EP0601132B1 - Motor vehicle fuelling device with gas return by means of a motor-driven gas feeding pump - Google Patents

Motor vehicle fuelling device with gas return by means of a motor-driven gas feeding pump Download PDF

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Publication number
EP0601132B1
EP0601132B1 EP92923507A EP92923507A EP0601132B1 EP 0601132 B1 EP0601132 B1 EP 0601132B1 EP 92923507 A EP92923507 A EP 92923507A EP 92923507 A EP92923507 A EP 92923507A EP 0601132 B1 EP0601132 B1 EP 0601132B1
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EP
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Prior art keywords
motor
gas
regulating unit
feeding pump
pulse generator
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Expired - Lifetime
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EP92923507A
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German (de)
French (fr)
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EP0601132A1 (en
Inventor
Bernhard Hüster
Alfons Harding
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Gilbarco Verwaltungs GmbH
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Tankanlagen Salzkotten GmbH
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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
    • B67D7/0476—Vapour recovery systems
    • B67D7/0478—Vapour recovery systems constructional features or components
    • B67D7/048—Vapour flow control means, e.g. valves, pumps
    • B67D7/0482—Vapour flow control means, e.g. valves, pumps using pumps driven at different flow rates
    • B67D7/0486—Pumps driven in response to electric signals indicative of pressure, temperature or liquid flow

Definitions

  • the invention relates to a device for refueling motor vehicles according to the type specified in the preamble of claim 1.
  • the gas feed pump is driven by an electric stepper motor which receives its pulses from the liquid measuring motor via a pulse generator.
  • a logic unit used in the known device which is connected to an electric motor for driving the positive displacement pump, requires considerable electronic effort, for example memory registers, operation units, multiplier units and comparators.
  • the object of the invention is to be able to draw conclusions from the gas recirculation occurring during the refueling process in a device of the type mentioned at the outset, in order to be able to readjust the ratio in relation to the fuel volume emitted when the gas recirculation is disturbed.
  • control unit is additionally fed back a feedback tacho voltage of the electric motor connected to the gas feed pump as an input variable and that the control unit provides a control variable for the electric motor proportional to the difference between the tanked fuel volume and the recirculated gas quantity by constant comparison at the output.
  • the tachometer voltage is generated by the electric motor which is connected to the gas feed pump in its operation as a tachometer generator.
  • the control unit receives an additional input variable signal proportional to the rotary movement as a measure of the instantaneous flow value of the return gas. If there is a deviation from the specified ratio, a control variable is generated by comparing the two input variables in the control unit, which adjusts the electric motor as an opposing electromotive force (EMF) by readjusting its speed to the correct ratio.
  • EMF electromotive force
  • the electric motor for the gas feed pump is expediently a frequency-controlled commutatorless three-phase three-phase motor or a voltage-controlled direct-current motor with electronic commutation, for example a synchronous motor with a high-energy, permanent-manganese rotor, which contains rare-earth metals, preferably magnets made of cobalt, on its rotor circumference.
  • Magnetic metals of this type are distinguished by the fact that they cannot be demagnetized by high electrical impulse currents.
  • liquid fuel is sucked in via a suction line 1 reaching into the vicinity of the tank bottom by a liquid feed pump 3 installed inside a dispenser housing 2 trained liquid measuring motor 4 is measured.
  • the output shaft of the liquid measuring motor 4 is coupled to a pulse generator 5, which converts the fuel quantity into corresponding electrical signals which are fed to a computer 6 provided in the dispenser housing 2 for the display of the fuel volume and the purchase price to be paid.
  • the basic price, fuel quantity and purchase price are displayed on a monitor 19 in the dispenser head.
  • the fuel sucked in and pumped up for the refueling process leaves the liquid measuring motor 4 via a pipeline 7 and arrives via a nozzle 8 at the nozzle not shown in the drawing.
  • An annular chamber in the dispensing valve receives the gases released during refueling and is connected to a tubular gas return line 9 which is coaxially surrounded by the dispensing hose 8 within the dispenser housing 2 or in the vicinity thereof. Behind the mouth, the gas return line 9 merges into a pipeline 10 which is connected via a flame arrester 11 to a gas feed pump 12 with a controllable motor. The outlet of the gas feed pump 12 leads via a further flame arrester 13 and a gas line 14 through the dome cover into the underground storage container above its liquid level.
  • the controllable motor driving the gas feed pump 12 is a voltage-controlled direct current motor with electronic commutation, which permits analog control and thus analog torque changes.
  • a synchronous motor with a high-energy, permanent-magnet rotor with a cobalt alloy on the circumference of the rotor is particularly suitable for such purposes.
  • a control unit 16 designed as a microprocessor is connected to the pulse generator 5 of the liquid measuring motor 4 and to the electric motor 18 for the gas feed pump 12 via electrical lines, one of which leads via the computer 6 in the dispenser housing 2. From the liquid measuring motor 4, the control unit 16 receives the signals generated by the pulse generator 5 and proportional to the tanked fuel volume as an actual value. The control unit 16 receives an additional one from the electric motor 18 Input variable is a tacho voltage induced during operation of the electric motor as a tachogenerator, which represents a feedback signal proportional to the rotary movement as a measure of the instantaneous flow value of the back-flowing gas.
  • the control unit 16 carries out a comparison of these two input variables and, in the event of a deviation from a proportional ratio between the rotational speed and the amount of gas recirculated, which is determined by calibration, produces a controlled variable which adjusts the speed of the electric motor as an opposing electromotive force (EMF).
  • EMF electromotive force
  • the tanked fuel volume represents the actual value and the returned gas volume the setpoint of the control loop.
  • the control is set so that the ratio is normally 1, i.e. 100% fuel volume corresponds to 100% returned gas volume.
  • This ratio can, however, be corrected, for example, in such a way that a returned gas quantity greater than 100% as the target value corresponds to the actual value of 100% fuel tank volume in order to achieve an increased suckback effect.
  • the control speed is in turn set so that a design-related inertia effect of the gas feed pump is compensated for, that is to say a certain hysteresis is counteracted. This takes place in the control unit 16 in a purely electronic way.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

