EP2189581A1 - Véhicule doté d'un dispositif de charge - Google Patents

Véhicule doté d'un dispositif de charge Download PDF

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Publication number
EP2189581A1
EP2189581A1 EP09176120A EP09176120A EP2189581A1 EP 2189581 A1 EP2189581 A1 EP 2189581A1 EP 09176120 A EP09176120 A EP 09176120A EP 09176120 A EP09176120 A EP 09176120A EP 2189581 A1 EP2189581 A1 EP 2189581A1
Authority
EP
European Patent Office
Prior art keywords
suspension
control unit
vehicle
hydraulic
vehicle speed
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.)
Withdrawn
Application number
EP09176120A
Other languages
German (de)
English (en)
Inventor
Sébastien Portet
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.)
Deere and Co
Original Assignee
Deere and Co
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 Deere and Co filed Critical Deere and Co
Publication of EP2189581A1 publication Critical patent/EP2189581A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2203—Arrangements for controlling the attitude of actuators, e.g. speed, floating function
    • E02F9/2207—Arrangements for controlling the attitude of actuators, e.g. speed, floating function for reducing or compensating oscillations
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2217—Hydraulic or pneumatic drives with energy recovery arrangements, e.g. using accumulators, flywheels
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2253—Controlling the travelling speed of vehicles, e.g. adjusting travelling speed according to implement loads, control of hydrostatic transmission

