EP0473818A1 - Device for controlling the supply of liquid fuels to a flow measuring instrument - Google Patents
Device for controlling the supply of liquid fuels to a flow measuring instrument Download PDFInfo
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- EP0473818A1 EP0473818A1 EP90116933A EP90116933A EP0473818A1 EP 0473818 A1 EP0473818 A1 EP 0473818A1 EP 90116933 A EP90116933 A EP 90116933A EP 90116933 A EP90116933 A EP 90116933A EP 0473818 A1 EP0473818 A1 EP 0473818A1
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- Prior art keywords
- fuel
- nozzle
- gas
- valve
- sensor
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- 239000000446 fuel Substances 0.000 title claims abstract description 69
- 239000007788 liquid Substances 0.000 title claims abstract description 4
- 238000011156 evaluation Methods 0.000 claims abstract description 12
- 238000007620 mathematical function Methods 0.000 claims description 3
- 230000001419 dependent effect Effects 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000013461 design Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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Classifications
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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
- B67D7/06—Details or accessories
- B67D7/76—Arrangements of devices for purifying liquids to be transferred, e.g. of filters, of air or water separators
- B67D7/763—Arrangements of devices for purifying liquids to be transferred, e.g. of filters, of air or water separators of air separators
Definitions
- the invention relates to a device for regulating the supply of liquid fuels to a quantity measuring device for the delivery of the fuels with a gas separator arranged between a fuel pump and the quantity measuring device and with a valve which interrupts the inflow to the quantity measuring device and which, depending on the gas content, produces a valve generated by a nozzle Fuel jet is controlled, which branches off from the fuel flow behind the pressure port of the fuel pump.
- a device of the type described above is known from the Austrian patent specification 227 112.
- This known device prevents the quantity measuring device, for example a known piston counter, from being supplied with fuel mixed with gas bubbles and accordingly an incorrect quantity of fuel being measured.
- a fuel jet is branched off from the fuel flow behind the pressure port of the fuel pump for this purpose, which is directed at a spring-loaded piston valve, which in turn controls a differential shut-off valve which is arranged between the fuel pump and the flow meter.
- the bundled jet causes such a load on the piston spool that it is moved against the force of the spring loading it into a position in which the piston spool the differential shut-off valve in such a way controls that this releases the inflow to the flow meter.
- the fuel jet contains a gas bubble fraction that exceeds a predetermined value
- the force exerted on the piston valve by the fuel jet diverging as a result of the gas fraction is no longer sufficient to move it against the force of the spring loaded to the position mentioned above.
- the spring pushes the spool into a position in which it closes the differential shut-off valve.
- the fuel flow generated by the fuel pump to the quantity measuring device is consequently interrupted until the proportion of gas bubbles returns to a permissible value, which is separated in the gas separator.
- both the spring-loaded piston valve and the differential shut-off valve controlled by this have a complicated structure, which not only requires a relatively expensive production, but also a complex adjustment work.
- the effect of both components is wear-dependent, so that in addition to regular maintenance work, the wear parts must be replaced on a regular basis.
- the invention has for its object to develop a device of the type described in such a way that the use of wear-free and simpler components results in a cheaper production of the device while increasing its functional reliability.
- the solution to this problem by the invention is characterized in that the nozzle is directed to a sensor converting the pressure of the fuel jet into an electrical signal, which controls the valve designed as a solenoid valve in the line leading to the quantity measuring device via an electrical evaluation circuit.
- the senor is formed by a piezo element which, according to a further feature of the invention, is arranged behind a calibrated opening.
- the diameter of the calibrated opening corresponds to the diameter of the bundled fuel jet generated by the nozzle, as long as it does not contain any gas bubbles. This results in very reliable monitoring of the proportion of gas bubbles in the fuel flow generated by the fuel pump.
- the nozzle is arranged in the fuel outlet area of the gas separator.
- the fuel jet used to control the solenoid valve is thus branched off at a point on the gas separator where the fuel supplied to the quantity measuring device may normally no longer contain any gas bubbles. In this way, the effect of the gas separator is monitored with the device according to the invention.
- the gas separator has a tubular housing provided with a tangential inlet and outlet and a gas collecting tube penetrating the outlet and projecting centrally into the tubular housing, the nozzle being arranged in the outlet of the tubular housing. Due to the tangential inlet and outlet, a swirl is generated in the tubular housing of the gas separator, which ensures that the fuel supplied to the gas separator flows through the tubular housing on a helical path, whereas the gas portion in collects the center of the tubular housing so that the gas can be drawn off via the centrally arranged gas collecting tube.
