WO2020076210A1 - An arrangement for facilitating evacuating evaporated liquefied gas of a liquefied gas fuel system of a vehicle - Google Patents

An arrangement for facilitating evacuating evaporated liquefied gas of a liquefied gas fuel system of a vehicle Download PDF

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Publication number
WO2020076210A1
WO2020076210A1 PCT/SE2019/050902 SE2019050902W WO2020076210A1 WO 2020076210 A1 WO2020076210 A1 WO 2020076210A1 SE 2019050902 W SE2019050902 W SE 2019050902W WO 2020076210 A1 WO2020076210 A1 WO 2020076210A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipe
boil
tank
cab
vehicle
Prior art date
Application number
PCT/SE2019/050902
Other languages
French (fr)
Inventor
Gustav JÖNSSON
Mahan KHOSHNEVIS
Sivert Eriksson
Original Assignee
Scania Cv Ab
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 Scania Cv Ab filed Critical Scania Cv Ab
Priority to DE112019004394.3T priority Critical patent/DE112019004394T5/en
Publication of WO2020076210A1 publication Critical patent/WO2020076210A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K15/035—Fuel tanks characterised by venting means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/01—Arrangement of fuel conduits
    • B60K15/013—Arrangement of fuel conduits of gas conduits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D33/00—Superstructures for load-carrying vehicles
    • B62D33/06—Drivers' cabs
    • B62D33/063—Drivers' cabs movable from one position into at least one other position, e.g. tiltable, pivotable about a vertical axis, displaceable from one side of the vehicle to the other
    • B62D33/067—Drivers' cabs movable from one position into at least one other position, e.g. tiltable, pivotable about a vertical axis, displaceable from one side of the vehicle to the other tiltable
    • 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
    • F17C13/005—Details of vessels or of the filling or discharging of vessels for medium-size and small storage vessels not under pressure
    • 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
    • F17C13/12—Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures
    • 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
    • F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
    • F17C7/02—Discharging liquefied gases
    • F17C7/04—Discharging liquefied gases with change of state, e.g. vaporisation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K15/035—Fuel tanks characterised by venting means
    • B60K2015/03523—Arrangements of the venting tube
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/10—Road Vehicles
    • B60Y2200/14—Trucks; Load vehicles, Busses
    • B60Y2200/142—Heavy duty trucks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/056—Small (<1 m3)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F17C2205/0332—Safety valves or pressure relief valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0352—Pipes
    • 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
    • F17C2205/0352—Pipes
    • F17C2205/0364—Pipes flexible or articulated, e.g. a hose
    • 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
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/035—Propane butane, e.g. LPG, GPL
    • 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
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • 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
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, 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
    • F17C2223/03—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
    • F17C2223/033—Small pressure, e.g. for liquefied gas
    • 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
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/03—Dealing with losses
    • F17C2260/031—Dealing with losses due to heat transfer
    • 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
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/03—Treating the boil-off
    • F17C2265/031—Treating the boil-off by discharge
    • 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
    • F17C2270/0171—Trucks

