• 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 a method for controlling operation of suspension bellows for a vehicle tag axle of a vehicle. The tag axle is being elevated by means of a support axel elevation function in a parking state of the vehicle. The suspension bellows are being exhausted (S1) to a residual pressure in said parking state of the vehicle. The method comprises the steps of: determining (S2) a current pressure of said suspension bellows in connection to starting up the vehicle; and, if the pressure is below a desired residual pressure, controlling (S3) the pressure to obtain said desired residual pressure.The present invention also relates to a system for controlling operation of suspension bellows for a vehicle tag axle of a vehicle. The present invention also relates to a vehicle. The present invention also relates to a computer program and a computer program product.(Fig. 3)
    公开号:SE1650283A1
    申请号:SE1650283
    申请日:2016-03-03
    公开日:2017-09-04
    发明作者:JEDDI - TEHRANI Hossein；Nordqvist Jesper；Sappei Stefan
    申请人:Scania Cv Ab；
    IPC主号:
    专利说明:

    METHOD AND SYSTEM FOR CONTROLLING OPERATION OFSUSPENSION BELLOWS FOR A VEHICLE TAG AXLE TECHNICAL FIELD The invention relates to a method for controlling operation of suspensionbellows for a vehicle tag axle of a vehicle according to the preamble of claim1. The invention also relates to a system for controlling operation ofsuspension bellows for a vehicle tag axle of a vehicle. The invention alsorelates to a vehicle. The invention in addition relates to a computer programand a computer program product.
    BACKGROUND ART Heavy vehicles such as trucks are commonly equipped with air suspensionsystem. Such air suspension systems comprises suspension bellows towhich compressed air is provided, said bellows being arranged in connectionto the axles of the vehicle. Heavy vehicles such as trucks are also oftenequipped with tag axles. Such a tag axle movable between a support level inwhich the wheels of the tag axle are providing an extra support for the vehicleand an elevated position in which the wheels of the tag axle are elevatedfrom the ground.
    The tag axle is being elevated by means of a tag axel elevation function. Thetag axel elevation function may be provided by means of any suitable tagaxle elevation means such as hydraulic elevation means or pneumaticelevation means. The tag axle may be elevated/kept elevated in a parkingstate of the vehicle. The suspension bellows for the tag axle of the vehicleare then being exhausted to a residual pressure in said parking state of thevehicle. A failure in the tag axle elevation function such as e.g. a leakage in atag axle elevation means resulting in the tag axle not being kept in the elevated position but lowered towards the ground as the vehicle is in theparking state. When the vehicle is started the failure of the tag axle elevationfunction due to e.g. leakage having resulted in the lowered tag axle will bedetected and the tag axle function will be activated for eievating the tag axleto the elevated position. This may however result in the suspension bellowsfor the tag axle being folded and risking to be damaged.
    OBJECTS OF THE INVENTION An object of the present invention is to provide a method for controllingoperation of suspension bellows for a vehicle tag axle of a vehicle whichreduces the risk of the suspension bellows being damaged.
    Another object of the present invention is to provide a system for controllingoperation of suspension bellows for a vehicle tag axle of a vehicle whichreduces the risk of the suspension bellows being damaged.
    SUMMARY OF THE INVENTION These and other objects, apparent from the following description, areachieved by a method, a system, a vehicle, a computer program and acomputer program product as set out in the appended independent claims.Preferred embodiments of the method and the system are defined inappended dependent claims.
    Specifically an object of the invention is achieved by a method for controllingoperation of suspension bellows for a vehicle tag axle of a vehicle. The tagaxle is being elevated by means of a tag axel elevation function in a parkingstate of the vehicle. The suspension bellows are being exhausted to aresidual pressure in said parking state of the vehicle. The method comprisesthe steps of: determining a current pressure of said suspension bellows in connection to starting up the vehicle; and, if the pressure is below a desiredresidual pressure, controlling the pressure to obtain said desired residualpressure.
