• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a device for cleaning a sensor of a motor vehicle. A piston (2) is slidably movable in a hollow body (1) of revolution about a longitudinal axis (XX) and carrying at a first end a single nozzle (4) for dispensing one or more fluids, said piston being hollow to allow delivery to the nozzle of at least a first fluid. The hollow piston is made movable, between a rest position and a working position, under the effect of a second fluid to take a working position in which the nozzle is deployed.
    公开号:FR3039113A1
    申请号:FR1556959
    申请日:2015-07-22
    公开日:2017-01-27
    发明作者:Marcel Trebouet；Giuseppe Grasso
    申请人:Valeo Systemes dEssuyage SAS；
    IPC主号:
    专利说明:

    DEVICE FOR CLEANING A SENSOR FOR A VEHICLE
    AUTOMOBILE
    The present invention relates to the field of driving assistance devices and, more particularly, to the field of sensors used for this purpose, such as means of shooting, in particular cameras, or means of detection by waves. electromagnetic fields, in particular radar or lidars. In this field, the invention relates more particularly to the cleaning devices of such shooting means.
    Sensors equip an increasing number of motor vehicles to assist the driver of the vehicle in certain driving situations, one of which, well known, is the parking aid. For this aid to be as effective as possible, the images provided by the captured means, or the data transmitted by the radars for example, must be of the best possible quality, and it is therefore essential to have faces of these sensors. , facing the outside of the vehicle, which are clean. To do this, a sensor cleaning device can be associated with this sensor, and controlled to inject, on said sensor, a stream of cleaning fluid just before the detection is performed. It is advantageous to control the device to determine the duration and the beginning of the cleaning sequence, and to be able to retract the cleaning device after use, so that they do not interfere with the detection when the sensors are in operation, and so that they are protected from shocks, for example. In addition, they must be as compact as possible to meet the congestion constraints of the vehicle. Furthermore, it is desired that such devices allow the injection of different fluids, gaseous or liquid. Indeed, in the case where a cleaning fluid is projected on the sensor, and for example the lens of a camera shooting, to chase the dirt, it is interesting to quickly dry the lens to avoid any risk of pollution of the image by any traces that such a liquid could leave (drops, drips, etc ...).
    The present invention aims to optimize such a cleaning device, both in its cleaning performance in its bulk.
    For this purpose, the present invention relates to a device for cleaning a sensor of a motor vehicle, which comprises a movable piston sliding in a hollow body of revolution about a longitudinal axis and carrying a first end of a single nozzle for dispensing one or more fluids. The piston is dug to allow the delivery of at least one first fluid to the nozzle and is made movable between a rest position and a working position under the effect of a second fluid to take a position of work in which the nozzle is deployed.
    The device according to the invention comprises, in particular, means of admission and selective routing of one or more separate fluids to this single nozzle distribution.
    The means for selective admission and conveyance of one or more fluids may in particular comprise a first fluid intake nozzle, centered on the longitudinal axis of the hollow body, and a second fluid intake nozzle eccentric relative to to said first fluid inlet tip. These fluid intake tips may be formed protruding from an inlet flange overlapping the hollow body and the piston at the end opposite the nozzle.
    According to a characteristic of the invention, the second fluid is conveyed to an interior volume delimited by at least one wall of the hollow piston. And it can be provided that the hollow piston and the selective inlet and conveyance means of one or more fluids are arranged, when the hollow piston is in said working position, so that the second fluid is conveyed via the hollow piston to the cleaning nozzle, so that the second fluid is blocked in said interior volume.
    According to various features of the invention: - the hollow piston comprises a substantially cylindrical central portion, slidable within a coaxial hollow tube of a hollow body of the device according to the invention. Advantageously, the hollow piston also comprises an end portion of distribution in which the single dispensing nozzle is able to be inserted and locked, and an intake portion capable of sliding within a first cavity of the hollow body, larger diameters than the hollow tube of this same hollow body. a distribution duct, a conveying chamber, and a through-inlet chamber, coaxial with each other and with the piston and the hollow body, and communicating with each other, are respectively arranged in the terminal distribution part, the central part , and the inlet portion of the hollow piston. Advantageously, the distribution duct communicates with a distribution channel of the dispensing nozzle, itself connected to an injection channel which opens into an injection orifice of this single dispensing nozzle. the inside diameter of the conveying chamber is, in the vicinity of the zone through which the conveying chamber communicates with the inlet chamber, widened, and the inside diameter of the admission chamber is, over the entire length of the latter, at least equal to the enlarged diameter of the transport chamber. the internal diameter of the distribution duct has, in the vicinity of the zone through which the distribution duct communicates with the conveying chamber, a narrowing, and the shoulder formed, within the distribution duct, by this constriction, accommodates a non-return valve.
    According to an important characteristic of the invention, the means for selective admission and conveyance of one or more fluids comprise an inlet flange able to cooperate simultaneously with a tip of the intake part and with a terminal end of the hollow body to achieve, opposite the single nozzle distribution, a closure of the assembly formed by the hollow body and the hollow piston.
    Advantageously, a conveying tube extends from the inlet flange into the intake chamber and the conveying chamber.
