EP4232326A1 - Reinigungsvorrichtung, fahrzeug, methode zum betreiben einer reinigungsvorrichtung - Google Patents
Reinigungsvorrichtung, fahrzeug, methode zum betreiben einer reinigungsvorrichtungInfo
- Publication number
- EP4232326A1 EP4232326A1 EP21785800.0A EP21785800A EP4232326A1 EP 4232326 A1 EP4232326 A1 EP 4232326A1 EP 21785800 A EP21785800 A EP 21785800A EP 4232326 A1 EP4232326 A1 EP 4232326A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- liquid
- air
- pressure
- cleaning
- chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004140 cleaning Methods 0.000 title claims abstract description 174
- 238000000034 method Methods 0.000 title description 4
- 239000007788 liquid Substances 0.000 claims abstract description 216
- 238000006073 displacement reaction Methods 0.000 claims abstract description 22
- 238000007789 sealing Methods 0.000 claims abstract description 8
- 239000012530 fluid Substances 0.000 claims description 22
- 238000013022 venting Methods 0.000 claims description 12
- 108010060499 acharan sulfate lyase 1 Proteins 0.000 claims description 10
- 108010060486 acharan sulfate lyase 2 Proteins 0.000 claims description 10
- 238000009423 ventilation Methods 0.000 claims description 5
- 238000011161 development Methods 0.000 description 11
- 230000018109 developmental process Effects 0.000 description 11
- 230000035485 pulse pressure Effects 0.000 description 11
- 239000003795 chemical substances by application Substances 0.000 description 6
- 230000008901 benefit Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 101150092254 ASF1 gene Proteins 0.000 description 3
- 101100163357 Mus musculus Arid3a gene Proteins 0.000 description 3
- 101100436063 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) ASF2 gene Proteins 0.000 description 3
- 101100436059 Schizosaccharomyces pombe (strain 972 / ATCC 24843) cia1 gene Proteins 0.000 description 3
- 101100224604 Schizosaccharomyces pombe (strain 972 / ATCC 24843) dri1 gene Proteins 0.000 description 3
- 101100163864 Xenopus laevis asf1aa gene Proteins 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000005273 aeration Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 239000002245 particle Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S1/00—Cleaning of vehicles
- B60S1/02—Cleaning windscreens, windows or optical devices
- B60S1/46—Cleaning windscreens, windows or optical devices using liquid; Windscreen washers
- B60S1/48—Liquid supply therefor
- B60S1/52—Arrangement of nozzles; Liquid spreading means
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B5/00—Cleaning by methods involving the use of air flow or gas flow
- B08B5/02—Cleaning by the force of jets, e.g. blowing-out cavities
-
- 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
- B60S1/54—Cleaning windscreens, windows or optical devices using gas, e.g. hot air
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B3/00—Intensifiers or fluid-pressure converters, e.g. pressure exchangers; Conveying pressure from one fluid system to another, without contact between the fluids
Definitions
- the invention relates to a cleaning device according to the preamble of claim 1 .
- Cleaning devices in particular for a vehicle for providing a liquid cleaning impulse and/or a compressed air cleaning impulse, are commonly known.
- sensors for example surfaces of camera lenses or other optical sensors, are cleaned with such a cleaning device in order to ensure their function during operation of a vehicle.
- cleaning devices of this type there is a target variable conflict, typical of the species, between different performance characteristics, in particular adequate cleaning performance and/or low liquid consumption and/or low outlay on equipment.
- DE10 2015 121434 A1 shows a camera unit for capturing images of an exterior area for a motor vehicle with a cleaning device provided for cleaning the camera unit, the cleaning device comprising an actuator for driving a movable component, in particular a piston.
- the cleaning device shown in DE10 2015 121434 A1 comprises a housing, with the housing comprising two chambers, with a first chamber having a larger filling volume than a second chamber.
- the complexity of the equipment is still problematic, in particular the fact that a separate actuator in the form of a drive for conveying air and water is required for each cleaning device.
- Another problem is the still insufficient adjustability of a liquid pressure of the cleaning liquid. It would therefore be desirable to at least partially improve at least one of the problems mentioned.
- the smallest possible outlay in terms of equipment and/or a small installation space would be desirable.
- Improved adjustability of a relatively high liquid pressure would also be desirable in favor of the highest possible cleaning performance, in particular with regard to a charging pressure of the compressed air present or provided in the vehicle.
- the object of which is to specify a cleaning device in an improved manner which, in particular, reduces the outlay on equipment and/or enables a liquid pressure, in particular a relatively high pressure, to be set.