    The tag axle is movable between a support level in which the wheels of thetag axle are providing an extra support for the vehicle, and an elevatedposition in which the wheels of the tag axle are elevated from the ground.The tag axel elevation function may be provided by means of any suitable tagaxle elevation means such as hydraulic elevation means or pneumatic elevation means.
    The invention thus relates to the situation where the tag axle is elevated andthe suspension bellows of the tag axle have been exhausted. The tag axlemay already be elevated before the vehicle is parked or be elevated inconnection to the parking of the vehicle. The feature: “The tag axle is beingelevated by means of a tag axel elevation function in a parking state of thevehicle” thus comprlses the tag axle already being elevated prior to theparking state of the vehicle or that the tag axle is being elevated as thevehicle has entered the parking state.
    By thus determining a current pressure of said suspension bellows inconnection to starting up the vehicle and controlling the pressure to obtain adesired residual pressure if the pressure is below a desired residual pressurethe risk of pressure being too low due to failure of the tag axle elevationfunction having resulted in lowered tag axle can be avoided, and the residualpressure being obtained prior to an elevation of the tag axle. Hereby the riskof the suspension bellows for a vehicle tag axle being damaged is reducedsince the residual pressure will be at the desired level in connection to apossible tag axle elevation.
    According to an embodiment of the method the step of controlling thepressure to obtain said desired residual pressure is performed prior toactivating said tag axel elevation function. Hereby the risk of the suspension bellows for a vehicle tag axle being damaged is further reduced since theresidual pressure will be secured prior to activation of elevation function andthus prior to a possible elevation of the tag axle.
    Specifically an object of the invention is achieved by a system for controllingoperation of suspension bellows for a vehicle tag axle of a vehicle. The tagaxle is arranged to be elevated by means of a tag axel elevation function in aparking state of the vehicle. The suspension bellows are arranged to beexhausted to a residual pressure in said parking state of the vehicle. Thesystem comprises means for determining a current pressure of saidsuspension bellows in connection to starting up the vehicle; and means forcontrolling the pressure to obtain said desired residual pressure if thepressure is below a desired residual pressure.
    According to an embodiment of the system the means for controlling thepressure to obtain said desired residual pressure is arranged to be performedprior to activating said tag axel elevation function.
    The system for controlling operation of suspension bellows for a vehicle tagaxle of a vehicle is adapted to perform the methods as set out herein.
    The system according to the invention has the advantages according to thecorresponding method claims.
    Specifically an object of the invention is achieved by a vehicle comprising asystem according to the invention as set out herein.
    Specifically an object of the invention is achieved by a computer program forcontrolling operation of suspension bellows for a vehicle tag axle of a vehicle,said computer program comprising program code which, when run on anelectronic control unit or another computer connected to the electronic controlunit, causes the electronic control unit to perform the steps according to the invention.
    A computer program product comprising a digital storage medium storing thecomputer program according to the invention.
    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. ta schematically illustrates a side view of a vehicle with a tag axle in asupport position according to the present invention; Fig. 1b schematically illustrates a side view of a vehicle in fig. ta with the tagaxle in an elevated position and exhausted suspension bellows for the tagaxle according to an embodiment of the present invention; Fig. 1c schematically illustrates a side view of a vehicle in fig. 1b wherefailure in the tag axle elevation function has resulted in a non-elevatedposition of the tag axle according to an embodiment of the present invention; Fig. 2 is a schematic plan view of the vehicle in fig. 1 showing its chassis andair suspension system; Fig. 3 schematically illustrates a system for controlling operation ofsuspension bellows for a vehicle tag axle of a vehicle according to anembodiment of the present invention; Fig. 4 schematically illustrates a block diagram of a method for controllingoperation of suspension bellows for a vehicle tag axle of a vehicle accordingto an embodiment of the present invention; and Fig. 5 schematically illustrates a computer according to an embodiment of the present invention.
