WO2009083220A1 - Système de transmission hydrostatique à régénération - Google Patents

Système de transmission hydrostatique à régénération Download PDF

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Publication number
WO2009083220A1
WO2009083220A1 PCT/EP2008/011025 EP2008011025W WO2009083220A1 WO 2009083220 A1 WO2009083220 A1 WO 2009083220A1 EP 2008011025 W EP2008011025 W EP 2008011025W WO 2009083220 A1 WO2009083220 A1 WO 2009083220A1
Authority
WO
WIPO (PCT)
Prior art keywords
pump
hydraulic pump
hydraulic
drive system
line
Prior art date
Application number
PCT/EP2008/011025
Other languages
German (de)
English (en)
Inventor
Rolf Rathke
Michael Frasch
Karlheinz Vogl
Seppo Tikkanen
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Priority to EP08867526A priority Critical patent/EP2238348A1/fr
Publication of WO2009083220A1 publication Critical patent/WO2009083220A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B23/00—Pumping installations or systems
    • F04B23/02—Pumping installations or systems having reservoirs
    • 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
    • B60K25/00—Auxiliary drives
    • B60K25/06—Auxiliary drives from the transmission power take-off
    • 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
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/08—Prime-movers comprising combustion engines and mechanical or fluid energy storing means
    • B60K6/12—Prime-movers comprising combustion engines and mechanical or fluid energy storing means by means of a chargeable fluidic accumulator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
    • B62D5/30—Safety devices, e.g. alternate emergency power supply or transmission means to ensure steering upon failure of the primary steering means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B23/00—Pumping installations or systems
    • F04B23/04—Combinations of two or more pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/4078—Fluid exchange between hydrostatic circuits and external sources or consumers
    • F16H61/4096—Fluid exchange between hydrostatic circuits and external sources or consumers with pressure accumulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/4148—Open loop circuits
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles

