Improved wheel cleaning system

Abstract

A wheel washer (200) comprising a washer (210, 220) configured to provide spray of a washing fluid through a nozzle (212, 222) onto a wheel (110) to be washed, wherein the wheel washer (200) is characterized in that the washer (210, 220) is further configured to provide the spray to a centre bore area (120) at an adapted pressure and provide the spray outside the centre bore area (120) at least partially at a nominal pressure, wherein the adapted pressure is less than 50% of the nominal pressure.

Description

[0001] IMPROVED WHEEL CLEANING SYSTEM

[0002] TECHNICAL FIELD

[0003] The teachings herein relate to wheel washers, and in particular to automated wheel washers.

[0004] BACKGROUND

[0005] Figure 1 shows two schematic views of a wheel 110, one front view and one side view, which is discussed in order to define a terminology. As would be understood, wheels exist in many different types, and there are also many terms referring to the same components. There are also many different variations which all do not share the same number (or placement) of components as discussed herein, one example being wheels that are attached through the centre bore, and another example being the arrangement of spokes.

[0006] For the purpose of the disclosure herein the wheel 110, as is known, has a rim 111 on which a tire 112 is mounted (or to be mounted) . Rims 111 are available in many different sizes, where a rim of 14, 15, 16 or 17 inches are common. It should be noted that many other sizes are also common for example 18, 19, 20 inches and so on. Similarly tires 112 are also available in many different sizes, both as regards the height and the width of the tire 112. The wheel 110, generally, has a plurality of spokes 113 connecting the rim 111 to a centre disc 114. The spokes 113 may be separate components attached to the rim, they may be part of the rim 111, or they may be part or the centre disc 114. The centre disc, the spokes and the rim are commonly referred to simply as a rim. The centre disc 114, generally, has a plurality of lug holes 115 through which lug bolts (not shown) can be used to attach the wheel 110 to a car ( or other vehicle , not shown) . More importantly for the purpose of the disclosure herein, the centre disc 114 has a centre bore which is covered with a centre cap 120 . As the centre cap covers the centre bore , they will be commonly referenced 120 hereafter .

[0007] The wheel 110 is also referred to as having a car side A and a curb side B, being the side of the wheel that the car and the curb will be at , respectively, when the wheel is mounted . The centre cap 120 is most commonly mounted to cover the centre bore from the curb side B of the wheel 110 .

[0008] The wheel 110 ( including the rim 111 , the centre disc 114 and the spokes 113 ) are made of sturdy materials such as carbon, aluminium alloys or steel ( combinations exist ) , while the centre cap is sometimes ( often) made of sensitive materials , such as plastic . The centre cap is also , often, arranged with some intricate design showing of for example a brand or other logo which adds immensely to the overall impression of the wheel , and also helps identi fy the type of wheel 110 .

[0009] The centre cap 120 is most commonly attached to the centre disc, by having flanges (not shown but commonly known to be a part of the centre cap 120 ) that are pushed into the centre bore ( or flanges at the opening of the centre bore ) that when inserted expand and then hold the centre cap 120 in place . As is noted above , there are many nomenclatures used for wheels and there are also many di f ferent wheel types , but for the purpose of the teachings herein, it is important to note the centre bore and the centre cap as defined above .

[0010] There is a problem during wheel washing in that the centre cap caused to become lose . When the centre cap is damaged, it has a signi ficant ef fect on the overall impression of the wheel . When the cap becomes lose it can become further damaged, it can get lost , and it can cause time to be wasted looking for the centre cap 120 in order to reinsert it . This is a problem for manual wheel washers (where the wheels are loaded and of floaded manually) and indeed for automated wheel washers (where the wheels are loaded and of floaded automated) as it requires manual labour .

[0011] There is thus a need for an improved wheel cleaning system, where time is utili zed better .

[0012] SUMMARY

[0013] The teachings herein provide for a solution through a wheel washer comprising a washer configured to provide spray of a washing fluid through a noz zle onto a wheel to be washed, wherein the wheel washer is characteri zed in that the washer is further configured to provide the spray to a centre bore area ( 120 ) at an adapted pressure and provide the spray outside the centre bore area ( 120 ) at least partially at a nominal pressure , wherein the adapted pressure is less than 50% of the nominal pressure .