    According to the invention, this conveying tube is able to slide in these chambers, coaxially with them, and extends, opposite them, from the inlet flange, by a first nozzle of 'admission. Furthermore, according to the invention, a second intake nozzle extends from the inlet flange in the same direction as the first intake nozzle. Advantageously, a first inlet channel, passing through, coaxial with the conveying chamber and with the inlet chamber, is arranged within the conveying tube and the first intake nozzle, and a second intake channel. , through, is arranged within the second intake nozzle and the inlet flange. Advantageously, the second intake channel opens into a delimited interior volume, within the device according to the invention, by the inlet flange, the intake portion, and the hollow body.
    According to another important feature of the invention, an annular groove is arranged at the periphery of the conveying tube, in the vicinity of its end opposite to that by which it extends from the inlet flange. This annular groove is advantageously capable of receiving an O-ring which seals the sliding of the conveying tube within the part of the smallest inner diameter of the conveying chamber. More specifically, the dimensions of the O-ring are defined in such a way that, when it is in the enlarged diameter part of the conveying chamber and in the intake chamber, it allows the communication of the defined internal volume. higher with the transport chamber. In other words, this O-ring ensures or not a tight sliding of the conveying tube within the conveying chamber according to the relative positions of these two elements together.
    The operation of the device according to the invention is as follows. Under the effect of the admission of a fluid within the interior volume defined above, via the second intake channel, this internal volume increases, leading to a sliding of the hollow piston around the delivery tube . It follows a longitudinal displacement of the single nozzle distribution to an extended position thereof in which it is remote from the hollow body of the device according to the invention. As long as the relative positions of the conveying tube and the conveying chamber are such that the O-ring seals the sliding of the conveying chamber around the conveying tube, the fluid admitted into the aforementioned interior volume is confined and can not access the delivery room. Advantageously, a seal, for example of the lip seal type, can be placed within this interior volume to ensure this seal. When the relative positions of the conveying tube and the conveying chamber are such that the O-ring is in the enlarged diameter portion of the conveying chamber and / or in the inlet chamber, the latter allows, as indicated above, placing in communication the interior volume defined above with the routing chamber. The fluid admitted into the aforementioned interior volume can then be spread in the conveying chamber, where it can, for example, according to the desired application, be mixed with another fluid admitted to it, by the first admission channel. and by the routing path defined above. The fluid or fluids thus present in the transport chamber may then, through the distribution conduit, be conveyed to the single dispensing nozzle from where they will be delivered by the device according to the invention. The invention thus makes it possible, by a simple and compact device, to choose to selectively distribute: either a single fluid or mixture of fluids, admitted by the only first intake channel. In this case, the distribution will be continuous. - Or a single fluid or mixture of fluids, admitted by the only second intake channel. In this case, the distribution will be discontinuous. - A mixture of fluids or fluid mixtures, admitted respectively by the first and the second intake channel. In this case, a wide variety of distribution profiles can be obtained, depending on the power profiles chosen for the different inlet channels: simultaneous admission of the two fluids or fluid mixtures, admission of a fluid or a mixture of fluids offset in time with respect to the admission of the other fluid or mixture of fluids, etc.
    Advantageously, the device according to the invention also comprises a spring capable of being compressed when, under the effect of the admission of a fluid within the interior volume defined above via the second intake channel, the hollow piston is driven to slide around the delivery tube under the effect of the increase of said interior volume. Conversely, this spring is capable of returning said hollow piston to an initial position when the admission of fluid via the second inlet channel ceases and, under the effect of the decrease of the aforesaid internal volume which results, the relative positions of the conveying chamber and the conveying tube become such that the O-ring ensures the tight sliding of these two elements relative to each other. Other features, details and advantages of the invention will emerge more clearly on reading the description given below as an indication in relation to drawings in which: FIG. 1 is a general view, in section, of a device according to the invention, in a first operating position, - Figure 2 is a general sectional view of a device according to the invention, in a second operating position, - Figure 3 is a general sectional view. of a device according to the invention, in a third operating position, - and Figures 4 and 5 are perspective views of a device according to the invention and the sensor to be cleaned, according to a rest position (Figure 4 ) and a working position (Figure 5).
    It should first be noted that the figures show the invention in detail for its implementation, but that said figures can of course be used to better define the invention where appropriate.
    In the following description, the names "upstream" and "downstream" refer to the flow direction of the cleaning fluids in the cleaning device according to the invention. Thus, the designation "upstream" refers to the side of the device by which the fluid or fluids are admitted into the device according to the invention, and the name "downstream" refers to the side of the device according to the invention by which the fluids are distributed outside the device according to the invention.
    Referring to Figures 4 and 5, a cleaning device 100 is disposed in the vicinity of a sensor 102, fixed on a support 104 forming part or attached to a body part of a motor vehicle. The cleaning device is here arranged in an inclined arrangement with respect to the plane of the support, so that its free end, carrying an injection nozzle 4, when it is deployed (FIG. 5), is opposite the face 106 to clean the sensor, that is to say the side facing the outside of the vehicle, and it is set back from the face to be cleaned 106 when it is retracted (Figure 4).
    The cleaning device 100 according to the invention comprises, in particular, a hollow body 1 having a symmetry of revolution along its longitudinal axis X, and whose interior volume is able to accommodate, sliding along said longitudinal axis X, a hollow piston 2 which also has a symmetry of revolution along the longitudinal axis X.