- the nozzle in the outlet of the tubular housing for generating the fuel jet is normally supplied with degassed fuel in this way, so that the solenoid valve is only closed via the sensor acted upon by the fuel jet if the proportion of gas bubbles in the outlet of the gas separator exceeds the permissible value .
- the invention proposes to design the electronic evaluation circuit as a microcomputer which, in order to control the solenoid valve, evaluates the pressure curve recorded by the sensor over time in comparison with values stored in a table or calculated on the basis of mathematical functions. In this way, it is possible with the invention to disregard short-term disruptions in the gas separation if the disruptions are those which have no significant influence on the fuel quantities determined by the quantity measuring device.
- FIGS. 1 and 2 shows a lower housing part 1, in which a fuel pump 2 designed as a cell pump is arranged.
- This fuel pump 2 which is driven by an engine (not shown), conveys the fuel emerging from the pressure connection 3 of the fuel pump 2 into a gas separator 4 which is arranged within an upper housing part 5 placed on the lower housing part 1.
- the gas separator 4 has a tubular housing 6 which is connected to the pressure port 3 of the fuel pump 2 by means of a tangential inlet 7.
- the fuel emerging from the pressure port 3 of the fuel pump 2 is therefore given a swirl so that the fuel flows through the tubular housing 6 along a helical path, as shown in FIG.
- an outlet 8 is provided, which supplies the fuel to a connecting channel 9 in the lower housing part.
- the generation of the swirl in the inlet 7 can best be seen in FIG. 2, which among other things shows a partial section through the inlet 7.
- any gas bubbles present in the fuel are concentrated in the center of the tubular housing 6, as is indicated in FIG.
- These gas bubbles are withdrawn from the fuel through a gas collecting tube 10 which penetrates the outlet 8 and projects centrally into the tubular housing 6 and which is connected at its end mounted in the outlet 8 via an opening 11 to the gas collecting space formed by the housing upper part 5.
- the gas extracted from the fuel is discharged from this gas collecting space via a discharge line 12.
- the degassed fuel entering the connecting channel 9 is fed via a valve designed as a solenoid valve 13 to a quantity measuring device not shown in the drawing.
- This solenoid valve 13 interrupts the inflow to the quantity measuring device as soon as the gas portion of the fuel leaving the gas separator 4 exceeds a permissible value.
- a fuel jet is generated within the gas separator 4 by a nozzle 14, which controls the solenoid valve 13 in the line running from the gas separator 4 to the quantity measuring device.
- the fuel jet generated by the nozzle 14 is directed at a sensor 15, which is preferably formed by a piezo element.
- This sensor 15 is able to convert the pressure of the fuel jet into an electrical signal, which is fed to an electronic evaluation circuit 17 via a measuring line 16.
- This electronic evaluation circuit 17 is preferably a microcomputer which controls the solenoid valve 13 via a control line 18.
- the pressure of the jet impinging on the sensor 15 generates an electrical signal which is recognized in the evaluation circuit 17 as a signal for keeping the solenoid valve 13 open.
- the fuel jet generated by the nozzle 14 contains a larger proportion of gas, the otherwise bundled fuel jet expands, which leads to a reduction in the pressure exerted on the sensor 15.
- the sensor 15 therefore sends a reduced signal to the evaluation circuit 17 via the measuring line 16, which, after checking this signal, closes the solenoid valve 13 via the control line 18 as long as the pressure drop determined by the sensor 15 continues. This prevents fuel with an increased gas content from being supplied to the quantity measuring device connected downstream of the solenoid valve 13, which results in incorrect measured values for the quantity measurement.
- the senor 15 which is preferably formed by a piezo element, can be arranged behind a calibrated opening 19 which, in the exemplary embodiment according to FIG. 1, is formed inside the wall of the upper housing part 5.
- the electronic evaluation circuit 17 formed by a microcomputer is also able, with a corresponding design, not only to evaluate the directly recorded electrical signals resulting from the pressure of the fuel jet, but also the pressure curve recorded by the sensor 15 over time in comparison with that stored in a table or values calculated on the basis of mathematical functions. In this way it is possible to recognize short-term pressure drops at the sensor 15 as such and to avoid unnecessary brief opening and closing of the solenoid valve 13.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Measuring Volume Flow (AREA)
- Sampling And Sample Adjustment (AREA)
- Feeding And Controlling Fuel (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
Description
Die Erfindung betrifft eine Vorrichtung zur Regelung der Zufuhr von flüssigen Kraftstoffen zu einem Mengenmeßgerät für die Abgabe der Kraftstoffe mit einem zwischen einer Kraftstoffpumpe und dem Mengenmeßgerät angeordneten Gasabscheider und mit einem den Zufluß zum Mengenmeßgerät unterbrechenden Ventil, das in Abhängigkeit vom Gasanteil eines durch eine Düse erzeugten Kraftstoffstrahls gesteuert ist, der vom Kraftstofffluß hinter dem Druckstutzen der Kraftstoffpumpe abzweigt.The invention relates to a device for regulating the supply of liquid fuels to a quantity measuring device for the delivery of the fuels with a gas separator arranged between a fuel pump and the quantity measuring device and with a valve which interrupts the inflow to the quantity measuring device and which, depending on the gas content, produces a valve generated by a nozzle Fuel jet is controlled, which branches off from the fuel flow behind the pressure port of the fuel pump.