Definitions

  • the invention relates to a regenerative hydrostatic drive system, in particular for drives of mobile machines, such as wheel loaders.
  • Wheel loaders with a first and a second hydraulic pump are known from the prior art, which additionally have an emergency steering pump.
  • the first and the second hydraulic pump are each connected to a common first shaft and made adjustable.
  • the emergency steering pump is separately connected to a second shaft and can also be made adjustable.
  • the emergency steering pump can be swung out in both directions.
  • the first and the second shaft are each connected to a common primary drive machine and connected via a common transmission with a drive.
  • the first hydraulic pump is used to supply a control block for a working hydraulics.
  • the emergency steering pump is used to power a steering valve block when the vehicle is still in motion, but the pressure medium supply through the main steering pump fails.
  • the second hydraulic pump feeds either the steering valve block alone or the steering valve block and the control block simultaneously with pressure medium, as the main steering pump. This ensures that the steering valve block always gets sufficient pressure medium available, while excess pressure medium can be discharged to the control block.
  • the traction drive axle in the form of mechanical energy, or for later reuse to save.
  • the object of the invention is therefore to provide a regenerative hydrostatic drive system, can be reused with the excess hydraulic energy from the hydraulic system by means of a Notlenkpumpe.
  • the drive system comprises a travel drive, at least a first hydraulic pump and a second hydraulic pump and an emergency steering pump.
  • Hydraulic pumps is intended to supply a working hydraulics while the other is primarily intended to supply a hydraulic steering system.
  • the emergency steering pump is coupled to the travel drive and is provided to supply the hydraulic steering system.
  • the emergency steering pump according to the invention can also be connected to a hydraulic storage element.
  • the emergency steering pump can convert converted mechanical energy into hydraulic energy into the hydraulic storage element and in turn remove stored hydraulic energy from the hydraulic storage element and convert it into mechanical energy.
  • This is an emergency steering pump, which must be arranged anyway for safety reasons in the drive and represents an additional component, also included in a process of energy recovery and thus used more efficiently. The energy recovery performance can be increased by this additional component.
  • the first and / or the second hydraulic pump can be connected to the hydraulic storage element.
  • the first and / or the second hydraulic pump can also transfer mechanical energy converted into hydraulic energy into the hydraulic storage element and remove it from it and convert it into mechanical energy.
  • the emergency steering pump is designed for two opposite directions of flow.
  • the emergency steering pump can be operated at the same pivot angle or delivery volume both as a pump and as a motor.
  • the emergency steering pump is adjustable in its stroke volume.
  • the emergency steering pump is customizable to specific requirements resulting from operating conditions. For example, it is possible to regulate the volume flow, the pressure difference in pump operation or the torque during engine operation.
  • only the second hydraulic pump can be connected to the storage element by the first and the second hydraulic pump, wherein the second hydraulic pump can be connected to the storage element via a storage charge valve or a take-off valve, and the first hydraulic pump is provided for supplying the steering system.
  • the second hydraulic pump can take energy from the storage element and e.g. provide or supply as drive power of the first hydraulic pump.
  • the first hydraulic pump can be connected to the storage element via a storage charging valve and the second hydraulic pump can be connected to the storage element via a removal valve.
  • the second hydraulic pump can be taken from the first hydraulic pump in the storage element stored energy and, for example, to use to support the first hydraulic pump when feeding a working hydraulics.
  • the second hydraulic pump is designed for a flow of pressure medium in two opposite directions. This allows the second hydraulic pump to operate both as a pump and as a motor.
  • the first and second hydraulic pumps are coupled together and can be uncoupled from the transmission.
  • they can each receive energy from the respective other hydraulic pump or deliver it to the respective other hydraulic pump.
  • both hydraulic pumps can collect mechanical energy from the transmission together.
  • at least one hydraulic pump to deliver mechanical energy to the transmission.
  • the first and the second hydraulic pump are preferably each connected to a common drive shaft.
  • a common drive shaft By the common drive shaft, a stable coupling is realized, which is connectable to a transmission.
  • the emergency steering pump is preferably connected via a separate power take-off shaft fixed to the vehicle drive.
  • the separate connection allows, for example, different rotational speeds between the drive shaft and PTO shaft.
  • the size of the emergency steering pump and the gear ratio between the drive shaft and PTO shaft are each matched and adapted to other requirements.
  • volume reduction a small emergency steering pump can be selected without the realized during operation volume flows or pressures must be too low.
  • Fig. 2 shows a second embodiment of the regenerative hydrostatic drive system according to the invention.
  • Fig. 1 shows a hydrostatic system, for example a wheel loader.
  • the hydrostatic system 1 is driven by a primary drive machine, in the illustrated embodiment, a diesel engine 2.
  • the diesel engine 2 provides the necessary energy to drive a drive 3 of the vehicle.
  • the traction drive 3 is connected via a gear 5 to the diesel engine 2.
  • the diesel engine 2 drives the transmission 5 via an output shaft 7.
