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EP1077197B1 - Control device for fuel vapour recovery - Google Patents

Control device for fuel vapour recovery Download PDF

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Publication number
EP1077197B1
EP1077197B1 EP99125025A EP99125025A EP1077197B1 EP 1077197 B1 EP1077197 B1 EP 1077197B1 EP 99125025 A EP99125025 A EP 99125025A EP 99125025 A EP99125025 A EP 99125025A EP 1077197 B1 EP1077197 B1 EP 1077197B1
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EP
European Patent Office
Prior art keywords
fuel
tank
gas
pump
gas recirculation
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.)
Expired - Lifetime
Application number
EP99125025A
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German (de)
French (fr)
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EP1077197A1 (en
Inventor
Jehad Aiysh
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Aiysh Jehad
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Aiysh Jehad
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Publication date
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Priority claimed from DE1999138918 external-priority patent/DE19938918A1/en
Priority claimed from DE29914372U external-priority patent/DE29914372U1/en
Application filed by Aiysh Jehad filed Critical Aiysh Jehad
Publication of EP1077197A1 publication Critical patent/EP1077197A1/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B67OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67DDISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D7/00Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
    • B67D7/04Apparatus 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
    • B67D7/0476Vapour recovery systems
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B67OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67DDISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D7/00Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
    • B67D7/06Details or accessories
    • B67D7/32Arrangements of safety or warning devices; Means for preventing unauthorised delivery of liquid
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B67OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67DDISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D7/00Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
    • B67D7/06Details or accessories
    • B67D7/32Arrangements of safety or warning devices; Means for preventing unauthorised delivery of liquid
    • B67D7/3281Details
    • B67D2007/329Function indicator devices

