EP0987215A2 - Pompe à essence - Google Patents

Pompe à essence Download PDF

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Publication number
EP0987215A2
EP0987215A2 EP99850136A EP99850136A EP0987215A2 EP 0987215 A2 EP0987215 A2 EP 0987215A2 EP 99850136 A EP99850136 A EP 99850136A EP 99850136 A EP99850136 A EP 99850136A EP 0987215 A2 EP0987215 A2 EP 0987215A2
Authority
EP
European Patent Office
Prior art keywords
fuel
flow
containers
delivery nozzle
dispenser
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP99850136A
Other languages
German (de)
English (en)
Other versions
EP0987215A3 (fr
Inventor
Bengt Larsson
Viveka Svensson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wayne Fueling Systems Sweden AB
Original Assignee
Dresser Wayne AB
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 Dresser Wayne AB filed Critical Dresser Wayne AB
Publication of EP0987215A2 publication Critical patent/EP0987215A2/fr
Publication of EP0987215A3 publication Critical patent/EP0987215A3/fr
Withdrawn legal-status Critical Current

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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
    • 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
    • B67D7/08—Arrangements of devices for controlling, indicating, metering or registering quantity or price of liquid transferred
    • 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
    • B67D7/74—Devices for mixing two or more different liquids to be transferred
    • B67D7/743—Devices for mixing two or more different liquids to be transferred electrically or electro-mechanically operated
    • B67D7/744—Devices for mixing two or more different liquids to be transferred electrically or electro-mechanically operated involving digital counting

