WO2024028010A1 - Shut-off valve for a fuel gas tank, fuel gas tank comprising a shut-off valve, and fuel gas tank system - Google Patents

Shut-off valve for a fuel gas tank, fuel gas tank comprising a shut-off valve, and fuel gas tank system Download PDF

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Publication number
WO2024028010A1
WO2024028010A1 PCT/EP2023/068223 EP2023068223W WO2024028010A1 WO 2024028010 A1 WO2024028010 A1 WO 2024028010A1 EP 2023068223 W EP2023068223 W EP 2023068223W WO 2024028010 A1 WO2024028010 A1 WO 2024028010A1
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WO
WIPO (PCT)
Prior art keywords
valve
fuel gas
shut
gas tank
control valve
Prior art date
Application number
PCT/EP2023/068223
Other languages
German (de)
French (fr)
Inventor
Udo Schaich
Andreas Rau
Joachim Soubari
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2024028010A1 publication Critical patent/WO2024028010A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/04—Arrangement or mounting of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/058—Size portable (<30 l)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F17C2205/0326—Valves electrically actuated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F17C2205/0332—Safety valves or pressure relief valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F17C2205/0335—Check-valves or non-return valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0382—Constructional details of valves, regulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/01—Pure fluids
    • F17C2221/012—Hydrogen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0107—Single phase
    • F17C2223/0123—Single phase gaseous, e.g. CNG, GNC
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/036—Very high pressure (>80 bar)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0165—Applications for fluid transport or storage on the road
    • F17C2270/0184—Fuel cells

Definitions

  • the invention relates to a shut-off valve for a fuel gas tank. Furthermore, the invention relates to a fuel gas tank with a shut-off valve according to the invention.
  • the fuel gas can in particular be hydrogen or natural gas.
  • the preferred area of application of the invention is fuel cell and/or gas vehicles.
  • Mobile fuel gas tank systems with at least one fuel gas tank for storing fuel gas, for example hydrogen or natural gas, are known.
  • the fuel gas tanks are usually designed as high-pressure tanks.
  • a high pressure tank always requires a shut-off valve to seal off the tank when the vehicle is not in use.
  • the shut-off valve is therefore designed as a normally closed valve.
  • DE 10 2018 221 602 A1 shows an example of a tank device for storing a gaseous medium, in particular hydrogen, with an electromagnetically controllable valve device and a tank.
  • the valve device comprises a magnetic coil, the magnetic force of which acts on a control valve element that can be moved back and forth along a longitudinal axis.
  • a spring presses the control valve element against a valve seat formed on the housing side.
  • shut-off valves that open indirectly and/or in multiple stages are known, which include a main valve and a control valve.
  • a main valve When opening, a smaller opening cross-section can be used to reduce the opening force via the control valve. cut can be released. The changing pressure conditions at the main valve can then cause it to open completely.
  • a mechanical driver can be arranged between the control valve and the main valve.
  • the force that can be applied via the mechanical driver is limited, so that the force utilization of the respective actuator is not optimal.
  • the present invention is concerned with the task of specifying a shut-off valve for a fuel gas tank, which has a main valve and a control valve and is optimized with regard to the power transmission between the control valve and the main valve.
  • shut-off valve with the features of claim 1 and the fuel gas tank with the features of claim 8 are proposed.
  • Advantageous developments of the invention can be found in the respective subclaims.
  • a fuel gas tank system with a fuel gas tank according to the invention is proposed.
  • the shut-off valve proposed for a fuel gas tank includes a valve housing that forms a valve space and a valve seat.
  • a valve closing element that interacts with the valve seat is accommodated in the valve chamber so that it can move back and forth.
  • the valve closing element forms a control valve seat for a reciprocating control valve piston arranged coaxially to the valve closing element, which is acted upon by the spring force of a compression spring in the direction of the control valve seat and is coupled to the valve closing element in the opening direction via a tension spring.
  • the shut-off valve is opened in several stages. In a first stage, the control valve seat is opened via the stroke of the control valve piston. In a second stage, the valve seat of the main valve is then opened.
  • the necessary opening force on the main valve is transferred from the control valve piston to the valve closing element via the tension spring, with the opening spring force of the tension spring also increasing as the stroke of the control valve piston increases.
  • the actuator system provided for opening the shut-off valve can be made smaller. Over and beyond The spring force of the tension spring does not have to be compensated for by the spring force of the compression spring acting in the closing direction, as would be the case, for example, with another compression spring for coupling the control valve piston and the valve closing element. Coupling via another compression spring would therefore have the opposite effect, meaning that the actuator would have to be designed larger.
  • a magnetic coil is preferably provided for acting on a magnet armature, which also forms the control valve piston or is connected to the control valve piston.
  • the magnet armature thus causes the movement of the control valve piston. Since the air gap on the magnet armature becomes smaller as the stroke of the magnet armature or the control valve piston increases, the opening force acting on the main valve increases. In this way, the force characteristic of the main valve is adapted to the force characteristic of the magnet armature. Since the opening force acting on the main valve is greater than with a conventional driver due to the smaller air gap at the time of opening, the main valve can either open against larger pressure differences with the same magnet armature or be dimensioned smaller for a given opening pressure difference.
  • the working air gap becomes smaller and the magnetic force and the spring force of the tension spring increase.
