WO2023006766A1 - Système d'essuyage et contrôle de l'injection de fluide de nettoyage dans un système d'essuyage - Google Patents
Système d'essuyage et contrôle de l'injection de fluide de nettoyage dans un système d'essuyage Download PDFInfo
- Publication number
- WO2023006766A1 WO2023006766A1 PCT/EP2022/070976 EP2022070976W WO2023006766A1 WO 2023006766 A1 WO2023006766 A1 WO 2023006766A1 EP 2022070976 W EP2022070976 W EP 2022070976W WO 2023006766 A1 WO2023006766 A1 WO 2023006766A1
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- WIPO (PCT)
- Prior art keywords
- injection
- channel
- pump
- longitudinal channel
- cleaning fluid
- Prior art date
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- 238000002347 injection Methods 0.000 title claims abstract description 171
- 239000007924 injection Substances 0.000 title claims abstract description 171
- 239000012530 fluid Substances 0.000 title claims abstract description 145
- 238000004140 cleaning Methods 0.000 title claims abstract description 116
- 230000003287 optical effect Effects 0.000 claims description 20
- 244000007853 Sarothamnus scoparius Species 0.000 claims description 7
- 230000003213 activating effect Effects 0.000 claims description 6
- 230000002457 bidirectional effect Effects 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 230000004913 activation Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 2
- 239000007921 spray Substances 0.000 abstract description 5
- 238000010408 sweeping Methods 0.000 description 23
- 230000033001 locomotion Effects 0.000 description 6
- 230000001174 ascending effect Effects 0.000 description 5
- 239000011521 glass Substances 0.000 description 5
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 230000000295 complement effect Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000011176 pooling Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S1/00—Cleaning of vehicles
- B60S1/02—Cleaning windscreens, windows or optical devices
- B60S1/46—Cleaning windscreens, windows or optical devices using liquid; Windscreen washers
- B60S1/48—Liquid supply therefor
- B60S1/52—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
- B60S1/56—Cleaning windscreens, windows or optical devices specially adapted for cleaning other parts or devices than front windows or windscreens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S1/00—Cleaning of vehicles
- B60S1/02—Cleaning windscreens, windows or optical devices
- B60S1/04—Wipers or the like, e.g. scrapers
- B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
- B60S1/38—Wiper blades
- B60S1/3806—Means, or measures taken, for influencing the aerodynamic quality of the wiper blades
- B60S1/381—Spoilers mounted on the squeegee or on the vertebra
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S1/00—Cleaning of vehicles
- B60S1/02—Cleaning windscreens, windows or optical devices
- B60S1/04—Wipers or the like, e.g. scrapers
- B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
- B60S1/38—Wiper blades
- B60S1/3848—Flat-type wiper blade, i.e. without harness
- B60S1/3886—End caps
- B60S1/3894—End caps having a particular shape
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S1/00—Cleaning of vehicles
- B60S1/02—Cleaning windscreens, windows or optical devices
- B60S1/46—Cleaning windscreens, windows or optical devices using liquid; Windscreen washers
- B60S1/48—Liquid supply therefor
- B60S1/481—Liquid supply therefor the operation of at least part of the liquid supply being controlled by electric means
- B60S1/482—Liquid supply therefor the operation of at least part of the liquid supply being controlled by electric means combined with the operation of windscreen wipers
Definitions
- the present invention relates to a wiper system, in particular for a motor vehicle, and in particular to the control of the injection of cleaning fluid into such a system.
- Wiping systems with two longitudinal channels are known, one being dedicated to a projection of cleaning fluid in front of the blade in a first sweeping direction, and the other being dedicated to a projection of cleaning fluid in front of the broom in a second sweeping direction.
- wiping systems provide for a projection of fluid on the glass elsewhere than in the blade: for example, certain wiping systems, called “wet arm”, provide for a projection from an arm which drives the blade in rotation, or from a fixed position on a bonnet of the motor vehicle.
- Motor vehicles include more and more sensors, most of which have an optical surface. It is necessary to clean such an optical surface in order to improve the quality of the acquired data.
- the present invention relates to a wiping system comprising:
- a wiper blade configured to wipe a visibility zone of a windshield of the motor vehicle and capable of being driven by the arm and comprising at least one longitudinal channel, and at least one nozzle element, in fluid communication with the at least one longitudinal channel and configured to project cleaning fluid towards at least one sensor disposed outside the zone of visibility, said nozzle element being arranged in a longitudinal end zone of the wiper blade;
- an injection assembly capable of injecting a cleaning fluid into the longitudinal channel, said injection assembly comprising at least one pump;
- control unit capable of controlling the injection assembly in real time according to arm or wiper blade position data.
- control unit control determines that the arm or the wiper blade is in a given angular sector, the angular sector being less than, or more restricted than, an angular sweep range of the wiper system, the control unit control is able to control the injection by the cleaning fluid injection assembly at least into the longitudinal channel.
- the nozzle element can thus point in a direction other than towards the visibility surface of the windshield on which other nozzle elements can be capable of projecting cleaning fluid.
