WO2005042932A2 - Oil separator for vehicle air system - Google Patents
Oil separator for vehicle air system Download PDFInfo
- Publication number
- WO2005042932A2 WO2005042932A2 PCT/US2004/036034 US2004036034W WO2005042932A2 WO 2005042932 A2 WO2005042932 A2 WO 2005042932A2 US 2004036034 W US2004036034 W US 2004036034W WO 2005042932 A2 WO2005042932 A2 WO 2005042932A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- oil separator
- air
- oil
- fixture
- set forth
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/002—Air treatment devices
- B60T17/004—Draining and drying devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N39/00—Arrangements for conditioning of lubricants in the lubricating system
- F16N39/002—Arrangements for conditioning of lubricants in the lubricating system by deaeration
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S55/00—Gas separation
- Y10S55/19—Crankcase ventilation
Definitions
- the present invention relates to a vehicle air system and specifically to an oil separator for removing oil from compressed air used in the system.
- An oil separator is conventionally used with vehicle compressed air systems to clean contaminants, such as lubricating oil, from the air pumped from the compressor.
- An oil separator may significantly restrict the flow of air through the air brake system if it becomes clogged with carbon from the oil in the compressed air. Restricting the flow of air causes significant back pressure which can cause damage to the compressor.
- the air brake system typically includes an air dryer downstream of the compressor, with a replaceable cartridge.
- the lifespan of the air dryer cartridge is determined in large measure by how much oil is entrained in the air delivered to the air dryer. Too much oil, or even small amounts of oil, inside the air dryer will negatively affect the performance of the air dryer and increase the frequency of the maintenance service required on the air dryer.
- the separator preferably removes as much oil as possible from the air in the system. Oil that is removed from the system is typically dumped or wasted, which can be costly and environmentally damaging. Summary of the Invention [0004] In one aspect the present invention relates to an oil separator for use in a vehicle air system.
- the separator includes a fixture for mounting the oil separator to a vehicle, an oil separator cartridge attached to the fixture for coalescing oil in air supplied to the oil separator, and a recycling valve for removing coalesced oil from the oil separator.
- the recycling valve may include a piston movable in a cylinder in response to a control air pressure to open the recycling valve.
- the recycling valve may include an inlet port in fluid communication with the cartridge through a sump and also an outlet port.
- the piston may be movable in response to a control air pressure from the closed position to an open position enabling fluid to flow out of the sump through the inlet port and the outlet port.
- the invention in another aspect relates to a method including the steps of directing compressed air into a cartridge of an oil separator to coalesce oil in the compressed air, collecting the coalesced oil in a sump attached to the oil separator, and opening a recycling valve attached to the sump to enable coalesced oil to flow out of the sump.
- the method may also include the step of forcing the coalesced oil to flow out of the sump through the recycling valve under air pressure from the sump.
- the present invention relates to an oil separator for use i a vehicle air system, including a fixture for mounting the oil separator to a vehicle, and an oil separator cartridge attached to the fixture for coalescing oil in air supplied to the oil separator.
- the fixture includes an inlet port for allowing air from a compressor into the fixture and a delivery port for allowing air to exit the oil separator after being cleaned.
- the fixture also includes a plurality of ports extending from the inlet port for directing air from the inlet port into the cartridge.
- the plurality of ports have a combined flow area at least equal to the flow area of the inlet port.
- the plurality of ports preferably extend at a right angle to the direction of flow of air through the inlet port.
- the fixture may be made from a single piece of metal.
- the present invention relates to an oil separator for use in a vehicle air system, including a fixture for mounting the separator to a vehicle, an inlet port for allowing air from a compressor into said fixture, and a delivery port for allowing air to exit said oil separator after being cleaned.
- the fixture includes a pressure relief valve in fluid communication with the inlet port for releasing air from the oil separator in response to air pressure reaching a predetermined amount.
- FIG. 1 is a schematic illustration of a vehicle braking system including an oil separator in accordance with the present invention.