  • the working air gap is minimal and the opening forces caused by the magnetic coil and the tension spring are maximum.
  • the force curve of the opening force caused by the tension spring can thus be well adapted to the magnetic force characteristic, so that the magnetic coil can have a reduced coil volume.
  • the control valve seat has a smaller seat diameter than the valve seat of the main valve. The control valve seat can then be opened with comparatively little force. The flow can then be maximized by opening the valve seat of the main valve.
  • valve closing element and/or the control valve piston is/are designed to be hollow at least in sections for connecting the valve chamber to a storage volume of the fuel gas tank.
  • an axial bore can be formed in the valve closing element and/or in the control valve piston.
  • the compression spring and/or the tension spring is/are preferably accommodated at least in sections in the control valve piston. In this way, guidance of the compression spring and/or the tension spring can be effected via the control valve piston.
  • An axial bore can be formed in the control valve piston to accommodate the compression spring and/or the tension spring.
  • the axial bore can also serve to connect the valve chamber to the storage volume of the fuel gas tank. In this case, the axial bore is permanently supplied with fuel gas from the storage volume of the fuel gas tank.
  • the axial bore can be designed as a stepped bore. The tension spring can be held at the end in the axial bore via an anchoring element.
  • control valve piston and/or the magnet armature is or are guided axially over the valve housing. In this way, a compact arrangement can be created.
  • the valve closing element is preferably guided axially over the control valve piston.
  • the fuel gas tank also proposed has a shut-off valve according to the invention. Due to the compact design, which is due, among other things, to the smaller magnet coil, the shut-off valve can be integrated into the fuel gas tank, for example in a kind of bottleneck of the fuel gas tank. holder.
  • the shut-off valve according to the invention is advantageously integrated into a tank unit connected to the fuel gas tank.
  • the shut-off valve can be combined with other components, such as a safety valve and/or a sensor, via the tank unit.
  • the tank unit then facilitates the integration of all components into the fuel gas tank.
  • At least one further valve in particular a check valve for refueling a storage volume of the fuel gas tank, is integrated into the tank unit.
  • the storage volume can then be filled with fuel gas when refueling via the additional valve.
  • a fuel gas tank system which comprises at least one fuel gas tank according to the invention.
  • the proposed fuel gas tank system is preferably used in a fuel cell vehicle or in a gas vehicle.
  • Fig. 1 shows a schematic longitudinal section through a shut-off valve according to the invention
  • Fig. 2 shows a schematic longitudinal section through a fuel gas tank according to the invention.
  • the shut-off valve 1 according to the invention shown in Figure 1 is used to remove fuel gas from a storage volume 13 of a fuel gas tank 2, as shown by way of example in Figure 2.
  • the shut-off valve 1 shown comprises a valve housing 3 in which a valve chamber 4 is formed.
  • a valve closing element 6, which interacts with a valve seat 5, is accommodated in the valve chamber 4 so that it can move back and forth.
  • the valve closing element 6 forms a control valve seat 7 for a reciprocating control valve piston 8, which is acted upon by the spring force of a compression spring 9 in the direction of the control valve seat 7.
  • the compression spring 9 is received in a first section of an axial bore 16 of the control valve piston 8 designed as a stepped bore.
  • a tension spring 10 is arranged, via which the control valve piston 8 is coupled to the valve closing element 6.
  • the valve chamber 4 is also connected to the storage volume 13 of the fuel gas tank 2 via the axial bore 16.
  • a magnetic coil 11 which acts on a magnetic armature 12, which in the present case also forms the control valve piston 8.
  • Magnet armature 12 and control valve piston 8 are therefore one component.
  • the magnetic force of the magnetic coil 11 thus acts directly on the control valve piston 8. If the magnetic coil 11 is energized, a magnetic field is formed, the magnetic force of which moves the magnetic armature 12 or the control valve block 8 in the direction of the magnetic coil 11 in order to close a working air gap 17.
  • the magnet armature 12 or the control valve piston 8 lifts off the control valve seat 7, so that a first small opening cross section is opened. As the stroke of the magnet armature 12 or the control valve piston 8 increases, the working air gap decreases, so that the magnetic force increases.
  • the spring force of the tension spring 10 increases, so that it ultimately pulls the valve closing element 6 out of the valve seat 5.
  • the tension spring 11 is held at both ends via an anchoring element 18 in the control valve piston 8 and in the valve closing element 6.
  • the tension spring is guided via the magnet armature 12 or the control valve piston 8.
  • the shut-off valve 1 can be integrated into a tank unit 14, which can also accommodate further components.
  • the tank unit 14 includes a further valve 15, which is designed as a check valve and connects the storage volume 13 with a refueling path 20. Fuel gas can thus be removed from the storage volume 13 and supplied via the components of the tank unit 14.
  • additional components can be integrated into the tank unit 14.
  • the fuel gas tank 2 is designed like a balloon or bottle in FIG. The tank unit 14 is inserted into the fuel gas tank 2 at the end.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

The invention relates to a shut-off valve (1) for a fuel gas tank (2), said shut-off valve comprising a valve housing (3) which forms a valve chamber (4) and a valve seat (5), wherein a valve closing element (6) that co-operates with the valve seat (5) is accommodated in the valve chamber (4) so as to be movable back and forth, and wherein the valve closing element (6) forms a control valve seat (7) for a reciprocally movable control valve piston (8) which is positioned coaxially with respect to the valve closing element (6), is subjected to the spring force of a compression spring (9) in the direction of the control valve seat (7), and is coupled to the valve closing element (6) in the opening direction via a tension spring (10). The invention also relates to: a fuel gas tank (2) comprising a shut-off valve (1) according to the invention; and a fuel gas tank system.

