DE20012939U1 - Hydrostatic system consisting of a hydraulic variable pump and a hydraulic motor connected to it - Google Patents

Hydrostatic system consisting of a hydraulic variable pump and a hydraulic motor connected to it

Info

Publication number
DE20012939U1
DE20012939U1 DE20012939U DE20012939U DE20012939U1 DE 20012939 U1 DE20012939 U1 DE 20012939U1 DE 20012939 U DE20012939 U DE 20012939U DE 20012939 U DE20012939 U DE 20012939U DE 20012939 U1 DE20012939 U1 DE 20012939U1
Authority
DE
Germany
Prior art keywords
adjusting
hydrostatic system
variable displacement
displacement pump
pump
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 - Lifetime
Application number
DE20012939U
Other languages
German (de)
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.)
Liebherr Machines Bulle SA
Original Assignee
Liebherr Machines Bulle SA
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 Liebherr Machines Bulle SA filed Critical Liebherr Machines Bulle SA
Priority to DE20012939U priority Critical patent/DE20012939U1/en
Priority to EP01954055A priority patent/EP1521905A2/en
Priority to PCT/EP2001/008560 priority patent/WO2002008611A2/en
Publication of DE20012939U1 publication Critical patent/DE20012939U1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
    • F15B11/042—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the feed line, i.e. "meter in"
    • F15B11/0423—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the feed line, i.e. "meter in" by controlling pump output or bypass, other than to maintain constant speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/02—Controlling of coolant flow the coolant being cooling-air
    • F01P7/04—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio
    • F01P7/044—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio using hydraulic drives
    • 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
    • F15B7/00—Systems in which the movement produced is definitely related to the output of a volumetric pump; Telemotors
    • 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
    • F15B2211/20507—Type of prime mover
    • F15B2211/20515—Electric motor
    • 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
    • F15B2211/2053—Type of pump
    • F15B2211/20546—Type of pump variable capacity
    • F15B2211/20553—Type of pump variable capacity with pilot circuit, e.g. for controlling a swash plate
    • 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
    • F15B2211/255—Flow control functions
    • 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
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40515—Flow control characterised by the type of flow control means or valve with variable throttles or orifices
    • 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
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
    • F15B2211/50518—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using pressure relief 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
    • F15B2211/50—Pressure control
    • F15B2211/52—Pressure control characterised by the type of actuation
    • F15B2211/526—Pressure control characterised by the type of actuation electrically or electronically
    • 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/615—Filtering means
    • 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/62—Cooling or heating means
    • 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/6343—Electronic controllers using input signals representing a temperature
    • 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/665—Methods of control using electronic components
    • F15B2211/6656—Closed loop control, i.e. control using feedback
    • 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
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7058—Rotary output members
    • 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
    • F15B2211/75—Control of speed of the output member

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Reciprocating Pumps (AREA)
  • Valve Device For Special Equipments (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Electromagnetic Pumps, Or The Like (AREA)

Description

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßtThe description text was not recorded electronically

Claims (8)