    More precisely, the hollow body 1 is composed of a first hollow cylinder 10 whose axis of revolution coincides with the longitudinal axis X, and of a substantially cylindrical hollow tube 11 whose axis of revolution is also coincidental. with the longitudinal axis X. The outside diameter of the hollow tube 11 is smaller than the outside diameter of the first cylinder 10. As shown in FIGS. 1 to 3, the hollow tube 11 extends from the downstream end of the first hollow cylinder 10, both outwardly and inwardly of this first hollow cylinder 10. The first hollow cylinder 10 and the hollow tube 11 thus define, in the hollow body 1, respectively a first cavity 12 and a second cavity 13. These two cavities 12, 13 are communicating, coaxial about the longitudinal axis X of the hollow body 1, and the inner diameter of the first cavity 12 is greater than the inside diameter of the second cavity 13. The second cavity 13 is passing through the end of the hollow tube 11, and the first cavity 12 is open at the upstream end of the first hollow cylinder 10, opposite the end from which the hollow tube 11 extends. In other words, the hollow body 1 is substantially in the form of a first hollow cylinder 10, of longitudinal axis X, whose internal volume forms, along the longitudinal axis X, a first cylindrical cavity 12, opening at the upstream intake end of the hollow body, and whose bottom, located at the downstream end opposite the intake end, is pierced coaxially with a hollow tube 11 of smaller diameter, a part of which extends both upstream, inside the first cavity 12, and another part extends downstream, outside the hollow body 1, from the bottom of the first cylinder hollow 10.
    The hollow piston 2, coaxial with the body 1, is schematically formed of a substantially cylindrical central portion 20, from which extend, respectively downstream and upstream, a terminal portion 21 also substantially cylindrical distribution and an intake portion 22. The central portion 20, the terminal distribution portion 21, and the intake portion 22 all have a symmetry of revolution along the longitudinal axis X of the hollow body 1. The outer diameter of the portion distribution terminal 21 is smaller than the inner diameter of the second cavity 13 of the hollow body 1, and the outer diameter of the central portion 20 is very slightly less than the inner diameter of the second chamber 13, so that this central portion 20 can slide neatly within this second cavity 13 without friction and excessive play. Furthermore, the intake portion 22 has a flange 22a projecting substantially perpendicularly from the longitudinal wall delimiting the hollow piston along the axis and a tip longitudinally extending said wall towards the upstream end of the hollow piston 2 having a radial offset, the inner diameter of this nozzle 22b being greater than the inner diameter of the central portion 20. The collar 22a has a maximum outside diameter slightly smaller than the inside diameter of the first cavity 12 formed in the hollow body 1, so that the inlet portion 22 can slide in a manner fitted within this first cavity, without friction and without excessive play.
    According to the invention, the three parts of the hollow piston 2 are pierced coaxially with a set of chambers and through ducts communicating with each other.
    More precisely, the terminal distribution portion 21 is pierced with a distribution duct 23, through which the internal diameter, as shown in the figures, has a narrowing in the vicinity of the end by which the terminal portion 21 is attached to the central portion 20 of the hollow piston 2, that is to say in the vicinity of the upstream end of the terminal distribution portion 21. At this narrowing, the distribution duct 23 thus forms a shoulder 230 According to the invention, a non-return valve 3, which may for example be a ball, a valve, a leaf valve or double leaf, is accommodated in the shoulder 230 formed in the distribution duct 23. At its downstream end, opposite to that by which it is attached to the central portion 20, the terminal distribution portion 21 is arranged to accommodate a dispensing nozzle 4. This nozzle, generally of substantially cylindrical shape The coaxial axis of the longitudinal axis X of the hollow body 1 and the hollow piston 2 is pierced by a distribution channel 41 and a delivery channel 42, communicating with the distribution channel 41 and substantially perpendicular thereto. . The distribution channel 41 extends substantially in the extension of the distribution duct 23 arranged in the end portion 21 of the hollow piston 2, and the delivery channel 42 opens, at the surface of the dispensing nozzle 4, into an orifice of distribution 43.
    The dispensing nozzle 4, the outside diameter of which is substantially equal to that of the end distribution portion 21 of the hollow piston 2, substantially forms a plug at the end of the latter, and is fixed within the distribution duct 23. on the end portion of insertion distribution by force of an appendage 44 delimiting the distribution channel 41. Advantageously, other suitable forms, not detailed here, may be arranged jointly in the downstream end of the distribution duct 23 and on the dispensing nozzle 4 to allow the blocking of the latter within this conduit.
    According to the invention, the central portion 20 of the hollow piston 2 is pierced longitudinally with a conveying chamber 24 passing through and opening on the distribution duct 23. In the vicinity of the intake portion 22, the inside diameter of the chamber 24 is, according to the invention, widened, and the thus widened conveying chamber 24 is extended, within the intake portion, by an inlet chamber 25 whose internal diameter is at least equal to Expanded diameter of the conveying chamber 24. The inlet chamber 25 extends, along the longitudinal axis X, from the upstream end to the downstream end of the intake portion 22. In other words , the inside diameter of the intake portion is greater than the inside diameter of the central portion 20, forming at the junction of these two zones a shoulder 26.
