DE102011076815A1 - Method for controlling or regulating electric traction drive of industrial truck, involves controlling traction current of traction drive for generating torque for accelerating or delaying industrial truck depending on loading state - Google Patents
Method for controlling or regulating electric traction drive of industrial truck, involves controlling traction current of traction drive for generating torque for accelerating or delaying industrial truck depending on loading state Download PDFInfo
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- DE102011076815A1 DE102011076815A1 DE102011076815A DE102011076815A DE102011076815A1 DE 102011076815 A1 DE102011076815 A1 DE 102011076815A1 DE 102011076815 A DE102011076815 A DE 102011076815A DE 102011076815 A DE102011076815 A DE 102011076815A DE 102011076815 A1 DE102011076815 A1 DE 102011076815A1
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000001276 controlling effect Effects 0.000 title claims description 4
- 230000001105 regulatory effect Effects 0.000 title claims description 3
- 230000001133 acceleration Effects 0.000 description 8
- 230000001419 dependent effect Effects 0.000 description 3
- 238000009987 spinning Methods 0.000 description 2
- BUHVIAUBTBOHAG-FOYDDCNASA-N (2r,3r,4s,5r)-2-[6-[[2-(3,5-dimethoxyphenyl)-2-(2-methylphenyl)ethyl]amino]purin-9-yl]-5-(hydroxymethyl)oxolane-3,4-diol Chemical compound COC1=CC(OC)=CC(C(CNC=2C=3N=CN(C=3N=CN=2)[C@H]2[C@@H]([C@H](O)[C@@H](CO)O2)O)C=2C(=CC=CC=2)C)=C1 BUHVIAUBTBOHAG-FOYDDCNASA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
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Classifications
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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
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/10—Indicating wheel slip ; Correction of wheel slip
- B60L3/102—Indicating wheel slip ; Correction of wheel slip of individual wheels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2200/00—Type of vehicles
- B60L2200/40—Working vehicles
- B60L2200/42—Fork lift trucks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/42—Drive Train control parameters related to electric machines
- B60L2240/423—Torque
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/42—Drive Train control parameters related to electric machines
- B60L2240/429—Current
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/46—Drive Train control parameters related to wheels
- B60L2240/465—Slip
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/60—Electric or hybrid propulsion means for production processes
-
- 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
- Y02T10/64—Electric machine technologies in electromobility
-
- 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
- Y02T10/72—Electric energy management in electromobility
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Civil Engineering (AREA)
- Sustainable Development (AREA)
- Geology (AREA)
- Forklifts And Lifting Vehicles (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
Description
Die vorliegende Erfindung betrifft ein Flurförderzeug und ein Verfahren zum Steuern und/oder Regeln eines elektrischen Fahrantriebes eines Flurförderzeuges gemäß der im Oberbegriff des Patentanspruches 1 bzw. 7 näher definierten Art. The present invention relates to a truck and a method for controlling and / or regulating an electric traction drive of a truck according to the closer defined in the preamble of
Beispielsweise in der noch nicht veröffentlichten Anmeldung
Bei elektrisch angetriebenen Flurförderzeugen gibt der Fahrer des Fahrzeuges einer zentralen Steuerung mithilfe des Fahrpedals ein Eingangssignal zum Ansteuern des Fahrantriebes. Dieses Eingangssignal verarbeitet die Steuerung und stellt einen entsprechenden Fahrstrom für den einen Antriebsmotor umfassenden Fahrantrieb bereit. Das von den Antriebsmotoren bzw. von dem Fahrantrieb erzeugte Antriebsmoment nimmt mit dem von der Steuerung bereitgestellten Fahrstrom zu. Das maximale Drehmoment, das vom Laufrad bzw. Antriebsrad auf den Boden übertragen werden kann, ist jedoch von der Radlast und dem Reibwert zwischen Antriebsrad und Boden abhängig. Wenn das erzeugte Antriebs- oder Verzögerungsmoment, welches von dem Fahrantrieb bereitgestellt wird, größer als das zwischen dem Antriebsrad und dem Boden übertragbare Moment ist, entsteht ein Schlupf zwischen dem Antriebsrad und dem Boden, welcher zu kritischen Fahrzuständen führen kann. Zudem erhöht sich der Verschleiß an den Antriebsrädern, welches kostenintensiv ist. In electrically driven industrial trucks, the driver of the vehicle gives a central control by means of the accelerator pedal an input signal for driving the traction drive. This input signal is processed by the controller and provides a corresponding traction current for the traction drive comprising a drive motor. The drive torque generated by the drive motors or by the traction drive increases with the traction current provided by the control. However, the maximum torque which can be transmitted to the ground by the impeller or drive wheel is dependent on the wheel load and the coefficient of friction between the drive wheel and the ground. If the generated drive or deceleration torque provided by the traction drive is greater than the torque transmittable between the drive wheel and the ground, a slip occurs between the drive wheel and the ground, which can lead to critical driving conditions. In addition, the wear on the drive wheels increases, which is costly.
