WO2024099662A1 - Valve assembly for a fuel gas tank, fuel gas tank comprising a valve assembly - Google Patents

Valve assembly for a fuel gas tank, fuel gas tank comprising a valve assembly Download PDF

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Publication number
WO2024099662A1
WO2024099662A1 PCT/EP2023/078010 EP2023078010W WO2024099662A1 WO 2024099662 A1 WO2024099662 A1 WO 2024099662A1 EP 2023078010 W EP2023078010 W EP 2023078010W WO 2024099662 A1 WO2024099662 A1 WO 2024099662A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
fuel gas
path
gas tank
shut
Prior art date
Application number
PCT/EP2023/078010
Other languages
German (de)
French (fr)
Inventor
Holger Rapp
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 WO2024099662A1 publication Critical patent/WO2024099662A1/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
    • 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
    • F17C2205/0335—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
    • F17C2205/0385—Constructional details of valves, regulators in blocks or units
    • 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
    • F17C2270/0168—Applications for fluid transport or storage on the road by vehicles
    • 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

  • Valve assembly for a fuel gas tank for a fuel gas tank, fuel gas tank with valve assembly
  • the invention relates to a valve assembly for a fuel gas tank.
  • the invention also relates to a fuel gas tank with a valve assembly according to the invention.
  • the fuel gas can in particular be hydrogen or natural gas, which is stored under pressure in a fuel gas tank.
  • the preferred field of application of the invention is fuel cell and/or gas vehicles that are powered by a fuel gas.
  • the fuel gas tank is usually designed as a high-pressure tank, in particular as a high-pressure gas bottle.
  • a high-pressure tank always requires a shut-off valve to seal the tank tightly when the vehicle is not in use.
  • the shut-off valve is usually designed as a valve that is closed when there is no current.
  • the shut-off valve is usually integrated into a valve assembly that allows both the extraction of fuel gas from the fuel gas tank and the filling of the fuel gas tank with fuel gas.
  • the valve assembly has a base body in which a extraction path and a filling path are formed.
  • a controllable shut-off valve is integrated into the extraction path and a check valve is integrated into the filling path.
  • the check valve prevents fuel gas from escaping from the fuel gas tank via the filling path.
  • a further check valve can be arranged in the extraction path so that the flow direction in the two paths is determined via the check valves.
  • DE 10 2016 008 443 A1 provides an example of a tank valve for mounting on a compressed gas container, which has a base body with a gas connection, via which the compressed gas container can be filled on the one hand and gas can be removed from the compressed gas container on the other.
  • the gas connection is divided into a refueling line and a withdrawal line, with a withdrawal valve arranged in the withdrawal line.
  • a check valve connected in series with the withdrawal valve blocks the flow against the intended flow direction when gas is withdrawn. The check valve thus prevents gas from flowing into the compressed gas container via the withdrawal line during refueling.
  • Another check valve is integrated in the refueling line, which opens in the refueling direction and closes in the withdrawal direction.
  • the present invention is concerned with the object of specifying a valve assembly for a fuel gas tank which, for example, allows emergency refueling of the fuel gas tank via the removal path if the refueling path is blocked or the check valve in the refueling path is jammed.
  • valve assembly with the features of claim 1 is proposed.
  • Advantageous further developments of the invention can be found in the subclaims.
  • a fuel gas tank with a valve assembly according to the invention is specified.
  • the valve assembly proposed for a fuel gas tank comprises a base body in which a removal path with an integrated shut-off valve for removing fuel gas from the fuel gas tank and a refueling path with an integrated check valve for refueling the fuel gas tank with fuel gas are formed, wherein the removal path and the refueling path are combined within the base body in a path that opens into a common gas connection.
  • at least two further gas flow paths are formed in the base body, each of which bypasses the shut-off valve and forms a downstream section of the removal path arranged downstream of the shut-off valve in the removal direction.
  • an inflow-side section of the extraction path arranged upstream of the shut-off valve and/or with a storage volume formed in the fuel gas tank.
  • the flow direction in the extraction path is determined by a first check valve arranged in the inflow-side section and a second check valve arranged in the outflow-side section, and the flow through the two further gas flow paths in the extraction direction is blocked by a check valve each.
  • the two additional gas flow paths together with the shut-off valve, form an emergency refueling path that can be used to refuel the fuel gas tank in the event of a malfunction in the actual refueling path. All that is required is to actively open the shut-off valve.
  • the refueling pressure then opens the check valves arranged in the two additional gas flow paths, so that the fuel gas tank is refueled via the two additional gas flow paths and the open shut-off valve.
  • the two check valves integrated into the extraction path ensure that the shut-off valve can only be flowed through in the forward direction and therefore only when it is activated. This means that the shut-off valve cannot open accidentally during a normal refueling process.
  • a first gas flow path branches off from the extraction path upstream of the check valve integrated into the downstream section of the extraction path and flows into the extraction path or directly into the storage volume of the fuel gas tank upstream of the check valve integrated into the upstream section of the extraction path.
  • Pressure relief can thus be achieved via the first gas flow path, which ensures that the pressure on the downstream side of the shut-off valve is never greater than the pressure in the fuel gas tank.
  • the first gas flow path can therefore be referred to as a pressure relief path.
  • the shut-off valve can be bypassed via the pressure relief path in order to connect the downstream side with the upstream side or with the storage volume of the fuel gas tank.
  • a second gas flow path preferably branches off from the extraction path downstream of the check valve integrated in the downstream section of the extraction path and opens downstream of the check valve integrated in the upstream section of the extraction path integrated check valve - on the inflow side of the shut-off valve - into the extraction path.
  • Pressure equalization can be achieved via the second gas flow path, which ensures that the pressure on the inflow side of the shut-off valve is never lower than the pressure in the area of the gas connection.
  • the component can have two valve closing elements, between which a spring is arranged, by which each valve closing element is pre-tensioned in the direction of a valve seat.
  • the component can be connected to the inflow side of the shut-off valve via the space between the two valve closing elements that accommodates the spring.
  • the component can have a one-piece valve closing element with a circumferential groove and longitudinal grooves that can be moved back and forth between two valve seats.
  • the component can be connected to the inflow side of the shut-off valve via the circumferential groove.
  • the longitudinal grooves connect the circumferential groove with the gas volumes at the valve seats.
  • the valve element is moved purely pneumatically into either one or the other end position, so that one valve seat is open and the other closed. Both valve seats are never open or closed at the same time.
  • the opening and closing of the check valves can therefore be achieved purely pneumatically. This means that a spring is not required.
  • the shut-off valve is preferably electrically controlled and/or designed as a normally closed valve.
  • the shut-off valve can be designed to be particularly compact and robust.
  • the shut-off valve can be actively opened to remove fuel gas from the fuel gas tank or to carry out emergency refueling.
  • the common gas connection is designed as a connecting piece, preferably as a connecting piece with an external thread.
  • the connecting piece facilitates the connection of an external gas line, via which fuel gas can be taken from the fuel gas tank and fuel gas can be supplied to the fuel gas tank when refueling. If the connecting piece has an external thread, the external gas line can be screwed onto the connecting piece, so that a high-pressure-resistant connection is established between the gas line and the valve assembly via the screw connection.
  • the base body preferably has a connecting section for connection to the fuel gas tank.
  • the valve assembly can be easily mounted on a fuel gas tank via the connecting section.
  • the valve assembly can be inserted into a bottle neck of a fuel gas tank designed as a high-pressure gas bottle via the connecting section.
  • the connecting section can also have an external thread so that it can be screwed into the bottle neck in order to achieve a high-pressure-resistant connection via the screw connection.
  • the fuel gas tank also proposed is characterized in that it has a valve assembly according to the invention.
  • the valve assembly is preferably inserted into the fuel gas tank in sections so that the common gas connection is accessible from the outside. Since the extraction path and the refueling path are brought together and lead as one path into the common gas connection of the valve assembly, only one gas line needs to be connected for extracting fuel gas and for refueling the fuel gas tank with fuel gas.