Eine Vorrichtung der voranstehend beschriebenen Art ist aus der österreichischen Patentschrift 227 112 bekannt. Diese bekannte Vorrichtung verhindert, daß dem Mengenmeßgerät, beispielsweise einem bekannten Kolbenzähler, mit Gasblasen durchsetzter Kraftstoff zugeführt und dementsprechend eine falsche Kraftstoffmenge gemessen wird. Bei der bekannten Vorrichtung wird zu diesem Zweck vom Kraftstofffluß hinter dem Druckstutzen der Kraftstoffpumpe ein Kraftstoffstrahl abgezweigt, der auf einen federbelasteten Kolbenschieber gerichtet ist, der seinerseits ein Differential-Absperrventil steuert, das zwischen der Kraftstoffpumpe und dem Mengenmeßgerät angeordnet ist. Sofern der durch eine Düse erzeugte Kraftstoffstrahl keinen bzw. einen vernachlässigbar kleinen Gasanteil enthält, bewirkt der gebündelte Strahl eine derartige Belastung des Kolbenschiebers, daß dieser entgegen der Kraft der ihn belastenden Feder in eine Stellung überführt wird, in der der Kolbenschieber das Differential-Absperrventil derart steuert, daß dieses den Zufluß zum Mengenmeßgerät freigibt. Enthält der Kraftstoffstrahl jedoch einen einen vorgegebenen Wert übersteigenden Gasblasenanteil, reicht die durch den infolge des Gasanteils divergierenden Kraftstoffstrahl auf den Kolbenschieber ausgeübte Kraft nicht mehr aus, diesen entgegen der Kraft der ihn belasteten Feder in die voranstehend erwähnte Stellung zu überführen. Die Feder drückt den Kolbenschieber in eine Stellung, in der dieser das Differential-Absperrventil schließt. Der von der Kraftstoffpumpe erzeugte Kraftstofffluß zum Mengenmeßgerät wird demzufolge so lange unterbrochen, bis der Gasblasenanteil auf einen zulässigen Wert zurückgeht, der im Gasabscheider abgeschieden wird.A device of the type described above is known from the Austrian patent specification 227 112. This known device prevents the quantity measuring device, for example a known piston counter, from being supplied with fuel mixed with gas bubbles and accordingly an incorrect quantity of fuel being measured. In the known device, a fuel jet is branched off from the fuel flow behind the pressure port of the fuel pump for this purpose, which is directed at a spring-loaded piston valve, which in turn controls a differential shut-off valve which is arranged between the fuel pump and the flow meter. If the fuel jet generated by a nozzle contains no or a negligibly small proportion of gas, the bundled jet causes such a load on the piston spool that it is moved against the force of the spring loading it into a position in which the piston spool the differential shut-off valve in such a way controls that this releases the inflow to the flow meter. However, if the fuel jet contains a gas bubble fraction that exceeds a predetermined value, the force exerted on the piston valve by the fuel jet diverging as a result of the gas fraction is no longer sufficient to move it against the force of the spring loaded to the position mentioned above. The spring pushes the spool into a position in which it closes the differential shut-off valve. The fuel flow generated by the fuel pump to the quantity measuring device is consequently interrupted until the proportion of gas bubbles returns to a permissible value, which is separated in the gas separator.
Bei der bekannten Vorrichtung hat sowohl der federbelastete Kolbenschieber als auch das von diesem gesteuerte Differential-Absperrventil einen komplizierten Aufbau, der nicht nur eine verhältnismäßig teure Herstellung, sondern auch eine aufwendige Einstellarbeit erfordert. Darüber hinaus ist die Wirkung beider Bauteile verschleißabhängig, so daß außer regelmäßigen Wartungsarbeiten ein turnusmäßiger Austausch der Verschleißteile durchgeführt werden muß.In the known device, both the spring-loaded piston valve and the differential shut-off valve controlled by this have a complicated structure, which not only requires a relatively expensive production, but also a complex adjustment work. In addition, the effect of both components is wear-dependent, so that in addition to regular maintenance work, the wear parts must be replaced on a regular basis.
Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung der eingangs beschriebenen Art derart weiterzubilden, daß sich durch Verwendung verschleißfreier und einfacherer Bauteile eine preisgünstigere Herstellung der Vorrichtung bei gleichzeitiger Erhöhung ihrer Funktionssicherheit ergibt.The invention has for its object to develop a device of the type described in such a way that the use of wear-free and simpler components results in a cheaper production of the device while increasing its functional reliability.
Die Lösung dieser Aufgabenstellung durch die Erfindung ist dadurch gekennzeichnet, daß die Düse auf einen den Druck des Kraftstoffstrahls in ein elektrisches Signal umwandelnden Sensor gerichtet ist, der das als Magnetventil ausgebildete Ventil in der zum Mengenmeßgerät führenden Leitung über eine elektrische Auswerteschaltung steuert.The solution to this problem by the invention is characterized in that the nozzle is directed to a sensor converting the pressure of the fuel jet into an electrical signal, which controls the valve designed as a solenoid valve in the line leading to the quantity measuring device via an electrical evaluation circuit.
Durch die Verwendung eines den Druck des Kraftstoffstrahls in ein elektrisches Signal umwandelnden Sensors, der über eine elektronische Auswerteschaltung das in der zum Mengenmeßgerät führenden Leitung angeordnete Magnetventil steuert, ergibt sich eine wesentlich einfachere und damit preiswertere Ausgestaltung der Vorrichtung, wobei die verschleißfreie Wirkung des Sensors zugleich die funktionssicherheit der erfindungsgemäßen Vorrichtung erhöht.The use of a sensor converting the pressure of the fuel jet into an electrical signal, which controls the solenoid valve arranged in the line leading to the quantity measuring device via an electronic evaluation circuit, results in a much simpler and therefore less expensive design of the device, with the wear-free effect of the sensor at the same time the functional reliability of the device according to the invention is increased.
Bei einer bevorzugten Ausführung der Erfindung ist der Sensor durch ein Piezo-Element gebildet, das gemäß einem weiteren Merkmal der Erfindung hinter einer kalibrierten Öffnung angeordnet ist. Der Durchmesser der kalibrierten Öffnung entspricht hierbei dem Durchmesser des durch die Düse erzeugten, gebündelten Kraftstoffstrahls, solange dieser keinen Gasblasenanteil enthält. Hierdurch ergibt sich eine sehr zuverlässige Überwachung des Gasblasenanteils in dem von der Kraftstoffpumpe erzeugten Kraftstofffluß.In a preferred embodiment of the invention, the sensor is formed by a piezo element which, according to a further feature of the invention, is arranged behind a calibrated opening. The diameter of the calibrated opening corresponds to the diameter of the bundled fuel jet generated by the nozzle, as long as it does not contain any gas bubbles. This results in very reliable monitoring of the proportion of gas bubbles in the fuel flow generated by the fuel pump.
Gemäß einem weiteren Merkmal der Erfindung ist die Düse im Kraftstoffaustrittsbereich des Gasabscheiders angeordnet. Der zur Steuerung des Magnetventils verwendete Kraftstoffstrahl wird somit an einer Stelle des Gasabscheiders abgezweigt, an der der zum Mengenmeßgerät geführte Kraftstoff normalerweise keinen Gasblasenanteil mehr enthalten darf. Auf diese Weise wird mit der erfindungsgemäßen Vorrichtung zugleich die Wirkung das Gasabscheiders überwacht.According to a further feature of the invention, the nozzle is arranged in the fuel outlet area of the gas separator. The fuel jet used to control the solenoid valve is thus branched off at a point on the gas separator where the fuel supplied to the quantity measuring device may normally no longer contain any gas bubbles. In this way, the effect of the gas separator is monitored with the device according to the invention.
