• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to an arrangement for a liquefied gas fuel system for a vehicle (1). The fuel system has two separate liquefied gas fuel tanks (TM, TS) for providing fuel to the engine (E) of the vehicle (1). Said fuel tanks (TM, TS) are in fluid communication via a connection arrangement. (110) comprising a set of pipes (P). Said connection arrangement (110) comprises an interface element (112, 114) for the respective tank (TM, TS) and a set of flexible hoses (HM, HS) directly connected to the respective tank (TM, TS), wherein the set of flexible hoses (HM, HS) for the respective tank (TM, TS) are connected to the set of pipes (P) via the respective interface element (112, 114).The present invention also relates to a vehicle.(Fig. 3a)
    公开号:SE1650560A1
    申请号:SE1650560
    申请日:2016-04-27
    公开日:2017-10-28
    发明作者:Johansson Sara；Olsson Johan
    申请人:Scania Cv Ab；
    IPC主号:
    专利说明:

    AN ARRANGEMENT FOR A LIQUEFIED GAS FUEL SYSTEM FOR AVEHICLE TECHNICAL FIELD The invention relates to an arrangement for a liquefied gas fuel system for avehicle according to the preamble of claim 1. The invention also relates to avehicle.
    BACKGROUND ART Alternative fuels such as natural gas and biogas are being introduced invehicles such as heavy vehicles. For this purpose fuel systems forcompressed natural gas, CNG and compressed biogas CBG and fuelsystems for liquefied natural gas LNG and liquefied biogas LBG are beingdeveloped.
    Systems for liquefied gas, i.e. LNG and LBG, require handling of relativelylow temperatures, e.g. -130 degrees at 10 bar for LNG, requiring certainconduits for transportlng the liquefied natural gas. Further, in order to providesufficient fuel to be able to travel desired distances, liquefied gas fuel tanks ofa certain volume are required. For this purpose it is common to provide dualliquefied gas tanks, one at each side of the vehicle frame.
    Liquefied natural gas, LNG, used as fuel for gas trucks is currentlytransported in rigid pipes from the fuel tank to the engine and venting system.The pipes are long and difficult to mount, especially if the trucks have dualtanks. Further, tensions are often built into such liquefied natural gas systems.
    OBJECTS OF THE INVENTION An object of the present invention is to provide an arrangement for a Iiquefiedgas fuel system for a vehicle which facilitates mounting of the system.
    Another object of the present invention is to provide an arrangement for aIiquefied gas fuel system for a vehicle which reduces risk of built in tensionsin the system.
    SUMMARY OF THE INVENTION These and other objects, apparent from the following description, areachieved by an arrangement and a vehicle as set out in the appendedindependent claims. Preferred embodiments of the arrangement are definedin appended dependent claims.
    Specifically an object of the invention is achieved by an arrangement for aIiquefied gas fuel system for a vehicle. Said fuel system has two separateIiquefied gas fuel tanks for providing fuel to the engine of the vehicle. Saidfuel tanks are in fluid communication via a connection arrangementcomprising a set of pipes. Said connection arrangement comprises aninterface element for the respective tank and a set of flexible hoses directlyconnected to the respective tank. The set of flexible hoses for the respectivetank are connected to the set of pipes via the respective interface element.
    By thus connecting flexible hoses via the respective interface elementmounting of the Iiquefied gas fuel system is facilitated in that biggertolerances for the system, e.g. bigger tolerances for the dimensions of thepipes, due to the flexibility of the hoses are obtained. Thus, there is flexibilityin the positioning of the respective tank due to the flexible hoses. Further, therisk of built in tensions in the system is reduced in that the pipes areconnected via said interface elements to the flexible hoses and may therebybe subjected to less tensions. The solution also allows for a simpler installation of the piping and an easier handling at maintenance. Anotheradvantage is that fewer bendings will allow a less limited flow in the liquefiedgas fuel system.
    The combination of pipes and hoses provides stiffness provided by the pipeswhere desirable, for example near the propeller shaft where collisions needto be avoided, and is less costly than an alternative only consisting of hoses.