Definitions

  • the invention relates to an arrangement for facilitating evacuating evaporated liquefied gas of a liquefied gas fuel system of a vehicle
  • the invention also relates to a vehicle.
  • Systems for liquefied gas i.e. LNG and LBG
  • a relief valve which according to an embodiment is set to open at 16 bar for evacuating evaporated gas.
  • the fuel tank/tanks for liquefied gas systems are usually arranged along and in connection to the vehicle frame.
  • the evaporated gas is configured to be evacuated via a so called boil-off pipe connected to the fuel tank.
  • the gas needs to be evacuated at a certain height.
  • the boil-off pipe is further not allowed to project laterally or upwardly from the vehicle.
  • the boil-off pipe is therefore usually arranged behind the cab of the truck.
  • the boil-off pipe is according to a variant arranged to be connected to a vertical member arranged in connection to and at a distance from the rear side of the cab to avoid influence from the tilting.
  • An object of the present disclosure is to provide an arrangement for facilitating evacuating evaporated liquefied gas of a liquefied gas fuel system of a vehicle.
  • Another object of the present invention is to provide a vehicle comprising such an arrangement.
  • an object of the invention is achieved by an arrangement for facilitating evacuating evaporated liquefied gas of a liquefied gas fuel system of a vehicle.
  • the vehicle has a tiltable cab and a vehicle chassis, the cab being movably connected to the vehicle chassis in a non-tilted position of the cab.
  • the fuel system has a chassis-mounted liquefied gas fuel tank for providing fuel to the engine of the vehicle, and a boil-off pipe. Evaporated gas is arranged to be evacuated from the tank via the boil-off pipe at a certain tank pressure.
  • the boil-off pipe is attached to the rear side of the cab.
  • the arrangement is configured to allow evaporated gas from the tank to be evacuated through the boil-off pipe in the non-tilted position.
  • the arrangement comprises a downwardly open conical configuration as a lower end connection of the boil- off pipe and a tank pipe member attached to the tank for conveying evaporated gas from the tank.
  • the conical configuration and tank pipe member are configured so that, when the cab is moved from the tilted to the non-tilted position, a portion of the tank pipe member is introduced into the conical configuration and further into the boil-off pipe above the conical configuration so that gas evaporated from the tank is introduced into and evacuated through the boil-off pipe via the tank pipe member.
  • the cab-mounted boil-off pipe and the chassis-mounted liquefied gas fuel tank may, when the cab is moved from a tilted to a non-tilted position, easily and automatically be brought into a position in which gas evaporated from the tank is evacuated through the boil-off pipe.
  • the solution with the downwardly open conical configuration as a lower end connection of the boil- off pipe configured to receive a tank pipe member makes it easy to design the size of the bottom opening of the conical configuration sufficiently large for allowing the tank pipe member to be introduced into the lower opening of the conical configuration independent of certain movement of the cab and thus conical configuration relative to the chassis and thus tank pipe member and certain movement of the introduction portion of the tank pipe member relative to the conical configuration.
  • the conical configuration and tank pipe member are configured so that, in the non-tilted position, during cab and thus conical configuration movement, the conical configuration is allowed to move relative to the portion of the tank pipe member introduced into the boil- off pipe above the conical configuration.
  • risk of fatigue and wear in connection to cab movements in the non-tilted position of the cab may be reduced.
  • the boil-off pipe and the portion of the tank member in the boil-off pipe are dimensioned to promote an ejector effect for facilitating evacuation of the gas through the boil-off pipe.
  • the risk of the gas evaporated from the tank and evacuated from the portion of the tank pipe member flowing backwards in the space between the portion of the tank pipe member and the boil-off pipe towards the opening of the conical configuration is reduced.
  • the lower end portion of the boil-off pipe above the conical configuration and below the upper end of the end portion of the tank pipe member introduced into the boil-off pipe comprises a waist configuration for promoting an ejector effect for facilitating evacuation of the gas through the boil-off pipe.
  • the risk of the gas evaporated from the tank and evacuated from the portion of the tank pipe member flowing backwards in the space between the portion of the tank pipe member and the boil-off pipe towards the opening of the conical configuration is further reduced.
  • a vehicle comprising an arrangement as set out herein.
  • Fig. 1 a schematically illustrates a side view of a vehicle with a tiltable cab in a non-tilted position, the vehicle having an arrangement for facilitating evacuating evaporated liquefied gas of a liquefied gas fuel system of a vehicle according to an embodiment of the present disclosure
  • Fig. 1 b schematically illustrates a side view of the vehicle in fig. 1 a with the cab in a tilted position;
  • Fig. 2 schematically illustrates a perspective view of boil-off pipe and tank pipe member of the liquefied gas fuel system and the arrangement for facilitating evacuating evaporated liquefied gas of the liquefied gas fuel system for a non- tilted position according to an embodiment of the present disclosure
  • Fig. 3 schematically illustrates a side view of an arrangement for facilitating evacuating evaporated liquefied gas of a liquefied gas fuel system of a vehicle according to an embodiment of the present disclosure
  • Fig. 4 schematically illustrates a perspective view of an arrangement for facilitating evacuating evaporated liquefied gas of a liquefied gas fuel system of a vehicle according of an embodiment of the present disclosure.
  • liquefied gas refers to liquefied natural gas, LNG, or liquefied biogas, LBG.
  • liquefied gas fuel system refers to a fuel system for liquefied natural gas, LNG, or a fuel system for liquefied biogas, LBG.
  • flexible hose refers to hoses configured to transport fluid for a liquefied gas fuel system, the hose being bendable to a certain degree and having a certain flexibility so as to facilitate taking up relative movements of a vehicle cab relative to a liquefied gas fuel tank.
  • boil-off pipe refers to a pipe, preferably a rigid pipe, configured to evacuate evaporated gas from a liquefied gas fuel tank of a liquefied gas fuel system.
  • the pipe is according to an embodiment made of stainless steel.
  • the boil-off pipe could alternatively be flexible such as a flexible hose.
  • the boil-off pipe may have any suitable cross section comprising circular cross section or other polygonal cross section such as e.g. square cross section.
  • tank pipe member refers to any suitable pipe or hose or a combination thereof.
  • the tank pipe member may have any suitable cross section comprising circular cross section or other polygonal cross section such as e.g. square cross section.
  • Fig. 1 a schematically illustrates a side view of a vehicle 1 with a tiltable cab 2 in a non-tilted position
  • fig. 1 b schematically illustrates a side view of the vehicle 1 in fig. 1 a with the cab 2 in a tilted position.
  • the vehicle has an arrangement A for facilitating evacuating evaporated liquefied gas of a liquefied gas fuel system I of a vehicle according to an embodiment of the present disclosure.
  • the vehicle 1 has a vehicle chassis 3.
  • the cab 2 is tiltable relative to the vehicle chassis 3.
  • the cab 2 is movably connected to the vehicle chassis in a non- tilted position of the cab 2.
  • the exemplified vehicle 1 is a heavy vehicle in the shape of a truck.
  • the vehicle 1 is fuelled by means of the liquefied gas fuel system I for operating the engine of the vehicle.
  • the vehicle 1 may be any suitable truck configured to be arranged with a load carrying part behind the cab 2.
  • Such a vehicle may be a truck arranged to carry an overhang behind the cab 2 or a semi-trailer truck comprising a towing truck and a semi-trailer coupled to the towing truck behind the cab 2 via a fifth wheel.
  • the cab 2 is tiltable between a non-tilted position, illustrated in fig. 1 a, in which the cab is upright and the vehicle may be driven, and a tilted position, illustrated in fig. 1 b.
  • the cab 2 is locked by means of a cab locking arrangement comprising cab locking members, not shown.
  • a locking arrangement is thus provided having a cab locking portion of the cab 2 and a chassis locking portion of the chassis 3 for locking the cab to the chassis in the non-tilted position of the cab.
  • the cab locking portion is connected to a cab body of the cab via a spring configuration for allowing movement of the cab body relative to the cab locking portion, not shown here.
  • the cab 2 may be tilted in any suitable way by any tiltable means.
  • the cab 2 is according to an embodiment tiltable by means of a cab tilting operation arrangement 50 shown in fig. 1 a.
  • the cab tilting operation arrangement 50 comprises a pump unit 52 and at least one hydraulic piston unit 54 for tilting the cab 2, hydraulically connected to the pump unit 52 via a hydraulic line.
