded position.
- this sealing device 123 makes it possible to prevent the cleaning fluid FN from joins the second portion 122b of the hollow space 122, and therefore the outlet orifice 125 at an inopportune moment.
- a plurality of grooves 127 are formed in the peripheral wall 121 of the movable piston 120, and more particularly in an internal face of this peripheral wall 121, that is to say a face facing towards the hollow space 122 and in contact, at least partially, with the shaft 112a of the cover 112.
- these grooves 127 thus form channels for the circulation of the cleaning fluid FN and they are configured to allow this fluid to flow. cleaning from joining the second portion 122b of the hollow space 122 and thus the outlet orifice 125.
- the hollow body 110 for its part, has a cylindrical wall 115 open at its two longitudinal ends 111, 114 as previously mentioned.
- the first longitudinal end 111 is closed by the cover 112 and the second longitudinal end 114 is in turn closed by the movable piston 120 which extends
- the wall 115 of the hollow body 110 has a tab 117 which extends from the second longitudinal end 114 of the hollow body 110, towards its first longitudinal end 111, said tab 117 being housed in the hollow body 110.
- this tab 117 is intended to guide the deployment of the movable piston and to form a stop for the annular protuberance 126 carried by the peripheral wall 121 of the movable piston 120, so as to limit the deployment of the movable piston 120 and prevent it from escaping from the hollow body 110.
- the tab 117 also makes it possible to define a housing for receiving a spring 10 shown schematically in Figure 2 and which extends between the second longitudinal end 114 and the annular protuberance 126 of the movable piston.
- the spring is configured so as to take its rest position in the folded position of the cleaning device.
- the cleaning fluid FN joins the hollow body 110 through the fluid inlet 113 provided in the cover 112.
- the cleaning fluid then fills a delimited chamber. by the sealing ring, the cover, the cylindrical wall of the hollow body and the shaft of the cover.
- the cleaning fluid FN also propagates in the grooves 127 formed on the peripheral wall 121 of the movable piston 120, the circulation of fluid being stopped at the end of the grooves 127.
- the fluid filling the chamber comes in particular into the groove 124c of the ring 124, generating pressure on the ring 124 and the associated movable piston.
- the pressure of the fluid causes a displacement of the movable piston 120 along the direction of deployment D. It is understood that during the deployment of the movable piston 120, there occurs a step during which the grooves 127 extend beyond the first sealing device 123 so that the cleaning fluid FN which circulates therein can then join the second portion 122b of the hollow space 122, then the outlet orifice 125 which allows it to leave the cleaning device 100.
- the spring 10 forming an elastic return device, allows the movable piston to fold up once the glass surface 300 has been cleaned.
- the deployment of the movable piston 120 is here controlled by the arrival of cleaning fluid FN in the hollow body 110 of the cleaning device. It is understood that this is only an exemplary embodiment and that the movable piston 120 could be deployed and folded up using an electric motor or any other compatible means, without departing from the context of the present invention.
- the device is particular in that the movable piston forms a support both for a wiper blade and for a cleaning fluid projection member. More particularly, the movable piston 120 is mechanically linked to the wiper blade 130 of the cleaning device 100 and in that the outlet orifice 125 is in turn in fluid communication with a projection member 140 configured to project the fluid from cleaning upstream of the wiper blade 130 in a direction of movement of this wiper blade 130.
- the first and second embodiments according to the invention differ from one another, in particular by the shape and the arrangement of this projection member 140.
- the wiper blade 130 is mechanically linked to the movable piston 120. According to the first embodiment illustrated here, this mechanical connection is made by means of an intermediate part 150 which also forms the structural element 131. of the wiper blade 130.
- the structural element 131 here takes the form of an anchoring zone which comprises two hooks 137 configured to grip the heel 133 of the wiper blade 132, thus leaving the wiper lip free.
- 134 destined to come to contact of the glazed surface to be cleaned and the hinge which allows this wiping lip 134 to turn over in order to ensure optimum cleaning of the glazed surface 300 concerned.
- the wiper blade 130 comprises at least one end cap 136 which makes it possible to secure the maintenance of this anchoring zone on the heel 133 of the wiper blade 132.
- this at least one end cap 136 participates in maintaining the structural element 131 and the wiper blade 132 together.
