SE542586C2 - 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

Info

Publication number
SE542586C2
SE542586C2 SE1851232A SE1851232A SE542586C2 SE 542586 C2 SE542586 C2 SE 542586C2 SE 1851232 A SE1851232 A SE 1851232A SE 1851232 A SE1851232 A SE 1851232A SE 542586 C2 SE542586 C2 SE 542586C2
Authority
SE
Sweden
Prior art keywords
pipe
boil
tank
cab
vehicle
Prior art date
Application number
SE1851232A
Other languages
Swedish (sv)
Other versions
SE1851232A1 (en
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 SE1851232A priority Critical patent/SE542586C2/en
Priority to PCT/SE2019/050902 priority patent/WO2020076210A1/en
Priority to DE112019004394.3T priority patent/DE112019004394T5/en
Publication of SE1851232A1 publication Critical patent/SE1851232A1/en
Publication of SE542586C2 publication Critical patent/SE542586C2/en

Links

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
    • B60K15/01—Arrangement of fuel conduits
    • B60K15/013—Arrangement of fuel conduits of gas conduits
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • 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 nontilted 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 ARRANGEIVIENT FOR FACILITATING EVACUATING EVAPORATEDLIOUEFIED GAS OF A LIOUEFIED GAS FUEL SYSTEM OF A VEHICLE TECHNICAL FIELD The invention relates to an arrangement for facilitating evacuating evaporatedliquefied gas of a liquefied gas fuel system of a vehicle The invention alsorelates to a vehicle.
BACKG ROUND ART Alternative fuels such as natural gas and biogas are being introduced invehicles such as heavy vehicles. For this purpose fuel systems for compressednatural 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 lowtemperatures, e.g. -130 degree Celsius at 10 bar for LNG, requiring certainconduits for transporting the liquefied natural gas and a certain tank for housingthe fuel. When the vehicle is standing still and the engine is not operating thepressure in the tank will increase due to temperature increase in the tank.Therefore the system for liquefied gas is provided with a relief valve whichaccording 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 andin connection to the vehicle frame. The evaporated gas is configured to beevacuated via a so called boil-off pipe connected to the fuel tank. The gasneeds to be evacuated at a certain height. The boil-off pipe is further notallowed to project laterally or upwardly from the vehicle.
For trucks the boil-off pipe is therefore usually arranged behind the cab of thetruck. 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 verticalmember arranged in connection to and at a distance from the rear side of thecab to avoid influence from the tilting.
Such a solution, however, takes up space behind the cab which otherwisecould be used for overhang or semi-trailer in order to optimize the length of theload carrying part of the vehicle.
Therefor it is desired to attach the boil-off pipe to the rear side of the cab. Bythus arranging the boil-off pipe to the rear side of a tiltable cab an arrangementfor facilitating evacuating evaporated liquefied gas of the liquefied gas fuelsystem taking the fact that the boil-off pipe is moved relative to the tank whenthe 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 facilitatingevacuating evaporated liquefied gas of a liquefied gas fuel system of a vehiclehaving a tiltable cab.
OBJECTS OF THE INVENTION An object of the present disclosure is to provide an arrangement for facilitatingevacuating 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 achievedby an arrangement and a vehicle as set out in the appended independentclaims. Preferred embodiments of the arrangement are defined in appended dependent claims.