    As they have just been described, the hollow body 1 and the hollow piston 2 thus form an assembly of longitudinal axis of revolution X, in which are successively formed, from a dispensing nozzle 4 placed at the downstream end of an end distribution portion 21 of the hollow piston 2, a distribution duct 23, a conveying chamber 24 and an inlet chamber 25, all coaxial with longitudinal axis X, all through, and all communicating between them as well as with a distribution channel 41 and a delivery channel 42 arranged in the dispensing nozzle 4.
    According to the invention, the cleaning device also comprises a fluid intake and delivery assembly 5 which will now be described more precisely.
    As shown in FIGS. 1 to 3, the fluid intake and delivery assembly 5 comprises an inlet flange 50, arranged in such a way that it can be placed respectively on the upstream intake end. hollow body 1, covering the intake portion 22, to form a closure of these ends. More specifically, the inlet flange 50 comprises, in its downstream face intended to close off said ends, first and second annular grooves, respectively 51, 52, arranged coaxially around the longitudinal axis X of the hollow body 1 and the hollow piston 2.
    The first groove 51 is defined in such a way that it can receive, in support, the tip 22b arranged at the upstream end of the inlet portion 22 of the hollow piston 2, and the second groove 52 is arranged to accommodate a endpiece 14 arranged at the upstream end of the hollow body 1. Thus, the inlet flange 50 is adapted to cooperate with both the hollow piston 2 and with the hollow body 1 to simultaneously close the upstream inlet ends of the inlet. these two pieces. The flange comes into overlap of the upstream intake end of the hollow body, and forms a means for sealing this hollow body by fastening means provided for this purpose, and for example screwing or latching means, on the body.
    According to the invention, the inlet portion 22 and the inlet flange 50 are arranged in such a way that, when the inlet flange 50 is put in place at the upstream end of the hollow body 1 and the part of the admission 22, it delimits, with these elements, an inner annular volume V, as shown in Figures 1 to 3. More specifically, the volume V is delimited, upstream, by a downstream face of the inlet flange 50 and downstream, by an upstream face of the flange 22a of the intake portion 22 and, radially, the volume V is respectively delimited, on the one hand, by the inner wall of the first cylinder 10 of the hollow body 1 and, on the other hand, by the outer walls of the end piece 22b of the intake portion 22.
    According to the invention, a conveying tube 53, centered on the longitudinal axis X, extends downstream of the cleaning device, from the downstream face of the inlet flange 50. routing extends outwardly of the device, on the upstream side of the inlet flange 50, by a first intake nozzle 54. The outer diameter of the delivery tube 53 is advantageously chosen very slightly less than the inside diameter of the conveying chamber 24, so that the conveying tube 53 can slide freely in said conveying chamber. The conveying tube 53 and the first intake nozzle 54 are pierced with a first through-channel 55 which extends from one end to the other of the delivery tube 53 and the first end-piece In accordance with the preferred embodiment illustrated in FIGS. 1 to 3, the inside diameter of the first inlet channel 55 is substantially equal to the inside diameter of the distribution duct 23 in its reduced portion, upstream of a Non-return valve 3. Advantageously also, a clearance is arranged at the periphery of the downstream end of the conveying tube 53. This clearance thus defines an annular shoulder 530 of small width at the downstream periphery of the conveying tube 53. and a downstream end piece 531 of this conveying tube.
    According to a characteristic of the invention, an annular groove 532 is arranged radially at the periphery of the conveying tube 53. The annular groove 532 is advantageously placed close to the downstream end of the delivery tube 53. According to the invention the annular groove 532 advantageously accommodates a gasket 6, preferably a ring, the role of which will be specified below and the dimensions of which are advantageously chosen, according to the invention, in such a way that it ensures the leaktight sliding of the conveying tube 53 in the smaller diameter portion of the conveying chamber 24.
    According to the invention also, a second intake channel 56 is arranged in a second intake nozzle 57 which extends from the inlet flange 50, upstream thereof, and parallel to the first nozzle. 54. The second inlet channel passes through the inlet flange 50, and is placed on the latter in such a way that it opens advantageously into the volume V defined above.
    The operation of the cleaning device according to the invention will now be described, in which the hollow piston is made movable inside the hollow body under the effect of a fluid, between a first position illustrated in FIGS. 1 and 4. and a work position, illustrated in Figures 2, 3 and 5.
    In the first position, or rest position, of the device, if one imagines injecting a first fluid by the first injection nozzle 54 in the direction illustrated by the arrow Fl, this first fluid is first conveyed by the first intake channel 55, to the downstream end of the delivery tube 53. There, the first fluid opens into the conveying chamber 24, at the downstream end of the end piece 531 of the tube 53. In the position illustrated in FIG. 1, the presence of the seal 6, which seals the sliding of the delivery tube 53 in the smaller diameter part of the conveying chamber 24, prevents any return of the first fluid upstream of the delivery chamber 24 of the device. The first fluid is then conveyed into the distribution duct 23, in which the non-return valve 3 also prevents any upwelling, then, finally, towards the distribution channel 41 and, finally, in the distribution channel. delivery 42 then through the dispensing orifice 43. In the rest position shown in FIG. 1, it is therefore possible to inject, through the distribution nozzle 4, a first fluid conveyed through the cleaning device according to FIG. the invention. However, this injection is done while the dispensing orifice is in a retracted position, that is to say with a hollow body 2 in an original position where the intake portion 22 is in the vicinity of the flange input, and it is understood that in this retracted position, the fluid ejected by the nozzle is not directed on the face to be cleaned from the sensor, for example the lens of a camera.
