WO2012138623A1 - Pistolet de distribution de carburant ayant une vanne de décharge de capuchon pour orvr - Google Patents

Pistolet de distribution de carburant ayant une vanne de décharge de capuchon pour orvr Download PDF

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Publication number
WO2012138623A1
WO2012138623A1 PCT/US2012/031940 US2012031940W WO2012138623A1 WO 2012138623 A1 WO2012138623 A1 WO 2012138623A1 US 2012031940 W US2012031940 W US 2012031940W WO 2012138623 A1 WO2012138623 A1 WO 2012138623A1
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WO
WIPO (PCT)
Prior art keywords
vapor
fuel
return passage
passage
valve
Prior art date
Application number
PCT/US2012/031940
Other languages
English (en)
Inventor
David Bolt
Original Assignee
Veeder-Root 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 Veeder-Root Company filed Critical Veeder-Root Company
Publication of WO2012138623A1 publication Critical patent/WO2012138623A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
    • B67D7/04—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes for transferring fuels, lubricants or mixed fuels and lubricants
    • B67D7/0476—Vapour recovery systems
    • B67D7/0478—Vapour recovery systems constructional features or components
    • B67D7/0492—Vapour storing means, e.g. dedicated ullage spaces, separate tanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
    • B67D7/04—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes for transferring fuels, lubricants or mixed fuels and lubricants
    • B67D7/0476—Vapour recovery systems
    • B67D7/0478—Vapour recovery systems constructional features or components
    • B67D7/048—Vapour flow control means, e.g. valves, pumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
    • B67D7/06—Details or accessories
    • B67D7/42—Filling nozzles
    • B67D7/54—Filling nozzles with means for preventing escape of liquid or vapour or for recovering escaped liquid or vapour

