EP0440845A1 - Tap device to dispense fluid fuels - Google Patents

Tap device to dispense fluid fuels Download PDF

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Publication number
EP0440845A1
EP0440845A1 EP90102372A EP90102372A EP0440845A1 EP 0440845 A1 EP0440845 A1 EP 0440845A1 EP 90102372 A EP90102372 A EP 90102372A EP 90102372 A EP90102372 A EP 90102372A EP 0440845 A1 EP0440845 A1 EP 0440845A1
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EP
European Patent Office
Prior art keywords
pump
fuel
dispensing
delivery
nozzle
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.)
Granted
Application number
EP90102372A
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German (de)
French (fr)
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EP0440845B1 (en
Inventor
Gert Miller
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Scheidt and Bachmann GmbH
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Scheidt and Bachmann GmbH
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Publication date
Application filed by Scheidt and Bachmann GmbH filed Critical Scheidt and Bachmann GmbH
Priority to DE9090102372T priority Critical patent/DE59001502D1/en
Priority to EP90102372A priority patent/EP0440845B1/en
Priority to AT90102372T priority patent/ATE89533T1/en
Priority to ES199090102372T priority patent/ES2042092T3/en
Publication of EP0440845A1 publication Critical patent/EP0440845A1/en
Application granted granted Critical
Publication of EP0440845B1 publication Critical patent/EP0440845B1/en
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    • 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
    • B67D7/36—Arrangements of flow- or pressure-control valves
    • 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
    • B67D7/58—Arrangements of pumps
    • B67D7/62—Arrangements of pumps power operated
    • B67D7/66—Arrangements of pumps power operated of rotary type

Definitions

  • the invention relates to a dispensing device for dispensing liquid fuels with at least two dispensing valves, each of which is supplied with fuel by its own measuring device, preferably a piston meter, by a common pump with a downstream gas separator, the pump being driven by an electric motor which, when a Fuel valve is switched on from its holder, fuel being conveyed via a bypass in a closed circuit until the fuel nozzle opens.
  • Such dispensing devices are known.
  • two dispensing valves each arranged at one end of a dispensing hose, are usually supplied by one pump.
  • a gas separator is arranged downstream of this pump in order to ensure that the measuring device assigned to each nozzle valve is supplied with the fuel without bubbles and thus to ensure a correct measurement of the fuel dispensed.
  • the total delivery quantity of the pump in the known dispensing devices is approximately twice the respective maximum dispensing quantity of a dispensing valve.
  • the maximum dispensing quantity per nozzle for example at 40 to 45 liters per minute; the total flow of the pump in this case is about 80 liters per minute if this pump is used to supply two taps.
  • more than two nozzle valves can be supplied by a common pump with a correspondingly higher total delivery rate.
  • the electric motor driving the pump is already switched on when one of the dispensing valves is removed from its holder, it is ensured that sufficient delivery pressure is always available when one or both dispensing valves are inserted after being inserted into the dispenser Tank to be opened.
  • the fuel conveyed by the pump between the removal of the first dispensing valve belonging to the dispensing device from its holder up to the opening of this dispensing valve is conveyed via a bypass in a closed circuit, with full pump output.
  • the check valve either opens and closes at shorter intervals or this check valve remains in an intermediate position. In all these cases, however, throttling losses occur at the check valve in the bypass line due to the negative pressure that occurs. This negative pressure not only leads to vortex formation, but in particular also to gas formation, because the liquid fuel tends to gasify very quickly.
  • This fuel gas generated in the bypass is separated in the gas separator downstream of the pump, but has the major disadvantage that not only relatively large amounts of gas are produced, but that during this gas formation the additives added to the liquid fuel are eliminated, which increases the knock resistance of the fuel serve. These additives are volatile substances which are only present in very small quantities in the fuel and which, if they are eliminated, lead to a rapid deterioration in fuel quality.
  • the object of the invention is to further develop a dispensing device of the type described in the introduction with at least two dispensing valves supplied by a common pump form that the above-described throttle losses leading to gas formation and thus to quality reduction are largely avoided.
  • the solution to this problem by the invention is characterized in that the delivery rate of the pump is regulated by a controller depending on the measurement result of a flow meter installed in the bypass line.
  • This regulator is set in such a way that a certain target quantity, for example 0.5 liters per minute, always flows through the bypass to generate and maintain the required delivery pressure, but that no large amounts of fuel are circulated through the bypass. As a result, the gas formation resulting from the bypass operation is reduced to a minimum, so that losses in quality are avoided both before and during each dispensing operation.
  • a certain target quantity for example 0.5 liters per minute
  • the invention proposes, as an alternative to the arrangement of the flow meter built into the bypass line, which serves to regulate the delivery rate of the pump, the delivery rate of the pump by means of a controller depending on the number of outlets to control dispensing valves removed from their holder according to their share in the total delivery volume through all dispensing valves, taking into account the delivery losses.
  • a simple controller can be used in this case, which reduces the delivery capacity of the pump to 60 percent, for example, if only one of a total of two dispensing valves is removed from the holder.
  • This alternative design is particularly suitable for retrofitting existing dispensing devices.
  • the delivery rate of the pump can be changed via the speed of the electric motor driving the pump, with the aid of known measures, for example a phase control or a frequency change in three-phase motors.
  • the invention can also be used when pumps are used which are driven at a constant speed, but whose delivery rate can be changed by adjusting the pump, for example the eccentricity of a vane pump.
  • the dispensing device comprises two dispensing masts 1, in each of which a dispensing hose 2 is arranged so that it can be pulled out.
  • Each dispensing hose 2 is provided with a dispensing valve 3 and guided over two deflection rollers 4.
  • Each tap hose 2 is connected to a measuring unit 6 via a pipeline 5.
  • These measuring units 6 are designed as piston counters in the exemplary embodiment.
  • a holder 7 is provided on each nozzle 1, into which the respective nozzle 3 is inserted when not in use.
  • the two fuel hoses 2 are supplied with liquid fuel from a fuel reservoir (not shown in the drawing) via a filter 8 by a pump 9 common to both fuel hoses 2.
  • This pump 9 is driven by an electric motor 10 via a drive belt 10a in the exemplary embodiment.
  • the pump 9 draws in the liquid fuel through the filter 8 and conveys it via a gas separator 11 and a check valve 12 to the two measuring units 6.
  • Two solenoid valves 14 are arranged in the pressure line 13 running between the check valve 12 and the two measuring units 6 which the measuring unit 6, which is out of operation, is separated from the pressure line 13.
  • the electric motor 10 is switched on as soon as one of the two dispensing valves 3 is removed from its holder 7.
  • the by Opening this nozzle 3 fuel delivered by the pump 9 is fed via a bypass line 15 in a closed circuit.
  • This bypass line 15 runs between the gas separator 11 and the suction line 16 to the pump 9.
  • the bypass line 15 is connected to this suction line 16 with the interposition of a check valve 17.
  • a return suction line 18 runs parallel to the bypass line 15 between the gas separator 11 and the suction line 16. Via this return suction line 18, which is opened or closed by a float switch 19 arranged in the area of the gas separator 11, the fuel that accumulates in the gas separator 11 is returned to pump 9.
  • the construction of the dispensing device described above is identical for both exemplary embodiments according to FIGS. 1 and 2. Since, in certain operating states, a more or less large amount of fuel is conveyed in the closed circuit via the bypass line 15, pressure losses occur in the check valve 17 of this bypass line 15, which on the one hand lead to undesired eddy formation and on the other hand to the formation of gas bubbles. These gas bubbles are sucked in by the pump 9 and separated in the gas separator 11; however, the mostly volatile additives that have been added to the liquid fuel to increase its knock resistance are eliminated. In particular with a high proportion of gas bubbles, such as results from the circulation of a larger amount of fuel in the closed bypass circuit, this elimination of the additives leads to a noticeable reduction in the quality of the liquid fuel.
  • a flow meter 20 is arranged in the bypass line 15 in the first embodiment.
  • the delivery rate of the pump 9 is regulated by a controller 21.
  • the delivery rate of the pump 9 is regulated by changing the speed of the electric motor 10 driving the pump 9, for example in a manner known per se via a phase control or a frequency change, provided the electric motor 10 is a three-phase motor.
  • the controller 21 is set, for example, so that a set amount, for example 0.5 liters per minute, always flows through the bypass line 15 in order to generate and maintain the required delivery pressure in the dispensing hoses 2. As soon as this target quantity is exceeded, the pump speed is reduced. In this way it is ensured that the amount of fuel circulated in a closed circuit after the first nozzle 3 has been removed from the holder 7 before this nozzle 3 is opened does not exceed the stated target quantity. As soon as a larger amount of fuel is required by opening the nozzle 3, the delivery capacity of the pump 9 is increased by increasing the speed.
  • bypass line 15 Since the amount of fuel circulated via the bypass line 15 is also kept at the setpoint of, for example, 0.5 liters per minute during the entire dispensing process, the vacuum in the bypass line 15 and thus the formation of gas bubbles are minimized in all operating states. A reduction in fuel quality is therefore impossible.
  • a flow meter 20 arranged in the bypass line 15 and a complex controller 21 are dispensed with.
  • a controller 22 is controlled as a function of the number of dispensing valves 3 removed from its holder 7, in accordance with their share in the total delivery rate through all dispensing valves 3, taking into account the delivery losses.
  • the dispensing device is equipped with two dispensing valves 3 supplied by a common pump 9, which require a maximum delivery capacity of the pump 9 of 80 liters per minute when the system is started up, for example, the delivery rate of the pump is reduced 9 by reducing the speed to 40 to 45 liters per minute, provided only one nozzle 3 has been removed from its holder 7.
  • the controller 22 can consequently be made considerably simpler than the controller 21 reacting to the measurement results of the flow meter 20 in the embodiment according to FIG. 1.
  • the embodiment according to FIG. 2 is therefore particularly suitable for retrofitting existing dispensing devices, since an intervention in the hydraulic part the dispensing devices is omitted and the switches 23 necessary for signaling the controller 22 are already present on the holders 7 for the dispensing valves 3.
  • the above-described regulation or control of the delivery capacity of the pump 9 also has the advantage that in all operating states only that energy is used to drive the pump 9 that is required to maintain the required delivery pressure in the hydraulic system. This results in a certain amount of energy savings.