  • Fig. 1 is a schematic representation of a valve assembly according to the invention inserted into a fuel gas tank with arrows to show the gas flow directions when removing fuel gas from the fuel gas tank and during regular refueling of the fuel gas tank with fuel gas
  • Fig. 2 is a schematic representation of a further valve assembly according to the invention inserted into a fuel gas tank with arrows to show the gas flow directions when removing fuel gas from the fuel gas tank and during regular refueling of the fuel gas tank with fuel gas
  • Fig. 2 is a schematic representation of a further valve assembly according to the invention inserted into a fuel gas tank with arrows to show the gas flow directions when removing fuel gas from the fuel gas tank and during regular refueling of the fuel gas tank with fuel gas
  • Fig. 3 is a schematic representation of the valve assembly of Figure 2 with an arrow to show the gas flow direction during emergency refueling of the fuel gas tank via the actively opened shut-off valve,
  • Fig. 4 shows a longitudinal section through two check valves opening in opposite directions, which are combined to form a component with two valve closing elements, whereby a spring arranged between the two valve closing elements applies a closing force to both valve closing elements in the direction of a valve seat,
  • Fig. 5 is a longitudinal section through two check valves opening in opposite directions, which are combined to form a component with a one-piece valve closing element,
  • Fig. 6 a cross section through the component of Figure 5 and
  • Fig. 7 shows a further longitudinal section through the component of Figure 5, but in a different switching position.
  • the valve assembly 1 according to the invention shown in Figure 1 serves to remove fuel gas from a fuel gas tank 2 and to fill the fuel gas tank 2 with fuel gas, in particular with hydrogen or with natural gas.
  • the valve assembly 1 shown has a base body 3 with a connecting section 16, via which the valve assembly 1 is connected to the fuel gas tank 2. At the other end, the base body 3 forms a gas connection 8 for the connection of an external gas line (not shown). In order to connect only one gas line must, a removal path 4 formed in the base body 3 and a refueling path 5 formed in the base body 3 are combined to form a path 9 which opens into the gas connection 8.
  • a shut-off valve 6 is integrated into the extraction path 4, which can be controlled electrically and is designed as a normally closed valve.
  • a first check valve 12 is arranged, which opens in the extraction direction.
  • a second check valve 13 is arranged, which also opens in the extraction direction.
  • the extraction path 4 thus leads via an inflow-side first section 4.1, in which the check valve 12 is integrated, the shut-off valve 6 and a downflow-side second section 4.2, in which the check valve 13 is integrated.
  • the downstream section 4.2 is connected to the upstream section 4.1 via two further gas flow paths 10, 11, bypassing the shut-off valve 6.
  • a check valve 14, 15 is arranged in each of these gas flow paths 10, 11 in such a way that it blocks in the removal direction.
  • the first gas flow path 10 branches off in the extraction direction (arrow 18) upstream of the check valve 13 from the downstream section 4.2 of the extraction path 4 and flows upstream of the check valve 12 into the upstream section 4.1 of the extraction path 4. Via the first gas flow path 10, pressure relief in the direction of the fuel gas tank 2 (see arrow 27) can be ensured, which prevents the pressure p ou t on the downstream side of the shut-off valve 6 from rising above the pressure pi in the fuel gas tank 2.
  • the second gas flow path 11 branches off in the extraction direction (arrow 18) downstream of the check valve 13 and downstream of the shut-off valve 6 from the downstream section 4.2 of the extraction path 4 and flows downstream of the check valve 12 and upstream of the shut-off valve 6 into the inflow section 4.1 of the extraction path 4.
  • a pressure equalization can be effected in the direction of the inflow side (arrow 28) of the shut-off valve 6, which prevents the inflow-side pressure pi n at the shut-off valve 6 from falling below the pressure P2 at the gas connection 8.
  • the check valve 12 ensures that the pressure pi n on the inflow side of the shut-off valve 6 does not fall below the pressure pi in the fuel gas tank 2 and at the same time the check valve 13 ensures that the pressure p ou t on the outflow side of the shut-off valve 6 does not rise above the pressure P2 at the gas connection 8, it is certain that the pressure p ou t on the outflow side of the shut-off valve 6 never exceeds the pressure pi n on the inflow side of the shut-off valve 6. This prevents the shut-off valve 6 from opening unintentionally and/or flowing through in the reverse direction.
  • Another check valve 7 is integrated into the refueling path 5, which opens in the refueling direction (arrow 17) when the pressure P2 in the area of the gas connection 8 is greater than the pressure pi in the fuel gas tank 2. If the refueling path 5 is blocked, emergency refueling can be carried out via the two gas flow paths 10, 11 and the section of the extraction path 4 leading via the shut-off valve 6 by actively opening the shut-off valve 6.
  • Figures 2 and 3 show a further preferred embodiment of a valve assembly 1 according to the invention.
  • a bore intersection can be dispensed with, so that the high-pressure resistance of the valve assembly 1 is increased.
  • arrow 17 indicates the refueling direction in which the fuel gas flows into the fuel gas tank 2 via the refueling path 5 when refueling the fuel gas tank 2.
  • Arrow 18 indicates the removal direction in which the fuel gas flows when removing fuel gas from the fuel gas tank 2.
  • Arrows 27 and 28 in turn indicate the gas flow direction in the other gas flow paths 10, 11 to achieve pressure relief or pressure equalization.
  • the gas flow direction during emergency refueling of the fuel gas tank 2 via the actively opened shut-off valve 6 and the gas flow paths 10, 11 is indicated by an arrow 19.
  • valve assembly 1 In order to create a valve assembly 1 that is as compact as possible, the two check valves 12 and 15, which open in opposite directions and are connected via their respective downstream sides, can be combined to form a component 20. Possible embodiments are shown in Figures 4 to 7.
  • FIG. 4 A first preferred embodiment of a component 20 is shown in Figure 4.
  • the component 20 has two valve closing elements 23.1, 23.2, wherein each valve closing element 23.1, 23.2 is prestressed in the direction of an associated valve seat 21, 22 via an intermediate, common spring 24.
  • the spring 24 is accommodated in a valve chamber 29, which connects the component 20 to the inflow side of the shut-off valve 6 or to the inflow-side section 4.1 of the extraction path 4.
  • the check valve 12 opens against the spring force of the spring 24, while the valve closing element 23.2 is pressed against the valve seat 22 and closes the check valve 15.
  • the check valve 15 opens with the valve closing element 23.2 against the spring force of the spring 24, while the valve closing element 23.1 is pressed against the valve seat 21 and closes the check valve 12.
  • valve closing element 23 is designed in one piece and is controlled solely by pressure, i.e. pneumatically, so that a spring 24 is not required.
  • the valve closing element 23 has a circumferential groove 25, via which the valve chamber 29 is connected to the inflow side of the shut-off valve 6 or to the inflow-side section 4.1 of the extraction path 4.
  • valve closing element 23 Since the valve closing element 23 is guided radially, it also has at least one longitudinal groove 26 on each side of the circumferential groove 25, which opens into the circumferential groove 25 and serves as a gas flow channel (see Figure 6).
  • the valve seat 21 When the valve seat 21 is open, the gas flows from there via the at least one longitudinal groove 26 between the circumferential groove 25 and the end of the guide of the valve closing element 23 facing the valve seat 21 to the valve chamber 29.
  • valve seat 22 When the valve seat 22 is open, the gas flows from there via the at least one longitudinal groove 26 between the circumferential groove 25 and the end of the guide of the valve closing element 23 facing the valve seat 22 to the valve chamber 29.
  • Figure 5 shows the valve closing element 23 in a switching position which it assumes when P2 > pi. Pressure equalization can then be achieved via the open check valve 15, which prevents the shut-off valve 6 from opening accidentally. During emergency refueling, the valve closing element 23 also assumes the switching position shown in Figure 5. The check valve 12 is closed in this switching position.
  • Figure 7 shows the valve closing element 23 in a switching position which it assumes when P2 ⁇ pi and the shut-off valve 6 is actively opened. Fuel gas can then be removed from the fuel gas tank 2 and led to the gas connection 8 via the open check valve 12, the open shut-off valve 6 and the also open check valve 13. The check valve 15 is closed in this switching position.
  • a valve assembly according to the invention can have additional valves and/or components in addition to the valves shown.
  • a manual shut-off and/or blow-off valve, a thermal and/or pressure-controlled safety valve and a temperature and/or pressure sensor can be integrated into the valve assembly.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

The invention relates to a valve assembly (1) for a fuel gas tank (2), comprising a base body (3) in which an extraction path (4) with an integrated shut-off valve (6) for extracting fuel gas from the fuel gas tank (2) and a refuelling path (5) with an integrated non-return valve (7) for refuelling the fuel gas tank (2) with fuel gas are formed, wherein the extraction path (4) and the refuelling path (5) are brought together within the base body (3) in a path (9) which opens into a common gas connection (8). According to the invention, at least two further gas flow paths (10, 11) are formed in the base body (3), each of which bypasses the shut-off valve (6) and connects an outflow-side section (4.2) of the extraction path (4) arranged downstream of the shut-off valve (6) in the extraction direction with an inflow-side section (4. 1) of the extraction path (4) and/or to a storage volume formed in the fuel gas tank (2), wherein the flow direction in the extraction path (4) is predetermined by a first non-return valve (12) arranged in the inflow-side section (4.1) and a second non-return valve (13) arranged in the outflow-side section (4.2) and the flow through the two further gas flow paths (10, 11) in the extraction direction is blocked by a respective non-return valve (14, 15). The invention further relates to a fuel gas tank (2) having the claimed valve assembly (1).