    DETAILED DESCRIPTION Hereinafter the term “link” refers to a communication link which may be aphysical connector, such as an optoelectronic communication wire, or a non-physical connector such as a wireless connection, for example a radio ormicrowave link.
    Hereinafter the term “parking state of the vehicle' refers to any stop of thevehicle where the tag axle is elevated and the bellows for the tag axle areexhausted to a residual pressure. The term 'parking state of the vehicle”refers to any stop of the vehicle at any position such as at a parking space,along a road on the side of the road, in a garage or the like. The term“parking state of the vehicle” may be that the operator of the vehicle hasstopped the vehicle at a certain position and left the vehicle for the night orhas temporarily stopped the vehicle for e.g. a rest in the vehicle or the like.
    Fig. 1a schematically illustrates a side view of a vehicle with a tag axle in asupport position according to the present invention.
    The vehicle is situated on a ground G. The exemplified vehicle 1 is a heavyvehicle in the shape of a truck. The vehicle according to the present inventioncould be any vehicle having an air suspension system with bellows unitssuch as a bus or a car. The vehicle 1 in this embodiment has a forwardwheeled axle X1 with opposite front wheels of which the left wheel LF isshown, a powered rear wheeled axle X2 with opposite tractive wheels ofwhich the left wheel LD is shown, and a rear tag axle X3 with opposite tagaxle wheels of which the left wheel LS is shown. The vehicle is provided witha system I for controlling operation of suspension bellows for a vehicle tagaxle of a vehicle.
    The vehicle is further provided with an air suspension system comprising abellows configuration which comprises a set of bellows of which a bellows unit B2 situated on the left side close to the forward axle X1, a bellows unitB4 situated on the left side close to the powered rear axle X2, and a bellowsunit B6 situated on the left side close to the tag axle X3 are shown. Thebellows B2, B4, B6 are filled with air for providing air suspension. Thebellows unit B6 of the tag axle thus have a certain volume V1.
    Fig. 1b schematically illustrates a side view of a vehicle in fig. 1a with the tagaxle X3 in an elevated position and exhausted suspension bellows for the tagaxle according to an embodiment of the present invention.
    The vehicle is in a parking state, i.e. the vehicle has stopped and beenparked and is intended to be used at a later stage. ln this parking state thetag axle X3 is in the elevated position in which the wheels LS of the tag axleX3 are elevated from the ground G. The tag axle X3 has been elevated bymeans of a tag axel elevation function. The tag axel elevation function maybe provided by means of any suitable tag axle elevation means such ashydraulic elevation means or pneumatic elevation means. The suspensionbellows B6 for the tag axle of the vehicle are being exhausted to a residualpressure in said parking state of the vehicle, wherein the volume V2 of thebellows unit B6 of the tag axle X3 is less than the volume V1 in fig. 1a.
    Fig. 1c schematically illustrates a side view of a vehicle in fig. 1b wherefailure in the tag axle elevation function has resulted in a non-elevatedposition of the tag axle according to an embodiment of the present invention.
    The failure in the tag axle elevation function is e.g. due to a leakage in a tagaxle elevation means resulting in the tag axle not being kept in the elevatedposition but lowered towards the ground over time as the vehicle is in theparking state. This results in the bellows unit B6 being stretched such that thevolume is increased to a volume V3 resulting in a reduction in pressure suchthat the residual pressure is not kept. ln connection to starting up the vehicle 1 after the vehicle has been in theparking state and wherein the tag axle X3 has been lowered due to said failure, the current pressure of said suspension bellows of the tag axle isdetermined. The pressure determined is below the desired residual pressure,wherein the pressure is controlled to obtain said desired residual pressure.
    Controlling the pressure to obtain said desired residual pressure is arrangedto be performed prior to activating the tag axel elevation function.
