EP0376023A3 - Electrohydraulic proportional valve - Google Patents

Electrohydraulic proportional valve Download PDF

Info

Publication number
EP0376023A3
EP0376023A3 EP19890122724 EP89122724A EP0376023A3 EP 0376023 A3 EP0376023 A3 EP 0376023A3 EP 19890122724 EP19890122724 EP 19890122724 EP 89122724 A EP89122724 A EP 89122724A EP 0376023 A3 EP0376023 A3 EP 0376023A3
Authority
EP
European Patent Office
Prior art keywords
valve
spool
control
main control
pilot
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
EP19890122724
Other languages
German (de)
French (fr)
Other versions
EP0376023B1 (en
EP0376023A2 (en
Inventor
Eckard Schuttenberg
Berthold Dipl.-Ing. Pfuhl (Fh)
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
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0376023A2 publication Critical patent/EP0376023A2/en
Publication of EP0376023A3 publication Critical patent/EP0376023A3/en
Application granted granted Critical
Publication of EP0376023B1 publication Critical patent/EP0376023B1/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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
    • F15B13/043—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with electrically-controlled pilot 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
    • F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
    • 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
    • F15B2211/355—Pilot pressure 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/635—Circuits providing pilot pressure to pilot pressure-controlled fluid circuit elements
    • F15B2211/6355—Circuits providing pilot pressure to pilot pressure-controlled fluid circuit elements having valve 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
    • F15B2211/67—Methods for controlling pilot pressure

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Servomotors (AREA)
  • Multiple-Way Valves (AREA)

Abstract

Es wird ein elektrohydraulisches Proportionalwegeventil (10) in zweistufiger Bauweise vorgeschlagen, bei dem in den Vorsteuerkreis (42) eingreifende Steuermittel den Druckaufbau in einem Steuerraum (27) am Hauptsteuerschieber (17) und damit dessen Auslenkung be­ einflussen, um vorgegebene Sicherheitsanforderungen zu erfüllen. Ein bei einem Standardventil vorgesehener Hilfsanschluß (C) ist über ei­ ne Längsnut (47) am Hauptsteuerschieber (17) mit dem vom Vorsteuer­ ventil (13) beaufschlagbaren Steuerraum (27) verbunden und über ein zusätzliches Schaltventil (14) zum Tank entlastbar. Selbst bei re­ gelndem Vorsteuerventil (13) kann damit eine ungewollte Auslenkung des Hauptsteuerschiebers (17) in bestimmte Richtungen verhindert werden, so daß nur gewünschte Druckmittelverbindungen vom Haupt­ steuerventil (12) herstellbar sind. An electro-hydraulic proportional directional control valve (10) in two-stage construction proposed, in which in the pilot circuit (42) engaging control means the pressure build-up in a control room (27) on the main control spool (17) and thus its deflection influence to meet specified security requirements. A provided with a standard valve auxiliary connection (C) is via ei ne longitudinal groove (47) on the main spool (17) with that of the pilot valve (13) acted upon control chamber (27) and connected via a additional switching valve (14) can be relieved to the tank. Even with right Geleldem pilot valve (13) can thus an unwanted deflection the main control spool (17) prevented in certain directions be, so that only desired pressure medium connections from the main Control valve (12) can be produced.

EP89122724A 1988-12-30 1989-12-09 Electrohydraulic proportional valve Expired - Lifetime EP0376023B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3844336A DE3844336A1 (en) 1988-12-30 1988-12-30 ELECTROHYDRAULIC PORPORTIONAL WAY VALVE
DE3844336 1988-12-30

Publications (3)

Publication Number Publication Date
EP0376023A2 EP0376023A2 (en) 1990-07-04
EP0376023A3 true EP0376023A3 (en) 1991-04-17
EP0376023B1 EP0376023B1 (en) 1994-03-09

Family

ID=6370536

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89122724A Expired - Lifetime EP0376023B1 (en) 1988-12-30 1989-12-09 Electrohydraulic proportional valve

Country Status (2)

Country Link
EP (1) EP0376023B1 (en)
DE (2) DE3844336A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0471884B1 (en) * 1990-08-24 1996-02-21 MOOG GmbH Electrohydraulic servovalve
DE4446144A1 (en) * 1994-12-23 1996-06-27 Bosch Gmbh Robert Hydraulic control in monoblock design from at least two interlinked electromagnetically actuated proportional directional control valve elements
DE102023200319A1 (en) 2023-01-17 2024-07-18 Robert Bosch Gesellschaft mit beschränkter Haftung Fan drive device with proportional valve

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2436900A1 (en) * 1978-09-20 1980-04-18 Bosch Gmbh Robert ELECTROHYDRAULIC DISTRIBUTION VALVE

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2436900A1 (en) * 1978-09-20 1980-04-18 Bosch Gmbh Robert ELECTROHYDRAULIC DISTRIBUTION VALVE

Also Published As

Publication number Publication date
DE58907181D1 (en) 1994-04-14
EP0376023B1 (en) 1994-03-09
EP0376023A2 (en) 1990-07-04
DE3844336A1 (en) 1990-07-05

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