- the direction of projection towards the sensor outside the zone of visibility can be mainly in a longitudinal direction of the wiper blade, which means that the angle of the given direction with a longitudinal direction is smaller than the angle formed by the given direction with a direction normal to the longitudinal direction. It is thus made possible to clean an optical surface of a motor vehicle sensor to which the end zone of the wiper blade faces in a given angular sector.
- the given angular sector can be determined according to a geometry of the wiper system, a geometry of an optical surface of the sensor, and a relative position of the wiper system and the sensor, when the wiper system is mounted on a motor vehicle comprising the sensor, so that the nozzle element projects cleaning fluid in the direction of the optical surface of the sensor when the arm or the blade is positioned in the angular sector.
- Such an angular sector can be predefined, but can also be configurable, depending in particular on the addition or displacement of a sensor and its optical surface.
- the position data of the arm or of the brush can come from the motor or can come from a detection device.
- position data from the wiper system motor makes it possible to limit the number of detection devices used, while having real-time data on the position and speed of the arm or the wiper blade.
- the wiper blade may comprise at least one other longitudinal channel and at least one other nozzle element in fluid communication with the other longitudinal channel and capable of projecting cleaning fluid onto the zone of visibility in a direction inclined with respect to a longitudinal direction of the brush, and the injection assembly may be capable of selectively injecting the cleaning fluid into the longitudinal channel and/or into the other longitudinal channel.
- the direction inclined with respect to the longitudinal direction of the broom can in particular be normal to the longitudinal direction of the broom, or form a small angle, less than 20°, with respect to a normal to the longitudinal direction of the broom.
- the other longitudinal channels comprise at least a first longitudinal channel and a second longitudinal channel
- the longitudinal channel is a third longitudinal channel.
- the other nozzle elements comprise at least a first nozzle element in fluid communication with the first longitudinal channel and configured to project cleaning fluid in a first direction inclined with respect to a longitudinal direction of the mop and at least a second nozzle element in fluid communication with the second longitudinal channel and configured to project cleaning fluid in a second direction inclined with respect to a longitudinal direction of the brush, and the nozzle element is a third nozzle element.
- the injection element may be capable of selectively injecting the cleaning fluid into the first longitudinal channel, the second longitudinal channel and/or the third longitudinal channel.
- the injection assembly may comprise a first pump connected to the first longitudinal channel by a first injection channel, a second pump connected to the second longitudinal channel by a second injection channel and a third pump connected to the third longitudinal channel by a third injection channel, the control unit being capable of selectively activating the first, second and third pumps.
- Such an embodiment makes it possible to independently control each of the pumps by the control unit. It is thus possible to inject cleaning fluid at different pressure levels into each of the pumps.
- the injection assembly can comprise a first dual-pressure pump capable of injecting cleaning fluid into a first injection channel according to at least a first pressure level or a second pressure level, and a pressure differential connecting the injection channel to the first longitudinal channel or to the second longitudinal channel depending on whether the fluid is injected with the first pressure level or the second pressure level in the injection channel.
- the control unit can be able to control the pressure level of the first bi-pressure pump.
- the injection assembly may further comprise a second pump capable of injecting cleaning fluid into a second injection channel connected to the third longitudinal channel and the control unit may be capable of controlling the activation of the second pump.
- Injection into the third longitudinal channel is thus controlled independently of that into the other two longitudinal channels. Only two pumps are thus used in the injection system, while allowing selective injection in the longitudinal channels.
- the first pump is a bi-pressure and bi-directional pump capable of selectively injecting cleaning fluid into the first injection channel or into a second injection channel connected to the third longitudinal channel, depending on a direction of rotation of a pump motor of the first pump.
- the control unit may be able to control the direction of rotation of the pump motor of the first pump.
- a single pump is used for injection in the three longitudinal channels, which considerably reduces the size associated with the system, while allowing selective injection.
- the first pump can be connected to a solenoid valve by a single channel, the solenoid valve being capable of transmitting the cleaning fluid injected by the first pump into the single channel, towards the first injection channel or towards a second injection channel connected to the third longitudinal channel, depending on control signals received from the control unit.
- the injection assembly may comprise a first bidirectional pump, the first pump being connected to the first longitudinal channel by a first injection channel and being connected to the second longitudinal channel by a second injection channel, the first pump being capable of injecting cleaning fluid into the first injection channel or into the second injection channel depending on a direction of rotation of a pump motor of the first pump.
- the injection system may further comprise a second pump connected to the third longitudinal channel by a third injection channel, the control unit being able to control the activation of the second pump.
- a second aspect of the invention relates to a method for controlling the injection of cleaning fluid into a wiper system for a motor vehicle, the wiper system comprising an arm, a motor able to drive the arm in rotation and a wiper blade configured to wipe a visible zone of a windshield of the motor vehicle and capable of being driven by the arm and comprising at least one longitudinal channel and at least one nozzle element in fluid communication with the at least one channel longitudinal and configured to project cleaning fluid towards at least one sensor disposed outside the zone of visibility, the nozzle element being arranged in a longitudinal end zone of the wiper blade;
- control unit the method comprising the following steps, implemented by a control unit:
- control signals generated control the injection by the cleaning fluid injection assembly at least in the longitudinal channel.