Definitions

  • the invention relates to a device for monitoring the gas recirculation for Fuel lines with a line, on the one hand with a fuel nozzle, on the other hand communicates with a tank and in which a pump is arranged, the Fuel nozzle has a suction nozzle, which is connected to the tank via the line is.
  • Fuel tank columns are installed in locations where vehicles take up fuel can, so-called petrol stations. This is done in corrosion-proof tanks fuel stored underground by generally electrically operated pumps promoted the fuel tank columns. From there, the fuel is passed through flow meters and pressed a nozzle into the nozzle. Between the The fuel tank and the above-ground atmosphere are pressure balanced.
  • Monitoring for fuel tank columns of the type mentioned is from WO 97 06095 A known.
  • the monitoring system has a nozzle.
  • the nozzle is connected to a tank via a line.
  • a suction nozzle is in the known device not described in connection with the nozzle.
  • a device for example Executive Order G-70-154-AA of California Environmental Protection Agency announced on June 10, 1997.
  • the invention has for its object a monitoring device for fuel tank columns to create a failure for both the users of the fuel tank columns as the petrol station staff is immediately recognizable, a simple one and at the same time a reliable modular structure is realized and in the event of a malfunction Error messages are displayed, which simplifies repair is.
  • this object is achieved in that the device monitoring electronics for checking the function of the gas routing system with inputs and outputs that has a display and that on an input is connected to a gas measuring probe.
  • the invention is a monitoring for gas recirculation systems on fuel tank columns created in which a possible failure of the gas recirculation due to constant surveillance is immediately visible. Both the users of the fuel tank columns as well as the petrol station staff is warned. Through the monitoring device can automatic shutdown of the fuel tank column take place in order to avoid a health or environmental hazard.
  • the monitoring electronics ensures a simple and at the same time reliable, modular Structure of the device. With the help of the display in the event of a malfunction Error messages are displayed, which simplifies repair becomes. Maintenance is also simplified with the help of the messages that can be shown on the display.
  • a further development of the invention is a solenoid valve on the monitoring electronics connected. This enables the monitoring electronics to be reliable and fast react in the event of a malfunction of the solenoid valve.
  • the fuel tank column 1 chosen as an exemplary embodiment is arranged in a gas station and is equipped with a gas recirculation system (GRFA). It is connected via a fuel line 2 to a corrosion-resistant storage tank 3. The fuel is stored cooled in the storage tank 3. In the line 2, a pump 4 is arranged, which conveys the fuel from the storage tank 3 in the direction of the fuel tank column 1.
  • a flow measuring device 5 is provided in the fuel tank column 1, which in the exemplary embodiment is a piston meter. Following the flow measuring device 5, a fuel nozzle 6 is connected to the fuel line 2 and ends in a fuel nozzle 7.
  • the gas recirculation system connects the fuel nozzle 7 to the tank 3.
  • the fuel nozzle 7 has a suction nozzle 8, which is connected to the fuel pump 1 via a gas return hose 9.
  • the hose 9 is connected to a line 10 for gas recirculation.
  • a pump 11, which in the exemplary embodiment is designed as a vacuum pump, is arranged in line 10.
  • the line 10 ends in the storage tank 3.
  • the gas collected can also be collected in a tank separate from the storage tank 3.
  • the gas recirculation system (GRFA) further comprises control electronics 13, a solenoid valve 15, which is arranged in line 10, and a power supply unit 16.
  • a device 12 for monitoring the gas recirculation is provided on the gas recirculation system.
  • the device 12 essentially consists of monitoring electronics 14 for the gas recirculation.
  • the power supply 16 has a grounded PE connection and an AC connection of 230 V (AC 230 V).
  • the power supply unit 16 is connected on the one hand to the control electronics 13, and on the other hand to the monitoring electronics 14 for the gas recirculation.
  • the control electronics 13 are also connected to the monitoring electronics 14 for the gas recirculation.
  • the control electronics 13 is connected to the solenoid valve 15, which is arranged in the line 10 of the gas recirculation.
  • the monitoring electronics 14 for the gas recirculation has a display 141. It is also equipped with inputs E1 to E6, which are used to monitor the components connected to the individual inputs, and outputs A1 to A4, which are used to control the components connected to the individual outputs.
  • the connection to the control electronics 13 is established via the input E1; with the Input E2 the connection with the power supply 16.
  • the device 12 Via the connection of the power supply 16 with the input E2 is the device 12, including monitoring electronics 14 and connected components with power from the power supply 16.
  • a reset button S2 is arranged with which the monitoring is drivable to zero.
  • the input E3 connects the monitoring electronics 14 with that in the Gas line 10 of the gas return arranged pump 11.
  • a vacuum monitor 111 In the connection between The input E3 of the electronics 14 and the pump 11 is a vacuum monitor 111 arranged.
  • the vacuum monitor 111 is in the form of a Pressure switch trained and is explosion-proof.
  • the vacuum monitor 111 can also be designed as a gas measuring probe to determine analog measured values of the gas can.
  • the input E4 is connected to the solenoid valve 15. With input E5 is the monitoring electronics 14 to one provided in the nozzle 7 Nozzle valve 71 and with input E6 to flow measuring device 5 connected.
  • the output A1 is connected to a green indicator light L1 in the exemplary embodiment; the output A2 with a red indicator light L2 in the exemplary embodiment.
  • the control lights L1 and L2 are preferably arranged in the visible area on the fuel tank column 1.
  • the output A3 connects the monitoring electronics 14 to a switch S1.
  • An acoustic detector in the form of a horn H is connected to the output A4.
  • the horn H should, if possible, be arranged in the area of the fuel tank column 1 such that it can be heard in the entire area of the gas station.
  • a voice module can also be provided instead of a horn.
  • the control electronics 13 measure the amount of fuel flowing through the measuring device 5 via their connections to the monitoring electronics 14.
  • control electronics 13 controls the solenoid valve 15 in the gas line 10. If the gas recirculation is functioning correctly, the control lamp L1 lights up. The fuel tank system with the gas recirculation are ready. If a fueling process is now started and the nozzle valve 71 on the nozzle 7 is actuated, a signal is sent to the monitoring electronics 14 via the input E5. At the same time, 5 pulses are forwarded by the flow measuring device via the input E6 to the monitoring electronics 14 as a result of the fueling process being started.
  • the flow of the Gas which usually consists of fuel vapors and an air mixture, through which Vacuum pump 11 measured.
  • the flow rate of the gas depends on the Flow rate of the fuel, which is determined by means of the flow measuring device 5.
  • the device 12 via the inputs E3 and E6, the flow rates of gas and Fuel measures, compares the determined values with each other. The values point at normal Function of the gas recirculation to a certain proportionality to each other.
  • the control electronics 13 or the solenoid valve 15 - a signal is generated sent to the light L1 so that it goes out and the control light L2 starts to light up.
  • the fuel pump can be switched off automatically after the ongoing fueling process.
  • An error diagnosis appears on display 141.
  • the monitoring electronics 14 conduct a signal to the output A4 in order to release an acoustic message.
  • the tank system can be switched off automatically if the gas recirculation fails. This prevents an uncontrolled and unnoticed escape of the gases, which are harmful to the environment and human health. In addition, it is possible to easily carry out a fault diagnosis using the display in the event of a malfunction.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)
  • Supplying Secondary Fuel Or The Like To Fuel, Air Or Fuel-Air Mixtures (AREA)

Abstract

The system has control lamps or indicators, which are arranged at a visible region of the petrol pump. The indicators are designed to diagnose or indicate faults. The monitoring system may be used to monitor the gas (vacuum) pump, the electronic control unit or the magnetic valve.

Description

Die Erfindung betrifft eine Vorrichtung zur Überwachung der Gasrückführung für Kraftstoffsäuten mit einer Leitung, die einerseits mit einer Zapfpistole, andererseits mit einem Tank in Verbindung steht und in der eine Pumpe angeordnet ist, wobei die Zapfpistole einen Saugrüssel aufweist, der über die Leitung mit dem Tank verbunden ist.The invention relates to a device for monitoring the gas recirculation for Fuel lines with a line, on the one hand with a fuel nozzle, on the other hand communicates with a tank and in which a pump is arranged, the Fuel nozzle has a suction nozzle, which is connected to the tank via the line is.

