• 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 invention relates to a method for driving a continuously variable transmission (10) with hydrostatic / mechanical torque division, which transmission (10) is coupled to an internal combustion engine (11) via an input driving shaft (12) and has a first hydrostatic unit ( H1) acting as a pump and at least one second hydrostatic unit (H2) acting as a motor, which are hydraulically connected to each other in a circuit by means of pressure lines (29, 30) and form a hydrostatic branch of the transmission (10), and which transmission (10) further comprises a planetary gear (13) for dividing the force available at the input driving shaft (12) between the hydrostatic and the mechanical branch of the transmission (10). Adjusting the traction force with a predeterminable traction characteristic made possible by the fact that the stroke volume of the first hydrostatic unit (H1) and the stroke volume of the at least one second hydrostatic unit (H2) can be adjusted independently e of each other, and that the adjustment of the stroke volumes takes place in accordance with the high pressure prevailing in the hydraulic circuit of the hydrostatic units (H1, H2).
    公开号:SE1150736A1
    申请号:SE1150736
    申请日:2011-08-10
    公开日:2012-02-12
    发明作者:Markus Liebherr；Erich Eckhardt；Patrick Wohlhauser；Peter Dziuba；Josef Haeglsperger；Franz-Josef Schwede
    申请人:Mali Holding Ag；
    IPC主号:
    专利说明:

    1015202530SUMMARY OF THE INVENTIONIt is therefore an object of the invention to provide onecorresponding procedure and to effect a transmission ofthis kind of performing the procedure.The object is achieved by the features of claims 1 and 4.
    The method according to the invention for operating a continuoushighly variable transmission with hydrostatic / mechanical torquedivision, which transmission is connected to a combustionmotor via an input drive shaft and has a firsthydrostatic unit acting son1 a pump and, at least oneother hydrostatic units acting as an engine, which arehydraulically connected to each other in a circuit of pressure linesand forms a hydrostatic branch of the transmission, andwhich transmission further comprises a planetary gear fordivide the force available on the input drive shaftbetween the hydrostatic and mechanical branches of the trans-mission, is characterized by the fact1 that the stroke volume of itthe first hydrostatic unit and the displacement of the minimumstone a second hydrostatic unit can be adjusted independentlyof each other, and that the adjustment of the stroke volumes takes place inin accordance with the high pressure prevailing in the hydraulic circuit.then in the hydrostatic units.
    An embodiment of the method according to the invention is known.is characterized by the at least one second hydrostatic unitis driven in the area by its maximum stroke volume in a starting area,and by the stroke volume of the first hydrostatic unitcontrolled to control the driving force.
    An embodiment of the method according to the invention is known.is characterized by the stroke volume of the first hydrostatic unitP: pat1anor docs doctemp II ~ Application text.201l08l001531926627.docx, 2011-08-10 1l0037EN1015202530is set by means of a spring-centered setting systemwhich is affected by a setting pressure that is proportionalagainst the speed, and by the first hydrostatic unitcontrolled in such a way that the setting forces, which are proportionateagainst the high pressure, in cooperation with the spring centerthe setting system and the setting pressure proportionaldesired driving force oragainst the speed, it generatesthe torque characteristics.
    The transmission according to the invention for carrying out proceduresit is connected according to the invention to an internal combustion enginevia an input drive shaft and has a first hydrostaticunit acting as a pump and at least one second hydrostatictechnical unit acting as an engine, which are hydraulically coupledadded to each other in a circuit via pressure lines and forma hydrostatic branch of the transmission, the stroke volumesfor the hydrostatic units can be adjusted independentlyeach other using the corresponding setting system, andwherein a planetary gear is further arranged for dividingthe force available on the input drive shaft between ithydrostatic and the mechanical branch of the transmission.
    The transmission is characterized by the fact that it is a controlwhich is connected to the output of a pressure switchtransducers connected to the pressure lines and which, by means ofcorresponding control valves, control setting pistons forstabilization of the stroke volumes of the hydrostatic units,which pistons are connected to a setting pressure line.
    An embodiment of the transmission according to the invention is known.is characterized by the setting piston for the first hydrostaticthe unit is designed as a spring-centered settingpiston.
    P: pat1anor docs doctemp II ~ Application text.201l08l001531926627.docx, 2011-08-10 1l0037EN1015202530Another embodiment of the transmission according to the inventioncharacterized by a speed sensor connected to the controlis arranged on the input drive shaft.
    Another embodiment of the transmission according to the inventioncharacterized in that a plurality of input devices,acceleration and braking, are connected to the steeringningen.
    Another embodiment of the transmission according to the inventioncharacterized in that, for reversing the direction of rotation,the first hydrostatic unit can be rotated in opposite directionsfrom zero position, and that a selector switch toswitch between forward driving and reverse driving is connectedto the steering.