- the wiping system is able to be installed on a glazed surface of a vehicle, preferably a windshield, or a rear window.
- the wiper system comprises at least one arm 103, a wiper blade 105 attached to the arm by a fixing device 104 and configured to wipe a visibility zone of the windshield of the vehicle, and a drive device 101 of the arm 103.
- a visibility zone is a part of the windscreen arranged facing a driver or a passenger of the vehicle, and through which the passenger or the driver can observe the environment outside the vehicle.
- the drive device 101 is configured to set the wiper blade 104 in motion via the arm 103, the wiper blade 105 being in contact with the zone of visibility.
- the movement of the arm 103 is typically a reciprocating movement, preferably a circular movement.
- the drive device 101 can itself be moved by a motor around a pivot link 101 making it possible to carry out the circular movement of the wiper system 100.
- No restriction is attached to the fixing device 104 which is able to allow the mechanical fixing of the wiper blade 105 to the arm 103.
- the mechanical fixing can in particular be by tightening, by interlocking, or by any other means.
- No restriction is attached to the degrees of freedom allowed by the mechanical connection made by the fixing device 104.
- the wiping system 100 further comprises an assembly for injecting a cleaning fluid from a reservoir, not shown in the figure. , but described later, to the arm 103, then to the wiper blade 105, in order to selectively distribute the cleaning fluid in at least one longitudinal channel in fluid communication with at least one nozzle element 113 configured to project or disperse of the cleaning fluid towards an optical surface of a sensor situated outside the zone of visibility, in a direction mainly along the longitudinal direction of the wiper blade 115, as will be better understood on reading what follows.
- the nozzle element 113 can be arranged in a longitudinal end zone 120 of the wiper blade 105, in particular at the longitudinal end oriented upwards when the wiper system is mounted on a windshield. .
- longitudinal end zone is understood to mean a zone all of whose positions are closer to the longitudinal end of the wiper blade than to a central position of the wiper blade.
- the central position may in particular correspond to the position of the fixing device 104 between the wiper blade 103 and the arm 105 of the wiper system.
- the longitudinal end zone comprises all the positions twice closer, or even three times closer, to the longitudinal end than to the central position of the wiper blade.
- the nozzle element 113 may comprise an inlet to receive the cleaning liquid from the routing assembly, and at least one opening to project the cleaning fluid, for example two openings.
- the nozzle element 113 comprises two openings
- two longitudinal channels 230 can be provided in the wiper blade 103 to feed each of the openings of the nozzle element 113.
- the longitudinal channel in fluid communication with the nozzle element 113 arranged in the longitudinal end zone is a third longitudinal channel, the injection assembly furthermore being able selectively dispensing the cleaning fluid
- An upward direction may correspond to a sweeping movement from the bonnet of the vehicle towards the roof. It is thus ensured that the projection of the cleaning fluid is always in front of the wiper blade 105. It is thus made possible to improve the visibility of the driver through the visibility zone of the windscreen and to make sweeping by the more efficient 105 wiper blade.
- the nozzle element 113 is then called in the following the third nozzle element 113.
- first and second longitudinal channels as well as the second and third nozzle elements 111 and 112 are optional and correspond to a given embodiment, in which the wiper blade is capable of projecting the cleaning fluid onto the visibility area to be scanned in two different scanning directions.
- the wiper blade 105 is then called "bi-ramp".
- the wiper blade 105 may comprise, in addition to the third longitudinal channel, only one of the first and second longitudinal channels leading to at least one nozzle element, such as the first nozzle element 111 or the second nozzle element 112, capable of projecting cleaning fluid onto the glazed surface in a downward and/or upward direction.
- the wiper blade thus comprises two longitudinal channels.
- the wiper blade 105 comprises only the longitudinal channel connected to the nozzle element 113 arranged in the longitudinal end zone of the wiper blade.
- the projection of the cleaning fluid on the glazed surface can be ensured by nozzle elements located in the arm 103, and not in the wiper blade 105.
- the system 100 comprises a nozzle element in position fixed on the bonnet of the vehicle, capable of projecting cleaning fluid onto the glass surface.
- the invention is described in the context of a dual-ramp wiper blade 105 comprising two longitudinal channels for spraying fluid onto the area of visibility, and the third longitudinal channel for spraying the sensor. It will be understood that such a context is given for illustrative purposes only, the nozzle elements capable of projecting cleaning fluid onto the glass surface can be placed elsewhere than in the wiper blade 105, in the arm 103 or on the bonnet in particular .
- the nozzle elements are all arranged in the wiper blade 105.
- the brush 105 comprises at least three longitudinal channels illustrated with reference to the .
- FIG. 1 There illustrates a cross section of a wiper blade 105 of a wiper system 100 according to one embodiment of the invention.