Abstract

The invention relates to a tap device to dispense fluid fuels, having at least two delivery nozzles (3) which are supplied with fuel, in each case via their own measuring device (6), from a common pump (9) having a downstream gas separator (11). The pump (9) is driven by an electric motor (10) which is switched on when a delivery nozzle (3) is removed from its mounting (7). Fuel is conveyed via a bypass line (15) in a closed circuit until the delivery nozzle (3) is opened. To reduce to a minimum the formation of gas bubbles owing to the fuel conveyed via the bypass line (15) in the closed circuit and consequently the elimination of additives which improve the fuel quality, the delivery rate of the pump (9) is regulated by a regulator (21 and 22) either as a function of the measurement result of a flow meter (20) built into the bypass line (15) or controlled as a function of the number of delivery nozzles (3) removed from their mounting, in accordance with their proportion of the total delivery quantity. <IMAGE>

Description

Die Erfindung betrifft eine Zapfvorrichtung zur Ausgabe flüs­siger Kraftstoffe mit mindestens zwei Zapfventilen, die über jeweils eine eigene Meßeinrichtung, vorzugsweise einen Kolben­zähler, von einer gemeinsamen Pumpe mit nachgeschaltetem Gas­abscheider mit Kraftstoff versorgt werden, wobei die Pumpe von einem Elektromotor angetrieben ist, der bei Entnahme eines Zapfventiles aus seiner Halterung eingeschaltet wird, wobei bis zur Öffnung des Zapfventils Kraftstoff über einen Bypass in geschlossenem Kreislauf gefördert wird.The invention relates to a dispensing device for dispensing liquid fuels with at least two dispensing valves, each of which is supplied with fuel by its own measuring device, preferably a piston meter, by a common pump with a downstream gas separator, the pump being driven by an electric motor which, when a Fuel valve is switched on from its holder, fuel being conveyed via a bypass in a closed circuit until the fuel nozzle opens.

Derartige Zapfvorrichtungen sind bekannt. Um den Installa­tionsaufwand und damit die Kosten zu reduzieren, werden üblicherweise zwei jeweils an einem Ende eines Zapfschlauches angeordnete Zapfventile gemeinsam von einer Pumpe versorgt. Dieser Pumpe ist ein Gasabscheider nachgeordnet, um sicherzu­stellen, daß der jedem Zapfventil zugeordneten Meßeinrichtung der Kraftstoff blasenfrei zugeführt und damit eine ordnungs­gemäße Messung des ausgegebenen Kraftstoffes sichergestellt wird.Such dispensing devices are known. In order to reduce the installation effort and thus the costs, two dispensing valves, each arranged at one end of a dispensing hose, are usually supplied by one pump. A gas separator is arranged downstream of this pump in order to ensure that the measuring device assigned to each nozzle valve is supplied with the fuel without bubbles and thus to ensure a correct measurement of the fuel dispensed.