In order to regulate the speed of rotation of the driving motor (18) of a gas feeding pump (12) that ensures gas return during a fuelling process, in particular when the fuel filling flow increases or decreases at the beginning or end of the fuelling process, so that this speed of rotation is proportional to the amount of returned gas, according to a predetermined calibrating curve, and so that errors affecting the speed of rotation of the motor may be immediately detected and electronically compensated, the real values of the volume of fuel fed into the tank are converted by a pulse generator (5) and supplied as an input value to a regulating unit (16) in the form of a processor, along with the fedback tachometric voltage of the electric motor (18) linked to the gas feeding pump (12). The regulating unit (16) constantly compares said input values and supplies at its output a controlled variable for the electric motor (18) that is proportional to the difference between the volume of fuel filled into the tank and the amount of gas returned. The computer (6) connected to the pulse generator (5) and regulating unit (16) converts the measurement data from the liquid measurement motor (4) and displays them on a monitor for service station clients. The output of the regulating unit (16) is directly connected to the pump motor (18).

Description

Die Erfindung bezieht sich auf eine Vorrichtung zum Betanken von Kraftfahrzeugen nach der im Oberbegriff des Anspruches 1 angegebenen Bauart.The invention relates to a device for refueling motor vehicles according to the type specified in the preamble of claim 1.

Bei einer aus dem DE 90 07 190 U bekannten Bauart wird die Gasförderpumpe von einem elektrischen Schrittmotor angetrieben, der seine Impulse über einen Impulsgeber vom Flüssigkeitsmeßmotor erhält.In a type known from DE 90 07 190 U, the gas feed pump is driven by an electric stepper motor which receives its pulses from the liquid measuring motor via a pulse generator.

Aus der DE 39 03 603 Al ist es darüberhinaus bekannt, zwischen Impulsgeber und Schrittmotor einen Prozessor anzuordnen, dem die Istwerte für das getankte Kraftstoffvolumen als Eingangsgröße aufgeschaltet sind und mit dem das Verhältnis zwischen abgegebenem Kraftstoffvolumen und rückzuführender Dampfmenge einstellbar ist.From DE 39 03 603 A1 it is also known to arrange a processor between the pulse generator and the stepper motor, to which the actual values for the tanked fuel volume are applied as an input variable and with which the ratio between the fuel volume dispensed and the amount of steam to be returned can be adjusted.