Definitions

  • the invention relates to a vehicle with a loading device, wherein the loading device comprises a loader rocker and further comprises a hydraulic system for raising and lowering the loader arm with hydraulic suspension for suspension of the loader rocker and a control unit for controlling the suspension is provided.
  • suspensions for loader devices on vehicles, especially for front-end loaders on agricultural tractors, are well known and are offered as a convenience and productivity enhancing feature by many manufacturers.
  • Such suspensions are generally designed hydraulically and are based on an interaction between one or more hydraulic accumulators and the hydraulic cylinder actuating the charger device.
  • the suspensions are further designed such that they can be switched on or off via a switching valve, with a connection and disconnection usually done manually and is performed individually by the driver depending on the requirements of the application.
  • an activation switch may be provided in the cabin of the vehicle, with which a corresponding switching valve is controlled, which in turn blocks or releases the hydraulic accumulator or memory, wherein the switching valve is usually designed as an electromagnetic switching valve.
  • the object underlying the invention is seen to provide a vehicle of the type mentioned, by which the aforementioned problems are overcome.
  • a vehicle of the type mentioned in the introduction has a control unit which is embodied such that the suspension of the charging device can be activated as a function of a control variable representing a vehicle speed.
  • the suspension is automatically activated or deactivated, for example, when the vehicle is stationary or when a predefinable threshold value for a vehicle speed is reached, without the driver having to operate a switch for actuating the suspension.
  • the size representing the vehicle speed can be generated for example by a speed or speed sensor and given to the control unit.
  • the variable representing the vehicle speed may also be derived from any quantity physically related to the vehicle speed and given to the control unit.
  • an electronic bus system for example a CANBUS system, can also be provided, which automatically supplies the required control variables to the vehicle speed to the control unit.
  • the control unit then generates a corresponding control signal, which is used to control a switching valve activating (or deactivating) the suspension.
  • control unit is designed such that the suspension is switched on when exceeding a predetermined threshold of the vehicle speed for the vehicle speed.
  • the control unit upon reaching a control value representing the threshold value for the driving speed, the control unit generates a control signal which activates the suspension or which activates the control valve activating the suspension in such a way that the suspension is activated for the charging device.
  • control unit is designed such that the suspension is switched off when falling below a threshold of the vehicle speed predeterminable for the vehicle speed.
  • a control signal is generated by the control unit upon reaching a threshold value for the vehicle speed, which switches off the suspension or which controls the suspension activating the control valve such that the suspension is deactivated for the charger device.
  • an input device is provided on the vehicle, with which the control unit, the threshold value for the vehicle speed can be predetermined.
  • the driver can thus enter or specify the threshold speed via the input device, in which the control unit is to trigger or generate the corresponding control signal for actuating the suspension.
  • an operating mode for activation or Deactivation of the suspension selectable, so that a manual control of the suspension is enabled via an activation switch for the suspension.
  • the suspension comprises electronically controllable damping means, by which a damping of the suspension is variable and the damping means in response to the vehicle speed representing control variable can be controlled.
  • the damping means may be formed as an electronically adjustable throttle valve, by which the suspension rate or damping rate of the suspension can be varied by, for example, the line cross-section leading to a hydraulic accumulator of the suspension is reduced or increased.
  • one or more control values for the damping means can be input by the input device, which are used by the control unit as a function of the control variable representing the vehicle speed for controlling the damping means.
  • different predefinable damping rates can be set depending on the vehicle speed or controlled by the control unit, so that, for example, with increasing vehicle speeds, the damping rate of the suspension is increased.
  • the control values for the damping rates may be in the form of individual control values or in the form of a damping curve as a function of the vehicle speed in the input device be entered so that a continuous, continuous adjustment of the damping can be done to the vehicle speed.
  • FIG. 1 shows a vehicle 10 in the form of an agricultural tractor, which is equipped with a charger device 12.
  • the charger device 12 is designed as a front-end loader or front loader.
  • the vehicle 10 has a vehicle frame 14 to which a console 16 for attaching the charger device 12 is attached. Furthermore, the vehicle 10 comprises a vehicle cabin 17.
  • the charger device 12 comprises a mast 18 with which it is connected to the console 16. Furthermore, the charger device 12 comprises a loader rocker 20, which is equipped with a working tool 22 in the form of a loading bucket 24.
  • the working tool 22 is formed here only as an example as a loading shovel 24. Of course you can too other work tools 22, such as a forklift or a gripper can be used.
  • a hydraulic cylinder 26 which is operable to raise and lower the loader rocker 20 by means of a hydraulic system 28.
  • the hydraulic system 28 for lifting and lowering the loader rocker 20 is in FIG. 2 illustrated by a schematic hydraulic circuit diagram.
  • the hydraulic system 28 comprises a hydraulic tank 30, a hydraulic pump 32, a main control valve 34, one or more hydraulic cylinders 26, a switching valve 36 and a hydraulic accumulator 38. Further, a pressure limiting device 40 is provided.
  • the main control valve 34 is formed as a 4/3-way valve with locking center position and connects the hydraulic cylinder 26 to the hydraulic pump 32 and the hydraulic tank 30, wherein the hydraulic cylinder 26 as a double-acting hydraulic cylinder 26 with a lift-side chamber 42 (piston side) and a lower-side chamber 44th (rod side) is formed.
