DE102017213526A1 - Pressure vessel system with several pressure vessels and a pressure transducer - Google Patents

Abstract

A pressure vessel system 100 is described which comprises at least two pressure vessels 110, 120 for storing a fuel 320. The pressure vessel system 100 further includes a pressure transducer 102 configured to convert a pressure of fuel 320 on a common supply flow path 402. In addition, the pressure vessel system 100 comprises at least two separate extraction lines 113, 123 which connect the at least two pressure vessels 110, 120 respectively to the pressure transducer 102. The separate withdrawal lines 113, 123 open into the common supply flow path 402, the mouth into the common supply flow path 402 in close proximity to or in the pressure transducer 102.

Description

The technology described in this document relates to a pressure vessel system with multiple pressure vessels, e.g. for a motor vehicle. Furthermore, the described technology relates to a valve device for a pressure vessel of such a pressure vessel system.

A road vehicle may comprise a fuel cell based on a fuel such as a fuel. Hydrogen generates electrical energy for operation, in particular for the drive, of the vehicle. The fuel can be stored in one or more pressure vessels or pressure tanks of the vehicle. The fuel may be passed from a pressure vessel via a fuel line to the fuel cell of the vehicle. A pressure vessel may be disposed on the underbody or in the underbody of a vehicle.

A pressure vessel system with a plurality of pressure vessels is usually fueled via a refueling access or tank nipple with fuel. Thereafter, the fuel from the refueling space on the body (i.d.R., Covered by a fuel filler flap) is fed via a refueling line to a refueling port remote from the refueling port, from which the fuel is supplied to the different pressure vessels. The distribution block may be arranged, for example, adjacent to a plurality of pressure vessels.

It may be e.g. form different pressures in the different pressure vessels due to thermal influences and / or due to other reasons. When restarting a pressure vessel system thus pressure differences between the different pressure vessels of the pressure vessel system can exist. As part of a restart typically the valves of the individual pressure vessels are opened to lead fuel from the pressure vessels to a fuel cell of the pressure vessel system. In the presence of pressure differences between the pressure vessels, the opening of the valves can lead to a sudden pressure equalization. This can lead to relatively loud flow noise. Furthermore, due to the relatively high pressure equalization flow, the (mechanical) burst breaker in the valve of a pressure vessel may erroneously detect a break in the fuel line and then close the valve.

It is a preferred object of the technology disclosed herein to reduce or eliminate at least one disadvantage of a previously known solution or to suggest an alternative solution. It is a preferred object of the technology disclosed herein to provide reliable, safe and convenient pressure equalization in a multiple pressure vessel pressure vessel system. Furthermore, a preferred object of the technology disclosed herein is to enable efficient and reliable refueling of a multiple pressure vessel pressure vessel system. In addition, a preferred object of the technology disclosed herein is to enable efficient and reliable removal of fuel from the pressure vessels of a multiple pressure vessel pressure vessel system.

The object (s) is / are solved by the subject matter of the independent claims. The dependent claims are preferred embodiments.

In one aspect, a valve apparatus for a pressure vessel for storing a fluid is described. The fluid may be gaseous and / or liquid. The fluid may include a fuel for a fuel consumer. In particular, the fluid can comprise or be hydrogen, in particular H2. The pressure vessel is designed to store the fluid or the fuel at a pressure which exceeds an ambient pressure of the pressure vessel. For example, the pressure of the fluid at 300 barü, 700 barü or more above the ambient pressure. The valve device may be designed to be screwed via a thread into an opening of the pressure vessel.

The valve device can in particular open or close the opening of the pressure vessel as required.

A valve device described in this document is expediently designed as an on-tank valve. In other words, the aspects of a valve device described in this document may be implemented as an on-tank valve. In particular, the valve device can be inserted into an opening of a pressure vessel, e.g. screwed, be. In this case, the valve device may include the function of a shut-off valve, wherein a shut-off valve is arranged to prevent in particular the removal of fluid or fuel from a pressure vessel (when the shut-off valve is closed) or to allow (by the shut-off valve is opened).

The valve device comprises at least one inflow channel with an inflow interface, which is designed to be connected to a supply line (for example with a supply pipe or feed hose) in order to supply fluid or fuel to the pressure container. If necessary, the supply line can be composed of several individual lines or off consist of an overall management. Furthermore, one or more further components may be provided in the supply line. The supply line can be connected to a refueling access (eg with a tank nipple) of the pressure vessel system, for example. Thus, fluid can be fed from the refueling access via the supply line and via the inflow interface in the pressure vessel.

In addition, the valve device includes at least one outflow channel separated from the inflow channel with a drainage interface configured to be connected to a withdrawal line (e.g., a withdrawal tube or a withdrawal line tube) to withdraw fluid from the pressure vessel. The extraction line may e.g. be connected to a fuel consumer, which is operated with the fluid or fuel.

The valve device thus comprises separate channels for the supply and for the discharge of fluid into and out of the pressure vessel. Thus, a reliable refueling of the pressure vessel and / or a reliable supply of a fuel consumer can be ensured, in particular in a pressure vessel system with a plurality of pressure vessels.

The valve device further comprises a coupling point at which the inflow channel and the outflow channel are connected to each other. Furthermore, the coupling point may be connected to a common channel, wherein the common channel leads from the coupling point into the interior of the pressure vessel when the valve device is mounted on a pressure vessel. In other words, the valve device is typically arranged to establish fluid communication between a pressure vessel and the coupling point (e.g., via the common channel, which expediently flows into the interior of the pressure vessel or into the pressure vessel boss).

With the supply of fluid can thus flow from the inflow interface via the inflow channel to the coupling point and from there via the common channel in the interior of the pressure vessel. On the other hand, during the removal of fluid, fluid can flow from the interior of the pressure vessel via the common channel to the coupling point and from there via the outflow channel to the outflow interface. The common channel can be designed for a mass and / or volume flow which corresponds to a forward value of the mass and / or volume flow of the inflow channel and / or the outflow channel. The forward value of the mass and / or volumetric flow can in particular define the maximum possible mass and / or volumetric flow in the respective forward direction of the inflow channel or the outflow channel. In this case, the forward direction of the inflow channel is the direction from the inflow interface to the coupling point. On the other hand, the forward direction of the drainage channel is the direction from the coupling point to the drainage interface. Thus, the forward value of the mass and / or volumetric flow of the inflow channel may correspond to the maximum possible mass and / or volumetric flow during refueling in the flow direction from the inflow interface to the coupling point. Furthermore, the forward value of the mass and / or volume flow of the discharge channel can correspond to the maximum possible mass and / or volume flow during removal in the direction of flow from the coupling point to the discharge interface.

By using a common channel that leads into the interior of a pressure vessel (when the valve device is mounted on a pressure vessel), the installation space, the weight and the cost of the valve device can be reduced.

In addition, the valve device typically includes an electrically operable valve, in particular disposed on the common channel, configured to close or open the common channel to inhibit or permit the flow of fluid in the common channel , By means of a closed, electrically operable valve, it is possible, in particular, to ensure that no fluid can flow out of the pressure vessel into the outflow channel. The electrically operable valve may be configured to be closed in an idle state and opened in response to a control signal. The valve device may include a data interface (e.g., in the form of a socket or plug) through which a control signal for the electrically actuatable valve may be received. The electrically operable valve may be formed as an electromagnetic valve.

In addition, the valve device may comprise at least one flow restriction unit configured to limit a backward flow of fluid in the inflow channel and / or in the outflow channel. In particular, the valve device may include a flow restriction unit disposed on the inflow passage and configured to restrict a backward flow of fluid from the coupling point to the inflow interface. Alternatively or additionally, the valve device may comprise a flow-limiting unit arranged on the outflow channel, which is set up to limit a backward flow of fluid from the outflow interface to the coupling point. The backward flow thus corresponds to a flow of fluid in a backward direction, the the forward direction of the respective channel is opposite.

By providing a flow-limiting unit, undesirably high volume and / or mass flows into or out of a pressure vessel can be avoided. Thus, the reliability, comfort (in particular by reducing flow noise) and the safety of a pressure vessel system, in particular a pressure vessel system with multiple pressure vessels, can be increased.

A flow restricting unit may be configured to limit the backward flow of fluid on the inflow channel or on the outflow channel to a lower value than a flow of fluid in the respective forward direction on the inflow channel or on the outflow channel. Furthermore, a flow-limiting unit can be set up to automatically limit the backward flow of fluid on the inflow channel or on the outflow channel, in particular without requiring the supply of (electrical) energy and / or a control signal. Thus, a reliable limitation of an undesirably high mass and / or volume flow into or out of the pressure vessel can be made possible.

As already explained above, the inflow channel and the outflow channel can each be designed to allow a forward value of volume and / or mass flow of the fluid in the respective forward direction. On the other hand, a flow restriction unit may be configured to limit the backflow of fluid in the respective backward direction of the inflow channel or the outflow channel to a reverse value of volume and / or mass flow of the fluid. In this case, the reverse value is preferably smaller than the forward value. In particular, the backward value may be smaller than the forward value by 10%, 20%, 40%, 50%, 80%, 90%, 99% or more. Thus, a reliable limitation of the mass and / or volume flow through the valve device in a reverse direction can be effected without affecting the inflow or outflow of fluid in the forward direction.

The backward value of volume and / or mass flow set by a flow restriction unit may be substantially zero. For example, the backward value may be around the factor 10 . 20 . 50 . 100 . 1000 or more smaller than the forward value on the respective channel. In particular, the flow restricting unit may include a check valve configured to inhibit the reverse flow of fluid in the reverse direction. Thus, backward flow through the inflow channel and / or the outflow channel can be effectively suppressed.