Description

Beschreibung mit Absperrventil sowie Brenn-
Figure imgf000003_0001
Description with shut-off valve and burner
Figure imgf000003_0001
Die Erfindung betrifft ein Absperrventil für einen Brenngastanks Ferner betrifft die Erfindung einen Brenngastank mit einem erfindungsgemäßen Absperrventil. Bei dem Brenngas kann es sich insbesondere um Wasserstoff oder Erdgas handeln. Bevorzugter Anwendungsbereich der Erfindung sind Brennstoffzellen- und/oder Gasfahrzeuge. The invention relates to a shut-off valve for a fuel gas tank. Furthermore, the invention relates to a fuel gas tank with a shut-off valve according to the invention. The fuel gas can in particular be hydrogen or natural gas. The preferred area of application of the invention is fuel cell and/or gas vehicles.
Stand der Technik State of the art
Bekannt sind mobile Brenngastanksysteme mit mindestens einem Brenngastank zur Speicherung von Brenngas, beispielsweise Wasserstoff oder Erdgas. Die Brenngastanks sind dabei in der Regel als Hochdrucktanks ausgelegt. Ein Hochdrucktank benötigt immer ein Absperrventil, um den Tank dicht abzusperren, wenn das Fahrzeug nicht in Betrieb ist. Das Absperrventil ist daher als stromlos geschlossenes Ventil ausgeführt. Mobile fuel gas tank systems with at least one fuel gas tank for storing fuel gas, for example hydrogen or natural gas, are known. The fuel gas tanks are usually designed as high-pressure tanks. A high pressure tank always requires a shut-off valve to seal off the tank when the vehicle is not in use. The shut-off valve is therefore designed as a normally closed valve.
Aus der DE 10 2018 221 602 A1 geht beispielhaft eine Tankvorrichtung zur Speicherung eines gasförmigen Mediums, insbesondere Wasserstoff, mit einer elektromagnetisch ansteuerbaren Ventilvorrichtung und einem Tank hervor. Zur elektromagnetischen Ansteuerung umfasst die Ventilvorrichtung eine Magnetspule, deren Magnetkraft auf ein entlang einer Längsachse hin und her bewegliches Ansteuerventilelement wirkt. Bei unbestromter Magnetspule drückt eine Feder das Ansteuerventilelement gegen einen gehäuseseitig ausgebildeten Ventilsitz. DE 10 2018 221 602 A1 shows an example of a tank device for storing a gaseous medium, in particular hydrogen, with an electromagnetically controllable valve device and a tank. For electromagnetic control, the valve device comprises a magnetic coil, the magnetic force of which acts on a control valve element that can be moved back and forth along a longitudinal axis. When the solenoid coil is de-energized, a spring presses the control valve element against a valve seat formed on the housing side.
Darüber hinaus sind indirekt und/oder mehrstufig öffnende Absperrventile bekannt, die ein Hauptventil und ein Steuerventil umfassen. Beim Öffnen kann dann zur Reduzierung der Öffnungskraft über das Steuerventil zunächst ein kleinerer Öffnungsquer- schnitt freigegeben werden. Durch die sich ändernden Druckverhältnisse am Hauptventil kann anschließend das vollständige Öffnen bewirkt werden. Unterstützend kann zwischen dem Steuerventil und dem Hauptventil ein mechanischer Mitnehmer angeordnet sein. Die über den mechanischen Mitnehmer aufbringbare Kraft ist allerdings begrenzt, so dass die Kraftausnutzung der jeweiligen Aktorik nicht optimal ist. In addition, shut-off valves that open indirectly and/or in multiple stages are known, which include a main valve and a control valve. When opening, a smaller opening cross-section can be used to reduce the opening force via the control valve. cut can be released. The changing pressure conditions at the main valve can then cause it to open completely. To provide support, a mechanical driver can be arranged between the control valve and the main valve. However, the force that can be applied via the mechanical driver is limited, so that the force utilization of the respective actuator is not optimal.
Die vorliegende Erfindung ist mit der Aufgabe befasst, ein Absperrventil für einen Brenngastank anzugeben, das ein Hauptventil und ein Steuerventil aufweist und hinsichtlich der Kraftübertragung zwischen Steuerventil und Hauptventil optimiert ist. The present invention is concerned with the task of specifying a shut-off valve for a fuel gas tank, which has a main valve and a control valve and is optimized with regard to the power transmission between the control valve and the main valve.
Zur Lösung der Aufgabe werden das Absperrventil mit den Merkmalen des Anspruchs 1 sowie der Brenngastank mit den Merkmalen des Anspruchs 8 vorgeschlagen. Vorteilhafte Weiterbildungen der Erfindung sind den jeweiligen Unteransprüchen zu entnehmen. Des Weiteren wird ein Brenngastanksystem mit einem erfindungsgemäßen Brenngastank vorgeschlagen. To solve the problem, the shut-off valve with the features of claim 1 and the fuel gas tank with the features of claim 8 are proposed. Advantageous developments of the invention can be found in the respective subclaims. Furthermore, a fuel gas tank system with a fuel gas tank according to the invention is proposed.