    To obtain the second position of the cleaning device according to the invention, or first working position, illustrated in FIG. 2, in which the nozzle is deployed longitudinally so as to face the face to be cleaned of the sensor (as visible on FIG. 5), a second fluid is injected into the device, more precisely via the second intake nozzle 57, in the direction represented by the arrow F2. The second fluid is fed into the second intake channel 56 to the inner annular volume V defined above. There, under the effect of its injection pressure, the second fluid pushes the inlet portion 22 of the hollow piston 2 towards the downstream of the device according to the invention, so that the volume V increases. Advantageously, a seal 7, for example of the lip seal type, is placed on the upstream face of the inlet portion 22 which is in contact with the second fluid, in order to prevent any leakage thereof outside the volume V. The hollow piston 2 then slides within the hollow body 1, around the delivery tube 53. In this sliding, the delivery chamber slides around the delivery tube 53 relative thereto, and the part end 21 of the hollow piston moves downstream of the cleaning device, thereby defining a first deployed position of the injection nozzle 4. In the position illustrated in FIG. 2, the relative positions of the conveying chamber 24 and of the conveying tube 53 which result from the filling of the internal volume V by the second fluid, are such that the sealing of the sliding of these two elements relative to each other is always ensured by the presence of the O-ring 6 .
    The first fluid can then be injected and conveyed within the device according to the invention to the dispensing orifice 43 of the dispensing nozzle 4, from where it is distributed according to the directions illustrated by the arrows fl as it comes to be described.
    FIG. 3 illustrates a position in which the admission of the second fluid has been maintained, so that the internal volume V has been further increased and the downstream stroke of the hollow piston 2 has been prolonged. In this position, the O-ring 6 and at least the annular shoulder 530 are located within the inlet chamber 25 formed in the inlet portion 22, whose inside diameter is at least slightly greater than the largest inside diameter. 24. As a result, the O-ring 6 no longer seals the sliding of the conveying tube 53 within the conveying chamber 24, and a transverse clearance is provided between the O-ring 6 and the inlet chamber 25, so as to put in communication the interior volume V defined above and said delivery chamber 24, as shown in Figure 3. It follows that there is no more obstacle to the passage of the second fluid in the conveying chamber 24, via the inlet chamber 25 and the periphery of the end piece 531 of the delivery tube 53. This passage is illustrated in FIG. by the arrows f2. First and second fluids can then mix in the conveying chamber 24, then in the distribution duct 23 and, finally, in the injection nozzle 4, from which the mixture thus obtained can be delivered via the orifice of FIG. distribution 43.
    It should be noted that the presence of the non-return valve 3 makes it possible, as previously, to avoid any upward movement of the fluid mixture upstream. It should also be noted that, in this position, the dispensing nozzle 4 is again pushed downstream of the device, in a second deployed position. Finally, it should be noted that the presence of the end-piece 531, whose outer diameter is substantially smaller than the outside diameter of the delivery tube 53, allows both easier routing of the fluid mixture within the chamber. routing, while avoiding any effect of "suction" when the O-ring 6 crosses the enlarged area of the inner diameter of the conveying chamber 24. For this purpose, the precise location of the annular groove 532 which hosts the seal 6 and the longitudinal dimension of this end piece will advantageously be chosen to minimize the distance separating the crossing of this widening by the O-ring 6 and its crossing by the shoulder 530 of the delivery tube 53. In other words , groove 532 and shoulder 531 will advantageously be formed closer to each other in the longitudinal direction of the device according to the invention.
    As shown in FIGS. 1 to 3, a spring 8 is advantageously disposed in the first cavity 12 of the hollow body 1. More precisely, the spring 8 is placed around the hollow piston 2, within the first cavity 12, and it is respectively taken between, upstream, the flange 22a of the intake portion 22 and, downstream, a wall of the downstream bottom of the first cavity 12. In its race under the effect of the admission of the second fluid, the hollow piston compresses this spring 8, as shown more precisely in Figures 2 and 3.
    When the admission of the second fluid ceases, the downstream stroke of the hollow piston also ceases, and the restoring force of the spring 8 then brings the hollow piston 2 upstream, so that the liquid remaining in the volume Inside V returns to the tank under the effect of this pressure. More specifically, the hollow piston 2 is brought upstream until the O-ring 6 crosses again, but upstream this time, the widening zone of the inner diameter of the conveying chamber 24. Once this area is crossed, the O-ring seals again the relative sliding of the transport chamber and the transport tube. An auxiliary device, not shown in the figures, may be provided, which is attached to the cleaning device, so that, once the admission of the second fluid into the interior volume V has been stopped, and once the hollow piston has returned to its position such that 2, the residual quantity of second fluid in said internal volume V is drained, so that the return spring 8, in its upstream stroke, brings the whole cleaning device back into its position. initial, rest, as shown in Figure 4.