Specifically an object of the invention is achieved by an arrangement forfacilitating evacuating evaporated Iiquefied gas of a Iiquefied gas fuel systemof a vehicle. The vehicle has a tiltable cab and a vehicle chassis, the cab beingmovably connected to the vehicle chassis in a non-tilted position of the cab.The fuel system has a chassis-mounted Iiquefied gas fuel tank for providingfuel to the engine of the vehicle, and a boil-off pipe. Evaporated gas is arrangedto 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 isconfigured to allow evaporated gas from the tank to be evacuated through theboil-off pipe in the non-tilted position. The arrangement comprises adownwardly open conical configuration as a lower end connection of the boil-off pipe and a tank pipe member attached to the tank for conveying evaporatedgas from the tank. The conical configuration and tank pipe member areconfigured so that, when the cab is moved from the tilted to the non-tiltedposition, a portion of the tank pipe member is introduced into the conicalconfiguration and further into the boil-off pipe above the conical configurationso 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 Iiquefied gasfuel 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 evaporatedfrom the tank is evacuated through the boil-off pipe. The solution with thedownwardly 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 thesize of the bottom opening of the conical configuration sufficiently large for allowing the tank pipe member to be introduced into the lower opening of theconical configuration independent of certain movement of the cab and thusconical configuration relative to the chassis and thus tank pipe member andcertain movement of the introduction portion of the tank pipe member relativeto the conical configuration. By thus providing a downwardly open conicalconfiguration as a lower end connection of the boil-off pipe adapted to receivethe tank pipe member and direct the portion of the tank pipe member so that itis introduced further into the boil-off pipe above the conical configuration anejector effect is obtained, reducing the risk of gas evaporated from the tankand evacuated from the portion of the tank pipe member flowing backwards inthe space between the portion of the tank pipe member and the boil-off pipetowards the opening of the conical configuration. Thus the solution functionsas a diffuser. Hereby a relatively simple and cost efficient design for facilitatingevacuating evaporated liquefied gas of a liquefied gas fuel system of a vehiclefrom the chassis-mounted liquefied gas fuel tank through the cab-mountedboil-off pipe.
According to an embodiment of the arrangement the conical configuration andtank pipe member are configured so that, in the non-tilted position, during caband thus conical configuration movement, the conical configuration is allowedto 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 inconnection to cab movements in the non-tilted position of the cab may bereduced.
According to an embodiment of the arrangement the boil-off pipe and theportion of the tank member in the boil-off pipe are dimensioned to promote anejector 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 theportion of the tank pipe member flowing backwards in the space between theportion of the tank pipe member and the boil-off pipe towards the opening ofthe conical configuration is reduced.
According to an embodiment of the arrangement the lower end portion of theboil-off pipe above the conical configuration and below the upper end of theend portion of the tank pipe member introduced into the boil-off pipe comprisesa waist configuration for promoting an ejector effect for facilitating evacuationof the gas through the boil-off pipe. Hereby the risk of the gas evaporated fromthe tank and evacuated from the portion of the tank pipe member flowingbackwards in the space between the portion of the tank pipe member and theboil-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 thefollowing detailed description when read in conjunction with the accompanyingdrawings, wherein like reference characters refer to like parts throughout the several views, and in which: Fig. 1a schematically illustrates a side view of a vehicle with a tiltable cab in anon-tilted position, the vehicle having an arrangement for facilitatingevacuating evaporated liquefied gas of a liquefied gas fuel system of a vehicleaccording to an embodiment of the present disclosure; Fig. 1 b schematically illustrates a side view of the vehicle in fig. 1a with the cabin a tilted position; Fig. 2 schematically illustrates a perspective view of boil-off pipe and tank pipemember of the liquefied gas fuel system and the arrangement for facilitatingevacuating 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 facilitatingevacuating evaporated Iiquefied gas of a Iiquefied gas fuel system of a vehicleaccording to an embodiment of the present disclosure; and Fig. 4 schematically illustrates a perspective view of an arrangement forfacilitating evacuating evaporated Iiquefied gas of a Iiquefied gas fuel systemof a vehicle according of an embodiment of the present disclosure.
DETAILED DESCRIPTION Hereinafter the term “Iiquefied gas” refers to Iiquefied natural gas, LNG, orIiquefied biogas, LBG.
Hereinafter the term “Iiquefied gas fuel system” refers to a fuel system forIiquefied natural gas, LNG, or a fuel system for Iiquefied biogas, LBG.