- the section is thus along a plane XZ normal to a longitudinal direction Y of the wiper blade 105 illustrated in the .
- a wiper blade 105 of triangular section is represented on the , for illustrative purposes only. It will be understood that the wiper blade 105 may have a cross section of a different shape.
- a first longitudinal channel 210 is capable of transporting the cleaning fluid to the first nozzle elements 111 described previously, in particular in a downward sweeping direction of the wiper blade 105.
- a second longitudinal channel 220 is capable of transporting the cleaning fluid to the second nozzle elements 112 described above, in particular in an upward sweeping direction of the wiper blade 105.
- the wiper blade does not include the first and second longitudinal channels 210 and 220.
- a third longitudinal channel 230 is capable of transporting the cleaning fluid to the third nozzle element 113 described previously, when the mobile part of the wiping system, namely the arm or the brush, is in a given angular sector, defining a set of positions, as will be better understood from reading what follows.
- the third nozzle element 113 can be capable of dispersing or projecting the cleaning fluid in a mainly longitudinal direction, therefore mainly parallel to the Y-X plane, for example substantially along the Y axis.
- the third nozzle element 113 can also project obliquely with an inclination directed towards the glazed surface.
- the third channel 230 may be in a central position with respect to the other two channels 210 and 220.
- the third channel 230 may in particular be farther from the glazed surface than the other two channels 210 and 220, along the axis Z, when the wiper system 100 is installed in a vehicle.
- the directions of projection of the first and second spray elements are preferably oblique with respect to the area of visibility to be wiped extending mainly in the XY plane, so as to spray the glazed surface before it is swept by the brush wiper 105.
- wiping system 100 mounted on a windshield 310 of a motor vehicle according to one embodiment of the invention.
- the wiping system 100 may further comprise a motor 302 to drive the arm 105, a control unit 303 and a fluid injection assembly 301 in the routing assembly.
- motor 302 which includes any reversible motor making it possible to drive the mobile part of the wiping system 100 in rotation in one direction and then in another.
- the injection assembly 301 may comprise elements mounted on the arm 105 and/or on the bonnet of the vehicle.
- control unit 303 which can be a dedicated control unit of the wiper system 100, or which can be a central control unit of the vehicle, also called ECU for "Electronic Control Unit” in English, or "Body Controller”.
- the ECU 303 is capable of receiving, according to the invention, position data from the mobile part of the wiper system, comprising in particular the arm 103 and the wiper blade 105. Such position data is preferably received from regularly, at a frequency greater than ten Hertz, when the wiping system 100 is activated.
- the position data can be received from the motor 302, or alternatively from a detection device 304 capable of detecting the position of the mobile part of the wiper system. No restriction is attached to the detection device 304, which can be a camera for example.
- Location data may include:
- the injection assembly 301 is capable of selectively injecting cleaning fluid into the third longitudinal channel 230, that is to say it can or may not inject cleaning fluid into the third longitudinal channel 230, depending on control signals.
- the injection assembly 301 is able to selectively inject cleaning fluid into one or more of the longitudinal channels 210, 220 and 230.
- Embodiments of such injection assemblies 301 will be given with reference to FIGS. 4a to 4e.
- the injection assembly 301 is capable of injecting fluid into a single one, or into two of the longitudinal channels 210, 200 and 230, at a given instant (or over a time range between the receptions of data from consecutive positions ).
- the selection of one or two longitudinal channels 210, 220 and 230 is operated from control signals transmitted by the control unit 303.
- the control unit 303 determines such control signals from the position data received either from the motor 302 or from the detection device 304. In particular, the control unit 303 can determine, depending on the position data, whether the wiper blade 105 sweeps in an upward or downward direction. It then sends control signals to the injection unit 301:
- cleaning fluid is never injected both into the first longitudinal channel 210 and into the second longitudinal channel 220.
- the injection of cleaning fluid can be suspended in the first and second longitudinal channels 210 and 220.
- control unit 330 is configured to control the injection of cleaning fluid by the injection assembly 301, into the third longitudinal channel 230, when the arm 103 and/or the wiper blade 105, is in an angular sector 312, strictly included in the angular range 311 described above.
- the angular sector may in particular be less than 30°, for example less than 20°.
- the angular sector 312 is defined so that the wiper system projects cleaning fluid via the third nozzle element 113 towards an optical surface 321 of a sensor 320 of the vehicle located outside the visibility zone of the windshield. broken. No restriction is attached to the sensor 320 considered, which can be a lidar for example, nor to the position of this sensor 320. By way of example, on the , a sensor of the lidar type is represented, with a positioning centered above the windshield 310 of the vehicle.
- the angular sector 312 makes it possible to define a set of positions in which the third nozzle element 113 is opposite a part of the optical surface 321 of the sensor 320, or is approaching the optical surface.
- the angular sector 312 can advantageously depend on:
- the angular sector 312 can be defined to project cleaning fluid on only a part of the optical surface 321, for example on a central part. ;
- control signals can thus cause the injection of the product before the third nozzle element 113 is facing the optical surface 321.