Demnach liegt der vorliegenden Erfindung die Aufgabe zu Grunde, ein Flurförderzeug und ein Verfahren zum Ansteuern eines Fahrantriebes eines Flurförderzeuges der eingangs beschriebenen Gattung vorzuschlagen, bei denen die Ansteuerung des Flurförderzeuges derart verbessert wird, dass kein Schlupf an den Antriebsrädern aufgrund des erzeugten Drehmomentes zum Beschleunigen oder Verzögern bei dem Flurförderzeug auftritt. Accordingly, the present invention, the object of an industrial truck and a method for driving a traction drive of a truck of the type described above propose, in which the control of the truck is improved so that no slip on the drive wheels due to the torque generated for accelerating or Deceleration occurs on the truck.
Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Patentanspruches 1 bzw. 7 gelöst. Weitere vorteilhafte Ausgestaltungen ergeben sich insbesondere aus den jeweiligen Unteransprüchen sowie den Zeichnungen und der dazugehörigen Beschreibung. This object is achieved by the features of
Die der Erfindung zu Grunde liegende Aufgabe wird zum einen verfahrensmäßig dadurch gelöst, dass der Fahrstrom bzw. Antriebsstrom der Leistungselektronik für den zum Beispiel mehrere Elektromotoren umfassenden Fahrantrieb zum Erzeugen eines entsprechenden Beschleunigungs- oder Verzögerungsmomentes des Flurförderzeuges in Abhängigkeit des jeweiligen Beladungszustandes entsprechend angesteuert wird. Gegenständlich wird die der Erfindung zu Grunde liegende Aufgabe dadurch gelöst, dass zum Erfassen des jeweiligen Beladungszustandes bzw. der Nutzlast des Flurförderzeuges ein Signalumwandler oder dergleichen vorgesehen ist, der der zentralen Steuerung zum Ansteuern des Fahrstromes ein Beladungssignal bereitstellt. The object of the invention is on the one hand achieved procedurally in that the traction current or drive current of the power electronics for the drive motor comprising, for example, a plurality of electric motors for generating a corresponding acceleration or deceleration torque of the truck depending on the respective load condition is controlled accordingly. Objectively, the object underlying the invention is achieved in that for detecting the respective load condition or the payload of the truck, a signal converter or the like is provided which provides the central control for driving the traction current, a load signal.