1. Hydrostatisches Sytem, bestehend aus einer hydraulischen Verstellpumpe, vorzugsweise einer verstellbaren Axialkolbenpumpe (1), und einem mit dieser verbundenen hydraulischen Motor, vorzugsweise einem Axialkolbenmotor, (12) zum Antrieb eines Lüfters (14) eines Wärmetauschers (15) eines Ver­ brennungsmotors, vorzugsweise eines Dieselmotors, dadurch gekennzeichnet, daß die Verstellpumpe (1) in der Weise an das Gehäuse (31) des Verbren­ nungsmotors angeflanscht ist, daß die Antriebswelle (2) der Verstellpumpe (1) getriebemäßig mit der Kurbelwelle oder dem Steuerräderwerk des Verbren­ nungsmotors verbunden ist. 1. Hydrostatic system consisting of a hydraulic variable displacement pump, preferably an adjustable axial piston pump ( 1 ), and a hydraulic motor connected to it, preferably an axial piston motor ( 12 ) for driving a fan ( 14 ) of a heat exchanger ( 15 ) of an internal combustion engine, Preferably a diesel engine, characterized in that the variable displacement pump ( 1 ) is flanged to the housing ( 31 ) of the combustion engine in such a way that the drive shaft ( 2 ) of the variable displacement pump ( 1 ) is connected in a geared manner to the crankshaft or the control gear train of the combustion engine is. 2. Hydrostatisches System nach dem Oberbegriff des Anspruchs 1 oder nach Anspruch 1, dadurch gekennzeichnet, daß der Verstellhebel oder Verstellme­ chanismus der Verstellpumpe (1) durch zwei Stellzylinder (7, 8) gegensinnig verstellbar ist und beide Stellzylinder durch eine Steuerleitung (20, 21) von dem Hochdruck in der die Verstellpumpe (1) mit dem Verstellmotor (12) ver­ bindenden Hochdruckleitung (11) gesteuert sind, daß die Verstellpumpe (1) bei Druckgleichheit in der Steuerleitung (20, 21) auf höchste Förderleistung (höchstes Fördervolumen) verstellt wird und ein von der Temperatur des Wärmetauschers (15) gesteuertes Regelventil (24) vorgesehen ist, das bei benötigter verringerter Lüfterleistung über die Stellzylinder (7, 8) den Verstell­ mechanismus auf verringerte Pumpleistung bewegt.2. Hydrostatic system according to the preamble of claim 1 or according to claim 1, characterized in that the adjusting lever or Verstellme mechanism of the variable pump ( 1 ) by two actuating cylinders ( 7 , 8 ) is adjustable in opposite directions and both actuating cylinders by a control line ( 20 , 21st ) are controlled by the high pressure in the variable displacement pump ( 1 ) with the adjusting motor ( 12 ) ver binding high pressure line ( 11 ) that the variable displacement pump ( 1 ) adjusts to the highest delivery rate (highest delivery volume) if the pressure in the control line ( 20 , 21 ) is equal is and from the temperature of the heat exchanger ( 15 ) controlled control valve ( 24 ) is provided, which moves the adjusting mechanism to reduced pumping power when the reduced fan power is required via the actuating cylinders ( 7 , 8 ). 3. Hydrostatisches System nach Anspruch 1 oder 2, dadurch gekennzeichnet,
daß der federbelastete Stellkolben (5) des die Verstellpumpe (1) auf geringere Förderleistung verstellenden Stellzylinders (7) eine kleinere Kolbenfläche auf­ weist als der federbelastete Stellkolben (6) des die Verstellpumpe (1) auf hö­ here Förderleistung verstellenden Stellzylinders (8) und
daß in der Steuerleitung (20, 21) zwischen den Stellzylindern (7, 8) eine Dros­ sel (22) und in die zu dem Stellzylinder (8) mit größerer Kolbenfläche seines Stellkolbens (6) führenden Leitung (21, 22) ein regelbares Druckventil (23) geschaltet sind, das von der Temperatur des Wärmetauschers (15) über eine Steuereinheit (24) in der Weise gesteuert ist, daß es mit abnehmenden Bedarf an Lüfterleistung zunehmend geöffnet wird.3. Hydrostatic system according to claim 1 or 2, characterized in
that the spring-loaded adjusting piston ( 5 ) of the adjusting pump ( 1 ) adjusting the lower delivery rate adjusting cylinder ( 7 ) has a smaller piston area than the spring-loaded adjusting piston ( 6 ) of the adjusting pump ( 1 ) adjusting the delivery rate ( 8 ) higher here and
that in the control line ( 20 , 21 ) between the actuating cylinders ( 7 , 8 ) a Dros sel ( 22 ) and in the to the actuating cylinder ( 8 ) with a larger piston area of its actuating piston ( 6 ) leading line ( 21 , 22 ) a controllable pressure valve ( 23 ) are connected, which is controlled by the temperature of the heat exchanger ( 15 ) via a control unit ( 24 ) in such a way that it is increasingly opened as the demand for fan power decreases. 4. Hydrostatisches System nach einem der Ansprüche 1 bis 3, dadurch gekenn­ zeichnet, daß das regelbare Druckventil (23) ein gesteuertes Magnetventil ist, das bei Ausfall der Steuerung in den geschlossenen Zustand geht.4. Hydrostatic system according to one of claims 1 to 3, characterized in that the controllable pressure valve ( 23 ) is a controlled solenoid valve which goes into the closed state when the control fails. 5. Hydrostatisches System nach einem der Ansprüche 1 bis 4, dadurch gekenn­ zeichnet, daß das System im offenen Kreislauf mit eigener Ölversorgung be­ trieben wird. 5. Hydrostatic system according to one of claims 1 to 4, characterized indicates that the system be in an open circuit with its own oil supply is driven.   6. Hydrostatisches System nach einem der Ansprüche 1 bis 4, dadurch gekenn­ zeichnet, daß das System von dem Schmierölkreislauf des Verbrennungs­ motors mit Öl versorgt wird.6. Hydrostatic system according to one of claims 1 to 4, characterized records that the system from the lubricating oil circuit of the combustion motors is supplied with oil. 7. Hydrostatisches System nach Anspruch 6, dadurch gekennzeichnet, daß in die von dem Schmierölkreislauf zu der Verstellpumpe führenden Leitung ein Druckminderventil (26) geschaltet ist.7. Hydrostatic system according to claim 6, characterized in that a pressure reducing valve ( 26 ) is connected in the line leading from the lubricating oil circuit to the variable displacement pump. 8. Hydrostatisches System nach einem der Ansprüche 1 bis 7, dadurch gekenn­ zeichnet, daß die Antriebswelle (2) der Verstellpumpe (1) über eine Verbin­ dungsleitung von dem Schmierölkreislauf des Verbrennungsmotors ge­ schmiert und in die Verbindungsleitung eine Drossel (28) oder ein Druckmin­ derventil geschaltet sind.8. Hydrostatic system according to one of claims 1 to 7, characterized in that the drive shaft ( 2 ) of the variable displacement pump ( 1 ) lubricates via a connec tion line from the lubricating oil circuit of the internal combustion engine and in the connecting line a throttle ( 28 ) or a pressure min the valve are switched.
DE20012939U 2000-07-26 2000-07-26 Hydrostatic system consisting of a hydraulic variable pump and a hydraulic motor connected to it Expired - Lifetime DE20012939U1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE20012939U DE20012939U1 (en) 2000-07-26 2000-07-26 Hydrostatic system consisting of a hydraulic variable pump and a hydraulic motor connected to it
EP01954055A EP1521905A2 (en) 2000-07-26 2001-07-24 Hydrostatic system comprising a hydraulic variable displacement pump and a hydraulic motor connected thereto
PCT/EP2001/008560 WO2002008611A2 (en) 2000-07-26 2001-07-24 Hydrostatic system, equipped with a hydraulic displacement pump, for the radiator of an internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE20012939U DE20012939U1 (en) 2000-07-26 2000-07-26 Hydrostatic system consisting of a hydraulic variable pump and a hydraulic motor connected to it