- the object relating to the cleaning device is solved by the invention in a first aspect with a cleaning device of claim 1 .
- the invention is based on a cleaning device for a vehicle for providing a liquid cleaning impulse and/or a compressed air cleaning impulse for at least one cleaning nozzle, having: a pressure cylinder with a cylinder volume, having a movable separating means which divides the cylinder volume into a first, an air volume accommodating air chamber and a second fluid chamber accommodating a quantity of fluid in a fluid-tight manner, wherein the separating means can be moved axially along a cylinder axis and bears sealingly against an inner cylinder wall of the printing cylinder.
- the cleaning device provides that the air chamber has at least one air chamber connection, designed to accept compressed air with a boost pressure for filling the air chamber, wherein when the air chamber is filled with the amount of air, the boost pressure acts on an effective air surface of the air chamber facing the air chamber
- the separating means acts to generate a displacement force, with the displacement force acting on a liquid effective area of the separating means facing the liquid chamber in order to generate a liquid pressure of the cleaning liquid accommodated in the liquid chamber
- the pressure cylinder is designed as a pressure intensifier, with the liquid effective area being smaller than the area facing it Effective area of air, so fluid pressure is greater than boost pressure.
- At least one first and at least one second chamber is provided; i.e. H. in principle, a plurality of air chambers or a plurality of liquid chambers can also be provided, in which case the pressure cylinder is also designed as a pressure intensifier, d. H. in each case with an air chamber and an associated liquid chamber, the liquid effective area is smaller than the effective air area facing it, so that the liquid pressure is greater than the boost pressure. It is also possible that overall, i. H. cumulatively for the plurality of chambers, the liquid effective area is smaller than the facing air effective area, so the liquid pressure is greater than the boost pressure.
- the pressure cylinder can thus be actuated by means of compressed air.
- the separating means has a first active air surface facing the air chamber and a second active liquid surface facing the liquid chamber, the active liquid surface being arranged opposite the active air surface in the direction of the cylinder axis and being connected, in particular rigidly, to it. the is.
- the air chamber is enlarged, the liquid chamber is reduced.
- cleaning liquid is provided in the form of the liquid cleaning pulse via a liquid chamber connection of the liquid chamber with a liquid pressure.
- the invention is based on the knowledge that a compressed air supply system and/or a compressed air source is generally available in vehicles. This is particularly the case due to other vehicle functions, for example an air spring system, a braking system or the like. Due to this availability of compressed air, it can also be used advantageously in a cleaning device both as a medium and as an energy source. When using compressed air as an energy source, there is also the advantage that several cleaning devices can be supplied by means of a compressed air source, in particular in view of prior-art solutions in which a separate actuator is provided for each cleaning device.
- the invention has surprisingly found that a liquid cleaning pulse with a relatively high liquid pressure is advantageous for effective cleaning, in particular of a sensor surface, and that a relatively small amount of liquid is sufficient.
- a compressed air cleaning impulse with a relatively low impulse pressure is sufficient, but a larger quantity of air or a longer-lasting compressed air cleaning impulse is advantageous.
- the separating agent is held in the pressure cylinder by a restoring spring in order to generate a restoring force which acts against the displacement force, in particular when the separating agent is moved when the air chamber is being filled, in particular for moving the separating agent back by the restoring force for the purpose of providing a quantity of air as a compressed air cleaning pulse and/or for refilling the liquid chamber with cleaning liquid.
- a return spring can advantageously be used as a mechanical energy store, with which the separating means can be moved back into its starting position.
- an additional conveying direction or an additional actuator for moving the separating means back, in particular for conveying the cleaning liquid can advantageously be dispensed with.
- the separating means has a first effective air surface and a second effective air surface arranged opposite the first effective air surface in the direction of the cylinder axis, and the separating means has a effective air surface opposite the first effective air surface in the direction of the cylinder axis arranged, first liquid active surface has, and the separating means has a second effective air surface arranged opposite the second effective air surface in the direction of the cylinder axis, the first effective air surface facing a first air chamber, the second effective air surface facing a second air chamber, the first fluid - active surface faces a first liquid chamber and the second liquid active surface faces a second liquid chamber.
- the separating means is preferably designed as a multiple stamp, in particular as a symmetrical multiple stamp.
- the multiple ram has an air ram and liquid rams which are axially spaced apart in both directions in the direction of the cylinder axis and are rigidly connected by means of a ram shank, in particular a first liquid ram and a second liquid ram.
- a plurality of cleaning nozzles and/or a plurality of nozzle connections can be supplied via a first and a second cleaning line.
- the pressure cylinder can have at least one restoring spring, in particular two, preferably equally dimensioned and symmetrically arranged restoring springs.