  • the transmission 5 is releasably connected to the output shaft 7 via a coupling 6. With the output shaft 7 are rigidly connected to a first hydraulic pump 8 and a second hydraulic pump 9. Both
  • Hydraulic pumps 8, 9 are each made adjustable in their delivery volume.
  • the second hydraulic pump 9 can be used both as a pump and as a motor.
  • the second hydraulic pump 9 can therefore be operated both in pump operation and in engine operation. These functions will be discussed below.
  • the transmission 5 has a power take-off, with which a power take-off shaft 10 is connected. With the power take-off shaft 10, an emergency steering pump 11 is connected.
  • the emergency steering pump 11 is also designed to be adjustable in its delivery volume and can also be operated both as a pump and as a motor.
  • adjusting devices 12, 13 and 14 are provided.
  • the adjusting devices 12 to 14 are controlled by a central control unit 15.
  • the pumps 8, 9 and 11 are each arranged in the open circuit and suck in the pumping operation pressure medium from a tank volume 16 at. In principle, however, the invention is also suitable for a closed system.
  • the first hydraulic pump 8 conveys the sucked pressure medium into a first delivery line 17.
  • the first delivery line 17 is connected via a priority valve 18 either to a first connecting line 19 or to the first connecting line 19 and a first
  • the priority valve 18 has a basic position and a second position. In the basic position, in which the priority valve 18 is held by a spring, the first delivery line 17 is connected to the first connecting line 19.
  • the first pump 8 then conveys pressure fluid to a steering system 37, with which it is connected via the first connecting line 19.
  • the first hydraulic pump 8 thus forms the main steering pump of the drive system, which ensures the supply of the steering system with pressure medium in normal operation.
  • the first working line 20 leads to a working hydraulics, which is designated by the reference numeral 21 in FIG. Contrary to the force of a spring acts on the priority valve 18 of the pressure prevailing in the connecting line 19 pressure. As a result, the priority valve 18 is brought into its second position only when a sufficient pressure in the steering system, ie in the first connecting line 19, is present. In the second position of the priority valve 18, the first delivery line 17 is connected only to the working line branch 20. In the second position of the priority valve 18, the first delivery line 17 with both the first
  • Work line branch 20 and connected to the first connection line 19.
  • pressure fluid delivered by the first hydraulic pump 8 is supplied both to the working hydraulics 21 and also to the steering system 37.
  • the second hydraulic pump 9, which is also connected to the output shaft 7, conveys pressure medium into a second delivery line 22.
  • the second delivery line 22 can be connected via a storage charging valve 23 either to a second working line branch 24 or to a storage charging line 25.
  • the accumulator charging valve 23 has a basic position and a working position. In the illustrated basic position of the accumulator charging valve 23, the second delivery line 22 is connected to the second working line branch 24.
  • Working line branch 24 are connected to one another and thus supply the working hydraulics 21 together.
  • the accumulator charging valve 23 is acted upon by the central control unit 15 with a control signal and can be brought against the force of a rest position spring by an electromagnet in a working position. In this working position that connects
  • the storage charging line 25 connects the accumulator charging valve 23 with a storage element 28.
  • the accumulator charge line 25 opens for this purpose in a storage line 29.
  • the memory line 29 is connected to the memory element 28.
  • the storage element 28 is designed as a hydraulic diaphragm.
  • the storage charging line 25 thus connects via the storage line 29, the accumulator charging valve 23 to the storage element 28.
  • a holding valve 30 is arranged, which has an open and a closed position. The position of the holding valve 30 is controlled by the central control unit 15 via a control signal. In its spring-loaded closed position, the holding valve 30 interrupts the storage line 29. Only in the open position, the storage line 29 is opened and it can be promoted pressure medium in the storage element 28 or removed from this.
  • the Memory element 28 and the memory charging line 25 are then connected together.
  • the storage element 28 is connected via the storage line 29 and arranged in this holding valve 30 with the
  • Storage charging line 25 connected.
  • the storage loading line 25 is also connected to the second delivery line 22 via a withdrawal line 26, bypassing the accumulator loading valve 23.
  • a removal valve 27 is arranged, which has an open and a closed position. By driving an electromagnet by means of the central control unit 15, the valve 27 can be brought from its illustrated closed position in its open position. In the open position, the storage loading line 25 is connected via the withdrawal line 26 to the second delivery line 22.
  • stored pressure medium from the storage element 28 can act on the second hydraulic pump 9 with pressure medium.
  • the then operating in the engine second hydraulic pump 9 generates a torque which is in addition to the torque of the diesel engine 2 or instead of the torque of the diesel engine 2 of the output shaft 7 is supplied.
  • the first hydraulic pump 8 can thus be driven by a second hydraulic pump 9 operating in engine operation, whereby a saving of primarily used energy from the diesel engine 2 is possible.
  • the emergency steering pump 11 is always driven when the vehicle is moving or when a traction drive shaft 3 'rotates.
  • the emergency steering pump 11 is rigidly coupled to the transmission 5 and thus to the traction drive 3.
  • the volume flow leads either into the tank volume 16 or into a third delivery line 31.
  • the third delivery line 31 is above another priority valve 32 either with a second connecting line 33, which leads into the steering system 37, or with a second memory charging line 34, which leads to the storage charging line 25 connectable.