Da jede der beiden, von einer gemeinsamen Pumpe versorgten Zapfstellen für eine bestimmte maximale Ausgabemenge ausgelegt ist, die auch bei gleichzeitigem Betrieb beider Zapfventile erreicht werden soll, beträgt bei den bekannten Zapfvorrich­tungen die Gesamtfördermenge der Pumpe etwa das Doppelte der jeweiligen maximalen Ausgabemenge eines Zapfventils. Bei Zapf­vorrichtungen zur Betankung von Personenkraftwagen liegt die maximale Ausgabemenge pro Zapfventil beispielsweise bei 40 bis 45 Liter pro Minute; die Gesamtfördermenge der Pumpe beträgt in diesem Fall etwa 80 Liter pro Minute, wenn diese Pumpe zur Versorgung von zwei Zapfstellen dient. Selbstverständlich können auch mehr als zwei Zapfventile von einer gemeinsamen Pumpe mit entsprechend höherer Gesamtförderleistung versorgt werden.Since each of the two tapping points supplied by a common pump is designed for a certain maximum dispensing quantity, which is also to be achieved when both dispensing valves are operated at the same time, the total delivery quantity of the pump in the known dispensing devices is approximately twice the respective maximum dispensing quantity of a dispensing valve. In the case of dispensing devices for refueling passenger cars, the maximum dispensing quantity per nozzle, for example at 40 to 45 liters per minute; the total flow of the pump in this case is about 80 liters per minute if this pump is used to supply two taps. Of course, more than two nozzle valves can be supplied by a common pump with a correspondingly higher total delivery rate.

Da bei den bekannten Zapfvorrichtungen der eingangs be­schriebenen Art der die Pumpe antreibende Elektromotor bereits eingeschaltet wird, wenn eines der Zapfventile aus seiner Halterung herausgenommen wird, ist sichergestellt, daß stets ausreichender Förderdruck zur Verfügung steht, wenn eines oder beide Zapfventile nach Einführen in den zu befüllenden Tank geöffnet werden. Der zwischen der Entnahme des ersten zur Zapfvorrichtung gehörenden Zapfventils aus seiner Halterung bis zur Öffnung dieses Zapfventils von der Pumpe geförderte Kraftstoff wird über einen Bypass in geschlossenem Kreislauf gefördert, und zwar mit voller Pumpenleistung.Since in the known dispensing devices of the type described above, the electric motor driving the pump is already switched on when one of the dispensing valves is removed from its holder, it is ensured that sufficient delivery pressure is always available when one or both dispensing valves are inserted after being inserted into the dispenser Tank to be opened. The fuel conveyed by the pump between the removal of the first dispensing valve belonging to the dispensing device from its holder up to the opening of this dispensing valve is conveyed via a bypass in a closed circuit, with full pump output.

Da nicht nur in dem normalerweise kurzen Zeitraum zwischen Entnahme des ersten Zapfventils aus seiner Halterung und dem Öffnen dieses Zapfventils Kraftstoff über den Bypass im ge­schlossenen Kreislauf gefördert wird, sondern auch während eines gesamten Zapfvorganges, sofern nur ein Zapfventil in Be­trieb genommen wird, die Pumpe aber mit voller, auf den gleichzeitigen Betrieb sämtlicher Zapfventile der Zapfvorrich­tung abgestellter Förderleistung betrieben wird, ergeben sich erhebliche Drosselverluste durch das in der Bypassleitung angeordnete Rückschlagventil. Dieses Rückschlagventil ist in der vom Gasabscheider kommenden Bypassleitung vor deren An­schluß an die Saugleitung der Pumpe angeordnet. Es öffnet, sobald der Förderdruck der Pumpe einen am Rückschlagventil eingestellten Druck übersteigt, insbesondere wenn bei einge­ schalteter Pumpe keines der vorhandenen Zapfventile geöffnet wird. Sofern nur eines der vorhandenen Zapfventile zur Ausgabe des flüssigen Kraftstoffes herangezogen wird, erfolgt entweder in kürzeren Abständen ein Öffnen und Schließen des Rückschlag­ventils oder ein Verharren dieses Rückschlagventils in einer Zwischenstellung. In allen diesen Fällen entstehen jedoch am Rückschlagventil in der Bypassleitung Drosselverluste aufgrund auftretenden Unterdrucks. Dieser Unterdruck führt nicht nur zu einer Wirbelbildung, sondern insbesondere auch zur Gasbildung, weil der flüssige Kraftstoff sehr schnell zum Vergasen neigt. Dieses im Bypass entstehende Kraftstoffgas wird zwar in dem der Pumpe nachgeschalteten Gasabscheider abgeschieden, hat aber den großen Nachteil, daß nicht nur verhältnismäßig große Gasmengen anfallen, sondern daß bei dieser Gasbildung die dem flüssigen Kraftstoff beigegebenen Zusätze ausgeschieden werden, die der Erhöhung der Klopffestigkeit des Kraftstoffes dienen. Bei diesen Zusätzen handelt es sich um leicht flüchtige Stoffe, die nur in sehr geringen Mengen im Kraft­stoff vorhanden sind und bei ihrem Ausscheiden demzufolge zu einer rapiden Verschlechterung der Kraftstoffqualität führen.Since fuel is not only pumped through the bypass in a closed circuit in the normally short period between the removal of the first nozzle from its holder and the opening of this nozzle, but also during an entire dispensing process, provided that only one nozzle is put into operation, but the pump is operated with full, based on the simultaneous operation of all the tapping valves of the tapping device, considerable throttling losses result from the check valve arranged in the bypass line. This check valve is arranged in the bypass line coming from the gas separator before it is connected to the suction line of the pump. It opens as soon as the delivery pressure of the pump exceeds a pressure set on the check valve, especially if it is on pump is switched on, none of the existing nozzle valves is opened. If only one of the existing nozzle valves is used to dispense the liquid fuel, the check valve either opens and closes at shorter intervals or this check valve remains in an intermediate position. In all these cases, however, throttling losses occur at the check valve in the bypass line due to the negative pressure that occurs. This negative pressure not only leads to vortex formation, but in particular also to gas formation, because the liquid fuel tends to gasify very quickly. This fuel gas generated in the bypass is separated in the gas separator downstream of the pump, but has the major disadvantage that not only relatively large amounts of gas are produced, but that during this gas formation the additives added to the liquid fuel are eliminated, which increases the knock resistance of the fuel serve. These additives are volatile substances which are only present in very small quantities in the fuel and which, if they are eliminated, lead to a rapid deterioration in fuel quality.