On the other hand, the reverse value of volume and / or mass flow set by a flow restriction unit may be greater than zero. For example, the backward value may be greater than 0.01 or greater than 0.1 times the forward value. In this case, the flow-limiting unit may comprise a throttle which is designed to limit the volume and / or mass flow of the fluid differently in different flow directions. Thus, a limited backward flow can be efficiently enabled, e.g. to effect a pressure equalization between different pressure vessels of a pressure vessel system. On the other hand, a relatively high volume and / or mass flow can be made possible for the recipient (via the inflow channel) or for de-tanking or removal (via the outflow channel).

The valve device may include an inflow channel disposed on the inflow channel configured to filter fluid flowing through the inflow channel. So contaminants of a pressure vessel can be reliably reduced or avoided altogether.

Alternatively or additionally, the valve device can comprise a manual valve, in particular arranged on the common channel, which can be manually closed or opened. The manual valve may be configured to enable or inhibit the flow of fluid on the common channel. Thus, if necessary, a pressure vessel may be excluded from, or incorporated into, the operation of a pressure vessel system (e.g., for testing purposes).

Alternatively or additionally, the valve device may include a pressure relief unit (eg, a pressure release device, PRD), which is set to trigger in the presence of a trigger condition (eg, a trip temperature) to drain fluid from the pressure vessel into an environment of the pressure vessel. Thus, a bursting of a pressure vessel can be reliably avoided in the event of a fault. If, due to a malfunction of another component and / or due to an external thermal and / or mechanical action (eg accident, local flame, etc.), an accident occurs, the pressure relief unit is set up to control the pressure in the pressure vessel system, in particular in the at least one pressure vessel , to reduce. The pressure relief unit may be suitably arranged to allow for pressure relief of the pressure vessel a fuel extraction mass flow, the greater (eg at least by a factor 1.5 . 2 . 5 . 10 . 100 or more higher) than the maximum fuel extraction mass flow through the extraction line to at least one energy converter or fuel consumer (usually a Fuel cell). The at least one pressure relief device is usually not used for the filling of the pressure vessel system and / or for the removal of fuel to provide energy in the motor vehicle during operation without incident. Normally, the pressure vessel pressure is lowered by the pressure relief to atmospheric pressure.

In another aspect, a pressure vessel system is described. The pressure vessel system may e.g. be used in a motor vehicle. The pressure vessel system comprises a first pressure vessel and a second pressure vessel, each for storing a fluid (in particular a fuel). The pressure vessel system may also have more than two pressure vessels. The inflow and outflow of fluid is made possible in each case via a valve device of the respective pressure vessel. In other words, the first pressure vessel has a first valve device and the second pressure vessel has a second valve device. The pressure vessel system may further include one or more pressure vessels having another one or more valve devices.

It is thus described a pressure vessel system for a motor vehicle. The pressure vessel system is used to store under ambient conditions gaseous fuel or fuel. The pressure vessel system can be used for example in a motor vehicle which is operated with compressed natural gas (CNG) or liquefied (LNG) natural gas or with hydrogen (H ₂ ).

Such a pressure vessel system comprises at least one pressure vessel or pressure tank. The pressure vessel may be, for example, a cryogenic pressure vessel (= CcH2) or a high-pressure gas vessel (= CGH2).

High pressure gas containers are configured to store fuel substantially at ambient temperatures at a nominal operating pressure (also called nominal working pressure or NWP) of about 350 bar (= overpressure to atmospheric pressure), more preferably about 700 barg or more. A cryogenic pressure vessel is suitable to store the fuel at the aforementioned operating pressures even at temperatures well below the operating temperature of the motor vehicle.

In addition, the pressure vessel system typically includes refueling access via which fluid may be provided to the pressure vessel system, particularly to the first and second pressure vessels. Furthermore, the pressure vessel system usually comprises a first supply line, which connects the refueling access to the first valve device of the first pressure vessel. In addition, the pressure vessel system usually comprises a second supply line which connects the refueling access to the second valve device of the second pressure vessel.

At least one of the valve devices, i. at least one of the first and second valve devices may be configured as described in this document. Thus, a reliable and secure pressure equalization between the pressure vessels of the pressure vessel system can be effected. In particular, at least one of the valve devices can have a flow restriction unit on an inflow channel in order to allow a reliable pressure equalization via the supply lines.

The pressure vessel system may further include a fuel consumer configured to generate electrical energy based on the fluid or fuel. In addition, the pressure vessel system may include a first extraction line connecting the valve device of the first pressure vessel with the fuel consumer. Furthermore, the pressure vessel system may include a second extraction line connecting the valve device of the second pressure vessel with the fuel consumer. At least one of the valve devices may include a flow restriction unit on a drain channel to allow reliable pressure equalization across the extraction lines.

In another aspect, a pressure vessel system is described that includes at least two pressure vessels for storing a fuel. The embodiment with respect to a pressure vessel, with respect to a valve device for a pressure vessel and / or with respect to a pressure vessel system also apply to the pressure vessel system described below. In particular, each of the pressure vessels may include a valve device disposed in a respective opening of a pressure vessel to control the inflow and / or outflow of fuel.

The pressure vessel system includes a refueling port through which fuel for the pressure vessel system may be provided in a common refueling flowpath. The refueling access may include a refueling interface, particularly a clutch, which may be coupled to a corresponding one of a tap and a fuel dispenser to provide fuel in the pressure vessel system. The refueling interface can also be called a receptacle. The two or more pressure vessels may communicate via the common refueling flowpath, typically of the one Refueling access goes out, fueled with fuel.

The pressure vessel system further comprises at least two separate supply lines which connect the at least two pressure vessels respectively to the refueling access. In particular, a first pressure vessel via a first supply line and a second pressure vessel via a separate second supply line may be connected to the refueling access.

In doing so, the separate inlets (at at least one branch) branch off the common refueling flowpath, the diversion being from the common refueling flowpath immediately adjacent to or in the refueling access. The branching of the separate supply lines can take place at a common branch point. Alternatively or additionally, the diversion of the separate supply lines may be on a limited distance of the common refueling flowpath, the common refueling flowpath preferably having a length of less than 50cm or 30cm or 20cm or 10cm or less.

By splitting the fuel provided at the refueling access into separate supply lines, which takes place as close as possible to the refueling access, pressure conditions during the refueling of the different pressure vessels can be improved. In particular, the mass flow per line can be reduced as early as possible. Furthermore, this can reduce the printer's desire to refuel. Furthermore, the reliability of the refueling of the different pressure vessels of a pressure vessel system can thus be improved. Furthermore, by integrating the Receptacle split number of components, fasteners, costs and weight can be achieved in a smaller space.

The diversion of the separate supply lines for the different pressure vessels of a pressure vessel system can thus take place as close as possible to the point at which fuel is transferred to the motor vehicle / pressure vessel system, ie as close as possible to the refueling access. The common line length of the common refueling flowpath from the refueling access (at which the fuel is provided) to the branch is preferably less than the supply line lengths of the individual supply lines from the branch to the respective pressure vessel, in particular smaller than the supply line lengths of each the supply lines. Preferably, the common line length is by a factor 2 . 5 . 10 . 20 . 50 . 100 or more smaller than each of the feeder line lengths. Thus, a particularly reliable refueling of the pressure vessel of a pressure vessel system can be made possible. Particularly preferably, the separate supply lines branch off at or in the refueling access or its housing from the common refueling flow path.

The branch may be located so close to the refueling access that pressure losses in the common refueling flowpath from the refueling interface to the branch are negligibly small. Alternatively or additionally, the common refueling flowpath from the refueling access to the branch may be configured such that a pressure drop of fuel on the common refueling flowpath is smaller, in particular by a factor 2 . 5 . 10 . 20 . 50 . 100 or more smaller than a pressure drop on the separate supply lines from the branch to the respective pressure vessel. Thus, the pressure ratios for refueling the different pressure vessels can be adapted to a particularly large extent dedicated for each individual pressure vessel, whereby the reliability of refueling a pressure vessel system with multiple pressure vessels can be increased.

The refueling access may comprise a housing in which e.g. the refueling interface is arranged. The diversion from the common refueling flowpath may then be in or on the refueling access housing or in close proximity to the refueling access housing.

For example, the branch can be made directly on an outer side of a housing wall of the housing of the refueling access. In particular, the branching can take place within a branch unit with a (possibly separate) housing which directly adjoins the housing wall of the housing of the refueling access. For example, a Y- or T-shaped branch unit may be provided to branch off two separate supply lines from the common refueling flow path.

As already stated above, refueling access typically includes a refueling interface, in particular a clutch, to a dispensing device. The diversion from the common refueling flowpath may be in close proximity to the fueling refueling interface. Preferably, the branching takes place directly in a common housing, in or on which both the refueling interface and access interfaces for the two or more separate supply lines are arranged. Thus, a weight, space and cost-efficient pressure tank system can be provided with multiple pressure vessels. Furthermore, so Pressure losses on the supply lines can be reduced in a particularly efficient manner in order to increase the reliability of the refueling of the individual pressure vessels.

In another aspect, refueling access for a pressure vessel system is described. The pressure vessel system may be designed as described in this document.

The refueling access includes a refueling interface (also referred to as a receptacle) configured to be coupled to a corresponding interface of a dispensing device for receiving fuel from the dispensing device on a common refueling flowpath. In addition, refueling access includes two or more feeder interfaces. In particular, the refueling access includes a first supply interface adapted to be coupled to a first supply line to a first pressure vessel of the pressure vessel system and a second supply interface arranged to be coupled to a second supply line to a second pressure vessel of the pressure vessel system to become.