- Fig. 2 is a perspective view of the oil separator of Fig. 1;
- FIG. 3 is another perspective view of the oil separator of Fig. 1;
- Fig. 4 is a sectional view of parts of the oil separator of Fig. 1 showing an inlet flow path to a cartridge that forms part of the oil separator;
- Fig. 5 is a sectional view similar to Fig. 4 showing an outlet flow path from the cartridge
- Fig. 6 is a sectional view similar to Fig. 4 showing an outlet flow path from a sump that forms part of the oil separator;
- Fig. 7 is a sectional view through a recycling valve that forms part of the oil separator
- Fig. 8 is a sectional view similar to Fig. 7 showing parts of the recycling valve in an open condition
- Fig. 9 is a perspective view of an oil separator constructed in accordance with a second embodiment of the invention.
- Fig. 10 is a perspective view of a fixture that forms part of the oil separator of Fig. 9;
- Fig. 11 is a sectional view taken generally along line 11-11 of Fig. 10.
- the present invention relates to a vehicle air system and specifically to an oil separator for removing oil from compressed air used in the system.
- the present invention is applicable to oil separators of varying constructions.
- Fig. 1 illustrates an oil separator 10 constructed in accordance with a first embodiment of the invention.
- the separator 10 forms part of a vehicle air braking system 12.
- the vehicle braking system 12 also includes a compressor 14.
- the compressor 14 supplies air to the separator 10 through an air line 16. Clean air from the separator 10 flows to an air dryer 18 through another air line 20. Dry air from the dryer 18 flows to the vehicle brakes (and other accessories) through an outlet fitting 22 on the air dryer.
- Another air line 24 from the compressor 14 is connected with a recycling valve 30 on the separator 10, to supply a control signal as described below.
- the system 12 also includes a return oil line 32 extending from the recycling valve 30.
- the oil separator 10 (Fig. 2) includes a housing or fixture 40 and a cartridge 42.
- the fixture.40 is preferably machined from a single block of aluminum, although it could be made in another manner and from another material.
- the fixture 40 has grooves 44 on two opposing sides for securing the separator 10 on the vehicle.
- the fixture 40 has a threaded post 46 (Fig. 4) on a top surface 48 for connecting with the cartridge 42. The connection allows the cartridge 42 to rest or stand on the top surface 48 of the fixture 40 after being assembled to the fixture.
- the thread design for the threaded post 46 is specific to the attaching means of the cartridge 42.
- the fixture 40 (Fig. 4) includes a supply or inlet port 50 and a delivery or outlet port 52 (Fig. 5).
- the inlet port 50 receives pressurized air from the compressor 14.
- the inlet port 50 is connected internally in the fixture 40 by a cross-passage 53 with at least two internal ports 54.
- Preferably more than two of the ports 54 are provided, for example six to twelve ports.
- the ports 54 extend at right angles to the direction of air flow through the inlet port 50 and the cross passage 53, and connect the inlet port with the cartridge 42.
- the fixture 40 includes an exit passage 56 (Fig. 5 that extends through the threaded post 46.
- the exit passage 56 is in fluid communication with the interior of the cartridge 42.
- the exit passage 56 branches into at least two exit channels 58.
- a threaded post 60 is provided on a bottom surface 62 of the fixture 40.
- the post 60 may be similar in configuration to the threaded post 46 on the top surface 48 of the fixture 40.
- a sump 70 is screwed on the post 60.
- the exit channels 58 communicate with the sump 70.
- the sump 70 has an exit passage 72 that extends through the threaded post 60 on the bottom surface 62 of the fixture 40.
- the exit passage 72 is connected to the delivery port 52.
- compressed air is pumped to the separator from the compressor 14. Before entering the cartridge 42, the air flows through the inlet port 50 of the fixture 40. The flow of air branches off into the at least two inlet ports 54.
- the size and number of the inlet ports 54 is selected to achieve a flow area that is equal to the flow area of the inlet port 50.
- the multiple inlet ports 54 to the cartridge 42 provide a free flow path for air coming from the compressor 14, thus reducing back pressure. This reduction in back pressure can increase the life and reliability of the compressor 14.
- the flowing air must make at least one right angle turn from the inlet port 50 to move into the inlet ports 54. This re-direction of the air flow slows the air flow and creates turbulence.
- the multiple inlet ports 54 also help to disperse the oil throughout the cartridge 42. All these factors help to cause any oil that is entrained in the air to coalesce into droplets, and produce a better cleaning effect.