Untersuchungen in der Praxis haben beispielsweise ergeben, daß die Klopffestigkeit eines bleifreien Kraftstoffes "Super Plus" auf den Wert von "Super", d.h. von z.B. 98 Oktan auf z.B. 95 Oktan verringert wird, wenn der Kraftstoff "Super Plus" unter ungünstigen Bedingungen, d.h. stark gedrosselt aus nur einem Zapfventil ausgegeben wird, so daß während des gesamten Zapf­vorganges eine sehr große Menge dieses Kraftstoffes über den Bypass umgewälzt und damit zur Blasenbildung und Ausscheidung der die Klopffestigkeit erhöhenden Zusätze gezwungen wird.Practical studies have shown, for example, that the knock resistance of a lead-free fuel "Super Plus" to the value of "Super", i.e. from e.g. 98 octane on e.g. 95 octane is reduced when the fuel "Super Plus" under unfavorable conditions, i.e. is throttled from only one nozzle, so that a very large amount of this fuel is circulated through the bypass during the entire dispensing process and is thus forced to form bubbles and eliminate the additives that increase the knock resistance.

Der Erfindung liegt die Aufgabe zugrunde, eine Zapfvorrichtung der eingangs beschriebenen Art mit mindestens zwei, von einer gemeinsamen Pumpe versorgten Zapfventilen derart weiterzu­ bilden, daß die voranstehend geschilderten, zur Gasbildung und damit zur Qualitätsverminderung führenden Drosselverluste weitgehend vermieden werden.The object of the invention is to further develop a dispensing device of the type described in the introduction with at least two dispensing valves supplied by a common pump form that the above-described throttle losses leading to gas formation and thus to quality reduction are largely avoided.

Die Lösung dieser Aufgabenstellung durch die Erfindung ist dadurch gekennzeichnet, daß die Förderleistung der Pumpe durch einen Regler in Abhängigkeit vom Meßergebnis eines in die Bypassleitung eingebauten Durchflußmessers geregelt wird.The solution to this problem by the invention is characterized in that the delivery rate of the pump is regulated by a controller depending on the measurement result of a flow meter installed in the bypass line.

Dieser Regler wird so eingestellt, daß zwar zur Erzeugung und Aufrechterhaltung des erforderlichen Förderdruckes stets eine bestimmte Sollmenge, beispielsweise 0,5 Liter pro Minute durch den Bypass strömt, daß aber keine größeren Kraftstoffmengen über den Bypass umgewälzt werden. Hierdurch wird die durch den Bypassbetrieb entstehende Gasbildung auf ein Minimum re­duziert, so daß Qualitätseinbußen sowohl vor als auch während jedes Zapfvorganges vermieden werden.This regulator is set in such a way that a certain target quantity, for example 0.5 liters per minute, always flows through the bypass to generate and maintain the required delivery pressure, but that no large amounts of fuel are circulated through the bypass. As a result, the gas formation resulting from the bypass operation is reduced to a minimum, so that losses in quality are avoided both before and during each dispensing operation.

Um den technischen Aufwand zur Regelung der Förderleistung der Pumpe zu verringern, wird mit der Erfindung alternativ zur An­ordnung des in die Bypassleitung eingebauten, der Regelung der Förderleistung der Pumpe dienenden Durchflußmessers vorge­schlagen, die Förderleistung der Pumpe durch einen Regler in Abhängigkeit von der Anzahl der aus ihrer Halterung ent­nommenen Zapfventile entsprechend deren Anteil an der Gesamt­fördermenge durch alle Zapfventile unter Berücksichtigung der Förderverluste zu steuern.In order to reduce the technical outlay for regulating the delivery rate of the pump, the invention proposes, as an alternative to the arrangement of the flow meter built into the bypass line, which serves to regulate the delivery rate of the pump, the delivery rate of the pump by means of a controller depending on the number of outlets to control dispensing valves removed from their holder according to their share in the total delivery volume through all dispensing valves, taking into account the delivery losses.

Bei dieser erfindungsgemäßen Weiterbildung der bekannten Zapf­vorrichtung erfolgt somit keine stufenlose oder feinstufige Regelung der Förderleistung der Pumpe in Abhängigkeit vom Meß­ergebnis des in die Bypassleitung eingebauten Durchfluß­messers, sondern eine Abstufung der Pumpenförderleistung in Abhängigkeit von der jeweils in Betrieb genommenen Anzahl der insgesamt vorhandenen Zapfventile. Da die Förderverluste nicht proportional mit der Zahl der gleichzeitig betriebenen Zapf­ventile steigen, wird die Pumpe beispielsweise beim Vorhanden­sein zweier Zapfventile nicht mit 50, sondern mit 55 bis 60 Prozent ihrer maximalen Förderleistung betrieben, wenn nur eines der beiden Zapfventile in Betrieb genommen wird. An­stelle eines aufwendigen, von einem in der Bypassleitung ange­ordneten Durchflußmesser gesteuerten Reglers kann in diesem Fall ein einfacher Regler verwendet werden, der die Förder­leistung der Pumpe beispielsweise auf 60 Prozent reduziert, wenn nur ein von insgesamt zwei vorhandenen Zapfventilen aus der Halterung genommen wird. Diese alternative Ausführung eignet sich insbesondere zur Nachrüstung vorhandener Zapfvor­richtungen.In this further development of the known dispensing device according to the invention, there is therefore no stepless or fine-step regulation of the delivery rate of the pump as a function of the measurement result of the flow meter installed in the bypass line, but rather a gradation of the pump delivery rate as a function of the number of pumps in operation total dispensing valves. Since the delivery losses do not increase proportionally with the number of dispensing valves operated at the same time, for example, if two dispensing valves are present, the pump will not be operated with 50, but with 55 to 60 percent of its maximum delivery capacity if only one of the two dispensing valves is put into operation. Instead of a complex controller controlled by a flow meter arranged in the bypass line, a simple controller can be used in this case, which reduces the delivery capacity of the pump to 60 percent, for example, if only one of a total of two dispensing valves is removed from the holder. This alternative design is particularly suitable for retrofitting existing dispensing devices.