- the control unit 303 can control the injection assembly 301 so as to inject cleaning fluid into the third longitudinal channel:
- the wiping system comprises a single wiping arm-brush assembly.
- it may include two such assemblies, one being located on the driver's side, the other on the passenger side. Both sets can be controlled by the control unit 303 in the manner previously described.
- only one of these assemblies comprises a jet element 113 and a longitudinal channel 230. It may for example be the arm-brush assembly on the passenger side, or as a variant, the arm-brush driver.
- the embodiments described below differ by the injection assembly 301 of cleaning fluid. Again, these embodiments are all described in the context of a dual-ramp 103 broom with three longitudinal channels. It will however be understood that the injection assembly 301 is more generally able to selectively inject cleaning fluid into the longitudinal channel 230 making it possible to clean the sensor, that is to say to inject or not to inject fluid into the longitudinal channel 230. In a complementary manner, the injection assembly 301 may also be able to selectively control the injection of cleaning fluid into one or more other longitudinal channels of the wiper blade 105, in the context of a mono- ramp or bi-ramp, in a fixed spray element on the bonnet of the vehicle or in a spray element of the arm 103.
- the injection assembly 301 includes:
- a third pump 401.3 and a third injection channel 402.3 capable of injecting cleaning fluid from the cleaning fluid reservoir to the third longitudinal channel 230.
- the pumps can be selectively activated/deactivated by control signals from control unit 303 in order to perform the control functions described with reference to .
- control unit 303 can, via control signals:
- the injection channels 402.1 to 402.3 are preferably linked to the arm 103, or even integrated under a protection of the arm 103, so as not to hinder the scanning of the mobile part of the scanning system 100. The same goes for the injection channels shown in the embodiments of the following figures.
- the junction between the longitudinal channels 210, 220 and 230, with the injection channels 402.1 to 402.3 can be made in the fixing device 104.
- the injection assembly 301 includes:
- the first pump 411.1 associated with a first injection channel 412.1 and with a second injection channel 412.2, capable of injecting cleaning fluid from a reservoir of cleaning fluid to the first longitudinal channel 210 or to the second longitudinal channel 220.
- the first pump 411.1 can be a bidirectional pump, capable of injecting cleaning fluid into the first injection channel 412.1 or into the second injection channel 412.2 depending on a direction of rotation a motor of the first pump 411.1;
- the pumps can be controlled by the control unit 303 in the manner described with reference to the .
- control unit 303 can, via control signals:
- the first bidirectional pump 412.1 is advantageously pooled between the first and second longitudinal channels 210 and 220, no simultaneous injection being necessary between these two longitudinal channels.
- the injection assembly 301 includes:
- first pump 421.1 a first injection channel 422.1 connecting the first pump 421.1 to a pressure differential valve 423, the pressure differential valve 423 being connected via a first distribution channel 424.1 to the first longitudinal channel 210, and via a second distribution channel 424.2 to the second longitudinal channel 220.
- the pressure differential valve 423 also called “Y-valve” is able to direct the fluid from the first injection channel 422.1 to the first distribution channel 424.1 or to the second distribution channel 424.2, depending on the pressure of the fluid in the first injection channel 422.1.
- the first pump 421.1 is able to vary the injection pressure of the cleaning fluid in order to select one or the other of the injection channels 422.1 and 422.2. We then speak of a bi-pressure pump. ;
- Pumps 421.1 and 421.2 can be controlled by control unit 303 in the manner described with reference to .
- control unit 303 can, via control signals:
- the number of pumps is reduced compared to the first embodiment, and the number of injection channels is reduced compared to the second embodiment, which reduces the size associated with the injection assembly 301.
- the injection assembly 301 includes:
- a single pump 431 connected by a single channel 432 to a solenoid valve 436 capable of being controlled to connect the single channel 432 to a first injection channel 435.1 or to a second injection channel 435.2, or to both injection channels 435.1 and 435.2.
- the pump 431 and the solenoid valve 436 are both controlled by the control unit 303.
- the solenoid valve 436 thus acts as a switch between the two injection channels 435.1 and 435.2 and the single channel 432, and can be controlled by control signals;
- the Y valve 433 is capable of directing the fluid from the first injection channel 435.1 to the first distribution channel 434.1 or to the second distribution channel 434.2, depending on the pressure of the fluid in the first injection channel 435.1.
- the pump 431 is thus able to vary the injection pressure of the cleaning fluid in order to select one or the other of the injection channels 422.1 and 422.2, when the solenoid valve 436 selects at least the first channel of injection 435.1.
- the pump 431 and the solenoid valve 436 can be controlled by the control unit 303 in the manner described with reference to the .
- control unit 303 can, via control signals:
- the number of pumps is reduced compared to the first embodiment, a single dual-pressure pump being provided.
- the number of injection channels is also two as in the third embodiment. However, it is also necessary to provide an additional solenoid valve, compared to the previous embodiments.