Hereinafter the term “flexible hose” refers to hoses configured to transport fluidfor a Iiquefied gas fuel system, the hose being bendable to a certain degreeand having a certain flexibility so as to facilitate taking up relative movementsof a vehicle cab relative to a Iiquefied gas fuel tank.
Hereinafter the term “boil-off pipe” refers to a pipe, preferably a rigid pipe,configured to evacuate evaporated gas from a Iiquefied gas fuel tank of aIiquefied gas fuel system. The pipe is according to an embodiment made ofstainless steel. The boil-off pipe could alternatively be flexible such as a flexiblehose. The boil-off pipe may have any suitable cross section comprising circularcross section or other polygonal cross section such as e.g. square crosssecüon.
Hereinafter the term “tank pipe member” refers to any suitable pipe or hose ora combination thereof. The tank pipe member may have any suitable crosssection comprising circular cross section or other polygonal cross section such as e.g. square cross section.
Fig. 1a schematically illustrates a side view of a vehicle 1 with a tiltable cab 2in a non-tilted position; and fig. 1b schematically illustrates a side view of thevehicle 1 in fig. 1a with the cab 2 in a tilted position.
The vehicle has an arrangement A for facilitating evacuating evaporatedliquefied gas of a liquefied gas fuel system I of a vehicle according to anembodiment of the present disclosure.
The vehicle 1 has a vehicle chassis 3. The cab 2 is tiltable relative to the vehiclechassis 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 vehicle1 is fuelled by means of the liquefied gas fuel system I for operating the engineof the vehicle. The vehicle 1 may be any suitable truck configured to bearranged with a load carrying part behind the cab 2. Such a vehicle may be atruck arranged to carry an overhang behind the cab 2 or a semi-trailer truckcomprising a towing truck and a semi-trailer coupled to the towing truck behindthe cab 2 via a fifth wheel.
The cab 2 is tiltable between a non-tilted position, illustrated in fig. 1a, in whichthe cab is upright and the vehicle may be driven, and a tilted position, illustratedin fig. 1b. ln the non-tilted position, the cab 2 is locked by means of a cablocking arrangement comprising cab locking members, not shown. A lockingarrangement is thus provided having a cab locking portion of the cab 2 and achassis locking portion of the chassis 3 for locking the cab to the chassis in thenon-tilted position of the cab. The cab locking portion is connected to a cabbody 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 2is according to an embodiment tiltable by means of a cab tilting operationarrangement 50 shown in fig. 1a. The cab tilting operation arrangement 50 comprises a pump unit 52 and at least one hydraulic piston unit 54 for tiltingthe cab 2, hydraulically connected to the pump unit 52 via a hydraulic line.
The vehicle thus comprises a liquefied gas fuel system l. The liquefied gas fuelsystem l comprises a chassis-mounted liquefied gas fuel tank 10 for providingfuel to the engine of the vehicle 1.
The liquefied gas fuel system l comprises a boil-off pipe 20 through whichevaporated gas from the tank 10 is configured to be evacuated at a certaintank pressure. The boil-off pipe 20 is configured to be connected to the fueltank 10. The liquefied gas fuel system I for liquefied gas is provided with arelief valve, not shown, which is set to open at the certain pressure forevacuating evaporated gas from the tank 10 via the boil-off pipe 20. Thepressure 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. 1a-b is a simplified illustration. The vehiclechassis of the vehicle 1 normally comprises a vehicle frame comprising a leftlongitudinal 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 aleft liquefied gas fuel tank part arranged in connection to a left longitudinalvehicle 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-offpipe 20 is arranged to be fixedly attached to the rear side of the cab 2 by meansof any suitable fastening means, e.g. any suitable joints such as one or morescrewjoints, see fig. 2. The boil-off pipe 20 is thus arranged to be tilted togetherwith 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 theevaporated 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 evacuatingevaporated Iiquefied gas of the Iiquefied gas fuel system l of the vehicle 1. Theboil-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 tobe evacuated through the boil-off pipe 20 in the non-tilted position of thevehicle 1.