    Another embodiment of the transmission according to the inventioncharacterized in that the input drive shaft is coupledto the planet carrier of the planetary gear through. that the firstthe hydrostatic unit is connected to the ring of the planetarythe gear unit and that it has at least one second hydrostatic unitis connected to the sun gear of the planetary gear and to itoutput drive shaft.
    Another embodiment of the transmission according to the inventioncharacterized by the design of the hydrostatic unitsas hydrostatic units with inclined axes.Yet another embodiment of the transmission according to the inventioncharacterized by a number of other hydrostatic unitsof the same kind are provided.
    P: pat1anor docs doctemp II ~ Application text.201l08l001531926627.docx, 2011-08-10 1l0037EN1015202530DESCRIPTION OF THE DRAWINGSThe invention will * now * be explained in more detail herebelow with reference to exemplary embodiments illustrated byusing the drawing, where:Fig. 1 shows the transmission layout for a transmission inaccording to an embodiment of the invention.
    DESCRIPTION OF PREFERRED EMBODIMENTSThe present invention relates to a continuousvariable transmission with hydrostatic / mechanical torquesharing. The transmission layout for such a transmission isshown in Figure 1. The transmission 10 in Figure 1 is via ainput drive shaft 12 coupled to an internal combustion engine11, symbolized by a crankshaft. The input drive shaftis connected to the planet carrier 14 and the planet gears 15 of aplanetary gear 13, which is responsible for dividing thethe power from an internal combustion engine 11 between a hydrostatictechnical branch of the transmission and a mechanical branch of thethe mission. The hydrostatic branch is formed by twostatic units H1 and H2, which are suitably designed asinclined shaft hydrostatic units with a wide torqueangle. The two hydrostatic units H1, H2 can beloaded independently of each other with respect to their stroke volume.
    The first hydrostatic unit H1 acts as a pump, whilethe second hydrostatic unit H2 is driven as a motor.
    The first hydrostatic unit H1 is with its hydrostatic shaft25, via a gear mechanism comprising the gears 18, 19and a hollow shaft 20, coupled to the ring 16 of the planetarygear 13. The second hydrostatic unit H2 is on one sideby means of its hydrostatic shaft 24, via a gear mechanism comprisingthe gears 22 and 23 and a central shaft 20, coupled toP: pat1anor docs doctemp II ~ Application text.201l08l001531926627.docx, 2011-08-10 1l0037EN1015202530planetary gear 13 sun wheels; and on the other hand it is of cog-wheels 27 and 28 coupled to an output drive shaft 26. Hydro-the state axis 24 simultaneously serves as a summing axis forsum up the forces transferred via the individual branches.
    The stroke volume of the first hydrostatic unit H1 is adjustedby means of a spring-centered adjusting piston 33, which rotatesthe yoke of the first hydrostatic unit H1 by means of aadjustment mechanism1 32. Setting piston. 33 coupled selec-tive, with. using 'two control valves * 37 and. 38, to asetting pressure line 39, via which a corresponding inputposition pressure depending. the speed of the combustion enginetower 11 acts on one side of the setting piston or * denOther. The control valves 37 and 38 are controlled by a central controlning 40.
    The stroke volume of the other hydrostat unit. H2 is adjusted withby means of another setting piston 34, which by means of aanother control valve 36 is connected to the setting pressure line39. The control valve 36 is also connected to the centertraal control 40.
    The two hydrostatic units H1 and H2 are hydraulicconnected to each other via two pressure lines 29 and 30 fortocreate a circuit and. form the hydrostatic branch ofthe transmission 10. The mechanical branch is formed by parts ofplanetary gear 13,23.the central shaft 20 and the gears 22 andFrom a speed sensor 35 arranged on the input drivethe shaft 12 provides the controller 40 with information on the speed atthe input side of the transmission 10. Via a pressure transducer 21connected to the hydraulic circuit of the hydraulic unitsterna H1, H2,the control receives further information about, itP: pat1anor docs doctemp II ~ Application text.201l08l001531926627.docx, 2011-08-10 1l0037EN1015202530high pressures prevailing in the circuit. It is possible to make in-external grip into the guide 40 via a plurality of inputdevices 41, 42, 43 for acceleration, braking and creepdriving and. via a selector switch 44 to switchbetween a neutral position, driving forward V and driving backwards R.
    The special feature of the transmission 10 is that itsconstruction. and controls are designed in such a way that itthe output torque of the output drive shaft 26 cancontrolled in any desired manner. The transmission shown10 is designed so that the power transmission is 100%static during the start-up process and continuously reduced byincreasing driving speed (an increasing mechanical force component). Theit is thus possible to take full advantage of thestart and reversal. Therostatic power transmission atthere is especially a wear-free relationship, optimalfine adjustment and, when the transmission 10 is used in a wheel loader,tare variable regulation of the traction, this is achieved byvariable pressure control of the first hydrostatic unitH1 which acts as a pump.
