WO2015105838A1 - Filtre de sortie de régulateur d'air - Google Patents

Filtre de sortie de régulateur d'air Download PDF

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Publication number
WO2015105838A1
WO2015105838A1 PCT/US2015/010427 US2015010427W WO2015105838A1 WO 2015105838 A1 WO2015105838 A1 WO 2015105838A1 US 2015010427 W US2015010427 W US 2015010427W WO 2015105838 A1 WO2015105838 A1 WO 2015105838A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter
tire
cavity
outlet
filter media
Prior art date
Application number
PCT/US2015/010427
Other languages
English (en)
Inventor
Robert Benedict
Chenghsiung Lin
Robin Lamgaday
Brian R. MORRIS
Ramakrishna Bhoga
Sagar PINGALE
Larry Bennett
Derek K. SCHMID
Robert A. Dayton
Ravikumar DINNI
Jeff CAMILLERI
Brian O'neil
Robert Boychuk
Original Assignee
Eaton Corporation
The Goodyear Tire & Rubber Company
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Eaton Corporation, The Goodyear Tire & Rubber Company filed Critical Eaton Corporation
Publication of WO2015105838A1 publication Critical patent/WO2015105838A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
    • B60C23/10—Arrangement of tyre-inflating pumps mounted on vehicles
    • B60C23/12—Arrangement of tyre-inflating pumps mounted on vehicles operated by a running wheel
    • B60C23/135—Arrangement of tyre-inflating pumps mounted on vehicles operated by a running wheel activated due to tyre deformation

