EP2607294A1 - Machine de travail mobile dotée d'un générateur de démarrage - Google Patents

Machine de travail mobile dotée d'un générateur de démarrage Download PDF

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Publication number
EP2607294A1
EP2607294A1 EP12191743.9A EP12191743A EP2607294A1 EP 2607294 A1 EP2607294 A1 EP 2607294A1 EP 12191743 A EP12191743 A EP 12191743A EP 2607294 A1 EP2607294 A1 EP 2607294A1
Authority
EP
European Patent Office
Prior art keywords
energy storage
storage device
combustion engine
work machine
converter
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP12191743.9A
Other languages
German (de)
English (en)
Other versions
EP2607294B1 (fr
Inventor
Gerald Osper
Dr. Georg Fromme
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
STILL GmbH
Original Assignee
STILL 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 STILL GmbH filed Critical STILL GmbH
Publication of EP2607294A1 publication Critical patent/EP2607294A1/fr
Application granted granted Critical
Publication of EP2607294B1 publication Critical patent/EP2607294B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/20—Means for actuating or controlling masts, platforms, or forks
    • B66F9/24—Electrical devices or systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/07572—Propulsion arrangements

Definitions

  • the invention relates to a mobile work machine, such as an industrial truck.
  • the invention relates to a mobile work machine with internal combustion engine electric power supply, consisting of an internal combustion engine, driven by the internal combustion engine generator which feeds a DC voltage high voltage from the drives, in particular a traction drive motor and / or a drive motor of a working function of the mobile machine, wherein the intermediate circuit is connected to an electrical energy storage device, the generator can drive the internal combustion engine to start the internal combustion engine as a motor and with a low-voltage battery of a low-voltage electrical system.
  • an electric power transmission for the traction drive is known in which one of the internal combustion engine, e.g. a diesel engine, driven generator feeds an electrical DC link, from which in turn a traction drive motor is powered.
  • Industrial trucks with such a combustion engine-electric drive system can also be performed in a simple manner as a hybrid truck.
  • an energy store is provided for this purpose in a hybrid drive, which absorbs braking energy produced during the electric braking by the traction drive motors operated as generators.
  • the energy storage can be charged by the generator for future, expected power peaks of the drive.
  • the stored electrical energy is returned as needed to consumers in the truck, for example, during an acceleration phase of the traction drive.
  • the internal combustion engine can then be designed correspondingly lower in performance and consumption specifications, as well as noise and emissions regulations are easier to meet.
  • high-performance batteries for example a lithium-ion battery, or high-performance capacitors, for example double-layer capacitors known under the trade name Ultracup
  • the Generator as well as the traction motors are usually designed as AC or three-phase machines and connected via converters to the electrical DC link, which is designed in the vast majority of cases as DC voltage intermediate circuit.
  • the electrical energy storage can be connected directly to the DC voltage intermediate circuit, but is usually connected via a bidirectional DC-DC converter with this to allow voltage fluctuations in the DC voltage intermediate circuit and the energy storage can.
  • the electrical power transmission, the electrical energy storage and the traction motors are usually operated at a voltage level of several 100 V and thus at a much higher voltage level than the 12 V or 24 V, as commercially available and known for vehicle electrical systems and the ancillaries of internal combustion engines , Since the internal combustion engines, together with their ancillary components as well as the electrical components of the electrical system correspond to the standards for motor vehicles, thus exist two completely separate electrical networks.
  • This prior art is used for start-stop systems and is useful in these, since the generator can be better designed for continuous operation and can have a high drive power during startup.
  • a disadvantage of this prior art is that, especially when using high performance capacitors as energy storage, the starting ability of the internal combustion engine is not always guaranteed when the energy storage is completely discharged. Also, the capacity of an energy storage device, which is made up of high-performance capacitors, as a rule, compared to a high-performance battery significantly lower because an energy storage of high-performance capacitors is designed mainly only for the absorption of braking energy. If then several state tests are required, it can happen that the stored energy to start the engine is no longer sufficient. Also, there is always the possibility that the energy storage is not sufficiently charged at the time of switching off the internal combustion engine and thus lacks the energy to restart the internal combustion engine. This also applies to a high-performance battery as energy storage, which has a higher capacity.