Offenbarung der Erfindung Disclosure of the invention
Das für einen Brenngastank vorgeschlagene Absperrventil umfasst ein Ventilgehäuse, das einen Ventilraum und einen Ventilsitz ausbildet. Im Ventilraum ist dabei ein mit dem Ventilsitz zusammenwirkendes Ventilschließelement hin und her beweglich aufgenommen. Das Ventilschließelement bildet einen Steuerventilsitz für einen koaxial zum Ventilschließelement angeordneten hubbeweglichen Steuerventilkolben aus, der über die Federkraft einer Druckfeder in Richtung des Steuerventilsitzes beaufschlagt und in Öffnungsrichtung über eine Zugfeder mit dem Ventilschließelement gekoppelt ist. The shut-off valve proposed for a fuel gas tank includes a valve housing that forms a valve space and a valve seat. A valve closing element that interacts with the valve seat is accommodated in the valve chamber so that it can move back and forth. The valve closing element forms a control valve seat for a reciprocating control valve piston arranged coaxially to the valve closing element, which is acted upon by the spring force of a compression spring in the direction of the control valve seat and is coupled to the valve closing element in the opening direction via a tension spring.
Das Öffnen des Absperrventils erfolgt mehrstufig. Über den Hub des Steuerventilkolbens wird in einer ersten Stufe der Steuerventilsitz geöffnet. In einer zweiten Stufe wird dann der Ventilsitz des Hauptventils geöffnet. Die notwendige Öffnungskraft am Hauptventil wird dabei über die Zugfeder vom Steuerventilkolben auf das Ventilschließelement übertragen, wobei die öffnend wirkende Federkraft der Zugfeder mit zunehmendem Hub des Steuerventilkolbens ebenfalls ansteigt. In der Folge kann die zum Öffnen des Absperrventils vorgesehene Aktorik kleiner dimensioniert werden. Darüber hinaus muss die Federkraft der Zugfeder nicht durch die Federkraft der in Schließrichtung wirkenden Druckfeder kompensiert werden, wie dies beispielsweise bei einer weiteren Druckfeder zur Kopplung von Steuerventilkolben und Ventilschließelement der Fall wäre. Die Kopplung über eine weitere Druckfeder hätte demnach den gegenteiligen Effekt zur Folge, das heißt, dass der Aktor größer ausgelegt werden müsste. The shut-off valve is opened in several stages. In a first stage, the control valve seat is opened via the stroke of the control valve piston. In a second stage, the valve seat of the main valve is then opened. The necessary opening force on the main valve is transferred from the control valve piston to the valve closing element via the tension spring, with the opening spring force of the tension spring also increasing as the stroke of the control valve piston increases. As a result, the actuator system provided for opening the shut-off valve can be made smaller. Over and beyond The spring force of the tension spring does not have to be compensated for by the spring force of the compression spring acting in the closing direction, as would be the case, for example, with another compression spring for coupling the control valve piston and the valve closing element. Coupling via another compression spring would therefore have the opposite effect, meaning that the actuator would have to be designed larger.
Bevorzugt ist eine Magnetspule zum Einwirken auf einen Magnetanker vorgesehen, der zugleich den Steuerventilkolben ausbildet oder mit dem Steuerventilkolben verbunden ist. Der Magnetanker bewirkt somit die Bewegung des Steuerventilkolbens. Da mit zunehmendem Hub des Magnetankers bzw. des Steuerventilkolbens der Luftspalt am Magnetanker kleiner wird, steigt die auf das Hauptventil wirkende Öffnungskraft. Die Kraftkennlinie des Hauptventils wird auf diese Weise an die Kraftkennlinie des Magnetankers angepasst. Da die auf das Hauptventil wirkende Öffnungskraft aufgrund des geringeren Luftspalts zum Öffnungszeitpunkt größer als bei einem konventionellen Mitnehmer ist, kann das Hauptventil bei gleichem Magnetanker entweder gegen größere Druckdifferenzen öffnen oder bei gegebener Öffnungsdruckdifferenz kleiner dimensioniert werden. A magnetic coil is preferably provided for acting on a magnet armature, which also forms the control valve piston or is connected to the control valve piston. The magnet armature thus causes the movement of the control valve piston. Since the air gap on the magnet armature becomes smaller as the stroke of the magnet armature or the control valve piston increases, the opening force acting on the main valve increases. In this way, the force characteristic of the main valve is adapted to the force characteristic of the magnet armature. Since the opening force acting on the main valve is greater than with a conventional driver due to the smaller air gap at the time of opening, the main valve can either open against larger pressure differences with the same magnet armature or be dimensioned smaller for a given opening pressure difference.