Definitions

  • a self-inflating tire system can use a pump that is built into a tire to automatically maintain a vehicle's tire pressure at a target pressure.
  • a regulator senses when the tire is at the target pressure.
  • an inlet filter in the regulator allows some outside air into the pumping tube which runs circumferentially around the inside of the tire. Deformations of the tube as the tire rolls compress air inside the tube. The air can be discharged through the regulator into the tire cavity to inflate the tire.
  • An air pressure regulator outlet filter for a self-inflating tire includes a filter body to be attached to a housing of an air regulator of the self-inflating tire.
  • the housing has a cavity to be in fluid communication with an air outlet of the regulator.
  • the cavity is also in fluid communication with a tire cavity of the self-inflating tire.
  • a filter media is attached to the filter body, to block contaminants from entering the housing cavity while allowing pressurized air to be exhausted through the filter media into the tire cavity.
  • FIG. 1 is a perspective view of an example of a self-inflating tire regulator with an example of an outlet filter of the present disclosure
  • FIG. 2 is a cross-sectional view of a wheel and tire depicting an example of a regulator mounted on the tire according to the present disclosure
  • FIG. 3 is a semi-schematic top view of the example of the self-inflating tire regulator with outlet filter depicted in Fig. 1 ;
  • FIG. 4 is a semi-schematic, right side view of the example of the self-inflating tire regulator with outlet filter depicted in Fig. 1 with a cross-section taken as indicated in Fig. 3;
  • FIG. 5 is a semi-schematic, top view of the example of the self-inflating tire regulator with outlet filter depicted in Fig. 1 with a cross-section taken as indicated in Fig. 1 ;
  • Fig. 6 is a semi-schematic perspective view of a self-inflating tire regulator with partially exploded views of two outlet filter modules of the present disclosure.
  • Fig. 7 is a cross-sectional view of an example of a filter media according to the present disclosure. DETAILED DESCRIPTION
  • the present disclosure relates generally to an air regulator outlet filter.
  • a filter can be used, for example, with a self-inflating tire system used with the tires of a commercial truck. It is to be understood that outlet filters according to the present disclosure can be used with various sizes of tires for various types of vehicles.
  • Debris can be found inside a tire cavity.
  • dust, water, insects, rubber particles, mounting lubricants, and air compressor oil can be present in the tire cavity.
  • the regulator includes valves to regulate a discharge of air through a discharge port into the tire cavity.
  • an outlet filter blocks entry of debris from the tire cavity into the regulator while allowing air to flow from the discharge port into the tire cavity.
  • Fig. 1 is a perspective view of an example of an air regulator 120 according to the present disclosure.
  • the pneumatic control valve 10 can be mounted on the docking station 100.
  • the housing 12 can be a single molded piece that saves weight and has a low center of gravity that can reduce rotational inertia loads between the pneumatic control valve 10 and the docking station 100 when the tire 50 (see Fig. 2) is rotating.
  • the housing 12 can include outer portions of the outlet filters 14, 14'. Air from the peristaltic pump (not shown) is ultimately discharged through the outlet filters 14, 14'.
  • the outlet filters 14, 14' can substantially prevent foreign matter that can be in the pressurizable tire cavity 52 (see Fig. 2) from fouling the air regulator 120.
  • the air regulator 120 can include a filter body 28 to be attached to the housing 12 of the air regulator 120 of the self-inflating tire 50 (see Fig. 2).
  • the housing 12 can have a cavity 25 to be in fluid communication with an air outlet 154 in fluid communication with a pressurizable tire cavity 52 (see Fig. 2) of the self- inflating tire 50 (see Fig. 2).
  • the air regulator 120 can have a filter media 16 to block contaminants from entering the cavity 25 while allowing pressurized air to be
  • a self-inflating tire system can pump enough air to make up for normal losses in a tire.
  • a self-inflating tire system can pump about one psi into a 100 psi tire over a month.
  • a range of airflow from about 250 SCCM (Standard Cubic Centimeters per Minute) to about 1000 SCCM can flow through the outlet filter 14.
  • a commercial truck tire can contain 150 liters of air at about 100 psi (689 kilopascals) under normal operating conditions.
  • the air flowing from the pneumatic control valve 10 into the tire cavity 52 passes through the outlet filter 14, 14', the air passing through the outlet filter 14 will normally be clean, having passed through an inlet air filter (not shown).
  • the outlet filter 14 of the present disclosure can prevent contamination of the pneumatic control valve 10 by debris that would otherwise enter the pneumatic control valve 10 from the tire cavity 52 during times when air is not flowing through the outlet filter 14. For example, debris can move in the tire cavity 52 when the tire 50 drops off a curb at low vehicle speed.
  • FIG. 3 is a top view of the example of the air regulator 120 depicted in Fig. 1 according to an example of the present disclosure.
  • Retention feature 64, 64' of outlet filter 14, 14' is shown engaging slot 66, 66' in housing 12.
  • Fig. 3 shows a cut-line and view direction for Fig. 4.
  • Fig. 4 is a cross-sectional view of the example of the air regulator 120 depicted in Fig. 1 taken through the section indicated in Fig. 3. Fig. 4 depicts the first tire pressure check valve 34.
  • the structure of the first tire pressure check valve 34 is similar to that of the second tire pressure check valve 34'.
  • the filter body 28 can define a stepped cylindrical outer surface 151 having sequentially diminishing diameters from an outer end 152 to an inner end 153 opposite the outer end 152.
  • the cavity 25 can be defined in the filter body 28 by a cylindrical cavity wall 155 having a cavity wall inner diameter 156 and a cavity wall outer diameter 157.
  • the filter body 28 can define an annular filter media retention flange 158.