    According to an embodiment of the arrangement the respective interfaceelement is arranged to support said set of pipes. Hereby the risk of built intensions in the system is further reduced.
    According to an embodiment of the arrangement said connectionarrangement comprises a support element for said set of pipes arrangedbetween said interface elements. Hereby the risk of built in tensions in the system is further reduced.
    According to an embodiment of the arrangement one interface element isarranged to be connected to one longitudinal side of the vehicle frame andthe other interface element is arranged to be connected to the oppositelongitudinal side of the vehicle frame.
    Hereby an efficient construction for tanks arranged in connection to therespective longitudinal side of the vehicle frame is obtained. By thusarranging the interface elements in connection to the respective side of thelongitudinal side of the vehicle frame efficient support for the pipes isfacilitated.
    According to an embodiment of the arrangement said support element isarranged to be connected to a crossbeam of the vehicle frame. Hereby therisk of built in tensions in the system is further reduced.
    According to an embodiment of the arrangement said liquefied gas fuel isliquefied natural gas, LNG, or liquefied biogas, LBG.
    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 invention reference is made to the following detailed description when read in conjunction with theaccompanying drawings, wherein like reference characters refer to like parts throughout the several views, and in which: Fig. 1 schematically illustrates a perspective view of a vehicle with a liquefiedgas fuel system; Fig. 2 schematically illustrates plan view of the vehicle in fig. 1 with anarrangement for a liquefied gas fuel system according to an embodiment of the present invention; Fig. 3a schematically illustrates a perspective view of a connectionarrangement for fluid connection of two separate liquefied gas fuel tanks forproviding fuel to the engine of a vehicle; Fig. 3b schematically illustrates a front view of the connection arrangement infig. 3a; Fig. 4 schematically illustrates a perspective view of the connectionarrangement in fig. 3 connected to fuel tanks; Fig. 5 schematically illustrates a plan view of the connection arrangement infig. 4; and Fig. 6 schematically illustrates a detail of the connection arrangement in fig.
    DETAILED DESCRIPTION Hereinafter the term 'liquefied gas” refers to liquefied natural gas, LNG, orliquefied biogas, LBG.
    Hereinafter the term “liquefied gas fuel system” refers to a fuel system forliquefied natural gas, LNG, or a fuel system for liquefied biogas, LBG.
    Hereinafter the term “flexible hoses” refers to hoses configured to transportfluids for a liquefied gas fuel system being bendable to a certain degree andhaving a certain flexibility so as to facilitate connection to fuel tanks. Thehoses are according to an embodiment made of Polytetrafluoroethylene(PTFE) or internally lined with a layer of PTFE in order to benefit from themethane resistant properties of PTFE.
    Hereinafter the term "pipes” refers to rigid pipes configured to transport fluidsfor a liquefied gas fuel system which do not provide any flexibility orbendability in comparison to said flexible hoses. The pipes are according toan embodiment made of stainless steel. The pipes may also be made ofcopper.
    Fig. 1 schematically illustrates a side view of a vehicle 1 according to thepresent invention. The exemplified vehicle 1 is a heavy vehicle in the shapeof a truck. The vehicle according to the present invention could be anysuitable vehicle. The vehicle comprises an arrangement for a liquefied gasfuel system for a vehicle.
    The vehicle comprises a vehicle frame 2, 3, comprising a left longitudinalvehicle beam 2 and a right longitudinal vehicle beam 3.
    The vehicle comprises a left liquefied gas fuel tank TM arranged inconnection to the left longitudinal vehicle beam 2 and a right liquefied gasfuel tank TS arranged in connection to the right longitudinal beam 3. Thetanks TlVl, TS have an essentially cylindrical shape and are arranged on the respective side of the longitudinal vehicle beams 2, 3 axially extending alongthe respective longitudinal beam 2, 3.
    Fig. 2 schematically illustrates plan view of the vehicle in fig. 1 with thevehicle frame 2, 3, 4. The vehicle frame 2, 3, 4 comprises a left longitudinalvehicle beam 2 and a right longitudinal vehicle beam 3. The vehicle frame 2,3, 4 comprises a crossbeam 4 arranged a support between the left and rightlongitudinal beams 2, 3.