Kraftstofftanksäulen sind an Orten aufgestellt, an denen Fahrzeuge Kraftstoff aufnehmen können, sogenannten Tankstellen. Dabei wird der in korrosionssicheren Tanks unterirdisch gelagerte Kraftstoff durch in der Regel elektrisch betriebene Pumpen zu den Kraftstofftanksäulen gefördert. Von dort wird der Kraftstoff über Durchflussmeßeinrichtungen und einen Zapfschlauch in die Zapfpistole gedrückt. Zwischen dem Kraftstofftank und der oberirdischen Atmosphäre erfolgt dabei ein Druckausgleich.Fuel tank columns are installed in locations where vehicles take up fuel can, so-called petrol stations. This is done in corrosion-proof tanks fuel stored underground by generally electrically operated pumps promoted the fuel tank columns. From there, the fuel is passed through flow meters and pressed a nozzle into the nozzle. Between the The fuel tank and the above-ground atmosphere are pressure balanced.

Seit dem 01. Januar 1993 sind in Deutschland für neu eingerichtete Tankstellen bei der Fahrzeugbetankung Anlagen zur Rückführung gesundheitsgefährdender Kraftstoffdämpfe (Gasrückführung) vorgeschrieben. Für bestehende Tankstellen gelten je nach Kraftstoffumsatz Übergangsfristen von drei bis fünf Jahren. Bei der Gasrückführung, mit der der Austritt der gesundheitsschädlichen Gase (vor allem Benzol in bleifreiem Benzin) bei der Fahrzeugbetankung verhindert werden soll, ist die Zapfpistole mit einer Saugleitung zur Gasrückführung vom Fahrzeugtank in den unterirdischen Vorratstank verbunden. Das Absaugen der Gase erfolgt über eine Pumpe oder, nach gasdichtem Abschluss der Saugleitung am Tankstutzen mit einer Gummimanschette, mittels Druckausgleich. Die abgesaugten Gase werden in der Regel in den Vorratsbehälter zurückgeleitet und kondensieren dort aufgrund der geringen Temperaturen im Vorratsbehälter aus. Mit Hilfe der Gasrückführungsanlagen können etwa 70 % der flüchtigen Kraftstoffanteile zurückgehalten werden.Since January 1st, 1993 there have been new gas stations in Germany vehicle refueling systems for the return of health-endangering fuel vapors (Gas recirculation) mandatory. For existing petrol stations each apply transition periods of three to five years after fuel sales. With gas recirculation, with which the escape of harmful gases (especially benzene in unleaded petrol) is to be prevented when refueling the vehicle, the nozzle is with a suction line for gas recirculation from the vehicle tank to the underground Storage tank connected. The gases are extracted by a pump or, after gas-tight closure of the suction line on the tank neck with a rubber sleeve, by means of pressure equalization. The extracted gases are usually in the Reservoir returned and condense there due to the low temperatures in the storage container. With the help of gas recirculation systems, about 70 % of the volatile fuel components are retained.

Bei den bekannten Gasrückführungsanlagen an Kraftstofftanksäulen tritt häufig das Problem auf, dass es zu Ausfällen der Anlagen kommt. In diesen Fällen werden die gesundheitsgefährdenden Gase nicht in den Vorratsbehälter zurückgeführt, sondern sie verflüchtigen sich in die Atmosphäre. Der eigentlich mit Hilfe der Gasrückführungen erwünschte Effekt des Gesundheits- bzw. Umweltschutzes tritt nicht ein; vielmehr tritt in diesem Fall unvermindert viel Gas wie bei einer Kraftstofftanksäule ohne Gasrückführungsanlage aus. Da die austretenden Gase nicht sichtbar sind, ist weder für den Benutzer der Kraftstofftanksäule noch für das Tankstellenpersonal der Ausfall erkennbar. Eine Funktionsüberprüfung der Gasrückführungsanlage an Kraftstofftanksäulen ist nur mit großem Aufwand durchführbar.This often occurs in the known gas recirculation systems on fuel tank columns Problem on that the equipment fails. In these cases, the gases that are hazardous to health are not returned to the storage container, but instead they evaporate into the atmosphere. The actually with the help of gas recirculation the desired effect of health and environmental protection does not occur; much more In this case, there is an undiminished amount of gas as with a fuel tank column without Gas recirculation system. Since the escaping gases are not visible, neither the failure for the user of the fuel tank column and for the petrol station staff recognizable. A function check of the gas recirculation system on fuel tank columns can only be carried out with great effort.

Eine Überwachung für Kraftstofftanksäulen der eingangs genannten Art ist aus WO 97 06095 A bekannt. Die Überwachung weist eine Zapfpistole auf. Die Zapfpistole steht über eine Leitung mit einem Tank in Verbindung. In der Leitung ist eine Pumpe angeordnet. Bei der bekannten Überwachung ist auch eine Vorrichtung zur Überwachung der Gasrückführung vorgesehen. Ein Saugrüssel ist bei der bekannten Vorrichtung in Verbindung mit der Zapfpistole nicht beschrieben.Monitoring for fuel tank columns of the type mentioned is from WO 97 06095 A known. The monitoring system has a nozzle. The nozzle is connected to a tank via a line. There is a pump in the pipe arranged. In the known monitoring there is also a monitoring device gas recirculation. A suction nozzle is in the known device not described in connection with the nozzle.