Definitions

  • the present invention generally relates to the recovery of fuel vapor in connection with a liquid fuel dispensing facility. More particularly, the present invention relates to the recovery of fuel vapor during fueling operations for both onboard refueling vapor recovery (ORVR) vehicles and non-ORVR vehicles.
  • ORVR onboard refueling vapor recovery
  • Liquid fuel dispensing facilities i.e. gasoline stations
  • Liquid fuel dispensing facilities i.e. gasoline stations
  • Attempts to minimize losses to the atmosphere have prompted various vapor recovery methods.
  • Stage-I vapor recovery in which vapor from underground fuel storage tanks that are receiving fuel is returned to the delivery truck; “Stage-II vapor recovery” in which vapor from a vehicle that is being refueled is returned to the underground storage tank; vapor processing where the fuel/air vapor mix from the underground storage tank is liquefied and returned as liquid fuel to the underground storage tank; and other fuel/air mix separation methods.
  • Stage-II vapor recovery results in equal exchanges of air or vapor (A) and liquid (L) between the main fuel storage tank and the consumer's fuel tank.
  • Stage-II vapor recovery produces an A/L ratio very close to 1.0.
  • returned vapor replaces an equal amount of liquid in the main fuel storage tank during refueling transactions. This minimizes losses at the fuel dispensing nozzle and evaporation and leakage of excess vapor from the storage tank.
  • Onboard, or vehicle-carried, fuel vapor recovery and storage systems (commonly referred to as onboard refueling vapor recovery, or ORVR) have been developed in which the head space in the vehicle fuel tank is vented through a charcoal-filled canister so that the vapor is adsorbed by the charcoal. Subsequently, the fuel vapor is withdrawn from the canister into the engine intake manifold for mixture and combustion with the normal fuel and air mixture.
  • ORVR onboard refueling vapor recovery
  • the apertures 6 in the nozzle's boot 4 may help avoid nuisance shut-offs when fueling ORVR vehicles, they create additional issues. As noted, the apertures 6 help prevent nuisance shut-offs by allowing air to be drawn into the control volume created by sealing boot 4, thereby reducing the vacuum level within the control volume. As shown in Figure 3B, this reduction in the vacuum level to a value such as (Pxz) may result in the ORVR vapor valve 8 remaining open since the vacuum level does not reach the value at which the vapor valve trips shut (PA). AS such, at least a portion of the air drawn into the control volume through the apertures 6 is ingested into the fuel storage tank system.
  • One embodiment of the present invention provides a vapor recovery system that recovers vapor expelled from a fuel tank of a vehicle receiving fuel through a fuel supply passage and returns the vapor to an underground storage tank through a vapor return passage in a service station environment.
  • the system includes fuel nozzle in fluid communication with the fuel supply passage and the vapor return passage, the fuel nozzle including a boot configured to form a seal with the fuel tank, a vapor passage valve configured to prevent the flow of vapor through the vapor return passage when the vapor passage valve is in a closed position, the vapor passage valve being configured to move to the closed position from an open position at a first vacuum level within the vapor return passage, and a relief valve configured to allow air into the vapor return passage at a second vacuum level within the vapor return passage, wherein the second vacuum level is more negative than the first vacuum level.
  • Another embodiment of the present invention provides a fuel nozzle for use with a vapor recovery system that recovers vapor expelled from a fuel tank of a vehicle through a fuel supply passage and returns the vapor to an underground storage tank through a vapor return passage in a service station environment.
  • the fuel nozzle includes a nozzle body in fluid communication with the fuel supply passage and the vapor return passage, a boot disposed on the fuel nozzle body, the boot being in fluid communication with the vapor return passage and configured to form a seal with the fuel tank, a vapor passage valve configured to move from an open position to a closed position at a first vacuum level within the vapor return passage, thereby preventing the flow of vapor through the vapor return passage, and a relief valve configured to allow air into the vapor return passage at a second vacuum level within the vapor return passage, wherein the second vacuum level is more negative than the first vacuum level.
  • Yet another embodiment of the present invention provides a fuel nozzle for use with a vapor recovery system that recovers vapor expelled from a fuel tank of a vehicle through a fuel supply passage and returns the vapor to an underground storage tank through a vapor return passage in a service station environment.
  • the fuel nozzle includes a nozzle body in fluid communication with the fuel supply passage and the vapor return passage, a boot disposed on the fuel nozzle body, the boot being in fluid communication with the vapor return passage and configured to form a seal with the fuel tank, a fuel nozzle valve configured to prevent the flow of fuel through the fuel supply passage when the fuel nozzle valve is in a closed position, the fuel nozzle valve being configured to move to the closed position from an open position at a first vacuum level within the vapor return passage, a relief valve configured to allow air into the vapor return passage at a second vacuum level within the vapor return passage, wherein the second vacuum level is less negative than the first vacuum level.