  • the vehicle thus comprises a liquefied gas fuel system I.
  • the liquefied gas fuel system I comprises a chassis-mounted liquefied gas fuel tank 10 for providing fuel to the engine of the vehicle 1.
  • the liquefied gas fuel system I comprises a boil-off pipe 20 through which evaporated gas from the tank 10 is configured to be evacuated at a certain tank pressure.
  • the boil-off pipe 20 is configured to be connected to the fuel tank 10.
  • the liquefied gas fuel system I for liquefied gas is provided with a relief valve, not shown, which is set to open at the certain pressure for evacuating evaporated gas from the tank 10 via the boil-off pipe 20.
  • the pressure may be any suitable pressure.
  • the pressure is according to an embodiment about 16 bar. The pressure may depend on the size of the tank.
  • the vehicle 1 illustrated in fig. 1 a-b is a simplified illustration.
  • the vehicle chassis of the vehicle 1 normally comprises a vehicle frame comprising a left longitudinal vehicle beam and a right longitudinal vehicle beam, not shown.
  • the liquefied gas fuel tank 10 is arranged in connection to the vehicle frame.
  • the liquefied gas fuel tank 10 may according to an embodiment comprise a left liquefied gas fuel tank part arranged in connection to a left longitudinal vehicle beam and a right liquefied gas fuel tank part arranged in connection to the right longitudinal beam of the chassis of the vehicle 1.
  • the boil-off pipe 20 is attached to the rear side 2a of the cab 2.
  • the boil-off pipe 20 is arranged to be fixedly attached to the rear side of the cab 2 by means of any suitable fastening means, e.g. any suitable joints such as one or more screw joints, see fig. 2.
  • the boil-off pipe 20 is thus arranged to be tilted together with the cab 2 when the cab 2 is tilted to the tilted position.
  • the boil-off pipe 20 has an upper side 20a with an opening through which the evaporated gas is arranged to be evacuated and an opposing lower side for receiving evaporated gas from the tank 10.
  • the vehicle 1 comprises an arrangement A for facilitating evacuating evaporated liquefied gas of the liquefied gas fuel system I of the vehicle 1.
  • the boil-off pipe 20 is configured to be attached to the rear side of the cab 2.
  • the arrangement A is configured to allow evaporated gas from the tank 10 to be evacuated through the boil-off pipe 20 in the non-tilted position of the vehicle 1.
  • the arrangement A comprises a downwardly open conical configuration 30 as a lower end connection of the boil-off pipe 20.
  • the conical configuration has a tapered body 34 configured to taper from the lower opening 32 towards a lower portion 22 of the boil-off pipe 20.
  • the conical configuration 30 together with the boil-off pipe 20 is thus arranged to be tilted together with the cab 2 when the cab 2 is tilted to the tilted position.
  • the downwardly open conical configuration 30 as a lower end connection of the boil-off pipe 20 is thus arranged to move together with any cab movement comprising movement between tilted and non-tilted positon of the cab 2 and movements of the cab 2 relative to the chassis 3 in the non-tilted positon of the cab 2.
  • the conical configuration 30 is attached to an end portion 22 of the boil-off pipe 20.
  • the end portion 22 of the boil-off pipe 20 constituting the lower end portion of the boil-off pipe 20 when the boil-off pipe 20 is mounted to the rear side of the cab 2.
  • the conical configuration 30 constitutes a separate part configured to be attached to the lower end portion of the boil-off pipe 20.
  • a pipe portion constituting an end portion 22 of the boil-off pipe and the conical configuration 30 constitute an integrated portion configured to be attached to a lower end of the boil-off pipe 20.
  • the conical configuration 30 and a pipe portion 22 integrated with the conical configuration 30 are attached to the boil-off pipe 20 via the pipe portion 22 so that the pipe portion 22 integrated with the conical configuration 30 when attached to the boil-off pipe 20 constitute a part of the boil-off pipe 20.
  • the conical configuration 30 constitutes an integrated portion of the boil-off pipe 20.
  • the conical configuration 30 constitutes the lowest end portion of the boil-off pipe 20, when the boil-off pipe is mounted to the rear side of the cab 2.
  • the conical configuration 30 transfers into the lower pipe portion 22.
  • the arrangement A further comprises a tank pipe member 40 attached to the tank 10 for conveying evaporated gas from the tank 10.
  • the tank pipe member 40 is attached to the tank 10 for conveying evaporated gas from the tank 10.
  • the tank pipe member 40 may be connected to the tank 10 in any suitable way.
  • the tank pipe member may be any suitable pipe or hose or a combination thereof.
  • the tank pipe member 40 may be connected to the chassis 1 of the vehicle 1 , see fig. 2.
  • At least a portion of the tank pipe member 40 comprising the portion 42 has a certain rigidity so as to prevent or at least reduce/minimize movement of the portion 42.
  • the portion 42 of the tank pipe member 40 has a certain stiffness.
  • the certain stiffness of the portion 42 of the tank pipe member 40 is obtained by introducing a rigid pipe into the portion 42.
  • the conical configuration 30 and the tank pipe member 40 are configured so that, when the cab is moved from the tilted position, illustrated in fig.
  • a portion 42 of the tank pipe member 40 is introduced into the conical configuration 30 and further into the boil-off pipe 20 above the conical configuration 30 so that gas evaporated from the tank 10 is introduced into and evacuated through the boil-off pipe 20 via the tank pipe member 40.
  • the portion 42 of the tank pipe member 40 is thus introduced into the conical configuration 30 and further into the lower portion 22 of the boil-off pipe 20.
  • the conical configuration 30 and tank pipe member 40 are configured so that, in the non-tilted position, during cab and thus conical configuration movement, the conical configuration 30 is allowed to move relative to the portion 42 of the tank pipe member introduced into the boil-off pipe above the conical configuration.
  • the lower portion 22 of the boil-off pipe is allowed to move relative to the portion 42 of the tank pipe member 40 introduced into the lower portion 22 of the boil-off pipe above the conical configuration 30.
  • the conical configuration 30 is thus allowed to move relatively freely relative to the portion 42 of the tank pipe member 40 positioned in the conical configuration 30 in the direction of the boil-off pipe 20, i.e. normally vertical direction.
  • the boil-off pipe 20, i.e. the lower portion 22 of the boil-off pipe 20, and the portion 42 of the tank pipe member 40 in the boil-off pipe 20 are dimensioned to promote an ejector effect for facilitating evacuation of the gas through the boil-off pipe 20, see fig. 3 and fig. 4.
  • Fig. 2 schematically illustrates a perspective view of a boil-off pipe 20 and tank pipe member 40 of the liquefied gas fuel system and the arrangement A for facilitating evacuating evaporated liquefied gas of the liquefied gas fuel system for a non-tilted position according to an embodiment of the present disclosure.
  • the boil-off pipe 20 is configured to be attached to the rear side of the cab of the vehicle, not shown here.
  • the boil-off pipe 20 is arranged to be fixedly attached to the rear side of the cab by means of any suitable fastening means.
  • the fastening means comprises an upper fastening arrangement F1 , an intermediate fastening arrangement F2 and a lower fastening arrangement F3.
  • the upper fastening arrangement F1 is configured to provide an attachment of the boil-off pipe 20 to the rear side of the cab in connection to an upper portion of the boil-off pipe 20.
  • the intermediate fastening arrangement F2 is configured to provide an attachment of the boil-off pipe 20 to the rear side of the cab in connection to an intermediate portion of the boil-off pipe 20.
  • the lower fastening arrangement F3 is configured to provide an attachment of the boil-off pipe 20 to the rear side of the cab in connection to a lower portion of the boil-off pipe 20.
  • the boil-off pipe 20 has an upper side 20a with an opening through which the evaporated gas is arranged to be evacuated and an opposing lower side for receiving evaporated gas from the tank via the tank pipe member 40.
  • the tank pipe member 40 i.e. the portion 42 of the tank pipe member which has been introduced into the conical configuration and further to the lower portion 22 of the boil-off pipe, has an upper end side 40a through which the evaporated gas is arranged to be evacuated into the boil-off pipe 20 for evacuation through the boil-off pipe 20.
  • the tank pipe member 40 has an opposing end 40b configured to be connected to the liquefied gas fuel tank.
  • the tank pipe member 40 is configured to be attached to the vehicle chassis, not shown here.
  • the tank pipe member 40 is arranged to be fixedly attached to the vehicle chassis, directly or via any suitable member fixed to the vehicle chassis, by means of any suitable fastening means.
  • the fastening means comprises a tank pipe member fastening arrangement F4.
  • the tank pipe member fastening arrangement F4 is configured to attach the tank pipe member 40 relatively close to the portion 42 of the tank pipe member 40 so as to minimize movement of the portion 42 of the tank pipe member 40.