  • the further priority valve 32 has a rest position and a memory connection position.
  • the third delivery line 31 is connected to the second connection line 33 and thus to the steering system 37.
  • the third delivery line 31 is connected to the second storage charging line 34.
  • a check valve 35 and 36 is arranged in each case.
  • the check valves 35 and 36 open in the direction of the steering hydraulics, which is designated by the reference numeral 37 and comprises at least one valve block.
  • Priority valve 32 is brought out of the rest position into its opposite storage connection position by an electromagnet.
  • the control of the electromagnet is also carried out by the central control unit 15. Due to the connectivity with the
  • Storage loading line 25 and the emergency steering pump 11 can be acted upon by pressure from the hydraulic accumulator 28.
  • Both the second hydraulic pump 9 and the emergency steering pump 11 are each independently pivotable about its zero position out in two directions, so that they can work while maintaining the direction of rotation both as a pump and as a motor.
  • the emergency steering pump 11 operates preferably in four-quadrant operation to work for both directions and thus for both directions of rotation of the power take-off shaft 10 both in the engine and in pump operation.
  • the diesel engine 2 can be operated in a fuel-optimized manner in a favorable region of its characteristic map, since, for example, freely available power can be temporarily stored in the memory element 28.
  • cached energy can be used to support the diesel engine 2 in the storage element 28, so that it can continue to be operated optimized consumption.
  • Fig. 2 shows a modified embodiment.
  • matching elements are provided with identical reference numerals. Resulting matching functions of certain elements are thus already explained in FIG. 1 and continue to apply.
  • the first hydraulic pump 8 can be connected to the working hydraulics 21 and to the steering system 37.
  • the second hydraulic pump 9 can be connected to the working hydraulics 21 and to the storage element 28.
  • the further emergency steering pump 11 can be connected to the storage element 28 and to the steering system 37.
  • Fig. 2 is the first hydraulic pump 8 is replaced by the first hydraulic pump 80, which is connectable to the working hydraulics 21 and to the storage element 28.
  • the second hydraulic pump 9 is replaced by the second hydraulic pump 90 which is connectable to the working hydraulics 21 and to the steering system 37.
  • the emergency steering pump 11 is still connectable to the storage element 28 and to the steering system 37.
  • the storage element 28 in FIG. 1 is charged by the second hydraulic pump 9 and / or by the emergency steering pump 11 and in FIG.
  • the steering system 37 in FIG. 1 is fed via the first hydraulic pump 8 and / or the emergency steering pump 11 and in FIG. 2 by the second hydraulic pump 90 and / or by the emergency steering pump 11.
  • the distribution of functions is now chosen so that the first hydraulic pump 80 is provided only for promotion and is connected via the first delivery line 17 to the accumulator charging valve 230.
  • the first delivery line 17 can be connected via the accumulator charging valve 230 either to the first working line branch 20 or to the accumulator charging line 250.
  • Storage loading valve 230 has a home position and a working position.
  • the first delivery line 17 is connected to the first working line branch 20 for supplying the working hydraulics 21.
  • the first working line branch 20 and the second working line branch 24 connect and supply the working hydraulics 21.
  • the accumulator charging valve 230 can be acted upon by the central control unit 15 with a control signal and can thus be brought against the force of a rest position spring in its working position. In this working position, the accumulator charging valve 230 connects the first delivery line 17 with the Storage charging line 250.
  • the first hydraulic pump 80 can thus promote pressure medium in the storage element 28.
  • the second hydraulic pump 90 is connected to the priority valve 180 via the second connecting line 22.
  • the second connecting line 22 can be connected via the priority valve 180 either to the first connecting line 19 or to the first connecting line 19 and the second working line branch 24.
  • the priority valve 180 has a home position and a second position. In the home position, the priority valve 180 is held by a spring.
  • the second delivery line 22 is then connected to the first connection line 19.
  • the second hydraulic pump 90 then conveys pressure fluid to the steering system 37.
  • the emergency steering pump 11 can also load the memory 28 and at a Removal of pressure fluid from the memory 28, the gearbox 5 perform an additional drive torque.
  • the emergency steering pump 11 is connected instead of the power take-off shaft 10 in the traction drive 3 with a traction drive shaft 3 '. As a result, the emergency steering pump 11 always rotates with the traction drive axle 3 '. The emergency steering pump 11 continues to take over the previously explained functions.
  • a pressure sensor 28 ' which measures the pressure in the pressure accumulator 28 and outputs it as information, is arranged on the storage element 28 or on the storage line 29.
  • the pressure sensor 28 ' is connected to the central control unit 15, which reads in information regarding the storage state of the pressure accumulator 28 and for controlling the valves 18, 180, 23, 230, 27, 32 and / or the hydraulic pumps 8, 9, 80, 90 , 11 recycled.
  • the valves 18, 180, 23, 230, 27, 32 and / or the hydraulic pumps 8, 9, 80, 90, 11 additionally information regarding the operating state of the primary drive machine is read in and utilized.
  • the valves are all electromagnetically driven.
  • priority valve 18, 180 is shown by way of example only as a differential pressure control valve.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Power Steering Mechanism (AREA)