Nachteilig ist, daß mit diesem Impulsgeber beim Tankvorgang keine Rückschlüsse aus der dabei auftretenden Gasrückführung über die unabhängig vom Flüssigkeitsmeßmotor in Antriebsverbindung stehende Gasförderpumpe gezogen werden können, um bei gestörter Gasrückführung das Verhältnis in bezug auf das abgegebene Kraftstoffvolumen nachzuregeln.The disadvantage is that with this pulse generator during the refueling process no conclusions can be drawn from the gas recirculation that occurs via the gas feed pump that is independently connected to the liquid measuring motor in order to readjust the ratio in relation to the delivered fuel volume when the gas recirculation is disturbed.

Aus der FR 26 41 267 A ist es bei einer Kraftstoffabfüllanlage mit Gasrückgewinnung bekannt, daß für ein kontrolliertes Absaugen des Dampfluftgemisches in Abhängigkeit vom abgegebenen volumetrischen Durchsatz unter Berücksichtigung eines Druckabfalls und von Temperaturen sowie der Gemischdichte gesteuert wird - dies jedoch bei Erreichen einer turbulenten Strömung des abgesaugten Dampfluftgemisches stromauf der Verdrängerpumpe.From FR 26 41 267 A it is known in a fuel filling system with gas recovery that for a controlled suction of the steam-air mixture depending on the output volumetric throughput taking into account a pressure drop and temperatures and the mixture density - but this is achieved when a turbulent flow of the aspirated steam air mixture upstream of the positive displacement pump.

Aus der DE 40 00 165 Al ist es bei einer Kraftstoffabfüllanlage mit Gasrückgewinnung bekannt, daß für ein kontrolliertes Absaugen des Dampfluftgemisches durch eine Verdrängerpumpe die Pumpendrehzahl fortlaufend in Abhängigkeit vom abgegebenen volumetrischen Durchsatz unter Berücksichtigung eines Druckabfalls und von Temperturen sowie der Gemischdichte gesteuert wird - dies jedoch bei Erreichen einer turbulenten Strömung des abgesaugten Dampfluftgemisches stromauf der Verdrängerpumpe.From DE 40 00 165 Al it is known in a fuel filling system with gas recovery that for a controlled suction of the steam-air mixture by a positive displacement pump, the pump speed is continuously controlled as a function of the volumetric throughput given, taking into account a pressure drop and temperatures and the mixture density - but this when a turbulent flow of the extracted vapor air mixture is reached upstream of the positive displacement pump.

Eine bei der hieraus bekannten Vorrichtung verwendete logische Einheit, die mit einem Elektromotor zum Antrieb der Verdrängerpumpe verbunden ist, erfordert einen erheblichen elektronischen Aufwand, beispielsweise Speicherregister, Operationseinheiten, Multipliziereinheiten und Komparatoren.A logic unit used in the known device, which is connected to an electric motor for driving the positive displacement pump, requires considerable electronic effort, for example memory registers, operation units, multiplier units and comparators.

Demgegenüber liegt der Erfindung die Aufgabe zugrunde, bei einer Vorrichtung der eingangs genannten Bauart Rückschlüsse aus der beim Tankvorgang auftretenden Gasrückführung ziehen zu können, um bei gestörter Gasrückführung das Verhältnis in bezug auf das abgegebene Kraftstoffvolumen nachregeln zu können.In contrast, the object of the invention is to be able to draw conclusions from the gas recirculation occurring during the refueling process in a device of the type mentioned at the outset, in order to be able to readjust the ratio in relation to the fuel volume emitted when the gas recirculation is disturbed.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß der Regeleinheit zusätzlich eine rückgekoppelte Tachospannung des mit der Gasförderpumpe verbundenen Elektromotors als Eingangsgröße aufgeschaltet ist und daß die Regeleinheit durch ständigen Vergleich am Ausgang eine zur Differenz zwischen getanktem Kraftstoffvolumen und rückgeführter Gasmenge proportionale Regelgröße für den Elektromotor liefert.This object is achieved in that the control unit is additionally fed back a feedback tacho voltage of the electric motor connected to the gas feed pump as an input variable and that the control unit provides a control variable for the electric motor proportional to the difference between the tanked fuel volume and the recirculated gas quantity by constant comparison at the output.