    According to the quantity of second fluid admitted into the device, the invention thus makes it possible to selectively convey, up to the single distribution nozzle 4 and its dispensing orifice 43, either a single first fluid or a mixture of first fluid and second fluid. It should of course be noted that the first and second fluids may be gaseous or liquid without damaging the invention, just as they may consist of a single fluid or mixtures of fluids without modifying the fluid. invention or its operation. A preferred application is to provide that the second fluid is cleaning liquid, so that it leaves through the cleaning nozzle when it has been brought into the working position, facing the face of the sensor to be cleaned and by example a camera lens, by the action of this cleaning liquid, and to provide that the first fluid is air, which is injected into the device after the passage of the cleaning liquid in the nozzle of injection to purge the residual liquid in the device, and avoid the possibility of frost, and / or to come to dry the cleaned lens.
    Moreover, the device according to the invention, as just described and as illustrated by the figures, is simple, reliable operation, and easy production in large series. It is therefore of particular interest for the automotive application it aims.
    In an alternative embodiment of the invention, provision can be made for the second fluid to participate only in the longitudinal displacement of the hollow piston in order to bring the nozzle into the extended working position, and only the first fluid to be injected into the chamber. routing, the distribution channel and the nozzle. To do this, it will be known how to dimension the hollow piston differently, or more easily the sealing tube 53 so that, in the working position, the seal 6 is always in the part of smaller internal diameter of the conveying chamber. . It will also be possible to provide an inlet chamber 25 of the same internal diameter as that of the conveying chamber. In all these cases, when the hollow piston is in the working position, the second fluid remains locked in the internal volume V and it can not come into the conveying chamber 24 and mix with the first fluid. In this case, provision may be made to route to the nozzle either a first fluid or a mixture of first fluid and second fluid, but only via the first intake channel 55.
    It should be noted that the invention can not be reduced to the means and configurations described and illustrated, but it also applies to any equivalent means or configurations and any combination of such means. By way of example, a heating device can be provided upstream of the cleaning device so that the fluids routed and selectively distributed are hot fluids to facilitate the subsequent drying of the face to be cleaned from the sensor and to prevent the formation of ice on the surface. inside the cleaning device.
    权利要求:
    Claims (19)
    [1" id="c-fr-0001]
    1. Device for cleaning a sensor of a motor vehicle, characterized in that it comprises a piston (2) movable in sliding in a hollow body (1) of revolution about a longitudinal axis (XX) and carrying at a first end of a single nozzle (4) for dispensing one or more fluids, said piston being hollow to allow the delivery to the nozzle of at least a first fluid, said hollow piston being made movable, between a rest position and a working position, under the effect of a second fluid to take a working position in which the nozzle is deployed.
    [2" id="c-fr-0002]
    2. Device according to claim 1, characterized in that it comprises means for admission and selective routing of one or more separate fluids to this single nozzle distribution (4).
    [3" id="c-fr-0003]
    3. Device according to claim 2, characterized in that the means for admission and selective flow of one or more fluids comprise a first fluid inlet nozzle (54), centered on the longitudinal axis (XX) the hollow body, and a second fluid inlet (57), eccentric with respect to said first fluid inlet.
    [4" id="c-fr-0004]
    4. Device according to claim 3, characterized in that the fluid inlet tips are formed projecting from an inlet flange (50) overlapping the hollow body and the piston at the end opposite the nozzle .
    [5" id="c-fr-0005]
    5. Device according to one of the preceding claims, characterized in that the second fluid is conveyed to an inner volume (V), delimited by at least one wall of the hollow piston (2).
    [6" id="c-fr-0006]
    6. Device according to the preceding claim, characterized in that the hollow piston (2) and the selective inlet and conveyance means of one or more fluids are arranged so that the second fluid is conveyed via the hollow piston ( 2) to the cleaning nozzle (4), when the hollow piston is in said working position.
    [7" id="c-fr-0007]
    7. Device according to claim 5, characterized in that the hollow piston (2) and the selective admission and conveying means of one or more fluids are arranged so that the second fluid is blocked in said inner volume ( V) when the hollow piston (2) is in said working position.
    [8" id="c-fr-0008]
    8. Device according to one of the preceding claims, characterized in that elastic return means in position (8) are housed in the hollow body (1) to bear against the hollow piston (2) and tend to recall in the position of rest said piston.
    [9" id="c-fr-0009]
    9. Device according to one of the preceding claims, characterized in that the hollow piston (2) comprises a substantially cylindrical central portion (20), slidable within a hollow tube (11) coaxial with the hollow body (1). ), an end distribution portion (21) in which the single dispensing nozzle (4) is insertable and locked, and an inlet portion (22) slidable within a first cavity (12) hollow body (1).
    [10" id="c-fr-0010]
    10. Device according to the preceding claim, characterized in that a distribution duct (23), a conveying chamber (24), and an inlet chamber (25) through, coaxial, and communicating with each other, are respectively arranged in the terminal distribution portion (21), the central portion (20), and the inlet portion (22) of the hollow piston (2), and in that the distribution duct (23) communicates with a channel of distribution (41) of the dispensing nozzle (4), itself connected to an injection channel (42) which opens into an injection port (43) of this single nozzle distribution (4).
    [11" id="c-fr-0011]
    11. Device according to the preceding claim, characterized in that the inner diameter of the distribution duct (23) has, in the vicinity of the zone through which the distribution duct (23) communicates with the conveying chamber (24), a narrowing, and in that the shoulder (230) formed in the distribution duct (23), by this narrowing, accommodates a non-return valve (3).