Insbesondere bei Flurförderzeugen, wie zum Beispiel Gabelstaplern oder dergleichen ergeben sich beladungsabhängig erheblich schwankende Radlasten an den Antriebsrädern. Dadurch verändert sich auch das auf das Antriebsrad maximal möglich wirkende Antriebsmoment, welche auf den Boden ohne Schlupf übertragen werden kann. Darüber hinaus kann das Flurförderzeug frontgetrieben oder heckgetrieben ausgeführt sein und ferner können durch den Fahrantrieb Antriebsachsen oder Einzelradantriebe realisiert werden. Beispielsweise bei einem frontgetriebenen Gabelstapler als Flurförderzeug ist die Gesamtmasse und damit die Radlast an den vorderen Antriebsrädern besonders hoch, während die nicht angetriebenen, hinteren Räder weniger belastet sind. Bei einem derartigen Lastzustand wird zum Beschleunigen oder Verzögern des Fahrzeuges ein besonders hohes Antriebsmoments und damit auch ein entsprechend hoher Fahrstrom bereitgestellt, da das an den Antriebsrädern zu übertragene Drehmoment aufgrund der Lastverteilung besonders hoch ist. Beispielsweise bei einem unbeladenen Gabelstapler als Flurförderzeug ist die Achslast der angetriebenen Frontachse sehr viel geringer als im beladenen Zustand, so dass das erfindungsgemäße Verfahren dies in der Weise berücksichtigt, dass die Steuerung den zur Verfügung gestellten Fahrstrom entsprechend der geringeren Radlast an den Antriebsrädern reduziert, um dadurch ein Durchdrehen bzw. Durchrutschen der Antriebsräder zu verhindern. In particular, in industrial trucks, such as forklifts or the like arise depending on the load significantly fluctuating wheel loads on the drive wheels. This also changes the maximum possible driving torque on the drive wheel, which can be transmitted to the ground without slippage. In addition, the truck can be front-wheel drive or rear-wheel drive executed and also can be realized by the drive drive axles or single wheel drives. For example, in a front-wheel drive lift truck as the truck, the total mass and thus the wheel load on the front drive wheels is particularly high, while the non-driven rear wheels are less stressed. In such a load state, a particularly high drive torque and thus also a correspondingly high traction current is provided for accelerating or decelerating the vehicle, since the torque to be transmitted to the drive wheels is particularly high due to the load distribution. For example, in an unloaded forklift truck as the truck, the axle load of the driven front axle is much lower than in the loaded state, so that the inventive method takes this into account in such a way that the control reduces the provided traction current corresponding to the lower wheel load on the drive wheels to thereby preventing a spinning or slipping of the drive wheels.
Beispielsweise bei heckgetriebenen Flurförderzeugen, insbesondere Gabelstaplern, ergibt sich im Gegensatz zu frontgetriebenen Gabelstaplern ein umgekehrtes Lastverhalten, so dass durch die Aufnahme einer Nutzlast die heckgetriebenen Antriebsräder entlastet werden, so dass das maximal übertragbare Drehmoment an den Antriebsrädern im unbeladenen Zustand des Flurförderzeuges am höchsten ist. Demzufolge wird im Rahmen der Erfindung vorgesehen, dass die Steuerung den Fahrstrom im beladenen Zustand des Flurförderzeuges entsprechend reduziert, so dass auch bei heckgetriebenen Flurförderzeugen ein Durchdrehen bzw. Durchrutschen der heckseitigen Antriebsräder verhindert wird. For example, in rear-wheeled trucks, especially forklifts, results in contrast to front-wheel drive forklifts a reverse load behavior, so that the inclusion of a payload rear-driven drive wheels are relieved, so that the maximum transmittable torque to the drive wheels in the unloaded condition of the truck is highest. Accordingly, it is provided in the context of the invention that the control reduces the traction current in the loaded state of the truck accordingly, so that even with rear-wheeled trucks spinning or slipping of the rear-side drive wheels is prevented.
Im Rahmen des erfindungsgemäßen Verfahrens wird diese erfindungsgemäße Vorgehensweise durch die entsprechende Begrenzung des bereitgestellten Fahrstromes in Abhängigkeit der jeweils ermittelten Nutzlast gelöst, so dass ein Schlupf an jedem Antriebsrad bzw. an jeder Antriebsachse verhindert wird. In the context of the method according to the invention, this approach according to the invention is achieved by the corresponding limitation of the provided traction current as a function of the respectively determined payload, so that slippage on each drive wheel or on each drive axle is prevented.