Description

Beschreibung Description
Ventilbaugruppe für einen Brenngastank, Brenngastank mit Ventilbaugruppe Valve assembly for a fuel gas tank, fuel gas tank with valve assembly
Die Erfindung betrifft eine Ventilbaugruppe für einen Brenngastank. Ferner betrifft die Erfindung einen Brenngastank mit einer erfindungsgemäßen Ventilbaugruppe. Bei dem Brenngas kann es sich insbesondere um Wasserstoff oder Erdgas handeln, das in einem Brenngastank unter Druck gespeichert wird. The invention relates to a valve assembly for a fuel gas tank. The invention also relates to a fuel gas tank with a valve assembly according to the invention. The fuel gas can in particular be hydrogen or natural gas, which is stored under pressure in a fuel gas tank.
Bevorzugter Anwendungsbereich der Erfindung sind Brennstoffzellen- und/oder Gasfahrzeuge, die mit Hilfe eines Brenngases angetrieben werden. The preferred field of application of the invention is fuel cell and/or gas vehicles that are powered by a fuel gas.
Stand der Technik State of the art
Bekannt sind mobile Brenngastanksysteme mit mindestens einem Brenngastank zur Speicherung von Brenngas, beispielsweise Wasserstoff oder Erdgas. Der Brenngastank ist dabei in der Regel als Hochdrucktank ausgelegt, insbesondere als Hochdruck- Gasflasche. Ein Hochdrucktank benötigt immer ein Absperrventil, um den Tank dicht abzusperren, wenn das Fahrzeug nicht in Betrieb ist. Aus Gründen der Sicherheit ist das Absperrventil in der Regel als stromlos geschlossenes Ventil ausgeführt. Mobile fuel gas tank systems with at least one fuel gas tank for storing fuel gas, such as hydrogen or natural gas, are known. The fuel gas tank is usually designed as a high-pressure tank, in particular as a high-pressure gas bottle. A high-pressure tank always requires a shut-off valve to seal the tank tightly when the vehicle is not in use. For safety reasons, the shut-off valve is usually designed as a valve that is closed when there is no current.
Das Absperrventil ist üblicherweise in eine Ventilbaugruppe integriert, die sowohl die Entnahme von Brenngas aus dem Brenngastank als auch das Betanken des Brenngastanks mit Brenngas ermöglicht. Die Ventilbaugruppe weist hierzu einen Grundkörper auf, in dem ein Entnahmepfad und ein Betankungspfad ausgebildet sind. In den Entnahmepfad ist ein ansteuerbares Absperrventil und in den Betankungspfad ist ein Rückschlagventil integriert. Das Rückschlagventil verhindert ein Entweichen von Brenngas aus dem Brenngastank über den Betankungspfad. Im Entnahmepfad kann ein weiteres Rückschlagventil angeordnet sein, so dass über die Rückschlagventile die Strömungsrichtung in den beiden Pfaden festgelegt ist. Aus der DE 10 2016 008 443 Al geht beispielhaft ein Tankventil zur Montage an einem Druckgasbehälter hervor, das einen Grundkörper mit einem Gasanschluss aufweist, über den einerseits der Druckgasbehälter betankt, andererseits Gas aus dem Druckgasbehälter entnommen werden kann. Innerhalb des Grundkörpers teilt sich der Gasanschluss in eine Betankungsleitung und eine Entnahmeleitung auf, wobei in der Entnahmeleitung ein Entnahmeventil angeordnet ist. Ein in Reihe mit dem Entnahmeventil geschaltetes Rückschlagventil sperrt bei der Entnahme von Gas den Durchfluss entgegen der vorgesehenen Strömungsrichtung. Das Rückschlagventil verhindert somit, dass beim Betanken Gas über die Entnahmeleitung in den Druckgasbehälter strömt. In der Betankungsleitung ist ein weiteres Rückschlagventil integriert, das in Betankungsrichtung öffnet und in Entnahmerichtung sperrt. The shut-off valve is usually integrated into a valve assembly that allows both the extraction of fuel gas from the fuel gas tank and the filling of the fuel gas tank with fuel gas. For this purpose, the valve assembly has a base body in which a extraction path and a filling path are formed. A controllable shut-off valve is integrated into the extraction path and a check valve is integrated into the filling path. The check valve prevents fuel gas from escaping from the fuel gas tank via the filling path. A further check valve can be arranged in the extraction path so that the flow direction in the two paths is determined via the check valves. DE 10 2016 008 443 A1 provides an example of a tank valve for mounting on a compressed gas container, which has a base body with a gas connection, via which the compressed gas container can be filled on the one hand and gas can be removed from the compressed gas container on the other. Within the base body, the gas connection is divided into a refueling line and a withdrawal line, with a withdrawal valve arranged in the withdrawal line. A check valve connected in series with the withdrawal valve blocks the flow against the intended flow direction when gas is withdrawn. The check valve thus prevents gas from flowing into the compressed gas container via the withdrawal line during refueling. Another check valve is integrated in the refueling line, which opens in the refueling direction and closes in the withdrawal direction.
Die vorliegende Erfindung ist mit der Aufgabe befasst, eine Ventilbaugruppe für einen Brenngastank anzugeben, die, beispielsweise bei blockiertem Betankungspfad oder klemmendem Rückschlagventil im Betankungspfad, eine Notbetankung des Brenngastanks über den Entnahmepfad zulässt. The present invention is concerned with the object of specifying a valve assembly for a fuel gas tank which, for example, allows emergency refueling of the fuel gas tank via the removal path if the refueling path is blocked or the check valve in the refueling path is jammed.
Zur Lösung der Aufgabe wird die Ventilbaugruppe mit den Merkmalen des Anspruchs 1 vorgeschlagen. Vorteilhafte Weiterbildungen der Erfindung sind den Unteransprüchen zu entnehmen. Des Weiteren wird ein Brenngastank mit einer erfindungsgemäßen Ventilbaugruppe angegeben. To solve the problem, the valve assembly with the features of claim 1 is proposed. Advantageous further developments of the invention can be found in the subclaims. Furthermore, a fuel gas tank with a valve assembly according to the invention is specified.
Offenbarung der Erfindung Disclosure of the invention
Die für einen Brenngastank vorgeschlagene Ventilbaugruppe umfasst einen Grundkörper, in dem ein Entnahmepfad mit integriertem Absperrventil zur Entnahme von Brenngas aus dem Brenngastank sowie ein Betankungspfad mit integriertem Rückschlagventil zum Betanken des Brenngastanks mit Brenngas ausgebildet sind, wobei der Entnahmepfad und der Betankungspfad innerhalb des Grundkörpers in einem Pfad zusammengeführt sind, der in einen gemeinsamen Gasanschluss mündet. Erfindungsgemäß sind im Grundkörper mindestens zwei weitere Gasströmungspfade ausgebildet, die jeweils unter Umgehung des Absperrventils einen in Entnahmerichtung stromabwärts des Absperrventils angeordneten, abströmseitigen Abschnitt des Entnahmepfads mit einem stromaufwärts des Absperrventils angeordneten, zuströmseitigen Abschnitt des Entnahmepfads und/oder mit einem im Brenngastank ausgebildeten Speichervolumen verbinden. Die Strömungsrichtung im Entnahmepfad ist durch ein im zuströmseitigen Abschnitt angeordnetes erstes Rückschlagventil sowie ein im abströmseitigen Abschnitt angeordnetes zweites Rückschlagventil vorgegeben und die Durchströmung der zwei weiteren Gasströmungspfade in Entnahmerichtung ist durch jeweils ein Rückschlagventil gesperrt. The valve assembly proposed for a fuel gas tank comprises a base body in which a removal path with an integrated shut-off valve for removing fuel gas from the fuel gas tank and a refueling path with an integrated check valve for refueling the fuel gas tank with fuel gas are formed, wherein the removal path and the refueling path are combined within the base body in a path that opens into a common gas connection. According to the invention, at least two further gas flow paths are formed in the base body, each of which bypasses the shut-off valve and forms a downstream section of the removal path arranged downstream of the shut-off valve in the removal direction. with an inflow-side section of the extraction path arranged upstream of the shut-off valve and/or with a storage volume formed in the fuel gas tank. The flow direction in the extraction path is determined by a first check valve arranged in the inflow-side section and a second check valve arranged in the outflow-side section, and the flow through the two further gas flow paths in the extraction direction is blocked by a check valve each.
