EP1253327A1 - Circuit de commande hydraulique - Google Patents

Circuit de commande hydraulique Download PDF

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Publication number
EP1253327A1
EP1253327A1 EP02008997A EP02008997A EP1253327A1 EP 1253327 A1 EP1253327 A1 EP 1253327A1 EP 02008997 A EP02008997 A EP 02008997A EP 02008997 A EP02008997 A EP 02008997A EP 1253327 A1 EP1253327 A1 EP 1253327A1
Authority
EP
European Patent Office
Prior art keywords
control
pressure
channel
valve
throttle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP02008997A
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German (de)
English (en)
Other versions
EP1253327B1 (fr
Inventor
Wölfgang Kötter
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.)
Robert Bosch GmbH
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Robert Bosch GmbH
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1253327A1 publication Critical patent/EP1253327A1/fr
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Publication of EP1253327B1 publication Critical patent/EP1253327B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • F15B11/161—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load
    • F15B11/165—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load for adjusting the pump output or bypass in response to demand
    • 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
    • F15B2211/20538—Type of pump constant capacity
    • 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
    • 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
    • F15B2211/25—Pressure control functions
    • F15B2211/253—Pressure margin control, e.g. pump pressure in relation to load 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
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30525—Directional control valves, e.g. 4/3-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
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/3056—Assemblies of multiple 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
    • F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
    • F15B2211/3157—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line
    • F15B2211/31576—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line having a single pressure source and a single output member
    • 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
    • F15B2211/35—Directional control combined with flow control
    • F15B2211/351—Flow control by regulating means in feed line, i.e. meter-in 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
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40507—Flow control characterised by the type of flow control means or valve with constant 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
    • F15B2211/40—Flow control
    • F15B2211/42—Flow control characterised by the type of actuation
    • F15B2211/426—Flow 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
    • F15B2211/40—Flow control
    • F15B2211/47—Flow control in one direction only
    • 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
    • F15B2211/50563—Pressure control characterised by the type of pressure control means the pressure control means controlling a differential 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
    • F15B2211/50—Pressure control
    • F15B2211/51—Pressure control characterised by the positions of the valve element
    • F15B2211/513—Pressure control characterised by the positions of the valve element the positions being continuously variable, e.g. as realised by proportional 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
    • F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
    • F15B2211/5158—Pressure control characterised by the connections of the pressure control means in the circuit being connected to a pressure source and an output member
    • 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
    • F15B2211/528—Pressure 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/605—Load sensing circuits
    • F15B2211/6051—Load sensing circuits having valve means between output member and the load sensing circuit
    • F15B2211/6054—Load sensing circuits having valve means between output member and the load sensing circuit using shuttle 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/605—Load sensing circuits
    • F15B2211/6051—Load sensing circuits having valve means between output member and the load sensing circuit
    • F15B2211/6055—Load sensing circuits having valve means between output member and the load sensing circuit 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/6306—Electronic controllers using input signals representing a pressure
    • F15B2211/6309—Electronic controllers using input signals representing a pressure the pressure being a pressure source supply 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/6306—Electronic controllers using input signals representing a pressure
    • F15B2211/6313—Electronic controllers using input signals representing a pressure the pressure being a load 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/6333—Electronic controllers using input signals representing a state of the pressure source, e.g. swash plate angle
    • 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