- the wiper blade 130 may comprise another end cap similar or identical to that which has just been described and arranged at one end of the wiper blade 130 opposite the carrying end of the end piece. end which has just been described.
- the intermediate piece 150 has an upper part 151 and a lower part 152 arranged one above the other along the vertical axis V of the mark L, V, T illustrated.
- the anchoring zone forming the structural element 131 of the wiper blade 130 is formed in the lower part 152 of this intermediate part 150, that is to say the part of this closest intermediate part. of the glass surface 300 to be cleaned.
- This anchoring zone more particularly has at least two hooks 137 turned towards one another which sandwich the heel 133 of the wiping blade 132.
- the upper part 151 of this intermediate part 150 in turn has a general U-shaped conformation, that is to say that this upper part 151 of the intermediate part 150 comprises at least a first longitudinal branch 153, at least one second longitudinal branch 154 parallel to the first branch 153, and at least one base 155 which connects the first branch to the second branch and which extends perpendicularly, or substantially perpendicularly to the first branch 153 and to the second branch 154.
- this U-shaped upper part 151 forms a reception zone for the free end of movable piston 120, that is to say of the end of this movable piston 120 which extends beyond the hollow body 110 and in which the outlet orifice 125 is formed.
- first branch 153 and the second branch 154 of the upper part 151 of the intermediate part 150 extend from the base 155, towards the hollow body 110. It is also noted that the base 155 is U-shaped for the upper part 151 of the intermediate part 150 has a through hole 156 arranged opposite this outlet orifice 125.
- at least a second sealing device 128 is interposed between the free end of the movable piston 120 and the first and second branches 153, 154 which participate in delimiting the reception zone of this free end of the movable piston 120. More particularly , this second sealing device 128 is arranged in a groove 129 formed in an external face of the peripheral wall 121 of the movable piston 120. For example, this second sealing device 128 may take the form of an O-ring.
- the intermediate piece 150 further comprises at least one flange 157 which extends from the base 155 of the U-shape which forms the reception zone of the movable piston 150, away from the hollow body 110.
- the projection member 140 of the cleaning device 100 is formed by a projection nozzle 141.
- this projection nozzle 141 comprises a gutter 142 arranged opposite the through hole 156 formed in the intermediate part 150.
- this through hole 156 allows a fluid connection between the outlet orifice 125 formed in the movable piston 150 and the gutter 142 formed in the projection nozzle 141.
- the gutter 142 participates in forming, with the face of the base 155 facing the projection member, a channel for the circulation of the cleaning fluid. As illustrated, this gutter 142 extends mainly parallel to the vertical axis V so that the cleaning fluid FN which arrives at the level of the outlet orifice 125 in a direction parallel to the direction D of deployment is redirected. , by a bottom wall 143 of this gutter 142, substantially perpendicularly towards the glazed surface 300 to be cleaned.
- FIG. 3 illustrates more particularly, in perspective, the projection nozzle 141.
- the gutter 142 extends between a first end 142a arranged substantially at the center of the projection nozzle and an open second end 142b which allows the fluid cleaning agent from being projected onto the glass surface to be cleaned. Between these ends, the gutter 142 is delimited by its bottom wall 143 and by at least two side walls 144 which meet at the level of the first end 142a. In other words, it is understood that it is the junction of these two side walls 144 which closes this first end 142a. On the other hand, at the level of the second end 142b of the gutter, these two side walls 144 extend away from one another.
- the open second end 142b has a flared shape, that is to say say that this second end 142b has an increasingly large section away from the first end 142a.
- this makes it possible to enlarge the angle of projection of the cleaning fluid, and thus to project this cleaning fluid onto a larger surface of the glazed surface, therefore improving the cleaning of this glazed surface.
- the second end of the gutter opens onto an inclined plane disposed at the outlet of the gutter to break and deflect the jet of cleaning fluid leaving this gutter.
- the inclination of this plane is configured so that the jet of cleaning fluid is folded appropriately, upstream of the brush 130.
- the gutter 142 is more particularly provided in a stud 145 formed on a face of the projection nozzle 141 turned towards the hollow body when this projection nozzle 141 is in the functional position.
- this stud 145 has an area less than an area of the face of the projection nozzle 141 on which it is provided and this stud 145 has at least one flat 146 formed above the first end 142a of the gutter 142.
- This flat 146 is adapted to cooperate with the rim 157 of the intermediate part 150, this rim 157 being for example illustrated in FIG. 4.