    The exemplified vehicle 1 is a heavy vehicle in the shape of a truck. Thevehicle 1 in this embodiment has a forward wheeled axle X1 with oppositefront wheels and a powered rear wheeled axle X2 with opposite tractivewheels.
    The vehicle 1 comprises a liquefied gas fuel system l. The fuel system Icomprises the two separate liquefied tanks TM, TS for providing fuel to theengine E of the vehicle 1 via a pipe PE, a left liquefied gas fuel tank TMarranged in connection to the left longitudinal vehicle beam 2 and a rightliquefied gas fuel tank TS arranged in connection to the right longitudinalbeam 3. The tanks TM, TS are arranged on the respective side of thelongitudinal vehicle beams 2, 3 axially extending along the respectivelongitudinal beam 2, 3.
    The left liquefied gas fuel tank TM is denoted the main tank TM and the rightliquefied gas fuel tank TS is denoted the auxiliary tank TS of the dual tankinstallation. The tank TM may also be denoted master tank and the tank TSmay also be denoted slave tank.
    The fuel system I comprises a connection arrangement 10. The main tankTM and auxiliary tank TS are in in fluid communication via the connectionarrangement 10.
    The connection arrangement comprises a set of pipes P.
    The connection arrangement 10 comprises an interface element 12, 14 forthe respective tank TM, TS.
    The interface element 12, 14 for the respective tank TM, TS comprises a leftinterface element 12 arranged to be connected to the left longitudinal beam 2of the vehicle frame 2, 3, 4.
    The interface element 12, 14 for the respective tank TM, TS comprises aright interface element 14 arranged to be connected to the right longitudinalbeam 3 of the vehicle frame 2, 3, 4.
    The connection arrangement 10 comprises a set of hoses HM, HS directlyconnected to the respective tank TM, TS. The set of hoses HM, HScomprises a set of hoses HM directly connected to the main tank TM and aset of hoses directly connected to the auxiliary tank TS.
    The set of flexible hoses HM, HS for the respective tank TM, TS areconnected to the set of pipes via the respective interface element 12, 14. Theset of hoses HM directly connected to the main tank TM are connected to theset of pipes P via the interface element 12. The set of hoses HM directlyconnected to the main tank TM are thus connected to one set of ends of theset of pipes P via the interface element 12. The set of hoses HS directlyconnected to the auxiliary tank TS are connected to the set of pipes P via theinterface element 14. The set of hoses HS directly connected to the auxiliarytank TS are thus connected to the opposite set of ends of the set of pipes Pvia the interface element 14.
    The connection arrangement 10 comprises a support element 16 for said setof pipes P arranged between said interface elements 12, 14. The supportelement 16 is arranged to be connected to the crossbeam 4 of the vehicleframe 2, 3, 4. The support element 16 is thus arranged to support the set ofpipes P. The set of pipes P are connected to the support element 16. Thesupport element 16 thus functions as a crossbeam pipe bracket.
    By thus connecting flexible hoses HM, HS via the respective interfaceelement 12, 14 mounting of the liquefied gas fuel system is facilitated. Biggertolerances for the system, e.g. bigger tolerances for the dimensions of thepipes P due to the flexibility of the hoses HM, HS are hereby obtained. Thus,there is flexibility in the positioning of the respective tank TM, TS due to theflexible hoses. Further, the risk of built in tensions in the system is reduced inthat the pipes P are connected via said interface elements 12, 14 to theflexible hoses HM, HS and may thereby be subjected to less tensions. Easierinstallation and maintenance is hereby facilitated.
    Fig. Ba schematically illustrates a perspective view of a connectionarrangement 110 for fluid connection of two separate liquefied gas fuel tanksTM, TS for providing fuel to the engine of a vehicle and fig. 3b schematicallyillustrates a front view of the connection arrangement 1 10 in fig. 3a. The fueltanks TM, TS have here been denoted the same reference signs as in theembodiment in fig. 2.