  • the portion 42 of the tank pipe member 40 has a certain rigidity so as to prevent or at least reduce/minimize movement of the portion 42 so that the portion 42 of the tank pipe member 40 is securely introduced into the lower portion 32 of the conical configuration 30 and further into the boil-off pipe 20 when the cab is moved from the tilted to the non-tilted position.
  • At least a portion of the portion 44 of the tank pipe member 40 running from the tank pipe member fastening arrangement F4 and the upper end side 40a is flexible so as to allow cab movements and thus movements of the boil-off pipe and conical configuration relative to the vehicle chassis with the portion 42 of the tank pipe member 40 introduced into the boil-off pipe 20.
  • the tank pipe member fastening arrangement F4 suspendedly arranged in connection to the vehicle chassis so as to allow cab movements and thus movements of the boil-off pipe and conical configuration relative to the vehicle chassis with the portion 42 of the tank pipe member 40 introduced into the boil-off pipe 20.
  • the portion 44 of the tank pipe member 40 running from the tank pipe member fastening arrangement F4 and into the lower portion 22 of the boil-off pipe 20 may be essentially rigid.
  • the tank pipe member fastening arrangement F4 may comprise any suitable spring arrangement for allowing relative movement of the tank pipe member 40 relative to the vehicle chassis.
  • Fig. 3 schematically illustrates a side view of an arrangement A for facilitating evacuating evaporated liquefied gas of a liquefied gas fuel system of a vehicle according to an embodiment of the present disclosure.
  • fig. 3 schematically illustrates a side view of the arrangement A in fig. 1 a with a conical configuration 30, a lower portion 22 of the boil-off pipe 20 and a portion 42 of the tank pipe member 40 introduced into the conical configuration 30 and the lower portion 22 of the boil-off pipe according to an embodiment of the present disclosure.
  • the conical configuration 30 has a tapered body 34 configured to taper from the lower opening 32 towards a lower portion 22 of the boil-off pipe 20 so as to facilitate guiding the portion 42 of the tank pipe member 40 into the lower portion 22 of the boil-off pipe 20.
  • the lower opening 32 of the conical configuration 30 has a diameter D1.
  • the diameter D1 is the inner diameter of the opening 32 of the conical configuration 30.
  • the lower portion 22 of the boil-off pipe 20 has an inner diameter D2 which is shorter than the inner diameter D1 of the lower opening portion 32 of the conical configuration 30.
  • the tank pipe member 40 i.e. the portion 42 of the tank pipe member 40 configured to be introduced into the lower opening 32 of the conical configuration 30 has a diameter D3.
  • the diameter D3 of the portion 42 of tank pipe member 40 is the outer diameter.
  • the outer diameter D3 of the portion 42 is substantially shorter than the inner diameter D1 of the lower opening 32 so that the size of the bottom opening 32 of the conical configuration 30 is sufficiently large for allowing the portion 42 of the tank pipe member to be introduced into the lower opening 32 of the conical configuration 30 independent of certain movement of the cab and thus conical configuration 30 relative to the chassis and thus tank pipe member 40 and certain movement of the introduction portion 42 of the tank pipe member relative to the conical configuration 30.
  • the outer diameter D3 of the portion 42 is shorter than the inner diameter D2 of the lower portion 22 of the boil-off pipe 20 so as to allow movement of the boil-off pipe in the vertical direction relative to the portion 42 introduced into the boil-off pipe 20.
  • the portion 42 of the tank pipe member 40 is configured to be sufficiently introduced into the boil-off pipe 20 so that the end portion 40a of the portion 42 remains in the boil-off pipe 20 independent of cab and thus boil-off pipe movements. According to this embodiment of the arrangement A the lower portion 22 of the boil-off pipe 20 and the portion 42 of the tank pipe member 40 in the boil-off pipe 20 are dimensioned to promote an ejector effect for facilitating evacuation of the gas through the boil-off pipe 20.
  • the inner diameter D2 of the lower portion 22 of the boil-off pipe 20 and the outer diameter D3 of the portion 42 of the tank pipe member 40 are dimensioned such that a space between the outer surface of the pipe portion 42 and the inner surface of the lower portion 22 of the boil-off pipe 20 is created for allowing air to pass.
  • the lower portion 22 of the boil-off pipe 20 and the portion 42 of the tank pipe member 40 in the boil-off pipe 20 are dimensioned such that an air gap is created there between for promoting the ejector effect.
  • Fig. 4 schematically illustrates a perspective view of an arrangement A for facilitating evacuating evaporated liquefied gas of a liquefied gas fuel system of a vehicle according of an embodiment of the present disclosure.
  • fig. 3 schematically illustrates a perspective view of the arrangement A in fig. 1 a with a conical configuration 30, a lower portion 22 of the boil-off pipe 20 and a portion 42 of the tank pipe member 40 introduced into the conical configuration 30 and the lower portion 22 of the boil-off pipe according to an embodiment of the present disclosure.
  • the conical configuration 30 has a tapered body 34 configured to taper from the lower opening 32 towards a lower portion 22 of the boil-off pipe 20 so as to facilitate guiding the portion 42 of the tank pipe member 40 into the lower portion 22 of the boil-off pipe 20.
  • the embodiment according to fig. 4 differs from the embodiment according to fig. 3 in that the lower end portion 22 of the boil-off pipe 20 above the conical configuration 30 and below the upper end 40a of the end portion 42 of the tank pipe member 40 introduced into the boil-off pipe 20 comprises a waist configuration 22A for promoting an ejector effect for facilitating evacuation of the gas through the boil-off pipe.
  • the lower end portion 22 of the boil-off pipe 20 thus, according to this embodiment, comprises a waist configuration 22A having an inner diameter D2a at its shortest position and cylindrical portion 22B running from the waist configuration 22A towards the upper side of the boil-off pipe and having an inner diameter D2b.
  • the inner diameter D2a of the waist configuration 22A is shorter than the inner diameter D2b of the cylindrical portion 22B of the lower portion 22 of the boil off-pipe 20.
  • the lower opening 32 of the conical configuration 30 has an inner diameter D1.
  • the inner diameter D2a of the waist configuration 22A and thus the inner diameter D2b of the cylindrical portion 22B are shorter than the inner diameter D1 of the lower opening portion 32 of the conical configuration 30.
  • the portion 42 of the tank pipe member 40 configured to be introduced into the lower opening 32 of the conical configuration 30 has an outer diameter D3.
  • the inner diameter D2a of the waist configuration 22A and thus the inner diameter D2b of the cylindrical portion 22B are shorter than the outer diameter D3 of the portion 42 of the tank pipe member 40 so as to allow movement of the boil-off pipe in the vertical direction relative to the portion 42 introduced into the boil-off pipe 20.
  • the portion 42 of the tank pipe member 40 is configured to be sufficiently introduced into the boil-off pipe 20 so that the end portion 40a of the portion 42 remains in the boil-off pipe 20 independent of cab and thus boil-off pipe movements.
  • the waist configuration 22A of the lower portion 22 of the boil-off pipe 20 and the portion 42 of the tank pipe member 40 in the boil-off pipe 20 are dimensioned to promote an ejector effect for facilitating evacuation of the gas through the boil-off pipe 20.
  • the inner diameter D2a of the waist configuration 22A of the lower portion 22 of the boil-off pipe 20 and the outer diameter D3 of the portion 42 of the tank pipe member 40 are dimensioned such that a space between the outer surface of the pipe portion 42 and the inner surface of the waist configuration 22A of the lower portion 22 of the boil-off pipe 20 is created for allowing air to pass.
  • the waist configuration 22A of the lower portion 22 of the boil-off pipe 20 and the portion 42 of the tank pipe member 40 in the boil-off pipe 20 are dimensioned such that an air gap is created there between for promoting the ejector effect.
  • the portion 42 of the tank pipe member 40 has an inner diameter D4.
  • the thickness of the portion 42 i.e. the difference between inner outer diameter D3 and inner diameter D4 is adapted to optimize the ejector effect.
  • the lower portion of the boil-off pipe and the portion of the tank pipe member introduced into the conical configuration and further into the lower portion of the boil-off pipe have a circular cross sections so as to allow the introduction of the portion of the tank pipe member and relative movements between the lower portion of the boil-off pipe and the portion of the tank pipe member in their longitudinal extensions.
  • the lower portion of the boil-off pipe and the portion of the tank pipe member introduced into the conical configuration and further into the lower portion of the boil-off may have any suitable cross sections for allowing the introduction of the portion of the tank pipe member and relative movements between the lower portion of the boil-off pipe and the portion of the tank pipe member in their longitudinal extensions.