Abstract

L'invention porte sur un système de transmission comprenant une transmission (3), une première pompe hydraulique (8, 80), une seconde pompe hydraulique (9, 90), et une pompe de secours pour direction. Une des pompes hydrauliques (8, 80, 9, 90) est destinée à l'alimentation d'un système hydraulique de travail (21), tandis qu'une autre pompe hydraulique (8, 80, 9,90) sert à alimenter un système de direction hydraulique (37). La pompe de secours pour direction (11) est couplée à la transmission (3) et sert à l'alimentation du système de direction hydraulique (37). La pompe de secours pour direction (11) peut en outre être raccordée à un élément accumulateur hydraulique (28).
PCT/EP2008/011025 2007-12-28 2008-12-22 Système de transmission hydrostatique à régénération WO2009083220A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08867526A EP2238348A1 (fr) 2007-12-28 2008-12-22 Système de transmission hydrostatique à régénération

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102007062885.6 2007-12-28
DE102007062885 2007-12-28
DE102008015729.5 2008-03-26
DE102008015729A DE102008015729A1 (de) 2007-12-28 2008-03-26 Regeneratives hydrostatisches Antriebssystem

Publications (1)

Publication Number Publication Date
WO2009083220A1 true WO2009083220A1 (fr) 2009-07-09

Family

ID=40690879

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/011025 WO2009083220A1 (fr) 2007-12-28 2008-12-22 Système de transmission hydrostatique à régénération

Country Status (3)

Country Link
EP (1) EP2238348A1 (fr)
DE (1) DE102008015729A1 (fr)
WO (1) WO2009083220A1 (fr)

Cited By (4)

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EP2251549A2 (fr) 2009-05-13 2010-11-17 Hydac Filtertechnik Gmbh Installation hydraulique
CN101954927A (zh) * 2010-10-19 2011-01-26 中国人民解放军总装备部军械技术研究所 单动力源多系统工作的多负荷传感液压系统
US9169604B2 (en) 2010-12-16 2015-10-27 Hamm Ag Self-propelled compaction roller and method for operating a self-propelled compaction roller
US20220135122A1 (en) * 2020-10-30 2022-05-05 Dana Belgium N.V. Vehicle steering system