Die Tachospannung wird von dem mit der Gasförderpumpe antriebsmäßig verbundenen Elektromotor bei seinem Betrieb als Tachogenerator erzeugt. Bei ihrer Aufschaltung erhält die Regeleinheit als zusätzliche Eingangsgröße ein zur Drehbewegung proportionales Signal als Maß für den momentanen Durchflußwert des rückströmenden Gases. Bei Abweichung vom vorgegebenen Verhältnis wird durch Vergleichsmessung beider Eingangsgrößen in der Regeleinheit eine Regelgröße erzeugt, die als gegenläufige elektromotorische Kraft (EMK) den Elektromotor nachstellt, indem seine Drehzahl wieder auf das korrekte Verhältnis nachgeregelt wird. Dadurch läßt sich insgesamt eine erhöhte Sicherheit der tatsächlich zurückgeführten Gasmenge gewährleisten.The tachometer voltage is generated by the electric motor which is connected to the gas feed pump in its operation as a tachometer generator. When connected, the control unit receives an additional input variable signal proportional to the rotary movement as a measure of the instantaneous flow value of the return gas. If there is a deviation from the specified ratio, a control variable is generated by comparing the two input variables in the control unit, which adjusts the electric motor as an opposing electromotive force (EMF) by readjusting its speed to the correct ratio. As a result, an increased security of the amount of gas actually returned can be ensured overall.

In vorteilhafter Ausgestaltung der Erfindung ist der Rechner zwischen dem mit dem Flüssigkeitsmeßmotor gekoppelten Impulsgeber und der Regeleinheit geschaltet.In an advantageous embodiment of the invention, the computer is connected between the pulse generator coupled to the liquid measuring motor and the control unit.

Zweckmäßigerweise ist der Elektromotor für die Gasförderpumpe ein frequenzgeregelter kommutatorloser Dreiphasen-Drehstrommotor oder ein spannungsgeregelter Gleichstrommotor mit elektronischer Kommutierung, beispielseise ein Synchronmotor mit einem hochenergetischen, permanentmangetischen Läufer, der an seinem Rotorumfang Metalle der Seltenen Erden, vorzugsweise Magnete aus Kobalt, enthält. Magnetmetalle dieser Art zeichnen sich dadurch aus, daß sie sich durch hohe elektrische Impulsströme nicht entmagnetisieren lassen.The electric motor for the gas feed pump is expediently a frequency-controlled commutatorless three-phase three-phase motor or a voltage-controlled direct-current motor with electronic commutation, for example a synchronous motor with a high-energy, permanent-manganese rotor, which contains rare-earth metals, preferably magnets made of cobalt, on its rotor circumference. Magnetic metals of this type are distinguished by the fact that they cannot be demagnetized by high electrical impulse currents.

Weitere Merkmale und Einzelheiten ergeben sich aus den Unteransprüchen.Further features and details emerge from the subclaims.

Nachfolgend ist die Erfindung anhand eines in der einzigen Figur der Zeichnung dargestellten Ausführungsbeispiels näher erläutert; die Zeichnung zeigt eine schematische Darstellung der Zapfsäule einer Kraftfahrzeugtankstelle.The invention is explained in more detail below with reference to an embodiment shown in the single figure of the drawing; the drawing shows a schematic representation of the petrol pump of a motor vehicle filling station.

Aus einem in der Zeichnung nicht dargestellten, unterirdisch angeordneten Lagerbehälter wird bei einem Betankungsvorgang eines aufzutankenden Kraftfahrzeugs über eine bis in die Nähe des Behälterbodens reichende Ansaugleitung 1 durch eine innerhalb eines Zapfsäulengehäuses 2 installierte Flüssigkeitsförderpumpe 3 flüssiger Kraftstoff angesaugt, der in seiner Fördermenge durch einen als Kolbenmesser ausgebildeten Flüssigkeitsmeßmotor 4 gemessen wird. Die Ausgangswelle des Flüssigkeitsmeßmotors 4 ist mit einem Impulsgeber 5 gekoppelt, der die getankte Kraftstoffmenge in entsprechende elektrische Signale umsetzt, welche für die Anzeige des getankten Kraftstoffvolumens und des zu zahlenden Kaufpreises einem im Zapfsäulengehäuse 2 vorgesehenen Rechner 6 zugeführt werden. Die Anzeige von Grundpreis, getankter Kraftstoffmenge und Kaufpreis erfolgt an einem Monitor 19 im Zapfsäulenkopf.From a storage tank, not shown in the drawing, which is arranged underground, during a refueling process of a motor vehicle to be refueled, liquid fuel is sucked in via a suction line 1 reaching into the vicinity of the tank bottom by a liquid feed pump 3 installed inside a dispenser housing 2 trained liquid measuring motor 4 is measured. The output shaft of the liquid measuring motor 4 is coupled to a pulse generator 5, which converts the fuel quantity into corresponding electrical signals which are fed to a computer 6 provided in the dispenser housing 2 for the display of the fuel volume and the purchase price to be paid. The basic price, fuel quantity and purchase price are displayed on a monitor 19 in the dispenser head.