Bei einer Bestromung der Magnetspule baut sich ein Magnetfeld auf, dessen Magnetkraft auf den Magnetanker einwirkt. Der Magnetanker und der Steuerventilkolben, sofern dieser als separates Bauteil ausgeführt ist, werden über die Magnetkraft in Richtung der Magnetspule bewegt. Der Steuerventilkolben wird dabei aus dem Steuerventilsitz gehoben. Aufgrund der mittels der Zugfeder bewirkten Kopplung des Steuerventilkolbens mit dem Ventilschließelement öffnet schließlich auch der Ventilsitz des Hauptventils. Zu Beginn des Öffnungsvorgangs ist der Arbeitsluftspalt zwischen dem Magnetanker und Polkörper des Magnetkreises groß, so dass die auf den Magnetanker einwirkende Magnetkraft eher gering ist. Gleiches gilt für die Federkraft der Zugfeder. Mit zunehmendem Hub des Magnetankers bzw. des Steuerventilkolbens wird jedoch der Arbeitsluftspalt kleiner und die Magnetkraft sowie die Federkraft der Zugfeder steigen an. Mit Erreichen eines Hubanschlags ist der Arbeitsluftspalt minimal und die mittels der Magnetspule und der Zugfeder bewirkten Öffnungskräfte maximal. Der Kraftverlauf der über die Zugfeder bewirkten Öffnungskraft kann somit gut an die Magnetkraftkennlinie angepasst werden, so dass die Magnetspule ein verringertes Spulenvolumen aufweisen kann. Des Weiteren wird vorgeschlagen, dass der Steuerventilsitz einen kleineren Sitzdurchmesser als der Ventilsitz des Hauptventils aufweist. Das Öffnen des Steuerventilsitzes kann dann mit vergleichsweise geringer Kraft bewirkt werden. Mit Öffnen des Ventilsitzes des Hauptventils kann dann der Durchfluss maximiert werden. When the magnetic coil is energized, a magnetic field is created, the magnetic force of which acts on the magnet armature. The magnet armature and the control valve piston, if this is designed as a separate component, are moved in the direction of the magnet coil via the magnetic force. The control valve piston is lifted out of the control valve seat. Due to the coupling of the control valve piston with the valve closing element caused by the tension spring, the valve seat of the main valve ultimately also opens. At the beginning of the opening process, the working air gap between the magnet armature and the pole body of the magnetic circuit is large, so that the magnetic force acting on the magnet armature is rather low. The same applies to the spring force of the tension spring. However, as the stroke of the magnet armature or the control valve piston increases, the working air gap becomes smaller and the magnetic force and the spring force of the tension spring increase. When a stroke stop is reached, the working air gap is minimal and the opening forces caused by the magnetic coil and the tension spring are maximum. The force curve of the opening force caused by the tension spring can thus be well adapted to the magnetic force characteristic, so that the magnetic coil can have a reduced coil volume. Furthermore, it is proposed that the control valve seat has a smaller seat diameter than the valve seat of the main valve. The control valve seat can then be opened with comparatively little force. The flow can then be maximized by opening the valve seat of the main valve.
Bei geöffnetem Absperrventil strömt Brenngas aus dem Brenngastank. Das heißt, dass eine Verbindung des Ventilraums des Absperrventils mit einem Speichervolumen des Brenngastanks herstellbar ist. Gemäß einer bevorzugten Ausführungsform der Erfindung ist bzw. sind das Ventilschließelement und/oder der Steuerventilkolben zur Anbindung des Ventilraums an ein Speichervolumen des Brenngastanks zumindest abschnittsweise hohl ausgeführt. Hierzu kann bzw. können im Ventilschließelement und/oder im Steuerventilkolben eine Axialbohrung ausgebildet sein. When the shut-off valve is open, fuel gas flows out of the fuel gas tank. This means that a connection between the valve chamber of the shut-off valve and a storage volume of the fuel gas tank can be established. According to a preferred embodiment of the invention, the valve closing element and/or the control valve piston is/are designed to be hollow at least in sections for connecting the valve chamber to a storage volume of the fuel gas tank. For this purpose, an axial bore can be formed in the valve closing element and/or in the control valve piston.
Ferner bevorzugt ist bzw. sind die Druckfeder und/oder die Zugfeder zumindest abschnittsweise im Steuerventilkolben aufgenommen. Auf diese Weise kann über den Steuerventilkolben eine Führung der Druckfeder und/oder der Zugfeder bewirkt werden. Zur Aufnahme der Druckfeder und/oder der Zugfeder kann im Steuerventilkolben eine Axialbohrung ausgebildet sein. Die Axialbohrung kann zugleich der Anbindung des Ventilraums an das Speichervolumen des Brenngastanks dienen. In diesem Fall ist die Axialbohrung dauerhaft mit Brenngas aus dem Speichervolumen des Brenngastanks beaufschlagt. Zur axialen Abstützung der Druckfeder kann die Axialbohrung als Stufenbohrung ausgeführt sein. Die Zugfeder kann endseitig über ein Verankerungselement in der Axialbohrung gehalten sein. Furthermore, the compression spring and/or the tension spring is/are preferably accommodated at least in sections in the control valve piston. In this way, guidance of the compression spring and/or the tension spring can be effected via the control valve piston. An axial bore can be formed in the control valve piston to accommodate the compression spring and/or the tension spring. The axial bore can also serve to connect the valve chamber to the storage volume of the fuel gas tank. In this case, the axial bore is permanently supplied with fuel gas from the storage volume of the fuel gas tank. To axially support the compression spring, the axial bore can be designed as a stepped bore. The tension spring can be held at the end in the axial bore via an anchoring element.