Aus der Executive Order G-70-154-AA der California Environmental Protection Agency vom 10. Juni 1997 ist ein Dampfrückführungssystem bekannt, bei dem während der Befüllung eines Autotanks mit Treibstoff durch eine Zapfpistole entweichende Dämpfe über eine zusätzliche Leitung in der Zapfpistole abgesaugt werden. Die Absaugung erfolgt über eine in der Zapfsäule angeordnete Pumpe. Die abgesaugten Dämpfe werden über Leitungen in ein unterirdisches Tanksystem geführt. Das System kann mit einer elektronischen Überwachung ausgerüstet sein, die sicherstellt, dass kein Treibstoff abgegeben wird, wenn das System nicht ordnungsgemäß arbeitet. Auf einem Display der Tanksäule wird ein Fehlercode ausgegeben, welcher das aufgetretene Problem identifiziert.From California Environmental Protection's Executive Order G-70-154-AA Agency dated June 10, 1997 a steam return system is known, during which the filling of a car tank with fuel escaping through a fuel nozzle Vapors are drawn off via an additional line in the nozzle. The suction takes place via a pump arranged in the pump. The vacuumed Vapors are piped into an underground tank system. The System can be equipped with electronic monitoring that ensures that no fuel is released if the system is not working properly is working. An error code is output on a display of the fuel pump identified the problem encountered.

Aus der US 5 355 915 ist eine Kraftstoffabgabevorrichtung mit Rückgewinnung von Kraftstoffdämpfen bekannt. Dabei ist in der Zapfpistole eine Leitung zum Absaugen entweichender Kraftstoffdämpfe angeordnet. Die Absaugung erfolgt über eine Pumpe, welche die Dämpfe in einen unterirdischen Tank fördert, wo diese kondensieren. Eine in der Zapfsäule integrierte Steuerungseinrichtung vergleicht den Zustand der Kraftstoffpumpe mit dem der Dampfpumpe und sperrt den Betrieb der Abgabevorrichtung, wenn die beiden Signale für eine Zeitdauer nicht übereinstimmen, die eine vorgegebene Schwelle überschreitet. Die Zustandsüberwachung der Dampfpumpe erfolgt durch kontinuierliche Messung des elektrischen Stroms, der den Dampfpumpenmotor antreibt. Ein in die Absaugleitung integriertes Ventil, welches über die Steuerungseinrichtung betätigt wird, verhindert, dass überschwappender Treibstoff in die Absaugleitung eindringen kann. Weiterhin verhindert das Ventil auch das Entweichen von Dampf infolge von Rückdruck in dem System, wenn die Dampfrückgewinnungspumpe inaktiv ist.From US 5 355 915 is a fuel dispenser with recovery of Fuel vapors known. There is a suction line in the nozzle escaping fuel vapors arranged. The suction takes place via a pump, which transports the vapors into an underground tank where they condense. A Control device integrated in the fuel pump compares the state of the fuel pump with that of the steam pump and blocks the operation of the dispenser, if the two signals do not match for a period of time that is a predetermined one Threshold exceeds. The condition of the steam pump is monitored by continuously measuring the electrical current that runs the steam pump motor drives. A valve integrated in the suction line, which via the control device operated, prevents spilling fuel into the suction line can penetrate. The valve also prevents the escape of Steam due to back pressure in the system when the steam recovery pump is inactive.

Eine Vorrichtung gemäß dem Oberbegriff des Anspruchs 1 ist zum Beispiel aus der Executive Order G-70-154-AA der California Environmental Protection Agency vom 10 Juni 1997 bekannt.A device according to the preamble of claim 1 is, for example Executive Order G-70-154-AA of California Environmental Protection Agency announced on June 10, 1997.

Der Erfindung liegt die Aufgabe zugrunde, eine Überwachungsvorrichtung für Kraftstofftanksäulen zu schaffen, bei der ein Ausfall sowohl für die Benutzer der Kraftstofftanksäulen als auch das Tankstellenpersonal unmittelbar erkennbar ist, ein einfacher und zugleich zuverlässiger modulartiger Aufbau realisiert ist und bei einer Funktionsstörung Fehlermeldungen angezeigt werden, wodurch die Instandsetzung vereinfacht ist. Gemäss der Erfindung wird diese Aufgabe dadurch gelöst, dass die Vorrichtung eine Überwachungselektronik für die Funktionsüberprüfung der Gasführungsanlage mit Eingängen und Ausgängen beinhaltet, die ein Display aufweist und dass an einen Eingang eine Gasmesssonde angeschlossen ist. The invention has for its object a monitoring device for fuel tank columns to create a failure for both the users of the fuel tank columns as the petrol station staff is immediately recognizable, a simple one and at the same time a reliable modular structure is realized and in the event of a malfunction Error messages are displayed, which simplifies repair is. According to the invention, this object is achieved in that the device monitoring electronics for checking the function of the gas routing system with inputs and outputs that has a display and that on an input is connected to a gas measuring probe.