    Fig. 2 is a schematic plan view of the vehicle in fig. 1 showing its chassis andair suspension system. The vehicle comprises a frame 2, 3, a forward axleX1 with opposite front wheels RF, LF, a powered rear axle X2 with oppositetractive wheels RD, LD and a rear tag axle X3 with opposite tag axle wheelsRS, LS. The vehicle is further provided with an air suspension systemcomprising a set of air suspension bellows which comprises a first bellowsunit B1 situated on the right side close to the forward axle X1 and a secondbellows unit B2 situated on the left side close to the forward axle X1. Each ofthe first and second bellows units B1, B2 comprises a pair of bellows whichare air-connected to one another, with one bellows situated on each side ofthe axle X1. The set of air suspension bellows further comprises a thirdbellows unit B3 situated on the right side close to the powered rear axle X2and a fourth bellows unit B4 situated on the left side close to the poweredrear axle X2. The third and fourth bellows units B3, B4 each comprise a pairof bellows which are connected to one another, with one bellows situated oneach side of the axle X2.
    The set of air suspension bellows further comprises a fifth bellows unit B5situated on the right side close to the rear tag axle X3 and a sixth bellows unitB6 situated on the left side close to the rear tag axle X3. The fifth and sixthbellows units B5, B6 each comprise a pair of bellows air-connected to oneanother, with one bellows situated on each side of the axle X3. The fifth andsixth bellows units B5, B6 thus comprises suspension bellows B5, B6 for tagaxle X3 of the vehicle.
    The respective bellows units B1-B6 are according to an embodiment situatedbetween the vehicle frame 2, 3 and the respective axles.
    The air suspension system further comprises an air valve configuration 100according to an embodiment of the present invention. The air valveconfiguration 100 is connected to the set of air suspension bellows B1, B2,B3, B4, B5, B6 and is adapted to regulating the air pressure in the respectivebellows units B1, B2, B3, B4, B5, B6.
    The vehicle further comprises an air pressure source configuration 110 tosupply compressed air to the air valve configuration 100.
    The air valve configuration 100 comprises in one embodiment air valve unitscomprising valve means with an air intake connected to a compressed airsource, a venting outlet and a supply outlet, and valve means adapted toregulating the air pressure in the bellows units.
    The air suspension system comprises means P1, P2, P3, P4, P5; P6 fordetermining and monitoring the pressure of the set of suspension bellowscomprising determining the pressure in the respective bellows units B1, B2,B3, B4, B5, B6. The means P1, P2, P3, P4, P5; P6 comprises pressuresensor units P1, P2, P3, P4, P5; P6, comprising a first pressure sensor unitP1 arranged to sense the pressure in the first bellows unit B1, a secondpressure sensor unit P2 arranged to sense the pressure in the secondbellows unit B2, a third pressure sensor unit P3 arranged to sense thepressure in the third bellows unit B3, a fourth pressure sensor unit P4arranged to sense the pressure in the fourth bellows unit B4, a fifth pressuresensor unit P5 arranged to sense the pressure in the fifth bellows unit B5,and a sixth pressure sensor unit P6 arranged to sense the pressure in thesixth bellows unit B6. The pressure sensor units P1, P2, P3, P4, P5; P6 areaccording to an embodiment comprised in means for determining Ieakage ina bellows unit B1, B2, B3, B4, B5, B6. The pressure sensor units P1, P2, P3, P4, P5; P6 are according to an embodiment comprised in means fordetermining the extent of leakage in a bellows unit B1, B2, B3, B4, B5, B6.
    The pressure sensor units P1, P2, P3, P4, P5; P6 are operably connected tothe electronic control unit 200 via links. The electronic control unit 200 is viathe links arranged to receive signals from the pressure sensor units P1, P2,P3, P4, P5; P6 representing pressure data in the respective bellows so as todetermine the pressure in the respective bellows unit.
    The vehicle has a tag axle elevation means 230 for providing a tag axleelevation function for elevating the tag axle X3 to an elevated position. Thetag axel X3 is arranged to be elevated by means of the tag axle elevationmeans 230 and is according to an embodiment elevated in a parking state ofthe vehicle.