- FIG. 4 thus illustrates, in perspective, the cleaning device 100 according to the first exemplary embodiment, on which the projection nozzle 141 has been removed.
- this Figure 4 makes particularly visible a face of the intermediate part 150 which receives the projection nozzle, as well as the through hole 156 formed in this intermediate part 150, facing the outlet of the movable piston.
- the projection nozzle 141 may for example be welded to the intermediate piece 150. It is understood that this is only one example which cannot limit the present invention.
- the intermediate piece 150 comprises the rim 157 intended to cooperate with the projection nozzle, and more particularly with the flat area described above.
- the rim 157 comprises at least one lug 158, according to the example illustrated two lugs 158, which also participates in maintaining the projection nozzle 141, by cooperating with the flat area formed on the projection nozzle.
- FIG. 5 firstly illustrates, in perspective, the cleaning device 100 according to the second exemplary embodiment.
- the cleaning device 100 comprises the hollow conveying body 110 in which the movable piston 120 slides.
- the cleaning device 100 also comprises the brush. wiper 130 intended to wipe the glass surface 300 to be cleaned.
- this wiper blade 130 comprises at least one structural element 131, a wiper blade 132 and at least one end cap 136, advantageously two end caps 136, configured to hold the element together. structural 131 and the wiper blade 132.
- this wiper blade 130 is mechanically connected to the movable piston by an intermediate part 160, better visible in FIG. 6.
- FIGS. 6 and 7 both represent sections of the wiper blade 130 according to the second embodiment of the present invention, these sections being made along two longitudinal and vertical planes, that is to say planes in which are inscribed the longitudinal axis L and the vertical axis V of the illustrated mark, and at a distance from each other.
- the section illustrated in FIG. 6 is made along a plane passing through the intermediate piece 160 while the section illustrated in FIG. 7 is made along a plane passing between the intermediate piece and one of the end pieces of the brush. wiping.
- This second exemplary embodiment differs from the first exemplary embodiment in particular in that the spraying member 140 is formed by at least one spray bar integrated in the wiper blade 130.
- This spray bar comprises at least one channel.
- the watering boom comprises a plurality of conduits 148 distributed along the wiper blade between the two end caps.
- the projection member comprises two spray bars which include a common portion formed by the circulation channel 147 of the cleaning fluid and which each comprise a plurality of conduits 148 distributed along the brush d 'wiping.
- the two watering ramps, and more particularly the conduits 148 of each of these spray bars are distributed on either side of the wiper blade 132.
- these ducts 148 can be equipped with shut-off means — not shown here — which make it possible to spray no water. cleaning fluid only by one of the spray bars at a time.
- the cleaning fluid can be systematically projected upstream of the wiper blade, whether the piston is in the deployment or retraction phase, so that the cleaning fluid is wiped off immediately after its projection.
- the structural element of the wiper blade is formed by two vertebrae 138, each received in a housing 139 formed in the heel 133 of the wiper blade 132, and more particularly below. of the upper portion 149 of the heel 133 in which the circulation channel 147 of the cleaning fluid is formed.
- the intermediate part 160 comprises an upper part 161 identical to the upper part of the intermediate part according to the first embodiment and a lower part 162 which comprises two hooks 163 which extend in approximation l 'from each other and which enclose, respectively, one of the vertebrae 138 which form the structural element of the wiper blade 130.
- this intermediate part 160 also has a rim 166 which extends away from the hollow body 110 and which cooperates with a chamber 167 for receiving the cleaning fluid.
- this chamber 167 is arranged facing a through hole 168 formed in the intermediate part and arranged facing the outlet orifice 125 of the movable piston 120.
- this through hole 168 makes it possible to establish a connection. fluid between the outlet 125 of the movable piston 120 and the chamber 167 for receiving the cleaning fluid.
- This chamber 167 can for example be welded to the intermediate part 160 and it is extended by a tube 164 - partially visible in FIG. 7 - which enables this chamber 167 in which the cleaning fluid is received with the channel to be placed in communication. circulation 147 provided in the wiper blade 130.
- FIG. 8 illustrates, seen in section from the conveying body, the wiper blade 130, this section being taken along a transverse and vertical plane, that is to say a plane in which are inscribed the transverse axis T and the vertical axis V of the illustrated mark.