  • the present invention is therefore an object of the invention to provide a mobile machine with internal combustion engine electric power supply, in particular for a traction drive and / or working drives available, in which the aforementioned disadvantages are avoided and is inexpensive and compact in its construction.
  • the object is achieved in that in a mobile machine, in particular a truck, with internal combustion engine electric power supply, consisting of an internal combustion engine, driven by the internal combustion engine generator which feeds a DC voltage high voltage from the drives, in particular a traction motor and / or a drive motor of a working function of the working machine is fed, the intermediate circuit is connected to an electrical energy storage device and the generator can drive the internal combustion engine to start the internal combustion engine as a motor acting.
  • a low-voltage battery of a low-voltage electrical system is connected to the energy storage device or the intermediate circuit via a DC-DC converter, and the energy storage device can be charged from the low-voltage battery. This can be advantageously ensured that at any time starting the engine is possible.
  • the energy storage device can be charged to the extent before the start of the internal combustion engine via the DC-DC converter, or the charge state are always kept at a minimum level that starting the engine is possible via the generator operated as a motor. This is particularly advantageous in a start-stop operation, which can save fuel due to the elimination of unnecessary idling operation.
  • the motor-driven generator can meet fatigue requirements more easily than a conventional starter in a low voltage electrical system and, because of the potential higher power, can start the engine more reliably and faster. A quick start of the internal combustion engine avoids unpleasant delays during start-up operation.
  • an external charger as it is commercially available and readily available for motor vehicle electrical systems with 12 V or 24 V, to indirectly charge the energy storage.
  • the missing amount of energy can then be supplied via a mains-powered charger.
  • the internal combustion engine has no starter powered by the low-voltage onboard power supply.
  • the energy storage device or the intermediate circuit can be connected to the low-voltage battery via a second DC-DC converter, and the low-voltage battery can be charged from the intermediate circuit or the energy storage device.
  • the DC-DC converter is a bidirectional DC-DC converter and can be loaded from the energy storage device or the DC link, the low-voltage battery.
  • the bidirectional DC-DC converter consist of two DC-DC converters in a common housing or two separate DC-DC converters, which are connected in parallel in opposite directions.
  • the low-voltage electrical system has no generator.
  • the cost of the generator can be saved as an accessory of the engine in terms of cost and installation space.
  • the energy storage device is connected via a DC link DC converter with the DC link.
  • the intermediate circuit does not have to be maintained at a constant voltage suitable for the energy storage device.
  • double-layer capacitors as energy storage of the DC link DC voltage converter of particular advantage or Required, since the voltage varies greatly depending on the charge state.
  • the DC link DC voltage converter may be a bidirectional DC-DC converter.
  • the energy storage device can then advantageously absorb energy from the intermediate circuit, in particular in the context of a hybrid drive, for example, recovered energy from the electric brakes with electric traction motors.
  • electrical energy can be supplied via the intermediate circuit for a brief increase in the power from the low-voltage battery.
  • the low-voltage battery feed additional energy into the DC link and there is the possibility of a boost operation. This can be done indirectly via the energy storage device or directly into the DC link.
  • the charging of the energy storage device can be done with the internal combustion engine for service purposes.
  • the DC-DC converter and / or further DC-DC converter can be controlled by a power control computer via a bus system, in particular a CAN bus.
  • the energy storage device can be constructed from high-performance capacitors, in particular double-layer capacitors.
  • the energy storage device may consist of a high-performance battery, in particular a lithium-ion battery.
  • FIG. 1 is an internal combustion engine-electrically powered truck 1 in the form of a counterbalance forklift shown as an example of a mobile machine 2 in supervision with the main units of the drive.
  • the truck 1 has a vehicle frame 3, which is provided in the load-facing area with two drive wheels 4 and in the load-remote area with steered wheels 5.
  • a mast 6 is arranged, on which a load fork 7 designed as a load-receiving means 8 is arranged movable up and down.
  • the truck 1 is provided with a counterweight 9.
  • the truck 1 is provided with an internal combustion engine-electric drive system comprising an electric traction drive unit.
  • the traction drive unit has a power supply unit that is powered by an internal combustion engine 10, e.g. a diesel engine, and a synchronous generator 11 connected and driven with the engine 10.
  • the electrical energy generated by the synchronous generator 11 is supplied via a rectifier 12 and a DC voltage intermediate circuit 13 to a converter 14, by means of which at least one arranged in or on a drive axle 15 electric traction drive motor 16, for example, an asynchronous three-phase motor, is supplied with electrical energy.