In beiden Fällen kann die Förderleistung der Pumpe über die Drehzahl des die Pumpe antreibenden Elektromotors verändert werden, und zwar mit Hilfe bekannter Maßnahmen, beispielsweise einer Phasenanschnittsteuerung oder einer Frequenzänderung bei Drehstrommotoren. Selbstverständlich kann die Erfindung auch eingesetzt werden, wenn Pumpen zum Einsatz kommen, die mit gleichbleibender Drehzahl angetrieben werden, deren Förderlei­stung jedoch durch Verstellen der Pumpe, beispielsweise der Exzentrizität einer Flügelzellenpumpe verändert werden kann.In both cases, the delivery rate of the pump can be changed via the speed of the electric motor driving the pump, with the aid of known measures, for example a phase control or a frequency change in three-phase motors. Of course, the invention can also be used when pumps are used which are driven at a constant speed, but whose delivery rate can be changed by adjusting the pump, for example the eccentricity of a vane pump.

Auf der Zeichnung sind zwei Ausführungsbeispiele der er­findungsgemäßen Zapfvorrichtung schematisch dargestellt, und zwar zeigen:

  • Fig. 1 eine mit zwei Zapfventilen ausgestattete Zapfvor­richtung mit einem in der Bypassleitung ange­ordneten Durchflußmesser und
  • Fig. 2 eine der Fig.1 entsprechende Darstellung einer Zapfvorrichtung, bei welcher die Förderleistung der Pumpe in Abhängigkeit von der Zahl der aus ihrer Halterung entnommenen Zapfventile gesteuert wird.
Two exemplary embodiments of the dispensing device according to the invention are shown schematically in the drawing, namely:
  • Fig. 1 is a dispenser equipped with two dispensing valves with a flow meter arranged in the bypass line and
  • Fig. 2 is a representation corresponding to Fig.1 Dispensing device in which the delivery capacity of the pump is controlled as a function of the number of dispensing valves removed from its holder.

Bei beiden Ausführungen umfaßt die Zapfvorrichtung zwei Zapf­maste 1, in denen jeweils ein Zapfschlauch 2 ausziehbar ange­ordnet ist. Jeder Zapfschlauch 2 ist mit einem Zapfventil 3 versehen und über zwei Umlenkrollen 4 geführt. Ober eine Rohr­leitung 5 steht jeder Zapfschlauch 2 mit einem Meßwerk 6 in Verbindung. Diese Meßwerke 6 sind beim Ausführungsbeispiel als Kolbenzähler ausgeführt. Zur Aufnahme des Zapfventils 3 ist an jedem Zapfmast 1 eine Halterung 7 vorgesehen, in die das je­weilige Zapfventil 3 bei Nichtbenutzung eingesetzt wird.In both versions, the dispensing device comprises two dispensing masts 1, in each of which a dispensing hose 2 is arranged so that it can be pulled out. Each dispensing hose 2 is provided with a dispensing valve 3 and guided over two deflection rollers 4. Each tap hose 2 is connected to a measuring unit 6 via a pipeline 5. These measuring units 6 are designed as piston counters in the exemplary embodiment. To accommodate the nozzle 3, a holder 7 is provided on each nozzle 1, into which the respective nozzle 3 is inserted when not in use.

Die Versorgung der beiden Zapfschläuche 2 mit flüssigem Kraft­stoff erfolgt aus einem auf der Zeichnung nicht dargestellten Kraftstoffvorratsbehälter über einen Filter 8 durch eine für beide Zapfschläuche 2 gemeinsame Pumpe 9. Diese Pumpe 9 wird beim Ausführungsbeispiel über einen Treibriemen 10a von einem Elektromotor 10 angetrieben. Die Pumpe 9 saugt den flüssigen Kraftstoff über den Filter 8 an und fördert ihn über einen Gasabscheider 11 sowie ein Rückschlagventil 12 zu den beiden Meßwerken 6. In der zwischen dem Rückschlagventil 12 und den beiden Meßwerken 6 verlaufenden Druckleitung 13 sind zwei Magnetventile 14 angeordnet, durch die das jeweils außer Be­trieb befindliche Meßwerk 6 von der Druckleitung 13 abgetrennt wird.The two fuel hoses 2 are supplied with liquid fuel from a fuel reservoir (not shown in the drawing) via a filter 8 by a pump 9 common to both fuel hoses 2. This pump 9 is driven by an electric motor 10 via a drive belt 10a in the exemplary embodiment. The pump 9 draws in the liquid fuel through the filter 8 and conveys it via a gas separator 11 and a check valve 12 to the two measuring units 6. Two solenoid valves 14 are arranged in the pressure line 13 running between the check valve 12 and the two measuring units 6 which the measuring unit 6, which is out of operation, is separated from the pressure line 13.

Um den für einen ordnungsgemäßen Zapfvorgang erforderlichen Förderdruck in den beiden Zapfschläuchen 2 aufzubauen, bevor das jeweilige Zapfventil 3 geöffnet wird, erfolgt ein Ein­schalten des Elektromotors 10, sobald eines der beiden Zapf­ventile 3 aus seiner Halterung 7 entnommen wird. Der bis zum Öffnen dieses Zapfventils 3 von der Pumpe 9 geförderte Kraft­stoff wird über eine Bypassleitung 15 im geschlossenen Kreis­lauf gefördert. Diese Bypassleitung 15 verläuft zwischen dem Gasabscheider 11 und der Saugleitung 16 zur Pumpe 9. Die Bypassleitung 15 ist an diese Saugleitung 16 unter Zwischen­schalten eines Rückschlagventils 17 angeschlossen. Parallel zur Bypassleitung 15 verläuft zwischen dem Gasabscheider 11 und der Saugleitung 16 weiterhin eine Rücksaugleitung 18. Über diese Rücksaugleitung 18, die von einem im Bereich des Gasab­scheiders 11 angeordneten Schwimmerschalter 19 geöffnet bzw. geschlossen wird, erfolgt eine Rückführung des sich im Gasab­scheider 11 ansammelnden Kraftstoffes zur Pumpe 9.In order to build up the delivery pressure required for a proper dispensing process in the two dispensing hoses 2 before the respective dispensing valve 3 is opened, the electric motor 10 is switched on as soon as one of the two dispensing valves 3 is removed from its holder 7. The by Opening this nozzle 3 fuel delivered by the pump 9 is fed via a bypass line 15 in a closed circuit. This bypass line 15 runs between the gas separator 11 and the suction line 16 to the pump 9. The bypass line 15 is connected to this suction line 16 with the interposition of a check valve 17. A return suction line 18 runs parallel to the bypass line 15 between the gas separator 11 and the suction line 16. Via this return suction line 18, which is opened or closed by a float switch 19 arranged in the area of the gas separator 11, the fuel that accumulates in the gas separator 11 is returned to pump 9.