[0014] All embodiments herein provide a washing of a wheel where a centre portion, such as the area of the centre bore , is provided with washing fluids at a reduced pressure through peripheral spray compared to other portions which are washed with direct spray . The pressure is signi ficantly reduced, so that the pressure of the peripheral spray is less than 50% , 30% , 25% , 15% or even lower than 10% of the pressure of the direct spray . When washing with granules in the washing fluid, the granules have a mass and due to the inertia of the granules , it will take some time to get the granules moving along with the water i f the pressure drops too much . How much of course depends on the composition of the washing fluid, such as surface tension and si ze and mass of the granules . In such embodiments the pressure of the peripheral spray is less than 50% , 30% , or 25% , but higher than 15% of the pressure of the direct spray .

[0015] The area of the centre bore 120 is defined as the area of the centre bore or an area slightly larger ( 5 or 10% ) larger than the centre bore , co-centred with the centre bore 120 . The peripheral pressure referred to herein is also referred to as an adapted pressure compared to the usual (nominal ) pressure that the rest of the wheel is to be washed with . I f the pressure is adapted in steps , gradually or linearly, the nominal pressure indicates the maximum pressure .

[0016] The teachings herein have the benefit of reducing manual labour in finding centre caps . The teachings herein also have the benefit of protecting the centre caps from being scratched or otherwise damaged . And the teachings herein also have the benefit of preventing or reducing the risk of the centre caps or parts thereof clogging up any recirculating system or pumps .

[0017] It should be noted that even though the teachings herein are focused on cleaning wheels , the teachings also can be employed to clean rims and by wheels , as used herein, a rim is also seen to be a wheel .

[0018] Further embodiments and benefits of the present teachings will be apparent from the following description .

[0019] BRIEF DESCRIPTION OF THE FIGURES

[0020] The solution will be disclosed with simultaneous reference to

[0021] Figure 1 showing two views of a wheel , Figure 2 showing a view of a wheel washer,

[0022] Figure 3 showing a view of a wheel washer arranged to provide a wheel wash at an adapted pressure according to some examples of embodiments of the teachings herein,

[0023] Figure 4 showing a view of a wheel washer arranged to provide a wheel wash at an adapted pressure according to some examples of embodiments of the teachings herein,

[0024] Figure 5 showing a view of a wheel washer arranged to provide a wheel wash at an adapted pressure according to some examples of embodiments of the teachings herein, and

[0025] Figure 6 showing a view of a wheel washer arranged to provide a wheel wash at an adapted pressure according to some examples of embodiments of the teachings herein .

[0026] DETAILED DESCRIPTION

[0027] The teachings herein will be disclosed with simultaneous reference to all the figures .

[0028] Figure 2 shows a view of a wheel washer 200 ( also referred to as a wheel cleaning station when part of a larger system) according to the teachings herein . The wheel washer 200 comprises a structure 230 , often part of or arranged to be mounted in a housing as the wheel 110 is to be washed by spraying washing fluids the washing is messy . The washing fluids commonly comprises water mixed with and carrying plastic granules ( a so-called slurry) and / or cleaning detergents . The placement in a housing therefore puts limitations on the si ze available for the wheel washer 200 . The wheel washer 200 further comprises a first washer 210 . In some embodiments the first washer is for washing the curb-side B of the wheel 110 . In some embodiments the first washer 210 is also for washing the car-side A of the wheel 110 whereby the wheel is washed twice . In some embodiments the wheel washer 200 further comprises a second washer 220 for washing the car-side A of the wheel 110 whereby both sides of the wheel 110 can be washed at the same time .

[0029] The first ( or second) washer 210 comprises an arm 211 that is rotatably attached to the structure 230 allowing the arm 211 to rotate (back and forth) so that a noz zle 212 is swept over the wheel 110 to be washed .

[0030] The second washer 220 comprises a reflector 221 directing the spray from a noz zle 222 towards the wheel 110 .

[0031] As mentioned above , the second washer 220 can also be of a similar rotatable construction as the first washer 210 , however, this arrangement saves space .