    [12" id="c-fr-0012]
    Device according to one of the preceding claims, in combination with at least claim 4, characterized in that a conveying tube (53) extends from the inlet flange (50) to in the inlet chamber (25) and the conveying chamber (24), in which it is able to slide coaxially with the latter, and extends, opposite these, from the inlet flange (50), by the first inlet nozzle (54).
    [13" id="c-fr-0013]
    13. Device according to the preceding claim, characterized in that a first inlet channel, passing through, coaxial with the conveying chamber (24) and with the inlet chamber (25), is arranged within the tube d (53) and the first intake nozzle (54), and that a second through-passage (56) is arranged within the second intake nozzle (57) and the flange input (50).
    [14" id="c-fr-0014]
    14. Device according to the preceding claim, in combination with at least claim 5, characterized in that the second inlet channel (56) opens into an interior volume (V) defined by the inlet flange (50). ), the intake portion (22), and the hollow body (1).
    [15" id="c-fr-0015]
    15. Device according to claim 11, characterized in that, under the effect of the admission of a fluid into the interior volume (V) via the second inlet channel (56), the sliding of the hollow piston (2) around the conveying tube (53) resulting from the increase in the internal volume (V) leads to a longitudinal displacement of the single distribution nozzle (4) to an extended position thereof in which is away from the hollow body (1).
    [16" id="c-fr-0016]
    16. Device according to one of claims 12 to 15, characterized in that an annular groove (532) is arranged at the periphery of the conveying tube (53), near its end opposite to that by which it s extends from the inlet flange (50), and in that the annular groove (532) is adapted to receive a seal (6), preferably an O-ring, which seals the sliding of the conveying tube ( 53) within the smaller inner diameter portion of the conveying chamber (24).
    [17" id="c-fr-0017]
    17. Device according to the preceding claim, characterized in that it comprises a seal (7) adapted to seal the interior volume (V) when it is filled with a fluid admitted thereto by the second channel. inlet (56) and as long as the seal (6) seals the sliding of the conveying tube (53) within the conveying chamber.
    [18" id="c-fr-0018]
    Device according to one of Claims 10 to 17, in combination with Claim 6, characterized in that the inside diameter of the conveying chamber (24) is smaller than the inside diameter of the inlet chamber (25) .
    [19" id="c-fr-0019]
    19. Device according to the preceding claim, in combination with at least claim 16 characterized in that the dimensions of the seal (6) are defined in such a way that, when it is in the inlet chamber (25), it allows the communication of the interior volume (V) with the routing chamber (24).
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    同族专利:
    公开号 | 公开日
    CN106427895B|2019-12-24|
    RU2016129762A|2018-01-25|
    US10569747B2|2020-02-25|
    JP6800638B2|2020-12-16|
    US20170021810A1|2017-01-26|
    EP3121070A1|2017-01-25|
    KR20170012100A|2017-02-02|
    ES2684801T3|2018-10-04|
    CN106427895A|2017-02-22|
    EP3121070B1|2018-06-06|
    JP2017024712A|2017-02-02|
    FR3039113B1|2017-07-28|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP1970269A2|2007-03-13|2008-09-17|Mann+Hummel Gmbh|Telescopic nozzle, particularly in a headlight cleaning device|
    US20150138357A1|2011-03-10|2015-05-21|Alan Scot Romack|Integrated Automotive System, Pop Up Nozzle Assembly and Remote Control Method for Cleaning a Wide Angle Image Sensors Exterior Surface|
    JPS5848922Y2|1979-04-27|1983-11-08|
    FR2675758B1|1991-04-25|1993-08-20|Valeo Vision|DEVICE FOR WASHING THE WINDOW OF A MOTOR VEHICLE PROJECTOR.|
    GB2267215B|1992-05-18|1995-12-06|Valeo Wiper Systems Ltd|Washing system for motor vehicle screens|
    DE4416924A1|1994-05-13|1995-11-16|Hella Kg Hueck & Co|Nozzle holder for a windscreen washer system for vehicles, in particular vehicle headlights|
    US5657929A|1995-07-28|1997-08-19|Sprague Controls, Inc.|Air-liquid system for cleaning vehicle headlight lens and similar surfaces|
    JP2002178886A|2000-12-11|2002-06-26|Asmo Co Ltd|Head lamp cleaner|
    DE10220579B4|2002-05-08|2012-02-02|Fico Transpar, S.A.|Cleaning system for headlights of motor vehicles|
    US8366021B2|2010-09-03|2013-02-05|Toyota Motor Engineering & Manufacturing North America, Inc.|Windshield cleaner|