Die beiden weiteren Gasströmungspfade bilden zusammen mit dem Absperrventil einen Notbetankungspfad, der bei einer Störung im eigentlichen Betankungspfad zur Betankung des Brenngastanks genutzt werden kann. Hierzu muss lediglich das Absperrventil aktiv geöffnet werden. Der Betankungsdruck öffnet dann die in den beiden weiteren Gasströmungspfaden angeordneten Rückschlagventile, so dass der Brenngastank über die beiden weiteren Gasströmungspfade und das geöffnete Absperrventil betankt wird. Zugleich ist über die beiden in den Entnahmepfad integrierten Rückschlagventile sichergestellt, dass das Absperrventil dabei nur in Vorwärtsrichtung und damit nur im angesteuerten Zustand durchflossen werden kann. Ein ungewolltes Öffnen des Absperrventils während eines normal ablaufenden Betankungsvorgangs ist somit ausgeschlossen. The two additional gas flow paths, together with the shut-off valve, form an emergency refueling path that can be used to refuel the fuel gas tank in the event of a malfunction in the actual refueling path. All that is required is to actively open the shut-off valve. The refueling pressure then opens the check valves arranged in the two additional gas flow paths, so that the fuel gas tank is refueled via the two additional gas flow paths and the open shut-off valve. At the same time, the two check valves integrated into the extraction path ensure that the shut-off valve can only be flowed through in the forward direction and therefore only when it is activated. This means that the shut-off valve cannot open accidentally during a normal refueling process.
Bevorzugt zweigt ein erster Gasströmungspfad stromaufwärts des in den abströmseitigen Abschnitt des Entnahmepfads integrierten Rückschlagventils vom Entnahmepfad ab und mündet stromaufwärts des in den zuströmseitigen Abschnitt des Entnahmepfads integrierten Rückschlagventils in den Entnahmepfad oder direkt in das Speichervolumen des Brenngastanks. Über den ersten Gasströmungspfad kann somit eine Druckentlastung bewirkt werden, die sicherstellt, dass der Druck auf der Abströmseite des Absperrventils niemals größer als der Druck im Brenngastank ist. Der erste Gasströmungspfad kann demnach als Druckentlastungspfad bezeichnet werden. Über den Druckentlastungspfad kann das Absperrventil umgangen werden, um die Abströmseite mit der Zuströmseite bzw. mit dem Speichervolumen des Brenngastanks zu verbinden. Preferably, a first gas flow path branches off from the extraction path upstream of the check valve integrated into the downstream section of the extraction path and flows into the extraction path or directly into the storage volume of the fuel gas tank upstream of the check valve integrated into the upstream section of the extraction path. Pressure relief can thus be achieved via the first gas flow path, which ensures that the pressure on the downstream side of the shut-off valve is never greater than the pressure in the fuel gas tank. The first gas flow path can therefore be referred to as a pressure relief path. The shut-off valve can be bypassed via the pressure relief path in order to connect the downstream side with the upstream side or with the storage volume of the fuel gas tank.
Ferner bevorzugt zweigt ein zweiter Gasströmungspfad stromabwärts des in den abströmseitigen Abschnitt des Entnahmepfads integrierten Rückschlagventils vom Entnahmepfad ab und mündet stromabwärts des in den zuströmseitigen Abschnitt des Entnahmepfads integrierten Rückschlagventils - auf der Zuströmseite des Absperrventils - in den Entnahmepfad. Über den zweiten Gasströmungspfad kann ein Druckausgleich bewirkt werden, der sicherstellt, dass der Druck auf der Zuströmseite des Absperrventils niemals geringer als der Druck im Bereich des Gasanschlusses ist. Furthermore, a second gas flow path preferably branches off from the extraction path downstream of the check valve integrated in the downstream section of the extraction path and opens downstream of the check valve integrated in the upstream section of the extraction path integrated check valve - on the inflow side of the shut-off valve - into the extraction path. Pressure equalization can be achieved via the second gas flow path, which ensures that the pressure on the inflow side of the shut-off valve is never lower than the pressure in the area of the gas connection.
In Weiterbildung der Erfindung wird vorgeschlagen, dass zwei gegengleich öffnende Rückschlagventile zu einem Bauelement zusammengefasst sind. Auf diese Weise kann die Ventilbaugruppe vereinfacht und zugleich kompakter gestaltet werden. In a further development of the invention, it is proposed that two check valves that open in opposite directions are combined into one component. In this way, the valve assembly can be simplified and at the same time made more compact.
Das Bauelement kann hierzu zwei Ventilschließelemente aufweisen, zwischen denen eine Feder angeordnet ist, durch die jedes Ventilschließelement in Richtung eines Ventilsitzes vorgespannt ist. Über den die Feder aufnehmenden Raum zwischen den beiden Ventilschließelementen kann das Bauelement an die Zuströmseite des Absperrventils angebunden werden. For this purpose, the component can have two valve closing elements, between which a spring is arranged, by which each valve closing element is pre-tensioned in the direction of a valve seat. The component can be connected to the inflow side of the shut-off valve via the space between the two valve closing elements that accommodates the spring.
Alternativ kann das Bauelement ein einteilig ausgeführtes, zwischen zwei Ventilsitzen hin und her bewegliches Ventilschließelement mit einer Umfangsnut und Längsnuten aufweisen. Über die Umfangsnut kann das Bauelement an die Zuströmseite des Absperrventils angebundenen werden. Die Längsnuten verbinden die Umfangsnut mit den Gasvolumina an den Ventilsitzen. Je nach Druckverhältnissen außerhalb der beiden Ventilsitze wird das Ventilelement rein pneumatisch entweder in die eine oder die andere Endlage gebracht, so dass jeweils ein Ventilsitz offen und der andere geschlossen ist. Niemals sind beide Ventilsitze gleichzeitig offen oder geschlossen. Das Öffnen und Schließen der Rückschlagventile kann somit rein pneumatisch bewirkt werden. Das heißt, dass eine Feder entbehrlich ist. Alternatively, the component can have a one-piece valve closing element with a circumferential groove and longitudinal grooves that can be moved back and forth between two valve seats. The component can be connected to the inflow side of the shut-off valve via the circumferential groove. The longitudinal grooves connect the circumferential groove with the gas volumes at the valve seats. Depending on the pressure conditions outside the two valve seats, the valve element is moved purely pneumatically into either one or the other end position, so that one valve seat is open and the other closed. Both valve seats are never open or closed at the same time. The opening and closing of the check valves can therefore be achieved purely pneumatically. This means that a spring is not required.
Das Absperrventil ist vorzugsweise elektrisch ansteuerbar und/oder als stromlos geschlossenes Ventil ausgeführt. Als elektrisch ansteuerbares Ventil kann das Absperrventil besonders kompakt und robust ausgeführt werden. Zudem kann das Absperrventil aktiv geöffnet werden, um Brenngas aus dem Brenngastank zu entnehmen oder eine Notbetankung vorzunehmen. In der Ausführung als stromlos geschlossenes Ventil erfüllt es die an einen Brenngastank gestellten Sicherheitsanforderungen. Des Weiteren wird vorgeschlagen, dass der gemeinsame Gasanschluss als Anschlussstutzen, vorzugsweise als Anschlussstutzen mit einem Außengewinde, ausgeführt ist. Der Anschlussstutzen erleichtert den Anschluss einer externen Gasleitung, über die Brenngas aus dem Brenngastank entnommen sowie Brenngas dem Brenngastank beim Betanken zugeführt werden kann. Sofern der Anschlussstutzen ein Außengewinde aufweist, kann die externe Gasleitung auf den Anschlussstutzen aufgeschraubt werden, so dass über die Schraubverbindung eine hochdruckfeste Verbindung zwischen der Gasleitung und der Ventilbaugruppe hergestellt ist. The shut-off valve is preferably electrically controlled and/or designed as a normally closed valve. As an electrically controlled valve, the shut-off valve can be designed to be particularly compact and robust. In addition, the shut-off valve can be actively opened to remove fuel gas from the fuel gas tank or to carry out emergency refueling. In the design as a normally closed valve, it meets the safety requirements for a fuel gas tank. It is also proposed that the common gas connection is designed as a connecting piece, preferably as a connecting piece with an external thread. The connecting piece facilitates the connection of an external gas line, via which fuel gas can be taken from the fuel gas tank and fuel gas can be supplied to the fuel gas tank when refueling. If the connecting piece has an external thread, the external gas line can be screwed onto the connecting piece, so that a high-pressure-resistant connection is established between the gas line and the valve assembly via the screw connection.