Bei einer bevorzugten Ausführung der erfindungsgemäßen Vorrichtung weist der Gasabscheider ein mit einem tangentialen Zulauf und Ablauf versehenes rohrförmiges Gehäuse und ein den Ablauf durchdringendes, zentrisch in das rohrförmige Gehäuse hineinragendes Gassammelrohr auf, wobei die Düse im Ablauf des rohrförmigen Gehäuses angeordnet ist. Durch den tangentialen Zu- und Ablauf wird im rohrförmigen Gehäuse des Gasabscheiders ein Drall erzeugt, der dafür sorgt, daß der dem Gasabscheider zugeführte Kraftstoff das rohrförmige Gehäuse auf einer wendelförmigen Bahn durchströmt, wogegen sich der Gasanteil in der Mitte des rohrförmigen Gehäuses sammelt, so daß das Gas über das zentrisch angeordnete Gassammelrohr abgezogen werden kann. Die im Ablauf des rohrförmigen Gehäuses angeordnete Düse zur Erzeugung des Kraftstoffstrahls wird auf diese Weise im Normalfall mit entgastem Kraftstoff beschickt, so daß über den vom Kraftstoffstrahl beaufschlagten Sensor ein Schließen des Magnetventils nur dann erfolgt, wenn der Gasblasenanteil im Ablauf des Gasabscheiders den zulässigen Wert übersteigt.In a preferred embodiment of the device according to the invention, the gas separator has a tubular housing provided with a tangential inlet and outlet and a gas collecting tube penetrating the outlet and projecting centrally into the tubular housing, the nozzle being arranged in the outlet of the tubular housing. Due to the tangential inlet and outlet, a swirl is generated in the tubular housing of the gas separator, which ensures that the fuel supplied to the gas separator flows through the tubular housing on a helical path, whereas the gas portion in collects the center of the tubular housing so that the gas can be drawn off via the centrally arranged gas collecting tube. The nozzle in the outlet of the tubular housing for generating the fuel jet is normally supplied with degassed fuel in this way, so that the solenoid valve is only closed via the sensor acted upon by the fuel jet if the proportion of gas bubbles in the outlet of the gas separator exceeds the permissible value .
Mit der Erfindung wird schließlich vorgeschlagen, die elektronische Auswerteschaltung als Mikrocomputer auszubilden, der zur Steuerung des Magnetventils den vom Sensor aufgenommenen Druckverlauf über der Zeit im Vergleich zu tabellarisch gespeicherten oder aufgrund mathematischer Funktionen errechneten Werten auswertet. Auf diese Weise ist es mit der Erfindung möglich, kurzfristige Störungen bei der Gasabscheidung dann unberücksichtigt zu lassen, wenn es sich um Störungen handelt, die keinen ins Gewicht fallenden Einfluß auf die vom Mengenmeßgerät festgestellten Kraftstoffmengen haben.Finally, the invention proposes to design the electronic evaluation circuit as a microcomputer which, in order to control the solenoid valve, evaluates the pressure curve recorded by the sensor over time in comparison with values stored in a table or calculated on the basis of mathematical functions. In this way, it is possible with the invention to disregard short-term disruptions in the gas separation if the disruptions are those which have no significant influence on the fuel quantities determined by the quantity measuring device.
Auf der Zeichnung ist ein Ausführungsbeispiel der erfindungsgemäßen Vorrichtung dargestellt, und zwar zeigen:
- Fig. 1 eine teilweise geschnittene Seitenansicht eines Ausführungsbeispiels der erfindungsgemäßen Vorrichtung und
- Fig. 2 einen Querschnitt gemäß der Schnittlinie 11 - 11 in Fig.1, wobei in diesem Querschnitt der Schnittverlauf für den Teilschnitt I - in Fig.1 eingetragen ist.
- Fig. 1 is a partially sectioned side view of an embodiment of the device according to the invention and
- 2 shows a cross section along the section line 11-11 in FIG. 1, the section profile for the partial section I in FIG. 1 being entered in this cross section.