    When the tag axle X3 is in the elevated state, the valve configuration 100 isarranged to exhaust the suspension bellows B5, B6 for the tag axle X3, i.e.the pressure of the fifth bellows unit B5 and the sixth bellows unit B6, to aresidual pressure. The suspension bellows B5, B6 for the tag axle X3 arethus exhausted in said parking state of the vehicle when the tag axle X3 isbeing elevated. The pressure sensor units P5 and P6 are arranged todetermine the current pressure of the suspension bellows B5, B6 for the tagaxle X3, i.e. the pressure of the fifth bellows unit B5 and the sixth bellows unitB6, in connection to starting up the vehicle after the vehicle has been in aparking state. The valve configuration 100 is arranged to control the pressureto obtain said desired residual pressure if the pressure is below a desiredresidual pressure.
    Fig. 3 schematically illustrates a system I for controlling operation ofsuspension bellows for a vehicle tag axle of a vehicle according to anembodiment of the present invention.
    The tag axle is arranged to be elevated by means of a tag axel elevationfunction in a parking state of the vehicle. The suspension bellows are 11 arranged to be exhausted to a residual pressure in said parking state of thevehicle.
    The system comprises an electronic control unit 200.
    The system I comprises according to an embodiment means 210 fordetermining the pressure in said air suspension bellows for the tag axle. Themeans 210 for determining the pressure in said level suspension bellowscomprises one or more pressure sensor units, e.g. pressure sensor units P5, P6 in accordance with fig. 2.
    The system I comprises according to an embodiment means 220 forcontrolling the air suspension bellows of the tag axle. The means 220 forcontrolling the air suspension bellows comprises an air valve configurationconnected to the set of air suspension bellows and adapted to regulating thesupply of air to/from the respective bellows. The valve configurationcomprises according to an embodiment valve members and means forcontrolling the valve members for controlling the supply of air to/from therespective bellows. The means 220 for controlling the air suspension bellowsis according to an embodiment arranged to control the set of air suspensionbellows of the air suspension system of the vehicle.
    The means 220 for controlling the air suspension bellows of the tag axlecomprises means 222 for exhausting said bellows to a residual pressureduring parking state of the vehicle. The means 222 for exhausting thebellows to a residual pressure may comprise any suitable valve configurationcomprising any suitable valve members and means for controlling the valvemembers for regulating and thus exhausting air from said bellows.
    The means 220 for controlling the air suspension bellows of the tag axlecomprises means 224 for controlling the pressure to obtain said desiredresidual pressure if the pressure is below a desired residual pressure. Themeans 224 for controlling the pressure to obtain said desired residualpressure if the pressure is below a desired residual pressure may comprise 12 any suitable valve configuration comprising any suitable valve members andmeans for controlling the valve members for regulating and thus exhaustingair from said bellows.
    The system I comprises according to an embodiment tag axle elevationmeans 230 for providing a tag axle elevation function for elevating the tagaxle to an elevated position. The tag axle elevation means 230 for providingthe tag axle elevation function may be any suitable tag axle elevation means such as hydraulic elevation means or pneumatic elevation means.
    The tag axle elevation means 230 comprises means for determining theposition of the tag axle. The means for determining the position of the tagaxle comprises according to an embodiment determining the energizationlevel of the tag axle elevation means 230, e.g. the hydraulic pressure level fora hydraulic tag axel elevation means, or the air pressure for a pneumatic tagaxel elevation means, so as to determine whether the tag axel is/hasremained in the elevated position.
    According to an embodiment of the system I the means 224 for controllingthe pressure to obtain said desired residual pressure is arranged to beperformed prior to activating said tag axel elevation function. The means 210for determining the pressure in the bellows for the tag axle is according to anembodiment arranged to be performed in connection to starting up thevehicle.
    The system I comprises according to an embodiment means 240 fordetermining the operational status of the vehicle.