    The benefits of regulating traction, namely avoidanceof slipping and well-controlled and jerk-free driving is requiredespecially in the low or start driving range (0 to 6 km / h).
    Depending on the characteristics of the transmission 10, the hydrostaticpower transmission with the first hydrostatic unit H1as a pump and the other hydrostatic unit H2 as amotor designed in such a way that the second hydrostatic unitor the engine H2 is set for a large stroke volume and consequenta high output torque in the range from 0 to 8 km / h.
    Regulation of the traction force can thus be limited to thehydrostatic unit H1, and this facilitatesgovernance and significantly reduces costs.
    P: pat1anor docs doctemp II ~ Application text.201l08l001531926627.docx, 2011-08-10 1l0037EN1015202530In the present case, the regulation of the outgoing poweror the regulation of the moment that the circuit pressure of thethe hydrostatic units rise in proportion to the outputthe torque at the output drive shaft 26, and thus utilizesall the varied designs the circuit pressure of thestatic units as a measurement signal for the controller 40. It isa condition here that the control area should be hydrostaticdesigned in such a way that none of the mechanical shift pointshave a negative influence in the area of regulation, and thisis possible in the present transmission 10.
    It is a prerequisite for this type of regulation that itit should be possible to regulate the first and second hydrostaticthe units or the primary and secondary units H1 and H2separate. In the illustrative design shown in Figure 1the second hydrostatic unit or secondary unit is controlledH2 EL-proportional in accordance with the profile of the outgoingthe speed.
    Control of the first hydrostatic unit H1 is performed on suchway to the setting forces, which are proportional tocircuit pressure, in conjunction. with the spring-centered settingthe setting piston 33 and the settingthe pressure, proportional to the speed, from the settingthe pressure line 39 produces the required characteristicsfor the traction (or torque).
    Alternatively, the required signal can beeffective setting pistons are generated by means of a pressureand the required characteristics of the traction(hyd-It is advantageous here thatconnoisseur,can be generated by a preset proportional settingraw or electrohydraulic).
    P: pat1anor docs doctemp II ~ Application text.201l08l001531926627.docx, 2011-08-10 1l0037ENa working pump for lifting movements, which is arranged in the vehicle,can be operated with high feed rates at low cross speed.
    P: pat1anor docs doctemp II ~ Application text.201l08l001531926627.docx, 2011-08-10 1l0037EN
    权利要求:
    Claims (11)
    [1]
    Method for driving a continuously variable trans- (10) hydrostatic / mechanical (10) torque-splitting mission, which transmission (II) is connected to an internal combustion engine via an input drive shaft (12) and has a first hydrostatic unit (H1 ) acting as a pump and at least one second hydrostatic unit (H2) acting as a motor, which are hydraulically connected to each other in a circuit by means of pressure lines (29, 30) and form a hydrostatic branch of the transmission (10), and which transmission (10) further comprises a planetary gear (13) for dividing the force available at the input driving shaft (12) between the hydrostatic and the mechanical branch of the transmission (10), characterized in that the stroke volume of the the first hydrostatic unit (H1) and the stroke volume of the at least one second hydrostatic unit (H2) can be adjusted independently of each other, and by the adjustment of the stroke volumes in accordance with the high pressure prevailing in the hydraulic circuit of the hydrostatic units (H1, H2).
    [2]
    Method according to claim 1, characterized in that the at least one second hydrostatic unit (H2) is driven in the region of its maximum stroke volume in a starting area, and in that the stroke volume of the first hydrostatic unit (H1) is controlled to regulate the traction.
    [3]
    Method according to claim 2, characterized in that the stroke volume of the first hydrostatic unit (H1) is set by means of a spring-centered installation system (32, 33, 37, 38, 39) which is affected by a setting pressure which is proportional to speed , (H1) and by the fact that the first hydrostatic unit is controlled in such a way that the installation forces, which are proportional to the high pressure, in convergence P: pat1anor docs doctemp II ~ Application text.201l08l001531926627.docx , 2011-08-10 1l0037SE 10 15 20 25 30 ll kan med. the spring-centered setting system (32, 33, 37, 38, 39) and the setting pressure proportional to speed produce the desired traction or torque characteristics.