Ferner bevorzugt weist der Grundkörper einen Verbindungsabschnitt zur Verbindung mit dem Brenngastank auf. Über den Verbindungsabschnitt kann die Ventilbaugruppe einfach an einem Brenngastank montiert werden. Beispielsweise kann die Ventilbaugruppe über den Verbindungsabschnitt in einen Flaschenhals eines als Hochdruck- Gasflasche ausgeführten Brenngastanks eingesetzt werden. Der Verbindungsabschnitt kann ferner ein Außengewinde aufweisen, so dass er in den Flaschenhals einschraubbar ist, um über die Schraubverbindung eine hochdruckfeste Verbindung zu erzielen. Furthermore, the base body preferably has a connecting section for connection to the fuel gas tank. The valve assembly can be easily mounted on a fuel gas tank via the connecting section. For example, the valve assembly can be inserted into a bottle neck of a fuel gas tank designed as a high-pressure gas bottle via the connecting section. The connecting section can also have an external thread so that it can be screwed into the bottle neck in order to achieve a high-pressure-resistant connection via the screw connection.
Der darüber hinaus vorgeschlagene Brenngastank zeichnet sich dadurch aus, dass er eine erfindungsgemäße Ventilbaugruppe aufweist. Vorzugsweise ist die Ventilbaugruppe abschnittsweise in den Brenngastank eingesetzt ist, so dass der gemeinsame Gasanschluss von außen zugänglich ist. Da der Entnahmepfad und der Betankungspfad zusammengeführt werden und als ein Pfad in den gemeinsamen Gasanschluss der Ventilbaugruppe münden, muss nur eine Gasleitung zur Entnahme von Brenngas sowie zum Betanken des Brenngastanks mit Brenngas angeschlossen werden. The fuel gas tank also proposed is characterized in that it has a valve assembly according to the invention. The valve assembly is preferably inserted into the fuel gas tank in sections so that the common gas connection is accessible from the outside. Since the extraction path and the refueling path are brought together and lead as one path into the common gas connection of the valve assembly, only one gas line needs to be connected for extracting fuel gas and for refueling the fuel gas tank with fuel gas.
Bevorzugte Ausführungsformen der Erfindung werden nachfolgend anhand der beigefügten Zeichnungen näher erläutert. Diese zeigen: Preferred embodiments of the invention are explained in more detail below with reference to the accompanying drawings, which show:
Fig. 1 eine schematische Darstellung einer in einen Brenngastank eingesetzten erfindungsgemäßen Ventilbaugruppe mit Pfeilen zur Darstellung der Gasströmungsrichtungen bei der Entnahme von Brenngas aus dem Brenngastank sowie beim regulären Betanken des Brenngastanks mit Brenngas, Fig. 2 eine schematische Darstellung einer in einen Brenngastank eingesetzten weiteren erfindungsgemäßen Ventilbaugruppe mit Pfeilen zur Darstellung der Gasströmungsrichtungen bei der Entnahme von Brenngas aus dem Brenngastank sowie beim regulären Betanken des Brenngastanks mit Brenngas, Fig. 1 is a schematic representation of a valve assembly according to the invention inserted into a fuel gas tank with arrows to show the gas flow directions when removing fuel gas from the fuel gas tank and during regular refueling of the fuel gas tank with fuel gas, Fig. 2 is a schematic representation of a further valve assembly according to the invention inserted into a fuel gas tank with arrows to show the gas flow directions when removing fuel gas from the fuel gas tank and during regular refueling of the fuel gas tank with fuel gas,
Fig. 3 eine schematische Darstellung der Ventilbaugruppe der Figur 2 mit einem Pfeil zur Darstellung der Gasströmungsrichtung beim Notbetanken des Brenngastanks über das aktiv geöffnete Absperrventil, Fig. 3 is a schematic representation of the valve assembly of Figure 2 with an arrow to show the gas flow direction during emergency refueling of the fuel gas tank via the actively opened shut-off valve,
Fig. 4 einen Längsschnitt durch zwei gegengleich öffnende Rückschlagventile, die zu einem Bauelement mit zwei Ventilschließelementen zusammengefasst sind, wobei eine zwischen den beiden Ventilschließelementen angeordnete Feder beide Ventilschließelemente jeweils in Richtung eines Ventilsitzes mit einer Schließkraft beaufschlagt, Fig. 4 shows a longitudinal section through two check valves opening in opposite directions, which are combined to form a component with two valve closing elements, whereby a spring arranged between the two valve closing elements applies a closing force to both valve closing elements in the direction of a valve seat,
Fig. 5 einen Längsschnitt durch zwei gegengleich öffnende Rückschlagventile, die zu einem Bauelement mit einem einteiligen Ventilschließelement zusammengefasst sind, Fig. 5 is a longitudinal section through two check valves opening in opposite directions, which are combined to form a component with a one-piece valve closing element,
Fig. 6 einen Querschnitt durch das Bauelement der Figur 5 und Fig. 6 a cross section through the component of Figure 5 and
Fig. 7 einen weiteren Längsschnitt durch das Bauelement der Figur 5, jedoch in einer anderen Schaltstellung. Fig. 7 shows a further longitudinal section through the component of Figure 5, but in a different switching position.
Ausführliche Beschreibung der Zeichnungen Detailed description of the drawings
Die in der Figur 1 dargestellte erfindungsgemäße Ventilbaugruppe 1 dient der Entnahme von Brenngas aus einem Brenngastank 2 sowie dem Betanken des Brenngastanks 2 mit Brenngas, insbesondere mit Wasserstoff oder mit Erdgas. The valve assembly 1 according to the invention shown in Figure 1 serves to remove fuel gas from a fuel gas tank 2 and to fill the fuel gas tank 2 with fuel gas, in particular with hydrogen or with natural gas.
Die dargestellte Ventilbaugruppe 1 weist einen Grundkörper 3 mit einem Verbindungsabschnitt 16 auf, über den die Ventilbaugruppe 1 mit dem Brenngastank 2 verbunden ist. Andernends bildet der Grundkörper 3 einen Gasanschluss 8 für den Anschluss einer externen Gasleitung (nicht dargestellt) aus. Um nur eine Gasleitung anschließen zu müssen, werden ein im Grundkörper 3 ausgebildeter Entnahmepfad 4 sowie ein im Grundkörper 3 ausgebildeter Betankungspfad 5 zu einem Pfad 9 zusammengeführt, der in den Gasanschluss 8 mündet. The valve assembly 1 shown has a base body 3 with a connecting section 16, via which the valve assembly 1 is connected to the fuel gas tank 2. At the other end, the base body 3 forms a gas connection 8 for the connection of an external gas line (not shown). In order to connect only one gas line must, a removal path 4 formed in the base body 3 and a refueling path 5 formed in the base body 3 are combined to form a path 9 which opens into the gas connection 8.
In den Entnahmepfad 4 ist ein Absperrventil 6 integriert, das elektrisch ansteuerbar und als stromlos geschlossenes Ventil ausgeführt ist. In Entnahmerichtung (Pfeil 18) stromaufwärts des Absperrventils 6, das heißt auf der Zuströmseite des Absperrventils 6, ist ein erstes Rückschlagventil 12 angeordnet, das in Entnahmerichtung öffnet. In Entnahmerichtung stromabwärts des Absperrventils 6, das heißt auf der Abströmseite des Absperrventils 6, ist ein zweites Rückschlagventil 13 angeordnet, das ebenfalls in Entnahmerichtung öffnet. Der Entnahmepfad 4 führt somit über einen zuströmseitigen ersten Abschnitt 4.1, in den das Rückschlagventil 12 integriert ist, das Absperrventil 6 und einen abströmseitigen zweiten Abschnitt 4.2, in den das Rückschlagventil 13 integriert ist. Der abströmseitige Abschnitt 4.2 ist über zwei weitere Gasströmungspfade 10, 11 mit dem zuströmseitigen Abschnitt 4.1 verbunden, und zwar unter Umgehung des Absperrventils 6. Um ein Austreten von Brenngas aus dem Brenngastank 2 über die beiden weiteren Gasströmungspfade 10, 11 zu verhindern, ist in jedem dieser Gasströmungspfade 10, 11 ein Rückschlagventil 14, 15 so angeordnet, dass es in der Entnahmerichtung sperrt. A shut-off valve 6 is integrated into the extraction path 4, which can be controlled electrically and is designed as a normally closed valve. In the extraction direction (arrow 18) upstream of the shut-off valve 6, i.e. on the inflow side of the shut-off valve 6, a first check valve 12 is arranged, which opens in the extraction direction. In the extraction direction downstream of the shut-off valve 6, i.e. on the outflow side of the shut-off valve 6, a second check valve 13 is arranged, which also opens in the extraction direction. The extraction path 4 thus leads via an inflow-side first section 4.1, in which the check valve 12 is integrated, the shut-off valve 6 and a downflow-side second section 4.2, in which the check valve 13 is integrated. The downstream section 4.2 is connected to the upstream section 4.1 via two further gas flow paths 10, 11, bypassing the shut-off valve 6. In order to prevent fuel gas from escaping from the fuel gas tank 2 via the two further gas flow paths 10, 11, a check valve 14, 15 is arranged in each of these gas flow paths 10, 11 in such a way that it blocks in the removal direction.