[0032] The wheel washer 200 further comprises a cradle 240 on which the wheel 110 can rest when being washed . The cradle 240 is in some embodiments arranged with a back support 245 , or arranged adj acent to one , for further supporting the wheel 110 . In some embodiments the wheel washer 200 is further arranged with one or more rollers 241 that are arranged to abut the wheel 110 so that they, when rolling, also causes the wheel 110 to roll . This allows for only spraying a radial portion of the wheel 110 , as the whole circumference of the wheel 110 will then be sprayed as the wheel rotates . The wheel washer 200 also comprises , in some such embodiments , a rolling support 242 for supporting and keeping the wheel 110 in place as it is rolled . In some embodiments at least one of the rollers is part of the cradle 240 , or arranged adj acent the cradle 240 where the wheel also rests ( at least partially) on the roller ( s ) 241 , as in the example of figure 2 . In some embodiments the roller ( s ) 241 is arranged outside the cradle 240 , and in such embodiments the cradle is arranged with rolling supports , adj acent or comprising .

[0033] In some embodiments the back support 245 is leaned at an angle ( shown as a in figure 2 , and in the example of figure 2 the angle a is 0 degrees ) so that the wheel 110 is leaned towards its car-side A. The leaning angle is in some embodiments between 5 and 15 degrees from a vertical ( imaginary ) line through the wheel 110 , and in some embodiments between, in some embodiments between 6 and 9 degrees and in some embodiments 8 degrees .

[0034] In order to control ( and also to automate ) the cleaning as disclosed herein, the wheel washer 200 may further comprise a controller 250 . The controller 250 is an electronic control unit , such as a processor or Programmable Logic Control circuit - or other known controllers - and comprises ( or connected to ) a memory . The controller 250 is able to - by reading computer-readable instructions stored in a memory comprised in ( or connected to ) - control the wheel washer 200 according to the cleaning disclosed herein . The controller 250 speci fically controls and causes the rollers 241 , the first washer 210 and the second washer 220 ( i f one is present ) .

[0035] In some embodiments the wheel washer 200 further comprises a wheel si ze sensor 251 , which is arranged to determine the si ze of the wheel 110 .

[0036] In some embodiments the wheel sensor is based on a light sensor, such as a photo sensor . In some embodiments the wheel sensor is based on an ultrasound sensor . In some embodiments the wheel sensor is based on a radar sensor or a LIDAR sensor . Such wheel si ze sensors 251 are known and requires no further details . Radar or ultrasonic (ultrasound) sensors are preferred for wheel size sensors that are to be arranged inside the wheel washer 200.

[0037] The wheel size can alternatively be determined by scanning the wheel and determine the size from the scan.

[0038] In some embodiments the wheel size sensor is a mechanical arm that drops down (or is otherwise moved towards the wheel) on the wheel and is then able to determine the size base on how far it moves.

[0039] In embodiments where the wheels are fed along a conveyor to the wheel washer, the size can be determined by knowing the travel speed (of the conveyor) and to determine the time that the (photo) sensor is blocked, which gives the size of the wheel .

[0040] Alternatively, the conveyor system may be arranged with arms that serve to align the wheel on the conveyor. Such arms may be used as a wheel size sensor in that they will sense the size of the wheel in how much they open when aligning the wheel .

[0041] The wheel size may be known for a wheel having been given an identity, wherein the wheel identity is associated with the wheel size and as the wheel enters the wheel washer, its identity is provided (from the greater system or through a scanner serving as the wheel size sensor) , whereby the size is also provided indirectly.

[0042] The wheel size can alternatively be determined by scanning the wheel and determine the size from the scan. In some embodiments, the wheel size sensor 251 is comprised in a gripper (not shown) for feeding the wheel to the wheel washer 200. The gripper may thus be seen as the wheel size sensor in such embodiments.

[0043] There may be more than one wheel size sensor 251. The wheel size sensor (s) 251 is (at least some of them) in some embodiments arranged in or at the wheel washer 200. The wheel size sensor (s) 251 is (at least some of them) in some embodiments arranged in a larger washing system, wherein the wheel size sensor 251 is - directly or indirectly via another controller, such as a controller of the greater system - connected to the wheel washer 200.

[0044] In some embodiments the controller 250 is thus arranged to receive an indication of the size of the wheel from the wheel size sensor 251.

[0045] In some embodiments the controller 250 is thus arranged to receive an indication of the size of the wheel from a user, for example through a control panel 252.

[0046] In some embodiments the controller 250 is thus configured to receive an indication of the size of the wheel 110.

[0047] The inventors have realized a simple and elegant solution to the problems discussed above. The Inventors have realized that the centre of the wheel 110 is usually not as dirty as the outer parts (such as the rim 111) of the wheel 110. This is because most dirt will be flung by rotational forces to the outer components of the wheel 110 (such as the inside of the rim 111) . The inventors have thereby also insightfully realized the very simple solution that the centre of the wheel 110 need not be cleaned at the same pressure of the spray of water leaving the nozzles (212, 222) .