Der für den Betankungsvorgang angesaugte und hochgeförderte Kraftstoff verläßt den Flüssigkeitsmeßmotor 4 über eine Rohrleitung 7 und gelangt über einen Zapfschlauch 8 an das in der Zeichnung nicht wiedergegebene Zapfventil.The fuel sucked in and pumped up for the refueling process leaves the liquid measuring motor 4 via a pipeline 7 and arrives via a nozzle 8 at the nozzle not shown in the drawing.

Eine Ringkammer im Zapfventil nimmt die beim Tanken freiwerdenden Gase auf und steht mit einer schlauchförmigen Gasrückführleitung 9 in Verbindung, die bis zu ihrer Ausmündung innerhalb des Zapfsäulengehäuses 2 oder in dessen Nähe koaxial vom Zapfschlauch 8 umgeben ist. Hinter der Ausmündung geht die Gasrückführleitung 9 in eine Rohrleitung 10 über, die über eine Flammendurchschlagsicherung 11 an eine Gasförderpumpe 12 mit regelbarem Motor angeschlossen ist. Der Ausgang der Gasförderpumpe 12 führt über eine weitere Flammendurchschlagsicherung 13 und eine Gasleitung 14 durch den Domdeckel in den unterirdischen Lagerbehälter oberhalb dessen Flüssigkeitsspiegels.An annular chamber in the dispensing valve receives the gases released during refueling and is connected to a tubular gas return line 9 which is coaxially surrounded by the dispensing hose 8 within the dispenser housing 2 or in the vicinity thereof. Behind the mouth, the gas return line 9 merges into a pipeline 10 which is connected via a flame arrester 11 to a gas feed pump 12 with a controllable motor. The outlet of the gas feed pump 12 leads via a further flame arrester 13 and a gas line 14 through the dome cover into the underground storage container above its liquid level.

Bei dem die Gasförderpumpe 12 antreibenden regelbaren Motor handelt es sich um einen spannungsgeregelten Gleichstrommotor mit elektronischer Kommutierung, der eine analoge Regelung und damit analoge Drehmomentänderungen zuläßt. Besonders geeignet ist für derartige Zwecke ein Synchronmotor mit einem hochenergetischen, permanentmagnetischen Läufer mit einer Kobaltlegierung am Rotorumfang.The controllable motor driving the gas feed pump 12 is a voltage-controlled direct current motor with electronic commutation, which permits analog control and thus analog torque changes. A synchronous motor with a high-energy, permanent-magnet rotor with a cobalt alloy on the circumference of the rotor is particularly suitable for such purposes.

Eine als Mikroprozessor ausgebildete Regeleinheit 16 ist über elektrische Leitungen, von denen eine über den Rechner 6 im Zapfsäulengehäuse 2 führt, an den Impulsgeber 5 des Flüssigkeitsmeßmotors 4 sowie an den Elektromotor 18 für die Gasförderpumpe 12 angeschlossen. Vom Flüssigkeitsmeßmotor 4 erhält die Regeleinheit 16 die vom Impulsgeber 5 erzeugten und zum getankten Kraftstoffvolumen proportionalen Signale als Istwert zugeführt. Vom Elektromotor 18 erhält die Regeleinheit 16 als zusätzliche Eingangsgröße eine beim Betrieb des Elektromotors als Tachogenerator induzierte Tachospannung, die ein zur Drehbewegung proportionales Rückkopplungssignal als Maß für den momentanen Durchflußwert des rückströmenden Gases darstellt.A control unit 16 designed as a microprocessor is connected to the pulse generator 5 of the liquid measuring motor 4 and to the electric motor 18 for the gas feed pump 12 via electrical lines, one of which leads via the computer 6 in the dispenser housing 2. From the liquid measuring motor 4, the control unit 16 receives the signals generated by the pulse generator 5 and proportional to the tanked fuel volume as an actual value. The control unit 16 receives an additional one from the electric motor 18 Input variable is a tacho voltage induced during operation of the electric motor as a tachogenerator, which represents a feedback signal proportional to the rotary movement as a measure of the instantaneous flow value of the back-flowing gas.