  • Figure 1 illustrates a prior art fuel nozzle including air flow apertures found in a boot of the fuel nozzle
  • Figure 2 is a diagrammatic representation of a control volume formed by a boot of the prior art nozzle shown in Figure 1 when refueling a vehicle;
  • Figures 3A through 3C illustrate the effects the air flow apertures of the fuel nozzle shown in Figure 1 have on the pressure levels within the control volume shown in Figure 2 when refueling both ORVR and non-ORVR vehicles with the fuel nozzle shown in Figure 1 ;
  • Figure 4 is a diagrammatic representation of a liquid fuel dispensing facility including a fuel vapor recovery system including fuel nozzle in accordance with a first embodiment of the present invention;
  • Figure 5 is a diagrammatic representation of the fuel dispenser shown in Figure 4 refueling a vehicle
  • Figure 6 illustrates a fuel nozzle including a relief valve in accordance with a first embodiment of the present invention
  • Figures 7A and 7B are cross-sectional views of an ORVR vapor passage valve of the fuel dispenser shown in Figures 5 and 6 in the open and closed positions, respectively;
  • Figure 8 is diagrammatic representation of a control volume formed by a boot of the fuel nozzle shown in Figure 6 while refueling a vehicle;
  • Figure 9 illustrates the relationships between expected pressure levels within the control volume shown in Figure 8 when refueling both ORVR and non-ORVR vehicles with the fuel nozzle shown in Figure 6.
  • FIG. 4 shows a vapor recovery system for use in a liquid fuel dispensing facility 10, in accordance with the present invention.
  • the fuel dispensing facility 10 includes a station house 100, one or more fuel dispenser units 200a and 200b (fuel dispenser unit 200b is not shown), a main fuel storage system 300, and means for connecting the fuel dispenser units 200a and 200b to the main fuel storage system 300.
  • the fuel dispenser units 200a and 200b may be the ENCORE ® sold by Gilbarco Inc. of Greensboro, North Carolina, or other fuel dispenser, such as that disclosed in U.S. Patent No. 4,978,029, which is hereby incorporated by reference in its entirety.
  • the station house 100 includes a central electronic control system 110 that includes a dispenser controller 120 (also known as a site controller or point-of-sale system), dispenser current loop interface wiring 130, and a data acquisition system 140.
  • the dispenser controller 120 controls the fuel dispenser units 200a and 200b and processes transaction information received from the dispensers 200a and 200b over the current loop 130.
  • the dispenser controller 120 is in electrical communication with the data acquisition system 140 by a first wiring bus 122.
  • the interface wiring 130 may be electrically connected to the data acquisition system 140 by a second wiring bus 132.
  • the dispenser controller 120 may be the Gilbarco G-Site ® or Passport ® point-of-sale system.
  • the data acquisition system 140 preferably includes standard computer storage and central processing capabilities, keyboard input device(s), and audio and visual output interfaces among other conventional features.
  • the data acquisition system 140 may be the Veeder-Root Company TLS-350TM tank monitor.
  • Both the dispenser controller 120 and the data acquisition system 140 may be further communicatively coupled to an off- site or remote system (not shown) for communicating information and receiving instructions remotely, in which case both systems may communicate with the remote system over telephone lines or other network lines, including the Internet.
  • the fuel dispenser units 200a and 200b may be provided in the form of conventional "gas pumps. " Each of the fuel dispenser units 200a and 200b may include one or more fuel dispensing points typically defined by fuel nozzles 210.
  • the fuel nozzles 210 are vapor recovery nozzles including a nozzle body 214, a flexible boot 218, a fuel spout 219, a fuel nozzle valve 226, an ORVR vapor passage valve 294 and at least one relief valve 290 and 290a.
  • the boot 218 is disposed on the front end of the nozzle body 214 and is disposed about the fuel spout 219.
  • the boot 218 is in fluid communication with a vapor return passage 220 defined by the nozzle body 214 and is flexible so that it may form a seal, and corresponding control volume (Figure 8), with a fuel neck 25 of a vehicle 12 that is being refueled.
  • the fuel nozzle valve 226 is manually operated by a user to selectively allow fuel to flow through a fuel supply passage 230 defined by the nozzle body 214. Additionally, the fuel nozzle valve 226 is configured to close automatically, thereby preventing the flow of fuel through the fuel supply passage 230, when a threshold vacuum level (PB) ( Figure 9) is reached within the control volume defined by the boot 218, as discussed in greater detail below.
  • PB threshold vacuum level
  • ORVR vapor passage valves 294 are used in combination with the respective fuel nozzles 210 so the nozzles can detect when ORVR vehicles are being refueled. More specifically, each ORVR vapor passage valve 294 is configured to move from an open position (Figure 7A) to a closed position ( Figure 7B), thereby preventing the flow of vapor through vapor return passage 220, when a threshold vacuum level (PA) ( Figure 9) is reached within the control volume defined by the boot 218, as discussed in greater detail below.
  • the ORVR vapor passage valve 294 is a diaphragm operated valve wherein a diaphragm 295 moves a plunger 296 dependent upon the vacuum level sensed in the control volume through port 297.