    [4]
    Transmission (10) for carrying out the method according to which transmission is coupled to one (12) one of claims 1-3, (11) via an input drive shaft and (H1) internal combustion engine has a first hydrostatic unit acting as a pump and at least one second hydrostatic unit (H2) acting as a motor, which are hydraulically connected to each other in a (29, 30) (10), (H1, H2) circuit by means of pressure lines and form a hydrostatic branch of the transmission, the displacement the hydrostatic units can be adjusted independently of each other by means of the corresponding setting systems (32, 33, 37, 38, 39), (10) and which (13) for stems 39 and 34, 36, respectively, further comprise a planetary gear division of the force available at the input driving shaft (12) between the hydrostatic and the mechanical branch of the transmission (10), characterized in that a guide (40) is provided. which is connected, to the output of a pressure transducer (21) connected to pressure lines (29, 30) and which, by means of corresponding control valves (36; 37, 38) control setting pistons (33, 34) for adjusting the stroke H2), (39). the glue of the hydrostatic units (H1, which pistons are connected to a set pressure line
    [5]
    Transmission according to Claim 4, characterized in that the setting piston (33) for the first (H1) hydrostatic unit is designed as a spring-centered setting piston. P: pat1anor docs doctemp II ~ Anskningstext.201l08l001531926627.docx, 2011-08-10 1l0037SE 5 10 15 20 25 30 12
    [6]
    6. Transmission. according to claim 4 or * 5, characterized in that a speed sensor coupled to the control is arranged on the input driving shaft (12). k å n n e - (41,
    [7]
    Transmission according to one of Claims 4 to 6, characterized in that a plurality of input devices 42, 43), in particular for acceleration and braking, are connected to the control (40).
    [8]
    Transmission according to one of Claims 4 to 7, characterized in that for reversing the direction of rotation, the first hydrostatic unit (H1) can be rotated in opposite directions from a zero position, and from a selector switch (44) for switching. 'between forward travel (V) and reverse (R) is connected to the steering (40).
    [9]
    Transmission according to one of Claims 4 to 8, characterized in that the input driving shaft (12) is coupled to the planet carrier (14) of the planetary shaft (13), in that the first (16) hydrostatic unit (H1) is coupled to the (13) (H2) ring of the planetary gearbox and to the fact that the at least one other hydrostatic unit is coupled to the sun gear (17) of the planetary gearbox (13) and to an output drive shaft (26).
    [10]
    Transmission according to one of Claims 4 to 9, characterized in that the hydrostatic units (H1, H2) are designed as hydrostatic units with inclined axes.
    [11]
    Transmission according to one of Claims 4 to 10, characterized in that a plurality of other hydrostatic units (H2) of the same type are arranged. P: pat1anor docs doctemp II ~ Application text.201l08l001531926627.docx, 2011-08-10 1l0037EN
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    同族专利:
    公开号 | 公开日
    DE102011108946A1|2012-02-16|
    CH703566A1|2012-02-15|
    CN102374269A|2012-03-14|
    JP2012037052A|2012-02-23|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
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    US4341132A|1981-02-13|1982-07-27|Burdick Clayton J|Continuously variable ratio power transmission|
    EP0234136B1|1986-02-24|1989-12-27|Shimadzu Corporation|Hydromechanical transmission|
    JP2646599B2|1987-07-31|1997-08-27|株式会社島津製作所|Continuously variable transmission|
    DE4425130A1|1993-08-17|1995-02-23|Sauer Sundstrand Gmbh & Co|Hydrostatic travelling drive with proportional pressure control|
    DE19523963A1|1995-06-30|1997-01-02|Fendt Xaver Gmbh & Co|Control unit incorporating clutch pedal|US9140356B2|2012-07-04|2015-09-22|Kanzaki Kokyukoki Mfg. Co., Ltd.|Travel control unit of working vehicle|
    FR3006272B1|2013-05-31|2015-06-05|Technoboost|METHOD AND DEVICE FOR CONTROLLING / CONTROLLING A DIFFERENTIAL HYDRAULIC MODULE FOR A HYBRID VEHICLE|
    CN103982652B|2014-06-06|2016-08-17|合肥工业大学|Power transfer confluxes variable speed drive|
    DE102016200233B3|2016-01-12|2017-02-23|Danfoss Power Solutions Gmbh & Co. Ohg|VARIABLE FOOD PUMP SYSTEM FOR CLOSED HYDRAULIC CIRCUITS|
    FR3057843B1|2016-10-25|2018-11-30|Poclain Hydraulics Industrie|VEHICLE DRIVE ASSISTANCE SYSTEM COMPRISING AN OPEN HYDRAULIC CIRCUIT|
    CN110805675B|2019-10-08|2020-11-24|长沙桑铼特农业机械设备有限公司|Multi-mode output integrated pump motor and application method thereof|
    法律状态:
    2012-08-07| NAV| Patent application has lapsed|
    优先权:
    申请号 | 申请日 | 专利标题
    CH01296/10A|CH703566A1|2010-08-11|2010-08-11|Method for operating a continuously variable transmission with hydrostatic-mechanical power split transmission as well as for performing the method.|
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