- the return spring is preferably arranged in the respective air chamber.
- a switching valve is provided which is designed to establish a pneumatic connection between a module compressed air connection and the air chamber connection in an aeration position, and in particular to establish a pneumatic connection between the air chamber connection and a compressed air nozzle line in a venting position.
- the switching valve is preferably designed as a 3/2-way valve, particularly preferably as a 3/2-way solenoid valve.
- the switching valve can be designed as a valve that opens continuously, in particular as a valve that can be actuated continuously via a pulse-width-modulated signal, in order to enable the selective setting of a charging pressure.
- the invention is further developed by a bypass valve assembly which is designed to establish a pneumatic connection between the Module compressed air connection and the compressed air nozzle line past the switching valve in an open position for providing a bypass compressed air flow.
- the bypass valve arrangement has in particular a compressed air pulse check valve and/or a 2/2-way valve.
- the 2/2-way valve is designed in particular as a 2/2-way solenoid valve.
- the pressure cylinder and/or the separating means are designed in such a way that the air chamber has a dead volume that is not passed by the separating means, with the air chamber connection being arranged in the area of the dead volume.
- the dead volume has an axial extent of less than 5 mm, preferably less than 2 mm.
- a dead volume advantageously ensures that an effective air surface of the can does not rest directly on other parts of the pressure cylinder. This ensures that the compressed air flowing in via the air chamber connection can always come into contact with the effective air surface and thus in particular the charging pressure can act on the effective air surface for the purpose of actuating the release agent.
- the invention is further developed in that the separating means is designed as a multiple plunger, with at least one air plunger being connected to at least one liquid plunger via a plunger shaft.
- the liquid stamp has at least one liquid effective surface.
- the air stamp has at least one effective air surface.
- a boost pressure is less than 10 bar, preferably between 3 and 7 bar, particularly preferably 5 bar.
- a liquid stamp diameter is 15 mm.
- an air stamp diameter is 20 mm.
- a boost pressure setting means is provided, in particular a pressure control valve and/or a proportional valve, with the boost pressure setting means being arranged in particular in the compressed air connection line.
- a boost pressure can advantageously be set, for example permanently constant or selectively variable, by means of a boost pressure setting means.
- the cleaning device and/or the boost pressure setting means can be designed to set the boost pressure as a function of a cleaning test signal. In this way, for example, a higher boost pressure can advantageously be set in the case of larger and/or more stubborn dirt, which results in particular in a higher pulse pressure and/or higher fluid pressure.
- the invention is further developed by at least one cleaning nozzle, which is arranged and designed to apply a liquid cleaning pulse and/or a compressed air cleaning pulse to at least one sensor surface.
- the invention leads to a vehicle, in particular a passenger car or a commercial vehicle or a trailer, having at least one cleaning device according to the first aspect of the invention.
- a vehicle in particular a passenger car or a commercial vehicle or a trailer, having at least one cleaning device according to the first aspect of the invention.
- advantages of the cleaning device according to the first aspect are advantageously used.
- FIG. 1 shows a first embodiment of a cleaning device according to the concept of the invention
- FIG. 3 shows a schematic representation of a vehicle with a cleaning device according to the concept of the invention.
- the cleaning device 100 is designed to provide compressed air DL in the form of a compressed air cleaning pulse DRI at a nozzle compressed air connection 104 and to provide cleaning liquid F in the form of a liquid cleaning pulse FRI at a nozzle liquid connection 102.
- the cleaning device 100 has a modular compressed air connection 272 on, the is formed to accept compressed air DL from a compressed air source 600, in particular a compressor 602 and/or a pressure accumulator 604 of a compressed air supply system 606.
- the module compressed air connection 272 is pneumatically connected via a compressed air connection line 273 to a first connection 270.1 of a switching valve 270.
- the switching valve 270 is designed as a 3/2-way solenoid valve.
- the cleaning device 100 has a module liquid connection 618, which is designed to accept cleaning liquid F from a liquid source 400.
- the cleaning device 100 has a pressure cylinder 220 which can be pressurized by means of compressed air DL at an air chamber connection 223 .
- the pressure cylinder 220 has a separating means 226 embodied as a multiple stamp 229, which can be moved axially along a cylinder axis AZ and variably divides a cylinder volume VZ of the pressure cylinder 220 into at least one air chamber 222 and one liquid chamber 224.
- the pressure cylinder 220 has an air chamber connection 223 , via which the air chamber 222 can be pressurized with compressed air DL in order to fill the air chamber 222 .