- This FIG. 8 thus makes particularly visible the outlet orifice 125 of the movable piston as well as the circulation channel 147 formed in the wiper blade 130.
- the outlet orifice 125 is connected to the tube 164, itself. even connected to the end cap 136, itself in fluid communication with the circulation channel 147 of the cleaning fluid provided in the wiper blade 130.
- the cleaning fluid leaves the hollow body via the outlet orifice 125 formed in the movable piston then it joins, in this order, the tube 164, the end piece 136 and the circulation channel 147.
- a supply channel 165 is formed in the end fitting 136 connected to the tube 164, this supply channel 165 comprising at least a first end 165a which extends into the tube 164 and at least one second end 165b which itself extends into the circulation channel 147 formed in the wiper blade.
- a supply channel 165 is formed in the end fitting 136 connected to the tube 164, this supply channel 165 comprising at least a first end 165a which extends into the tube 164 and at least one second end 165b which itself extends into the circulation channel 147 formed in the wiper blade.
- FIG. 9 finally illustrates, in block form, a method of implementing the cleaning device 100 according to the invention.
- a control unit 200 thus receives information 201 relating to a state of soiling of the glazed surface concerned. Based on this information 201, the control unit 200 determines whether the glazed surface should be cleaned or not. In the event that this glazed surface actually requires cleaning, the control unit 200 sends a first instruction 210 to deploy the movable piston of the cleaning device 100.
- this first instruction 210 may correspond to an instruction d supply of cleaning fluid to the hollow body, or else an instruction to start an electric motor configured to allow the deployment of this movable piston.
- the control unit 200 also sends, advantageously simultaneously, a second instruction 220 for spraying the cleaning fluid towards the glazed surface to be cleaned.
- the deployment of the movable piston causes a sweeping of the glass surface by the wiper blade, so that the cleaning fluid sprayed on the glass surface is immediately dried by this wiper blade.
- this sweeping can also make it possible to clean dirt that a simple projection of cleaning fluid would not make it possible to clean.
- the control unit 200 can send a third instruction 230 to withdraw the movable piston.
- the folding of this movable piston makes it possible to carry out a new sweeping by the wiper blade which makes it possible to definitively ensure that the glazed surface has in fact been cleaned.
- the second instruction 220 is more particularly an instruction for the projection of the cleaning fluid addressed to one of the two sprinkling ramps, in this case a first sprinkling ramp which comprises the conduits arranged upstream of the wiper blade in the direction of movement of the wiper blade.
- the projection of the cleaning fluid is adapted according to the direction of movement of the wiper blade.
- this allows a second cleaning of the glazed surface, thus ensuring a more efficient cleaning of this glazed surface.
- the present invention thus provides a simple and inexpensive means of improving the cleaning of glass surfaces of optical sensors of driving assistance systems.
- the integration of function in a telescopic nozzle, with a movable piston which is at the same time integral with a wiper blade and a projection nozzle, makes it possible to ensure the comings and goings of the wiper blade by the same operation of setting in motion as that necessary for the deployment of the nozzle.
- the present invention should not however be limited to the means and configurations described and illustrated here and it also extends to any equivalent means and any configuration as well as to any technically operative combination of such means.