Das in den Figuren 1 und 2 dargestellte Ausführungsbeispiel zeigt ein Gehäuseunterteil 1, in dem eine als Zellenpumpe ausgebildete Kraftstoffpumpe 2 angeordnet ist. Diese von einem nicht dargestellten Motor angetriebe Kraftstoffpumpe 2 fördert den aus dem Druckstutzen 3 der Kraftstoffpumpe 2 austretenden Kraftstoff in einen Gasabscheider 4, der innerhalb eines auf das Gehäuseunterteil 1 aufgesetzten Gehäuseoberteils 5 angeordnet ist.The exemplary embodiment shown in FIGS. 1 and 2 shows a
Der Gasabscheider 4 weist ein rohrförmiges Gehäuse 6 auf, das mittels eines tangentialen Zulaufes 7 an den Druckstutzen 3 der Kraftstoffpumpe 2 angeschlossen ist. Dem aus dem Druckstutzen 3 der Kraftstoffpumpe 2 austretenden Kraftstoff wird demzufolge ein Drall erteilt, so daß der Kraftstoff entlang einer wendelförmig verlaufenden Bahn das rohrförmige Gehäuse 6 durchströmt, wie dies in Fig.1 dargestellt ist. Am anderen Ende des rohrförmigen Gehäuses 6 ist ein Ablauf 8 vorgesehen, der den Kraftstoff einem Verbindungskanal 9 im Gehäuseunterteil zuführt. Die Erzeugung des Dralls im Zulauf 7 ist am besten in Fig.2 zu erkennen, die unter anderem einen Teilschnitt durch den Zulauf 7 zeigt.The
Durch die Drallerzeugung im Zulauf des rohrförmigen Gehäuses 6 konzentrieren sich etwaige im Kraftstoff vorhandene Gasblasen in der Mitte des rohrförmigen Gehäuses 6, wie dies in Fig.1 angedeutet ist. Diese Gasblasen werden aus dem Kraftstoff durch ein den Ablauf 8 durchdringendes, zentrisch in das rohrförmige Gehäuse 6 hineinragendes Gassammelrohr 10 abgezogen, das an seinem im Ablauf 8 gelagerten Ende über eine Öffnung 11 mit dem durch das Gehäuseoberteil 5 gebildeten Gassammelraum verbunden ist. Aus diesem Gassammelraum wird das dem Kraftstoff entzogene Gas über eine Abführleitung 12 abgeführt. Der in den Verbindungskanal 9 eintretende, entgaste Kraftstoff wird über ein als Magnetventil 13 ausgebildetes Ventil einem auf der Zeichnung nicht dargestellten Mengenmeßgerät zugeführt.Due to the swirl generation in the inlet of the
Dieses Magnetventil 13 unterbricht den Zufluß zum Mengenmeßgerät, sobald der Gasanteil des den Gasabscheider 4 verlassenden Kraftstoffes einen zulässigen Wert übersteigt. Zu diesem Zweck wird innerhalb des Gasabscheiders 4 von einer Düse 14 ein Kraftstoffstrahl erzeugt, der das Magnetventil 13 in der vom Gasabscheider 4 zum Mengenmeßgerät verlaufenden Leitung steuert. Wie aus Fig.1 hervorgeht, ist der durch die Düse 14 erzeugte Kraftstoffstrahl auf einen Sensor 15 gerichtet, der vorzugsweise durch ein Piezo-Element gebildet wird. Dieser Sensor 15 ist in der Lage, den Druck des Kraftstoffstrahls in ein elektrisches Signal umzuwandeln, das über eine Meßleitung 16 einer elektronischen Auswerteschaltung 17 zugeführt wird. Bei dieser elektronischen Auswerteschaltung 17 handelt es sich vorzugsweise um einen Mikrocomputer, der über eine Steuerleitung 18 das Magnetventil 13 steuert.This
Solange in dem von der Düse 14 erzeugten Kraftstoffstrahl kein oder nur ein vernachlässigbar kleiner Gasanteil enthalten ist, erzeugt der Druck des auf den Sensor 15 auftreffenden Strahles ein elektrisches Signal, das in der Auswerteschaltung 17 als Signal zum Offenhalten des Magnetventils 13 erkannt wird. Enthält der von der Düse 14 erzeugte Kraftstoffstrahl jedoch einen größeren Gasanteil, tritt eine Aufweitung des ansonsten gebündelten Kraftstoffstrahles ein, die zu einer Reduzierung des auf den Sensor 15 ausgeübten Drukkes führt. Der Sensor 15 gibt über die Meßleitung 16 demzufolge ein reduziertes Signal an die Auswerteschaltung 17, die nach Überprüfen dieses Signales über die Steuerleitung 18 das Magnetventil 13 so lange schließt, wie der vom Sensor 15 ermittelte Druckabfall anhält. Hierdurch wird verhindert, daß dem dem Magnetventil 13 nachgeschalteten Mengenmeßgerät Kraftstoff mit einem erhöhten Gasanteil zugeführt wird, wodurch sich falsche Meßwerte der Mengenmessung ergeben.As long as the fuel jet generated by the