The arrangement A comprises a downwardly open conical configuration 30 asa lower end connection of the boil-off pipe 20. According to an embodiment ofthe arrangement the conical configuration has a tapered body 34 configuredto taper from the lower opening 32 towards a lower portion 22 of the boil-offpipe 20.
The conical configuration 30 together with the boil-off pipe 20 is thus arrangedto 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 ofthe boil-off pipe 20 is thus arranged to move together with any cab movementcomprising movement between tilted and non-tilted positon of the cab 2 andmovements of the cab 2 relative to the chassis 3 in the non-tilted positon of thecab 2.
According to an embodiment the conical configuration 30 is attached to an endportion 22 of the boil-off pipe 20. The end portion 22 of the boil-off pipe 20constituting the lower end portion of the boil-off pipe 20 when the boil-off pipe20 is mounted to the rear side of the cab 2. Thus, in that embodiment theconical configuration 30 constitutes a separate part configured to be attachedto the lower end portion of the boil-off pipe 20.
According to an embodiment a pipe portion constituting an end portion 22 ofthe boil-off pipe and the conical configuration 30 constitute an integratedportion configured to be attached to a lower end of the boil-off pipe 20. ln thisembodiment 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 configuration30 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 30constitutes an integrated portion of the boil-off pipe 20. Thus, in thatembodiment the conical configuration 30 constitutes the lowest end portion ofthe boil-off pipe 20, when the boil-off pipe is mounted to the rear side of thecab 2. Thus, in that embodiment the conical configuration 30 transfers into thelower pipe portion 22.
The arrangement A further comprises a tank pipe member 40 attached to thetank 10 for conveying evaporated gas from the tank 10. The tank pipe member40 may be connected to the tank 10 in any suitable way. The tank pipe membermay be any suitable pipe or hose or a combination thereof. The tank pipemember 40 may be connected to the chassis 1 of the vehicle 1, see fig. 2. Atleast a portion of the tank pipe member 40 comprising the portion 42 has acertain rigidity so as to prevent or at least reduce/minimize movement of theportion 42. Thus, the portion 42 of the tank pipe member 40 has a certainstiffness. According to an embodiment of the disclosure the certain stiffness ofthe portion 42 of the tank pipe member 40 is obtained by introducing a rigidpipe into the portion 42.
The conical configuration 30 and the tank pipe member 40 are configured sothat, when the cab is moved from the tilted position, illustrated in fig. 1b, to thenon-tilted position, illustrated in fig. 1a, a portion 42 of the tank pipe member40 is introduced into the conical configuration 30 and further into the boil-offpipe 20 above the conical configuration 30 so that gas evaporated from thetank 10 is introduced into and evacuated through the boil-off pipe 20 via thetank pipe member 40. The portion 42 of the tank pipe member 40 is thusintroduced into the conical configuration 30 and further into the lower portion22 of the boil-off pipe 20. 11 According to an embodiment of the arrangement A the conical configuration30 and tank pipe member 40 are configured so that, in the non-tilted position,during cab and thus conical configuration movement, the conical configuration30 is allowed to move relative to the portion 42 of the tank pipe memberintroduced into the boil-off pipe above the conical configuration.
Thus, in the non-tilted position, during cab and thus boil-off pipe and conicalconfiguration movement, the lower portion 22 of the boil-off pipe is allowed tomove 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 relativeto the portion 42 of the tank pipe member 40 positioned in the conicalconfiguration 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. thelower portion 22 of the boil-off pipe 20, and the portion 42 of the tank pipemember 40 in the boil-off pipe 20 are dimensioned to promote an ejector effectfor facilitating evacuation of the gas through the boil-off pipe 20, see fig. 3 andfig. 4.
Fig. 2 schematically illustrates a perspective view of a boil-off pipe 20 and tankpipe member 40 of the liquefied gas fuel system and the arrangement A forfacilitating evacuating evaporated liquefied gas of the liquefied gas fuel systemfor a non-tilted position according to an embodiment of the present disclosure.