  • the hydraulic cylinder can in this case also be designed to act unilaterally, so that the lower-side chamber is eliminated.
  • the lifting position 46 the lifting function is triggered, in which the stroke-side chamber 42 is connected to the hydraulic pump 32 and drain the hydraulic oil from the lower-side chamber 44 into the hydraulic tank 30 can.
  • the loader rocker 20 In the lifting position 46, the loader rocker 20 can be raised.
  • the holding position 48 In a second switching position, the holding position 48, the holding function is triggered, in which the stroke-side and the lower-side chamber 42, 44 of hydraulic pump 32 and hydraulic tank 30 are separated and no hydraulic oil from the hydraulic pump 32 to the hydraulic cylinder 26 can flow or no hydraulic oil from Hydraulic cylinder 26 can flow to the hydraulic tank 30 back.
  • the holding position 48 With the holding position 48, the loader rocker 20 can be held in a corresponding pivoting position.
  • the lowering position 50 the lowering function is triggered, in which the lowering-side chamber 42 is connected to the hydraulic pump 32 and the hydraulic oil can flow from the stroke-side chamber 44 into the hydraulic tank 30.
  • the loader rocker 20 can be lowered.
  • the individual switch positions can be selected, for example via a manual control lever 52 or joystick by the driver.
  • the stroke-side chamber 42 of the hydraulic cylinder 26 is further connected to the switching valve 36, which is designed as electronically controllable 2/2-way valve. It has a passage position 54 and a closed position 56.
  • the switching valve 36 connects via a line 58, the stroke-side chamber 42 to the hydraulic accumulator 38, wherein in the passage position 54, the stroke-side chamber 42 is connected to the hydraulic accumulator 38 and in the closed position 56 is separated from this.
  • hydraulic oil can flow under load from the lift-side chamber 42 into the hydraulic accumulator 38 or flow back into the stroke-side chamber 42, so that a suspension function for the hydraulic cylinder 26 or for the loader swing 20 sets.
  • the hydraulic system 28 comprises an electronic control unit 60, an activation switch 62, a speed sensor 64 and an input device 66.
  • the electronic control unit 60 can be arranged both in the vehicle 10 and on the charger device 12 itself. It can also be designed as part of an already existing on the vehicle 10 electronic control unit or be implemented there.
  • the speed sensor can be designed as any sensor representing the speed of the vehicle 10, in particular as a speed sensor which is arranged in the drive train or on the drive axles of the vehicle 10. It is also conceivable to pick up a speed signal from an existing CANBUS system and forward it to the control unit 60.
  • the electronic control unit 60 is connected to the activation switch 62 for activating the hydraulic Suspension, with a speed sensor 64 for detecting or detecting the vehicle speed or for detecting a vehicle speed representing size and connected to the input device 66 for input of manipulated variables and threshold values and for selecting one or more operating modes.
  • the activation switch 62 and the input device 66 are preferably arranged in the vehicle cabin 17 and can be operated by a driver there.
  • the hydraulic suspension of the hydraulic system can be activated.
  • the electronic control unit 60 then generates a corresponding control signal and switches the switching valve 36 in passage position 54.
  • In the control unit 60 are also one or more thresholds, upon reaching a control signal for driving the switching valve to be generated, preset or stored (stored).
  • the sensor signals or sensor signal quantities supplied by the speed sensor 64 are compared with the threshold value stored in the control unit 60. If the driving speed decreases and reaches the preset threshold value, the control unit 60 generates a corresponding control signal which switches the switching valve 36 into its closed position 56 and thus deactivates or shuts off the hydraulic suspension. If acceleration is accelerated again and the driving speed increases again, a corresponding control signal is again generated by the electronic control unit 60 when the preset threshold value is reached and the switching valve 36 is again switched to its passage position 54, and thus the hydraulic suspension again activated or turned on.
  • the abovementioned threshold values can be freely selected by the vehicle driver and entered via the input device 66 and stored in the control unit 60. Furthermore, a corresponding operating mode can be selected in the input device 66, which allows the electronic control unit 60 to be operated without automatic, driving-speed-dependent control. If this mode is activated, the suspension can be activated or deactivated manually via the activation switch 62, irrespective of the driving speed or independent of a vehicle speed signal.
  • a throttle device in the form of a throttle valve 68 is further provided.
  • the throttle valve 68 is arranged in the line 58 between the switching valve 36 and hydraulic accumulator 38 and also controlled according to predetermined set values or manipulated variables via the electronic control unit 60.
  • a passage cross-section of the throttle valve 68 and thus the damping of the hydraulic suspension can then be electronically varied as a function of the driving speed. For example, can be reduced with increasing speed of the throttle cross-section of the throttle valve 68, so that a harder suspension (higher damping of the suspension) adjusts.
  • an enlargement of the throttle cross section can automatically also with decreasing driving speed be made so that sets a softer suspension (lower damping of the suspension).
  • the control values or manipulated variables required for this purpose can be input and stored by the driver in the input device 66.
  • a damping function can be selected or deselected via the operating modes. It is also possible to deposit damping curves as a function of the vehicle speed, which make it possible to select different damping characteristics for different operating states.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Vehicle Body Suspensions (AREA)
  • Operation Control Of Excavators (AREA)
EP09176120A 2008-11-19 2009-11-16 Véhicule doté d'un dispositif de charge Withdrawn EP2189581A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008043845A DE102008043845A1 (de) 2008-11-19 2008-11-19 Fahrzeug mit Ladevorrichtung