  • the annular filter media retention flange 158 can extend radially outward from the cavity wall outer diameter 157 and axially from the cavity wall 155 toward the outer end 152.
  • the filter body 28 can define a resilient seal tier 159 having a cylindrical sealing surface 160 with surface diameter 161 extending axially from the cavity wall 155 in a direction 162 opposite to the filter media retention flange.
  • the surface diameter 161 of the cylindrical sealing surface 160 can be smaller than the cavity wall outer diameter 157.
  • a resilient seal 170 can be compressed between the surface diameter 161 and a tire pressure check valve filter socket 165 to prevent contaminants from bypassing the filter media 16.
  • the filter body 28 can define a tire pressure check valve spring retention peg 164, 164' coaxial to the tire pressure check valve bore 37, 37' to align a tire pressure check valve spring 8, 8' with the tire pressure check valve bore 37, 37'.
  • the cavity wall outer diameter 157 can be complementary to an inner diameter of a tire pressure check valve filter socket 165 to receive the cavity wall outer diameter 157 with a slip fit between the tire pressure check valve filter socket 165 and the cavity wall outer diameter 157.
  • a tire pressure check valve bore 37, 37' can be defined in the valve body 30, and the tire pressure check valve bore 37, 37' can be in fluid communication with the pressurizable tire cavity 52 and the respective first port 62 or second port 62'.
  • a check valve seat 76, 76' can be defined at a pump port end 27, 27' of the tire pressure check valve bore 37, 37'.
  • the check valve seat 76, 76' can circumscribe a conduit leading to the respective first port 62 or second port 62'.
  • the reference numeral indicator lines for the first port 62 and second port 62' are shown in Fig. 5 in hidden line to indicate that the ports 62, 62' are in fluid connection to the indicated location.
  • the ports 62, 62' are not actually visible in Fig. 5. See Fig. 4 for a view of the first port 62 in the example of the present disclosure shown in Figs. 1 , 4 and 5.
  • a tire pressure check valve ball 38, 38' can be operatively disposed in the tire pressure check valve bore 37, 37'.
  • a tire pressure check valve spring 8, 8' can bias the tire pressure check valve ball 38, 38' lightly against the check valve seat 76, 76'.
  • the tire pressure check valve ball 38, 38' can operatively engage the check valve seat 76, 76' to substantially prevent fluid flow from the pressurizable tire cavity 52 to the respective first 62 or second port 62' in response to a pressure difference across the first tire pressure check valve 34 and the second tire pressure check valve 34'.
  • a pressure difference of about one psi can open the first tire pressure check valve 34 or the second tire pressure check valve 34' for flow from the respective first port 62 or second port 62' to the pressurizable tire cavity 52.
  • the tire pressure check valve ball 38, 38' can operatively disengage the check valve seat 76, 76' to open the respective first 34 or second tire pressure check valve 34' for fluid flow from the respective first port 62 or second port 62' to the pressurizable tire cavity 52 in response to a pressure difference across the respective first tire pressure check valve 34 or the second tire pressure check valve 34'.
  • the first tire pressure check valve 34 can allow compressed air from the peristaltic pump (not shown) to flow into the
  • the tire pressure check valve ball 38 can operatively engage the check valve seat 76 when the tire pressure in the pressurizable tire cavity 52 is greater than the pressure in the first port 62. Conversely, when the tire pressure in the pressurizable tire cavity 52 is at least one psi below the pressure in the first port 62, the tire pressure check valve ball 38 can operatively disengage the check valve seat 76 and allow air to flow from the first port 62 into the tire cavity 52. As shown in Fig. 5, an outlet filter 14, 14' can be included in the air path between first tire pressure check valve 34 or the second tire pressure check valve 34' and the pressurizable tire cavity 52.
  • the outlet filter 14, 14' can include a filter cover 19, 19' disposed adjacent to a piece of filter media 16, 16'.
  • the filter media 16, 16' can be disposed between the filter cover 19 and the filter body 28 to filter air flowing through the filter media 16, 16' into a cavity 25, 25' of the outlet filter 14, 14'.
  • the cavity 25, 25' can be in fluid communication with the respective first port 62 or second port 62' receiving air from the pump via the pneumatic control valve 10 of the air regulator 120.
  • the filter media 16, 16' can block contaminants from entering the cavity 25, 25' while allowing atmospheric air to be discharged through the filter media 16, 16' from the cavity 25, 25' into the pressurizable tire cavity 52.
  • the filter media 16, 16' can substantially block contaminants from entering the cavity 25, 25' while allowing a small amount of contaminants to pass through the filter media 16, 16'.
  • substantially block can be defined to mean contaminants in the form of particulate matter will be blocked when the particulate matter is larger than a predetermined size.
  • the efficiency of the filter media 16 can be at least about 90 percent when exposed to 150 grams of dust at a maximum flow rate using SAE J726 JUN2002, Air Cleaner Test Code, Section 5.4. After exposure to the dust, the pressure drop across the outlet filter 14, 14' is within about 70% of the pressure drop at clean outlet filter 14, 14' conditions. Pressure drop is measured at maximum flow rate.
  • the pressure drop across a clean outlet filter 14, 14' can be less than about one psi when measured at maximum flow rate. It is to be understood that the filter cover 19, 19' and the cavity 25, 25' can be sized to accommodate the airflow requirements of the outlet filter 14, 14'.
  • the outlet filter 14, 14' can omit the filter cover 19, 19'.
  • the clean side 77 (see Fig. 4) of the filter media 16, 16' is opposite the dirty side 79 of the filter media 16.
  • the dirty side 79 of the filter media 16 is the side of the filter media 16, 16' exposed to the pressurizable tire cavity 52.
  • the clean side 77 of the filter media 16, 16' is exposed to the cavity 25, 25'.
  • a membrane can be used as a filter media 16, 16' to block water or other contaminants.