In Weiterbildung der Erfindung wird vorgeschlagen, dass der Steuerventilkolben und/oder der Magnetanker über das Ventilgehäuse axial geführt ist bzw. sind. Auf diese Weise kann eine kompakt bauende Anordnung geschaffen werden. Das Ventilschließelement ist vorzugsweise über den Steuerventilkolben axial geführt. In a further development of the invention, it is proposed that the control valve piston and/or the magnet armature is or are guided axially over the valve housing. In this way, a compact arrangement can be created. The valve closing element is preferably guided axially over the control valve piston.
Der darüber hinaus vorgeschlagene Brenngastank weist ein erfindungsgemäßes Absperrventil auf. Aufgrund der kompakten Bauform, die unter anderem auf die kleiner dimensionierte Magnetspule zurückzuführen ist, kann das Absperrventil in den Brenngastank integriert werden, beispielsweise in einer Art Flaschenhals des Brenngasbe- hälters. Vorteilhafterweise ist das erfindungsgemäße Absperrventil in eine mit dem Brenngastank verbundene Tankeinheit integriert. Über die Tankeinheit kann das Absperrventil mit weiteren Komponenten, wie beispielsweise einem Sicherheitsventil und/oder einem Sensor, kombiniert werden. Die Tankeinheit erleichtert dann die Integration aller Komponenten in den Brenngastank. The fuel gas tank also proposed has a shut-off valve according to the invention. Due to the compact design, which is due, among other things, to the smaller magnet coil, the shut-off valve can be integrated into the fuel gas tank, for example in a kind of bottleneck of the fuel gas tank. holder. The shut-off valve according to the invention is advantageously integrated into a tank unit connected to the fuel gas tank. The shut-off valve can be combined with other components, such as a safety valve and/or a sensor, via the tank unit. The tank unit then facilitates the integration of all components into the fuel gas tank.
Gemäß einer bevorzugten Ausführungsform der Erfindung ist in die Tankeinheit mindestens ein weiteres Ventil, insbesondere ein Rückschlagventil zum Betanken eines Speichervolumens des Brenngastanks, integriert. Über das weitere Ventil kann dann das Speichervolumen beim Betanken mit Brenngas gefüllt werden. According to a preferred embodiment of the invention, at least one further valve, in particular a check valve for refueling a storage volume of the fuel gas tank, is integrated into the tank unit. The storage volume can then be filled with fuel gas when refueling via the additional valve.
Ferner wird ein Brenngastanksystem vorgeschlagen, das mindestens einen erfindungsgemäßen Brenngastank umfasst. Das vorgeschlagene Brenngastanksystem gelangt vorzugsweise in einem Brennstoffzellenfahrzeug oder in einem Gasfahrzeug zum Einsatz. Furthermore, a fuel gas tank system is proposed which comprises at least one fuel gas tank according to the invention. The proposed fuel gas tank system is preferably used in a fuel cell vehicle or in a gas vehicle.
Eine bevorzugte Ausführungsform der Erfindung wird nachfolgend anhand der beigefügten Zeichnungen näher erläutert. Diese zeigen: A preferred embodiment of the invention is explained in more detail below with reference to the accompanying drawings. These show:
Fig. 1 einen schematischen Längsschnitt durch ein erfindungsgemäßes Absperrventil und Fig. 1 shows a schematic longitudinal section through a shut-off valve according to the invention and
Fig. 2 einen schematischen Längsschnitt durch einen erfindungsgemäßen Brenngastank. Fig. 2 shows a schematic longitudinal section through a fuel gas tank according to the invention.
Ausführliche Beschreibung der Zeichnungen Detailed description of the drawings
Das in der Figur 1 dargestellte erfindungsgemäße Absperrventil 1 dient der Entnahme von Brenngas aus einem Speichervolumen 13 eines Brenngastanks 2, wie beispielhaft in der Figur 2 dargestellt. The shut-off valve 1 according to the invention shown in Figure 1 is used to remove fuel gas from a storage volume 13 of a fuel gas tank 2, as shown by way of example in Figure 2.
Das dargestellte Absperrventil 1 umfasst ein Ventilgehäuse 3, in dem ein Ventilraum 4 ausgebildet ist. In dem Ventilraum 4 ist ein mit einem Ventilsitz 5 zusammenwirkendes Ventilschließelement 6 hin und her beweglich aufgenommen. Das Ventilschließelement 6 bildet einen Steuerventilsitz 7 für einen hubbeweglichen Steuerventilkolben 8 aus, der in Richtung des Steuerventilsitzes 7 von der Federkraft einer Druckfeder 9 beaufschlagt ist. Die Druckfeder 9 ist in einem ersten Abschnitt einer als Stufenbohrung ausgeführten Axialbohrung 16 des Steuerventilkolbens 8 aufgenommen. In einem weiteren Abschnitt ist eine Zugfeder 10 angeordnet, über die der Steuerventilkolben 8 mit dem Ventilschließelement 6 gekoppelt ist. Über die Axialbohrung 16 ist zugleich der Ventilraum 4 an das Speichervolumen 13 des Brenngastanks 2 angebunden. The shut-off valve 1 shown comprises a valve housing 3 in which a valve chamber 4 is formed. A valve closing element 6, which interacts with a valve seat 5, is accommodated in the valve chamber 4 so that it can move back and forth. The valve closing element 6 forms a control valve seat 7 for a reciprocating control valve piston 8, which is acted upon by the spring force of a compression spring 9 in the direction of the control valve seat 7. The compression spring 9 is received in a first section of an axial bore 16 of the control valve piston 8 designed as a stepped bore. In a further section, a tension spring 10 is arranged, via which the control valve piston 8 is coupled to the valve closing element 6. The valve chamber 4 is also connected to the storage volume 13 of the fuel gas tank 2 via the axial bore 16.