- the injection assembly 301 includes:
- the pump 441 is bidirectional in that it is capable of selectively injecting fluid into the first injection channel 442.1 or into the second injection channel 442.2, depending on the direction of rotation of the pump motor. In addition, it is capable of injecting cleaning fluid at at least two distinct pressure levels;
- the Y-valve 443 is able to direct the fluid from the first injection channel 442.1 to the first distribution channel 444.1 or to the second distribution channel 444.2, depending on the pressure of the fluid in the first injection channel 442.1.
- the pump 441 is thus able to vary the injection pressure of the cleaning fluid in order to select one or the other of the distribution channels 444.1 and 444.2, when the pump 441 rotates in a direction associated with the injection into the first injection channel 442.1.
- Pumps 441.1 and 441.2 can be controlled by control unit 303 in the manner described with reference to .
- control unit 303 can, via control signals:
- the fifth embodiment thus makes it possible to limit the number of elements of the injection assembly 301 as much as possible, while allowing selective injection into the longitudinal channels 210, 220 and 230. The size associated with the assembly injection time is thus reduced.
- control unit 303 is able to selectively control the injection of cleaning fluid into the third longitudinal channel 230 in the given angular sector, via at least one pump of the injection assembly 301.
- FIG. 1 There is a diagram illustrating the steps of a cleaning fluid injection control method implemented by a control unit 303 of a wiping system 100 according to the invention.
- the control unit 303 receives, in real time, position data from the arm 103 or from the broom 105. No restriction is attached to the frequency at which the position data is received in real time. Such a frequency is preferably greater than 10Hz, or even 100Hz.
- control unit 303 At a step 501, the control unit 303 generates control signals to selectively control the injection of cleaning fluid into the longitudinal channel 230, according to the position data received.
- the control signals are generated in the manner described previously, according to the position of the arm 103 or of the brush 105 with respect to the given angular sector.
- control unit 303 In a complementary manner, in the context of a dual-ramp wiper blade, the control unit 303 generates control signals to selectively control the injection of cleaning fluid into the first longitudinal channel 210, into the second channel longitudinal 220 and/or in the third longitudinal channel 230, depending on the position data received.
- the control signals are generated in the manner described previously, according to the sweeping direction of the wiper blade 105 and according to the position of the arm 103 or of the blade 105 with respect to the given angular sector.
- control unit 303 transmits the control signals to the injection assembly 301.
- control signals may thus consist of:
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- Cleaning In General (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
Description
Claims (12)
- Système d’essuyage (100) pour véhicule automobile comprenant :
- un bras (103) ;
- un moteur (302) apte à entraîner ledit bras en rotation ;
- un balai d’essuyage (105) configuré pour essuyer une zone de visibilité d’un pare-brise du véhicule automobile et apte à être entraîné par le bras et comprenant au moins un canal longitudinal (230), et au moins un élément gicleur (113), en communication fluidique avec l’au moins un canal longitudinal et configuré pour projeter du fluide de nettoyage vers au moins un capteur (320) disposé hors de la zone de visibilité, ledit élément gicleur étant agencé dans une zone d’extrémité longitudinale (120) du balai d’essuyage ;
- un ensemble d’injection (301) apte à injecter un fluide de nettoyage dans le canal longitudinal, ledit ensemble d’injection comprenant au moins une pompe ;
- une unité de contrôle (303) apte à contrôler en temps réel l’ensemble d’injection en fonction de données de position du bras ou du balai d’essuyage,
dans lequel lorsque l’unité de contrôle détermine que le bras ou le balai d’essuyage est dans un secteur angulaire donné (312), ledit secteur angulaire étant inférieur à une plage angulaire de balayage (311) du système d’essuyage, l’unité de contrôle est apte à contrôler l’injection par l’ensemble d’injection de fluide de nettoyage dans le canal longitudinal. - Système d’essuyage selon la revendication 1, dans lequel le secteur angulaire donné (312) est déterminé en fonction d’une géométrie du système d’essuyage (100), d’une géométrie d’une surface optique (321) du capteur (320), et d’une position relative du système d’essuyage et du capteur, lorsque le système d’essuyage est monté sur un véhicule automobile comprenant ledit capteur, de manière à ce que l’ élément gicleur projette du fluide de nettoyage en direction de la surface optique du capteur lorsque le bras ou le balai est positionné dans le secteur angulaire.
- Système d’essuyage selon la revendication 1 ou 2, dans lequel les données de position du bras (103) ou du balai (105) sont issues du moteur (302) ou sont issues d’un dispositif de détection (304).