Die Regeleinheit 16 führt den Vergleich dieser beiden Eingangsgrößen aus und erzeugt bei Abweichung von einem durch Eichung vorgegebenen proportionalen Verhältnis zwischen Drehzahl und rückgeführter Gasmenge eine Regelgröße, die als gegenläufige elektromotorische Kraft (EMK) den Elektromotor in seiner Drehzahl nachstellt.The control unit 16 carries out a comparison of these two input variables and, in the event of a deviation from a proportional ratio between the rotational speed and the amount of gas recirculated, which is determined by calibration, produces a controlled variable which adjusts the speed of the electric motor as an opposing electromotive force (EMF).

Bei diesem ständigen Vergleich stellt das getankte Kraftstoffvolumen den Istwert und die zurückgeführte Gasmenge den Sollwert des Regelkreises dar. Die Regelung ist so eingestellt, daß normalerweise das Verhältnis 1 ist, d.h. 100% getanktes Kraftstoffvolumen entspricht 100% zurückgeführter Gasmenge. Dieses Verhältnis läßt sich jedoch beispielsweise derart korrigieren, daß einer zurückgeführten Gasmenge größer als 100% als Sollwert der Istwert von 100% getanktem Kraftstoffvolumen entspricht, um einen vergrößerten Rücksaugeffekt zu erzielen.In this constant comparison, the tanked fuel volume represents the actual value and the returned gas volume the setpoint of the control loop. The control is set so that the ratio is normally 1, i.e. 100% fuel volume corresponds to 100% returned gas volume. This ratio can, however, be corrected, for example, in such a way that a returned gas quantity greater than 100% as the target value corresponds to the actual value of 100% fuel tank volume in order to achieve an increased suckback effect.

Die Regelgeschwindigkeit ist wiederum so eingestellt, daß ein bauartbedingter Trägheitseffekt der Gasförderpumpe kompensiert, also einer gewissen Hysterese entgegengewirkt wird. Dies erfolgt in der Regeleinheit 16 auf rein elektronischem Wege.The control speed is in turn set so that a design-related inertia effect of the gas feed pump is compensated for, that is to say a certain hysteresis is counteracted. This takes place in the control unit 16 in a purely electronic way.

Claims (7)

  1. Motor vehicle fuelling device, having a motor-driven gas feeding pump (12) which is provided in the fuel pump for returning the gas quantities released during the fuelling procedure and which is controlled by the liquid-measuring motor (4) of the fuel pump in accordance with the supplied fuel volume, and the liquid-measuring motor (4) is coupled to a pulse generator (5) and a computer (6) is placed downstream of the latter, whereby the actual values converted in the pulse generator (5) for the supplied fuel volume are sent as input variables to a regulating unit (16) constructed as a processor, characterized in that additionally a fed back tacho voltage of the electrical motor (18) connected to the gas feeding pump (12) is sent as input variable to the regulating unit (16), which, as a result of constant comparison at the output, supplies a regulating variable for the electrical motor (18) which is proportional to the difference between the supplied fuel volume and the returned gas quantity.
  2. Device according to Claim 1, characterized in that the computer (6) is placed between the pulse generator (5) driven by the liquid-measuring motor (4) and the regulating unit (16).
  3. Device according to Claim 1, characterized in that the electrical motor (18) for the gas feeding pump (12) is constructed as a frequency-regulated commutator-free three-phase a.c. motor.
  4. Device according to Claim 1, characterized in that the electrical motor (18) for the gas feeding pump (12) is constructed as a voltage-regulated d.c. motor with electronic commutation.
  5. Device according to Claim 3, characterized by the use of a synchronous motor having a high-energy permanent-magnet rotor.
  6. Device according to Claim 5, characterized by the use of a motor having a rotor which contains on its periphery metals of the rare earths.
  7. Device according to Claim 6, characterized by the use of magnets of cobalt on the rotor periphery.
EP92923507A 1991-11-13 1992-11-13 Motor vehicle fuelling device with gas return by means of a motor-driven gas feeding pump Expired - Lifetime EP0601132B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4137345A DE4137345A1 (en) 1991-11-13 1991-11-13 DEVICE FOR REFUELING MOTOR VEHICLES WITH GAS RECIRCULATION BY A MOTOR DRIVEN GAS FEED PUMP
DE4137345 1991-11-13
PCT/EP1992/002616 WO1993010036A1 (en) 1991-11-13 1992-11-13 Motor vehicle fuelling device with gas return by means of a motor-driven gas feeding pump