Mit der Erfindung ist eine Überwachung für Gasrückführungsanlagen an Kraftstofftanksäulen geschaffen, bei der ein möglicher Ausfall der Gasrückführung aufgrund der ständigen Überwachung unmittelbar sichtbar ist. Sowohl die Benutzer der Kraftstofftanksäulen als auch das Tankstellenpersonal ist dadurch gewarnt. Durch die Überwachungsvorrichtung kann eine automatische Abschaltung der Kraftstofftanksäule erfolgen, um eine Gesundheits- bzw. Umweltgefährdung zu vermeiden. Die Überwachungselektronik gewährleistet einen einfachen und zugleich zuverlässigen, modulartigen Aufbau der Vorrichtung. Mit Hilfe des Displays können bei einer Funktionsstörung Fehlermeldungen angezeigt werden, wodurch die Instandsetzung vereinfacht wird. Auch ist die Wartung mit Hilfe der im Display anzeigbaren Meldungen vereinfacht.With the invention is a monitoring for gas recirculation systems on fuel tank columns created in which a possible failure of the gas recirculation due to constant surveillance is immediately visible. Both the users of the fuel tank columns as well as the petrol station staff is warned. Through the monitoring device can automatic shutdown of the fuel tank column take place in order to avoid a health or environmental hazard. The monitoring electronics ensures a simple and at the same time reliable, modular Structure of the device. With the help of the display in the event of a malfunction Error messages are displayed, which simplifies repair becomes. Maintenance is also simplified with the help of the messages that can be shown on the display.

In Weiterbildung der Erfindung ist ein Magnetventil an die Überwachungselektronik angeschlossen. Hierdurch kann die Überwachungselektronik zuverlässig und schnell im Falle einer Funktionsstörung des Magnetventils reagieren. A further development of the invention is a solenoid valve on the monitoring electronics connected. This enables the monitoring electronics to be reliable and fast react in the event of a malfunction of the solenoid valve.

Vorteilhaft sind an Ausgängen der Überwachungselektronik Kontrolleuchten und/oder akustische Melder angeschlossen. Mit Hilfe der Kontrolleuchten und/oder akustischen Melder ist sowohl die Funktionsbereitschaft als auch eine Funktionsstörung sowohl für die Benutzer der Tankanlage als auch für das Tankstellenpersonal problemlos und weithin sichtbar bzw. hörbar.
Andere Ausgestaltungen und Weiterbildungen sind in den übrigen Unteransprüchen angegeben. Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird nachfolgend im einzelnen beschrieben. Es zeigen:

Fig. 1
die schematische Darstellung einer Kraftstofftanksäule,
Fig. 2
einen Blockschaltplan der Überwachungsvorrichtung der Gasrückführung und
Fig. 3
die Darstellung der Arbeitsweise der Überwachungsvorrichtung anhand eines Flussdiagramms.
Indicator lights and / or acoustic detectors are advantageously connected to outputs of the monitoring electronics. With the help of the indicator lights and / or acoustic detectors, both the operational readiness and a malfunction are easily and widely visible or audible both for the users of the tank system and for the petrol station staff.
Other refinements and developments are specified in the remaining subclaims. An embodiment of the invention is shown in the drawing and will be described in detail below. Show it:
Fig. 1
the schematic representation of a fuel tank column,
Fig. 2
a block diagram of the gas recirculation monitoring device and
Fig. 3
the representation of the operation of the monitoring device using a flow chart.

Die als Ausführungsbeispiel gewählte Kraftstofftanksäule 1 ist in einer Tankstelle angeordnet und mit einer Gasrückführungsanlage (GRFA) ausgestattet. Sie steht über eine Kraftstoffleitung 2 mit einem korrosionssicheren Vorratstank 3 in Verbindung.
In dem Vorratstank 3 ist der Kraftstoff gekühlt gelagert. In der Leitung 2 ist eine Pumpe 4 angeordnet, die den Kraftstoff aus dem Vorratstank 3 in Richtung der Kraftstofftanksäule 1 fördert In der Kraftstofftanksäule 1 ist eine Durchflussmesseinrichtung 5 vorgesehen, bei der es sich im Ausführungsbeispiel um einen Kolbenmesser handelt. Im Anschluss an die Durchflussmesseinrichtung 5 ist an die Kraftstoffleitung 2 ein Zapfschlauch 6 angeschlossen, der in einer Zapfpistole 7 endet.
The fuel tank column 1 chosen as an exemplary embodiment is arranged in a gas station and is equipped with a gas recirculation system (GRFA). It is connected via a fuel line 2 to a corrosion-resistant storage tank 3.
The fuel is stored cooled in the storage tank 3. In the line 2, a pump 4 is arranged, which conveys the fuel from the storage tank 3 in the direction of the fuel tank column 1. A flow measuring device 5 is provided in the fuel tank column 1, which in the exemplary embodiment is a piston meter. Following the flow measuring device 5, a fuel nozzle 6 is connected to the fuel line 2 and ends in a fuel nozzle 7.