Zum Öffnen des Absperrventils 1 ist eine Magnetspule 11 vorgesehen, die auf einen Magnetanker 12 einwirkt, der vorliegend zugleich den Steuerventilkolben 8 ausbildet. Magnetanker 12 und Steuerventilkolben 8 sind demnach ein Bauteil. Die Magnetkraft der Magnetspule 11 wirkt somit unmittelbar auf den Steuerventilkolben 8. Wird die Magnetspule 11 bestromt, bildet sich ein Magnetfeld aus, dessen Magnetkraft den Magnetanker 12 bzw. den Steuerventilkloben 8 in Richtung der Magnetspule 11 bewegt, um einen Arbeitsluftspalt 17 zu schließen. Dabei hebt der Magnetanker 12 bzw. der Steuerventilkolben 8 vom Steuerventilsitz 7 ab, so dass ein erster kleiner Öff- nungsquerschnitt geöffnet wird. Mit zunehmendem Hub des Magnetankers 12 bzw. des Steuerventilkolbens 8 verringert sich der Arbeitsluftspalt, so dass die Magnetkraft steigt. Zugleich steigt die Federkraft der Zugfeder 10, so dass diese schließlich das Ventilschließelement 6 aus dem Ventilsitz 5 zieht. Die Zugfeder 11 ist zur Kraftübertragung an ihren beiden Enden jeweils über ein Verankerungselement 18 im Steuerventilkolben 8 und im Ventilschließelement 6 gehalten. Über den Magnetanker 12 bzw. den Steuerventilkolben 8 ist die Zugfeder geführt. Mit Öffnen des Ventilsitzes 5 öffnet ein größerer Öffnungsquerschnitt, so dass der Durchfluss durch das Absperrventil 1 maximal ist. Das dem Speichervolumen 13 des Brenngastanks 2 entnommene Brenngas wird bei geöffnetem Absperrventil 1 in einen Entnahmepfad 19 eingeleitet. To open the shut-off valve 1, a magnetic coil 11 is provided, which acts on a magnetic armature 12, which in the present case also forms the control valve piston 8. Magnet armature 12 and control valve piston 8 are therefore one component. The magnetic force of the magnetic coil 11 thus acts directly on the control valve piston 8. If the magnetic coil 11 is energized, a magnetic field is formed, the magnetic force of which moves the magnetic armature 12 or the control valve block 8 in the direction of the magnetic coil 11 in order to close a working air gap 17. The magnet armature 12 or the control valve piston 8 lifts off the control valve seat 7, so that a first small opening cross section is opened. As the stroke of the magnet armature 12 or the control valve piston 8 increases, the working air gap decreases, so that the magnetic force increases. At the same time, the spring force of the tension spring 10 increases, so that it ultimately pulls the valve closing element 6 out of the valve seat 5. To transmit force, the tension spring 11 is held at both ends via an anchoring element 18 in the control valve piston 8 and in the valve closing element 6. The tension spring is guided via the magnet armature 12 or the control valve piston 8. When the valve seat 5 is opened, a larger opening cross section opens, so that the flow through the shut-off valve 1 is maximum. The fuel gas removed from the storage volume 13 of the fuel gas tank 2 is introduced into an extraction path 19 when the shut-off valve 1 is open.
Wie beispielhaft in der Figur 2 dargestellt, kann das Absperrventil 1 in eine Tankeinheit 14 integriert sein, das darüber hinaus weitere Komponenten aufnehmen kann. Vorliegend umfasst die Tankeinheit 14 ein weiteres Ventil 15, das als Rückschlagventil ausgeführt ist und das Speichervolumen 13 mit einem Betankungspfad 20 verbindet. Über die Komponenten der Tankeinheit 14 kann somit Brenngas dem Speichervolumen 13 entnommen, als auch zugeführt werden. Optional können in die Tankeinheit 14 weitere Komponenten integriert werden. Der Brenngastank 2 ist in der Figur 2 ballon- bzw. flaschenartig ausgeführt. Die Tankeinheit 14 ist endseitig in den Brenngastank 2 eingesetzt. As shown by way of example in FIG. 2, the shut-off valve 1 can be integrated into a tank unit 14, which can also accommodate further components. In the present case, the tank unit 14 includes a further valve 15, which is designed as a check valve and connects the storage volume 13 with a refueling path 20. Fuel gas can thus be removed from the storage volume 13 and supplied via the components of the tank unit 14. Optionally, additional components can be integrated into the tank unit 14. The fuel gas tank 2 is designed like a balloon or bottle in FIG. The tank unit 14 is inserted into the fuel gas tank 2 at the end.