    The means 240 for determining the operational status of the vehiclecomprises means 242 for determining if the vehicle is in a parking state. Themeans 242 for determining if the vehicle is in a parking state may compriseany suitable means for determining a parking state comprising means fordetermining engine operation, means for determining position of the vehicleor the like. 13 The means 240 for determining the operational status of the vehiclecomprises means 244 for determining starting up of the vehicle. The means244 for determining starting up of the vehicle may comprise any suitablesensor unit for sensing activation of engine.
    The electronic control unit 200 is operably connected to the means 210 fordetermining the pressure in said air suspension bellows for the tag axle via alink 10. The electronic control unit 200 is via the link 10 arranged to receive asignal from the means 210 representing data for current pressure in said airsuspension bellows for the tag axle.
    The electronic control unit 200 is operably connected to the means 220 forcontrolling the air suspension bellows of the tag axle via a link 20a. Theelectronic control unit 200 is via the link 20a arranged to send a signal to themeans 220 representing data for current pressure of the bellows.
    The electronic control unit 200 is operably connected to the means 220 forcontrolling the air suspension bellows of the tag axle via a link 20b. Theelectronic control unit 200 is via the link 20b arranged to receive a signal fromthe means 220 representing data for controlling the bellows.
    The electronic control unit 200 is operably connected to the means 222 forexhausting said bellows to a residual pressure during parking state of thevehicle via the link 22a arranged to send a signal to the means 222representing data for parking state of the vehicle.
    The electronic control unit 200 is operably connected to the means 222 forexhausting said bellows to a residual pressure during parking state of thevehicle via a link 22b. The electronic control unit 200 is via the link 22barranged to receive a signal from the means 222 representing data forexhausting said bellows to a residual pressure.
    The electronic control unit 200 is operably connected to the means 224 forcontrolling the pressure to obtain said desired residual pressure if the 14 pressure is below a desired residual pressure via the link 24a arranged tosend a signal to the means 224 representing data for current pressure anddata for starting up of vehicle.
    The electronic control unit 200 is operably connected to the means 224 forcontrolling the pressure to obtain said desired residual pressure if thepressure is below a desired residual pressure via a link 24b. The electroniccontrol unit 200 is via the link 24b arranged to receive a signal from themeans 224 representing data for controlling the pressure to obtain saiddesired residual pressure.
    The electronic control unit 200 is operably connected to the tag axle elevationmeans 230 for providing a tag axle elevation function for elevating the tagaxle to an elevated position via the link 30a arranged to send a signal to themeans 230 representing data for current tag axle position and data forvehicle parking state.
    The electronic control unit 200 is operably connected to the tag axle elevationmeans 230 for providing a tag axle elevation function for elevating the tagaxle to an elevated position via a link 30b. The electronic control unit 200 isvia the link 30b arranged to receive a signal from the means 230representing data for activating tag axle elevation function for elevating thetag axle.
    The electronic control unit 200 is operably connected to the means 240 fordetermining the operational status of the vehicle via a link 40. The electroniccontrol unit 200 is via the link 40 arranged to receive a signal from the means240 representing data for operational status of the vehicle.
    The electronic control unit 200 is operably connected to the means 242 fordetermining if the vehicle is in a parking state via a link 42. The electroniccontrol unit 200 is via the link 42 arranged to receive a signal from the means242 representing data for whether the vehicle is in a parking state.
    The electronic control unit 200 is operably connected to the means 244 fordetermining starting up of the vehicle via a link 44. The electronic control unit200 is via the link 44 arranged to receive a signal from the means 244representing data for whether the vehicle is starting up.
    Fig. 4 schematically illustrates a block diagram of a method for controllingoperation of suspension bellows for a vehicle tag axle of a vehicle.
    According to an embodiment the method for controlling operation ofsuspension bellows for a vehicle tag axle of a vehicle comprises a step S1. lnthis step, in a parking state of the vehicle, the tag axle is elevated and thesuspension bellows for the tag axle are exhausted.