Definitions

  • the pressure compensator can be Activate working hydraulics so that they have a pressure accumulates, which corresponds to the system pressure or which coincides with With the help of a second pilot pressure relief valve, not shown lower than the system pressure can be adjusted.
  • a second pilot pressure relief valve not shown lower than the system pressure can be adjusted.
  • the hydraulic control device according to the invention with the characteristic features of claim 1 has in contrast the advantage that they are more versatile with a simpler design is applicable. Above all, it is suitable for different pressure medium supply devices, at who once used a constant flow pump with a pressure compensator can be, while in the other case using a variable displacement pump Regulator is applicable.
  • the control device is required relatively little additional valve effort, so they builds compact and inexpensive. Thanks to the special tap of the LS pressure between the connecting valve and throttle can Pressure build-up up to the maximum when the connecting valve is activated System pressure. The relief of the control line in LS control circuit in the rest position is maintained. Further the functional advantage is that regardless of the pump speed, the load must be kept constant can and can be easily determined with the help of the throttle.
  • FIG. 1 shows a first Embodiment of the hydraulic control device with Constant pump in a simplified representation
  • Figure 2 a second embodiment of the control device with Variable pump in a simplified representation.
  • FIG. 1 shows a first hydraulic control device 10, in which several directional control valves 11, 12, 13, 14 for control of hydraulic consumers not shown in detail are provided. That for a simple-looking function provided directional valve 11 and that for a double-acting Function provided directional valves 12 to 14 are together flanged and between a connecting plate 15 and one End plate 16 arranged so that it is a directional valve block 17 form.
  • the directional valve block 17 is one Constant pump 18 supplied with pressure medium, from one with 19 designated inlet connection in the connecting plate 15 an inlet channel 21 goes out, the connection plate 15 and penetrates all directional control valves 11 to 14 and to the end plate 16 leads. All directional valves 11 to are connected to this inlet channel 21 14 connected in parallel. Furthermore, the connection plate 15 a return port 22, with an all Directional control valves 11 to 14 penetrating return channel 23 in Connection is established and via a return line 24 a tank 25 is relieved.
  • connection plate 15 In the connection plate 15, the inlet connection 19 protrudes a bypass line 26 with the return port 22 in Connection, a pressure compensator in this bypass line 26 27 is switched.
  • the pressure compensator 27 is in itself known way on one side of the delivery pressure of the Constant pump 18 is pressurized while on the other Page of a control spring 28 and the signal pressure from one Control circuit 29 is applied.
  • a pressure relief valve 31 is provided, which is connected in the control circuit 29 and together with the pressure compensator 27 as a pilot operated pressure relief valve for the system pressure in the first control device 10 serves.
  • all directional control valves 11 to 11 are 14 in a manner known per se for a load pressure compensated Control trained, also known as the LS control referred to as.
  • all directional control valves are 11 to 14 connected to the control circuit 29 by each Directional control valve 11 to 14 a first control line 32 each via a shuttle valve 33 to a continuous second Control line 34 is connected, on the one hand in the Connection plate 15 leads to the pressure compensator 27 and on the other hand is connected to the end plate 16.
  • the control circuit 29 is thus the maximum load pressure of one of the actuated directional control valves 11 to 14 tapped and with this Signal pressure to the pressure compensator 27.
  • FIG. 1 also shows, there is a in the end plate 16
  • Cross channel 35 is arranged, via which the inlet channel 21 from adjacent directional valve 14 with the return channel 23 the same directional control valve 14 is connected.
  • the connecting valve 36 is here as simple 2/2 valve. It is also advisable to form the throttle 37 adjustable.
  • the second, continuous control line 34 to the transverse channel 35 so connected that the signal pressure between the Valve 36 and the downstream valve Throttle 37 taps.
  • the two components connecting valve 36 and adjustable throttle 37 are both in Working group and are designed accordingly large.
  • the constant pump 18 and the pressure compensator 27 form one here Pressure medium supply device 38 for the first Control device 10.
  • each the control spool in question in this directional valve deflected.
  • the maximum load pressure that occurs here becomes tapped via the directional valves 11 to 14 and in the Control circuit 29 selected, he the pressure compensator 27th applied.
  • the delivery pressure of the constant pump 18 is thereby ramped up and a load pressure compensated Control of the operated consumer can in itself take place in a known manner.
  • the connecting valve 36 in the End plate 16 is not actuated, so that it Cross channel 35 in the end plate 16 hydraulically blocked and thus allows pressure to build up in the inlet channel 21.
  • Control device 10 also has an additional function
  • Working hydraulics may be desired by the hydraulic Performance of a pressurized and directed to the tank Volume flow is used, so this can be independent of the Actuation of the directional control valves 11 to 14 using the Connection valve 36 can be reached.
  • Such an additional Function may be desired in many cases, e.g. if due to the load on the working hydraulics in a tractor at the start the oil should be heated.
  • Another Use case arises with a forklift Internal combustion engine and hydrostatic drive, which in Driving operations should be braked when the gas is removed.
  • the directional control valves 11 to 14 are located in their respective middle positions while that excited Connection valve 36 assumes its open position.
  • the one from the Constant pump 18 pumped pressure medium flow can therefore via the inlet channel 21 and the open connecting valve 36, via the transverse channel 35 and the throttle 37 in the Drain return channel 23 and to tank 25.
  • the one from the Throttle 37 built-up back pressure in the transverse channel 35 is about tapped the second control line 34 and on the spring-loaded end face of the pressure compensator 27 out. But this is the pressure compensator 27 short-circuited and the Constant pump 18 can build up a pressure that the Pressure relief valve 31 set system pressure reached. With the connecting valve 36 is thus the Pressure compensator 27 activated so that the circulation pressure much higher pressure is reached, which up to Level of the set system pressure.
  • the control device 10 operates in this case like a constant pressure system, with the help of of the throttle cross section in the throttle 37 to the tank flowing volume flow is adjustable. It can be done also achieve that over a wide area constant load can be achieved, which is independent of the speed of the constant pump 18, which in turn with the Throttle 37 is adjustable. In the control device 10 can thus with the help of the auxiliary valve 36 a load on the Working hydraulics can be achieved as an additional Function is usable.
  • the second control device 40 also has a first Sensor 44 on the in the return channel 23 of the Connection plate 15 the temperature of the flowing Pressure medium flow and which signals to one electronic control unit 45 reports. Furthermore, in the second pressure medium supply device 41 a second Sensor 46 provided that the speed of the variable displacement pump 42nd determined and dependent signals to the control unit 45 passes on. Furthermore, the electronic Control unit 45 provided a first setpoint input 47, with a desired temperature of the pressure medium flow or whose maximum temperature can be specified. On A second setpoint input 48 shows actual values for the Speed of the variable pump 42 entered. The electronic Control unit 45 determines from the entered target and Actual values is a control deviation and thus controls one Actuator 49, with which the adjustable throttle 37 in the end plate 16 can be actuated.
  • the mode of operation of the second control device 40 with the Variable pump 42 for supplying pressure medium corresponds to Essentially that of the first control device 10 Figure 1.
  • the help of the first Sensor 44 detected temperature of the flowing Pressure medium flow in the return channel 23 and with the Control unit 45 predetermined setpoints for the temperature make an adjustment of the throttle 37, whereby a Regulation of a predetermined temperature value or a Limitation of a maximum temperature becomes possible.
  • the temperature control can also be done with the help of the second one Sensor 46 and the control unit 45 depending on specified speed setpoint a speed control of the Variable pump 42 are made, the Flow cross section at the adjustable throttle point 37 is changed accordingly. If necessary, both can Control types can be combined with each other.