The refueling port further includes a branch unit in which the separate supply ports or separate lines branch off to the separate supply ports from the common refueling flow path.

In this case, the branch unit is preferably arranged in the immediate vicinity of the refueling interface. Preferably, the branch unit, and in particular a point of the branch, may be located 50cm, 40cm, 30cm, 20cm, 10cm or less away from the refueling interface.

The refueling access described in this document allows for weight, space and cost efficient (parallel and / or sequential) refueling from multiple pressure vessels. Furthermore, by dividing the fluid streams into different feed lines for different pressure vessels directly at the refueling access, pressure losses during the refueling of the pressure vessels of a pressure vessel system can be reduced, whereby the reliability of a refueling process is increased.

The fueling access may preferably be formed as a unit, e.g. is completed by a single, common housing and / or is formed. The refueling interface may be disposed on a first side of the housing to be coupled to a corresponding interface of a refueling device (particularly a fuel pump) to receive fluid (particularly fuel) from the refueling device. For example, a hose of a fuel pump can be connected to the refueling interface.

In addition, the lead interfaces may be disposed in or on the common housing (e.g., on a second side of the housing). It is thus possible to provide a unit, in particular a unit within a common housing, which comprises both a refueling interface and at least two feeder interfaces.

In addition, the branch unit can also be arranged in the common housing. In this case, the branch unit can have a channel network, possibly arranged in the housing, which is set up to connect the refueling interface to the first and the second supply line interface, so that fluid which flows into the refueling access via the refueling interface the first and the second supply line interface (and possibly on other supply interfaces for further pressure vessels) is divided. For example, the feeder interfaces may be routed in a Y-shaped sewer network to the refueling interface. Thus, a particularly efficient and reliable refueling of a pressure vessel system with multiple pressure vessels is made possible.

In another aspect, a pressure vessel system is described that includes at least two pressure vessels for storing a fuel. The embodiment with respect to a pressure vessel, with respect to a valve device for a pressure vessel and / or with respect to a pressure vessel system also apply to the pressure vessel system described below. In particular, each of the pressure vessels may include a valve device disposed in a respective opening of a pressure vessel to control the inflow and / or outflow of fuel.

The pressure vessel system includes a pressure transducer configured to convert the pressure of fuel on a common supply flowpath. In particular, the pressure transducer may be configured to reduce the pressure so that the pressure upstream of the pressure transducer is higher than downstream. The pressure transducer may include a conversion unit disposed on the common supply flow path and configured to convert (in particular reduce) the pressure of the fuel on the common supply flow path. The output of the pressure transducer or the common supply flow path at the outlet of the pressure transducer may be fuel-conductively connected to a fuel consumer. So it can be made possible, on the one hand with fuel to store a relatively high pressure in the two or more pressure vessels and to use the fuel from the pressure vessels on the other hand with a relatively low pressure in a fuel consumer.

The pressure vessel system further comprises at least two separate extraction lines which connect the at least two pressure vessels respectively to the pressure transducer. In particular, a first extraction line can connect the first pressure vessel and a second extraction line connect the second pressure vessel with the pressure converter in a fuel-conducting manner. The separate withdrawal conduits open into the common supply flow path, the mouth into the common supply flow path being in close proximity to or in the pressure transducer.

The pressure vessel system is thus designed such that fuel from the different pressure vessels as long as possible to the pressure conversion is performed in separate extraction lines. Thus, in a precise and individual way, the pressure conditions in the individual pressure vessels are taken into account, whereby the reliability of the fuel supply of a fuel consumer can be increased. In particular, the mass flow per line can be kept as low as possible over long distances. Thus, a pressure loss during the removal of fuel can be reduced.

A common conduit length of the common supply flow path from the orifice to the pressure transducer is preferably smaller than withdrawal conduit lengths of the withdrawal conduits from the respective pressure vessel to the orifice, in particular smaller than the withdrawal conduit lengths of each of the withdrawal conduits. In particular, the common line length by a factor 2 . 5 . 10 . 20 . 50 . 100 or more smaller than each of the exhaust pipe lengths. This ensures a particularly reliable fuel extraction and fuel supply.

The orifice to the common supply flow channel may be located so close to the pressure transducer that pressure losses in the common supply flow path from the orifice to the pressure transducer are negligibly small. Alternatively or additionally, the common supply flow path from the mouth to the pressure transducer may be designed such that a pressure drop of fuel on the common supply flow path is smaller, in particular by a factor 2 . 5 . 10 . 20 . 50 . 100 or more smaller than a pressure drop on the separate withdrawal lines from the respective pressure vessel to the mouth. This ensures a particularly reliable fuel supply.

The pressure transducer may comprise a housing, e.g. encloses a conversion unit of the pressure transducer. The mouth to the common supply flow path may preferably be in or on the housing of the pressure transducer or in close proximity to the housing of the pressure transducer.

For example, the mouth can be made directly on an outer side of a housing wall of the housing of the pressure transducer. The mouth can be made in particular within a mouth unit with a housing which is directly adjacent to the housing wall of the housing of the pressure transducer. The mouth unit may e.g. allow a T- or Y-shaped mouth of the extraction lines in the common supply flow channel. Thus, fuel can be reliably removed from different pressure vessels of the pressure vessel system and fed to a fuel consumer.

In a preferred example, the pressure transducer comprises a common housing, wherein the pressure conversion of the pressure of fuel within the common housing occurs (e.g., within a conversion unit) and the mouth to the common supply flow path within the common housing (e.g., within a mouth unit). Thus, the space, the weight and the cost of a pressure vessel system can be reduced to a special degree. Furthermore, such an opening can be made possible in the common supply flow path, which is arranged particularly close to the pressure conversion.

In another aspect, a pressure transducer for a pressure vessel system is described. The pressure transducer, ie in particular the pressure reducer, is typically arranged downstream of the at least two pressure vessels and upstream of the at least one fuel consumer. A pressure reducer is designed to reduce the pressure applied to the input of the pressure reducer fuel inlet pressure to a voltage applied to the output of the pressure reducer fuel outlet pressure or back pressure. In the simplest form, this can be a throttle. In general, the pressure reducer includes a pressure reducing valve, which ensures despite different input pressures that on the output side, a certain output pressure is not exceeded. The fuel expands in the pressure reducer. Preference is given to a first pressure reducer (= HPR, high pressure regulator) and downstream of a second pressure reducer (= HSV, eg fuel injector) used.

The pressure transducer may include a first sampling line interface configured to be coupled to a first sampling line coming from a first pressure vessel of the pressure vessel system. Furthermore, the pressure transducer may include a second sampling line interface configured to be coupled to a second sampling line coming from a second pressure vessel of the pressure vessel system.

In addition, the pressure transducer includes a conversion unit configured to convert a pressure of fuel on a common supply flow path from an input pressure at an input of the conversion unit to an output pressure at an output of the conversion unit. Typically, the inlet pressure is higher (eg by the factor 2 . 5 . 10 or more) than the outlet pressure. The inlet pressure may substantially correspond to the pressure in one of the pressure vessels. On the other hand, the output pressure may correspond to an operating pressure of a fuel consumer. The common supply flow path (which is designed, for example, as a line) may be fuel-conductively connected to the fuel consumer at the output of the conversion unit. The conversion unit may comprise at least one throttle, at least one valve and / or one or more pressure regulators.

Furthermore, the pressure transducer may include an orifice unit in which the separate bleed line interfaces open into the common supply flow path. In this case, the extraction line interfaces or the lines from the extraction line interfaces at exactly one point or over a limited distance in the common supply flow path. The distance may preferably have a length of 50cm, 40cm, 30cm, 20cm, 10cm or less.

The mouth unit may be arranged in the immediate vicinity of the input of the conversion unit. Preferably, the orifice unit, and in particular a point of the orifice, may be located 50 cm, 40 cm, 30 cm, 20 cm, 10 cm or less away from the entrance of the conversion unit. Thus it can be achieved that the separate extraction lines from the different pressure vessels of a pressure vessel system are brought together only shortly before the pressure conversion. Thus, the reliability of fuel extraction from different pressure vessels can be increased.

The pressure transducer may include a common housing. The conversion unit, the orifice unit and the extraction line interfaces can then preferably be arranged in and / or on the common housing. Thus, the merging of the extraction lines can be brought particularly close to the pressure conversion.

The mouth unit may include a channel network (e.g., a T or Y-shaped network) disposed within the housing of the pressure transducer configured to connect the input of the conversion unit (and thus the common supply flow path) to the first and second extraction line interfaces.

In another aspect, a road vehicle (particularly a passenger car or a truck or a bus) is described that includes a pressure vessel system described in this document.

It should be understood that the methods, devices and systems described herein may be used alone as well as in combination with other methods, devices and systems described in this document. Furthermore, any aspects of the methods, devices, and systems described herein may be combined in a variety of ways. In particular, the features of the claims can be combined in a variety of ways.