- the compressed air DL provided at the air chamber connection 223 has, in particular, a charging pressure PL.
- the boost pressure PL is set in particular via the pressure source 600 or optionally via a suitable pneumatic boost pressure setting means 360, in particular a pressure control valve 362 or a proportional valve 364.
- the cleaning device 101 can have such a boost pressure setting means 360, arranged in particular in the compressed air connection line 273.
- the boost pressure PL of the compressed air DL entering the air chamber 222 acts on an effective air surface ASL of the separating means 226 facing the air chamber 222.
- the on the boost pressure PL acting on the effective air surface ASL results in a displacement force FV acting on the separating means 226 .
- the separating means 226 is held in the pressure cylinder 220 by a restoring spring 228, as a result of which the restoring spring 228 generates a restoring force FR when the separating means 226 is deflected, which is directed in the opposite direction to the displacement force FV.
- the restoring force FR depends in particular on a spring constant K of the restoring spring 228.
- the air chamber connection 223 is connected pneumatically via an air chamber line 227 to a second connection 270.2 of the switching valve 270.
- the greater the spring constant K the greater the restoring force FR.
- the greater the restoring force FR the greater the pulse pressure PI.
- the fluid pressure PF is reduced because the restoring force FR acts against the displacement force FV.
- the separating means 226 is accommodated in the pressure cylinder 220 so that it can move axially with a stroke H.
- a dead volume VT can be provided in the air chamber 222, which is not passed by the separating means 226, in particular by the air piston 231. This means that the separating means 226 has already reached its axial end position before it reaches an end wall of the pressure cylinder 220 .
- a dead volume VT advantageously ensures that the compressed air entering the air chamber 222 via the air chamber connection 223 comes into contact with the entire effective air area ASL and thus the boost pressure PL can act on the entire effective air area ASL.
- the air chamber connection 223 is advantageously arranged in the area of the dead volume VT, in particular in the front wall of the pressure cylinder 220 and/or in the air chamber segment 220.1 of the pressure cylinder 220 on the shell side, specifically there in the area of the dead volume VT.
- the pressure cylinder 220 has a liquid chamber connection 225, via which the liquid chamber 224 is connected to a liquid nozzle line 626 in a fluid-carrying manner.
- the pressure chamber connection 225 is connected to the liquid nozzle line 626 in a fluid-conducting manner at a cylinder connection point 619 .
- the separating means 226 is in the form of a multiple ram 229 with an air ram 231 and a liquid ram 233 which are rigidly connected to one another via a ram shank 235 .
- the air piston 231 is arranged in an air chamber section 220.1 of the pressure cylinder 220 and has an effective air surface ASL which faces the air chamber 224.
- the liquid plunger 233 is arranged in a liquid chamber segment 220.2 of the pressure cylinder 220 and has a liquid effective surface ASF which faces the liquid chamber 224.
- the air chamber section 220.1 and the liquid chamber segment 220.2 each have an inner diameter that corresponds to the outer diameter or the effective surface ASL, ASF of the respective plunger 231, 233 to produce an axially movable but fluid-tight contact.
- the separating means 226 can be moved axially within the cylinder volume VZ of the pressure cylinder 220 along the cylinder axis AZ.
- the air ram 231 and the liquid ram 233 are designed so that they each rest against an inner cylinder wall 221 of the pressure cylinder 220 in a pressure-tight manner.
- the separating means 226 can have one or more sealing rings, in particular made of plastic and/or rubber, for better sealing of the air chamber 222 from the liquid chamber 224 .
- the air ram 231 has an air ram sealing ring arranged in the circumferential direction 237, and the liquid plunger 233 has a liquid plunger sealing ring 239.
- the separating means 226 divides the cylinder volume VZ in a variable manner into an air chamber 222 and a liquid chamber 224. Due to the rigidly connected and differently sized effective surfaces ASL, ASF, an effective air chamber volume VLO is that with a maximum deflected stroke H of the separating means 226 in the air chamber 222 is available, greater than an effective liquid chamber volume VFO, which is available in the liquid chamber 224 when the stroke H of the separating means 226 is maximally deflected in the opposite direction.
- the multiple plunger 229 is held by a restoring spring 228 in the cylinder volume VZ of the pressure cylinder 220, so that a restoring force FR is generated in the event of a deflection, caused in particular by the loading pressure PL being applied to the air chamber connection 223.
- the air chamber 222 can on the one hand be charged with compressed air DL with a boost pressure PL to generate a displacement force FV acting on the effective air surface ASL of the separating means 226.
- compressed air DL with a pulse pressure PI can be emitted via the air chamber connection 223 for the purpose of providing a compressed air cleaning pulse DRI by the separating means 226 moving back, in particular via the restoring force FR.