Die Gasrückführungsanlage (GRFA) verbindet die Zapfpistole 7 mit dem Tank 3. Hierzu weist die Zapfpistole 7 einen Saugrüssel 8 auf, der über einen Gasrückführungsschlauch 9 mit der Tanksäule 1 verbunden ist. Im Bereich der Tanksäule 1 ist der Schlauch 9 an eine Leitung 10 zur Gasrückführung angeschlossen. In der Leitung 10 ist eine Pumpe 11, die im Ausführungsbeispiel als Vakuumpumpe ausgebildet ist, angeordnet. Die Leitung 10 endet im Vorratstank 3. In Abwandlung des Ausführungsbeispiels kann das aufgefangene Gas auch in einem vom Vorratstank 3 separaten Tank gesammelt werden. Die Gasrückführungsanlage (GRFA) umfasst weiterhin eine Steuerelektronik 13, ein Magnetventil 15, das in der Leitung 10 angeordnet ist, sowie ein Netzteil 16.
An der Gasrückführungsanlage ist eine Vorrichtung 12 zur Überwachung der Gasrückführung vorgesehen. Die Vorrichtung 12 besteht im Wesentlichen aus einer Überwachungselektronik 14 für die Gasrückführung.
The gas recirculation system (GRFA) connects the fuel nozzle 7 to the tank 3. For this purpose, the fuel nozzle 7 has a suction nozzle 8, which is connected to the fuel pump 1 via a gas return hose 9. In the area of the tank column 1, the hose 9 is connected to a line 10 for gas recirculation. A pump 11, which in the exemplary embodiment is designed as a vacuum pump, is arranged in line 10. The line 10 ends in the storage tank 3. In a modification of the exemplary embodiment, the gas collected can also be collected in a tank separate from the storage tank 3. The gas recirculation system (GRFA) further comprises control electronics 13, a solenoid valve 15, which is arranged in line 10, and a power supply unit 16.
A device 12 for monitoring the gas recirculation is provided on the gas recirculation system. The device 12 essentially consists of monitoring electronics 14 for the gas recirculation.

Das Netzteil 16 weist einen geerdeten Anschluss PE und einen Wechselstromanschluss von 230 V auf (AC 230 V). Das Netzteil 16 steht einerseits mit der Steuerelektronik 13 in Verbindung, andererseits mit der Überwachungselektronik 14 für die Gasrückführung. Auch die Steuerelektronik 13 ist mit der Überwachungselektronik 14 für die Gasrückführung verbunden. Darüber hinaus steht die Steuerelektronik 13 mit dem Magnetventil 15 in Verbindung, das in der Leitung 10 der Gasrückführung angeordnet ist.
Die Überwachungselektronik 14 für die Gasrückführung weist ein Display 141 auf. Sie ist darüber hinaus mit Eingängen E1 bis E6, die zur Überwachung der an die einzelnen Eingänge angeschlossen Bauteile dienen, und mit Ausgängen A1 bis A4, die zur Steuerung der an die einzelnen Ausgänge angeschlossen Bauteile dienen, versehen.
The power supply 16 has a grounded PE connection and an AC connection of 230 V (AC 230 V). The power supply unit 16 is connected on the one hand to the control electronics 13, and on the other hand to the monitoring electronics 14 for the gas recirculation. The control electronics 13 are also connected to the monitoring electronics 14 for the gas recirculation. In addition, the control electronics 13 is connected to the solenoid valve 15, which is arranged in the line 10 of the gas recirculation.
The monitoring electronics 14 for the gas recirculation has a display 141. It is also equipped with inputs E1 to E6, which are used to monitor the components connected to the individual inputs, and outputs A1 to A4, which are used to control the components connected to the individual outputs.

Über den Eingang E1 ist die Verbindung mit der Steuerelektronik 13 hergestellt; mit dem Eingang E2 die Verbindung mit dem Netzteil 16. Ober die Verbindung des Netzteils 16 mit dem Eingang E2 wird die Vorrichtung 12, inklusive Überwachungselektronik 14 und der angeschlossenen Bauteile mit Strom aus dem Netzteil 16 gespeist. In der Verbindung von Netzteil 16 und Eingang E2 ist ein Reset-Taster S2 angeordnet, mit dem die Überwachung auf Null fahrbar ist. Der Eingang E3 verbindet die Überwachungselektronik 14 mit der in der Gasleitung 10 der Gasrückführung angeordneten Pumpe 11. In der Verbindung zwischen dem Eingang E3 der Elektronik 14 und der Pumpe 11 ist ein Unterdruckwächter 111 angeordnet. Der Unterdruckwächter 111 ist im Ausführungsbeispiel in Form eines Druckschalters ausgebildet und ist explosionsgeschützt. Der Unterdruckwächter 111 kann auch als Gasmesssonde ausgebildet sein, um analoge Messwerte des Gases ermitteln zu können. Der Eingang E4 ist an das Magnetventil 15 angeschlossen. Mit dem Eingang E5 ist die Überwachungselektronik 14 an einen, in der Zapfpistole 7 vorgesehenen Zapfventilschalter 71 und mit dem Eingang E6 an die Durchflussmesseinrichtung 5 angeschlossen.The connection to the control electronics 13 is established via the input E1; with the Input E2 the connection with the power supply 16. Via the connection of the power supply 16 with the input E2 is the device 12, including monitoring electronics 14 and connected components with power from the power supply 16. In the connection of Power supply 16 and input E2 a reset button S2 is arranged with which the monitoring is drivable to zero. The input E3 connects the monitoring electronics 14 with that in the Gas line 10 of the gas return arranged pump 11. In the connection between The input E3 of the electronics 14 and the pump 11 is a vacuum monitor 111 arranged. In the exemplary embodiment, the vacuum monitor 111 is in the form of a Pressure switch trained and is explosion-proof. The vacuum monitor 111 can also be designed as a gas measuring probe to determine analog measured values of the gas can. The input E4 is connected to the solenoid valve 15. With input E5 is the monitoring electronics 14 to one provided in the nozzle 7 Nozzle valve 71 and with input E6 to flow measuring device 5 connected.

