EP0129652B1 - Système hydraulique de commande des circuits hydrauliques de direction et de travail pour les véhicules - Google Patents

Système hydraulique de commande des circuits hydrauliques de direction et de travail pour les véhicules Download PDF

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Publication number
EP0129652B1
EP0129652B1 EP84103939A EP84103939A EP0129652B1 EP 0129652 B1 EP0129652 B1 EP 0129652B1 EP 84103939 A EP84103939 A EP 84103939A EP 84103939 A EP84103939 A EP 84103939A EP 0129652 B1 EP0129652 B1 EP 0129652B1
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EP
European Patent Office
Prior art keywords
valve
hydraulic
pressure fluid
circuit
power
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.)
Expired
Application number
EP84103939A
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German (de)
English (en)
Other versions
EP0129652A1 (fr
Inventor
Heribert Dipl.-Landwirt Adams
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.)
Kloeckner Humboldt Deutz AG
Original Assignee
Kloeckner Humboldt Deutz AG
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 Kloeckner Humboldt Deutz AG filed Critical Kloeckner Humboldt Deutz AG
Priority to AT84103939T priority Critical patent/ATE27640T1/de
Publication of EP0129652A1 publication Critical patent/EP0129652A1/fr
Application granted granted Critical
Publication of EP0129652B1 publication Critical patent/EP0129652B1/fr
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20576—Systems with pumps with multiple pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30505—Non-return valves, i.e. check valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3105—Neutral or centre positions
    • F15B2211/3116—Neutral or centre positions the pump port being open in the centre position, e.g. so-called open centre
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40523—Flow control characterised by the type of flow control means or valve with flow dividers
    • F15B2211/4053—Flow control characterised by the type of flow control means or valve with flow dividers using valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
    • F15B2211/41554—Flow control characterised by the connections of the flow control means in the circuit being connected to a return line and a directional control valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/42—Flow control characterised by the type of actuation
    • F15B2211/428—Flow control characterised by the type of actuation actuated by fluid pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/46—Control of flow in the return line, i.e. meter-out control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
    • F15B2211/7142—Multiple output members, e.g. multiple hydraulic motors or cylinders the output members being arranged in multiple groups
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/78—Control of multiple output members
    • F15B2211/781—Control of multiple output members one or more output members having priority