1. 1. Ventil-Vorrichtung 112, 122 für einen Druckbehälter 110, 120 zur Speicherung von Brennstoff 320; wobei die Ventil-Vorrichtung 112, 122 umfasst: einen Zuflusskanal 221 mit einer Zufluss-Schnittstelle 201, die mit mindestens einer Zuleitung 111, 121 verbindbar ist; einen von dem Zuflusskanal 221 getrennten Abflusskanal 223 mit einer Abfluss-Schnittstelle 202, die mit mindestens einer Entnahmeleitung 113, 123 verbindbar ist; einen Kopplungspunkt 216, an dem der Zuflusskanal 221 und der Abflusskanal 223 mit einem gemeinsamen Kanal 222 fluidverbunden sind, wobei der gemeinsame Kanal 222 im montierten Zustand der Ventil-Vorrichtung 112, 122 mit einem Innenraum des Druckbehälters 110, 220 fluidverbunden ist; und zumindest eine Flussbegrenzungseinheit 204, 205, die eingerichtet ist, einen rückwärtigen Fluss von Fluid in dem Zuflusskanal 221 und/oder in dem Abflusskanal 222 zu begrenzen.
2. 2. Ventil-Vorrichtung 112, 122 gemäß Aspekt 1, wobei die Ventil-Vorrichtung 112, 122 eine, insbesondere auf dem Abflusskanal 223 angeordnete, Flussbegrenzungseinheit 205 umfasst, die eingerichtet ist, einen rückwärtigen Fluss von Fluid von der Abfluss-Schnittstelle 203 zu dem Kopplungspunkt 216 zu begrenzen.
3. 3. Ventil-Vorrichtung 112, 122 gemäß einem der vorhergehenden Aspekte, wobei die Ventil-Vorrichtung 112, 122 eine, insbesondere auf dem Zuflusskanal 221 angeordnete, Flussbegrenzungseinheit 204 umfasst, die eingerichtet ist, einen rückwärtigen Fluss von Fluid von dem Kopplungspunkt 216 zu der Zufluss-Schnittstelle 201 zu begrenzen.
4. 4. Ventil-Vorrichtung 112, 122 gemäß einem der vorhergehenden Aspekte, wobei der Zuflusskanal 221 und der Abflusskanal 223 ausgebildet sind, jeweils einen Vorwärtswert an Volumen- und/oder Massenstrom des Fluids in eine jeweilige Vorwärtsrichtung zu ermöglichen; eine Flussbegrenzungseinheit 204, 205 ausgebildet ist, den rückwärtigen Fluss von Fluid in eine jeweilige Rückwärtsrichtung des Zuflusskanals 221 oder des Abflusskanals 223 auf einen Rückwärtswert an Volumen- und/oder Massenstrom des Fluids zu begrenzen; und der Rückwärtswert kleiner als der Vorwärtswert ist.
5. 5. Ventil-Vorrichtung 112, 122 gemäß Aspekt 4, wobei der Rückwärtswert im Wesentlichen null ist; und/oder die Flussbegrenzungseinheit 204, 205 ein Rückschlagventil umfasst, das ausgebildet ist, den rückwärtigen Fluss von Fluid in die Rückwärtsrichtung zu unterbinden.
6. 6. Ventil-Vorrichtung 112, 122 gemäß Aspekt 4, wobei der Rückwärtswert größer als null ist; und/oder die Flussbegrenzungseinheit 204, 205 eine Drossel umfasst, die eingerichtet ist, den Volumen- und/oder Massenstrom des Fluids in unterschiedliche Flussrichtungen unterschiedlich zu begrenzen.
7. 7. Ventil-Vorrichtung 112, 122 gemäß einem der vorhergehenden Aspekte, wobei die Flussbegrenzungseinheit 204, 205 eingerichtet ist, den rückwärtigen Fluss von Fluid auf dem Zuflusskanal 221 oder auf dem Abflusskanal 223 auf einen niedrigeren Wert zu begrenzen als einen Fluss von Fluid in eine Vorwärtsrichtung auf dem Zuflusskanal 221 oder auf dem Abflusskanal 223; und/oder den rückwärtigen Fluss von Fluid auf dem Zuflusskanal 221 oder auf dem Abflusskanal 223 automatisch, insbesondere ohne, dass dafür die Zufuhr von Energie und/oder ein Steuersignal erforderlich sind, zu begrenzen.
8. 8. Ventil-Vorrichtung 112, 122 gemäß einem der vorhergehenden Aspekte, wobei die Ventil-Vorrichtung 112, 122 ein elektrisch betätigbares Ventil 206 umfasst, das ausgebildet ist, den gemeinsamen Kanal 222 zu schließen oder zu öffnen, um den Fluss von Brennstoff 320 in dem gemeinsamen Kanal 222 zu unterbinden oder zu ermöglichen.
9. 9. Ventil-Vorrichtung 112, 122 gemäß Aspekt 8, wobei das elektrisch betätigbare Ventil 206 stromlos geschlossen ist und ausgebildet ist, in Reaktion auf ein Steuersignal geöffnet zu werden; und/oder die Ventil-Vorrichtung 112, 122 ein Zufluss-Filter 202 umfasst, das eingerichtet ist, durch den Zuflusskanal 221 strömendes Fluid zu filtern; und/oder die Ventil-Vorrichtung 112, 122 ein auf dem gemeinsamen Kanal 223 angeordnetes manuelles Ventil 214 umfasst, das manuell geschlossen oder geöffnet werden kann; und/oder die Ventil-Vorrichtung 112, 122 eine Druckentlastungseinheit 209 umfasst, die eingerichtet ist, bei Vorliegen einer Auslösebedingung auszulösen, um Fluid aus dem Druckbehälter 110, 120 in eine Umgebung des Druckbehälters 110, 120 abzulassen.
10. 10. Druckbehältersystem 100, das umfasst, mindestens zwei Druckbehälter 110, 120 zur Speicherung von Brennstoff 320; wobei der Zufluss und Abfluss von Brennstoff 320 jeweils über eine Ventil-Vorrichtung 112, 122 des jeweiligen Druckbehälters 110, 120 ermöglicht wird; wobei zumindest eine der Ventil-Vorrichtungen 112, 122 gemäß einem der vorhergehenden Aspekte ausgebildet ist.
11. 11. Druckbehältersystem 100, umfassend: mindestens zwei Druckbehälter 110, 120 zur Speicherung eines Brennstoffs 320; einen Betankungszugang 101, über den Brennstoff 320 für das Druckbehältersystem 100 in einem gemeinsamen Betankungsströmungspfad 302 bereitgestellt werden kann; und mindestens zwei separate Zuleitungen 111, 121, die die mindestens zwei Druckbehälter 110, 120 jeweils mit dem Betankungszugang 101 verbinden; wobei die separaten Zuleitungen 111, 121 von dem gemeinsamen Betankungsströmungspfad 302 abzweigen; wobei die Abzweigung von dem gemeinsamen Betankungsströmungspfad 302 in unmittelbar benachbart zu oder in dem Betankungszugang 101 erfolgt.
12. 12. Druckbehältersystem 100 gemäß Aspekt 11, wobei eine gemeinsame Leitungslänge des gemeinsamen Betankungsströmungspfads 302 von dem Betankungszugang 101 bis zu der Abzweigung kleiner ist als Zuleitungs-Leitungslängen der separaten Zuleitungen 111, 121 von der Abzweigung bis zu dem jeweiligen Druckbehälter 110, 120.
13. 13. Druckbehältersystem 100 gemäß Aspekt 12, wobei die gemeinsame Leitungslänge um einen Faktor 2, 5, 10, 20, 50, 100 oder mehr kleiner ist als jede der Zuleitungs-Leitungslängen.
14. 14. Druckbehältersystem 100 gemäß einem der vorhergehenden Aspekte, wobei die Abzweigung derart nah an dem Betankungszugang 101 angeordnet ist, dass Druckverluste in dem gemeinsamen Betankungsströmungspfad 302 von der Betankungs-Schnittstelle 301 bis zu der Abzweigung vernachlässigbar gering sind.
15. 15. Druckbehältersystem 100 gemäß einem der vorhergehenden Aspekte, wobei der gemeinsame Betankungsströmungspfad 302 von dem Betankungszugang 101 bis zu der Abzweigung derart ausgelegt ist, dass ein Druckabfall von Brennstoff 320 auf dem gemeinsamen Betankungsströmungspfad 302 kleiner, insbesondere um einen Faktor 2, 5, 10, 20, 50, 100 oder mehr kleiner, ist als ein Druckabfall auf den separaten Zuleitungen 111, 121 von der Abzweigung bis zu dem jeweiligen Druckbehälter 110, 120.
16. 16. Druckbehältersystem 100 gemäß einem der vorhergehenden Aspekte, wobei der Betankungszugang 101 ein Gehäuse 300 umfasst; und die Abzweigung von dem gemeinsamen Betankungsströmungspfad 302 in oder an dem Gehäuse 300 des Betankungszugangs 101 oder in unmittelbarer Nähe zu dem Gehäuse 300 des Betankungszugangs 101 erfolgt.