Definitions

  • the present invention relates to a fuel dispenser for dispensing liquid fuel according to the preamble to claim 1.
  • fuel dispensers or fuel pumps in connection with one or more fuel containers for dispensing liquid fuel to fuel tanks of motor vehicles.
  • the fuel is stored in the fuel container, which is connected to the fuel dispenser/ fuel pump by means of a conduit.
  • the difference between fuel dispensers and fuel pumps is that the latter have a built-in pump and valves for controlling the flow of fuel whereas dispensers have only valves for controlling the flow of fuel.
  • the flow of fuel must be produced by there being a pump in connection with each one of the fuel containers.
  • fuel dispenser will be used in the following for both fuel pump and fuel dispenser.
  • the dispenser can be arranged so that fuel can be dispensed to one or more delivery nozzles simultaneously.
  • delivery nozzles are arranged on two sides of the dispenser and can be used simultaneously.
  • one delivery nozzle is arranged for each grade of fuel.
  • a flow control means which controls the flow from the fuel container to the delivery nozzle and a flow meter connected to a display unit.
  • the flow meter used to meter the dispensed amount of fuel must be accurate in order to satisfy the requirements issued by the authorities as to the dispensing of fuel at a petrol station.
  • the accuracy requirements placed on the flow meter are different in different countries.
  • the accuracy of a flow meter can be measured, for instance, by filling a container with a given amount of fuel at three different flow rates. The three different flow rates selected are the maximum flow rate for which the flow meter is intended, a tenth of the maximum flow rate and a flow rate between the two flow rates mentioned.
  • the accuracy requirement usually is that the metered amount of fuel be not allowed to deviate by more than 0.5%, preferably not by more than 0.25% from the actual one as the fuel dispenser is supplied from factory. This makes an accurate and, thus, expensive flow meter necessary. In many countries, the flow meter must also be calibrated each year, which causes an additional cost.
  • an accurate flow meter is thus meant a flow meter in which the metered flow rate deviates by at most 0.5%, preferably at most 0.25%, from the actual flow, within a range between the maximum flow rate for which the flow meter is intended and a tenth of the maximum flow rate.
  • the accuracy must be kept in the range of 4-40 1/min.
  • a less accurate flow meter has inferior accuracy.
  • gas recirculation from the delivery nozzle is desired in order to minimise the fuel vapour in the vicinity of the delivery nozzle.
  • Gas recirculation requires a gas pump which should be operated at a speed which is proportional to the flow of fuel. This is usually done by regulating the gas pump according to the flow of fuel. This necessitates control equipment for the gas pump.
  • petrol with different octane numbers is supplied, such as three octane numbers.
  • the petrol from the two containers is mixed.
  • a dispenser which is arranged to permit mixing of petrol from two containers has a flow control means and a flow meter between each of the containers and the delivery nozzle.
  • the flow control means are connected to a display unit and a control unit.
  • the control unit receives signals about the size of the flow from the flow meters, and then uses these signals to control the flow control means so as to produce the correct octane number.
  • the control unit receives signals about the size of the flow from the flow meters, and then uses these signals to control the flow control means so as to produce the correct octane number.
  • An object of the present invention is to provide a fuel dispenser for a petrol station and a method therefor, which allows controlled mixing of fuel from different containers with reduced costs for installation and maintenance compared with prior art fuel dispensers.
  • a further object of the present invention is to provide a fuel dispenser for a petrol station, in which the number of accurate flow meters has been minimised.
  • a fuel dispenser according to the invention enables mixing of fuel from different fuel containers.
  • the inventive fuel dispenser further has the advantage that only one flow meter which meters the total flow through a delivery nozzle need to be so accurate as to satisfy the requirements issued by the authorities in respect of the totally dispensed quantity.
  • the flow meters which meter the separate flow from a fuel container need only have such accuracy as to satisfy the accuracy requirements as to mixing proportions of fuel from different containers. This means that the flow meters which meter the separate flow from a fuel container can be less accurate and, consequently, less expensive than the flow meter metering the total flow through a delivery nozzle.
  • a flow of fuel is fed from one of the containers or both at the same time, through the accurate flow meter.
  • the less accurate flow meter is connected between the second container and the accurate flow meter.
  • the flow of fuel from the first container can be determined by the difference between the accurate flow meter and the less accurate flow meter and, as a result, the mixing proportions can be determined while at the same time only one accurate flow meter is required.
  • three different grades of fuel can be supplied from two fuel containers while at the same time only one accurate flow meter for each delivery nozzle is required.
  • a gas pump can be arranged in connection with the accurate flow meter and be operated by the motion thereof.
  • the gas pump pumps at a speed which is proportional to the fuel flow rate independently of whether the fuel comes from one of the containers or both simultaneously.
  • no control equipment and only one gas pump is required.
  • the fuel dispenser may comprise further fuel containers and associated less accurate flow meters. There is thus at least one less accurate flow meter for all fuel containers except one, which permits controlling of the mixing proportions of fuel from the fuel containers in all combinations.
  • the flow meters that meter the total flow of fuel to a delivery nozzle are calibrated. This means a great saving compared with the case where all flow meters are calibrated.
  • the requirements issued by the authorities as to the maximum intervals between calibrations vary from country to country. Also the accuracy requirements that the totally dispensed amount must satisfy vary from country to country.
  • the calibration of the flow meter metering the total flow of fuel through the delivery nozzle is carried out sufficiently frequently to satisfy the requirements issued by the authorities in the country where the fuel dispenser is placed.
  • Fig. 1 is a schematic view of a fuel dispenser according to a preferred embodiment of the present invention for dispensing liquid fuel, said fuel dispenser comprising two delivery nozzles and two fuel containers.
  • Fig. 2 is a schematic view of a fuel dispenser according to an alternative embodiment of the present invention for dispensing liquid fuel, said fuel dispenser comprising three delivery nozzles and three fuel containers.
  • Fig 3 is a schematic view of a fuel dispenser according to an alternative embodiment of the present invention for dispensing liquid fuel, said fuel dispenser comprising two delivery nozzles and two fuel containers.
  • a first and a second fuel container 1, 2 are connected to associated pumps 3, 4.
  • the first fuel container 1 is connected to a first accurate flow meter 5 via a flow control means in the form of a first valve 6.
  • the first accurate flow meter is also connected to a first delivery nozzle 7.
  • the second fuel container 2 is connected to a first less accurate flow meter 8.
  • the less accurate flow meter is also connected to the first accurate flow meter via a flow control means in the form of a second valve 9.
  • a second accurate flow meter 10 is connected to the first fuel container via a flow control means in the form of a third valve 11 and to the first less accurate flow meter via a flow control means in the form of a fourth valve 12.
  • the second accurate flow meter is connected to a second delivery nozzle 13.
  • a control means 14 receives signals from the flow meters 5, 8, 10 about the current flow via signal lines 15.
  • the control means also controls via control lines 16 the valves 6, 9, 11, 12, which are controllable either by being partially throttled or by being open only for short periods. In the latter case, the flow is regulated by varying the ratio of the time the valve is open to the time the valve is closed. The pulsing of the valve is carried out so quickly that it can be resembled to throttling of the flow.
  • the control means controls the valves so that each delivery nozzle is supplied with fuel from one of the fuel containers or both simultaneously.
  • the desired octane number is supplied through an input 17.
  • the flow of fuel through the less accurate flow meter 8 will be divided into two flows through the second and the fourth valve 9, 12, respectively. Since the different flows through the second and the fourth valve 9, 12 are not metered but only the sum thereof is metered, the regulation of the mixing proportions in the delivery nozzles is dependent on the fact that the flow as a function of the throttling of the valves is known, or alternatively the flow as a function of the relative time interval when the valves are open. Data about the flow of the valves as a function of the throttling are stored in the control means. An accuracy in the division between the two flows which is within the limits stipulated by the authorities can be achieved by means of ordinary valves.
  • a gas pump 18 is arranged in connection with each accurate flow meter and is operated by the motion thereof.
  • a gas conduit is arranged between each delivery nozzle and the associated gas pump, each gas pump in turn being connected to at least one of the fuel containers. In this manner gas is pumped from the delivery nozzles at a speed which is proportional to the flow rate of the fuel.
  • a fuel dispenser according to the preferred embodiment as described above eliminates the need for an accurate flow meter for each fuel container and each delivery nozzle, which results in reduced costs.
  • the two delivery nozzles can be arranged on different sides of a fuel dispenser.
  • the second delivery nozzle 13 can be omitted, which is equivalent to closing the third and the forth valve 11, 12.
  • the number of nozzles is only limited by the requisite accuracy of the mixed fuel, which in turn is determined by the accuracy in the throttling of the different valves.
  • Fig. 2 shows a variant of the preferred embodiment of the present invention, which has two less accurate flow meters 8', 8".
  • One of the two less accurate flow meters 8' is arranged between the second fuel container 2 and the first delivery nozzle 7, for metering the flow of fuel from the second fuel container 2 to the first delivery nozzle 7.
  • the other of the two less accurate flow meters 8" is arranged between the second fuel container 2 and the second delivery nozzle 13, for metering the flow of fuel from the second fuel container 2 to the second delivery nozzle 13.
  • FIG. 3 An alternative embodiment of the present invention is illustrated in Fig. 3, which comprises also a third fuel container 19 and a third pump 20, a fifth valve 21 and a sixth valve 22, and a second less accurate flow meter 23.
  • the mixing proportions of fuel from the three different fuel containers to the associated delivery nozzle are controlled by the control means receiving signals from the three flow meters and controlling the valves so as to obtain the desired mixing proportions.
  • a central pump is arranged for each fuel container, but alternatively one pump for each delivery nozzle or for each dispenser can be arranged for each fuel container.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)
EP99850136A 1998-09-17 1999-09-16 Pompe à essence Withdrawn EP0987215A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9803150A SE517869C2 (sv) 1998-09-17 1998-09-17 Bränsledispenser
SE9803150 1998-09-17