- the pulse pressure PI results in particular from the restoring force FR divided by the effective air area ASL.
- the fluid pressure PF results in particular from the difference between the displacement force FV and the restoring force FR, divided by the fluid effective area ASF.
- the liquid chamber 224 can suck in cleaning liquid F via a liquid-chamber connection 225 and deliver it at a liquid pressure PF in order to provide a liquid cleaning pulse FRI.
- the fluid pressure PF is dependent on the boost pressure PL, but is not the entire charge pressure PL at the liquid chamber connection 225 can be used as liquid pressure PF, since overcoming the restoring force FR causes losses.
- the pressure cylinder 220 functions as a pressure intensifier.
- the relationship is essentially as follows—in particular if, for reasons of simplification, a pressure loss caused by a return spring 228 is not taken into account:
- the nozzle compressed air connection 104 is connected pneumatically via the compressed air nozzle line 278 to a third connection 270.3 of the switching valve 270.
- the switching valve 270 has, in particular, a relatively large nominal width in order to advantageously transmit the compressed air cleaning pulse DRI without or with as little as possible low pressure loss to the compressed air nozzle line 278.
- the switching valve 270 has a nominal diameter that is greater than or equal to the diameter of the compressed air nozzle line 278 and/or the air chamber line 227.
- the comparatively large nominal width of a switching valve 270 is in a range above 1.2 mm, in particular in a range from 1.0 mm to 3.0 mm;
- nominal widths of such a switching valve or a similarly designed switching valve, such as that of the switching valve 270 have proven to be advantageous in order to pass on an air pulse from the valve piston of the switching valve 270 as well as possible.
- such nominal widths have proven to be advantageous for cleaning a camera sensor, but are not limited to this.
- a suction pressure check valve 350 is arranged in the liquid nozzle line 626 between the cylinder connection point 619 and the nozzle liquid connection 102 .
- a liquid pulse check valve 352 is arranged in the liquid nozzle line 626 between the cylinder connection point 619 and the module liquid connection 618 .
- the liquid pulse check valve 352 prevents cleaning liquid F from escaping in the direction of the module liquid connection 618 when the liquid cleaning pulse FRI is provided.
- the first connection 270.1 is pneumatically connected to the second connection 270.2 and the third connection 270.3 is blocked.
- an air pressure present at the module compressed air connection 272, in particular a boost pressure PL is forwarded to the air chamber connection 223, which results in an expansion of the air chamber 222 and the provision of a liquid cleaning pulse FRI at the nozzle liquid connection 102. Consequently, the liquid cleaning pulse FRI is applied to a sensor surface 300 via the cleaning nozzle 320.
- a venting position 270B of the switching valve 270--as shown here---the second connection 270.2 is pneumatically connected to the third connection 270.3 and the first connection 270.1 is blocked.
- This venting position 270B results in venting of the air chamber connection 223, as a result of which the separating means 226 moves back, in particular as a result of the restoring force FR, and both the air chamber 222 is reduced and the liquid chamber 224 is enlarged.
- a negative pressure is created at the liquid chamber connection 225. Due to the suction pressure check valve 350, the negative pressure acts only on the module liquid connection 618 (and not on the nozzle liquid connection 102), whereby new cleaning liquid F from the liquid source 400 into the Liquid chamber 224 is sucked, in particular without a pump or the like conveying device for the cleaning liquid F being required.
- the cleaning process is thus completed and can be repeated if necessary, in particular by switching the switching valve 270 back into the ventilation position 270A.
- the cleaning device 100 can optionally have a bypass valve arrangement 330 as shown here.
- the bypass valve arrangement 330 has, in particular, a compressed air pulse check valve 354 and a 2/2-way valve 332 .
- the 2/2-way valve 332 is designed in particular as a 2/2-way solenoid valve 333 .
- the 2/2-way valve 332 is pneumatically connected to the compressed air connection line 273 via a first connection 332.1 and to a bypass connection point 621 of the compressed air nozzle line 278 via a second connection 332.2 and a bypass line 623 .
- the compressed air pulse check valve 354 is presently arranged between the third connection 270.3 of the switching valve 270 and the bypass connection point 621 in the compressed air nozzle line 278.
- the compressed air pulse check valve 354 is designed in particular to open in the flow direction of the compressed air cleaning pulse DRI and/or the bypass compressed air flow BDS and to close in the opposite direction.
- the first connection 332.1 is pneumatically separated from the second connection 332.2.