[0048] The inventors have further realized three manners in which this can be accomplished also in existing wheel washers without significant modification being needed.

[0049] It should be noted that either of the three manners may be applied to either of the washers 210, 220, and may also be combined within a washer 210, 220.

[0050] A first manner is shown in figure 3, where a rotatable washer 210, as the first rotator discussed with reference to figure 2, is arranged to only supply a peripheral spray to the centre, and most notably the centre cap 120, by limiting the movement of the rotating (or rather pendulating) arm 211. The rotating arm is limited to only rotate up to a first extension El where "up" is considered to be in a direction towards the centre bore and the centre cap 120. In some embodiments, the first extension El is in some embodiments set to be at the edge of the centre bore / centre cap 120.

[0051] In some embodiments, the first extension El is in some embodiments set to be at a distance of 2, 2.5, 3 cm from the centre of the wheel 110, or in any range there in-between.

[0052] In some embodiments, the first extension El is in some embodiments set to be at a distance from an outer extension E2 (assumed to be at an outer edge of the wheel 110, such as in line with the cradle 240) , wherein the distance from the outer extension E2 is 12, 13, 14, or 15 inches, or in any range there in-between. As noted above, in some embodiments the controller 250 is configured to receive an indication of the size of the wheel 110, which enables the controller 250 to determine the first extension El and to control the arm 211 to not rotate past the first extension El.

[0053] By knowing the size of the wheel 110, the controller 250 can easily determine the centre of the wheel 110, and thus also determine the first extension El.

[0054] A second manner is shown in figure 4, where a rotatable washer 210, as the first rotator discussed with reference to figure 2, is arranged to adapt the pressure of supplied spray according to the distance from the centre. As is shown the rotating washer 210 is controlled to rotate between a first and a second extension El, E2. In the manner disclosed with reference to figure 4, the first extension may overlap the centre bore 120 of the wheel 110.

[0055] Figure 4 also shows a schematic graph of the pressure supplied through the nozzle 212 as a function of the location of the arm between the extensions. The pressure may be adapted in many different ways, where the key point is that the pressure is to be decreased or lower at the centre, than at the outer parts of the wheel 110. As is shown the pressure may be adapted linearly (full line) , step-wise (dashed line) or gradually (dotted line) .

[0056] In some embodiments the pressure is adapted so that the pressure is at 100 % at the outer extension E2 and at 10, 15, 20, 25 % or in any range therein-between at the first extension El . In some embodiments the nominal pressure is 2.5 - 3 bars, for example 2.6 bars on the curb-side of the wheel and for example 2.7 bars on the car-side of the wheel.

[0057] When the second manner disclosed with reference to figure 4 is to be combined with the manner disclosed with reference to figure 3, the first extension El will be adapted as per the first manner disclosed with reference to figure 3, and the pressure adapted as per the second manner disclosed with reference to figure 4.

[0058] A third manner is to provide a shield in a reflector 221 - or otherwise in front of the nozzle 212, 222.

[0059] One example of some embodiments is shown in figure 5, where a washer 220, being of a similar type as the second washer

[0060] 220 discussed in relation to figure 2, is arranged with a shield 223 on an inner side of the reflector 221. As is shown, the reflector has a curved shape which allows the spray (referenced S and indicated by the arrows) to be reflected from the nozzle 222 towards the wheel 110. It should be noted that even if the example reflector 221 of figure 5 is shown as curved, other shapes are possible. The shape of the reflector

[0061] 221 will depend on and vary with how the pole 224 is arranged.

[0062] The shield 223 is arranged adjacent the nozzle 222 so that it shields a portion of the spray S. The exact location of the shield 223 depends on many factors, as a skilled person would understand, but the shield is notably arranged to shield a portion of the spray S that would otherwise (if no shield present) reach the centre bore 120 of the wheel 110. In some embodiments the portion is an angular section AS around a line from the nozzle 221 (via the reflector) to the centre of the wheel 110.

[0063] Depending on the shape of the shield 221, the portion may not be an angular section around a (spray) line from the nozzle 221 to the centre of the wheel 110, and as noted above, the shape and placement of the shield 223 depends on the placement of the washer 220 relative the wheel 110 and the shape of the reflector .