Der Ausgang A1 ist mit einer im Ausführungsbeispiel grünen Kontrolleuchte L1 verbunden; der Ausgang A2 mit einer im Ausführungsbeispiel roten Kontrolleuchte L2. Die Kontrolleuchten L1 und L2 sind bevorzugt im sichtbaren Bereich an der Kraftstofftanksäule 1 angeordnet. Der Ausgang A3 verbindet die Überwachungselektronik 14 mit einem Schalter S1. An den Ausgang A4 ist ein akustischer Melder in Form einer Hupe H angeschlossen. Die Hupe H sollte möglichst so im Bereich der Kraftstofftanksäule 1 angeordnet sein, dass ihr Ertönen im gesamten Tankstellenbereich wahrnehmbar ist. An Stelle einer Hupe kann auch ein Voice Module vorgesehen sein.
Die Steuerelektronik 13 misst über ihre Verbindungen mit der Überwachungselektronik 14 die Kraftstoffmenge, die durch die Messeinrichtung 5 fliesst. Gleichzeitig steuert die Steuerelektronik 13 das Magnetventil 15 in der Gasleitung 10.
Bei fehlerfreier Funktion der Gasrückführung leuchtet die Kontrollleuchte L1. Die Kraftstofftankanlage mit der Gasrückführung sind bereit. Wird nun ein Tankvorgang begonnen und der Zapfventilschalter 71 an der Zapfpistole 7 betätigt, wird über den Eingang E5 ein Signal an die Überwachungselektronik 14 gesendet. Gleichzeitig werden durch den in Gang gesetzten Tankvorgang von der Durchflussmesseinrichtung 5 Impulse über den Eingang E6 an die Überwachungselektronik 14 weitergeleitet.
The output A1 is connected to a green indicator light L1 in the exemplary embodiment; the output A2 with a red indicator light L2 in the exemplary embodiment. The control lights L1 and L2 are preferably arranged in the visible area on the fuel tank column 1. The output A3 connects the monitoring electronics 14 to a switch S1. An acoustic detector in the form of a horn H is connected to the output A4. The horn H should, if possible, be arranged in the area of the fuel tank column 1 such that it can be heard in the entire area of the gas station. A voice module can also be provided instead of a horn.
The control electronics 13 measure the amount of fuel flowing through the measuring device 5 via their connections to the monitoring electronics 14. At the same time, the control electronics 13 controls the solenoid valve 15 in the gas line 10.
If the gas recirculation is functioning correctly, the control lamp L1 lights up. The fuel tank system with the gas recirculation are ready. If a fueling process is now started and the nozzle valve 71 on the nozzle 7 is actuated, a signal is sent to the monitoring electronics 14 via the input E5. At the same time, 5 pulses are forwarded by the flow measuring device via the input E6 to the monitoring electronics 14 as a result of the fueling process being started.

Mit Hilfe des Unterdruckwächters 111 bzw. der Gas messsonde wird der Durchfluss des Gases, das in der Regel aus Kraftstoffdämpfen und einem Luftgemisch besteht, durch die Vakuumpumpe 11 gemessen. Die Durchflussmenge des Gases ist abhängig von der Durchflussmenge des Kraftstoffs, die mittels der Durchflussmesseinrichtung 5 ermittelt wird. Die Vorrichtung 12, die über die Eingänge E3 und E6 die Durchflussmengen an Gas und Kraftstoff misst, vergleicht die ermittelten Werte miteinander. Die Werte weisen bei normaler Funktion der Gasrückführung eine gewisse Proportionalität zueinander auf. With the help of the vacuum switch 111 or the gas measuring probe, the flow of the Gas, which usually consists of fuel vapors and an air mixture, through which Vacuum pump 11 measured. The flow rate of the gas depends on the Flow rate of the fuel, which is determined by means of the flow measuring device 5. The device 12, via the inputs E3 and E6, the flow rates of gas and Fuel measures, compares the determined values with each other. The values point at normal Function of the gas recirculation to a certain proportionality to each other.