- Système d’essuyage selon l’une des revendication 1 à 3, dans lequel le balai d’essuyage comprend au moins un autre canal longitudinal (220 ; 230) et au moins un autre élément gicleur (111 ; 112) en communication fluidique avec l’autre canal longitudinal et configuré pour projeter du fluide de nettoyage sur la zone de visibilité provenant de l’autre canal longitudinal dans une direction inclinée par rapport à une direction longitudinale du balai ;
dans lequel l’ensemble d’injection (301) est apte à injecter sélectivement le fluide de nettoyage dans le canal longitudinal et/ou dans l’autre canal longitudinal. - Système d’essuyage selon la revendication 4, dans lequel ledit au moins un autre canal longitudinal comprend au moins un premier canal longitudinal (210) et un deuxième canal longitudinal (220), et dans lequel le canal longitudinal est un troisième canal longitudinal (230),
dans lequel ledit au moins un autre élément gicleur comprend au moins un premier élément gicleur (111) en communication fluidique avec le deuxième canal longitudinal et configuré pour projeter du fluide de nettoyage dans une première direction inclinée par rapport à une direction longitudinale du balai et au moins un deuxième élément gicleur (112) en communication fluidique avec le troisième canal longitudinal et configuré pour projeter du fluide de nettoyage dans une deuxième direction inclinée par rapport à une direction longitudinale du balai, et dans lequel l’élément gicleur est un troisième élément gicleur ;
dans lequel l’élément d’injection (301) est apte à injecter sélectivement le fluide de nettoyage dans le premier canal longitudinal, le deuxième canal longitudinal et/ou le troisième canal longitudinal. - Système d’essuyage selon la revendication 5, dans lequel l’ensemble d’injection (301) comprend une première pompe (401.1) reliée au premier canal longitudinal (210) par un premier canal d’injection (402.1), une deuxième pompe (401.2) reliée au deuxième canal longitudinal (220) par un deuxième canal d’injection (402.2) et une troisième pompe (401.3) reliée au troisième canal longitudinal (230) par un troisième canal d’injection (402.3), l’unité de contrôle (303) étant apte à activer sélectivement les première, deuxième et troisième pompes.
- Système d’essuyage selon la revendication 5, dans lequel l’ensemble d’injection comprend une première pompe bi-pression (421.1 ; 431 ; 441) apte à injecter du fluide de nettoyage dans un premier canal d’injection (422.1 ; 435.1 ; 442.1) selon au moins un premier niveau de pression ou un deuxième niveau de pression, et une valve à différentiel de pression (423 ; 433 ; 443) reliant le premier canal d’injection au premier canal longitudinal (210) ou au deuxième canal longitudinal (220) selon que le fluide soit injecté avec le premier niveau ou le deuxième niveau de pression dans le premier canal d’injection ;
dans lequel l’unité de contrôle (303) est apte à contrôler le niveau de pression de la pompe-bi-pression. - Système d’essuyage selon la revendication 7, comprenant en outre une deuxième pompe (421.2) apte à injecter du fluide de nettoyage dans un deuxième canal d’injection (422.2) relié au troisième canal longitudinal (230), dans lequel l’unité de contrôle (303) est apte à contrôler l’activation de la deuxième pompe.
- Système d’essuyage selon la revendication 7, dans lequel la première pompe est une pompe bi-pression et bidirectionnelle (441) apte à injecter sélectivement du fluide de nettoyage dans le premier canal d’injection (442.1) ou dans un deuxième canal d’injection (442.2) relié au troisième canal longitudinal (230), en fonction d’un sens de rotation d’un moteur de pompe de la première pompe ;
dans lequel l’unité de contrôle (303) est apte à contrôler le sens de rotation du moteur de pompe de la première pompe. - Système d’essuyage selon la revendication 7, dans lequel la première pompe (431) est reliée à une électrovalve (436) par un canal unique (432), l’électrovalve étant apte à transmettre le fluide de nettoyage injecté par la première pompe dans le canal unique, vers le premier canal d’injection (435.1) ou vers un deuxième canal d’injection (435.2) relié au troisième canal longitudinal (230), en fonction de signaux de commande reçus de l’unité de contrôle (303).