  • membrane can be defined to mean a layer of material which serves as a selective barrier between two phases (i.e., liquid water and vapor) and remains impermeable to specific particles, molecules, or substances when exposed to the action of a driving force.
  • the membrane in examples, can be about 0.5 mm thick and can be fixed to the filter body 28, 28' with an adhesive.
  • Contaminants can be introduced to the pressurizable tire cavity 52 in many ways. For example, before the tire 50 is mounted, insects and rodents can occupy the tire 50 and build nests that cannot be removed before the tire 50 is mounted.
  • Lubricants used during mounting can remain in the pressurizable tire cavity 52.
  • Water and compressor lubricant can be carried in the airstream during an initial fill of the tire 50. Ice crystals can form in the tire cavity 52. Rust particles can become detached from wheels and be carried by currents in the tire.
  • the contaminants listed herein are non-limitative examples of contaminants that can be encountered by the outlet filter 14, 14' of the present disclosure.
  • the filter media 16, 16' can have a single layer, or include a plurality of layers.
  • Fig. 7 depicts an example of a filter media 16, 16' having a first filter layer 182, a second filter layer 183, and a third filter layer 184.
  • Other examples can have more layers, or fewer layers.
  • the filter media 16, 16' can include a
  • fiber layers can include a polytetrafluoroethylene (PTFE) fiber (e.g., Teflon® fiber, available from E. I. du Pont de Nemours and Company, Wilmington, Delaware) and/or can include expanded polytetrafluoroethylene (ePTFE) (e.g., Gore-Tex® brand materials, available from W. L. Gore & Associates, Inc., Elkton, Maryland).
  • PTFE polytetrafluoroethylene
  • ePTFE expanded polytetrafluoroethylene
  • the porous solid layer can include compressed carbon charcoal.
  • the filter media 16 can include a layer of activated carbon disposed between two woven fiber layers.
  • An example of a membrane layer can include a non-woven nylon/polyamide, e.g., Versapor® 450R from Pall.
  • the outlet filter 14, 14' can be modular, thereby allowing simple replacement of the filter media 16, 16' when the tire 50 is dismounted from the wheel 98 (see Fig. 2).
  • the filter media 16, 16' can be replaceable without permanently disabling a portion of the air regulator 120 other than the filter media 16, 16' to be replaced.
  • the housing 12 can be a single molded piece that includes the valve body 30, outer portions of the outlet filter 14, 14', and other portions of the pneumatic control valve 10 shown in the Figures, whereas the filter cover 19, 19' can be removable to provide access to the filter media 16, 16' for replacement.
  • the filter body 28, 28' can be replaceable together with the filter media 16, 16'.
  • Slots 66, 66' can engage retention feature 64, 64' (see Fig. 4) of the housing 12.
  • the retention feature 64, 64' can be a resilient tab, interoperable with a respective slot 66, 66' to deform and enter the space created by slot 66, 66' to form a snap lock between the filter cover 19, 19' and the housing 12.
  • the retention feature 64, 64' can be stiffer than the housing 12, and therefore the housing 12 can deform around retention feature 64, 64' during assembly.
  • the snap retention of the filter cover 19, 19' onto the housing 12 can allow retention without separate fasteners, ease assembly, and facilitate serviceability of the outlet filter 14, 14'.
  • the outlet filter 14, 14' can allow the filter media 16, 16' to be replaced without permanently destroying the outlet filter 14, 14'.
  • Fig. 4 shows insert 1 12 positioned in first cylindrical connector 74.
  • the insert can have a tubular portion 1 13 with a barb 1 14 to engage a tube (not shown) that leads through port 62 to the peristaltic pump.
  • the insert 1 12 has a wide flange 1 15 that can prevent the insert 1 12 from being inserted too far into the cylindrical connector 74.
  • the tube (not shown) can be wedged between the tubular portion 1 13 of the insert 1 12 and the inside wall of the first cylindrical connector 74 to create a seal between the tube (not shown) and the first cylindrical connector 74.
  • the insert 1 12 also can prevent the cylindrical connector 74 from collapsing under pressure.
  • the filter media 16, 16' is shown outside of the filter body 28, 28' to indicate that the filter media 16, 16' can be replaceable in the outlet filter module 42, 42'.
  • the outlet filter module 42, 42' can include the filter media 16, 16', the filter body 28, 28', the resilient seal 170, 170', and the filter cover 19, 19'.
  • the filter media 16, 16' can be a disk with a filter diameter 166 complementary to an inner diameter 167 of the annular filter media retention flange 158.
  • the filter cover 19, 19' selectably retains the outlet filter module 42, 42' in the housing 12.
  • the filter cover 19, 19' can have a plurality of filter cover perforations 168, 168' to allow air flow through the filter cover 19, 19' from the filter media 16, 16'.
  • the filter cover 19, 19' can have a resilient tab 169, 169' interoperable with a slot 66, 66' defined in the housing to resiliently deform and enter the slot 66, 66' to engage the slot 66, 66' and form a selectable snap lock between the filter cover 19, 19' and the housing 12.
  • connection and/or the like are broadly defined herein to encompass a variety of divergent connected arrangements and assembly techniques. These arrangements and techniques include, but are not limited to (1 ) the direct communication between one component and another component with no intervening components therebetween; and (2) the communication of one component and another component with one or more
  • ranges provided herein include the stated range and any value or sub-range within the stated range.
  • a range from about 250 SCCM to about 1000 SCCM should be interpreted to include not only the explicitly recited limits of about 250 SCCM and about 1000 SCCM, but also to include individual values, such as 250 SCCM, 375 SCCM, 750 SCCM, etc., and sub-ranges, such as from about 270 SCCM to about 500 SCCM, etc.
  • sub-ranges such as from about 270 SCCM to about 500 SCCM, etc.
  • when "about” is utilized to describe a value this is meant to encompass minor variations (up to +/- 10%) from the stated value.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)