Publications (1)

Publication Number Publication Date
DE20012939U1 true DE20012939U1 (en) 2001-12-06

Family

ID=7944436

Family Applications (1)

Application Number Title Priority Date Filing Date
DE20012939U Expired - Lifetime DE20012939U1 (en) 2000-07-26 2000-07-26 Hydrostatic system consisting of a hydraulic variable pump and a hydraulic motor connected to it

Country Status (3)

Country Link
EP (1) EP1521905A2 (en)
DE (1) DE20012939U1 (en)
WO (1) WO2002008611A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011016983A1 (en) 2011-04-14 2012-10-18 Magna Car Top Systems Gmbh Device for holding convertible top of cabriolet vehicle in closed position on vehicle-side holding location, has hook device coupled with locking device such that actuation of actuator is performed to adjust hook

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2163153B2 (en) * 1971-01-06 1973-09-20 Sperry Rand Corp., Troy, Mich. (V.St.A.) Control valve for a hydrostatic flow control device of a setting pump in a hydrostatic transmission with a closed circuit
DE3538643A1 (en) * 1985-10-30 1987-05-14 Rexroth Mannesmann Gmbh Device for controlling the pressure of a hydrostatic drive
DE4141492A1 (en) * 1991-12-16 1993-06-17 Rexroth Mannesmann Gmbh HYDRAULIC ARRANGEMENT FOR WORKING MACHINES
DE19538899A1 (en) * 1995-10-19 1997-04-24 Rexroth Mannesmann Gmbh Cooler fan hydrostatic drive e.g. for diesel engine of heavy goods vehicle

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4433648A (en) * 1980-06-10 1984-02-28 Leblanc James C Control means for engine cooling systems
US4461246A (en) * 1981-11-13 1984-07-24 Roger Clemente Hydraulically operated fan assembly for a heat exchange assembly

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2163153B2 (en) * 1971-01-06 1973-09-20 Sperry Rand Corp., Troy, Mich. (V.St.A.) Control valve for a hydrostatic flow control device of a setting pump in a hydrostatic transmission with a closed circuit
DE3538643A1 (en) * 1985-10-30 1987-05-14 Rexroth Mannesmann Gmbh Device for controlling the pressure of a hydrostatic drive
DE4141492A1 (en) * 1991-12-16 1993-06-17 Rexroth Mannesmann Gmbh HYDRAULIC ARRANGEMENT FOR WORKING MACHINES
DE19538899A1 (en) * 1995-10-19 1997-04-24 Rexroth Mannesmann Gmbh Cooler fan hydrostatic drive e.g. for diesel engine of heavy goods vehicle

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ORTWIG,Harald: Automotiver Fahrantrieb für selbstfahrende Arbeitsmaschinen. In: antriebs- technik 31, 1992, Nr.3, S.89-93 *

Also Published As

Publication number Publication date
EP1521905A2 (en) 2005-04-13
WO2002008611A3 (en) 2005-02-10
WO2002008611A2 (en) 2002-01-31

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