As illustrated in fig. 1a-b, the boil-off pipe 20 is configured to be attached to therear side of the cab of the vehicle, not shown here. The boil-off pipe 20 isarranged to be fixedly attached to the rear side of the cab by means of anysuitable fastening means. According to this embodiment the fastening meanscomprises an upper fastening arrangement F1, an intermediate fasteningarrangement F2 and a lower fastening arrangement F3. The upper fastening arrangement F1 is configured to provide an attachment of the boil-off pipe 20 12 to the rear side of the cab in connection to an upper portion of the boil-off pipe20. The intermediate fastening arrangement F2 is configured to provide anattachment of the boil-off pipe 20 to the rear side of the cab in connection toan intermediate portion of the boil-off pipe 20. The lower fasteningarrangement F3 is configured to provide an attachment of the boil-off pipe 20to the rear side of the cab in connection to a lower portion of the boil-off pipe20.
The boil-off pipe 20 has an upper side 20a with an opening through which theevaporated gas is arranged to be evacuated and an opposing lower side forreceiving 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 whichhas been introduced into the conical configuration and further to the lowerportion 22 of the boil-off pipe, has an upper end side 40a through which theevaporated gas is arranged to be evacuated into the boil-off pipe 20 forevacuation through the boil-off pipe 20. The tank pipe member 40 has anopposing 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 tothe vehicle chassis, not shown here. The tank pipe member 40 is arranged tobe fixedly attached to the vehicle chassis, directly or via any suitable memberfixed to the vehicle chassis, by means of any suitable fastening means.According to this embodiment the fastening means comprises a tank pipemember fastening arrangement F4. The tank pipe member fasteningarrangement F4 is configured to attach the tank pipe member 40 relativelyclose to the portion 42 of the tank pipe member 40 so as to minimize movementof the portion 42 of the tank pipe member 40. Hereby it is facilitated to keepthe portion 42 of the tank pipe member 40 straight and directed such that it issecurely introduced into the lower opening 32 of the conical configuration 30and 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. 13 As mentioned above, at least a portion of the tank pipe member 40 comprisingthe portion 42 has a certain rigidity so as to prevent or at least reduce/minimizemovement of the portion 42 so that the portion 42 of the tank pipe member 40is securely introduced into the lower portion 32 of the conical configuration 30and further into the boil-off pipe 20 when the cab is moved from the tilted tothe non-tilted position.
According to an embodiment at least a portion of the portion 44 of the tankpipe member 40 running from the tank pipe member fastening arrangementF4 and the upper end side 40a is flexible so as to allow cab movements andthus movements of the boil-off pipe and conical configuration relative to thevehicle chassis with the portion 42 of the tank pipe member 40 introduced intothe boil-off pipe 20.
According to an embodiment the tank pipe member fastening arrangement F4suspendedly arranged in connection to the vehicle chassis so as to allow cabmovements and thus movements of the boil-off pipe and conical configurationrelative to the vehicle chassis with the portion 42 of the tank pipe member 40introduced into the boil-off pipe 20. Hereby the portion 44 of the tank pipemember 40 running from the tank pipe member fastening arrangement F4 andinto the lower portion 22 of the boil-off pipe 20 may be essentially rigid. Thetank pipe member fastening arrangement F4 may comprise any suitable springarrangement 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 facilitatingevacuating evaporated liquefied gas of a liquefied gas fuel system of a vehicleaccording to an embodiment of the present disclosure. l\/lore specifically, fig. 3 schematically illustrates a side view of the arrangementA in fig. 1a with a conical configuration 30, a lower portion 22 of the boil-offpipe 20 and a portion 42 of the tank pipe member 40 introduced into the conical 14 configuration 30 and the lower portion 22 of the boil-off pipe according to anembodiment of the present disclosure.
The portion 42 of the tank pipe member 40 has thus been introduced into the lower opening 32 of the conica| configuration 30.