[0064] In the example of figure 5, the shield is arranged on a ceiling portion 221A of the reflector 221, thus extending from the reflector 221 downwards. Notably, in this example, the shield does not extend down to the pole 224 (or any attachment to the pole 224) but is suspended from the ceiling 221A. In some embodiments the shield 223 extends halfway down (50%) , 60 % , 30% or 40 % of the way down or in any range there-in- between. This allows for less material to be used. And also allows for easier cleaning (of the nozzle 222 as the space around the nozzle 222 is kept free) .

[0065] The arrangement of figure 5 (and of figure 2) assumes that the (second) washer 220 is arranged so that a pole 224 carries and raises the nozzle 222 from a side of the structure 230, and specifically, in the examples of figures 2 and 5 from "below", where below is seen as the direction along the direction of the gravity when the wheel washer 200 mounted. Alternatively, the pole 224 may extend from behind the wheel 110 i.e. from a direction opposite where the wheel 110 is loaded into the wheel washer 200.

[0066] In one embodiment the nozzle 222 has a diameter of 10-20 mm for example 16 mm, the shield 223 has a width d2 of 10-20 mm for example 16 mm and is arranged at a distance dl (15-25 mm for example 20 mm) from the centre of the nozzle 222. In some embodiments the shield is wider than the nzzle. The shield 223 further extends d4 (20-25 mm for example 22 mm) from the ceiling 221A and to a height above the pole 224 (or other attachments) of d3 (5-15 mm for example 10 mm) . It should be noted that the measurements given are only examples and may vary. In some embodiment, any, some or all may vary by 5%, 10%, 15%, 25%, 50% or 100% or by any value in a range there in-between .

[0067] Another example of some embodiments is shown in figure 6, where a washer 220, being of a similar type as the first washer 210 discussed in relation to figure 2, is arranged with a shield 213 between the nozzle 212 and the centre bore 120.

[0068] The shield 213 is arranged along a path of the nozzle 212 so that it shields a portion of the spray S as the nozzle is rotated over the shield 213. The exact location of the shield 213 depends on many factors, as a skilled person would understand, but the shield is notably arranged to shield a portion of the spray S that would otherwise (if no shield present) reach the centre bore 120 of the wheel 110.

[0069] In some embodiments the shield has an extension in the path of the nozzle 212 that will shield the centre bore regardless of the size of the wheel.

[0070] As a wheel of one size will have its centre bore 120 at another location than a wheel of a second size, the travel path of the nozzle 212 will not overlap with the shield 213 other than just at the centre bore 120 for every rotation of the wheel if the wheel is controlled to rotate at a different frequency than the washer 210. The shape and placement of the shield 213 will depend on and vary with how the washer 210 is arranged, and the length of the arm 211 as well as the spay angle of the nozzle 212.

[0071] The shield is thus, in some embodiments arranged and shaped to follow a portion of the travel path of the nozzle 212, where the portion starts (or ends depending on the direction of travel) at the location of a largest size of wheel, and ends (or starts depending on the direction of travel) at the location of the smallest size of wheel. The portions thus extends from the centre bore of the smallest wheel size to the centre bore of the largest wheel size. And in some such embodiments the controller is configured to rotate (or roll) the wheel at a different rotational frequency than the rotation of the washer 210. It should be noted that due to wheel slip, the wheel may be caused to rotate at a different speed than that of the roller - and thus also at a different frequency with regards taken of course to difference in size of the wheel and the roller.

[0072] A shield 213 may be combined with a limited movement, and or a limited (adapted) pressure. This allows for having a smaller shield 213 as the spray hitting the shield 213 will be of a lower pressure.

[0073] As the shield most likely will not block all the spray S, and wheel portions in the blocked line of the shield will still be washed by stray spray, i.e. spray that has been reflected of other surfaces, or water that is swirled around by other factors (such as the rolling wheel) . Utilizing a shield will thus also provide a cleaning or washing of the wheel at an adapted pressure. All embodiments herein thus provide a washing of a wheel where a centre portion, such as the area of the centre bore , is provided with washing fluids at a reduced pressure through peripheral spray compared to other portions which are washed with direct spray . The pressure is signi ficantly reduced, so that the pressure of the peripheral spray is less than 50% , 30% , 25% , 15% or even lower than 10% of the pressure of the direct spray . When washing with granules in the washing fluid, the granules have a mass and due to the inertia of the granules , it will take some time to get the granules moving along with the water i f the pressure drops too much . How much of course depends on the composition of the washing fluid, such as surface tension and si ze and mass of the granules . In such embodiments the pressure of the peripheral spray is less than 50% , 30% , or 25% , but higher than 15% of the pressure of the direct spray .