    According to an embodiment the method for controlling operation ofsuspension bellows for a vehicle tag axle of a vehicle comprises a step S2. lnthis step, in connection to starting up the vehicle, a current pressure of saidsuspension bellows is determined.
    According to an embodiment the method for controlling operation ofsuspension bellows for a vehicle tag axle of a vehicle comprises a step S3. lnthis step, if pressure is below a desired residual pressure, the pressure iscontrolled to obtain said desired residual pressure.
    The tag axle is movable between a support level in which the wheels of thetag axle are providing an extra support for the vehicle, and an elevatedposition in which the wheels of the tag axle are elevated from the ground.The tag axel elevation function may be provided by means of any suitable tagaxle elevation means such as hydraulic elevation means or pneumatic elevation means.
    The invention thus relates to the situation where the tag axle is elevated andthe suspension bellows of the tag axle have been exhausted. The tag axlemay already be elevated before the vehicle is parked or be elevated inconnection to the parking of the vehicle. The feature: “The tag axle is being 16 elevated by means of a tag axel elevation function in a parking state of thevehicle” thus comprises the tag axle already being elevated prior to theparking state of the vehicle or that the tag axle is being elevated as thevehicle has entered the parking state.
    By thus determining a current pressure of said suspension bellows inconnection to starting up the vehicle and controlling the pressure to obtain adesired residual pressure if the pressure is below a desired residual pressurethe risk of pressure being too low due to failure of the tag axle elevationfunction having resulted in lowered tag axle can be avoided, and the residualpressure being obtained prior to an elevation of the tag axle. Hereby the riskof the suspension bellows for a vehicle tag axle being damaged is reducedsince the residual pressure will be at the desired level in connection to apossible tag axle elevation.
    According to an embodiment of the method the step of controlling thepressure to obtain said desired residual pressure is performed prior toactivating said tag axel elevation function. Hereby the risk of the suspensionbellows for a vehicle tag axle being damaged is further reduced since theresidual pressure will be secured prior to activation of elevation function andthus prior to a possible elevation of the tag axle.
    With reference to figure 5, a diagram of an apparatus 500 is shown. Thecontrol unit 200 described with reference to fig. 2 and 3 may according to anembodiment comprise apparatus 500. Apparatus 500 comprises a non-volatile memory 520, a data processing device 510 and a read/write memory550. Non-volatile memory 520 has a first memory portion 530 wherein acomputer program, such as an operating system, is stored for controlling thefunction of apparatus 500. Further, apparatus 500 comprises a bus controller,a serial communication port, I/O-means, an A/D-converter, a time date entryand transmission unit, an event counter and an interrupt controller (notshown). Non-volatile memory 520 also has a second memory portion 540. 17 A computer program P is provided comprising routines for controllingoperation of suspension bellows for a vehicle tag axle of a vehicle. Theprogram P comprises routines for elevating the tag axle and exhausting thesuspension bellows for the tag axle ln a parking state of the vehicle. Theprogram P comprises routines for determining a current pressure of saidsuspension bellows in connection to starting up the vehicle. The program Pcomprises routines for controlling the pressure to obtain said desired residualpressure if the pressure is below a desired residual pressure. The routinesfor controlling the pressure to obtain said desired residual pressure isperformed prior to activating said tag axel elevation function. The computerprogram P may be stored in an executable manner or in a compressed condition in a separate memory 560 and/or in read/write memory 550.
    When it is stated that data processing device 510 performs a certain functionit should be understood that data processing device 510 performs a certainpart of the program which is stored in separate memory 560, or a certain partof the program which is stored in read/write memory 550.
    Data processing device 510 may communicate with a data communicationsport 599 by means of a data bus 515. Non-volatile memory 520 is adaptedfor communication with data processing device 510 via a data bus 512.Separate memory 560 is adapted for communication with data processingdevice 510 via a data bus 511. Read/write memory 550 is adapted forcommunication with data processing device 510 via a data bus 514. To thedata communications port 599 e.g. the links connected to the control unit 100may be connected.