According to this embodiment the conica| configuration 30 has a tapered body34 configured to taper from the lower opening 32 towards a lower portion 22of the boil-off pipe 20 so as to facilitate guiding the portion 42 of the tank pipemember 40 into the lower portion 22 of the boil-off pipe 20.
The lower opening 32 of the conica| configuration 30 has a diameter D1. Thediameter D1 is the inner diameter of the opening 32 of the conica| configuration30. The lower portion 22 of the boil-off pipe 20 has an inner diameter D2 whichis shorter than the inner diameter D1 of the lower opening portion 32 of the conica| configuration 30.
The tank pipe member 40, i.e. the portion 42 of the tank pipe member 40configured to be introduced into the lower opening 32 of the conica|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 innerdiameter D1 of the lower opening 32 so that the size of the bottom opening 32of the conica| configuration 30 is sufficiently large for allowing the portion 42 ofthe tank pipe member to be introduced into the lower opening 32 of the conica|configuration 30 independent of certain movement of the cab and thus conica|configuration 30 relative to the chassis and thus tank pipe member 40 andcertain movement of the introduction portion 42 of the tank pipe member relative to the conica| configuration 30.
The outer diameter D3 of the portion 42 is shorter than the inner diameter D2of the lower portion 22 of the boil-off pipe 20 so as to allow movement of theboil-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 configuredto be sufficiently introduced into the boil-off pipe 20 so that the end portion 40aof 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 theboil-off pipe 20 and the portion 42 of the tank pipe member 40 in the boil-offpipe 20 are dimensioned to promote an ejector effect for facilitating evacuationof the gas through the boil-off pipe 20. The inner diameter D2 of the lowerportion 22 of the boil-off pipe 20 and the outer diameter D3 of the portion 42 ofthe tank pipe member 40 are dimensioned such that a space between the outersurface of the pipe portion 42 and the inner surface of the lower portion 22 ofthe boil-off pipe 20 is created for allowing air to pass. Thus, the lower portion22 of the boil-off pipe 20 and the portion 42 of the tank pipe member 40 in theboil-off pipe 20 are dimensioned such that an air gap is created there betweenfor promoting the ejector effect.
Fig. 4 schematically illustrates a perspective view of an arrangement A forfacilitating evacuating evaporated liquefied gas of a liquefied gas fuel systemof a vehicle according of an embodiment of the present disclosure. l\/lore specifically, fig. 3 schematically illustrates a perspective view of thearrangement A in fig. 1a with a conical configuration 30, a lower portion 22 ofthe boil-off pipe 20 and a portion 42 of the tank pipe member 40 introducedinto the conical configuration 30 and the lower portion 22 of the boil-off pipeaccording to an embodiment of the present disclosure.
According to this embodiment the conical configuration 30 has a tapered body34 configured to taper from the lower opening 32 towards a lower portion 22of the boil-off pipe 20 so as to facilitate guiding the portion 42 of the tank pipemember 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 16 configuration 30 and below the upper end 40a of the end portion 42 of the tankpipe member 40 introduced into the boil-off pipe 20 comprises a waistconfiguration 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 thisembodiment, comprises a waist configuration 22A having an inner diameterD2a at its shortest position and cy|indrica| portion 22B running from the waistconfiguration 22A towards the upper side of the boil-off pipe and having aninner diameter D2b. The inner diameter D2a of the waist configuration 22A isshorter than the inner diameter D2b of the cy|indrica| portion 22B of the lowerportion 22 of the boil off-pipe 20.