Publications (2)

Publication Number Publication Date
EP0987215A2 true EP0987215A2 (fr) 2000-03-22
EP0987215A3 EP0987215A3 (fr) 2000-08-09

Family

ID=20412621

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99850136A Withdrawn EP0987215A3 (fr) 1998-09-17 1999-09-16 Pompe à essence

Country Status (2)

Country Link
EP (1) EP0987215A3 (fr)
SE (1) SE517869C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002023138A1 (fr) * 2000-09-15 2002-03-21 Bp Oil International Limited Distributeur et procede d'utilisation associe

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5630528A (en) 1995-01-27 1997-05-20 Gilbarco, Inc. Method and apparatus for metering and dispensing fluid, particulary fuel

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5163586A (en) * 1990-01-30 1992-11-17 Additive Systems Inc. Automotive fuel additive dispensing and blending system
GB2264692B (en) * 1992-03-06 1995-01-25 Castrol Ltd Liquid dispensing systems
US5469830A (en) * 1995-02-24 1995-11-28 The Cessna Aircraft Company Fuel blending system method and apparatus
DE19626523A1 (de) * 1996-07-02 1998-01-08 Salzkotten Tankanlagen Vorrichtung zur dosierten Abgabe von mehreren gleichartigen Flüssigkeiten

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5630528A (en) 1995-01-27 1997-05-20 Gilbarco, Inc. Method and apparatus for metering and dispensing fluid, particulary fuel

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002023138A1 (fr) * 2000-09-15 2002-03-21 Bp Oil International Limited Distributeur et procede d'utilisation associe
US6789699B2 (en) 2000-09-15 2004-09-14 Bp Oil International Limited Dispenser and method of use
AU2001282356B2 (en) * 2000-09-15 2005-11-24 Bp Oil International Limited Dispenser and method of use

Also Published As

Publication number Publication date
SE9803150L (sv) 2000-03-18
EP0987215A3 (fr) 2000-08-09
SE9803150D0 (sv) 1998-09-17
SE517869C2 (sv) 2002-07-23

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