Der erste Gasströmungspfad 10 zweigt in Entnahmerichtung (Pfeil 18) stromaufwärts des Rückschlagventils 13 vom abströmseitigen Abschnitt 4.2 des Entnahmepfads 4 ab und mündet stromaufwärts des Rückschlagventils 12 in den zuströmseitigen Abschnitt 4.1 des Entnahmepfads 4. Über den ersten Gasströmungspfad 10 kann eine Druckentlastung in Richtung Brenngastank 2 (siehe Pfeil 27) sichergestellt werden, die verhindert, dass der Druck pout auf der Abströmseite des Absperrventils 6 über den Druck pi im Brenngastank 2 steigt. The first gas flow path 10 branches off in the extraction direction (arrow 18) upstream of the check valve 13 from the downstream section 4.2 of the extraction path 4 and flows upstream of the check valve 12 into the upstream section 4.1 of the extraction path 4. Via the first gas flow path 10, pressure relief in the direction of the fuel gas tank 2 (see arrow 27) can be ensured, which prevents the pressure p ou t on the downstream side of the shut-off valve 6 from rising above the pressure pi in the fuel gas tank 2.
Der zweite Gasströmungspfad 11 zweigt in Entnahmerichtung (Pfeil 18) stromabwärts des Rückschlagventils 13 und stromabwärts des Absperrventils 6 vom abströmseitigen Abschnitt 4.2 des Entnahmepfads 4 ab und mündet stromabwärts des Rückschlagventils 12 und stromaufwärts des Absperrventils 6 in den zuströmseitigen Abschnitt 4.1 des Entnahmepfads 4. Über den zweiten Gasströmungspfad 11 kann ein Druckausgleich in Richtung der Zuströmseite (Pfeil 28) des Absperrventils 6 bewirkt werden, der verhindert, dass der zuströmseitige Druck pin am Absperrventil 6 unter den Druck P2 am Gasanschluss 8 fällt. Da das Rückschlagventil 12 sicherstellt, dass der Druck pin auf der Zuströmseite des Absperrventils 6 nicht unter den Druck pi im Brenngastank 2 fällt und zugleich das Rückschlagventil 13 sicherstellt, dass der Druck pout auf der Abströmseite des Absperrventils 6 nicht über den Druck P2 am Gasanschluss 8 steigt, steht fest, dass der Druck pout auf der Abströmseite des Absperrventils 6 den Druck pin auf der Zuströmseite des Absperrventils 6 nie übersteigt. Dadurch ist ausgeschlossen, dass das Absperrventil 6 ungewollt öffnet und/oder in Rückwärtsrichtung durchströmt wird. The second gas flow path 11 branches off in the extraction direction (arrow 18) downstream of the check valve 13 and downstream of the shut-off valve 6 from the downstream section 4.2 of the extraction path 4 and flows downstream of the check valve 12 and upstream of the shut-off valve 6 into the inflow section 4.1 of the extraction path 4. Via the second gas flow path 11, a pressure equalization can be effected in the direction of the inflow side (arrow 28) of the shut-off valve 6, which prevents the inflow-side pressure pi n at the shut-off valve 6 from falling below the pressure P2 at the gas connection 8. Since the check valve 12 ensures that the pressure pi n on the inflow side of the shut-off valve 6 does not fall below the pressure pi in the fuel gas tank 2 and at the same time the check valve 13 ensures that the pressure p ou t on the outflow side of the shut-off valve 6 does not rise above the pressure P2 at the gas connection 8, it is certain that the pressure p ou t on the outflow side of the shut-off valve 6 never exceeds the pressure pi n on the inflow side of the shut-off valve 6. This prevents the shut-off valve 6 from opening unintentionally and/or flowing through in the reverse direction.
In den Betankungspfad 5 ist ein weiteres Rückschlagventil 7 integriert, das in Betankungsrichtung (Pfeil 17) öffnet, wenn der Druck P2 im Bereich des Gasanschlusses 8 größer als der Druck pi im Brenngastank 2 ist. Sollte der Betankungspfad 5 blockiert sein, kann durch aktives Öffnen des Absperrventils 6 eine Notbetankung über die beiden Gasströmungspfade 10, 11 sowie den über das Absperrventil 6 führenden Abschnitt des Entnahmepfads 4 vorgenommen werden. Another check valve 7 is integrated into the refueling path 5, which opens in the refueling direction (arrow 17) when the pressure P2 in the area of the gas connection 8 is greater than the pressure pi in the fuel gas tank 2. If the refueling path 5 is blocked, emergency refueling can be carried out via the two gas flow paths 10, 11 and the section of the extraction path 4 leading via the shut-off valve 6 by actively opening the shut-off valve 6.
Den Figuren 2 und 3 ist eine weitere bevorzugte Ausführungsform einer erfindungsgemäßen Ventilbaugruppe 1 zu entnehmen. Diese unterscheidet sich von der der Figur 1 lediglich dadurch, dass der erste Gasströmungspfad 10 nicht in den zuströmseitigen Abschnitt 4.1 des Entnahmepfads 4 mündet, sondern direkt in den Brenngastank 2 bzw. in das Speichervolumen des Brenngastanks 2. Das heißt, dass im Verbindungsabschnitt 16 mindestens drei Bohrungen ausgebildet sind, die in den Brenngastank 2 münden, und zwar eine für den Entnahmepfad 4, eine für den Betankungspfad 5 sowie eine für den Gasströmungspfad 10. Dafür kann jedoch auf eine Bohrungsverschneidung verzichtet werden, so dass die Hochdruckfestigkeit der Ventilbaugruppe 1 gesteigert wird. Figures 2 and 3 show a further preferred embodiment of a valve assembly 1 according to the invention. This differs from that of Figure 1 only in that the first gas flow path 10 does not open into the inflow-side section 4.1 of the extraction path 4, but directly into the fuel gas tank 2 or into the storage volume of the fuel gas tank 2. This means that at least three bores are formed in the connecting section 16, which open into the fuel gas tank 2, namely one for the extraction path 4, one for the refueling path 5 and one for the gas flow path 10. However, this means that a bore intersection can be dispensed with, so that the high-pressure resistance of the valve assembly 1 is increased.
In der Figur 2 zeigt der Pfeil 17 die Betankungsrichtung an, in der beim Betanken des Brenngastanks 2 das Brenngas über den Betankungspfad 5 in den Brenngastank 2 strömt. Pfeil 18 zeigt die Entnahmerichtung an, in der bei der Entnahme von Brenngas aus dem Brenngastank 2 das Brenngas strömt. Die Pfeile 27 und 28 geben wiederum die Gasströmungsrichtung in den weiteren Gasströmungspfaden 10, 11 zur Erzielung einer Druckentlastung bzw. eines Druckausgleichs an. In der Figur 3 ist die Gasströmungsrichtung beim Notbetanken des Brenngastanks 2 über das aktiv geöffnete Absperrventil 6 und die Gasströmungspfade 10, 11 durch einen Pfeil 19 gekennzeichnet. In Figure 2, arrow 17 indicates the refueling direction in which the fuel gas flows into the fuel gas tank 2 via the refueling path 5 when refueling the fuel gas tank 2. Arrow 18 indicates the removal direction in which the fuel gas flows when removing fuel gas from the fuel gas tank 2. Arrows 27 and 28 in turn indicate the gas flow direction in the other gas flow paths 10, 11 to achieve pressure relief or pressure equalization. In Figure 3, the gas flow direction during emergency refueling of the fuel gas tank 2 via the actively opened shut-off valve 6 and the gas flow paths 10, 11 is indicated by an arrow 19.