The lower opening 32 of the conical configuration 30 has an inner diameterD1. The inner diameter D2a of the waist configuration 22A and thus the innerdiameter D2b of the cy|indrica| portion 22B are shorter than the inner diameterD1 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 innerdiameter D2b of the cy|indrica| portion 22B are shorter than the outer diameterD3 of the portion 42 of the tank pipe member 40 so as to allow movement ofthe boil-off pipe in the vertical direction relative to the portion 42 introduced intothe boil-off pipe 20. The portion 42 of the tank pipe member 40 is configuredto be sufficiently introduced into the boil-off pipe 20 so that the end portion 40aof 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 configuration22A of the lower portion 22 of the boil-off pipe 20 and the portion 42 of the tankpipe 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 17 inner diameter D2a of the waist configuration 22A of the lower portion 22 ofthe boil-off pipe 20 and the outer diameter D3 of the portion 42 of the tank pipemember 40 are dimensioned such that a space between the outer surface ofthe pipe portion 42 and the inner surface of the waist configuration 22A of thelower 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 andthe portion 42 of the tank pipe member 40 in the boil-off pipe 20 aredimensioned 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. Thethickness of the portion 42, i.e. the difference between inner outer diameter D3 and inner diameter D4 is adapted to optimize the ejector effect. ln the embodiments described above with reference to fig. 3 and 4 the lowerportion of the boil-off pipe and the portion of the tank pipe member introducedinto the conical configuration and further into the lower portion of the boil-offpipe have a circular cross sections so as to allow the introduction of the portionof the tank pipe member and relative movements between the lower portion ofthe boil-off pipe and the portion of the tank pipe member in their longitudinalextensions. The lower portion of the boil-off pipe and the portion of the tankpipe member introduced into the conical configuration and further into thelower portion of the boil-off may have any suitable cross sections for allowingthe introduction of the portion of the tank pipe member and relative movementsbetween 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 presentdisclosure has been provided for the purposes of illustration and description.lt is not intended to be exhaustive or to limit the invention to the precise formsdisclosed. Obviously, many modifications and variations will be apparent topractitioners skilled in the art. The embodiments were chosen and described in order to best explain the principles of the invention and its practical 18 applications, thereby enabling others ski||ed in the art to understand theinvention for various embodiments and with the various modifications as are suited to the particular use contempiated.

Claims (5)

19 CLAIIVIS
1. An arrangement (A) for facilitating evacuating evaporated Iiquefied gas ofa Iiquefied gas fuel system (l) of a vehicle (1), the vehicle having a tiltable cab(2) and a vehicle chassis (3), the cab being movably connected to the vehiclechassis (3) in a non-tilted position of the cab, the fuel system having a chassis-mounted Iiquefied gas fuel tank (10) for providing fuel to the engine of thevehicle (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) isconfigured to allow evaporated gas from the tank (10) to be evacuated throughthe boil-off pipe (20) in the non-tilted position, the arrangement (A) comprisinga downwardly open conical configuration (30) as a lower end connection of theboil-off pipe (20) and a tank pipe member (40) attached to the tank (10) forconveying evaporated gas from the tank (10), characterized in that theconical 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) sothat gas evaporated from the tank (10) is introduced into and evacuatedthrough 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-tiltedposition, during cab and thus conical configuration (30) movement, the conicalconfiguration (30) is allowed to move relative to the portion (42) of the tankpipe 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) andthe portion (42) of the tank pipe member (40) in the boil-off pipe (20) aredimensioned to promote an ejector effect for facilitating evacuation of the gasthrough 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 theupper 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) forpromoting an ejector effect for facilitating evacuation of the gas through theboil-off pipe (20).
5. A vehicle (1) comprising an arrangement according to any of claims 1-4.
SE1851232A 2018-10-09 2018-10-09 An arrangement for facilitating evacuating evaporated liquefied gas of a liquefied gas fuel system of a vehicle SE542586C2 (en)

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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
PCT/SE2019/050902 WO2020076210A1 (en) 2018-10-09 2019-09-23 An arrangement for facilitating evacuating evaporated liquefied gas of a liquefied gas fuel system of a vehicle
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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US10969046B2 (en) * 2016-06-09 2021-04-06 Volvo Truck Corporation Gas venting pipe
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SE540235C2 (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
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
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