Um die Empfindlichkeit des Sensors 15 zu erhöhen, kann der vorzugsweise durch ein Piezo-Element gebildete Sensor 15 hinter einer kalibrierten Öffnung 19 angeordnet sein, die beim Ausführungsbeispiel nach Fig.1 innerhalb der Wand des Gehäuseoberteils 5 ausgebildet ist. Die durch einen Mikrocomputer gebildete elektronische Auswerteschaltung 17 ist darüber hinaus bei entsprechender Ausgestaltung in der Lage, nicht nur die unmittelbar aufgenommenen, aus dem Druck des Kraftstoffstrahls resultierenden elektrischen Signale auszuwerten, sondern auch den vom Sensor 15 aufgenommenen Druckverlauf über der Zeit im Vergleich zu tabellarisch gespeicherten oder aufgrund mathematischer Funktionen errechneten Werten. Auf diese Weise ist es möglich, kurzzeitige Druckabfälle am Sensor 15 als solche zu erkennen und ein unnötiges kurzzeitiges Öffnen und Schließen des Magnetventils 13 zu vermeiden.In order to increase the sensitivity of the
- 1 Gehäuseunterteil1 lower housing part
- 2 Kraftstoffpumpe2 fuel pump
- 3 Druckstutzen3 pressure ports
- 4 Gasabscheider4 gas separators
- 5 Gehäuseoberteil5 upper housing part
- 6 rohrförmiges Gehäuse6 tubular housing
- 7 Zulauf7 inflow
- 8 Ablauf8 process
- 9 Verbindungskanal9 connecting channel
- 10 Gassammelrohr10 gas manifold
- 11 Öffnung11 opening
- 12 Abführleitung12 discharge line
- 13 Magnetventil13 solenoid valve
- 14 Düse14 nozzle
- 15 Sensor15 sensor
- 16 Meßleitung16 measuring line
- 17 Auswerteschaltung17 evaluation circuit
- 18 Steuerleitung18 control line
- 19 kalibrierte Öffnung19 calibrated opening
Claims (6)
dadurch gekennzeichnet,
daß die Düse (14) auf einen den Druck des Kraftstoffstrahls in ein elektrisches Signal umwandelnden Sensor (15) gerichtet ist, der das als Magnetventil (13) ausgebildete Ventil in der zum Mengenmeßgerät führenden Leitung über eine elektronische Auswerteschaltung (17) steuert.1. Device for regulating the supply of liquid fuels to a quantity measuring device for the delivery of the fuels with a gas separator (4) arranged between a fuel pump (2) and the quantity measuring device and with a valve (13) which interrupts the inflow to the quantity measuring device and which is dependent is controlled by the gas portion of a fuel jet generated by a nozzle (14), which branches off from the fuel flow behind the pressure port (3) of the fuel pump (2),
characterized,
that the nozzle (14) is directed to a sensor (15) converting the pressure of the fuel jet into an electrical signal, which controls the valve designed as a solenoid valve (13) in the line leading to the quantity measuring device via an electronic evaluation circuit (17).
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP90116933A EP0473818B1 (en) | 1990-09-04 | 1990-09-04 | Device for controlling the supply of liquid fuels to a flow measuring instrument |
| AT90116933T ATE90070T1 (en) | 1990-09-04 | 1990-09-04 | DEVICE FOR ADJUSTING THE SUPPLY OF LIQUID FUEL TO A METER. |
| DE9090116933T DE59001631D1 (en) | 1990-09-04 | 1990-09-04 | DEVICE FOR REGULATING THE SUPPLY OF LIQUID FUELS TO A QUANTITY MEASURING DEVICE. |
| ES199090116933T ES2042163T3 (en) | 1990-09-04 | 1990-09-04 | DEVICE FOR THE REGULATION OF THE FEEDING OF LIQUID FUELS TO A QUANTITY MEASURING DEVICE. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP90116933A EP0473818B1 (en) | 1990-09-04 | 1990-09-04 | Device for controlling the supply of liquid fuels to a flow measuring instrument |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0473818A1 true EP0473818A1 (en) | 1992-03-11 |
| EP0473818B1 EP0473818B1 (en) | 1993-06-02 |
Family
ID=8204429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP90116933A Expired - Lifetime EP0473818B1 (en) | 1990-09-04 | 1990-09-04 | Device for controlling the supply of liquid fuels to a flow measuring instrument |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0473818B1 (en) |
| AT (1) | ATE90070T1 (en) |
| DE (1) | DE59001631D1 (en) |
| ES (1) | ES2042163T3 (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0532202A3 (en) * | 1991-09-13 | 1993-07-14 | Gilbarco Limited | A fuel dispenser |
| US5363988A (en) * | 1991-09-13 | 1994-11-15 | Gilbarco Limited | Fuel dispenser controlled in dependence on an electrical signal from a gas detector of the dispenser |