  • each nozzle 210 includes at least one relief valve 290 in fluid communication with the vapor return passage 220 of the dispenser and atmosphere.
  • the relief valve 290 is disposed on the nozzle body 214.
  • the relief valve 290a is shown as an alternate position in which the valve is mounted on the boot 218.
  • the relief valve 290 is configured to open automatically when a threshold vacuum level (PRV) ( Figure 9) is reached within the control volume defined by the boot 218. While open, the relief valve 290 allows air to be drawn into the control volume, thereby reducing the vacuum level, as discussed in greater detail below.
  • the relief valve 290 is an umbrella-type valve in which the edges of a molded diaphragm lift at the design threshold vacuum level (PRV) allowing air flow. Alternate embodiments may include poppet-type valves and spring and ball arrangements.
  • each fuel dispensing point of the fuel dispenser units 200a and 200b includes a blend manifold 260, a coaxial vapor/liquid splitter 261 , a vapor return passage 220, a fuel supply passage 230 and a mechanical A/L regulator valve 500.
  • the mechanical A/L regulator valve 500 is preferably disposed adjacent the coaxial vapor/liquid splitter 261.
  • the vapor return passages 220 may be joined together before connecting with a common vapor return pipe 410 ( Figure 4).
  • the fuel dispenser units 200a and 200b also include liquid fuel dispensing meters 240.
  • the liquid fuel dispensing meters 240 provide dispensed liquid fuel quantity information to the dispenser controller 120 via a liquid fuel dispensing meter interface 270, or control system, and interface wiring 130.
  • the control system 270 may be a microcontroller, a microprocessor, or other electronics with associated memory and software programs running thereon.
  • the control system 270 typically controls aspects of the fuel dispenser units 200a and 200b, such as a gallons (or liters) display 215, a price display 216, receipt of payment transactions, and the like, based on fuel flow information received from the liquid fuel dispensing meters 240 via pulses 241.
  • the main fuel storage system 300 includes one or more main fuel storage tanks 310a and 310b (tank 310b is not shown).
  • the fuel storage tanks 310a and 310b are typically provided underground, however, underground placement of the tank is not required for application of the invention.
  • each fuel storage tank 310a and 310b is connected to the atmosphere by a vent pipe 320.
  • the vent pipe 320 terminates in a pressure relief valve 330.
  • a vapor processor 340 may be connected to the vent pipe 320 intermediate of the fuel storage tanks 310a and 310b and the pressure relief valve 330.
  • a vapor processor is not typically required in locations that are not subject to enhanced monitoring requirements.
  • a pressure sensor 350 is operatively connected to the vent pipe 320.
  • the fuel storage tanks 310a and 310b may also include an Automatic Tank Gauging System (ATGS) 360 used to provide information regarding the fuel level in the storage tanks.
  • ATGS Automatic Tank Gauging System
  • the vapor processor 340, the pressure sensor 350, and the automatic tank gauging system 360 are electrically connected to the data acquisition system 140 by third, fourth, and fifth wiring busses 342, 352, and 362, respectively.
  • the fuel storage tanks 310a and 310b also include a fill pipe and fill tube 370 to provide a means to fill the tanks with fuel and a submersible pump 380 to supply the dispensers 200a and 200b with fuel from the storage tanks 310a and 310b.
  • the means for connecting the fuel dispenser units 200a and 200b and the main fuel storage system 300 includes a vapor return pipeline 410 and one or more fuel supply pipelines 420.
  • the vapor return pipeline 410 and the fuel supply pipelines 420 are connected to the vapor return passages 220 and fuel supply passages 230, respectively, associated with multiple fuel dispensing points 210.
  • Fuel supply pipelines 420 may be double-walled pipes having secondary containment, as is well known.
  • An exemplary underground fuel delivery system is illustrated in U.S. Patent No. 6,435,204, which is hereby incorporated by reference in its entirety.
  • variable speed vapor pump 250 controlled by a motor 252 is coupled to the plurality of vapor return passages 220 by way of the common vapor return pipeline 410 to assist in the recovery of fuel vapor.
  • variable speed vapor pump 250 may be the Healy VP1200 ® .
  • the data acquisition system 140 controls the motor 252, via a control line 251 , to control the speed of the vapor pump 250.
  • fuel travels from one or more of underground fuel storage tanks 310a and 310b by way of fuel supply pipelines 420 associated with their respective underground storage tank.
  • the fuel supply pipelines 420 pass into the housing 202 of the fuel dispenser unit 200a through shear valves 421 ( Figure 5).
  • the shear valves 421 are designed to cut off fuel flowing through their respective fuel supply pipelines 420 if the fuel dispenser unit 200 is impacted, as is commonly known in the industry.
  • An exemplary embodiment of a shear valve is disclosed in U.S. Patent No. 6,575,206, which is hereby incorporated by reference in its entirety.
  • vapor return passage 220 passes out of the fuel dispenser unit 200a through a shear valve 221 ( Figure 5).
  • the fuel flow paths from the underground fuel storage tanks 310a and 310b to the fuel nozzle 210 each include a fuel filter 246 and a proportional valve 244 positioned along the fuel line 230.