- As the air flows through the cartridge 42 oil is separated from the air, condensing into large oil droplets.
- the exit passage 56 receives compressed air and oil droplets from the cartridge 42.
- the air and condensed oil flow through the passages 58 into the sump 70.
- the oil droplets are deposited and accumulated in the sump 70, mainly due to gravity.
- the cleaned air exits from the sump 70 through its exit passage 72.
- the exit passage 72 is connected to the delivery port 52 which delivers the filtered compressed air downstream to the air dryer 18 (Fig. 1) through the air line 20.
- the recycling valve 30 (Figs. 7 and 8) includes a housing 74.
- a cylinder 76 in the housing 74 supports a piston 78 for reciprocal sliding movement in the housing.
- the piston 78 is biased to a closed position (Fig. 7) in the cylinder by a spring or other biasing means 80.
- O-rings 82 on the piston 78 prevent leakage of oil and pressurized air past the piston to atmosphere.
- the housing 74 of the recycling valve 30 includes an inlet port 84 that communicates with the sump 70.
- the inlet port 84 may be formed in differing manners and in the illustrated embodiment is formed in a hollow threaded post 86 that connects with an exit port of the sump 70.
- the housing 74 also includes an outlet port 90 for directing oil out of the recycling valve 30 and returning it to the engine or to the compressor 14.
- the outlet port 90 is located adjacent the inlet port 84.
- the recycling valve 30 has a control port 92.
- the control port 92 is in fluid communication with the cylinder 76 within the recycling valve 30.
- the control port 92 is connected to a delivery port 94 (Fig. 1) of a governor 96 of the compressor 14.
- the control port 92 is effective to receive control air under pressure.
- the governor 96 monitors pressure downstream from the compressor 14.
- valve 30 When the valve 30 is in the closed condition shown in Fig. 7, a portion 98 of the piston 78 blocks fluid communication between the inlet port 84 and the outlet port 90. Oil that is accumulated in the sump 70 therefore remains in the sump.
- the valve 30 may be actuated when the compressor 14 is unloaded, or at other preselected or predetermined times. Thus, in the preferred embodiment, if the pressure downstream of the oil separator 10 reaches a preset value, the compressor 14 unloads (stops sending air to the separator). As a result, a suitable control signal (control pressure) is applied to the control port 92. The piston 78 moves from the closed position shown in Fig. 7 to the open position shown in Fig. 8, against the bias of the spring 80. Fluid communication between the inlet port 84 and the outlet port 90 is established.
- Oil from the sump 70 is free to flow out of the sump through the recycling valve 30.
- the residual air pressure in the sump 70 forces the oil to flow out through the valve 30 and return to the engine or compressor 14 of the vehicle, thus preventing waste arid environmental damage.
- the pressure in the sump 70 diminishes, the control signal at the control port 92 is removed, and the recycling valve 30 closes.
- Figs. 9-11 illustrate an alternative embodiment in which the fixture 40 is not connected to a sump.
- the exit passage 56 through the threaded post 46 on the top surface 48 of the fixture 40 is connected to the delivery port 52.
- another means for collecting the oil condensed into droplets must be provided, instead of the sump 70 and the recycling valve 30. This alternative means would be located between the delivery port 52 of the housing fixture 40 and the air dryer 18.
- a pressure relief valve 55 (Figs. 2-4) is provided for the oil separator 10.
- the pressure relief valve 55 may be located at any point in the air flow path between the compressor 14 and the oil separator 10, and does not have to be directly attached to or form a part of the separator itself.
- the relief valve 55 is mounted on the fixture 40 of the separator 10.
- the relief valve 55 may be a commercially available pressure relief valve.
- a first end or inlet end 57 of the relief valve 55 is in fluid communication with the supply port 50 via the cross passage 53.
- a second end or outlet end 59 of the relief valve 55 projects outward of the fixture.10 to atmosphere.
- a normally closed air flow passage 61 extend between the inlet end 57 and the outlet end 59.
- the pressure rehef valve 55 is set to be activated when the supply pressure to the separator 10 as sensed at the relief valve equals or exceeds a predetermined level or set value.