- the bypass valve arrangement 330 By switching the bypass valve arrangement 330 , the nozzle compressed air connection 104 can be supplied directly with compressed air DL from the module compressed air connection 272 , bypassing the switching valve 270 . In the present case, this is done by switching the 2/2-way valve 332 into an open position 332B, in which the first connection 332.1 is pneumatically connected to the second connection 332.2.
- the compressed air DL present at the module compressed air connection 272 can be forwarded directly via the bypass connection point 621 and the compressed air nozzle line 278 to provide a bypass compressed air flow BDS at the nozzle compressed air connection 104.
- the bypass valve arrangement 330 thus advantageously allows the sensor surface 300 to be acted upon Compressed air DL, in particular with a bypass compressed air flow BDS, allows without actuating the pressure cylinder 220.
- the compressed air pulse check valve 354 ensures in particular that - when the 2/2-way valve 332 is in the open position 332B and the switching valve is in the venting position 270B - the compressed air DL does not flow in the direction of the switching valve 270 and thus into the air chamber 222 of the pressure cylinder 220 can flow.
- the cleaning device 100 can have a boost pressure setting means 360, in particular a pressure control valve 362 and/or a proportional valve 364, in order to set a boost pressure PL.
- boost pressure adjustment means 360 can advantageously be arranged in the compressed air connection line 273 .
- switching valve 270 can be designed as a continuously opening valve, in particular as a valve that can be continuously actuated via a pulse-width-modulated signal, in order to enable the setting of a charging pressure.
- FIG. 2 shows another embodiment of a cleaning device 100' according to the concept of the invention.
- the cleaning device 100' has a pressure cylinder 220' which, in contrast to the embodiment shown in FIG. 1, has in particular a first air chamber 222.1 and a second air chamber 222.2, as well as a first liquid chamber 224.1 and a second liquid chamber 224.2. i.e.
- the second embodiment provides that a plurality of air chambers or a plurality of liquid chambers are provided, the pressure cylinder then also being designed as a pressure intensifier, i. H. in each case with an air chamber and an associated liquid chamber, the liquid effective area is smaller than the effective air area facing it, so that the liquid pressure is greater than the boost pressure.
- the air chamber 222 has at least one air chamber connection 223, designed to accept compressed air DL with a boost pressure PL for filling the air chamber 222, wherein when the Air chamber 222 with the air quantity ML the charge pressure PL acts on an effective air surface ASL of the separating means 226 facing the air chamber 222 to generate a displacement force FV, wherein the displacement force FV acts on a effective liquid surface ASF of the separating means 226 facing the liquid chamber 224 to generate a liquid pressure PF of the cleaning liquid F received in the liquid chamber 224, and the pressure cylinder 220 is designed as a pressure intensifier, the liquid effective area ASF being smaller than the facing air effective area ASL, so that the liquid pressure PF is greater than the boost pressure PL.
- the pressure cylinder 220' correspondingly has an air chamber segment 220.1 to form a first air chamber 222.1 and a second air chamber 222.2 separated from it in a fluid-tight manner by means of the air piston 231.
- the pressure cylinder 220' also has a liquid chamber segment 220.2 to form a first liquid chamber 224.1, and a further liquid chamber segment 220.3 to form a second liquid chamber 224.2.
- the separating means 226 is constructed accordingly as a symmetrical multiple stamp 229' with an air stamp 231 arranged in the middle, and liquid stamps 233, spaced axially in both directions in the direction of the cylinder axis AZ and rigidly connected by means of a stamp shaft 235, namely a first liquid stamp 233.1 and a second liquid stamp 233.2.
- the first switching valve 270 is in a venting position 270A and the second switching valve 470 is in a venting position 470B. Consequently, the first air chamber 222.1 is subjected to a first boost pressure PL1, as a result of which a first displacement FV1 acts on the separating means 226' and the first air chamber 222.1 is enlarged and the second air chamber 222.2 and the second liquid chamber 224.2 are thus reduced. Consequently, at the second air chamber connection 223.2 a second compressed air cleaning pulse DRI2 is provided with a second pulse pressure PI2. At the same time, a second liquid cleaning pulse FRI2 with a second liquid pressure PF2 is provided at the second liquid connection 225.2 of the second liquid chamber 224.2.
- the second fluid pressure PF2 is increased according to the concept of the pressure intensifier explained in FIG. 1 and here according to the area ratio of the first air effective area ASL1 to the second fluid effective area ASF2.
- the first switching valve 270 is in a venting position 270B and the second switching valve 470 is in a venting position 470A.
- no first charge pressure PL1 now acts on the first air chamber connection 223.1, but rather a second charge pressure P2 on the second air chamber connection 223.2.