Um eine möglichst kompakt bauende Ventilbaugruppe 1 zu schaffen, können die beiden gegengleich öffnenden und über ihre jeweilige Abströmseite verbundenen Rückschlagventile 12 und 15, zu einem Bauelement 20 zusammengefasst werden. Mögliche Ausführungsformen sind in den Figuren 4 bis 7 dargestellt. In order to create a valve assembly 1 that is as compact as possible, the two check valves 12 and 15, which open in opposite directions and are connected via their respective downstream sides, can be combined to form a component 20. Possible embodiments are shown in Figures 4 to 7.
Eine erste bevorzugte Ausführungsform eines Bauelements 20 zeigt die Figur 4. Hier weist das Bauelement 20 zwei Ventilschließelemente 23.1, 23.2 auf, wobei jedes Ventilschließelement 23.1, 23.2 über eine zwischenliegende, gemeinsame Feder 24 jeweils in Richtung eines zugehörigen Ventilsitzes 21, 22 vorgespannt ist. Die Feder 24 ist in einem Ventilraum 29 aufgenommen, der das Bauelement 20 mit der Zuströmseite des Absperrventils 6 bzw. mit dem zuströmseitigen Abschnitt 4.1 des Entnahmepfads 4 verbindet. Bei der Entnahme von Brenngas aus dem Brenngastank 2 öffnet das Rückschlagventil 12 entgegen der Federkraft der Feder 24, während das Ventilschließelement 23.2 gegen den Ventilsitz 22 gedrückt wird und das Rückschlagventil 15 verschließt. Bei einem Druckausgleich über den Gasströmungspfad 11 oder beim Notbetanken öffnet das Rückschlagventil 15 mit dem Ventilschließelement 23.2 entgegen der Federkraft der Feder 24, während das Ventilschließelement 23.1 gegen den Ventilsitz 21 gedrückt wird und das Rückschlagventil 12 verschließt. A first preferred embodiment of a component 20 is shown in Figure 4. Here, the component 20 has two valve closing elements 23.1, 23.2, wherein each valve closing element 23.1, 23.2 is prestressed in the direction of an associated valve seat 21, 22 via an intermediate, common spring 24. The spring 24 is accommodated in a valve chamber 29, which connects the component 20 to the inflow side of the shut-off valve 6 or to the inflow-side section 4.1 of the extraction path 4. When fuel gas is extracted from the fuel gas tank 2, the check valve 12 opens against the spring force of the spring 24, while the valve closing element 23.2 is pressed against the valve seat 22 and closes the check valve 15. In the event of pressure equalization via the gas flow path 11 or during emergency refueling, the check valve 15 opens with the valve closing element 23.2 against the spring force of the spring 24, while the valve closing element 23.1 is pressed against the valve seat 21 and closes the check valve 12.
Eine weitere bevorzugte Ausführungsform eines Bauelements 20 ist in den Figuren 5 bis 7 dargestellt. Hier ist das Ventilschließelement 23 einteilig ausgeführt und wird allein über den Druck, das heißt pneumatisch gesteuert, so dass eine Feder 24 entbehrlich ist. Das Ventilschließelement 23 weist hierzu eine Umfangsnut 25 auf, über die der Ventilraum 29 an die Zuströmseite des Absperrventils 6 bzw. an den zuströmseitigen Abschnitt 4.1 des Entnahmepfads 4 angebunden ist. Another preferred embodiment of a component 20 is shown in Figures 5 to 7. Here, the valve closing element 23 is designed in one piece and is controlled solely by pressure, i.e. pneumatically, so that a spring 24 is not required. For this purpose, the valve closing element 23 has a circumferential groove 25, via which the valve chamber 29 is connected to the inflow side of the shut-off valve 6 or to the inflow-side section 4.1 of the extraction path 4.
Da das Ventilschließelement 23 radial geführt ist, weist es auf jeder Seite der Umfangsnut 25 zudem mindestens eine in die Umfangsnut 25 mündende Längsnut 26 als Gasströmungskanal auf (siehe Figur 6). Bei geöffnetem Ventilsitz 21 strömt das Gas von dort über die mindestens eine Längsnut 26 zwischen der Umfangsnut 25 und dem dem Ventilsitz 21 zugewandten Ende der Führung des Ventilschließelements 23 zum Ventilraum 29. Bei geöffnetem Ventilsitz 22 strömt das Gas von dort über die mindestens eine Längsnut 26 zwischen der Umfangsnut 25 und dem dem Ventilsitz 22 zugewandten Ende der Führung des Ventilschließelements 23 zum Ventilraum 29. Since the valve closing element 23 is guided radially, it also has at least one longitudinal groove 26 on each side of the circumferential groove 25, which opens into the circumferential groove 25 and serves as a gas flow channel (see Figure 6). When the valve seat 21 is open, the gas flows from there via the at least one longitudinal groove 26 between the circumferential groove 25 and the end of the guide of the valve closing element 23 facing the valve seat 21 to the valve chamber 29. When the valve seat 22 is open, the gas flows from there via the at least one longitudinal groove 26 between the circumferential groove 25 and the end of the guide of the valve closing element 23 facing the valve seat 22 to the valve chamber 29.
Figur 5 zeigt das Ventilschließelement 23 in einer Schaltstellung, die dieses einnimmt, wenn P2 > pi ist. Über das geöffnete Rückschlagventil 15 kann dann ein Druckausgleich bewirkt werden, der ein ungewolltes Öffnen des Absperrventils 6 verhindert. Beim Notbetanken nimmt das Ventilschließelement 23 ebenfalls die in der Figur 5 dargestellte Schaltstellung ein. Das Rückschlagventil 12 ist in dieser Schaltstellung geschlossen. Figure 5 shows the valve closing element 23 in a switching position which it assumes when P2 > pi. Pressure equalization can then be achieved via the open check valve 15, which prevents the shut-off valve 6 from opening accidentally. During emergency refueling, the valve closing element 23 also assumes the switching position shown in Figure 5. The check valve 12 is closed in this switching position.
Figur 7 zeigt das Ventilschließelement 23 in einer Schaltstellung, die dieses einnimmt, wenn P2 < pi und das Absperrventil 6 aktiv geöffnet ist. Über das geöffnete Rückschlagventil 12, das geöffnete Absperrventil 6 und das ebenfalls geöffnete Rückschlagventil 13 kann dann Brenngas aus dem Brenngastank 2 entnommen und zum Gasanschluss 8 geführt werden. Das Rückschlagventil 15 ist in dieser Schaltstellung geschlossen. Figure 7 shows the valve closing element 23 in a switching position which it assumes when P2 < pi and the shut-off valve 6 is actively opened. Fuel gas can then be removed from the fuel gas tank 2 and led to the gas connection 8 via the open check valve 12, the open shut-off valve 6 and the also open check valve 13. The check valve 15 is closed in this switching position.
Eine erfindungsgemäße Ventilbaugruppe kann neben den dargestellten Ventilen weitere Ventile und/oder Komponenten aufweisen. Zum Beispiel kann bzw. können ein manuelles Absperr- und/oder Abblasventil, ein thermisches und/oder druckgesteuertes Sicherheitsventil sowie ein Temperatur- und/oder Drucksensor in die Ventilbaugruppe integriert sein. A valve assembly according to the invention can have additional valves and/or components in addition to the valves shown. For example, a manual shut-off and/or blow-off valve, a thermal and/or pressure-controlled safety valve and a temperature and/or pressure sensor can be integrated into the valve assembly.