  • the liquid fuel dispensing meter 240 communicates via a pulser signal line from pulser 241 to the control system 270.
  • the control system 270 regulates the proportional valve 244, via a valve communication line, to open and close during fueling operations.
  • the proportional valve 244 may be a proportional solenoid controlled valve, such as described in U.S. Patent No. 5,954,080, which is incorporated herein by reference in its entirety.
  • the control system 270 directs the proportional valve 244 to open to allow increased fuel flow, the fuel enters the proportional valve 244 and exits into the liquid fuel dispenser meter 240.
  • the flow rate of the displaced volume of the fuel is measured by the liquid fuel dispenser meter 240 which communicates the flow rate of the displaced volume of fuel to the control system 270 via the pulser signal line.
  • a pulse signal is generated on the pulser signal line in the example illustrated, such as by a Hall-effect sensor as described in U.S. Patent No. 7,028,561 , which is incorporated herein by reference in its entirety.
  • the control system 270 uses the pulser signal from the pulser signal line to determine the flow rate of fuel flowing through the fuel dispenser unit 200a and being delivered to the vehicle 12.
  • the control system 270 updates the total gallons dispensed on the gallons display 215 via a gallons display communication line, as well as the cost of fuel dispensed on the price display 216 via a price display communication line.
  • the fuel in this case enters a flow switch 242.
  • the flow switch 242 generates a signal to the control system 270 to communicate that fuel is actually flowing in the fuel delivery path and that subsequent pulser signals from liquid fuel dispensing meter 240 are due to actual fuel flow.
  • the blend manifold 260 receives fuels of varying octane values from the various underground fuel storage tanks 310a and 310b and ensures that fuel of the octane level selected by the consumer is delivered to the consumer's vehicle 12.
  • the fuel passes through the fuel hose 212 and fuel nozzle 210 for delivery into the fuel tank 24 of the vehicle 12.
  • Flexible fuel hose 212 includes the fuel supply passage 230 and the vapor return passage 220. Both passages 230 and 220 are fluidly connected to the underground fuel storage tanks 310a and 310b through the fuel dispenser unit 200a, as previously discussed.
  • the vapor return passage 220 is separated from the fuel supply passage 230 by the coaxial vapor /liquid splitter 261.
  • a user inserts the fuel spout 219 of the fuel nozzle 210 into a fill neck 25 of the vehicle's fuel tank 24.
  • the boot 218 of the fuel nozzle 210 forms a seal with a portion of the fill neck 25, thereby creating a control volume, as shown in Figure 8.
  • the pressure level within the control volume is impacted by various factors, such as the rate of fuel delivery into the fuel tank 24, the quality of the seal formed by the boot 218, automatic fuel shut-off sensor flow, whether or not the vehicle 12 being refueled is an ORVR or non-ORVR vehicle, etc.
  • the greatest effect on the pressure within the control volume is caused by the fuel dispenser's vapor recovery system, when a non-ORVR vehicle is being refueled, or the two vapor recovery systems, when an ORVR vehicle is being refueled, which can increase the vacuum level (pressure becomes more negative) in the control volume beyond the desired level.
  • the incoming fuel displaces air in the fuel tank 24 containing fuel vapor.
  • vapor is recovered from the fuel tank 24 of the vehicle 12 through the vapor return passage 220 with the assistance of the vapor pump 250 ( Figure 4).
  • the vapor pump 250 of the present embodiment is a variable speed pump.
  • the data acquisition system 140 controls the speed of the vapor pump 250, and therefore the pressure level, or vacuum, within the common vapor return pipeline 410 and associated vapor return passage 220.
  • the flowing fuel causes the mechanical A/L regulator valve 500 to open, thereby opening the vapor return passage 220 to the controlled volume created by the seal between the nozzle boot 18 and the fill neck 25 of the fuel tank 24.
  • the relief valve 290 of the fuel nozzle 210 is configured to allow air to flow into the control volume at the vacuum threshold value (PRV) that is selected to be between the vacuum threshold values (PA) and (PB) of the ORVR vapor passage valve 294 and the automatic fuel shut-off feature, respectively.
  • PRV vacuum threshold value
  • PA vacuum threshold values
  • PB vacuum threshold values
  • the relief valve 290 allows ambient air to flow into the control volume, thereby reducing the vacuum level and avoiding nuisance shut-offs.
  • the operation of the relief valve 290 does not adversely affect the automatic fuel shut-off feature since only a limited amount of air flow into the control volume occurs when the relief valve 290 is open.
  • the relief valve 290 does not adversely affect this desired vacuum level within the control volume since it does not allow air to flow freely into the control volume, but rather, only after the vacuum reaches a level that indicates the vehicle being refueled is actually an ORVR vehicle rather than a non- ORVR vehicle.
  • variable speed vapor pumps can be replaced with various types of fixed speed pumps.
  • electronic proportional valves can be disposed on the upstream side of various fixed speed pumps and used to selectively control the pressure that is maintained on the downstream side of an associated A/L regulator valve.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)