Der voranstehend beschriebene Aufbau der Zapfvorrichtung ist für beide Ausführungsbeispiele nach den Figuren 1 und 2 identisch. Da bei bestimmten Betriebszuständen über die Bypassleitung 15 eine mehr oder weniger große Kraftstoffmenge im geschlossenen Kreislauf gefördert wird, entstehen im Rück­schlagventil 17 dieser Bypassleitung 15 Druckverluste, die einerseits zu einer unerwünschten Wirbelbildung und anderer­seits zur Bildung von Gasblasen führen. Diese Gasblasen werden zwar von der Pumpe 9 angesaugt und im Gasabscheider 11 abge­schieden; hierbei werden jedoch die zumeist leicht flüchtigen Zusatzstoffe ausgeschieden, die dem flüssigen Kraftstoff zur Erhöhung seiner Klopffestigkeit zugegeben worden sind. Insbe­sondere bei einem hohen Gasblasenanteil, wie er sich durch das Umwälzen einer größeren Kraftstoffmenge im geschlossenen Bypasskreislauf ergibt, führt dieses Ausscheiden der Zusätze zu einer merklichen Qualitätsverminderung des flüssigen Kraft­stoffes.The construction of the dispensing device described above is identical for both exemplary embodiments according to FIGS. 1 and 2. Since, in certain operating states, a more or less large amount of fuel is conveyed in the closed circuit via the bypass line 15, pressure losses occur in the check valve 17 of this bypass line 15, which on the one hand lead to undesired eddy formation and on the other hand to the formation of gas bubbles. These gas bubbles are sucked in by the pump 9 and separated in the gas separator 11; however, the mostly volatile additives that have been added to the liquid fuel to increase its knock resistance are eliminated. In particular with a high proportion of gas bubbles, such as results from the circulation of a larger amount of fuel in the closed bypass circuit, this elimination of the additives leads to a noticeable reduction in the quality of the liquid fuel.

Um die Gasblasenbildung auf ein Minimum zu reduzieren und damit Qualitätsverschlechterungen des flüssigen Kraftstoffes bei einer voranstehend beschriebenen Zapfvorrichtung zu ver­ meiden, ist beim ersten Ausführungsbeispiel gemäß Fig.1 in der Bypassleitung 15 ein Durchflußmesser 20 angeordnet. In Ab­hängigkeit vom Meßergebnis dieses Durchflußmessers 20 wird die Förderleistung der Pumpe 9 durch einen Regler 21 geregelt. Beim Ausführungsbeispiel erfolgt die Regelung der Förderlei­stung der Pumpe 9 über eine Veränderung der Drehzahl des die Pumpe 9 antreibenden Elektromotors 10, beispielsweise in an sich bekannter Weise über eine Phasenanschnittsteuerung oder eine Frequenzänderung, sofern es sich beim Elektromotor 10 um einen Drehstrommotor handelt.In order to reduce the formation of gas bubbles to a minimum and thus to reduce the quality of the liquid fuel in a dispensing device described above avoid, a flow meter 20 is arranged in the bypass line 15 in the first embodiment. Depending on the measurement result of this flow meter 20, the delivery rate of the pump 9 is regulated by a controller 21. In the exemplary embodiment, the delivery rate of the pump 9 is regulated by changing the speed of the electric motor 10 driving the pump 9, for example in a manner known per se via a phase control or a frequency change, provided the electric motor 10 is a three-phase motor.

Der Regler 21 wird beispielsweise so eingestellt, daß zwecks Erzeugung und Aufrechterhaltung des erforderlichen Förder­druckes in den Zapfschläuchen 2 stets eine Sollmenge, bei­spielsweise 0,5 Liter pro Minute durch die Bypassleitung 15 strömt. Sobald diese Sollmenge überschritten wird, erfolgt eine Reduzierung der Pumpendrehzahl. Auf diese Weise wird sichergestellt, daß die nach dem Entnehmen des ersten Zapf­ventils 3 aus der Halterung 7 vor dem Öffnen dieses Zapfven­tils 3 im geschlossenen Kreislauf umgewälzte Kraftstoffmenge die erwähnte Sollmenge nicht überschreitet. Sobald durch Öffnen des Zapfventils 3 eine größere Kraftstoffmenge benötigt wird, erfolgt eine Erhöhung der Förderleistung der Pumpe 9 durch Drehzahlerhöhung. Da auch während des gesamten Zapfvor­ganges die über die Bypassleitung 15 umgewälzte Kraftstoff­menge auf dem Sollwert von beispielsweise 0,5 Liter pro Minute gehalten wird, ergibt sich bei allen Betriebszuständen eine Minimierung des in der Bypassleitung 15 entstehenden Unter­druckes und damit der Gasblasenbildung. Eine Verminderung der Kraftstoffqualität ist somit ausgeschlossen.The controller 21 is set, for example, so that a set amount, for example 0.5 liters per minute, always flows through the bypass line 15 in order to generate and maintain the required delivery pressure in the dispensing hoses 2. As soon as this target quantity is exceeded, the pump speed is reduced. In this way it is ensured that the amount of fuel circulated in a closed circuit after the first nozzle 3 has been removed from the holder 7 before this nozzle 3 is opened does not exceed the stated target quantity. As soon as a larger amount of fuel is required by opening the nozzle 3, the delivery capacity of the pump 9 is increased by increasing the speed. Since the amount of fuel circulated via the bypass line 15 is also kept at the setpoint of, for example, 0.5 liters per minute during the entire dispensing process, the vacuum in the bypass line 15 and thus the formation of gas bubbles are minimized in all operating states. A reduction in fuel quality is therefore impossible.