17. 17. Druckbehältersystem 100 gemäß Aspekt 16, wobei die Abzweigung unmittelbar an einer Außenseite einer Gehäusewand des Gehäuses 300 des Betankungszugangs 101 erfolgt; und die Abzweigung insbesondere innerhalb einer Abzweigeeinheit 303 mit einem Gehäuse 300 erfolgt, das unmittelbar an die Gehäusewand des Gehäuses 300 des Betankungszugangs 101 angrenzt.
18. 18. Druckbehältersystem 100 gemäß einem der vorhergehenden Aspekte, wobei der Betankungszugang 101 eine Betankungs-Schnittstelle 301, insbesondere eine Kupplung, zur Kupplung mit einer Zapfvorrichtung umfasst; und die Abzweigung von dem gemeinsamen Betankungsströmungspfad 302 in unmittelbarer Nähe von der Betankungs-Schnittstelle 301 des Betankungszugangs 101 erfolgt.
19. 19. Betankungszugang 101 für ein Druckbehältersystem 100, insbesondere nach einem der vorherigen Aspekte; wobei der Betankungszugang 101 umfasst, eine Betankungs-Schnittstelle 301, die eingerichtet ist, mit einer entsprechenden Schnittstelle einer Zapfvorrichtung gekoppelt zu werden, um Brennstoff 320 von der Zapfvorrichtung auf einem gemeinsamen Betankungsströmungspfad 302 aufzunehmen; eine erste Zuleitungs-Schnittstelle 311, die eingerichtet ist, mit einer ersten Zuleitung 111 zu einem ersten Druckbehälter 110 des Druckbehältersystems 100 gekoppelt zu werden; eine zweite Zuleitungs-Schnittstelle 312, die eingerichtet ist, mit einer zweiten Zuleitung 121 zu einem zweiten Druckbehälter 120 des Druckbehältersystems 100 gekoppelt zu werden; eine Abzweigeeinheit 303, in der die separaten Zuleitungs-Schnittstellen 311, 312 von dem gemeinsamen Betankungsströmungspfad 302 abzweigen; wobei die Abzweigeeinheit 303 in unmittelbarer Nähe zu der Betankungs-Schnittstelle 301 angeordnet ist.
20. 20. Betankungszugang 101 gemäß Aspekt 19, wobei der Betankungszugang 101 ein gemeinsames Gehäuse 300 umfasst; und die Betankungs-Schnittstelle 301, die Abzweigeeinheit 303 und die Zuleitungs-Schnittstellen 311, 312 in und/oder an dem gemeinsamen Gehäuse 300 angeordnet sind; und/oder, wobei die Abzeigeeinheit ein im Gehäuse 300 angeordnetes Kanalnetz umfasst, das eingerichtet ist, die Betankungs-Schnittstelle 301 mit der ersten und der zweiten Zuleitungs-Schnittstelle 311, 312 zu verbinden.
21. 21. Druckbehältersystem 100, umfassend: mindestens zwei Druckbehälter 110, 120 zur Speicherung eines Brennstoffs 320; einen Druckwandler 102, der eingerichtet ist, einen Druck von Brennstoff 320 auf einem gemeinsamen Versorgungsströmungspfad 402 zu wandeln; und mindestens zwei separate Entnahmeleitungen 113, 123, die die mindestens zwei Druckbehälter 110, 120 jeweils mit dem Druckwandler 102 verbinden; wobei die separaten Entnahmeleitungen 113, 123 in den gemeinsamen Versorgungsströmungspfad 402 münden; wobei die Mündung in den gemeinsamen Versorgungsströmungspfad 402 in unmittelbarer Nähe zu oder in dem Druckwandler 102 erfolgt.
22. 22. Druckbehältersystem 100 gemäß Aspekt 21, wobei eine gemeinsame Leitungslänge des gemeinsamen Versorgungsströmungspfads 402 von der Mündung bis zu dem Druckwandler 102 kleiner ist als Entnahmeleitungs-Leitungslängen der Entnahmeleitungen 113, 123 von dem jeweiligen Druckbehälter 110, 120 bis zu der Mündung; und die gemeinsame Leitungslänge insbesondere um einen Faktor 2, 5, 10, 20, 50, 100 oder mehr kleiner als jede der Entnahmeleitungs-Leitungslängen ist.
23. 23. Druckbehältersystem 100 gemäß einem der vorhergehenden Aspekte, wobei die Mündung derart nah an dem Betankungszugang 101 angeordnet ist, dass Druckverluste in dem gemeinsamen Versorgungsströmungspfad 402 von der Mündung bis zu dem Druckwandler 102 vernachlässigbar gering sind.
24. 24. Druckbehältersystem 100 gemäß einem der vorhergehenden Aspekte, wobei der gemeinsame Versorgungsströmungspfad 402 von der Mündung bis zu dem Druckwandler 102 derart ausgelegt ist, dass ein Druckabfall von Brennstoff 320 auf dem gemeinsamen Versorgungsströmungspfad 402 kleiner, insbesondere um einen Faktor 2, 5, 10, 20, 50, 100 oder mehr kleiner, ist als ein Druckabfall auf den separaten Entnahmeleitungen 113, 123 von dem jeweiligen Druckbehälter 110, 120 bis zu der Mündung.
25. 25. Druckbehältersystem 100 gemäß einem der vorhergehenden Aspekte, wobei der Druckwandler 102 ein Gehäuse 400 umfasst; und die Mündung zu dem gemeinsamen Versorgungsströmungspfad 402 in oder an dem Gehäuse 400 des Druckwandlers 102 oder in unmittelbarer Nähe zu dem Gehäuse 400 des Druckwandlers 102 erfolgt.
26. 26. Druckbehältersystem 100 gemäß Aspekt 25, wobei die Mündung unmittelbar an einer Außenseite einer Gehäusewand des Gehäuses 400 des Druckwandlers 102 erfolgt; und die Mündung insbesondere innerhalb einer Mündungseinheit 403 mit einem Gehäuse 400 erfolgt, das unmittelbar an die Gehäusewand des Gehäuses 400 des Druckwandlers 102 angrenzt.
27. 27. Druckbehältersystem 100 gemäß einem der vorhergehenden Aspekte, wobei der Druckwandler 102 ein gemeinsames Gehäuse 400 umfasst; die Druckwandlung des Drucks von Brennstoff 320 innerhalb des gemeinsamen Gehäuses 400 erfolgt; und die Mündung zu dem gemeinsamen Versorgungsströmungspfad 402 innerhalb des gemeinsamen Gehäuses 400 erfolgt.
28. 28. Druckwandler 102 für ein Druckbehältersystem 100, insbesondere nach einem der vorherigen Aspekte; wobei der Druckwandler 102 umfasst, eine erste Entnahmeleitungs-Schnittstelle 411, die eingerichtet ist, mit einer ersten Entnahmeleitung 113 von einem ersten Druckbehälter 110 des Druckbehältersystems 100 gekoppelt zu werden; eine zweite Entnahmeleitungs-Schnittstelle 412, die eingerichtet ist, mit einer zweiten Entnahmeleitung 123 von einem zweiten Druckbehälter 120 des Druckbehältersystems 100 gekoppelt zu werden; eine Wandlungseinheit 404, die eingerichtet ist, einen Druck von Brennstoff 320 auf einem gemeinsamen Versorgungsströmungspfad 402 von einem Eingangsdruck an einem Eingang der Wandlungseinheit 404 in einen Ausgangsdruck an einem Ausgang der Wandlungseinheit 404 zu wandeln; und eine Mündungseinheit 403, in der die separaten Entnahmeleitungs-Schnittstellen 411, 412 in den gemeinsamen Versorgungsströmungspfad 402 münden; wobei die Mündungseinheit 403 in unmittelbarer Nähe zu dem Eingang der Wandlungseinheit 404 angeordnet ist.
29. 29. Druckwandler 102 gemäß Aspekt 28, wobei der Druckwandler 102 ein gemeinsames Gehäuse 400 umfasst; und die Wandlungseinheit 404, die Mündungseinheit 403 und die Entnahmeleitungs-Schnittstellen 411, 412 in und/oder an dem gemeinsamen Gehäuse 400 angeordnet sind.
30. 30. Druckwandler 102 gemäß Aspekt 29, wobei die Mündungseinheit 403 ein im Gehäuse 400 angeordnetes Kanalnetz umfasst, das eingerichtet ist, den Eingang der Wandlungseinheit 404 mit der ersten und der zweiten Entnahmeleitungs-Schnittstelle 411, 412 zu verbinden.
31. 31. Druckbehältersystem, nach einem der vorherigen Ansprüche, bevorzugt umfassend:
    • - mindestens einen Druckwandler nach einem der Aspekte 28 bis 30;
    • - mindestens einen Betankungszugang nach einem der Aspekte 18 bis 20; und/oder
    • - mindestens eine Ventil-Vorrichtung nach einem der Aspekte 1 bis 9.