Publications (2)

Publication Number Publication Date
EP0601132A1 EP0601132A1 (en) 1994-06-15
EP0601132B1 true EP0601132B1 (en) 1996-07-24

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EP92923507A Expired - Lifetime EP0601132B1 (en) 1991-11-13 1992-11-13 Motor vehicle fuelling device with gas return by means of a motor-driven gas feeding pump

Country Status (8)

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EP (1) EP0601132B1 (en)
AT (1) ATE140686T1 (en)
CZ (1) CZ282025B6 (en)
DE (2) DE4137345A1 (en)
HU (1) HU216381B (en)
PL (1) PL170742B1 (en)
TW (1) TW293003B (en)
WO (1) WO1993010036A1 (en)

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Publication number Priority date Publication date Assignee Title
EP0678476B1 (en) * 1994-04-16 1998-10-07 Scheidt & Bachmann Gmbh Apparatus for delivering liquid fuels
EP0870728B1 (en) * 1997-04-10 2006-07-12 Scheidt & Bachmann Gmbh Apparatus for distributing liquid fuel
FR2796636B1 (en) 1999-07-23 2002-01-04 Solutions Serv Syst France METHOD FOR MONITORING THE PROPER OPERATION OF THE VAPOR RECOVERY SYSTEM EMITTED IN A FUEL DISTRIBUTION INSTALLATION AS WELL AS AN INSTALLATION ALLOWING THE IMPLEMENTATION OF THIS PROCESS
FR2796635A1 (en) * 1999-07-23 2001-01-26 Solutions Serv Syst France Checking correct operation of system for recovering vapor emitted in fuel dispensing installation by detecting value of vapor delivery rate and transmitting that value comparator for its comparing with liquid delivery rate

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3613453A1 (en) * 1986-04-21 1987-10-22 Deutsche Geraetebau Gmbh Device for refuelling motor vehicles
DE8717378U1 (en) * 1987-10-05 1988-09-15 Tankanlagen Salzkotten GmbH, 4796 Salzkotten Fuel dispenser for installation in motor vehicle filling stations with vapour extraction by a gas pump
IT1228284B (en) * 1989-01-04 1991-06-07 Nuovo Pignone Spa IMPROVED SYSTEM FOR SAFE STEAM RECOVERY, PARTICULARLY SUITABLE FOR FUEL DISTRIBUTION SYSTEMS
DE3903603C2 (en) * 1989-02-08 1994-10-06 Schwelm Tanksysteme Gmbh Tank system for motor vehicles
DE9007190U1 (en) * 1990-06-28 1990-08-30 Tankanlagen Salzkotten GmbH, 4796 Salzkotten Device for refuelling motor vehicles with gas recirculation by a motor-driven gas pump

Also Published As

Publication number Publication date
PL170742B1 (en) 1997-01-31
PL300000A1 (en) 1994-01-24
CZ129193A3 (en) 1995-11-15
CZ282025B6 (en) 1997-04-16
EP0601132A1 (en) 1994-06-15
HU216381B (en) 1999-06-28
HU9301975D0 (en) 1993-10-28
ATE140686T1 (en) 1996-08-15
DE59206827D1 (en) 1996-08-29
TW293003B (en) 1996-12-11
HUT68362A (en) 1995-06-28
WO1993010036A1 (en) 1993-05-27
DE4137345A1 (en) 1993-05-19

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