Bei dem in Fig.2 dargestellten zweiten Ausführungsbeispiel wird auf einen in der Bypassleitung 15 angeordneten Durchfluß­messer 20 sowie einen aufwendigen Regler 21 verzichtet. Statt­ dessen wird die Förderleistung der Pumpe 9 bzw. die Drehzahl des Elektromotors 10 durch einen Regler 22 in Abhängigkeit von der Anzahl der aus ihrer Halterung 7 entnommenen Zapfventile 3 gesteuert, und zwar entsprechend deren Anteil an der Gesamt­fördermenge durch alle Zapfventile 3 unter Berücksichtigung der Förderverluste. Wenn - wie beim Ausführungsbeispiel nach Fig.2 - die Zapfvorrichtung mit zwei von einer gemeinsamen Pumpe 9 versorgten Zapfventilen 3 ausgestattet ist, die bei gleichzeitiger Inbetriebnahme eine maximale Förderleistung der Pumpe 9 von 80 Liter pro Minute erfordern, erfolgt beispiels­weise eine Reduzierung der Förderleistung der Pumpe 9 durch Drehzahlverringerung auf 40 bis 45 Liter pro Minute, sofern nur ein Zapfventil 3 aus seiner Halterung 7 entnommen worden ist. Der Regler 22 kann demzufolge erheblich einfacher ausge­führt werden als der auf die Meßergebnisse des Durchfluß­messers 20 reagierende Regler 21 beim Ausführungsbeispiel nach Fig. 1. Die Ausführungsform nach Fig.2 eignet sich deshalb be­sonders zur Nachrüstung an vorhandenen Zapfvorrichtungen, da ein Eingriff in den hydraulischen Teil der Zapfvorrichtungen unterbleibt und die zur Signalgabe für den Regler 22 not­wendigen Schalter 23 an den Halterungen 7 für die Zapfventile 3 bereits vorhanden sind.In the second exemplary embodiment shown in FIG. 2, a flow meter 20 arranged in the bypass line 15 and a complex controller 21 are dispensed with. Instead of the delivery rate of the pump 9 or the speed of the electric motor 10 is controlled by a controller 22 as a function of the number of dispensing valves 3 removed from its holder 7, in accordance with their share in the total delivery rate through all dispensing valves 3, taking into account the delivery losses. If, as in the exemplary embodiment according to FIG. 2, the dispensing device is equipped with two dispensing valves 3 supplied by a common pump 9, which require a maximum delivery capacity of the pump 9 of 80 liters per minute when the system is started up, for example, the delivery rate of the pump is reduced 9 by reducing the speed to 40 to 45 liters per minute, provided only one nozzle 3 has been removed from its holder 7. The controller 22 can consequently be made considerably simpler than the controller 21 reacting to the measurement results of the flow meter 20 in the embodiment according to FIG. 1. The embodiment according to FIG. 2 is therefore particularly suitable for retrofitting existing dispensing devices, since an intervention in the hydraulic part the dispensing devices is omitted and the switches 23 necessary for signaling the controller 22 are already present on the holders 7 for the dispensing valves 3.

Mit der voranstehend beschriebenen Regelung bzw. Steuerung der Förderleistung der Pumpe 9 ist schließlich auch der Vorteil verbunden, daß in allen Betriebszuständen nur jeweils diejenige Energie zum Antrieb der Pumpe 9 verbraucht wird, die zur Aufrechterhaltung des erforderlichen Förderdruckes im Hydrauliksystem benötigt wird. Es ergibt sich somit eine ge­wisse Energieeinsparung.Finally, the above-described regulation or control of the delivery capacity of the pump 9 also has the advantage that in all operating states only that energy is used to drive the pump 9 that is required to maintain the required delivery pressure in the hydraulic system. This results in a certain amount of energy savings.

Bezugszeichenliste :Reference symbol list:

  • 1 Zapfmast1 nozzle
  • 2 Zapfschlauch2 dispensing hose
  • 3 Zapfventil3 nozzle
  • 4 Umlenkrolle4 pulley
  • 5 Rohrleitung5 pipeline
  • 6 Meßwerk6 measuring mechanism
  • 7 Halterung7 bracket
  • 8 Filter8 filters
  • 9 Pumpe9 pump
  • 10 Elektromotor10 electric motor
  • 10a Treibriemen10a drive belt
  • 11 Gasabscheider11 gas separators
  • 12 Rückschlagventil12 check valve
  • 13 Druckleitung13 pressure line
  • 14 Magnetventil14 solenoid valve
  • 15 Bypassleitung15 bypass line
  • 16 Saugleitung16 suction line
  • 17 Rückschlagventil17 check valve
  • 18 Rücksaugleitung18 suction line
  • 19 Schwimmerschalter19 float switches
  • 20 Durchflußmesser20 flow meters
  • 21 Regler21 controllers
  • 22 Regler22 controllers
  • 23 Schalter23 switches

Claims (3)

1. Zapfvorrichtung zur Ausgabe flüssiger Kraftstoffe mit mindestens zwei Zapfventilen (3), die über jeweils eine eigene Meßeinrichtung (6), vorzugsweise einen Kolbenzähler, von einer gemeinsamen Pumpe (9) mit nachgeschaltetem Gasab­scheider (11) mit Kraftstoff versorgt werden, wobei die Pumpe (9) von einem Elektromotor (10) angetrieben ist, der bei Entnahme eines Zapfventils (3) aus seiner Halterung (7) eingeschaltet wird, wobei bis zur Öffnung des Zapfventils (3) Kraftstoff über einen Bypass (15) in geschlossenem Kreislauf gefördert wird,
dadurch gekennzeichnet,
daß die Förderleistung der Pumpe (9) durch einen Regler (21) in Abhängigkeit vom Meßergebnis eines in die Bypass­leitung (15) eingebauten Durchflußmessers (20) geregelt wird.1. Dispensing device for dispensing liquid fuels with at least two dispensing valves (3), each of which is supplied with fuel via a separate measuring device (6), preferably a piston meter, from a common pump (9) with a downstream gas separator (11), the pump (9) is driven by an electric motor (10) which is switched on when a nozzle (3) is removed from its holder (7), fuel being conveyed through a bypass (15) in a closed circuit until the nozzle (3) opens ,
characterized,
that the delivery rate of the pump (9) is regulated by a controller (21) depending on the measurement result of a flow meter (20) installed in the bypass line (15). 2. Zapfvorrichtung zur Ausgabe flüssiger Kraftstoffe mit mindestens zwei Zapfventilen (3), die über jeweils eine eigene Meßeinrichtung (6), vorzugsweise einen Kolbenzähler, von einer gemeinsamen Pumpe (9) mit nachgeschaltetem Gasab­scheider (11) mit Kraftstoff versorgt werden, wobei die Pumpe (9) von einem Elektromotor (10) angetrieben ist, der bei Entnahme eines Zapfventils (3) aus seiner Halterung (7) eingeschaltet wird, wobei bis zur Öffnung des Zapfventils (3) Kraftstoff über einen Bypass (15) in geschlossenem Kreislauf gefördert wird,
dadurch gekennzeichnet,
daß die Förderleistung der Pumpe (9) durch einen Regler (22) in Abhängigkeit von der Anzahl der aus ihrer Halterung (7) entnommenen Zapfventile (3) entsprechend deren Anteil an der Gesamtfördermenge durch alle Zapfventile (3) unter Berücksichtigung der Förderverluste gesteuert wird.2. Dispensing device for dispensing liquid fuels with at least two dispensing valves (3), each of which is supplied with fuel by its own measuring device (6), preferably a piston meter, by a common pump (9) with a downstream gas separator (11), the pump (9) is driven by an electric motor (10) which is switched on when a nozzle (3) is removed from its holder (7), fuel being conveyed through a bypass (15) in a closed circuit until the nozzle (3) opens ,
characterized,
that the delivery rate of the pump (9) is controlled by a controller (22) as a function of the number of dispensing valves (3) removed from its holder (7) in accordance with their share in the total delivery rate through all dispensing valves (3) taking into account the delivery losses. 3. Zapfvorrichtung nach Anspruch 1 oder 2, dadurch gekenn­zeichnet, daß die Förderleistung der Pumpe (9) über die Drehzahl des die Pumpe (9) antreibenden Elektromotors (10) veränderlich ist.3. Dispensing device according to claim 1 or 2, characterized in that the delivery capacity of the pump (9) via the speed of the pump (9) driving electric motor (10) is variable.
EP90102372A 1990-02-07 1990-02-07 Tap device to dispense fluid fuels Expired - Lifetime EP0440845B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE9090102372T DE59001502D1 (en) 1990-02-07 1990-02-07 TAP DEVICE FOR DISPENSING LIQUID FUELS.
EP90102372A EP0440845B1 (en) 1990-02-07 1990-02-07 Tap device to dispense fluid fuels
AT90102372T ATE89533T1 (en) 1990-02-07 1990-02-07 DISPENSER FOR DISPENSING LIQUID FUELS.
ES199090102372T ES2042092T3 (en) 1990-02-07 1990-02-07 JET DEVICE FOR THE SUPPLY OF LIQUID FUELS.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP90102372A EP0440845B1 (en) 1990-02-07 1990-02-07 Tap device to dispense fluid fuels