    The connection arrangement 110 according to this embodiment functionallycorresponds to the connection arrangement 10. The connection arrangement10 in fig. 2 is more generally illustrated. The connection arrangement 110 infig. 3a-b, fig. 4 and fig. 5 according to an embodiment essentiallycorresponds to the connection arrangement in fig. 2.
    Fig. 4 schematically illustrates a perspective view of the connectionarrangement in fig. 3 connected to fuel tanks, fig. 5 schematically illustrates aplan view of the connection arrangement in fig. 4 and fig. 6 schematicallyillustrates a detail of the connection arrangement in fig. 5.
    The connection arrangement comprises a set of pipes P.
    The set of pipes P comprises a first pipe P1 configured for transportingliquefied gas, i.e. liquefied natural gas, LNG, or liquefied biogas LBG.
    The set of pipes P comprises a second pipe P2 configured for venting inconnection to refuelling the tanks TM, TS.
    The set of pipes P comprises a third pipe P3 configured for venting of boil-offgas.
    The set of pipes P comprises a fourth pipe P4 configured for transporting thegas fuel to the engine.
    The connection arrangement 110 comprises an interface element 112, 114for the respective tank TM, TS.
    The interface element 112, 114 for the respective tank Tl/I, TS comprises aleft interface element 112. The left interface element 112 is arranged to beconnected to the left longitudinal beam 2 of the vehicle frame as illustrated infig. 5. The left interface element 112 has an upper portion 112a, see fig. 3a,for connecting the left interface 112 to the left longitudinal beam 2 by meansof fastening members F1, F2, according to an embodiment screw members,see fig. 3b. The left interface element 112 has a lower portion 112b, see fig.3a.
    The interface element 112, 114 for the respective tank Tl/I, TS comprises aright interface element 114. The right interface element 114 is arranged to beconnected to the right longitudinal beam 3 of the vehicle as illustrated in fig.5. The right interface element 114 has an upper portion 114a, see fig. 3a, forconnecting the right interface 114 to the right longitudinal beam 3 by meansof fastening members F3, F4, according to an embodiment screw members,see fig. 3b. The right interface element 114 has a lower portion 114b, see fig.3a.
    The connection arrangement 110 comprises a set of flexible hoses HM, HSdirectly connected to the respective tank Tl/I, TS. The set of flexible hosesHM, HS comprises a set of hoses HM directly connected to the main tank TMand a set of hoses directly connected to the auxiliary tank TS.
    The set of flexible hoses HM directly connected to the main tank TMcomprises a first hose HM1 configured for transporting Iiquefied gas, i.e.Iiquefied natural gas, LNG, or Iiquefied biogas LBG. The first hose HM1 isconnected to one end of the first pipe P1 via the left interface element 112.The first hose HM1 is coupled to the first pipe via coupling member CM1. Thecoupling member CM1 comprises according to an embodiment a ferrulecoupling.
    The set of flexible hoses HM directly connected to the main tank TMcomprises a second hose HM2 configured for venting in connection torefuelling the tanks TM, TS. The second hose HM2 is connected to one endof the second pipe P2 via the left interface element 112. The second hoseHM2 is coupled to the second pipe via coupling member CM2. The couplingmember CM2 comprises according to an embodiment a ferrule coupling. Thecoupling member has a T-coupling configuration for connecting a pipe P5 forsaid venting.
    The set of flexible hoses HM directly connected to the main tank TMcomprises a third hose HM3 configured for venting in connection todecoction. The third hose HM3 is connected to one end of the third pipe P3via the left interface element 112. The third hose HM3 is coupled to the thirdpipe via coupling member CM3. The coupling member CM3 comprises according to an embodiment a ferrule coupling.