Stellt die Vorrichtung 12 beim Vergleich der Mengen einen signifikanten Unterschied zwischen dem theoretisch anfallenden Wert der Gasdurchflussmenge in Abhängigkeit einer bestimmten Kraftstoffdurchflussmenge und dem tatsächlichen Wert der Gasdurchflussmenge fest - beispielsweise bei Ausfall der Vakuumpumpe 11, der Steuerelektronik 13 oder des Magnetventils 15 -, wird ein Signal an die Leuchte L1 gesendet, so dass diese erlischt wobei die Kontrolleuchte L2 zu leuchten beginnt. Durch den Schalter S1 kann die Tanksäule automatisch nach Beendigung des laufenden Tankvorgangs abgeschaltet werden. Im Display 141 erscheint eine Fehlerdiagnose.
Parallel zu der Warnung durch die Kontrolleuchte L2 sowie der Fehlerdiagnose mittels des Displays 141 leitet die Überwachungselektronik 14 ein Signal an den Ausgang A4, um eine akustische Meldung freizugeben.
Mit Hilfe der Vorrichtung ist ein automatisches Abschalten der Tankanlage bei Ausfall der Gasrückführung möglich. Dadurch wird ein unkontrollierter und unbemerkter Austritt der umwelt- und gesundheitsschädlichen Gase verhindert. Darüber hinaus ist die Möglichkeit geschaffen, im Falle einer Funktionsstörung mit Hilfe des Displays auf einfache Weise eine Fehlerdiagnose durchzuführen.
If the device 12 determines a significant difference between the theoretically occurring value of the gas flow rate as a function of a certain fuel flow rate and the actual value of the gas flow rate - for example in the event of failure of the vacuum pump 11, the control electronics 13 or the solenoid valve 15 - a signal is generated sent to the light L1 so that it goes out and the control light L2 starts to light up. With the switch S1, the fuel pump can be switched off automatically after the ongoing fueling process. An error diagnosis appears on display 141.
In parallel with the warning by the control lamp L2 and the fault diagnosis by means of the display 141, the monitoring electronics 14 conduct a signal to the output A4 in order to release an acoustic message.
With the aid of the device, the tank system can be switched off automatically if the gas recirculation fails. This prevents an uncontrolled and unnoticed escape of the gases, which are harmful to the environment and human health. In addition, it is possible to easily carry out a fault diagnosis using the display in the event of a malfunction.

Claims (4)

  1. An apparatus for monitoring vapour recovery for fuel dispensing installations (1), comprising a line (10) connected at one end to a dispensing nozzle (7) and at the other end to a tank (3) and in which a pump (11) is arranged, the dispensing nozzle (7) having a suction sheath (8) which is connected to the tank (3) via the line (10), characterised in that the apparatus includes an electronic monitoring unit (14) for checking the operation of the of the vapour recovery system and having inputs (E1, ..., E6) and outputs (A1, ..., A4), which electronic monitoring unit (14) includes a display (141), and in that a vapour measuring probe (111) is connected to one of the inputs (E3).
  2. Apparatus according to claim 1, characterised in that indicator lights (L1, L2) are connected to the outputs (A1, A2).
  3. Apparatus according to claim 1 or 2, characterised in that an acoustic signalling device is connected to the output (A4).
  4. Apparatus according to any one of claims 1 to 3, characterised in that a switch (S1) is connected to the output (A3).
EP99125025A 1999-08-17 1999-12-15 Control device for fuel vapour recovery Expired - Lifetime EP1077197B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE1999138918 DE19938918A1 (en) 1999-08-17 1999-08-17 Monitoring system for gas feedback at roadside petrol pumps; has control lamps or indicators, which are mounted at visible region of petrol pump, and which act to diagnose or to indicate faults
DE29914372U 1999-08-17
DE19938918 1999-08-17
DE29914372U DE29914372U1 (en) 1999-08-17 1999-08-17 Gas recirculation monitoring device on petrol pumps

Publications (2)

Publication Number Publication Date
EP1077197A1 EP1077197A1 (en) 2001-02-21
EP1077197B1 true EP1077197B1 (en) 2004-03-10

Family

ID=26054629

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99125025A Expired - Lifetime EP1077197B1 (en) 1999-08-17 1999-12-15 Control device for fuel vapour recovery

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EP (1) EP1077197B1 (en)
AT (1) ATE261397T1 (en)
DE (1) DE59908813D1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5355915A (en) * 1990-12-11 1994-10-18 Gilbarco Vapor recovery improvements

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5040577A (en) * 1990-05-21 1991-08-20 Gilbarco Inc. Vapor recovery system for fuel dispenser
DE9206675U1 (en) * 1992-05-16 1993-06-17 Leybold AG, 6450 Hanau Device for extracting fuel vapors
US5269353A (en) * 1992-10-29 1993-12-14 Gilbarco, Inc. Vapor pump control
DE4313720C1 (en) * 1993-04-27 1994-10-06 Anton Ellinghaus Maschinenfabr Arrangement for ensuring the presence and attention of monitoring personnel when mineral oil products are discharged
DE29521160U1 (en) * 1995-07-11 1996-11-14 Honeywell Ag, 63067 Offenbach Device for operating a tank system
FR2737717B1 (en) * 1995-08-10 1997-09-12 Schlumberger Ind Sa PROCESS FOR RECOVERING VAPOR EMITTED FROM A LIQUID DELIVERY SYSTEM
US5860457A (en) * 1995-08-15 1999-01-19 Dresser Industries Gasoline vapor recovery system and method utilizing vapor detection

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
US5355915A (en) * 1990-12-11 1994-10-18 Gilbarco Vapor recovery improvements

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
California Environmental Protection Agency - Executive order G-70-154-AA *

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Publication number Publication date
ATE261397T1 (en) 2004-03-15
DE59908813D1 (en) 2004-04-15
EP1077197A1 (en) 2001-02-21

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