Das ebenfalls vorgeschlagene Flurförderzeug ermöglicht die vorbeschriebene erfindungsgemäße Vorgehensweise dadurch, dass die zentrale Steuerung des Flurförderzeuges mit zumindest einem Signalumwandler zum Erfassen des Beladungszustandes gekoppelt ist. Durch das Vorsehen des Signalumwandlers, der zum Beispiel als Drucksensor oder dergleichen ausgeführt sein kann, wird der zentralen Steuerung ermöglicht, einen durch die jeweilige Nutzlast an dem Flurförderzeug bzw. an dem Gabelstapler erzeugten hydraulischen Druck als entsprechendes Eingangssignal zu erfassen, welches den Beladungszustand des Flurförderzeuges charakterisiert. Auf diese Weise kann bei einem derart gestalteten Flurförderzeug ein Schlupf an jedem Antriebsrad verhindert werden. The truck also proposed allows the above-described approach of the invention in that the central control of the truck is coupled to at least one signal converter for detecting the loading condition. By providing the signal converter, which may for example be designed as a pressure sensor or the like, the central control is enabled to detect a generated by the respective payload on the truck or on the forklift hydraulic pressure as a corresponding input signal, which is the load condition of the truck characterized. In this way, a slip on each drive wheel can be prevented in such a designed truck.
Nachfolgend wird die vorliegende Erfindung anhand der Zeichnungen weiter erläutert. Es zeigen: Hereinafter, the present invention will be further explained with reference to the drawings. Show it:
In den Figuren sind beispielhaft zwei mögliche Ausführungsvarianten eines erfindungsgemäßen Flurförderzeuges dargestellt. Unabhängig von den jeweiligen Ausführungsvarianten ist das Flurförderzeug als Gabelstapler
Beispielsweise kann die auf den Gabeln des Gabelstaplers
Bei dem in
Bei der in
Unabhängig von den jeweiligen Ausführungsvarianten kann zur Bestimmung des Beladungszustandes der durch die vorhandene Nutzlast
BezugszeichenlisteLIST OF REFERENCE NUMBERS
- 1, 1A1, 1A
- Gabelstapler fork-lift truck
- 2 2
- elektrischer Fahrantrieb electric traction drive
- 3 3
- zentrale Steuerung central control
- 4 4
- Fahrpedal accelerator
- 5 5
- Nutzlast payload
- 6 6
- Hubzylinder lifting cylinder
- 7 7
- Signalumwandler signal converter
- 8 8th
- Antriebsrad drive wheel
- 9 9
- Boden ground
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- DE 102011004813 [0002] DE 102011004813 [0002]
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102011076815A DE102011076815A1 (en) | 2011-05-31 | 2011-05-31 | Method for controlling or regulating electric traction drive of industrial truck, involves controlling traction current of traction drive for generating torque for accelerating or delaying industrial truck depending on loading state |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102011076815A DE102011076815A1 (en) | 2011-05-31 | 2011-05-31 | Method for controlling or regulating electric traction drive of industrial truck, involves controlling traction current of traction drive for generating torque for accelerating or delaying industrial truck depending on loading state |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE102011076815A1 true DE102011076815A1 (en) | 2012-12-06 |
Family
ID=47173185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE102011076815A Withdrawn DE102011076815A1 (en) | 2011-05-31 | 2011-05-31 | Method for controlling or regulating electric traction drive of industrial truck, involves controlling traction current of traction drive for generating torque for accelerating or delaying industrial truck depending on loading state |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE102011076815A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2982944A1 (en) | 2014-08-06 | 2016-02-10 | Jungheinrich Aktiengesellschaft | Vehicle wheel speed based monitoring and/or estimation of a load weight of an industrial vehicle load |