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  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

The present invention relates to an arrangement (A) for facilitating evacuating evaporated liquefied gas of a liquefied gas fuel system of a vehicle (1). The vehicle (1) has a tiltable cab (2) being movably connected to the vehicle chassis (3) in a non-tilted position. The fuel system has a chassis-mounted tank (10) for providing fuel to the engine of the vehicle (1), and a cab-mounted boil-off pipe (20). The arrangement (A) is configured to allow evaporated gas from the tank (10) to be evacuated through the boil-off pipe (20) in the non- tilted position. The arrangement (A) comprises a downwardly open conical configuration (30) as a lower end connection of the boil-off pipe (20) and a tank pipe member (40) attached to the tank (10) for conveying evaporated gas from the tank (10). The conical configuration (30) and tank pipe member (40) are configured so that, when the cab is moved from the tilted to the non-tilted position, a portion (42) of the tank pipe member (40) is introduced into the conical configuration (30) and further into the boil-off pipe above the conical configuration (30) so that gas evaporated from the tank (10) is introduced into and evacuated through the boil-off pipe (20) via the tank pipe member (40). The present invention also relates to a vehicle.

Description

AN ARRANGEMENT FOR FACILITATING EVACUATING EVAPORATED LIQUEFIED GAS OF A LIQUEFIED GAS FUEL SYSTEM OF A VEHICLE
TECHNICAL FIELD The invention relates to an arrangement for facilitating evacuating evaporated liquefied gas of a liquefied gas fuel system of a vehicle The invention also relates to a vehicle.
BACKGROUND ART Alternative fuels such as natural gas and biogas are being introduced in vehicles such as heavy vehicles. For this purpose fuel systems for compressed natural gas, CNG and compressed biogas CBG and fuel systems for liquefied natural gas LNG and liquefied biogas LBG are being developed.
Systems for liquefied gas, i.e. LNG and LBG, require handling of relatively low temperatures, e.g. -130 degree Celsius at 10 bar for LNG, requiring certain conduits for transporting the liquefied natural gas and a certain tank for housing the fuel. When the vehicle is standing still and the engine is not operating the pressure in the tank will increase due to temperature increase in the tank. Therefore the system for liquefied gas is provided with a relief valve which according to an embodiment is set to open at 16 bar for evacuating evaporated gas.
The fuel tank/tanks for liquefied gas systems are usually arranged along and in connection to the vehicle frame. The evaporated gas is configured to be evacuated via a so called boil-off pipe connected to the fuel tank. The gas needs to be evacuated at a certain height. The boil-off pipe is further not allowed to project laterally or upwardly from the vehicle. For trucks the boil-off pipe is therefore usually arranged behind the cab of the truck. For trucks having a tiltable cab, i.e. cabs arranged to be tilted forwardly, the boil-off pipe is according to a variant arranged to be connected to a vertical member arranged in connection to and at a distance from the rear side of the cab to avoid influence from the tilting.
Such a solution, however, takes up space behind the cab which otherwise could be used for overhang or semi-trailer in order to optimize the length of the load carrying part of the vehicle.
Therefor it is desired to attach the boil-off pipe to the rear side of the cab. By thus arranging the boil-off pipe to the rear side of a tiltable cab an arrangement for facilitating evacuating evaporated liquefied gas of the liquefied gas fuel system taking the fact that the boil-off pipe is moved relative to the tank when the cab is tilted.
Arrangements for facilitating automatic connection between cab mounted boil- off pipe and chassis mounted tank when cab is moved from tilted to non-tilted positon are known.
There is however a need to provide an arrangement for further facilitating evacuating evaporated liquefied gas of a liquefied gas fuel system of a vehicle having a tiltable cab.
OBJECTS OF THE INVENTION
An object of the present disclosure is to provide an arrangement for facilitating evacuating evaporated liquefied gas of a liquefied gas fuel system of a vehicle.
Another object of the present invention is to provide a vehicle comprising such an arrangement. SUMMARY OF THE INVENTION
These and other objects, apparent from the following description, are achieved by an arrangement and a vehicle as set out in the appended independent claims. Preferred embodiments of the arrangement are defined in appended dependent claims.
Specifically an object of the invention is achieved by an arrangement for facilitating evacuating evaporated liquefied gas of a liquefied gas fuel system of a vehicle. The vehicle has a tiltable cab and a vehicle chassis, the cab being movably connected to the vehicle chassis in a non-tilted position of the cab. The fuel system has a chassis-mounted liquefied gas fuel tank for providing fuel to the engine of the vehicle, and a boil-off pipe. Evaporated gas is arranged to be evacuated from the tank via the boil-off pipe at a certain tank pressure. The boil-off pipe is attached to the rear side of the cab. The arrangement is configured to allow evaporated gas from the tank to be evacuated through the boil-off pipe in the non-tilted position. The arrangement comprises a downwardly open conical configuration as a lower end connection of the boil- off pipe and a tank pipe member attached to the tank for conveying evaporated gas from the tank. The conical configuration and tank pipe member are configured so that, when the cab is moved from the tilted to the non-tilted position, a portion of the tank pipe member is introduced into the conical configuration and further into the boil-off pipe above the conical configuration so that gas evaporated from the tank is introduced into and evacuated through the boil-off pipe via the tank pipe member.
Hereby the cab-mounted boil-off pipe and the chassis-mounted liquefied gas fuel tank may, when the cab is moved from a tilted to a non-tilted position, easily and automatically be brought into a position in which gas evaporated from the tank is evacuated through the boil-off pipe. The solution with the downwardly open conical configuration as a lower end connection of the boil- off pipe configured to receive a tank pipe member makes it easy to design the size of the bottom opening of the conical configuration sufficiently large for allowing the tank pipe member to be introduced into the lower opening of the conical configuration independent of certain movement of the cab and thus conical configuration relative to the chassis and thus tank pipe member and certain movement of the introduction portion of the tank pipe member relative to the conical configuration. By thus providing a downwardly open conical configuration as a lower end connection of the boil-off pipe adapted to receive the tank pipe member and direct the portion of the tank pipe member so that it is introduced further into the boil-off pipe above the conical configuration an ejector effect is obtained, reducing the risk of gas evaporated from the tank and evacuated from the portion of the tank pipe member flowing backwards in the space between the portion of the tank pipe member and the boil-off pipe towards the opening of the conical configuration. Thus the solution functions as a diffuser. Hereby a relatively simple and cost efficient design for facilitating evacuating evaporated liquefied gas of a liquefied gas fuel system of a vehicle from the chassis-mounted liquefied gas fuel tank through the cab-mounted boil-off pipe.
According to an embodiment of the arrangement the conical configuration and tank pipe member are configured so that, in the non-tilted position, during cab and thus conical configuration movement, the conical configuration is allowed to move relative to the portion of the tank pipe member introduced into the boil- off pipe above the conical configuration. Hereby risk of fatigue and wear in connection to cab movements in the non-tilted position of the cab may be reduced.
According to an embodiment of the arrangement the boil-off pipe and the portion of the tank member in the boil-off pipe are dimensioned to promote an ejector effect for facilitating evacuation of the gas through the boil-off pipe. Hereby the risk of the gas evaporated from the tank and evacuated from the portion of the tank pipe member flowing backwards in the space between the portion of the tank pipe member and the boil-off pipe towards the opening of the conical configuration is reduced. According to an embodiment of the arrangement the lower end portion of the boil-off pipe above the conical configuration and below the upper end of the end portion of the tank pipe member introduced into the boil-off pipe comprises a waist configuration for promoting an ejector effect for facilitating evacuation of the gas through the boil-off pipe. Hereby the risk of the gas evaporated from the tank and evacuated from the portion of the tank pipe member flowing backwards in the space between the portion of the tank pipe member and the boil-off pipe towards the opening of the conical configuration is further reduced.
Specifically an object of the invention is achieved by a vehicle comprising an arrangement as set out herein.
BRIEF DESCRIPTION OF THE DRAWINGS
For a better understanding of the present disclosure reference is made to the following detailed description when read in conjunction with the accompanying drawings, wherein like reference characters refer to like parts throughout the several views, and in which:
Fig. 1 a schematically illustrates a side view of a vehicle with a tiltable cab in a non-tilted position, the vehicle having an arrangement for facilitating evacuating evaporated liquefied gas of a liquefied gas fuel system of a vehicle according to an embodiment of the present disclosure;
Fig. 1 b schematically illustrates a side view of the vehicle in fig. 1 a with the cab in a tilted position;
Fig. 2 schematically illustrates a perspective view of boil-off pipe and tank pipe member of the liquefied gas fuel system and the arrangement for facilitating evacuating evaporated liquefied gas of the liquefied gas fuel system for a non- tilted position according to an embodiment of the present disclosure; Fig. 3 schematically illustrates a side view of an arrangement for facilitating evacuating evaporated liquefied gas of a liquefied gas fuel system of a vehicle according to an embodiment of the present disclosure; and
Fig. 4 schematically illustrates a perspective view of an arrangement for facilitating evacuating evaporated liquefied gas of a liquefied gas fuel system of a vehicle according of an embodiment of the present disclosure.
DETAILED DESCRIPTION
Hereinafter the term“liquefied gas” refers to liquefied natural gas, LNG, or liquefied biogas, LBG.
Hereinafter the term“liquefied gas fuel system” refers to a fuel system for liquefied natural gas, LNG, or a fuel system for liquefied biogas, LBG.
Hereinafter the term“flexible hose” refers to hoses configured to transport fluid for a liquefied gas fuel system, the hose being bendable to a certain degree and having a certain flexibility so as to facilitate taking up relative movements of a vehicle cab relative to a liquefied gas fuel tank.