[0074] The area of the centre bore 120 is defined as the area of the centre bore or an area slightly larger ( 5 or 10% ) larger than the centre bore , co-centred with the centre bore 120 . The peripheral pressure referred to herein is also referred to as an adapted pressure compared to the usual (nominal ) pressure that the rest of the wheel is to be washed with . I f the pressure is adapted in steps , gradually or linearly, the nominal pressure indicates the maximum pressure .

Claims

CLAIMS1. A wheel washer (200) comprising a washer (210, 220) configured to provide spray of a washing fluid through a nozzle (212, 222) onto a wheel (110) to be washed, wherein the wheel washer (200) is characterized in that the washer (210, 220) is further configured to provide the spray to a centre bore area (120) at an adapted pressure and provide the spray outside the centre bore area (120) at least partially at a nominal pressure, wherein the adapted pressure is less than 50% of the nominal pressure.

2. The wheel washer (200) according to claim 1, wherein the washer is arranged to provide the spray to the centre bore area (120) through stray spray and provide the spray outside the centre bore area (120) through direct spray.

3. The wheel washer (200) according to claim 2, wherein the washer (210, 220) is arranged with a shield (213, 223) arranged so that the spray of washing fluid from the nozzle (212, 222) is shielded from reaching the centre bore area (120) , whereby the centre bore area (120) will be washed by stray spray when in use.

4. The wheel washer (200) according to claim 2, wherein the shield (223) is arranged on a reflector (221) along a spray line from the nozzle (222) to the centre bore area (120) so that the spray of washing fluid from the nozzle (222) is shielded from reaching the centre bore area (120) , whereby the centre bore area (120) will be washed by stray spray when in use .

5. The wheel washer (200) according to claim 2, wherein the washer (210) comprises a rotatably arranged arm (211) carryingthe nozzle (212) and wherein the shield (213) is arranged on a travelling path of the nozzle (212) between the shield (213) and the wheel when in use, whereby the nozzle (212) is prevented to spray directly on the centre bore area (120) and whereby the centre bore area (120) will be washed by stray spray when in use.

6. The wheel washer (200) according to claim 4, wherein the shield (213) is arranged on a portion of the travelling path, wherein the portion of the travelling path extends from a location of a centre bore area (120) of a largest accepted size of wheel and to a location of a centre bore area (120) of a smallest accepted size of wheel.

7. The wheel washer (200) according to claim 6, wherein the wheel washer (200) further comprises a controller configured to control the rotatable washer (210) to rotate at a first frequency and to control the wheel to roll at a second frequency, when in use, wherein the first frequency is not the same as the second frequency .

8. The wheel washer (200) according to claim 2, wherein the washer (210) comprises a rotatably arranged arm (211) carrying the nozzle (212) in order to spray the wheel when in use, wherein the washer (210) is configured to rotate to a first extension outside the centre bore area (120) from an outer portion of the wheel when in use, whereby the nozzle (212) is prevented to spray directly on the centre bore area (120) whereby the centre bore area (120) will be washed by stray spray when in use.

9. The wheel washer (200) according to claim 8, wherein the washer (210) further comprises a controller (250) configured to receive an indication of a size of the wheel and to determine the first extension (el) based on the size of the wheel .

10. The wheel washer (200) according to claim 1, wherein the washer (210) comprises a rotatably arranged arm (211) carrying the nozzle (212) in order to spray the wheel when in use, wherein the wheel washer (200) is configured to provide the washing fluid through the nozzle (212) at the adapted pressure in the centre bore area (120) and at the nominal pressure outside the centre bore area (120) by regulating the pressure supplied through the nozzle based on a distance to the centre bore area (120) along a travelling path of the nozzle (212) .

11. The wheel washer according to claim 8 and 10, wherein the rotating arm of claim 8 is the same as the rotating arm of claim 10.

12. The wheel washer according to claim 8 and any of claims 2 to 7.

13. The wheel washer according to claim 10 and any of claims 2 to 7.

14. The wheel washer according to claim 11 and any of claims 2 to 7.

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