The technology disclosed here can be described, as it were, by the following aspects:

1. 1. Valve device 112 . 122 for a pressure vessel 110 . 120 for storing fuel 320 ; the valve device 112 . 122 includes: an inflow channel 221 with an inflow interface 201 that with at least one supply line 111 . 121 is connectable; one from the inflow channel 221 separate drainage channel 223 with a drain interface 202 with at least one sampling line 113 . 123 is connectable; a coupling point 216 at which the inflow channel 221 and the spillway 223 with a common channel 222 fluidly connected, wherein the common channel 222 in the assembled state of the valve device 112 . 122 with an interior of the pressure vessel 110 . 220 fluidly connected; and at least one flow restriction unit 204 . 205 configured to provide a backward flow of fluid in the inflow channel 221 and / or in the drainage channel 222 to limit.
2. 2. Valve device 112 . 122 according to aspect 1 , wherein the valve device 112 . 122 one, especially on the spillway 223 arranged, flow limitation unit 205 which is configured to provide a backward flow of fluid from the drainage interface 203 to the coupling point 216 to limit.
3. 3. Valve device 112 . 122 according to one of the preceding aspects, wherein the valve device 112 . 122 one, especially on the inflow channel 221 arranged, flow limitation unit 204 which is arranged to provide a backward flow of fluid from the coupling point 216 to the inflow interface 201 to limit.
4. 4. Valve device 112 . 122 according to any one of the preceding aspects, wherein the inflow channel 221 and the spillway 223 are adapted to each allow a forward value of volume and / or mass flow of the fluid in a respective forward direction; a flow restriction unit 204 . 205 is formed, the rearward flow of fluid in a respective rearward direction of the inflow channel 221 or the drainage channel 223 to limit to a reverse value of volume and / or mass flow of the fluid; and the reverse value is less than the forward value.
5. 5. Valve device 112 . 122 according to aspect 4 wherein the reverse value is substantially zero; and / or the flow restriction unit 204 . 205 a check valve is formed, which is designed to prevent the backward flow of fluid in the reverse direction.
6. 6. Valve device 112 . 122 according to aspect 4 where the backward value is greater than zero; and / or the flow restriction unit 204 . 205 comprises a throttle which is adapted to limit the volume and / or mass flow of the fluid differently in different flow directions.
7. 7. Valve device 112 . 122 according to any one of the preceding aspects, wherein the flow restriction unit 204 . 205 is set up, the backward flow of fluid on the inflow channel 221 or on the spillway 223 to limit to a lower value than a flow of fluid in a forward direction on the inflow channel 221 or on the spillway 223 ; and / or the backward flow of fluid on the inflow channel 221 or on the spillway 223 automatically, in particular without that for the supply of energy and / or a control signal are required to limit.
8. 8. Valve device 112 . 122 according to one of the preceding aspects, wherein the valve device 112 . 122 an electrically actuated valve 206 which is formed, the common channel 222 to close or open to the flow of fuel 320 in the common channel 222 to prevent or allow.
9. 9. Valve device 112 . 122 according to aspect 8th , wherein the electrically actuable valve 206 is normally closed and is adapted to be opened in response to a control signal; and / or the valve device 112 . 122 an inflow filter 202 which is established through the inflow channel 221 to filter flowing fluid; and / or the valve device 112 . 122 one on the common channel 223 arranged manual valve 214 which can be manually closed or opened; and / or the valve device 112 . 122 a pressure relief unit 209 which is arranged to trigger in the presence of a triggering condition to fluid from the pressure vessel 110 . 120 in an environment of the pressure vessel 110 . 120 drain.
10. 10. Pressure vessel system 100 that includes at least two pressure vessels 110 . 120 for storing fuel 320 ; being the inflow and outflow of fuel 320 each via a valve device 112 . 122 of the respective pressure vessel 110 . 120 is possible; wherein at least one of the valve devices 112 . 122 formed according to one of the preceding aspects.
11. 11. Pressure vessel system 100 comprising: at least two pressure vessels 110 . 120 for storing a fuel 320 ; a refueling access 101 , about the fuel 320 for the pressure vessel system 100 in a common refueling flowpath 302 can be provided; and at least two separate supply lines 111 . 121 holding the at least two pressure vessels 110 . 120 each with refueling access 101 connect; the separate supply lines 111 . 121 from the common refueling flowpath 302 branch; the branch being from the common refueling flowpath 302 in immediately adjacent to or in the refueling access 101 he follows.
12. 12. Pressure vessel system 100 according to aspect 11 wherein a common line length of the common refueling flowpath 302 from refueling access 101 until the branch is smaller than the supply line lengths of the separate supply lines 111 . 121 from the branch to the respective pressure vessel 110 . 120 ,
13. 13. Pressure vessel system 100 according to aspect 12 , wherein the common line length by one factor 2 . 5 . 10 . 20 . 50 . 100 or more smaller than each of the feeder line lengths.
14. 14. Pressure vessel system 100 according to any one of the preceding aspects, wherein the diversion is so close to the refueling access 101 is arranged that pressure losses in the common refueling flow path 302 from the refueling interface 301 are negligible up to the junction.
15. 15. Pressure vessel system 100 according to one of the preceding aspects, wherein the common refueling flow path 302 from refueling access 101 to the branch is designed such that a pressure drop of fuel 320 on the common refueling flowpath 302 smaller, especially by a factor 2 . 5 . 10 . 20 . 50 . 100 or more smaller than a pressure drop on the separate supply lines 111 . 121 from the branch to the respective pressure vessel 110 . 120 ,
16. 16. Pressure vessel system 100 according to any one of the preceding aspects, wherein the refueling access 101 a housing 300 includes; and the branch from the common refueling flowpath 302 in or on the housing 300 refueling access 101 or in close proximity to the housing 300 refueling access 101 he follows.
17. 17. Pressure vessel system 100 according to aspect 16 wherein the branch is directly on an outer side of a housing wall of the housing 300 refueling access 101 he follows; and the branch especially within a branch unit 303 with a housing 300 takes place, directly to the housing wall of the housing 300 refueling access 101 borders.
18. 18. Pressure vessel system 100 according to any one of the preceding aspects, wherein the refueling access 101 a refueling interface 301 , in particular a coupling, for coupling with a dispensing device comprises; and the branch from the common refueling flowpath 302 in the immediate vicinity of the refueling interface 301 refueling access 101 he follows.
19. 19. Refueling access 101 for a pressure vessel system 100 in particular according to one of the previous aspects; the refueling access 101 includes, a refueling interface 301 adapted to be coupled to a corresponding interface of a dispensing device for fuel 320 from the tapping device on a common refueling flowpath 302 record; a first feeder interface 311 which is set up, with a first supply line 111 to a first pressure vessel 110 of the pressure vessel system 100 to be coupled; a second feeder interface 312 which is set up, with a second supply line 121 to a second pressure vessel 120 of the pressure vessel system 100 to be coupled; a branch unit 303 in which the separate feeder interfaces 311 . 312 from the common refueling flowpath 302 branch; wherein the branch unit 303 in close proximity to the refueling interface 301 is arranged.
20. 20. Refueling access 101 according to aspect 19 , where the refueling access 101 a common housing 300 includes; and the refueling interface 301 , the branch unit 303 and the feeder interfaces 311 . 312 in and / or on the common housing 300 are arranged; and / or, wherein the display unit in the housing 300 arranged sewer network, which is established, the refueling interface 301 with the first and second feeder interface 311 . 312 connect to.
21. 21. Pressure vessel system 100 comprising: at least two pressure vessels 110 . 120 for storing a fuel 320 ; a pressure transducer 102 which is set up, a pressure of fuel 320 on a common supply flow path 402 to walk; and at least two separate sampling lines 113 . 123 holding the at least two pressure vessels 110 . 120 each with the pressure transducer 102 connect; the separate extraction lines 113 . 123 in the common supply flow path 402 lead; the mouth into the common supply flow path 402 in close proximity to or in the pressure transducer 102 he follows.
22. 22. Pressure vessel system 100 according to aspect 21 wherein a common line length of the common supply flow path 402 from the mouth to the pressure transducer 102 smaller than withdrawal line lengths of the extraction lines 113 . 123 from the respective pressure vessel 110 . 120 to the mouth; and the common line length in particular by a factor 2 . 5 . 10 . 20 . 50 . 100 or more is less than each of the extraction line lengths.
23. 23. Pressure vessel system 100 according to any one of the preceding aspects, wherein the orifice is so close to the refueling access 101 is arranged that pressure losses in the common supply flow path 402 from the mouth to the pressure transducer 102 negligible.
24. 24. Pressure vessel system 100 according to one of the preceding aspects, wherein the common supply flow path 402 from the mouth to the pressure transducer 102 is designed such that a pressure drop of fuel 320 on the common supply flow path 402 smaller, especially by a factor 2 . 5 . 10 . 20 . 50 . 100 or more smaller than a pressure drop on the separate sampling lines 113 . 123 from the respective pressure vessel 110 . 120 to the mouth.
25. 25. Pressure vessel system 100 according to one of the preceding aspects, wherein the pressure transducer 102 a housing 400 includes; and the mouth to the common supply flow path 402 in or on the housing 400 of the pressure transducer 102 or in close proximity to the housing 400 of the pressure transducer 102 he follows.
26. 26. Pressure vessel system 100 according to aspect 25 wherein the mouth directly on an outer side of a housing wall of the housing 400 of the pressure transducer 102 he follows; and the mouth especially within a mouth unit 403 with a housing 400 takes place, directly to the housing wall of the housing 400 of the pressure transducer 102 borders.
27. 27. Pressure vessel system 100 according to one of the preceding aspects, wherein the pressure transducer 102 a common housing 400 includes; the pressure conversion of the pressure of fuel 320 within the common housing 400 he follows; and the mouth to the common supply flow path 402 within the common housing 400 he follows.
28. 28. Pressure transducer 102 for a pressure vessel system 100 in particular according to one of the previous aspects; the pressure transducer 102 includes a first sampling line interface 411 , which is set up, with a first sampling line 113 from a first pressure vessel 110 of the pressure vessel system 100 to be coupled; a second sampling line interface 412 which is set up, with a second withdrawal line 123 from a second pressure vessel 120 of the pressure vessel system 100 to be coupled; a conversion unit 404 that is set up, a pressure of fuel 320 on a common supply flow path 402 from an input pressure at an input of the conversion unit 404 in an output pressure at an output of the conversion unit 404 to walk; and a mouth unit 403 in which the separate sampling line interfaces 411 . 412 in the common supply flow path 402 lead; the muzzle unit 403 in the immediate vicinity of the entrance of the conversion unit 404 is arranged.
29. 29. Pressure transducer 102 according to aspect 28 , wherein the pressure transducer 102 a common housing 400 includes; and the conversion unit 404 , the mouth unit 403 and the sampling line interfaces 411 . 412 in and / or on the common housing 400 are arranged.
30. 30. Pressure transducer 102 according to aspect 29 , wherein the mouth unit 403 one in the case 400 arranged channel network, which is set up, the input of the conversion unit 404 with the first and second sampling line interface 411 . 412 connect to.
31. 31. Pressure vessel system according to one of the preceding claims, preferably comprising:
    • - at least one pressure transducer according to one of the aspects 28 to 30 ;
    • - at least one refueling access according to one of the aspects 18 to 20 ; and or
    • - At least one valve device according to one of the aspects 1 to 9 ,

• 1 ein beispielhaftes Druckbehältersystem mit mehreren Druckbehältern;
• 2 eine beispielhafte Ventil-Vorrichtung für einen Druckbehälter;
• 3 einen beispielhaften Betankungszugang; und
• 4 einen beispielhaften Druckwandler.