Abstract

L'invention porte sur un système de récupération de vapeur, lequel système récupère une vapeur expulsée à partir d'un réservoir de carburant d'un véhicule recevant un carburant par l'intermédiaire d'un passage d'alimentation en carburant et renvoie la vapeur vers un réservoir de stockage souterrain par l'intermédiaire d'un passage de retour de vapeur comprenant une buse de carburant en communication fluidique avec le passage d'alimentation en carburant et le passage de retour de vapeur, la buse de carburant comprenant un capuchon configuré de façon à former un joint d'étanchéité avec le réservoir de carburant, une vanne de passage de vapeur configurée de façon à empêcher l'écoulement de vapeur à travers le passage de retour de vapeur lorsque la vanne de passage de vapeur est dans une position fermée, la vanne de passage de vapeur étant configurée de façon à se déplacer vers la position fermée à partir d'une position ouverte à un premier niveau de vide, et une vanne de décharge configurée de façon à admettre de l'air dans le passage de retour de vapeur à un second niveau de vide, le second niveau de vide étant plus négatif que le premier niveau de vide.
PCT/US2012/031940 2011-04-07 2012-04-03 Pistolet de distribution de carburant ayant une vanne de décharge de capuchon pour orvr WO2012138623A1 (fr)

Applications Claiming Priority (2)

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US201161472719P 2011-04-07 2011-04-07
US61/472,719 2011-04-07

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WO2012138623A1 true WO2012138623A1 (fr) 2012-10-11

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104598733A (zh) * 2015-01-22 2015-05-06 亚普汽车部件股份有限公司 一种建立orvr加油管液体密封的方法
EP3647260A1 (fr) * 2018-10-30 2020-05-06 Elaflex Hiby Tanktechnik GmbH & Co. Dispositif d'aller et de retour de fluides

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5676181A (en) * 1996-03-20 1997-10-14 Healy Systems, Inc. Vapor recovery system accommodating ORVR vehicles
US6923221B2 (en) * 2003-12-04 2005-08-02 Gilbarco Inc. Vapor recovery system with ORVR compensation
US7174926B1 (en) * 2003-10-10 2007-02-13 Vapor Systems Technologies, Inc. Vapor recovery system with improved ORVR compatibility and performance
US7509982B2 (en) * 2003-10-10 2009-03-31 Vapor Systems Technologies, Inc. Vapor recovery system with improved ORVR compatibility and performance
US7909069B2 (en) * 2006-05-04 2011-03-22 Veeder-Root Company System and method for automatically adjusting an ORVR compatible stage II vapor recovery system to maintain a desired air-to-liquid (A/L) ratio

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5676181A (en) * 1996-03-20 1997-10-14 Healy Systems, Inc. Vapor recovery system accommodating ORVR vehicles
US7174926B1 (en) * 2003-10-10 2007-02-13 Vapor Systems Technologies, Inc. Vapor recovery system with improved ORVR compatibility and performance
US7509982B2 (en) * 2003-10-10 2009-03-31 Vapor Systems Technologies, Inc. Vapor recovery system with improved ORVR compatibility and performance
US6923221B2 (en) * 2003-12-04 2005-08-02 Gilbarco Inc. Vapor recovery system with ORVR compensation
US6941978B2 (en) * 2003-12-04 2005-09-13 Gilbarco Inc. Vapor recovery system with ORVR compensation
US7909069B2 (en) * 2006-05-04 2011-03-22 Veeder-Root Company System and method for automatically adjusting an ORVR compatible stage II vapor recovery system to maintain a desired air-to-liquid (A/L) ratio

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104598733A (zh) * 2015-01-22 2015-05-06 亚普汽车部件股份有限公司 一种建立orvr加油管液体密封的方法
EP3647260A1 (fr) * 2018-10-30 2020-05-06 Elaflex Hiby Tanktechnik GmbH & Co. Dispositif d'aller et de retour de fluides
WO2020089161A1 (fr) 2018-10-30 2020-05-07 Elaflex Hiby Tanktechnik Gmbh & Co. Kg Dispositif de distribution et de retour de fluides
AU2019370856B2 (en) * 2018-10-30 2022-03-03 Elaflex Hiby Gmbh & Co. Kg Device for discharging and returning fluids
US11505448B2 (en) 2018-10-30 2022-11-22 Elaflex Hiby Gmbh & Co. Kg Device for discharging and returning fluids

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