Publications (1)

Publication Number Publication Date
EP2189581A1 true EP2189581A1 (fr) 2010-05-26

Family

ID=41664764

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09176120A Withdrawn EP2189581A1 (fr) 2008-11-19 2009-11-16 Véhicule doté d'un dispositif de charge

Country Status (6)

Country Link
US (1) US20100125394A1 (fr)
EP (1) EP2189581A1 (fr)
BR (1) BRPI0904496A2 (fr)
CA (1) CA2685664A1 (fr)
DE (1) DE102008043845A1 (fr)
EA (1) EA200901368A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2556737A1 (fr) * 2011-08-09 2013-02-13 AGCO International GmbH Moyens de commande de réglage de l'amortissement d'un outil fixé à un véhicule
EP2857592A1 (fr) * 2013-10-01 2015-04-08 Deere & Company Système de chargeur frontal
WO2026062217A1 (fr) 2024-09-20 2026-03-26 JOST Umeå Aktiebolag Système de chargement pour un tracteur et véhicule de travail

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR112014017903B1 (pt) 2012-01-20 2021-05-18 Cnh Industrial America Llc método para controlar um sistema de controle de deslocamento para um veículo e sistema de controle de deslocamento para um veículo

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0280721A (ja) * 1989-07-27 1990-03-20 Yutani Heavy Ind Ltd 車輪式建設機械の自動振動抑制装置
DE3909205C1 (fr) * 1989-03-21 1990-05-23 Hanomag Ag, 3000 Hannover, De
US5520499A (en) * 1994-07-12 1996-05-28 Caterpillar Inc. Programmable ride control
JPH1136375A (ja) * 1997-07-22 1999-02-09 Komatsu Ltd 装輪式建設機械の走行振動制振油圧回路
FR2851592A1 (fr) * 2003-02-21 2004-08-27 Hydrokit Chargeur frontal pour vehicule de travaux publics ou agricoles et vehicule equipe d'un tel chargeur
JP2006045852A (ja) * 2004-08-03 2006-02-16 Hitachi Constr Mach Co Ltd 液圧回路の液圧制御装置
US20070056277A1 (en) * 2004-10-07 2007-03-15 Norihide Mizoguchi Travel vibration suppressing device for working vehicle

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5147172A (en) * 1991-09-03 1992-09-15 Caterpillar Inc. Automatic ride control
US5890870A (en) * 1996-09-25 1999-04-06 Case Corporation Electronic ride control system for off-road vehicles
DE19754828C2 (de) * 1997-12-10 1999-10-07 Mannesmann Rexroth Ag Hydraulische Steueranordnung für eine mobile Arbeitsmaschine, insbesondere für einen Radlader, zur Dämpfung von Nickschwingungen
JP4685417B2 (ja) * 2004-11-16 2011-05-18 日立建機株式会社 作業車両用液圧制御装置
US7793740B2 (en) * 2008-10-31 2010-09-14 Caterpillar Inc Ride control for motor graders

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3909205C1 (fr) * 1989-03-21 1990-05-23 Hanomag Ag, 3000 Hannover, De
JPH0280721A (ja) * 1989-07-27 1990-03-20 Yutani Heavy Ind Ltd 車輪式建設機械の自動振動抑制装置
US5520499A (en) * 1994-07-12 1996-05-28 Caterpillar Inc. Programmable ride control
JPH1136375A (ja) * 1997-07-22 1999-02-09 Komatsu Ltd 装輪式建設機械の走行振動制振油圧回路
FR2851592A1 (fr) * 2003-02-21 2004-08-27 Hydrokit Chargeur frontal pour vehicule de travaux publics ou agricoles et vehicule equipe d'un tel chargeur
JP2006045852A (ja) * 2004-08-03 2006-02-16 Hitachi Constr Mach Co Ltd 液圧回路の液圧制御装置
US20070056277A1 (en) * 2004-10-07 2007-03-15 Norihide Mizoguchi Travel vibration suppressing device for working vehicle

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
LODIGE H ET AL: "AKTIVE SCHWINGUNGSDAMPFUNG FUR UNGEFEDERTE ARBEITSMASCHINEN", O + P OLHYDRAULIK UND PNEUMATIK, VEREINIGTE FACHVERLAGE, MAINZ, DE, vol. 39, no. 3, 1 March 1995 (1995-03-01), pages 188 - 192, XP000492760, ISSN: 0341-2660 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2556737A1 (fr) * 2011-08-09 2013-02-13 AGCO International GmbH Moyens de commande de réglage de l'amortissement d'un outil fixé à un véhicule
EP2857592A1 (fr) * 2013-10-01 2015-04-08 Deere & Company Système de chargeur frontal
WO2026062217A1 (fr) 2024-09-20 2026-03-26 JOST Umeå Aktiebolag Système de chargement pour un tracteur et véhicule de travail

Also Published As

Publication number Publication date
EA200901368A1 (ru) 2010-06-30
CA2685664A1 (fr) 2010-05-19
US20100125394A1 (en) 2010-05-20
BRPI0904496A2 (pt) 2010-09-21
DE102008043845A1 (de) 2010-05-20

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