- the shape and arrangement of the projection member and of the wiper blade can be changed without harming the invention as long as they fulfill the functions described in this document.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1906129A FR3096944B1 (fr) | 2019-06-07 | 2019-06-07 | Dispositif de nettoyage d’une surface vitrée d’un capteur optique pour un véhicule automobile |
PCT/EP2020/062477 WO2020244869A1 (fr) | 2019-06-07 | 2020-05-05 | Dispositif de nettoyage d'une surface vitrée d'un capteur optique pour un véhicule automobile |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3980300A1 true EP3980300A1 (fr) | 2022-04-13 |
Family
ID=68281589
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20721663.1A Pending EP3980300A1 (fr) | 2019-06-07 | 2020-05-05 | Dispositif de nettoyage d'une surface vitrée d'un capteur optique pour un véhicule automobile |
Country Status (6)
Country | Link |
---|---|
US (1) | US20220234548A1 (fr) |
EP (1) | EP3980300A1 (fr) |
JP (1) | JP2022536119A (fr) |
CN (1) | CN113924230A (fr) |
FR (1) | FR3096944B1 (fr) |
WO (1) | WO2020244869A1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3121370A1 (fr) | 2021-03-31 | 2022-10-07 | Université de Lille | Dispositif de nettoyage d’une surface optique |
CN116567382B (zh) * | 2023-05-26 | 2023-12-29 | 扬州智能科技有限公司 | 一种网络视频监控装置 |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2026853A1 (de) * | 1970-06-02 | 1971-12-23 | Jakielaszek, Krzysztof K., 7161 Dappach | Scheibenwisch- und Waschanlage |
FR2130973A5 (fr) * | 1971-03-29 | 1972-11-10 | Cibie Projecteurs | |
DE4109443A1 (de) * | 1991-03-22 | 1992-09-24 | Vdo Schindling | Scheibenwisch- und -waschanlage und stossstange mit einer solchen |
JPH04134775U (ja) * | 1991-06-07 | 1992-12-15 | 関東自動車工業株式会社 | 車両のウインドシールドワイパ |
JPH058705A (ja) * | 1991-06-28 | 1993-01-19 | Fuji Zouen Kk | 車輌用窓のワイパー装置 |
JP3152622B2 (ja) * | 1995-09-19 | 2001-04-03 | 光雄 藤井 | ワイパー洗浄方法及び装置 |
US10351107B2 (en) * | 2012-09-20 | 2019-07-16 | Pasko Todorov Paskov | Magnetic heater for wiper blade system |
DE102013213415A1 (de) * | 2013-07-09 | 2015-01-15 | Continental Teves Ag & Co. Ohg | Optische Überwachungseinrichtung für ein Kraftfahrzeug, insbesondere Überwachungskamera mit einer optisch transparenten Abdeckung |
DE102014010495B3 (de) * | 2014-07-16 | 2015-12-17 | Kautex Textron Gmbh & Co. Kg | Fahrzeugintegriertes Sicht- und Reinigungssystem |
DE102016101745A1 (de) * | 2016-02-01 | 2017-08-03 | Huf Hülsbeck & Fürst Gmbh & Co. Kg | Kameraanordnung eines Kraftfahrzeugs |
FR3047456B1 (fr) * | 2016-02-05 | 2018-03-02 | Valeo Systemes Dessuyage | Systeme de detection optique pour vehicule automobile et dispositif de nettoyage d'un tel systeme |
FR3056518B1 (fr) * | 2016-09-28 | 2018-10-26 | Valeo Systemes D'essuyage | Dispositif de nettoyage d'un capteur optique d'un systeme de detection optique pour vehicule automobile |
FR3056520B1 (fr) * | 2016-09-28 | 2019-08-09 | Valeo Systemes D'essuyage | Dispositif de nettoyage d'un capteur optique d'un systeme de detection optique pour vehicule automobile |
FR3065380B1 (fr) * | 2017-04-25 | 2019-06-21 | Valeo Systemes D'essuyage | Dispositif de nettoyage telescopique |
US10549726B2 (en) * | 2017-06-22 | 2020-02-04 | Ford Global Technologies, Llc | Assembly for cleaning sensor cover and method of using the same |
WO2019097876A1 (fr) * | 2017-11-14 | 2019-05-23 | 株式会社ミツバ | Dispositif de nettoyage et dispositif de détection |
US10259431B1 (en) * | 2017-12-19 | 2019-04-16 | GM Global Technology Operations LLC | Self-centering wiper system for an optical device |
-
2019
- 2019-06-07 FR FR1906129A patent/FR3096944B1/fr active Active
-
2020
- 2020-05-05 EP EP20721663.1A patent/EP3980300A1/fr active Pending
- 2020-05-05 JP JP2021572450A patent/JP2022536119A/ja not_active Ceased
- 2020-05-05 CN CN202080041754.5A patent/CN113924230A/zh active Pending
- 2020-05-05 US US17/596,292 patent/US20220234548A1/en active Pending
- 2020-05-05 WO PCT/EP2020/062477 patent/WO2020244869A1/fr active Application Filing
Also Published As
Publication number | Publication date |
---|---|
US20220234548A1 (en) | 2022-07-28 |
FR3096944A1 (fr) | 2020-12-11 |
FR3096944B1 (fr) | 2021-10-15 |
CN113924230A (zh) | 2022-01-11 |
JP2022536119A (ja) | 2022-08-12 |
WO2020244869A1 (fr) | 2020-12-10 |
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