Publications (2)

Publication Number Publication Date
EP0440845A1 true EP0440845A1 (en) 1991-08-14
EP0440845B1 EP0440845B1 (en) 1993-05-19

Family

ID=8203601

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90102372A Expired - Lifetime EP0440845B1 (en) 1990-02-07 1990-02-07 Tap device to dispense fluid fuels

Country Status (4)

Country Link
EP (1) EP0440845B1 (en)
AT (1) ATE89533T1 (en)
DE (1) DE59001502D1 (en)
ES (1) ES2042092T3 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997041057A1 (en) * 1996-04-29 1997-11-06 Tankanlagen Salzkotten Gmbh Device metering and measuring quantities of liquid
EP1074509A1 (en) 1999-08-05 2001-02-07 Dresser Wayne Ab Secondary valve
EP1092091A1 (en) * 1998-05-29 2001-04-18 Dresser Equipment Group, Inc. Pumping system and method for multiple liquids
EP1190986A1 (en) 2000-09-22 2002-03-27 Dresser Wayne Ab Filling station and method for dispensing liquid fuel at such a filling station
EP3395753A1 (en) * 2017-04-28 2018-10-31 Wayne Fueling Systems Sweden AB A fuel pump unit for a fuel dispensing unit, a fuel dispensing unit for refuelling a vehicle , and a method for handling a fuel pump unit for a fuel dispensing unit
WO2019008066A1 (en) * 2017-07-07 2019-01-10 Tokheim Uk Ltd Fuel dispenser comprising a two-speed motor and method for the operation thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2194843A (en) * 1938-02-25 1940-03-26 Tokheim Oil Tank & Pump Co Liquid dispensing apparatus
DE2405081A1 (en) * 1974-02-02 1975-08-07 Grundstuecksverwaltungsgesells Petrol pump delivery appts - dispensing nozzles mounted on wheeled carriage above supply fittings
EP0230822A1 (en) * 1985-12-20 1987-08-05 Ivica Zurak Flow regulating distribution circuit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2194843A (en) * 1938-02-25 1940-03-26 Tokheim Oil Tank & Pump Co Liquid dispensing apparatus
DE2405081A1 (en) * 1974-02-02 1975-08-07 Grundstuecksverwaltungsgesells Petrol pump delivery appts - dispensing nozzles mounted on wheeled carriage above supply fittings
EP0230822A1 (en) * 1985-12-20 1987-08-05 Ivica Zurak Flow regulating distribution circuit

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6196065B1 (en) 1996-04-29 2001-03-06 Marconi Commerce Systems Gmbh & Co. Kg Device metering and measuring quantities of liquid
AU713439B2 (en) * 1996-04-29 1999-12-02 Marconi Commerce Systems Gmbh & Co. Kg Device for metering and measuring quantities of liquid
WO1997041057A1 (en) * 1996-04-29 1997-11-06 Tankanlagen Salzkotten Gmbh Device metering and measuring quantities of liquid
EP1092091A4 (en) * 1998-05-29 2002-06-05 Dresser Equipment Group Inc Pumping system and method for multiple liquids
EP1092091A1 (en) * 1998-05-29 2001-04-18 Dresser Equipment Group, Inc. Pumping system and method for multiple liquids
EP1074509A1 (en) 1999-08-05 2001-02-07 Dresser Wayne Ab Secondary valve
EP1190986A1 (en) 2000-09-22 2002-03-27 Dresser Wayne Ab Filling station and method for dispensing liquid fuel at such a filling station
EP3395753A1 (en) * 2017-04-28 2018-10-31 Wayne Fueling Systems Sweden AB A fuel pump unit for a fuel dispensing unit, a fuel dispensing unit for refuelling a vehicle , and a method for handling a fuel pump unit for a fuel dispensing unit
WO2019008066A1 (en) * 2017-07-07 2019-01-10 Tokheim Uk Ltd Fuel dispenser comprising a two-speed motor and method for the operation thereof
FR3068687A1 (en) * 2017-07-07 2019-01-11 Tokheim Uk Ltd FUEL DISPENSER WITH TWO-SPEED MOTOR AND METHOD OF OPERATION
CN110869311A (en) * 2017-07-07 2020-03-06 托克海姆英国有限公司 Fuel dispenser with two-speed motor and method of operating same
CN110869311B (en) * 2017-07-07 2022-01-07 托克海姆英国有限公司 Fuel dispenser with two-speed motor and method of operating same
AU2018297616B2 (en) * 2017-07-07 2023-10-19 Tokheim Uk Ltd Fuel dispenser comprising a two-speed motor and method for the operation thereof

Also Published As

Publication number Publication date
ATE89533T1 (en) 1993-06-15
EP0440845B1 (en) 1993-05-19
ES2042092T3 (en) 1993-12-01
DE59001502D1 (en) 1993-06-24

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