Furthermore, the invention will be described in more detail with reference to exemplary embodiments. Show

• 1 an exemplary pressure vessel system with multiple pressure vessels;
• 2 an exemplary valve device for a pressure vessel;
• 3 an exemplary fueling access; and
• 4 an exemplary pressure transducer.

As stated above, the present document is concerned with refueling and pressure equalization in a pressure vessel system having multiple pressure vessels.

1 shows an exemplary pressure vessel system 100 with a first pressure vessel 110 and a second pressure vessel 120 , The pressure vessels each have valve devices 112 . 122 on which the influx and outflow of fuel to and from the pressure vessels 110 . 120 can be controlled.

This in 1 illustrated pressure vessel system 100 includes supply lines 111 . 121 Being trained to fuel from a refueling gateway 101 to the pressure vessels 110 . 120 respectively. The refueling access 101 is designed as a unit (eg with a unitary housing). In particular, directly at the refueling access 101 the two separate supply lines 111 . 121 for the two pressure vessels 110 . 120 (led out of a single housing). So can two or more pressure vessels 110 . 120 be refueled in an efficient and reliable way. Furthermore, so can pressure losses on the fuel transmission path between the refueling access 101 and the pressure vessels 110 . 120 be reduced, which increases the reliability of refueling.

3 shows an exemplary refueling access 101 for a pressure vessel system 100 , The refueling access 101 includes a refueling interface 301 adapted to be coupled to a corresponding interface of a dispensing device for fuel 320 from the tapping device on a common refueling flowpath 302 refueling access 101 take. The refueling flowpath 302 can be designed as a common fuel-carrying line. In the fueling flow path, a fuel filter may be provided (not shown).

It also includes refueling access 101 a first feeder interface 311 which is set up with the first supply line 111 to the first pressure vessel 110 of the pressure vessel system 100 to be coupled. Furthermore, the refueling access includes 101 a second feeder interface 312 which is set up with the second supply line 121 to the second pressure vessel 120 of the pressure vessel system 100 to be coupled.

How out 3 As can be seen, the separate feeder interfaces branch 311 . 312 from the common refueling flowpath 302 from. The branch can be in a branch unit 303 respectively. Here is the branch unit 303 in close proximity to the refueling interface 301 arranged. In particular, the refueling interface 301 , the branch unit 303 and the feeder interfaces 311 . 312 in or on a common housing 300 refueling access 101 be arranged. This is a particularly space-, weight- and cost-effective pressure vessel system 100 allows. Furthermore, such a particularly reliable refueling of the pressure vessel 110 . 120 be effected.

The first supply line 111 becomes an input of the first valve device 112 of the first pressure vessel 110 guided. In a corresponding manner, the second supply line 121 to an input of the second valve device 122 of the second pressure vessel 120 guided. So can the two pressure vessels 110 . 120 from a refueling gateway 101 to be refueled out.

The pressure vessel system 100 also includes a first sampling line 113 connected to an outlet of the first valve device 112 and a second sampling line 123 connected to an outlet of the second valve device 122 connected is. About the sampling lines 113 . 123 can fuel 320 from the pressure vessels 110 . 120 to a pressure transducer 102 be guided. Typically, the pressure in the pressure vessels 110 . 120 higher than the operating pressure of a fuel consumer 103 (eg a fuel cell or a fuel cell stack). The operating pressure of a fuel consumer 103 can be in the range of 10-20 bar, for example. The pressure in a pressure vessel 110 . 120 can be, for example, by the factor 2 . 5 . 10 . 20 . 50 . 100 or more than the operating pressure of a fuel consumer 103 , The pressure transducer 102 (In particular, a pressure regulator) may be configured, the pressure of the fuel 320 from the pressure vessels 110 . 120 in the required operating pressure of the fuel consumer 103 to change.

4 shows an exemplary pressure transducer 102 for a pressure vessel system 100 , The pressure transducer 102 includes a first extraction line interface 411 that is set up, with the first sampling line 113 from the first pressure vessel 110 of the pressure vessel system 100 to be coupled. Furthermore, the pressure transducer includes 102 a second sampling line interface 412 which is set up, with the second sampling line 123 from the second pressure vessel 120 of the pressure vessel system 100 to be coupled. About the sampling line interfaces 411 . 412 can separate fuel 320 from the pressure vessels 110 . 120 on the pressure transducer 102 to be provided. The fuel 320 can thus close to the actual pressure conversion in the pressure transducer 102 in separate sampling lines 113 . 123 from the different pressure vessels 110 . 120 of the pressure vessel system 100 be guided. So can a reliable removal of fuel 320 from all pressure vessels 110 . 120 a pressure vessel system 100 be enabled.

The pressure transducer 102 further comprises a conversion unit 404 that is set up, the pressure of fuel 320 on a common supply flow path 402 from an input pressure at an input of the conversion unit 404 in an output pressure at an output of the conversion unit 404 to change. The common supply flow path 402 can be at the output of the conversion unit 404 , if necessary via a supply interface 401 of the pressure transducer 102 , with a fuel consumer 103 Be connected fuel-conducting.

The conversion unit 404 thus can the pressure of the fuel 320 on a common supply flow path 402 (eg on a shared line). Furthermore, a filter may be provided here (not shown). In this case, in particular, the output pressure of the fuel 320 smaller than the input pressure of the fuel 320 , eg by a factor 2 . 5 . 10 . 20 or more. The inlet pressure can be essentially the pressure of the fuel 320 in at least one of the pressure vessels 110 . 120 correspond. On the other hand, the output pressure may be an operating pressure of the fuel consumer 103 correspond. The conversion unit 404 may include one or more pressure regulators (in particular proportional pressure regulators).

The separate sampling line interfaces 411 . 412 lead, as in 4 shown in the common supply flow path 402 , In this case, the mouth in a mouth unit 403 respectively. The mouth unit 403 may for example have a Y-shape. The mouth unit 403 can be in close proximity to the entrance of the conversion unit 404 is arranged. In particular, both the sampling line interfaces 411 . 412 , the mouth unit 403 and the conversion unit 404 in or on a common housing 400 of the pressure transducer 102 be arranged. So can a space, weight and cost-effective pressure vessel system 100 to be provided. Furthermore, such a reliable removal of fuel 320 from the individual pressure vessels 110 . 120 and thus a reliable fuel supply of a fuel consumer 103 be enabled.

In a break in operation of the pressure vessel system 100 are typically the valve devices 112 . 122 the pressure vessel 110 . 120 closed, leaving fuel 320 neither in the pressure vessel 110 . 120 still get out of the pressure vessels 110 . 120 can escape. The pressure vessels 110 . 120 may be exposed to different environmental conditions during the break. For example, the first pressure vessel 110 during the break in operation (eg by sunlight) are heated more than the second pressure vessel 120 , Furthermore, density differences (due to different temperature and / or pressure) may occur for different container sizes or container types or different extraction conditions per container. As a result, the fuel pressure in the first pressure vessel 110 be higher than the fuel pressure in the second pressure vessel at the end of the operating phase 120 ,

When commissioning the pressure tank system 100 after a break in operation are typically the valve devices 112 . 122 the pressure vessel 110 . 120 open. Due to the pressure differences in the pressure vessels 110 . 120 when opening the valve devices 112 . 122 corresponding pressure differences in the sampling lines 113 . 123 causes. As the withdrawal lines 113 . 123 at the entrance of the pressure transducer 102 coupled to each other, leads the relatively higher pressure in the first extraction line 113 to the fact that for pressure equalization relatively fast fuel 320 from the first pressure vessel 110 in the first sampling line 113 and possibly via the second sampling line 123 in the second pressure vessel 120 flows. Such pressure equalization when opening the valve devices 112 . 122 can lead to relatively high flow noise, which is for a user of the pressure vessel system 100 can be disturbing. Furthermore, by a relatively high mass flow from the first pressure vessel 110 incorrectly a pipe rupture protection of the first valve device 112 be triggered so that the first valve device 112 the first pressure vessel 110 closes and thus the fuel flow from the first pressure vessel 110 interrupts.

One of the above situation corresponding situation could be in the refueling of the pressure vessel system 100 result. For refueling the pressure vessel 110 . 120 If necessary, the valve devices 112 . 122 be opened. The higher fuel pressure in the first pressure vessel 110 (compared to the fuel pressure in the second pressure vessel 120 ) can cause refueling fuel 320 from the first pressure vessel 110 in the first supply line 111 exit and via the refueling access 101 in the second supply line 121 and in the second pressure vessel 120 flows to the pressure differences between the two pressure vessels 110 . 120 compensate.

2 shows an exemplary valve device 112 . 122 for a pressure vessel 110 . 120 , The valve device 112 . 122 includes an inflow interface 201 for coupling a supply line 111 . 121 , as well as a drain interface 203 for coupling a sampling line 113 . 123 , The over the inflow interface 201 supplied fuel 320 can be in an inflow filter 202 be filtered to contamination of the pressure vessel 110 . 120 to avoid or reduce.

The the inflow interface 201 comprehensive inflow channel 221 for supplying fuel 320 and the drain interface 203 comprehensive drainage channel 223 for discharging fuel 320 can at a coupling point 216 with each other and with a common channel 222 be coupled. The common channel 222 can the coupling point 216 with the interior of a pressure vessel 110 . 120 connect.