  • the traction drive motor 16 is connected with the interposition of a differential gear 17 and two reduction gear 18 with the drive wheels 4 in combination.
  • a dual-motor axle can also be provided, in each of which a traction drive motor with the interposition of a reduction gear is in communication with the corresponding drive wheel 4.
  • the internal combustion engine 10, the generator 11 and the intermediate circuit 13 and the drive axle 15 are in this case arranged together with other components, not shown, in a unit space 19 of the truck 1.
  • the internal combustion engine 10 is provided with a liquid cooling.
  • the liquid cooling has a heat exchanger 20 which is arranged, for example, in the region of the counterweight 9 and which is connected to the internal combustion engine 10 by cooling circuits 21.
  • the heat exchanger 20 is traversed by means of a cooling fan 22 of air to increase the deliverable from the cooling liquid to the ambient heat amount of heat.
  • an electrical energy storage device 23 Connected to the intermediate circuit 13 is an electrical energy storage device 23.
  • the Fig. 2 schematically shows the structure of the drive system of the truck 1 from the Fig. 1 ,
  • the internal combustion engine 10 drives the generator 11 designed as a synchronous generator, and the three-phase current generated by the generator 11 is rectified in the generator converter 12 and supplied to the converter 14 via the intermediate circuit 13.
  • the generator converter 12 can also be operated as a converter and thereby allows operation of the generator 11 as a motor.
  • the inverter 14 forms from the DC voltage of the intermediate circuit 13 three-phase three-phase variable frequency, with which the traction drive motor 16 is fed, which drives the drive wheels 4 via the differential gear 17.
  • An intermediate circuit capacitor 24 is used for energetic coupling, at the same time with a bidirectional DC link DC voltage converter 25 forms, via which the constructed of high-power capacitors 26 electrical energy storage device 23 is connected to the DC-link 13.
  • the DC link DC voltage converter 25, the electrical energy storage device 23, the generator 12 and the converter 14 and the intermediate circuit 13 form a drive electronics 27 for the driver's drive of the truck 1.
  • a DC-DC converter 28 the electrical energy storage device 23 is connected to a low-voltage battery 29 so that from the Low-voltage battery 29, the energy storage device 23 can be loaded.
  • An energy control computer 30 is connected via a bus system 31, here in the form of a CAN bus 32, to a motor controller 33 and the DC link DC converter 25 and the DC converter 28.
  • the low-voltage battery 29 is part of a low-voltage electrical system 34 and corresponds to a conventional starter battery of an automotive engine.
  • the energy control computer 30, In start-stop mode, the energy control computer 30, depending on the operating situation and an expected shutdown of the internal combustion engine 10, ensures that the energy storage device 23 is sufficiently charged to start the internal combustion engine 10 via the generator 11 operated as a motor.
  • the DC-DC converter 28 is controlled by the energy control computer 30 so that the energy storage device 23 is charged from the low-voltage battery 29.
  • a separate starter for the internal combustion engine 10 can be omitted.
  • the DC-DC converter 28 is designed as a bidirectional DC-DC converter, so that via the energy storage device 23 electrical energy from the DC link 13 can be used to recharge the low-voltage battery 29 and feed consumers of the low-voltage electrical system 34, for example, the lighting of the mobile machine 2. This can also a generator can be saved as an accessory of the internal combustion engine 10.
  • the Fig. 3 shows a schematic representation of another alternative example of an internal combustion engine electric drive train of the drive system of the truck 1 from the Fig. 1 , With the Fig. 2 identical components are provided with the same reference numerals.
  • the generator 11 driven by the internal combustion engine 10 feeds the intermediate circuit 13 via the generator converter 12.
  • the generator converter 12 also makes it possible to operate the generator 11 as a motor.
  • the inverter 14 feeds the traction drive motor 16, which drives the drive wheels 4 via the differential gear 17.
  • the DC link capacitor 24 is used for energetic coupling, at the same time with the bidirectional DC link DC converter 25, via which the constructed of high-power capacitors 26 electrical energy storage device 23 is connected to the DC-link 13.
  • the DC link DC voltage converter 25, the electrical energy storage device 23, the generator converter 12 and the inverter 14 and the intermediate circuit 13 form the drive electronics 27 for the driver drive of the truck 1.
  • the intermediate circuit 13 is connected to the low-voltage battery 29, so that from the low-voltage battery 29 via the intermediate circuit 13 and the DC link DC converter 25, the energy storage device 23 can be charged. If the low-voltage vehicle electrical system is fed via the DC-DC converter 28, which is bidirectional, the DC-DC converter 25 is not loaded in this alternative embodiment.
  • the rest of the structure of the drive system is equal to that of the embodiment of Fig. 2 ,