Hereinafter the term“boil-off pipe” refers to a pipe, preferably a rigid pipe, configured to evacuate evaporated gas from a liquefied gas fuel tank of a liquefied gas fuel system. The pipe is according to an embodiment made of stainless steel. The boil-off pipe could alternatively be flexible such as a flexible hose. The boil-off pipe may have any suitable cross section comprising circular cross section or other polygonal cross section such as e.g. square cross section.
Hereinafter the term“tank pipe member” refers to any suitable pipe or hose or a combination thereof. The tank pipe member may have any suitable cross section comprising circular cross section or other polygonal cross section such as e.g. square cross section. Fig. 1 a schematically illustrates a side view of a vehicle 1 with a tiltable cab 2 in a non-tilted position; and fig. 1 b schematically illustrates a side view of the vehicle 1 in fig. 1 a with the cab 2 in a tilted position.
The vehicle has an arrangement A for facilitating evacuating evaporated liquefied gas of a liquefied gas fuel system I of a vehicle according to an embodiment of the present disclosure.
The vehicle 1 has a vehicle chassis 3. The cab 2 is tiltable relative to the vehicle chassis 3. The cab 2 is movably connected to the vehicle chassis in a non- tilted position of the cab 2. The exemplified vehicle 1 is a heavy vehicle in the shape of a truck. The vehicle 1 is fuelled by means of the liquefied gas fuel system I for operating the engine of the vehicle. The vehicle 1 may be any suitable truck configured to be arranged with a load carrying part behind the cab 2. Such a vehicle may be a truck arranged to carry an overhang behind the cab 2 or a semi-trailer truck comprising a towing truck and a semi-trailer coupled to the towing truck behind the cab 2 via a fifth wheel.
The cab 2 is tiltable between a non-tilted position, illustrated in fig. 1 a, in which the cab is upright and the vehicle may be driven, and a tilted position, illustrated in fig. 1 b. In the non-tilted position, the cab 2 is locked by means of a cab locking arrangement comprising cab locking members, not shown. A locking arrangement is thus provided having a cab locking portion of the cab 2 and a chassis locking portion of the chassis 3 for locking the cab to the chassis in the non-tilted position of the cab. The cab locking portion is connected to a cab body of the cab via a spring configuration for allowing movement of the cab body relative to the cab locking portion, not shown here.
The cab 2 may be tilted in any suitable way by any tiltable means. The cab 2 is according to an embodiment tiltable by means of a cab tilting operation arrangement 50 shown in fig. 1 a. The cab tilting operation arrangement 50 comprises a pump unit 52 and at least one hydraulic piston unit 54 for tilting the cab 2, hydraulically connected to the pump unit 52 via a hydraulic line.
The vehicle thus comprises a liquefied gas fuel system I. The liquefied gas fuel system I comprises a chassis-mounted liquefied gas fuel tank 10 for providing fuel to the engine of the vehicle 1.
The liquefied gas fuel system I comprises a boil-off pipe 20 through which evaporated gas from the tank 10 is configured to be evacuated at a certain tank pressure. The boil-off pipe 20 is configured to be connected to the fuel tank 10. The liquefied gas fuel system I for liquefied gas is provided with a relief valve, not shown, which is set to open at the certain pressure for evacuating evaporated gas from the tank 10 via the boil-off pipe 20. The pressure may be any suitable pressure. The pressure is according to an embodiment about 16 bar. The pressure may depend on the size of the tank.
The vehicle 1 illustrated in fig. 1 a-b is a simplified illustration. The vehicle chassis of the vehicle 1 normally comprises a vehicle frame comprising a left longitudinal vehicle beam and a right longitudinal vehicle beam, not shown. The liquefied gas fuel tank 10 is arranged in connection to the vehicle frame. The liquefied gas fuel tank 10 may according to an embodiment comprise a left liquefied gas fuel tank part arranged in connection to a left longitudinal vehicle beam and a right liquefied gas fuel tank part arranged in connection to the right longitudinal beam of the chassis of the vehicle 1.
The boil-off pipe 20 is attached to the rear side 2a of the cab 2. The boil-off pipe 20 is arranged to be fixedly attached to the rear side of the cab 2 by means of any suitable fastening means, e.g. any suitable joints such as one or more screw joints, see fig. 2. The boil-off pipe 20 is thus arranged to be tilted together with the cab 2 when the cab 2 is tilted to the tilted position.
The boil-off pipe 20 has an upper side 20a with an opening through which the evaporated gas is arranged to be evacuated and an opposing lower side for receiving evaporated gas from the tank 10. The vehicle 1 comprises an arrangement A for facilitating evacuating evaporated liquefied gas of the liquefied gas fuel system I of the vehicle 1. The boil-off pipe 20 is configured to be attached to the rear side of the cab 2.
The arrangement A is configured to allow evaporated gas from the tank 10 to be evacuated through the boil-off pipe 20 in the non-tilted position of the vehicle 1.
The arrangement A comprises a downwardly open conical configuration 30 as a lower end connection of the boil-off pipe 20. According to an embodiment of the arrangement the conical configuration has a tapered body 34 configured to taper from the lower opening 32 towards a lower portion 22 of the boil-off pipe 20.
The conical configuration 30 together with the boil-off pipe 20 is thus arranged to be tilted together with the cab 2 when the cab 2 is tilted to the tilted position. The downwardly open conical configuration 30 as a lower end connection of the boil-off pipe 20 is thus arranged to move together with any cab movement comprising movement between tilted and non-tilted positon of the cab 2 and movements of the cab 2 relative to the chassis 3 in the non-tilted positon of the cab 2.
According to an embodiment the conical configuration 30 is attached to an end portion 22 of the boil-off pipe 20. The end portion 22 of the boil-off pipe 20 constituting the lower end portion of the boil-off pipe 20 when the boil-off pipe 20 is mounted to the rear side of the cab 2. Thus, in that embodiment the conical configuration 30 constitutes a separate part configured to be attached to the lower end portion of the boil-off pipe 20. According to an embodiment a pipe portion constituting an end portion 22 of the boil-off pipe and the conical configuration 30 constitute an integrated portion configured to be attached to a lower end of the boil-off pipe 20. In this embodiment the conical configuration 30 and a pipe portion 22 integrated with the conical configuration 30 are attached to the boil-off pipe 20 via the pipe portion 22 so that the pipe portion 22 integrated with the conical configuration 30 when attached to the boil-off pipe 20 constitute a part of the boil-off pipe 20.
According to an alternative embodiment the conical configuration 30 constitutes an integrated portion of the boil-off pipe 20. Thus, in that embodiment the conical configuration 30 constitutes the lowest end portion of the boil-off pipe 20, when the boil-off pipe is mounted to the rear side of the cab 2. Thus, in that embodiment the conical configuration 30 transfers into the lower pipe portion 22.
The arrangement A further comprises a tank pipe member 40 attached to the tank 10 for conveying evaporated gas from the tank 10. The tank pipe member
40 may be connected to the tank 10 in any suitable way. The tank pipe member may be any suitable pipe or hose or a combination thereof. The tank pipe member 40 may be connected to the chassis 1 of the vehicle 1 , see fig. 2. At least a portion of the tank pipe member 40 comprising the portion 42 has a certain rigidity so as to prevent or at least reduce/minimize movement of the portion 42. Thus, the portion 42 of the tank pipe member 40 has a certain stiffness. According to an embodiment of the disclosure the certain stiffness of the portion 42 of the tank pipe member 40 is obtained by introducing a rigid pipe into the portion 42. The conical configuration 30 and the tank pipe member 40 are configured so that, when the cab is moved from the tilted position, illustrated in fig. 1 b, to the non-tilted position, illustrated in fig. 1 a, a portion 42 of the tank pipe member 40 is introduced into the conical configuration 30 and further into the boil-off pipe 20 above the conical configuration 30 so that gas evaporated from the tank 10 is introduced into and evacuated through the boil-off pipe 20 via the tank pipe member 40. The portion 42 of the tank pipe member 40 is thus introduced into the conical configuration 30 and further into the lower portion 22 of the boil-off pipe 20. According to an embodiment of the arrangement A the conical configuration 30 and tank pipe member 40 are configured so that, in the non-tilted position, during cab and thus conical configuration movement, the conical configuration 30 is allowed to move relative to the portion 42 of the tank pipe member introduced into the boil-off pipe above the conical configuration.
Thus, in the non-tilted position, during cab and thus boil-off pipe and conical configuration movement, the lower portion 22 of the boil-off pipe is allowed to move relative to the portion 42 of the tank pipe member 40 introduced into the lower portion 22 of the boil-off pipe above the conical configuration 30. The conical configuration 30 is thus allowed to move relatively freely relative to the portion 42 of the tank pipe member 40 positioned in the conical configuration 30 in the direction of the boil-off pipe 20, i.e. normally vertical direction.
According to an embodiment of the arrangement A the boil-off pipe 20, i.e. the lower portion 22 of the boil-off pipe 20, and the portion 42 of the tank pipe member 40 in the boil-off pipe 20 are dimensioned to promote an ejector effect for facilitating evacuation of the gas through the boil-off pipe 20, see fig. 3 and fig. 4.
Fig. 2 schematically illustrates a perspective view of a boil-off pipe 20 and tank pipe member 40 of the liquefied gas fuel system and the arrangement A for facilitating evacuating evaporated liquefied gas of the liquefied gas fuel system for a non-tilted position according to an embodiment of the present disclosure.
As illustrated in fig. 1 a-b, the boil-off pipe 20 is configured to be attached to the rear side of the cab of the vehicle, not shown here. The boil-off pipe 20 is arranged to be fixedly attached to the rear side of the cab by means of any suitable fastening means. According to this embodiment the fastening means comprises an upper fastening arrangement F1 , an intermediate fastening arrangement F2 and a lower fastening arrangement F3. The upper fastening arrangement F1 is configured to provide an attachment of the boil-off pipe 20 to the rear side of the cab in connection to an upper portion of the boil-off pipe 20. The intermediate fastening arrangement F2 is configured to provide an attachment of the boil-off pipe 20 to the rear side of the cab in connection to an intermediate portion of the boil-off pipe 20. The lower fastening arrangement F3 is configured to provide an attachment of the boil-off pipe 20 to the rear side of the cab in connection to a lower portion of the boil-off pipe 20.
The boil-off pipe 20 has an upper side 20a with an opening through which the evaporated gas is arranged to be evacuated and an opposing lower side for receiving evaporated gas from the tank via the tank pipe member 40.