The common channel 222 can be an electrically operated valve 206 exhibit. The electrically operated valve 206 can via a data bus with a data interface 210 the valve device 112 . 122 be electrically connected. Via the data interface 210 a control signal indicating that the electrically operable valve may be received may be received 206 should be opened or closed. The electrically operated valve 206 may include, for example, an electromagnetic valve.

Parallel to the electrically actuated valve 206 can be a check valve 215 be arranged. The check valve 215 may be arranged such that leakage of fuel 320 from the pressure vessel 110 . 120 is avoided, however, by overcoming the restoring force of the check valve 215 the supply of fuel 320 in the pressure vessel 110 . 120 (eg in a refueling operation) is made possible. Furthermore, the electrically actuable valve 206 possibly by a manual valve 207 be bridged. The manual valve 207 can be opened manually by a user, for example, to the pressure vessel 110 . 120 at least partially to recharge.

The inflow channel 221 and the spillway 223 can thus start from the coupling point 216 over the common channel 222 together in the interior of the pressure vessel 110 . 120 run. This can be the common channel 222 via another manual valve 214 be guided, which can be used to a pressure vessel 110 . 120 manually close or open. Furthermore, the common channel 222 via another drain filter 212 be guided, with which the fuel 320 before the feed to the fuel consumer 103 can be filtered.

The valve device 112 . 122 can continue a temperature sensor 213 with an evaluation unit 208 include that with the data interface 210 connected is. So can sensor data regarding the temperature of the pressure vessel 110 . 120 and / or the stored fuel 320 to be provided. In addition, the valve device 112 . 122 a pressure relief unit 209 (For example, a temperature pressure release device, TPRD), which is formed, the pressure vessel 110 . 120 upon reaching or exceeding a temperature threshold, open to fuel 320 via a ventilation unit 211 to drain and thereby the pressure in the interior of the pressure vessel 110 . 120 to reduce.

The drainage channel 223 can between the coupling point 216 where the spillway 223 and the inflow channel 221 be merged, and the drain interface 203 a flow restriction unit 205 which is adapted to the rearward flow of fuel 320 from the drain interface 203 to the coupling point 216 to limit and possibly to prevent. The flow limitation unit 205 may comprise a check valve which is adapted to completely prevent a backward flow. Alternatively or additionally, the flow limitation unit 205 (For example, parallel to the check valve) have a throttle which is adapted to limit the backward flow to a certain maximum value (eg to a maximum value of the mass flow and / or the volume flow).

By providing a flow-limiting unit 205 especially when commissioning a pressure vessel system 100 after a break in operation, a pressure equalization of the fuel pressures in the different pressure vessels 110 . 120 via the sampling lines 113 . 123 be limited or slowed down. Thus, high pressure equalization currents and associated noise can be avoided. Furthermore, the incorrect triggering of a pipe rupture protection can be avoided.

In a similar way can also on the inflow channel 221 between the inflow interface 201 and the coupling point 216 a flow restriction unit 204 be arranged, which is the backward flow of fuel 320 from the pressure vessel 110 . 120 limited to a certain maximum value (eg by means of a throttle) and / or blocked (eg by a check valve). So can fuel flows for a pressure equalization over the supply lines 111 . 121 be limited (eg at the beginning of a refueling operation).

By the separation of filling lines 111 . 121 and sampling lines 113 . 123 as well as by the installation of one or more flow limitation units 204 . 205 (For example, each having a check valve and / or a backflow preventer or reflux reducer) can at any time overflow of a pressure vessel 110 . 120 in a pressure vessel system 100 with several pressure vessels 110 . 120 be prevented.

Furthermore, by installing a check valve (within the flow restrictor unit 204 . 205 ) in front of the electrically actuated valve 206 (which may also be referred to as an electromagnetic shut-off valve) causes a closed manual valve 214 the pressure vessel 210 . 220 the fuel consumer 203 in a test mode directly and exclusively via refueling access 101 (or via the tank nipple) can be supplied externally. The fuel 320 from refueling access 101 flows through the supply line 111 , via the flow restriction unit 204 the inflow channel 221 , about the coupling point 216 , via the flow restriction unit 205 the drainage channel 223 and about the sampling line 113 to the fuel consumer 103 , In this case, a cleaning of the fuel takes place 320 through the inflow filter 202 ,

The measures described in this document can cause relatively loud flow noises when starting a pressure vessel system 100 (eg at a vehicle start) be avoided. In particular, different fuel pressures in different pressure vessels 110 . 120 be balanced reliably and controlled. This also allows the selective removal of fuel 320 from a pressure vessel 110 . 120 because of the resulting pressure difference between the pressure vessels 110 . 120 can be degraded reliably and safely. Furthermore, the provision of flow restriction units 204 . 205 an efficient external supply of a fuel consumer 103 via refueling access 101 of the pressure vessel system 100 ,

The present invention is not limited to the embodiments shown. In particular, it should be noted that the description and figures are intended to illustrate only the principle of the proposed methods, apparatus and systems.

LIST OF REFERENCE NUMBERS

100

Pressure vessel system

101

refueling access

102

pressure transducer

103

Fuel consumers

110, 120

pressure vessel

111, 121

supply

112, 122

Valve means

113, 123

withdrawal line

201

Tributary interface

202

Flow filter

203

Drain interface

204, 205

Flow limiter

206

electrically actuated valve

207

manual valve (parallel to the electrically operated valve)

208

evaluation

209

Pressure relief unit

210

Data Interface

211

venting unit

212

Drain filter

213

temperature sensor

214

manual valve (in series with the electrically operated valve)

215

Check valve (parallel to the electrically operated valve)

216

coupling point

221

inlet channel

222

common channel

223

spillway

300

Housing (refueling access)

301

Refueling interface

302

common refueling flowpath

303

Abzweigeeinheit

311

Lead line interface

320

fuel

400

Housing (pressure transducer)

401

Supply interface

402

common supply flow path

403

mouth unit

404

conversion unit

411, 412

Sample line interface

Claims (10)

Pressure vessel system (100), comprising: - At least two pressure vessels (110, 120) for storing a fuel (320); - a pressure transducer (102) arranged to convert a pressure of fuel (320) on a common supply flow path (402); and - At least two separate extraction lines (113, 123) connecting the at least two pressure vessels (110, 120) each with the pressure transducer (102); the separate withdrawal conduits (113, 123) opening into the common supply flowpath (402); the orifice communicating with the common supply flowpath (402) in close proximity to or in the pressure transducer (102). Pressure vessel system (100) according to Claim 1 wherein: a common line length of the common supply flow path (402) from the mouth to the pressure transducer (102) is less than withdrawal line lengths of the extraction lines (113, 123) from the respective pressure vessel (110, 120) to the orifice; and - in particular, the common line length is less than each of the extraction line lengths by a factor of 2, 5, 10, 20, 50, 100 or more. The pressure vessel system (100) of any one of the preceding claims, wherein the orifice is positioned close to the refueling access (101) such that pressure losses in the common supply flowpath (402) from the orifice to the pressure transducer (102) are negligibly small. The pressure vessel system (100) of any one of the preceding claims, wherein the common supply flowpath (402) from the orifice to the pressure transducer (102) is configured such that a pressure drop of fuel (320) on the common supply flowpath (402) is smaller, especially smaller a factor of 2, 5, 10, 20, 50, 100 or more smaller than a pressure drop on the separate withdrawal lines (113, 123) from the respective pressure vessel (110, 120) to the mouth. Pressure vessel system (100) according to one of the preceding claims, wherein - The pressure transducer (102) comprises a housing (400); and - The mouth to the common supply flow path (402) in or on the housing (400) of the pressure transducer (102) or in close proximity to the housing (400) of the pressure transducer (102). Pressure vessel system (100) according to Claim 5 in which - the mouth takes place directly on an outer side of a housing wall of the housing (400) of the pressure transducer (102); and - the mouth takes place in particular within a mouth unit (403) with a housing (400) which directly adjoins the housing wall of the housing (400) of the pressure transducer (102). Pressure vessel system (100) according to one of the preceding claims, wherein - The pressure transducer (102) comprises a common housing (400); - the pressure conversion of the pressure of fuel (320) within the common housing (400) takes place; and - The mouth to the common supply flow path (402) within the common housing (400) takes place. Pressure transducer (102) for a pressure vessel system (100), in particular according to one of the preceding claims; wherein the pressure transducer comprises (102) - a first extraction line interface (411) arranged to be coupled to a first extraction line (113) from a first pressure vessel (110) of the pressure vessel system (100); a second sampling line interface (412) arranged to be coupled to a second sampling line (123) from a second pressure vessel (120) of the pressure vessel system (100); - a conversion unit (404) arranged to convert a pressure of fuel (320) on a common supply flow path (402) from an input pressure at an input of the conversion unit (404) to an output pressure at an output of the conversion unit (404); and - an orifice unit (403) in which the separate bleed line interfaces (411, 412) open into the common supply flow path (402); wherein the mouth unit (403) is disposed in close proximity to the input of the conversion unit (404). Pressure transducer (102) according to Claim 8 wherein - the pressure transducer (102) comprises a common housing (400); and - the conversion unit (404), the orifice unit (403) and the extraction line interfaces (411, 412) are arranged in and / or on the common housing (400). Pressure transducer (102) according to Claim 9 wherein the orifice unit (403) comprises a channel network disposed in the housing (400) and configured to connect the input of the conversion unit (404) to the first and second extraction line interfaces (411, 412).

Images