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
EP12191743.9A 2011-12-21 2012-11-08 Machine de travail mobile dotée d'un générateur de démarrage Not-in-force EP2607294B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011056751A DE102011056751A1 (de) 2011-12-21 2011-12-21 Mobile Arbeitsmaschine mit Startgenerator

Publications (2)

Publication Number Publication Date
EP2607294A1 true EP2607294A1 (fr) 2013-06-26
EP2607294B1 EP2607294B1 (fr) 2014-01-29

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EP12191743.9A Not-in-force EP2607294B1 (fr) 2011-12-21 2012-11-08 Machine de travail mobile dotée d'un générateur de démarrage

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EP (1) EP2607294B1 (fr)
DE (1) DE102011056751A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107848425A (zh) * 2015-08-10 2018-03-27 三菱电机株式会社 铁路车辆用控制装置
DE102019120143A1 (de) * 2019-07-25 2021-01-28 Bayerische Motoren Werke Aktiengesellschaft Verfahren zum Betreiben einer Antriebsvorrichtung für ein Kraftfahrzeug, Antriebsvorrichtung sowie Kraftfahrzeug
WO2024068113A1 (fr) * 2022-09-27 2024-04-04 Robert Bosch Gmbh Dispositif convertisseur cc-cc, système d'alimentation électrique et procédé de décharge d'un condensateur de liaison cc

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113526413B (zh) * 2021-07-20 2022-10-25 宁波如意股份有限公司 一种叉车举升装置及其发电效率控制方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1736433A1 (fr) * 2004-04-13 2006-12-27 Kabushiki Kaisha Toyota Jidoshokki Dispositif de manipulation de chargement pour véhicule industriel de manipulation de chargement
EP1974979A2 (fr) 2007-03-27 2008-10-01 Still Gmbh Chariot de manutention doté d'un entraînement hybride
EP2308795A1 (fr) * 2009-10-09 2011-04-13 Linde Material Handling GmbH Dispositif hydraulique et procédé de fonctionnement dans une machine de travail mobile

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011012724A1 (de) 2011-02-17 2012-08-23 Still Gmbh Leistungselektronik für eine mobile Arbeitsmaschine, insbesondere Flurförderung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1736433A1 (fr) * 2004-04-13 2006-12-27 Kabushiki Kaisha Toyota Jidoshokki Dispositif de manipulation de chargement pour véhicule industriel de manipulation de chargement
EP1974979A2 (fr) 2007-03-27 2008-10-01 Still Gmbh Chariot de manutention doté d'un entraînement hybride
EP2308795A1 (fr) * 2009-10-09 2011-04-13 Linde Material Handling GmbH Dispositif hydraulique et procédé de fonctionnement dans une machine de travail mobile

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107848425A (zh) * 2015-08-10 2018-03-27 三菱电机株式会社 铁路车辆用控制装置
CN107848425B (zh) * 2015-08-10 2020-08-25 三菱电机株式会社 铁路车辆用控制装置
DE102019120143A1 (de) * 2019-07-25 2021-01-28 Bayerische Motoren Werke Aktiengesellschaft Verfahren zum Betreiben einer Antriebsvorrichtung für ein Kraftfahrzeug, Antriebsvorrichtung sowie Kraftfahrzeug
WO2024068113A1 (fr) * 2022-09-27 2024-04-04 Robert Bosch Gmbh Dispositif convertisseur cc-cc, système d'alimentation électrique et procédé de décharge d'un condensateur de liaison cc

Also Published As

Publication number Publication date
DE102011056751A1 (de) 2013-06-27
EP2607294B1 (fr) 2014-01-29

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