    The set of flexible hoses HM directly connected to the main tank HMcomprises a fourth hose HM4 configured for transporting the gas fuel to theengine. The fourth hose H4 is connected to one end of the fourth pipe P4 viathe left interface element 112. The fourth hose HM4 is coupled to the fourthpipe via coupling member CM4. The coupling member CM4 comprisesaccording to an embodiment a ferrule coupling. The coupling member has aT-coupling configuration for connecting a pipe PE for transporting the gasfuel to the engine. Gas transported via the pipe PE to the engine will be gasfuel from the tank TM, TS having the highest pressure. 11 The set of flexibie hoses HS directly connected to the auxiliary tank TScomprises a first hose H81 configured for transporting liquefied gas, i.e.liquefied natural gas, LNG, or liquefied biogas LBG. The first hose H81 isconnected to the opposite end of the first pipe P1 via the left interfaceelement 112. The first hose H81 is coupled to the first pipe via couplingmember C81. The coupling member C81 comprises according to anembodiment a ferruie coupling.
    The set of flexibie hoses HM directly connected to the auxiliary tank TScomprises a second hose H82 configured for venting in connection torefueliing the tanks H8, TS. The second hose H82 is connected to theopposite end of the second pipe P2 via the left interface element 112. Thesecond hose H82 is coupled to the second pipe via coupling member C82.The coupling member C82 comprises according to an embodiment a ferruiecoupling.
    The set of flexibie hoses HM directly connected to the auxiliary tank T8comprises a third hose H83 configured for venting in connection todecoction. The third hose H83 is connected to the opposite end of the thirdpipe P3 via the left interface element 112. The third hose H83 is coupled tothe third pipe via coupling member C83. The coupling member C83comprises according to an embodiment a ferruie coupling.
    The set of flexibie hoses HM directly connected to the auxiliary tank T8comprises a fourth hose H84 configured for transporting the gas fuel to theengine. The fourth hose H84 is connected to the opposite end of the fourthpipe P4 via the left interface element 112. The fourth hose H84 is coupled tothe fourth pipe via coupling member C84. The coupling member C84 comprises according to an embodiment a ferruie coupling.
    The coupling members CM1-CM4, C81-C84 may be any suitable coupling.The coupling members Cl/I1-Cl/I4, C81 -C84 being a ferruie coupling may be 12 a double ferrule coupling. The coupling members could also comprise acutting ring fitting.
    The set of flexible hoses Hl/l, H8 for the respective tank TM, TS are thusconnected to the set of pipes P via the respective interface element 112, 114.The set of flexible hoses HM, HS for the respective tank TM, TS areconnected to the set of pipes P via the lower portion 112b, 114b of therespective interface element 112, 114 by means of connecting elements.
    The connection arrangement 110 comprises a support element 116 for saidset of pipes P arranged between said interface elements 112, 114. Thesupport element 116 is arranged to be connected to the crossbeam 4 of thevehicle frame, see fig. 5. The support element 116 is thus arranged tosupport the set of pipes P. The set of pipes P are connected to the supportelement 116 via connecting elements G1, G2, G3, G4. The first pipe P1 isconnected to the support element 116 via a first connecting element G1. Thesecond pipe P2 is connected to the support element 116 via a secondconnecting element G2. The third pipe P3 is connected to the supportelement 116 via a third connecting element G3. The fourth pipe P4 isconnected to the support element 116 via a fourth connecting element G4.
    By thus connecting flexible hoses Hl/l1, Hl/l2, HM3, HM4, H81, H82, H83,H84 via the respective interface element 112, 114 mounting of the liquefiedgas fuel system is facilitated. Bigger tolerances for applying the tanks TM inconnection to the respective side of the vehicle frame are obtained due tobigger tolerances for the dimensions of the pipes P due to the flexibility of thehoses HM1, HM2, Hl/l3, HM4, H81, H82, H83, H84 are hereby obtained.Thus, there is flexibility in the positioning of the respective tank TM, T8 dueto the flexible hoses. Further, the risk of built in tensions in the system isreduced in that the pipes P are connected via said interface elements 12, 14to the flexible hoses HM, H8 and may thereby be subjected to less tensions.Easier installation and maintenance is hereby facilitated. 13 The main tank Tl/l is arranged to be connected to the left Iongitudinal beam 2of the vehicle frame via fastening elements M1, M2, M3; M4 The auxiliarytank TS is arranged to be connected to the right Iongitudinal beam 2 of thevehicle frame via fastening elements S1, S2, S3.