- a second displacement force FV2 acts on the second effective air surface ASL2, which leads to an axial movement of the separating means 226′—which runs in the opposite direction compared to the first step.
- the second air chamber 222.2 and also the second liquid chamber 224.2 for sucking in new cleaning liquid F are correspondingly enlarged.
- the first air chamber 222.1 and the first liquid chamber 224.1 are reduced.
- a first compressed air cleaning pulse DRI1 with a first pulse pressure PI1 is provided at the first air chamber connection 223.1.
- a first liquid cleaning pulse FRI1 with a first liquid pressure PF1 is provided at the first liquid connection 225.1 of the first liquid chamber 224.1.
- the first liquid pressure PF1 is increased according to the area ratio of the second air effective area ASL2 to the first liquid effective area ASF1.
- the pressure cylinder 220 ′ can be designed without a return spring 228 .
- the second pulse pressure PI2- also corresponds to the first boost pressure PL1 due to the same effective air surfaces ASL1, ASL2.
- the pulse pressure PH , PI2 of one friction cleaning line 100.1, 100.2 can be set by the charging pressure PL1, PL2 of the respective other cleaning line 100.1, 100.2.
- the pressure cylinder 220' can have at least one restoring spring 228, in particular a first restoring spring 228.1 and a second restoring spring 228.2.
- both restoring springs 228.1, 228.2 can be designed identically, in particular dimensioned, so that with a symmetrical separating means 226' and a symmetrical pressure cylinder 222', a rest position of the separating means 226' results in the axial center of the pressure cylinder 220'. A deflection of the separating means 226' thus results in a first restoring force FR1, which acts against the second displacement force FV2, or a second restoring force FR2, which acts against the first displacement force FV1.
- the cleaning device 100' thus advantageously provides a first cleaning line 100.1 and a second cleaning line 100.2 with only one pressure cylinder 220'.
- the first cleaning line 100.1 can essentially be controlled via a first switching valve 270 and the second cleaning line 100.2 via a second switching valve 470.
- the other components already shown and explained in FIG. 1 are assigned to the respective cleaning line 100.1, 100.2 in FIG. 2 for each of the two cleaning lines 100.1, 100.2 with the same reference numbers as in FIG. 1, but via a corresponding number 1 or 2 , shown.
- One or both cleaning lines 100.1, 100.2 can have a bypass valve arrangement 330.1, 330.2, analogous to that shown in FIG.
- One or both cleaning lines 100.1, 100.2 can have a boost pressure adjustment means 360.1, 360.2, analogous to that shown in FIG.
- the compressed air cleaning pulses DRI1, DRI2 are provided at a first and second compressed air nozzle connection 104.1, 104.2 and the liquid cleaning pulses FRI1, FRI2 at a first and second liquid nozzle connection 102.1, 102.2.
- These compressed air and liquid nozzle connections 102.1, 102.2, 104.1, 104.2 can be assigned to one or more cleaning nozzles 320 (not shown here). In particular, they can be associated with a cleaning nozzle 320 for cleaning a larger sensor surface 300 .
- Fig. 3 shows a schematic representation of a vehicle 1000, in particular a car 1002 or commercial vehicle 1004 or a trailer 1006 - present in the form of an autonomous or semi-autonomous vehicle - having a cleaning device 100, 100 'for at least one cleaning nozzle 320 for cleaning a sensor surface 300 of a sensor 301 embodied as an optical sensor, for example as a camera.
- a cleaning device 100 100 'for at least one cleaning nozzle 320 for cleaning a sensor surface 300 of a sensor 301 embodied as an optical sensor, for example as a camera.
- the cleaning device 100, 100' can have a module control unit 210 which is connected to a vehicle control unit 1020 via a vehicle control line 1024 in a signal-carrying manner.
- the vehicle control line 1024 is designed in particular as a vehicle bus 1026, in particular a CAN bus.
- cleaning device 100, 100' in particular the at least one switching valve 270, 470 and/or the at least one bypass valve 330, 330.1, 330.2 and/or the at least one boost pressure adjustment device 360, 360.1, 360.2, can carry signals with a vehicle control unit 1020 of the vehicle 1000 to control the cleaning device 100, 100'.
- one or more cleaning devices 100, 100′ can be arranged centrally in an area of vehicle 1000, in particular next to one another or as a central module. Alternatively or additionally, a plurality of cleaning devices 100, 100′ can be arranged decentrally in the vehicle 1000, in particular in the vicinity of the cleaning nozzle 320 to be supplied.
- Sensor 301 is connected via a sensor line 306 to vehicle control unit 1020 for transmitting sensor signals 305 .