Claims

Ansprüche Expectations
1 . Absperrventil (1) für einen Brenngastank (2), umfassend ein Ventilgehäuse (3), das einen Ventilraum (4) und einen Ventilsitz (5) ausbildet, wobei im Ventilraum (4) ein mit dem Ventilsitz (5) zusammenwirkendes Ventilschließelement (6) hin und her beweglich aufgenommen ist und wobei das Ventilschließelement (6) einen Steuerventilsitz (7) für einen koaxial zum Ventilschließelement (6) angeordneten hubbeweglichen Steuerventilkolben (8) ausbildet, der über die Federkraft einer Druckfeder (9) in Richtung des Steuerventilsitzes (7) beaufschlagt und in Öffnungsrichtung über eine Zugfeder (10) mit dem Ventilschließelement (6) gekoppelt ist. 1 . Shut-off valve (1) for a fuel gas tank (2), comprising a valve housing (3) which forms a valve chamber (4) and a valve seat (5), wherein in the valve chamber (4) there is a valve closing element (6) which interacts with the valve seat (5). is accommodated so that it can move back and forth and the valve closing element (6) forms a control valve seat (7) for a reciprocating control valve piston (8) which is arranged coaxially to the valve closing element (6) and which moves in the direction of the control valve seat (7) via the spring force of a compression spring (9). acted upon and coupled in the opening direction via a tension spring (10) to the valve closing element (6).
2. Absperrventil (1) nach Anspruch 1 , dadurch gekennzeichnet, dass eine Magnetspule (11) zum Einwirken auf einen Magnetanker (12) vorgesehen ist, der zugleich den Steuerventilkolben (8) ausbildet oder mit dem Steuerventilkolben (8) verbunden ist. 2. Shut-off valve (1) according to claim 1, characterized in that a magnetic coil (11) is provided for acting on a magnetic armature (12), which at the same time forms the control valve piston (8) or is connected to the control valve piston (8).
3. Absperrventil (1) nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Steuerventilsitz (7) einen kleineren Sitzdurchmesser als der Ventilsitz (5) aufweist. 3. Shut-off valve (1) according to claim 1 or 2, characterized in that the control valve seat (7) has a smaller seat diameter than the valve seat (5).
4. Absperrventil (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Ventilschließelement (6) und/oder der Steuerventilkolben (8) zur Anbindung des Ventilraums (4) an ein Speichervolumen (13) des Brenngastanks (2) zumindest abschnittsweise hohl ausgeführt ist bzw. sind. 4. Shut-off valve (1) according to one of the preceding claims, characterized in that the valve closing element (6) and / or the control valve piston (8) for connecting the valve chamber (4) to a storage volume (13) of the fuel gas tank (2) is at least partially hollow is or are carried out.
5. Absperrventil (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Druckfeder (9) und/oder die Zugfeder (10) zumindest abschnittsweise im Steuerventilkolben (8) aufgenommen ist bzw. sind. 5. Shut-off valve (1) according to one of the preceding claims, characterized in that the compression spring (9) and / or the tension spring (10) is or are accommodated at least in sections in the control valve piston (8).
6. Absperrventil (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Steuerventilkolben (8) und/oder der Magnetanker (12) über das Ventilgehäuse (3) axial geführt ist bzw. sind. 6. Shut-off valve (1) according to one of the preceding claims, characterized in that the control valve piston (8) and / or the magnet armature (12) is or are guided axially over the valve housing (3).
7. Absperrventil (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Ventilschließelement (6) über den Steuerventilkolben (8) axial geführt ist. 7. Shut-off valve (1) according to one of the preceding claims, characterized in that the valve closing element (6) is guided axially over the control valve piston (8).
8. Brenngastank (2) mit einem Absperrventil (1) nach einem der vorhergehenden Ansprüche, wobei vorzugsweise das Absperrventil (1) in eine mit dem Brenngastank (2) verbundene Tankeinheit (14) integriert ist. 8. Fuel gas tank (2) with a shut-off valve (1) according to one of the preceding claims, wherein preferably the shut-off valve (1) is integrated into a tank unit (14) connected to the fuel gas tank (2).
9. Brenngastank (2) nach Anspruch 8, dadurch gekennzeichnet, dass in die Tankeinheit (14) mindestens ein weiteres Ventil (15), insbesondere ein Rückschlagventil zum Betanken eines Speichervolumens (13) des Brenngastanks (2), integriert ist. 9. Fuel gas tank (2) according to claim 8, characterized in that at least one further valve (15), in particular a check valve for refueling a storage volume (13) of the fuel gas tank (2), is integrated into the tank unit (14).
10. Brenngastanksystem, umfassend mindestens einen Brenngastank (2) nach Anspruch 8 oder 9. 10. Fuel gas tank system, comprising at least one fuel gas tank (2) according to claim 8 or 9.
PCT/EP2023/068223 2022-08-03 2023-07-03 Shut-off valve for a fuel gas tank, fuel gas tank comprising a shut-off valve, and fuel gas tank system WO2024028010A1 (en)

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DE3523917A1 (en) * 1984-07-11 1986-01-16 Target Rock Corp., East Farmingdale, N.Y. CONTROL VALVE ACTUATED BY A CONTROL BODY
US5048790A (en) * 1990-07-18 1991-09-17 Target Rock Corporation Self-modulating control valve for high-pressure fluid flow
DE102012206604A1 (en) * 2012-04-20 2013-10-24 Hyptec Gmbh Electromagnetic valve for a tank valve of a fuel supply system
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