- the predetermined level is based on a variety of factors. These factors include, but are not necessarily limited to, the maximum working pressure of the compressor, the volume of flow, the rating of connecting hoses or lines, and the rating of the cartridge 42.
- the predetermined value is set during manufacturing and, because the relief valve 55 as installed is tamper resistant, the set value cannot be changed.
- the predetermined value may be 225 psi, for example,
- the oil separator is not able to accept the amount of air pumped out from the compressor 60. Air pressure builds up at the supply port 50. If the air pressure reaches the predetermined maximum level, the pressure rehef valve 55 is activated, allowing air to flow out of the fixture 40 to atmosphere. This action releases the excessive pressure that might otherwise cause damage to the compressor 14 and other upstream components.
- the exiting of the compressed air through the pressure relief valve 55 creates an audible indication to the operator that the supply pressure is greater than the delivery pressure and that as a result the braking system might not function properly.
- the relief valve 55 may provide a warning signal that is electrical, for example, visually signaling the operator with a light, such as an LED, that a problem has occurred.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BRPI0416060-6A BRPI0416060A (en) | 2003-10-31 | 2004-10-29 | oil separator for vehicle air system |
MXPA06003409A MXPA06003409A (en) | 2003-10-31 | 2004-10-29 | Oil separator for vehicle air system. |
AU2004286285A AU2004286285A1 (en) | 2003-10-31 | 2004-10-29 | Oil separator for vehicle air system |
DE112004002058T DE112004002058T5 (en) | 2003-10-31 | 2004-10-29 | Oil separator for vehicle air system |
CA002539103A CA2539103A1 (en) | 2003-10-31 | 2004-10-29 | Oil separator for vehicle air system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/698,571 | 2003-10-31 | ||
US10/698,571 US7285149B2 (en) | 2003-10-31 | 2003-10-31 | Oil separator for vehicle air system |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2005042932A2 true WO2005042932A2 (en) | 2005-05-12 |
WO2005042932A3 WO2005042932A3 (en) | 2005-06-30 |
Family
ID=34550673
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2004/036034 WO2005042932A2 (en) | 2003-10-31 | 2004-10-29 | Oil separator for vehicle air system |
Country Status (8)
Country | Link |
---|---|
US (1) | US7285149B2 (en) |
CN (1) | CN1874920A (en) |
AU (1) | AU2004286285A1 (en) |
BR (1) | BRPI0416060A (en) |
CA (1) | CA2539103A1 (en) |
DE (1) | DE112004002058T5 (en) |
MX (1) | MXPA06003409A (en) |
WO (1) | WO2005042932A2 (en) |
Cited By (3)
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---|---|---|---|---|
US7285149B2 (en) | 2003-10-31 | 2007-10-23 | Bendix Commercial Vehicle Systems Llc | Oil separator for vehicle air system |
EP2641648B1 (en) | 2010-11-15 | 2019-08-21 | Nabtesco Automotive Corporation | Silencer, exhaust valve, valve device, air dryer, compressed air supply device for vehicle, and compressed air supply system |
CN112747108A (en) * | 2020-12-30 | 2021-05-04 | 苏州绿科智能机器人研究院有限公司 | Speed reducer with ventilation structure |
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DE102004022090B4 (en) * | 2004-05-05 | 2013-06-13 | Bauer-Kompressoren Heinz Bauer | Process and device for separating oil and volatile organic compounds from compressed gases of a compression plant |
DE102005062245A1 (en) * | 2005-12-24 | 2007-06-28 | Hydac Process Technology Gmbh | Gas cleaning system for dehumidifying gases comprises a unit for pre-dehumidifying the gas arranged upstream of a filtering unit |