The tank pipe member 40, i.e. the portion 42 of the tank pipe member which has been introduced into the conical configuration and further to the lower portion 22 of the boil-off pipe, has an upper end side 40a through which the evaporated gas is arranged to be evacuated into the boil-off pipe 20 for evacuation through the boil-off pipe 20. The tank pipe member 40 has an opposing end 40b configured to be connected to the liquefied gas fuel tank.
As illustrated in fig. 2, the tank pipe member 40 is configured to be attached to the vehicle chassis, not shown here. The tank pipe member 40 is arranged to be fixedly attached to the vehicle chassis, directly or via any suitable member fixed to the vehicle chassis, by means of any suitable fastening means. According to this embodiment the fastening means comprises a tank pipe member fastening arrangement F4. The tank pipe member fastening arrangement F4 is configured to attach the tank pipe member 40 relatively close to the portion 42 of the tank pipe member 40 so as to minimize movement of the portion 42 of the tank pipe member 40. Flereby it is facilitated to keep the portion 42 of the tank pipe member 40 straight and directed such that it is securely introduced into the lower opening 32 of the conical configuration 30 and further into the lower portion 22 of the boil-off pipe 20 when the cab is moved from the tilted to the non-tilted position. As mentioned above, at least a portion of the tank pipe member 40 comprising the portion 42 has a certain rigidity so as to prevent or at least reduce/minimize movement of the portion 42 so that the portion 42 of the tank pipe member 40 is securely introduced into the lower portion 32 of the conical configuration 30 and further into the boil-off pipe 20 when the cab is moved from the tilted to the non-tilted position.
According to an embodiment at least a portion of the portion 44 of the tank pipe member 40 running from the tank pipe member fastening arrangement F4 and the upper end side 40a is flexible so as to allow cab movements and thus movements of the boil-off pipe and conical configuration relative to the vehicle chassis with the portion 42 of the tank pipe member 40 introduced into the boil-off pipe 20.
According to an embodiment the tank pipe member fastening arrangement F4 suspendedly arranged in connection to the vehicle chassis so as to allow cab movements and thus movements of the boil-off pipe and conical configuration relative to the vehicle chassis with the portion 42 of the tank pipe member 40 introduced into the boil-off pipe 20. Flereby the portion 44 of the tank pipe member 40 running from the tank pipe member fastening arrangement F4 and into the lower portion 22 of the boil-off pipe 20 may be essentially rigid. The tank pipe member fastening arrangement F4 may comprise any suitable spring arrangement for allowing relative movement of the tank pipe member 40 relative to the vehicle chassis.
Fig. 3 schematically illustrates a side view of an arrangement A for facilitating evacuating evaporated liquefied gas of a liquefied gas fuel system of a vehicle according to an embodiment of the present disclosure.
More specifically, fig. 3 schematically illustrates a side view of the arrangement A in fig. 1 a with a conical configuration 30, a lower portion 22 of the boil-off pipe 20 and a portion 42 of the tank pipe member 40 introduced into the conical configuration 30 and the lower portion 22 of the boil-off pipe according to an embodiment of the present disclosure.
The portion 42 of the tank pipe member 40 has thus been introduced into the lower opening 32 of the conical configuration 30. According to this embodiment the conical configuration 30 has a tapered body 34 configured to taper from the lower opening 32 towards a lower portion 22 of the boil-off pipe 20 so as to facilitate guiding the portion 42 of the tank pipe member 40 into the lower portion 22 of the boil-off pipe 20.
The lower opening 32 of the conical configuration 30 has a diameter D1. The diameter D1 is the inner diameter of the opening 32 of the conical configuration 30. The lower portion 22 of the boil-off pipe 20 has an inner diameter D2 which is shorter than the inner diameter D1 of the lower opening portion 32 of the conical configuration 30.
The tank pipe member 40, i.e. the portion 42 of the tank pipe member 40 configured to be introduced into the lower opening 32 of the conical configuration 30 has a diameter D3. The diameter D3 of the portion 42 of tank pipe member 40 is the outer diameter.
The outer diameter D3 of the portion 42 is substantially shorter than the inner diameter D1 of the lower opening 32 so that the size of the bottom opening 32 of the conical configuration 30 is sufficiently large for allowing the portion 42 of the tank pipe member to be introduced into the lower opening 32 of the conical configuration 30 independent of certain movement of the cab and thus conical configuration 30 relative to the chassis and thus tank pipe member 40 and certain movement of the introduction portion 42 of the tank pipe member relative to the conical configuration 30.
The outer diameter D3 of the portion 42 is shorter than the inner diameter D2 of the lower portion 22 of the boil-off pipe 20 so as to allow movement of the boil-off pipe in the vertical direction relative to the portion 42 introduced into the boil-off pipe 20. The portion 42 of the tank pipe member 40 is configured to be sufficiently introduced into the boil-off pipe 20 so that the end portion 40a of the portion 42 remains in the boil-off pipe 20 independent of cab and thus boil-off pipe movements. According to this embodiment of the arrangement A the lower portion 22 of the boil-off pipe 20 and the portion 42 of the tank pipe member 40 in the boil-off pipe 20 are dimensioned to promote an ejector effect for facilitating evacuation of the gas through the boil-off pipe 20. The inner diameter D2 of the lower portion 22 of the boil-off pipe 20 and the outer diameter D3 of the portion 42 of the tank pipe member 40 are dimensioned such that a space between the outer surface of the pipe portion 42 and the inner surface of the lower portion 22 of the boil-off pipe 20 is created for allowing air to pass. Thus, the lower portion 22 of the boil-off pipe 20 and the portion 42 of the tank pipe member 40 in the boil-off pipe 20 are dimensioned such that an air gap is created there between for promoting the ejector effect.
Fig. 4 schematically illustrates a perspective view of an arrangement A for facilitating evacuating evaporated liquefied gas of a liquefied gas fuel system of a vehicle according of an embodiment of the present disclosure.
More specifically, fig. 3 schematically illustrates a perspective view of the arrangement A in fig. 1 a with a conical configuration 30, a lower portion 22 of the boil-off pipe 20 and a portion 42 of the tank pipe member 40 introduced into the conical configuration 30 and the lower portion 22 of the boil-off pipe according to an embodiment of the present disclosure.
According to this embodiment the conical configuration 30 has a tapered body 34 configured to taper from the lower opening 32 towards a lower portion 22 of the boil-off pipe 20 so as to facilitate guiding the portion 42 of the tank pipe member 40 into the lower portion 22 of the boil-off pipe 20.
The embodiment according to fig. 4 differs from the embodiment according to fig. 3 in that the lower end portion 22 of the boil-off pipe 20 above the conical configuration 30 and below the upper end 40a of the end portion 42 of the tank pipe member 40 introduced into the boil-off pipe 20 comprises a waist configuration 22A for promoting an ejector effect for facilitating evacuation of the gas through the boil-off pipe. The lower end portion 22 of the boil-off pipe 20 thus, according to this embodiment, comprises a waist configuration 22A having an inner diameter D2a at its shortest position and cylindrical portion 22B running from the waist configuration 22A towards the upper side of the boil-off pipe and having an inner diameter D2b. The inner diameter D2a of the waist configuration 22A is shorter than the inner diameter D2b of the cylindrical portion 22B of the lower portion 22 of the boil off-pipe 20.
The lower opening 32 of the conical configuration 30 has an inner diameter D1. The inner diameter D2a of the waist configuration 22A and thus the inner diameter D2b of the cylindrical portion 22B are shorter than the inner diameter D1 of the lower opening portion 32 of the conical configuration 30.
The portion 42 of the tank pipe member 40 configured to be introduced into the lower opening 32 of the conical configuration 30 has an outer diameter D3.
The inner diameter D2a of the waist configuration 22A and thus the inner diameter D2b of the cylindrical portion 22B are shorter than the outer diameter D3 of the portion 42 of the tank pipe member 40 so as to allow movement of the boil-off pipe in the vertical direction relative to the portion 42 introduced into the boil-off pipe 20. The portion 42 of the tank pipe member 40 is configured to be sufficiently introduced into the boil-off pipe 20 so that the end portion 40a of the portion 42 remains in the boil-off pipe 20 independent of cab and thus boil-off pipe movements.
According to this embodiment of the arrangement A the waist configuration 22A of the lower portion 22 of the boil-off pipe 20 and the portion 42 of the tank pipe member 40 in the boil-off pipe 20 are dimensioned to promote an ejector effect for facilitating evacuation of the gas through the boil-off pipe 20. The inner diameter D2a of the waist configuration 22A of the lower portion 22 of the boil-off pipe 20 and the outer diameter D3 of the portion 42 of the tank pipe member 40 are dimensioned such that a space between the outer surface of the pipe portion 42 and the inner surface of the waist configuration 22A of the lower portion 22 of the boil-off pipe 20 is created for allowing air to pass. Thus, the waist configuration 22A of the lower portion 22 of the boil-off pipe 20 and the portion 42 of the tank pipe member 40 in the boil-off pipe 20 are dimensioned such that an air gap is created there between for promoting the ejector effect.
The portion 42 of the tank pipe member 40 has an inner diameter D4. The thickness of the portion 42, i.e. the difference between inner outer diameter D3 and inner diameter D4 is adapted to optimize the ejector effect.
In the embodiments described above with reference to fig. 3 and 4 the lower portion of the boil-off pipe and the portion of the tank pipe member introduced into the conical configuration and further into the lower portion of the boil-off pipe have a circular cross sections so as to allow the introduction of the portion of the tank pipe member and relative movements between the lower portion of the boil-off pipe and the portion of the tank pipe member in their longitudinal extensions. The lower portion of the boil-off pipe and the portion of the tank pipe member introduced into the conical configuration and further into the lower portion of the boil-off may have any suitable cross sections for allowing the introduction of the portion of the tank pipe member and relative movements between the lower portion of the boil-off pipe and the portion of the tank pipe member in their longitudinal extensions.
The foregoing description of the preferred embodiments of the present disclosure has been provided for the purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations will be apparent to practitioners skilled in the art. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, thereby enabling others skilled in the art to understand the invention for various embodiments and with the various modifications as are suited to the particular use contemplated.