Abstract

L'invention porte sur un filtre de sortie de régulateur de pression d'air pour un pneu auto-gonflant, lequel filtre comprend un corps de filtre destiné à être fixé à un boîtier d'un régulateur d'air du pneu auto-gonflant. Le boîtier a une cavité destinée à être en communication fluidique avec une sortie du régulateur. La cavité est également en communication fluidique avec une cavité du pneu auto-gonflant. Un milieu de filtre est fixé au corps de filtre, pour empêcher des contaminants d'entrer dans la cavité de boîtier, tout en permettant à de l'air comprimé être évacué à travers le milieu de filtre dans la cavité de pneu. Le milieu de filtre peut être remplacé.
PCT/US2015/010427 2014-01-07 2015-01-07 Filtre de sortie de régulateur d'air WO2015105838A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US201461924651P 2014-01-07 2014-01-07
US61/924,651 2014-01-07
US201461931916P 2014-01-27 2014-01-27
US61/931,916 2014-01-27
US201462011778P 2014-06-13 2014-06-13
US62/011,778 2014-06-13

Publications (1)

Publication Number Publication Date
WO2015105838A1 true WO2015105838A1 (fr) 2015-07-16

Family

ID=52463128

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2015/010427 WO2015105838A1 (fr) 2014-01-07 2015-01-07 Filtre de sortie de régulateur d'air

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WO (1) WO2015105838A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6533010B1 (en) * 2001-08-03 2003-03-18 Nelson Alonso Air regulating system for wheels
EP2565060A1 (fr) * 2011-08-30 2013-03-06 The Goodyear Tire & Rubber Company Pneu autogonflant

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6533010B1 (en) * 2001-08-03 2003-03-18 Nelson Alonso Air regulating system for wheels
EP2565060A1 (fr) * 2011-08-30 2013-03-06 The Goodyear Tire & Rubber Company Pneu autogonflant

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