Definitions

  • the invention relates to a hydraulic control system for the steering and working hydraulics including a controllable power lift system on vehicles, in particular agricultural tractors, with two hydraulic circuits, each connected to a hydraulic pump and connectable to one another by actuating a short-circuit valve, for supplying hydraulic consumers with hydraulic fluid, the first hydraulic circuit the hydraulic steering system is supplied by the hydraulic pump via an element that primarily supplies pressure fluid and the amount of fluid not required for the steering flows to the downstream power lift via one or more directional control valves for other consumers, and in the second hydraulic circuit the hydraulic pump supplies the hydraulic pump through the short-circuit valve with the when the fluid is not required Storage container is connected.
  • a control system of this type has become known [ ⁇ lhydraulik & Pneumatik 24 (1980) No. 11, p. 810, Figure 4], the one hydraulic pump being connected to a flow divider which primarily supplies the steering hydraulics with hydraulic fluid. The residual flow coming from the flow divider is fed to the power lift and is sufficient in terms of quantity for the regulating mode of operation.
  • the second hydraulic pump is connected directly to the reservoir via a connecting valve and to the hydraulic circuit of the first hydraulic pump via a check valve. When a directional valve for supplying one of the other consumers with pressure fluid is actuated, the changeover valve is closed by means of a control pressure, so that sufficient pressure fluid flows to the consumer through the combination of the two hydraulic circuits.
  • the second hydraulic circuit can only be used in conjunction with the first hydraulic circuit, so that the two hydraulic circuits cannot be used separately, as is desirable in some cases.
  • the invention is based on the object, while avoiding the described disadvantage, of improving a control system of the type outlined at the outset in such a way that the two hydraulic circuits present in the control system are also available separately from one another for the supply of hydraulic consumers if required. It should also be ensured that the connection valve does not respond to short control pulses from the power lift.
  • At least one directional valve for supplying other consumers with pressure fluid is arranged in the line between the hydraulic pump and the short-circuit valve in the second hydraulic circuit, and that, like the other directional valve, has a neutral circulation, that the output of the neutral circulation of the first-mentioned directional valve
  • a check valve is connected to the input of the directional control valve in the other hydraulic circuit, that the short-circuit valve normally connects the outlet of the neutral circulation of the first-mentioned directional control valve to the reservoir and, when the directional control valve in the other hydraulic circuit or a power lift control valve is actuated, this bypass closes so that the power lift Control valve can be actuated via a pilot valve and the pilot pressure for the control valve is simultaneously supplied to the short-circuit valve for actuation in the closing direction and that the supply of the pilot pressure to the short-circuit valve via an inlet-retarding throttle element.
  • the second hydraulic circuit can also be used for other consumers when operating the power lift in the first hydraulic circuit, since the power lift for the normal course of work (control) manages with the delivery volume of this hydraulic pump that is not used by the steering hydraulics.
  • a further development of the invention provides that the steering hydraulics for supplying hydraulic fluid is connected to the hydraulic pump via a priority valve.
  • the working resistance In such a hydraulic control system in which the like for controlling or regulating the power lift according to given setpoints or actual values of the position, the working resistance. required components of a working device are combined in one device, it is useful if the short-circuit valve is a component of the control device.
  • Two hydraulic pumps 1 and 2 which are preferably designed as tandem pumps, are connected on the suction side via lines 3 and 4 and a filter 5 and 6, respectively, to the reservoir 7 for pressure fluid.
  • the hydraulic pump 1 supplies a first hydraulic circuit with a steering hydraulic system 8, which is connected via a priority valve 10 to a line 11 emanating from the hydraulic pump on the pressure side.
  • a line 12 leads from the priority valve 10 back to the storage container 7.
  • the priority valve 10 is designed such that it only supplies the hydraulic fluid quantity required for steering to the steering hydraulics.
  • a line 13 leading from the priority valve 10 leads through a valve block 14 to a directional valve block 15 in which a directional valve 16 assigned to the first hydraulic circuit is shown in simplified form.
  • a control control unit 18 for a power lift is flanged to the directional valve block 15, the lifting cylinder of which is designated by 19.
  • the line 13 coming from the directional control valve 16 is connected to a control valve 20 on the input side.
  • the control valve 20 is connected on the output side through a line 21 to a line 22 which is connected to the reservoir 7 via a hydraulic fluid cooler 23 and a filter 24.
  • a line 25 branches off from the line 13 in the flow direction upstream of the control valve 20 and is connected to one end face 27 of the control valve 20 by means of a control line 26 and to a line 30 via a spring-reinforced check valve 28.
  • the line 30 connects the lifting cylinder 19 of the power lift via a flow control valve 31 to a pilot valve 32 of the power lift system arranged in the reservoir 7.
  • the pilot valve 32 designed as a three-way valve is also connected by a line 33 to the end face 35 of the control valve 20 which is loaded by a spring 34.
  • the pilot spool 32 is activated by a control linkage, not shown, which compares actual values of tensile force or position measurements with predetermined target values.
  • a short-circuit valve 37 which is loaded on its one end 38 in the closing direction by a spring 39 and the other end 40 of which is connected to the line 13 by a line 41.
  • the spring-side end face 38 of the short-circuit valve 37 is connected to the line 33 by control lines 42, 43, a check valve 44 being arranged in line 42 and a throttle element 45 being arranged in line 43.
  • a line 46 leads to the line 22 on the return side.
  • a line 47 in which a throttle element 48 is arranged.
  • the other hydraulic pump 2 is connected to a directional valve block 51 on the pressure side by means of a line 50 and a valve block 14 to supply a second hydraulic circuit, a single directional valve 52 being shown in simplified form.
  • the line 50 is connected via a check valve 53 to the line 13 of the first hydraulic circuit supplied by the hydraulic pump 1.
  • the check valve 53 In the flow direction upstream of the check valve 53, there is a connection between the line 50 in the inlet of the short-circuit valve 37 through a line 54.
  • the hydraulic pump 1 continuously pumps hydraulic fluid into the first hydraulic circuit during operation, the hydraulic steering system being primarily supplied with hydraulic fluid.
  • the priority valve 10 only controls the hydraulic fluid quantity required for steering directly to the steering hydraulics 8, while for the rest of the time in which there is no steering, the full pressure medium flow is available to the other consumers, in particular this hydraulic circuit. If no other consumer is connected to the first hydraulic circuit, the amount of hydraulic fluid not required by the steering flows through line 13 and directional valve block 15 as well as through control valve 20 and lines 21 and 22 back to reservoir 7.
  • pilot valve 32 becomes on these acting sink pulses from the neutral position shown to the right and with lifting pulses to the left.
  • the short-circuit valve 37 On the end face 40 of the short-circuit valve 37, the pressure present in the line 13 is constantly present, while on the end face 38 of the open control spool 32, only the force of the spring 39 acts.
  • the short-circuit valve 37 is thus in the through position shown.
  • the pilot valve 32 When the power lift is operating, the pilot valve 32 is only moved briefly from the neutral position in one direction or the other due to the short control times that occur during "regulation" thereof.
  • these short movements of the pilot spool 32 are in no way sufficient to build up a control pressure on the end face 38 of the short-circuit valve 37 as a result of the throttle 45 connected upstream as a delay element, which, supported by the force of the spring 39, is large enough to influence the short-circuit valve 37 in the closing direction.
  • a directional control valve 16 in the directional control valve block 15 When a directional control valve 16 in the directional control valve block 15 is activated, the pressure medium in line 13 is shut off and supplied to a consumer (not shown). The line 13 is depressurized behind the directional control valve 16. The short-circuit valve 37 is then moved in the closing direction by the force of the spring 39 and the outflow of the pressure medium from the circuit of the hydraulic pump 2 is shut off via the lines 54, 46.
  • the directional control valves 16 always have the flow rates of both hydraulic circuits available, provided directional control valves 52 are not activated.
  • One or more consumers can be connected to the second hydraulic circuit supplied by the hydraulic pump 2 independently of the first hydraulic circuit and can be switched on and off via the directional valves 52.
  • one of the consumers connected to the second hydraulic circuit via one of the directional valves 52 can be a mower motor, while the lifting cylinder of the mower is connected to the first hydraulic circuit via one of the directional valves 16.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Power Steering Mechanism (AREA)