    The interface elements 112, 114 are comprised in an arrangement for aliquefied gas fuel system for a vehicle according to an embodiment of thepresent invention. The support element 116 is according to an embodimentcomprised in said arrangement for a liquefied gas fuel system. Theconnection arrangement 110 is according to an embodiment comprised insaid arrangement for a liquefied gas fuel system.
    The foregoing description of the preferred embodiments of the presentinvention has been provided for the purposes of illustration and description. ltis 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 describedin order to best explain the principles of the invention and its practicalapplications, thereby enabling others skilled in the art to understand theinvention for various embodiments and with the various modifications as are suited to the particular use contemplated.
    权利要求:
    Claims (7)
    [1] 1. An arrangement for a liquefied gas fuel system for a vehicle (1 ), said fuelsystem having two separate liquefied gas fuel tanks (TM, TS) for providingfuel to the engine (E) of the vehicle (1), said fuel tanks (TM, TS) being in fluidcommunication via a connection arrangement (10; 110) comprising a set ofpipes (P), characterized in that said connection arrangement (10; 110)comprises an interface element (12, 14; 112, 114) for the respective tank(TM, TS) and a set of flexible hoses (HM, HS) directly connected to therespective tank (TM, TS), wherein the set of flexible hoses (HM, HS) for therespective tank (TM, TS) are connected to the set of pipes (P) via therespective interface element (12, 14; 112, 114).
    [2] 2. An arrangement according to claim 1, wherein the respective interfaceelement (12, 14; 112, 114) is arranged to support said set of pipes (P).
    [3] 3. An arrangement according to claim 1 or 2, wherein said connectionarrangement (10; 110) comprises a support element (16; 116) for said set ofpipes (P) arranged between said interface elements (12, 14; 112, 114).
    [4] 4. An arrangement according to any of claims 1-3, wherein one interfaceelement (12; 112) is arranged to be connected to one longitudinal side (2) ofthe vehicle frame and the other interface element (14; 114) is arranged to beconnected to the opposite longitudinal side (3) of the vehicle frame.
    [5] 5. An arrangement according to any of claims 1-4, wherein said supportelement (16; 116) is arranged to be connected to a crossbeam (4) of thevehicle frame.
    [6] 6. An arrangement according to any of claims 1-5, wherein said liquefiedgas fuel is liquefied natural gas, LNG, or liquefied biogas, LBG.
    [7] 7. A vehicle (1) comprising an arrangement according to any of claims 1-6.
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    同族专利:
    公开号 | 公开日
    EP3449175B1|2021-03-24|
    SE540106C2|2018-03-27|
    KR102226701B1|2021-03-12|
    EP3449175A4|2019-12-18|
    CN109073160A|2018-12-21|
    KR20180133885A|2018-12-17|
    EP3449175A1|2019-03-06|
    CN109073160B|2021-11-02|
    BR112018069570A2|2019-01-29|
    WO2017188882A1|2017-11-02|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1650560A|SE540106C2|2016-04-27|2016-04-27|A connection arrangement for a liquefied gas fuel system for a vehicle|SE1650560A| SE540106C2|2016-04-27|2016-04-27|A connection arrangement for a liquefied gas fuel system for a vehicle|
    EP17790015.6A| EP3449175B1|2016-04-27|2017-04-24|An arrangement for a liquefied gas fuel system for a vehicle|
    PCT/SE2017/050400| WO2017188882A1|2016-04-27|2017-04-24|An arrangement for a liquefied gas fuel system for a vehicle|
    BR112018069570A| BR112018069570A2|2016-04-27|2017-04-24|provision for a liquefied gas fuel system for a vehicle|
    CN201780024306.2A| CN109073160B|2016-04-27|2017-04-24|Device for liquefied gas fuel system of heavy vehicle|
    KR1020187032112A| KR102226701B1|2016-04-27|2017-04-24|Equipment for vehicle liquefied gas fuel system|
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