EP0376023A3 - Electrohydraulic proportional valve - Google Patents
Electrohydraulic proportional valve Download PDFInfo
- 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
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.
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2436900A1 (en) * | 1978-09-20 | 1980-04-18 | Bosch Gmbh Robert | ELECTROHYDRAULIC DISTRIBUTION VALVE |
-
1988
- 1988-12-30 DE DE3844336A patent/DE3844336A1/en not_active Withdrawn
-
1989
- 1989-12-09 DE DE89122724T patent/DE58907181D1/en not_active Expired - Fee Related
- 1989-12-09 EP EP89122724A patent/EP0376023B1/en not_active Expired - Lifetime
Patent Citations (1)
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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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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17P | Request for examination filed |
Effective date: 19911008 |
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RAP3 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: ROBERT BOSCH GMBH |
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17Q | First examination report despatched |
Effective date: 19920807 |
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REF | Corresponds to: |
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26N | No opposition filed | ||
GBPC | Gb: european patent ceased through non-payment of renewal fee |
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Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 20051209 |