| WO1995011193A1 (en) * | 1993-10-19 | 1995-04-27 | Dong Nam Co., Ltd. | Oil supply apparatus for oil tank trucks |
| CN1037085C (en) * | 1993-05-17 | 1998-01-21 | D·S·l·约瑟·勃勒脱威许有限公司 | Tap head for beverage containers or vessels |
| WO1998050303A1 (en) * | 1997-05-05 | 1998-11-12 | Delaware Capital Formation, Inc. | Air separating fuel dispensing system |
| WO2000076910A1 (en) * | 1999-06-11 | 2000-12-21 | Delaware Capital Formation, Inc. | System and method for deaerating and dispensing liquid fuel |
| WO2005036291A1 (en) * | 2003-10-11 | 2005-04-21 | Veeder-Root Company | Method and system for determining and monitoring the dispensing efficiency of a fuel dispensing point in a service station environment |
| EP1742026A1 (en) * | 2005-07-08 | 2007-01-10 | Dresser Wayne Aktiebolag | Gas meter |
| US7814942B2 (en) | 2005-06-29 | 2010-10-19 | Dresser, Inc. | Vapor recovery system for low temperatures |
| WO2011122965A3 (en) * | 2010-03-31 | 2011-11-24 | Swashpump Technologies Limited | A fuel pump module for fuel dispensers |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT227112B (en) * | 1961-03-18 | 1963-04-25 | Scheidt & Bachmann Ag | Gas meter for tank systems for dispensing liquid fuels |
| EP0357513A1 (en) * | 1988-09-02 | 1990-03-07 | Schlumberger Industries | Fuel dispenser with a device for controlling the gas content |
-
1990
- 1990-09-04 ES ES199090116933T patent/ES2042163T3/en not_active Expired - Lifetime
- 1990-09-04 DE DE9090116933T patent/DE59001631D1/en not_active Expired - Fee Related
- 1990-09-04 EP EP90116933A patent/EP0473818B1/en not_active Expired - Lifetime
- 1990-09-04 AT AT90116933T patent/ATE90070T1/en not_active IP Right Cessation
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT227112B (en) * | 1961-03-18 | 1963-04-25 | Scheidt & Bachmann Ag | Gas meter for tank systems for dispensing liquid fuels |
| EP0357513A1 (en) * | 1988-09-02 | 1990-03-07 | Schlumberger Industries | Fuel dispenser with a device for controlling the gas content |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0532202A3 (en) * | 1991-09-13 | 1993-07-14 | Gilbarco Limited | A fuel dispenser |
| US5363988A (en) * | 1991-09-13 | 1994-11-15 | Gilbarco Limited | Fuel dispenser controlled in dependence on an electrical signal from a gas detector of the dispenser |
| CN1037085C (en) * | 1993-05-17 | 1998-01-21 | D·S·l·约瑟·勃勒脱威许有限公司 | Tap head for beverage containers or vessels |
| WO1995011193A1 (en) * | 1993-10-19 | 1995-04-27 | Dong Nam Co., Ltd. | Oil supply apparatus for oil tank trucks |
| WO1998050303A1 (en) * | 1997-05-05 | 1998-11-12 | Delaware Capital Formation, Inc. | Air separating fuel dispensing system |
| US5884809A (en) * | 1997-05-05 | 1999-03-23 | Delaware Capital Formation, Inc. | Air separating fuel dispensing system |
| WO2000076910A1 (en) * | 1999-06-11 | 2000-12-21 | Delaware Capital Formation, Inc. | System and method for deaerating and dispensing liquid fuel |
| US6179163B1 (en) * | 1999-06-11 | 2001-01-30 | Delaware Capital Formation, Inc. | System and method for evaluating the presence of air in a liquid-state fuel stream |
| WO2005036291A1 (en) * | 2003-10-11 | 2005-04-21 | Veeder-Root Company | Method and system for determining and monitoring the dispensing efficiency of a fuel dispensing point in a service station environment |
| US6975964B2 (en) | 2003-10-11 | 2005-12-13 | Veeder-Root Company | Method and system for determining and monitoring the dispensing efficiency of a fuel dispensing point in a service station environment |
| US7814942B2 (en) | 2005-06-29 | 2010-10-19 | Dresser, Inc. | Vapor recovery system for low temperatures |
| EP1742026A1 (en) * | 2005-07-08 | 2007-01-10 | Dresser Wayne Aktiebolag | Gas meter |
| US7963423B2 (en) | 2005-07-08 | 2011-06-21 | Dresser, Inc. | Fuel dispensing unit with gas sensor |
| WO2011122965A3 (en) * | 2010-03-31 | 2011-11-24 | Swashpump Technologies Limited | A fuel pump module for fuel dispensers |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2042163T3 (en) | 1993-12-01 |
| DE59001631D1 (en) | 1993-07-08 |
| EP0473818B1 (en) | 1993-06-02 |
| ATE90070T1 (en) | 1993-06-15 |
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