    CN104135986A|2012-02-29|2014-11-05|赛诺菲-安万特德国有限公司|Extraction device for a single extraction of a medicament from a container|
    JP6379665B2|2013-08-12|2018-08-29|株式会社デンソー|In-vehicle optical sensor cleaning device|
    JP6417757B2|2013-09-19|2018-11-07|株式会社デンソー|In-vehicle optical sensor cleaning device|
    JP6379706B2|2014-06-12|2018-08-29|株式会社デンソー|In-vehicle sensor cleaning device|
    US10252703B2|2015-05-20|2019-04-09|Denso Corporation|System for cleaning on-vehicle optical sensor and method for the same|
    JP6597334B2|2015-05-28|2019-10-30|株式会社デンソー|In-vehicle optical sensor cleaning device|US10350647B2|2011-03-10|2019-07-16|Dlhbowles, Inc.|Integrated automotive system, nozzle assembly and remote control method for cleaning an image sensor's exterior or objective lens surface|
    US10432827B2|2011-03-10|2019-10-01|Dlhbowles, Inc.|Integrated automotive system, nozzle assembly and remote control method for cleaning an image sensors exterior or objective lens surface|
    CA2982271C|2014-04-11|2021-08-24|Russell Hester|Integrated automotive system, compact, low-profile nozzle assembly and compact fluidic circuit for cleaning a wide-angle image sensor's exterior surface|
    US10525937B2|2014-04-16|2020-01-07|Dlhbowles, Inc.|Integrated multi image sensor and lens washing nozzle assembly and method for simultaneously cleaning a plurality of image sensors|
    CN108602491A|2016-03-31|2018-09-28|株式会社电装|Vehicle-mounted optical sensor cleaning device|
    JP6702093B2|2016-08-31|2020-05-27|株式会社デンソー|In-vehicle optical sensor cleaning device|
    FR3056515B1|2016-09-28|2019-07-12|Valeo Systemes D'essuyage|DEVICE FOR CLEANING AN OUTER SURFACE OF A SENSOR OF A MOTOR VEHICLE|
    FR3056518B1|2016-09-28|2018-10-26|Valeo Systemes D'essuyage|DEVICE FOR CLEANING AN OPTICAL SENSOR OF AN OPTICAL DETECTION SYSTEM FOR A MOTOR VEHICLE|
    FR3056520B1|2016-09-28|2019-08-09|Valeo Systemes D'essuyage|DEVICE FOR CLEANING AN OPTICAL SENSOR OF AN OPTICAL DETECTION SYSTEM FOR A MOTOR VEHICLE|
    EP3318452A1|2016-11-07|2018-05-09|Fico Transpar, S.A.|Fluid-ejection device|
    US20180272997A1|2017-03-23|2018-09-27|GM Global Technology Operations LLC|Heat sink and cleaning device|
    FR3065379B1|2017-04-25|2020-11-06|Valeo Systemes Dessuyage|TELESCOPIC CLEANING DEVICE|
    FR3065381B1|2017-04-25|2020-10-30|Valeo Systemes Dessuyage|TELESCOPIC CLEANING DEVICE|
    FR3065380B1|2017-04-25|2019-06-21|Valeo Systemes D'essuyage|TELESCOPIC CLEANING DEVICE|
    FR3067995B1|2017-06-22|2021-03-19|Valeo Systemes Dessuyage|OPTICAL SENSOR SUPPORT PLATE, TRANSMISSION BODY FOR A TELESCOPIC CLEANING DEVICE FOR THIS OPTICAL SENSOR, AND QUICK MOUNTING DEVICE BY SNAPPING THESE COMPONENTS|
    JP6792534B2|2017-10-11|2020-11-25|株式会社ニフコ|Fluid discharge mechanism and fluid spraying device for vehicle cameras or sensors|
    JP6929521B2|2017-10-20|2021-09-01|株式会社アイシン|Cleaning equipment|
    DE102018100805A1|2018-01-16|2019-07-18|Connaught Electronics Ltd.|Cleaning device for cleaning a translucent front element of an optical sensor for a motor vehicle, arrangement and method|
    US20220009453A1|2020-07-09|2022-01-13|A. Raymond Et Cie|Bracket and modular assembly for fluid spray system|
    法律状态:
    2016-07-29| PLFP| Fee payment|Year of fee payment: 2 |
    2017-01-27| PLSC| Search report ready|Effective date: 20170127 |
    2017-07-31| PLFP| Fee payment|Year of fee payment: 3 |
    2018-07-27| PLFP| Fee payment|Year of fee payment: 4 |
    2020-04-10| ST| Notification of lapse|Effective date: 20200306 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1556959A|FR3039113B1|2015-07-22|2015-07-22|DEVICE FOR CLEANING A SENSOR FOR A MOTOR VEHICLE|FR1556959A| FR3039113B1|2015-07-22|2015-07-22|DEVICE FOR CLEANING A SENSOR FOR A MOTOR VEHICLE|
    RU2016129762A| RU2016129762A|2015-07-22|2016-07-20|CAR MONITORING CLEANING DEVICE|
    US15/214,508| US10569747B2|2015-07-22|2016-07-20|Sensor cleaning device for a motor vehicle|
    EP16180474.5A| EP3121070B1|2015-07-22|2016-07-21|Sensor cleaning device for a motor vehicle|
    KR1020160092629A| KR20170012100A|2015-07-22|2016-07-21|Sensor cleaning device for a motor vehicle|
    JP2016143474A| JP6800638B2|2015-07-22|2016-07-21|Sensor cleaning device for automobiles|
    ES16180474.5T| ES2684801T3|2015-07-22|2016-07-21|Cleaning device for a motor vehicle sensor|
    CN201610811827.XA| CN106427895B|2015-07-22|2016-07-22|Sensor cleaning device for a motor vehicle|
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