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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)
EP02008997A 2001-04-28 2002-04-23 Circuit de commande hydraulique Expired - Lifetime EP1253327B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10120996A DE10120996A1 (de) 2001-04-28 2001-04-28 Hydraulische Steuereinrichtung
DE10120996 2001-04-28

Publications (2)

Publication Number Publication Date
EP1253327A1 true EP1253327A1 (fr) 2002-10-30
EP1253327B1 EP1253327B1 (fr) 2005-01-12

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EP02008997A Expired - Lifetime EP1253327B1 (fr) 2001-04-28 2002-04-23 Circuit de commande hydraulique

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EP (1) EP1253327B1 (fr)
DE (2) DE10120996A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1449420A1 (fr) * 2003-02-19 2004-08-25 CNH Belgium N.V. Dispositif et procédé pour fournir de la puissance hydraulique à un appareil agricole
EP1471263A1 (fr) * 2003-04-23 2004-10-27 Kobelco Construction Machinery Co., Ltd. Dispositif de vanne hydraulique et montage d'un tel dispositif
WO2005084413A1 (fr) * 2004-03-02 2005-09-15 Bosch Rexroth Ag Systeme d'alimentation
IT201700023749A1 (it) * 2017-03-02 2018-09-02 Walvoil Spa Dispositivo valvolare con messa a scarico attiva in circuiti di tipo load sensing

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10340506B4 (de) * 2003-09-03 2006-05-04 Sauer-Danfoss Aps Ventilanordnung zur Steuerung eines Hydraulikantriebes

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3905654A1 (de) * 1989-02-24 1990-08-30 Bosch Gmbh Robert Hydraulische steuervorrichtung
US5101629A (en) * 1989-02-20 1992-04-07 Hitachi Construction Machinery Co., Ltd. Hydraulic circuit system for working machine
WO2001002736A1 (fr) * 1999-07-02 2001-01-11 Mannesmann Rexroth Ag Dispositif de commande hydraulique destine a alimenter, de preference, plusieurs consommateurs hydrauliques en agent de pression

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5101629A (en) * 1989-02-20 1992-04-07 Hitachi Construction Machinery Co., Ltd. Hydraulic circuit system for working machine
DE3905654A1 (de) * 1989-02-24 1990-08-30 Bosch Gmbh Robert Hydraulische steuervorrichtung
WO2001002736A1 (fr) * 1999-07-02 2001-01-11 Mannesmann Rexroth Ag Dispositif de commande hydraulique destine a alimenter, de preference, plusieurs consommateurs hydrauliques en agent de pression

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1449420A1 (fr) * 2003-02-19 2004-08-25 CNH Belgium N.V. Dispositif et procédé pour fournir de la puissance hydraulique à un appareil agricole
EP1471263A1 (fr) * 2003-04-23 2004-10-27 Kobelco Construction Machinery Co., Ltd. Dispositif de vanne hydraulique et montage d'un tel dispositif
US7131453B2 (en) 2003-04-23 2006-11-07 Kobelco Construction Machinery Co., Ltd. Hydraulic valve device and method for assembling the same
WO2005084413A1 (fr) * 2004-03-02 2005-09-15 Bosch Rexroth Ag Systeme d'alimentation
IT201700023749A1 (it) * 2017-03-02 2018-09-02 Walvoil Spa Dispositivo valvolare con messa a scarico attiva in circuiti di tipo load sensing
EP3369943A1 (fr) * 2017-03-02 2018-09-05 Walvoil S.p.A. Distributeur hydraulique avec dispositif de soupape à décharge active dans des circuits de détection de charge
US11041514B2 (en) 2017-03-02 2021-06-22 Walvoil S.P.A. Hydraulic distributor with valve device with active discharge in load sensing circuits

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DE10120996A1 (de) 2002-10-31
DE50201979D1 (de) 2005-02-17
EP1253327B1 (fr) 2005-01-12

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