Claims (3)

1. Système hydraulique de commande de circuits hydrauliques de direction et de travail, y compris d'un dispositif réglable de levage (18,19, 32) sur des véhicules, notamment des tracteurs agricoles, avec deux circuits hydrauliques raccordés respectivement à une pompe hydraulique (1, 2) et susceptibles d'être reliés ensemble en actionnant une vanne de court-circuit (37) pour l'alimentation d'équipements hydrauliques utilisateurs avec un fluide sous pression, système dans lequel, dans un premier circuit hydraulique, l'hydraulique de direction (8) est alimentée à partir de la pompe hydraulique (1) par l'intermédiaire d'un élément (10) amenant en priorité ce liquide sous pression, tandis que la quantité de liquide non utilisée pour la direction arrive au dispositif de levage (19) branché à la suite par l'intermédiaire d'un ou plusieurs distributeurs (16) pour d'autres équipements utilisateurs, dans lequel, dans un second circuit hydraulique, la pompe hydraulique (2), lorsque le liquide sous pression n'est pas utilisé, est en communication par la vanne de court-circuit (37) avec le réservoir (7), système caractérisé en ce que dans le second circuit hydraulique, au moins un distributeur (52) pour l'alimentation d'autres équipements utilisateurs avec le liquide sous pression est disposé sur la canalisation (50) entre la pompe hydraulique (2) et la vanne de court-circuit (37), ce distributeur tout comme l'autre distributeur (16) comportant une circulation neutre, la sortie de la circulation neutre du premier distributeur mentionné (52) étant reliée par l'intermédiaire d'une soupape de retenue (53) à l'entrée du distributeur (16) dans l'autre circuit hydraulique, la vanne de court-circuit (37) reliant normalement la sortie de la circulation neutre du premier distributeur mentionné (52) avec le réservoir (7) et fermant cette dérivation lors de l'actionnement du distributeur (16) dans l'autre circuit hydraulique ou bien lors de l'actionnement d'une vanne de commande (20) du dispositif de levage, la vanne de commande (20) du dispositif de levage étant susceptible d'être actionnée par l'intermédiaire d'une vanne de pré-commande (32), et la pression de pré-commande pour la vanne de commande (20) étant simultanément amenée à la vanne du court-circuit (37) pour l'actionner en position de fermeture, et l'arrivée de la pression de commande à la soupape de court-circuit (37) s'effectuant par l'intermédiaire d'un organe d'étranglement retardant cette arrivée (soupape de retenue à étranglement 44, 45).
2. Système de commande selon la revendication 1, caractérisé en ce que l'hydraulique de direction (8) est reliée à la pompe hydraulique (1) par l'intermédiaire d'une vanne de priorité (10) pour l'alimentation avec le fluide sous pression.
3. Système de commande selon les revendications 1 et 2, dans lequel les composants nécessaires pour la commande ou bien pour la régulation du dispositif de levage (19) d'après des valeurs de consigne ou bien des valeurs réelles données de la position, de la résistance de travail, etc. d'un équipement de travail sont rassemblés dans un appareil (18), système caractérisé en ce que la vanne de court-circuit (37) est une partie constitutive de l'appareil de commande et de réglage (18).
EP84103939A 1983-05-28 1984-04-09 Système hydraulique de commande des circuits hydrauliques de direction et de travail pour les véhicules Expired EP0129652B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84103939T ATE27640T1 (de) 1983-05-28 1984-04-09 Hydraulisches steuersystem fuer die lenk- und arbeitshydraulik an fahrzeugen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3319533 1983-05-28
DE19833319533 DE3319533A1 (de) 1983-05-28 1983-05-28 Hydraulisches steuersystem fuer die lenk- und arbeitshydraulik an fahrzeugen