Claims

Ansprüche Expectations
1. Ventilbaugruppe (1) für einen Brenngastank (2), umfassend einen Grundkörper (3), in dem ein Entnahmepfad (4) mit integriertem Absperrventil (6) zur Entnahme von Brenngas aus dem Brenngastank (2) sowie ein Betankungspfad (5) mit integriertem Rückschlagventil (7) zum Betanken des Brenngastanks (2) mit Brenngas ausgebildet sind, wobei der Entnahmepfad (4) und der Betankungspfad (5) innerhalb des Grundkörpers (3) in einem Pfad (9) zusammengeführt sind, der in einen gemeinsamen Gasanschluss (8) mündet, dadurch gekennzeichnet, dass im Grundkörper (3) mindestens zwei weitere Gasströmungspfade (10, 11) ausgebildet sind, die jeweils unter Umgehung des Absperrventils (6) einen in Entnahmerichtung stromabwärts des Absperrventils (6) angeordneten, abströmseitigen Abschnitt (4.2) des Entnahmepfads (4) mit einem stromaufwärts des Absperrventils (6) angeordneten, zuströmseitigen Abschnitt (4.1) des Entnahmepfads (4) und/oder mit einem im Brenngastank (2) ausgebildeten Speichervolumen verbinden, wobei die Strömungsrichtung im Entnahmepfad (4) durch ein im zuströmseitigen Abschnitt (4.1) angeordnetes erstes Rückschlagventil (12) sowie ein im abströmseitigen Abschnitt (4.2) angeordnetes zweites Rückschlagventil (13) vorgegeben und die Durchströmung der zwei weiteren Gasströmungspfade (10, 11) in Entnahmerichtung durch jeweils ein Rückschlagventil (14, 15) gesperrt ist. 1. Valve assembly (1) for a fuel gas tank (2), comprising a base body (3) in which a withdrawal path (4) with an integrated shut-off valve (6) for withdrawing fuel gas from the fuel gas tank (2) and a refueling path (5) with an integrated check valve (7) for refueling the fuel gas tank (2) with fuel gas are formed, wherein the withdrawal path (4) and the refueling path (5) are combined within the base body (3) in a path (9) which opens into a common gas connection (8), characterized in that at least two further gas flow paths (10, 11) are formed in the base body (3), each of which, bypassing the shut-off valve (6), connects a downstream section (4.2) of the withdrawal path (4) arranged downstream of the shut-off valve (6) in the withdrawal direction with an inflow section (4.1) arranged upstream of the shut-off valve (6). of the extraction path (4) and/or with a storage volume formed in the fuel gas tank (2), wherein the flow direction in the extraction path (4) is predetermined by a first check valve (12) arranged in the inflow-side section (4.1) and a second check valve (13) arranged in the outflow-side section (4.2), and the flow through the two further gas flow paths (10, 11) in the extraction direction is blocked by a check valve (14, 15) in each case.
2. Ventilbaugruppe (1) nach Anspruch 1, dadurch gekennzeichnet, dass ein erster Gasströmungspfad (10) stromaufwärts des in den abströmseitigen Abschnitt (4.2) integrierten Rückschlagventils (13) vom Entnahmepfad (4) abzweigt und stromaufwärts des in den zuströmseitigen Abschnitt (4.1) integrierten Rückschlagventils (12) in den Entnahmepfad (4) oder direkt in das Speichervolumen des Brenngastanks (2) mündet. 2. Valve assembly (1) according to claim 1, characterized in that a first gas flow path (10) branches off from the extraction path (4) upstream of the check valve (13) integrated in the downstream section (4.2) and opens into the extraction path (4) or directly into the storage volume of the fuel gas tank (2) upstream of the check valve (12) integrated in the upstream section (4.1).
3. Ventilbaugruppe (1) nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass ein zweiter Gasströmungspfad (11) stromabwärts des in den abströmseitigen Abschnitt (4.2) integrierten Rückschlagventils (13) vom Entnahmepfad (4) abzweigt und stromabwärts des in den zuströmseitigen Abschnitt (4.1) integrierten Rückschlagventils (12) in den Entnahmepfad (4) mündet. 3. Valve assembly (1) according to claim 1 or 2, characterized in that a second gas flow path (11) branches off from the extraction path (4) downstream of the check valve (13) integrated in the downstream section (4.2) and opens into the extraction path (4) downstream of the check valve (12) integrated in the upstream section (4.1).
4. Ventilbaugruppe (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass zwei gegengleich öffnende Rückschlagventile (12, 15) zu einem Bauelement (20) zusammengefasst sind. 4. Valve assembly (1) according to one of the preceding claims, characterized in that two check valves (12, 15) opening in opposite directions are combined to form one component (20).
5. Ventilbaugruppe (1) nach Anspruch 4, dadurch gekennzeichnet, dass das Bauelement (20) zwei Ventilschließelemente (23.1, 23.2) aufweist, zwischen denen eine Feder (24) angeordnet ist, durch die jedes Ventilschließelement (23.1, 23.2) in Richtung eines Ventilsitzes (21, 22) vorgespannt ist. 5. Valve assembly (1) according to claim 4, characterized in that the component (20) has two valve closing elements (23.1, 23.2), between which a spring (24) is arranged, by which each valve closing element (23.1, 23.2) is prestressed in the direction of a valve seat (21, 22).
6. Ventilbaugruppe (1) nach Anspruch 4, dadurch gekennzeichnet, dass das Bauelement (20) ein einteilig ausgeführtes, zwischen zwei Ventilsitzen (21, 22) hin und her bewegliches Ventilschließelement (23) mit einer Umfangsnut (25) und Längsnuten (26) aufweist. 6. Valve assembly (1) according to claim 4, characterized in that the component (20) has a one-piece valve closing element (23) which can be moved back and forth between two valve seats (21, 22) and has a circumferential groove (25) and longitudinal grooves (26).
7. Ventilbaugruppe (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Absperrventil (6) elektrisch ansteuerbar ist und/oder als stromlos geschlossenes Ventil ausgeführt ist. 7. Valve assembly (1) according to one of the preceding claims, characterized in that the shut-off valve (6) is electrically controllable and/or is designed as a normally closed valve.
8. Ventilbaugruppe (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der gemeinsame Gasanschluss (8) als Anschlussstutzen, vorzugsweise als Anschlussstutzen mit einem Außengewinde, ausgeführt ist. 8. Valve assembly (1) according to one of the preceding claims, characterized in that the common gas connection (8) is designed as a connection piece, preferably as a connection piece with an external thread.
9. Ventilbaugruppe (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Grundkörper (3) einen Verbindungsabschnitt (16) zur Verbindung mit dem Brenngastank (2) aufweist. 9. Valve assembly (1) according to one of the preceding claims, characterized in that the base body (3) has a connecting portion (16) for connection to the fuel gas tank (2).
10. Brenngastank (2) mit einer Ventilbaugruppe (1) nach einem der vorhergehenden Ansprüche, wobei vorzugsweise die Ventilbaugruppe (1) abschnittsweise in den Brenngastank (2) eingesetzt ist, so dass der gemeinsame Gasanschluss (8) von außen zugänglich ist. 10. Fuel gas tank (2) with a valve assembly (1) according to one of the preceding claims, wherein the valve assembly (1) is preferably inserted in sections into the fuel gas tank (2) so that the common gas connection (8) is accessible from the outside.
PCT/EP2023/078010 2022-11-07 2023-10-10 Valve assembly for a fuel gas tank, fuel gas tank comprising a valve assembly WO2024099662A1 (en)

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DE102022211715.8A DE102022211715A1 (en) 2022-11-07 2022-11-07 Valve assembly for a fuel gas tank, fuel gas tank with valve assembly

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Citations (5)

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DE102016008059A1 (en) * 2015-11-24 2017-05-24 Daimler Ag tank valve
DE102016008107A1 (en) * 2016-07-01 2018-01-04 Daimler Ag tank valve
DE102016008442A1 (en) * 2016-07-01 2018-01-04 Daimler Ag tank valve
DE102016008079A1 (en) * 2016-07-01 2018-01-04 Daimler Ag tank valve
DE102017004261A1 (en) * 2017-05-03 2018-11-08 Daimler Ag gas valve

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DE102010062658A1 (en) 2010-12-08 2012-06-14 Robert Bosch Gmbh Fuel supply system, particularly for gas-powered motor vehicle, comprises tank and valve for selectively opening and closing tank, and bypass line is provided, which is connected in parallel to valve
DE102016008058A1 (en) 2016-07-01 2018-01-04 Daimler Ag tank valve
DE102017213521A1 (en) 2017-08-03 2019-02-07 Bayerische Motoren Werke Aktiengesellschaft Valve device for a storage tank
DE102020108176A1 (en) 2020-03-25 2021-09-30 Bayerische Motoren Werke Aktiengesellschaft Fuel supply system and motor vehicle

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DE102016008059A1 (en) * 2015-11-24 2017-05-24 Daimler Ag tank valve
DE102016008107A1 (en) * 2016-07-01 2018-01-04 Daimler Ag tank valve
DE102016008442A1 (en) * 2016-07-01 2018-01-04 Daimler Ag tank valve
DE102016008079A1 (en) * 2016-07-01 2018-01-04 Daimler Ag tank valve
DE102017004261A1 (en) * 2017-05-03 2018-11-08 Daimler Ag gas valve

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