- Système d’essuyage selon la revendication 5, dans lequel le système d’injection (301) comprend une première pompe bidirectionnelle (411.1), ladite première pompe étant reliée au premier canal longitudinal (210) par un premier canal d’injection (412.1) et étant reliée au deuxième canal longitudinal (220) par un deuxième canal d’injection (412.2), la première pompe étant apte à injecter du fluide de nettoyage dans le premier canal d’injection ou dans le deuxième canal d’injection en fonction d’un sens de rotation d’un moteur de pompe de la première pompe ;
dans lequel l’ensemble d’injection comprend en outre une deuxième pompe (411.2) reliée au troisième canal longitudinal (230) par un troisième canal d’injection (412.3), l’unité de contrôle (303) étant apte à contrôler l’activation de la deuxième pompe. - Procédé de contrôle de l’injection de fluide de nettoyage dans un système d’essuyage (100) pour véhicule automobile, le système d’essuyage comprenant un bras (103), un moteur (302) apte à entraîner ledit bras en rotation et un balai d’essuyage (105) configuré pour essuyer une zone de visibilité d’un pare-brise du véhicule automobile et apte à être entraîné par le bras et comprenant un canal longitudinal (230) et au moins un élément gicleur (113), en communication fluidique avec l’au moins un canal longitudinal et configuré pour projeter du fluide de nettoyage vers au moins un capteur (320) disposé hors de la zone de visibilité, ledit élément gicleur étant agencé dans une zone d’extrémité longitudinale (120) du balai d’essuyage ;
le procédé comprenant les étapes suivantes, mises en œuvre par une unité de contrôle (303) :
- réception (500) en temps réel de données de position du bras ou du balai d’essuyage ;
- génération (501) de signaux de contrôle, en fonction des données de position, pour contrôler en temps réel l’injection de fluide de nettoyage dans le canal longitudinal ;
- transmission (502) des signaux de contrôle à un ensemble d’injection du système d’essuyage ;
dans lequel lorsque l’unité de contrôle détermine que le bras ou le balai d’essuyage est dans un secteur angulaire donné (312), ledit secteur angulaire étant inférieur à une plage angulaire de balayage (311) du système d’essuyage, les signaux de contrôle générés contrôlent l’injection par l’ensemble d’injection de fluide de nettoyage au moins dans le canal longitudinal.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202280063481.3A CN117980197A (zh) | 2021-07-30 | 2022-07-26 | 雨刮系统以及对雨刮系统中清洁流体注入的控制 |
KR1020247006834A KR20240039027A (ko) | 2021-07-30 | 2022-07-26 | 와이핑 시스템 및 와이핑 시스템에서의 세정액 주입 제어 |
PCT/EP2022/070976 WO2023006766A1 (fr) | 2021-07-30 | 2022-07-26 | Système d'essuyage et contrôle de l'injection de fluide de nettoyage dans un système d'essuyage |
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR2108348A FR3126112A1 (fr) | 2021-07-30 | 2021-07-30 | Balai d’essuyage avec élément de projection d’un fluide de nettoyage |
FRFR2108348 | 2021-07-30 | ||
FRFR2108355 | 2021-07-30 | ||
FR2108355A FR3125782B1 (fr) | 2021-07-30 | 2021-07-30 | Balai d’essuyage pour un dispositif d’essuyage d’une surface vitrée d’un véhicule, notamment automobile |
PCT/EP2022/070976 WO2023006766A1 (fr) | 2021-07-30 | 2022-07-26 | Système d'essuyage et contrôle de l'injection de fluide de nettoyage dans un système d'essuyage |
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WO2023006766A1 true WO2023006766A1 (fr) | 2023-02-02 |
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PCT/EP2022/070976 WO2023006766A1 (fr) | 2021-07-30 | 2022-07-26 | Système d'essuyage et contrôle de l'injection de fluide de nettoyage dans un système d'essuyage |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2024023185A1 (fr) * | 2022-07-26 | 2024-02-01 | Valeo Systemes D'essuyage | Système d'essuyage avec injection par valve à différentiel de pression |
WO2024023186A1 (fr) * | 2022-07-26 | 2024-02-01 | Valeo Systemes D'essuyage | Système d'essuyage avec ensemble d'injection sélective de fluide de nettoyage dans trois canaux longitudinaux |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2991948A1 (fr) * | 2012-06-13 | 2013-12-20 | Valeo Systemes Dessuyage | Systeme d'essuyage et de lavage d'une vitre d'un vehicule |
US20160096512A1 (en) * | 2014-10-02 | 2016-04-07 | Valeo Systèmes d'Essuyage | Windscreen wiper, system and method for wiping a glazed motor vehicle surface |
WO2020126299A1 (fr) * | 2018-12-20 | 2020-06-25 | Valeo Systèmes d'Essuyage | Système d'essuyage d'une vitre arrière présentant un dispositif d'aspersion |
-
2022
- 2022-07-26 WO PCT/EP2022/070976 patent/WO2023006766A1/fr active Application Filing
- 2022-07-26 KR KR1020247006834A patent/KR20240039027A/ko unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2991948A1 (fr) * | 2012-06-13 | 2013-12-20 | Valeo Systemes Dessuyage | Systeme d'essuyage et de lavage d'une vitre d'un vehicule |
US20160096512A1 (en) * | 2014-10-02 | 2016-04-07 | Valeo Systèmes d'Essuyage | Windscreen wiper, system and method for wiping a glazed motor vehicle surface |
WO2020126299A1 (fr) * | 2018-12-20 | 2020-06-25 | Valeo Systèmes d'Essuyage | Système d'essuyage d'une vitre arrière présentant un dispositif d'aspersion |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2024023185A1 (fr) * | 2022-07-26 | 2024-02-01 | Valeo Systemes D'essuyage | Système d'essuyage avec injection par valve à différentiel de pression |
WO2024023186A1 (fr) * | 2022-07-26 | 2024-02-01 | Valeo Systemes D'essuyage | Système d'essuyage avec ensemble d'injection sélective de fluide de nettoyage dans trois canaux longitudinaux |
FR3138391A1 (fr) * | 2022-07-26 | 2024-02-02 | Valeo Systèmes D’Essuyage | Système d’essuyage avec ensemble d’injection sélective de fluide de nettoyage dans trois canaux longitudinaux |
Also Published As
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KR20240039027A (ko) | 2024-03-26 |
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