- a cleaning test signal 307 for determining whether the sensor surface 300 has been cleaned or whether a liquid cleaning pulse FRI has been emitted can be transmitted to the vehicle control unit 1020 via the sensor line 306 .
- a cleaning check signal 307 can be generated in particular using image processing means, for example by determining an improvement in the signal quality of the sensor signal or of liquid particles in the camera image.
- a sensor line 306′ can be provided between the sensor 301 and the module control unit 210, in particular for transmitting the cleaning test signal 307, as an alternative or in addition.
- the cleaning nozzle 320 is designed to act on the sensor surface 300 with a liquid cleaning pulse FRI and/or a compressed air cleaning pulse and/or a bypass compressed air flow.
- the cleaning nozzle 320 is connected in a fluid-carrying manner to the cleaning device 100 in particular via a nozzle liquid connection 102 and/or a nozzle compressed air connection 104 and/or a nozzle combination connection 106 .
- the cleaning nozzle 320 can carry fluid via a nozzle connection line 108 with the nozzle liquid connection 102 and/or the nozzle compressed air connection 104 and/or the nozzle Combination port 106 can be connected.
- VL1 first air chamber volume
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Water Supply & Treatment (AREA)
- Cleaning In General (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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DE102020128100.5A DE102020128100A1 (de) | 2020-10-26 | 2020-10-26 | Reinigungsvorrichtung, Fahrzeug, Methode zum Betreiben einer Reinigungsvorrichtung |
PCT/EP2021/076442 WO2022089855A1 (de) | 2020-10-26 | 2021-09-27 | Reinigungsvorrichtung, fahrzeug, methode zum betreiben einer reinigungsvorrichtung |
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EP4232326A1 true EP4232326A1 (de) | 2023-08-30 |
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Application Number | Title | Priority Date | Filing Date |
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EP21785800.0A Pending EP4232326A1 (de) | 2020-10-26 | 2021-09-27 | Reinigungsvorrichtung, fahrzeug, methode zum betreiben einer reinigungsvorrichtung |
Country Status (5)
Country | Link |
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US (1) | US20230278529A1 (de) |
EP (1) | EP4232326A1 (de) |
CN (1) | CN116249595A (de) |
DE (1) | DE102020128100A1 (de) |
WO (1) | WO2022089855A1 (de) |
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DE102021122320A1 (de) | 2021-08-30 | 2023-03-02 | Zf Cv Systems Global Gmbh | Sensorreinigungssystem, Fahrzeug |
DE102022118869A1 (de) | 2022-07-27 | 2024-02-01 | Eto Magnetic Gmbh | Sensorrreinigungsvorrichtung |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2001115953A (ja) * | 1999-10-19 | 2001-04-27 | Excel Engineering:Kk | 洗浄液噴射装置 |
DE102009030514B4 (de) * | 2009-06-04 | 2015-09-10 | Scanwill Fluid Power Aps | Ausblaswerkzeug |
WO2017080614A1 (en) | 2015-11-13 | 2017-05-18 | Fico Transpar, S.A. | System for cleaning a vehicle-mounted sensor |
DE102015121434A1 (de) * | 2015-12-09 | 2017-06-14 | Huf Hülsbeck & Fürst Gmbh & Co. Kg | Kameraeinheit mit einer Reinigungsvorrichtung |
US10518754B2 (en) * | 2017-04-07 | 2019-12-31 | Uatc, Llc | Autonomous vehicle sensor cleaning system |
DE102019111469A1 (de) | 2019-05-03 | 2020-11-05 | Wabco Gmbh | Reinigungsvorrichtung zum Beaufschlagen einer Oberfläche mit einem Mediumspuls nach dem Venturi-Prinzip, Druckluftsystem, Reinigungsverfahren, Steuerungssystem und Fahrzeug |
-
2020
- 2020-10-26 DE DE102020128100.5A patent/DE102020128100A1/de active Pending
-
2021
- 2021-09-27 WO PCT/EP2021/076442 patent/WO2022089855A1/de unknown
- 2021-09-27 EP EP21785800.0A patent/EP4232326A1/de active Pending
- 2021-09-27 CN CN202180067091.9A patent/CN116249595A/zh active Pending
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2023
- 2023-04-21 US US18/305,104 patent/US20230278529A1/en active Pending
Also Published As
Publication number | Publication date |
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WO2022089855A1 (de) | 2022-05-05 |
CN116249595A (zh) | 2023-06-09 |
US20230278529A1 (en) | 2023-09-07 |
DE102020128100A1 (de) | 2022-04-28 |
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