    When data is received on data port 599 it is temporarily stored in secondmemory portion 540. When the received input data has been temporarilystored, data processing device 510 is set up to perform execution of code ina manner described above. The signals received on data port 599 can beused by apparatus 500 for elevating the tag axle and exhausting thesuspension bellows for the tag axle ln a parking state of the vehicle. The 18 signals received on data port 599 can be used by apparatus 500 fordetermining a current pressure of said suspension bellows in connection tostarting up the vehicle. The signals received on data port 599 can be used byapparatus 500 for controlling the pressure to obtain said desired residualpressure if the pressure is below a desired residual pressure. The signalsreceived on data port 599 used by apparatus 500 for controlling the pressureto obtain said desired residual pressure is performed prior to activating saidtag axel elevation function.
    Parts of the methods described herein can be performed by apparatus 500by means of data processing device 510 running the program stored inseparate memory 560 or read/write memory 550. When apparatus 500 runsthe program, parts of the methods described herein are executed.
    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 aresuited to the particular use contemplated.
    权利要求:
    Claims (7)
    [1] 1. A method for controlling operation of suspension bellows (B5, B6) for avehicle tag axle (X3) of a vehicle (1), said tag axle (X3) being elevated bymeans of a tag axel elevation function in a parking state of the vehicle, saidsuspension bellows being exhausted (S1) to a residual pressure in saidparking state of the vehicle (1 ), characterized by the steps of: - determining (S2) a current pressure of said suspension bellows (B5, B6)in connection to starting up the vehicle (1); and, - if the pressure is below a desired residual pressure, controlling (S3) thepressure to obtain said desired residual pressure.
    [2] 2. A method according to claim 1, wherein the step of controlling thepressure to obtain said desired residual pressure is performed prior toactivating said tag axel elevation function.
    [3] 3. A system (I) for controlling operation of suspension bellows (B5, B6) for avehicle tag axle (X3) of a vehicle (1), said tag axle (X3) being arranged to beelevated by means of a tag axel elevation function in a parking state of thevehicle (1), said suspension bellows (B5, B6) being arranged to beexhausted to a residual pressure in said parking state of the vehicle (1),characterized by means (210) for determining a current pressure of saidsuspension bellows in connection to starting up the vehicle (1); and means(224) for controlling the pressure to obtain said desired residual pressure ifthe pressure is below a desired residual pressure.
    [4] 4. A system according to claim 1, wherein the means (224) for controllingthe pressure to obtain said desired residual pressure is arranged to beperformed prior to activating said tag axel elevation function.
    [5] 5. A vehicle (1) comprising a system (I) according to any of claims 3-4.
    [6] 6. A computer program (P) for controlling operation of suspension bellowsfor a vehicle tag axle of a vehicle, said computer program (P) comprising program code which, when run on an electronic control unit (100) or anothercomputer (500) connected to the electronic control unit (100), causes theelectronic control unit to perform the steps according to claim 1-2.
    [7] 7. A computer program product comprising a digital storage medium storingthe computer program according to claim 6.
    类似技术:
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    同族专利:
    公开号 | 公开日
    SE542764C2|2020-07-07|
    DE102017001427A1|2017-09-07|
    DE102017001427B4|2021-10-21|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE102009011606A1|2008-09-24|2010-05-20|Wabco Gmbh|Device and method for carrying out a wheelbase control for commercial vehicles|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1650283A|SE542764C2|2016-03-03|2016-03-03|Method and system for controlling operation of suspension bellows for a vehicle tag axle|SE1650283A| SE542764C2|2016-03-03|2016-03-03|Method and system for controlling operation of suspension bellows for a vehicle tag axle|
    DE102017001427.2A| DE102017001427B4|2016-03-03|2017-02-14|Method and system for controlling the operation of suspension bellows for a vehicle trailing axle|
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