| DE102016219482A1 (en) | 2016-10-07 | 2018-04-12 | Zf Friedrichshafen Ag | Drive control unit and method for limiting a maximum speed of an industrial truck |
| CN116577112A (en) * | 2023-03-13 | 2023-08-11 | 永恒力叉车制造(上海)有限公司 | Power performance detection method for forklift |
| CN116605189A (en) * | 2023-04-18 | 2023-08-18 | 安徽合力股份有限公司 | Vehicle braking control method and device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3203553A1 (en) * | 1981-02-04 | 1982-10-28 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho, Kariya, Aichi | METHOD AND DEVICE FOR DISPLAYING THE CHARGING STATE FOR A FORKLIFT |
| DE3607135A1 (en) * | 1986-03-05 | 1987-09-10 | Feldmuehle Ag | METHOD FOR SIGNALING THE LOAD AND OVERLOAD |
| DE4133060A1 (en) * | 1991-10-04 | 1993-04-08 | Mannesmann Ag | DRIVE ARRANGEMENT FOR A MOTOR VEHICLE |
| DE102009058328A1 (en) * | 2008-12-15 | 2010-07-22 | Hitachi Construction Machinery Co., Ltd. | Electric vehicle with pitch control device |
| DE102010020124A1 (en) * | 2010-05-10 | 2011-11-10 | Sew-Eurodrive Gmbh & Co. Kg | Vehicle i.e. rail-bounded vehicle operating method, involves considering reference value for acceleration and spacing between wheels, and controlling torque based on controlling torque distribution between wheels |
| DE102011004813A1 (en) | 2011-02-28 | 2012-08-30 | Zf Friedrichshafen Ag | Brake actuation unit for continuously adjusting braking force of e.g. load-sensitive parking brake for forklift, has piston exerting additional braking force on anchor plate in or opposite to braking force direction for adjusting force |
-
2011
- 2011-05-31 DE DE102011076815A patent/DE102011076815A1/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3203553A1 (en) * | 1981-02-04 | 1982-10-28 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho, Kariya, Aichi | METHOD AND DEVICE FOR DISPLAYING THE CHARGING STATE FOR A FORKLIFT |
| DE3607135A1 (en) * | 1986-03-05 | 1987-09-10 | Feldmuehle Ag | METHOD FOR SIGNALING THE LOAD AND OVERLOAD |
| DE4133060A1 (en) * | 1991-10-04 | 1993-04-08 | Mannesmann Ag | DRIVE ARRANGEMENT FOR A MOTOR VEHICLE |
| DE102009058328A1 (en) * | 2008-12-15 | 2010-07-22 | Hitachi Construction Machinery Co., Ltd. | Electric vehicle with pitch control device |
| DE102010020124A1 (en) * | 2010-05-10 | 2011-11-10 | Sew-Eurodrive Gmbh & Co. Kg | Vehicle i.e. rail-bounded vehicle operating method, involves considering reference value for acceleration and spacing between wheels, and controlling torque based on controlling torque distribution between wheels |
| DE102011004813A1 (en) | 2011-02-28 | 2012-08-30 | Zf Friedrichshafen Ag | Brake actuation unit for continuously adjusting braking force of e.g. load-sensitive parking brake for forklift, has piston exerting additional braking force on anchor plate in or opposite to braking force direction for adjusting force |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2982944A1 (en) | 2014-08-06 | 2016-02-10 | Jungheinrich Aktiengesellschaft | Vehicle wheel speed based monitoring and/or estimation of a load weight of an industrial vehicle load |
| DE102014215509A1 (en) | 2014-08-06 | 2016-02-11 | Jungheinrich Aktiengesellschaft | Vehicle wheel speed based determination or estimation of a load weight of a load picked up by a commercial vehicle |
| US9658099B2 (en) | 2014-08-06 | 2017-05-23 | Jungheinrich Aktiengesellschaft | Vehicle wheel speed-based determination or estimation of a load weight of a load carried by a commercial vehicle |
| DE102016219482A1 (en) | 2016-10-07 | 2018-04-12 | Zf Friedrichshafen Ag | Drive control unit and method for limiting a maximum speed of an industrial truck |
| CN116577112A (en) * | 2023-03-13 | 2023-08-11 | 永恒力叉车制造(上海)有限公司 | Power performance detection method for forklift |
| CN116605189A (en) * | 2023-04-18 | 2023-08-18 | 安徽合力股份有限公司 | Vehicle braking control method and device |
| CN116605189B (en) * | 2023-04-18 | 2025-12-23 | 安徽合力股份有限公司 | Vehicle braking control method and device |
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