Publications (2)

Publication Number Publication Date
EP0129652A1 EP0129652A1 (fr) 1985-01-02
EP0129652B1 true EP0129652B1 (fr) 1987-06-03

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP84103939A Expired EP0129652B1 (fr) 1983-05-28 1984-04-09 Système hydraulique de commande des circuits hydrauliques de direction et de travail pour les véhicules

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EP (1) EP0129652B1 (fr)
AT (1) ATE27640T1 (fr)
DE (2) DE3319533A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5332053A (en) * 1993-01-26 1994-07-26 Aquilon Technologies Inc. Hydraulic drive system
CN110206776A (zh) * 2019-07-16 2019-09-06 郑州宇通重工有限公司 一种液压保压与自卸荷节能阀组
IT202100010601A1 (it) * 2021-04-27 2022-10-27 Cnh Ind Italia Spa Circuito idraulico per un veicolo agricolo provvisto di un sistema antisaturazione e metodo di controllo di antisaturazione
IT202100010577A1 (it) * 2021-04-27 2022-10-27 Cnh Ind Italia Spa Circuito idraulico per un veicolo agricolo provvisto di un sistema antisaturazione e metodo di controllo di antisaturazione

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3448576A (en) * 1967-08-17 1969-06-10 Westinghouse Air Brake Co Fluid control system
FR2039123A1 (fr) * 1969-12-19 1971-01-15 Poclain Sa
DE2437262B2 (de) * 1974-08-02 1976-09-02 Klöckner-Humboldt-Deutz AG, 5000 Köln Hydraulische steuereinrichtung fuer ein landwirtschaftlich nutzbares kraftfahrzeug
DE2458897A1 (de) * 1974-12-12 1976-06-24 Int Harvester Co Elbsttaetige steuereinrichtung zur verteilung von druckfluessigkeit einer druckfluessigkeitsquelle auf mehrere verschiedenrangige hydrauliksysteme
DE2625101C2 (de) * 1976-06-04 1985-11-14 Robert Bosch Gmbh, 7000 Stuttgart Hydraulische Steuereinrichtung zur volumenstromabhängigen Verteilung von Druckflüssigkeit auf zwei Systeme
DE2644717A1 (de) * 1976-10-04 1978-04-06 Abex Gmbh Hydraulische regeleinrichtung, insbesondere fuer knicklader mit lade- und lenkhydraulik
DE2837605A1 (de) * 1978-08-29 1980-03-06 Kloeckner Humboldt Deutz Ag Steuereinrichtung fuer den hydraulischen kraftheber eines schleppers
DE2855749A1 (de) * 1978-12-22 1980-06-26 Int Harvester Co Hydraulische steuereinrichtung zur verteilung von druckfluessigkeit mindestens einer, insbesondere von zwei druckfluessigkeitsquellen auf mehrere verschiedenrangige verbraucher
DE3237019C2 (de) * 1981-10-07 1994-07-28 Linde Ag Hublader mit einer Lenkanlage mit hydrostatischer Lenkkraftunterstützungsanlage

Also Published As

Publication number Publication date
DE3319533A1 (de) 1984-11-29
ATE27640T1 (de) 1987-06-15
DE3464083D1 (en) 1987-07-09
EP0129652A1 (fr) 1985-01-02

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