Claims

1 . An arrangement (A) for facilitating evacuating evaporated liquefied gas of a liquefied gas fuel system (I) of a vehicle (1 ), the vehicle having a tiltable cab (2) and a vehicle chassis (3), the cab being movably connected to the vehicle chassis (3) in a non-tilted position of the cab, the fuel system having a chassis- mounted liquefied gas fuel tank (10) for providing fuel to the engine of the vehicle (1 ), wherein evaporated gas is arranged to be evacuated from the tank (10) via the boil-off pipe (20) at a certain tank pressure, the boil-off pipe (20) being attached to the rear side of the cab (2), wherein the arrangement (A) is configured to allow evaporated gas from the tank (10) to be evacuated through the boil-off pipe (20) in the non-tilted position, the arrangement (A) comprising a downwardly open conical configuration (30) as a lower end connection of the boil-off pipe (20) and a tank pipe member (40) attached to the tank (10) for conveying evaporated gas from the tank (10), characterized in that the conical configuration (30) and tank pipe member (40) are configured so that, when the cab is moved from the tilted to the non-tilted position, a portion (42) of the tank pipe member (40) is introduced into the conical configuration (30) and further into the boil-off pipe (22) above the conical configuration (30) so that gas evaporated from the tank (10) is introduced into and evacuated through the boil-off pipe (20) via the tank pipe member (40).
2. An arrangement according to claim 1 , wherein the conical configuration (30) and tank pipe member (40) are configured so that, in the non-tilted position, during cab and thus conical configuration (30) movement, the conical configuration (30) is allowed to move relative to the portion (42) of the tank pipe member (40) introduced into the boil-off pipe (20) above the conical configuration (30).
3. An arrangement according to claim 1 , wherein the boil-off pipe (20) and the portion (42) of the tank pipe member (40) in the boil-off pipe (20) are dimensioned to promote an ejector effect for facilitating evacuation of the gas through the boil-off pipe (20).
4. An arrangement according to claim 1 or 2, wherein the lower end portion (22) of the boil-off pipe (20) above the conical configuration (30) and below the upper end (40a) of the end portion (42) of the tank pipe member (40) introduced into the boil-off pipe (20) comprises a waist configuration (22A) for promoting an ejector effect for facilitating evacuation of the gas through the boil-off pipe (20).
5. A vehicle (1 ) comprising an arrangement according to any of claims 1 -4.
PCT/SE2019/050902 2018-10-09 2019-09-23 An arrangement for facilitating evacuating evaporated liquefied gas of a liquefied gas fuel system of a vehicle WO2020076210A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112019004394.3T DE112019004394T5 (en) 2018-10-09 2019-09-23 Arrangement for promoting the removal of vaporized liquefied gas from a liquefied petroleum gas system of a vehicle

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SE1851232A SE542586C2 (en) 2018-10-09 2018-10-09 An arrangement for facilitating evacuating evaporated liquefied gas of a liquefied gas fuel system of a vehicle
SE1851232-7 2018-10-09

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10969046B2 (en) * 2016-06-09 2021-04-06 Volvo Truck Corporation Gas venting pipe

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017211416A1 (en) * 2016-06-09 2017-12-14 Volvo Truck Corporation A gas venting pipe
WO2018048334A1 (en) * 2016-09-09 2018-03-15 Scania Cv Ab An arrangement for mounting a boil-off pipe of a liquefied gas fuel system to a vehicle
SE540242C2 (en) * 2016-09-09 2018-05-08 Scania Cv Ab An arrangement for mounting a boil-off pipe of a liquefied gas fuel system to a vehicle
SE540241C2 (en) * 2016-09-09 2018-05-08 Scania Cv Ab An arrangement for mounting a gas pipe to a vehicle
WO2018117927A1 (en) * 2016-12-21 2018-06-28 Scania Cv Ab An arrangement for mounting a boil-off pipe of a liquefied gas fuel system to a vehicle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017211416A1 (en) * 2016-06-09 2017-12-14 Volvo Truck Corporation A gas venting pipe
WO2018048334A1 (en) * 2016-09-09 2018-03-15 Scania Cv Ab An arrangement for mounting a boil-off pipe of a liquefied gas fuel system to a vehicle
SE540242C2 (en) * 2016-09-09 2018-05-08 Scania Cv Ab An arrangement for mounting a boil-off pipe of a liquefied gas fuel system to a vehicle
SE540241C2 (en) * 2016-09-09 2018-05-08 Scania Cv Ab An arrangement for mounting a gas pipe to a vehicle
WO2018117927A1 (en) * 2016-12-21 2018-06-28 Scania Cv Ab An arrangement for mounting a boil-off pipe of a liquefied gas fuel system to a vehicle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10969046B2 (en) * 2016-06-09 2021-04-06 Volvo Truck Corporation Gas venting pipe

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SE542586C2 (en) 2020-06-09
SE1851232A1 (en) 2020-04-10
DE112019004394T5 (en) 2021-05-20

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