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FR2957856B1 (fr) * 2010-03-25 2012-03-16 Peugeot Citroen Automobiles Sa Hybridation hydraulique legere et entrainement d'une prise de force sur moteur industriel
DE102011005356A1 (de) * 2011-03-10 2012-09-13 Robert Bosch Gmbh Serieller Hydraulikhybridantriebsstrang
DE102012208706A1 (de) 2012-05-24 2013-11-28 Robert Bosch Gmbh Hydraulische Maschine für ein Kraftfahrzeug
DE102012208704A1 (de) 2012-05-24 2013-11-28 Robert Bosch Gmbh Hydraulische Maschine für ein Kraftfahrzeug
DE102012208714A1 (de) 2012-05-24 2013-11-28 Robert Bosch Gmbh Hydraulische Maschine für ein Kraftfahrzeug
DE102012208687A1 (de) 2012-05-24 2013-11-28 Robert Bosch Gmbh Hydrauliksystem für ein Kraftfahrzeug
DE102012208698A1 (de) 2012-05-24 2013-11-28 Robert Bosch Gmbh Hydraulische Maschine für ein Kraftfahrzeug
DE102012208691A1 (de) 2012-05-24 2013-11-28 Robert Bosch Gmbh Hydraulische Maschine für ein Kraftfahrzeug
DE102012017004A1 (de) 2012-08-28 2014-03-06 Hydac Technology Gmbh Hydraulisches Energierückgewinnungssystem
EP2792522B1 (fr) * 2013-04-15 2017-12-27 HAWE Hydraulik SE Système d'entraînement hybride
DE102013227032A1 (de) 2013-12-20 2015-06-25 Hamm Ag Antriebssystem, insbesondere für eine selbstfahrende Baumaschine, insbesondere Bodenverdichter
WO2015200794A2 (fr) * 2014-06-26 2015-12-30 Parker-Hannifin Corporation Système de puissance hydraulique pour démarrer des véhicules
CN109649165B (zh) * 2018-12-29 2020-09-11 长沙中联重科环境产业有限公司 复合传动车辆的控制系统及方法
DE102022120356A1 (de) 2022-08-11 2024-02-22 CLAAS Tractor S.A.S Hydraulisches Lenksystem für eine landwirtschaftliche Arbeitsmaschine
DE202022106084U1 (de) 2022-10-28 2024-02-05 Mayer Verwaltungs Gmbh & Co. Kg Notlenkungsfunktion

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US4132283A (en) * 1976-08-08 1979-01-02 Mccurry Jere L System to supplement engine power
US4317499A (en) * 1979-12-26 1982-03-02 Deere & Company Vehicle emergency steering system
EP0974508A2 (fr) * 1998-07-24 2000-01-26 CLAAS Selbstfahrende Erntemaschinen GmbH Système de direction pour machines de travail automoteurs et tracteurs
WO2003011675A1 (fr) * 2001-08-03 2003-02-13 Ab Skf Systeme hydraulique de secours destine a un dispositif d'orientation par cables
US20060105875A1 (en) * 2004-11-12 2006-05-18 Eaton Corporation Hybrid powertrain system and transformer module
US20070130898A1 (en) * 2005-12-09 2007-06-14 Heinrich Dueckinghaus Hydraulic system for a self-propelled harvesting machine

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2251549A2 (fr) 2009-05-13 2010-11-17 Hydac Filtertechnik Gmbh Installation hydraulique
EP2251549A3 (fr) * 2009-05-13 2013-03-13 Hydac Filtertechnik Gmbh Installation hydraulique
CN101954927A (zh) * 2010-10-19 2011-01-26 中国人民解放军总装备部军械技术研究所 单动力源多系统工作的多负荷传感液压系统
US9169604B2 (en) 2010-12-16 2015-10-27 Hamm Ag Self-propelled compaction roller and method for operating a self-propelled compaction roller
US20220135122A1 (en) * 2020-10-30 2022-05-05 Dana Belgium N.V. Vehicle steering system
US12060120B2 (en) * 2020-10-30 2024-08-13 Dana Belgium N.V. Vehicle steering system

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EP2238348A1 (fr) 2010-10-13
DE102008015729A1 (de) 2009-07-02

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