US20080152519A1 (en) * | 2006-12-20 | 2008-06-26 | Mei-Lien Chern | Gas-oil separator with an oil type air compressor |
US7789950B2 (en) * | 2007-06-15 | 2010-09-07 | Bendix Commercial Vehicle Systems Llc | Air dryer with oil removal filter |
US7708793B2 (en) * | 2007-08-29 | 2010-05-04 | Bendix Commercial Vehicle Systems Llc | Purge exhaust processor |
CN101718267B (en) * | 2009-04-30 | 2011-09-14 | 上海加冷松芝汽车空调股份有限公司 | Compressor including oil-gas separation structure |
CN106150978B (en) | 2012-02-27 | 2020-02-28 | 纳博特斯克汽车零部件有限公司 | Oil separator |
CN104350247B (en) | 2012-02-27 | 2017-12-15 | 纳薄特斯克汽车零部件有限公司 | Oil eliminator |
EP2821604B1 (en) | 2012-02-27 | 2022-01-12 | Nabtesco Automotive Corporation | Oil separator |
IN2014MN02360A (en) | 2012-05-10 | 2015-08-14 | Nabtesco Automotive Corp | |
US9101856B2 (en) * | 2012-06-01 | 2015-08-11 | Bendix Commercial Vehicle Systems Llc | Purge exhaust processor |
EP2889484B1 (en) | 2012-07-02 | 2020-06-03 | Nabtesco Automotive Corporation | Oil separator |
JP6236596B2 (en) * | 2013-02-26 | 2017-11-29 | ナブテスコオートモーティブ株式会社 | Oil separator |
KR101637695B1 (en) * | 2014-10-16 | 2016-07-07 | 현대자동차주식회사 | Vibration type Oil Seperator and Closed Crankcase Ventilation therefor |
DE102015003163A1 (en) * | 2015-03-13 | 2016-09-29 | Mann + Hummel Gmbh | Fuel filter element and fuel filter with a front and a main filter element and with a Wasserabscheideeinheit |
DE102015003165A1 (en) * | 2015-03-13 | 2016-09-15 | Mann + Hummel Gmbh | Fuel filter with a fuel filter insert with a front and a main filter element |
DE102015003164A1 (en) * | 2015-03-13 | 2016-09-15 | Mann + Hummel Gmbh | Fuel filter element with a front and a main filter element and fuel filter |
CN106224242B (en) * | 2016-09-28 | 2018-09-14 | 长沙中联重科环境产业有限公司 | Gs-oil separator, sewage sucking system and suction-type sewer scavenger for sewage sucking system |
JP6768200B2 (en) * | 2017-06-14 | 2020-10-14 | 株式会社オートネットワーク技術研究所 | Wiring unit |
CN110466461A (en) * | 2019-07-11 | 2019-11-19 | 东风商用车有限公司 | A kind of adjustable vehicle air-channel system |
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-
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- 2003-10-31 US US10/698,571 patent/US7285149B2/en not_active Expired - Fee Related
-
2004
- 2004-10-29 DE DE112004002058T patent/DE112004002058T5/en not_active Withdrawn
- 2004-10-29 AU AU2004286285A patent/AU2004286285A1/en not_active Abandoned
- 2004-10-29 CN CNA2004800321897A patent/CN1874920A/en active Pending
- 2004-10-29 WO PCT/US2004/036034 patent/WO2005042932A2/en active Application Filing
- 2004-10-29 CA CA002539103A patent/CA2539103A1/en not_active Abandoned
- 2004-10-29 BR BRPI0416060-6A patent/BRPI0416060A/en not_active Application Discontinuation
- 2004-10-29 MX MXPA06003409A patent/MXPA06003409A/en not_active Application Discontinuation
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7285149B2 (en) | 2003-10-31 | 2007-10-23 | Bendix Commercial Vehicle Systems Llc | Oil separator for vehicle air system |
EP2641648B1 (en) | 2010-11-15 | 2019-08-21 | Nabtesco Automotive Corporation | Silencer, exhaust valve, valve device, air dryer, compressed air supply device for vehicle, and compressed air supply system |
CN112747108A (en) * | 2020-12-30 | 2021-05-04 | 苏州绿科智能机器人研究院有限公司 | Speed reducer with ventilation structure |
Also Published As
Publication number | Publication date |
---|---|
MXPA06003409A (en) | 2006-06-27 |
CA2539103A1 (en) | 2005-05-12 |
CN1874920A (en) | 2006-12-06 |
AU2004286285A1 (en) | 2005-05-12 |
DE112004002058T5 (en) | 2006-11-09 |
US7285149B2 (en) | 2007-10-23 |
WO2005042932A3 (en) | 2005-06-30 |
US20050092180A1 (en) | 2005-05-05 |
BRPI0416060A (en) | 2007-01-02 |
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