JPS5639311A - Two stage type electromagnetic proportional throttle change-over valve with reducing pilot valve having control circuit - Google Patents
Two stage type electromagnetic proportional throttle change-over valve with reducing pilot valve having control circuitInfo
- Publication number
- JPS5639311A JPS5639311A JP11337379A JP11337379A JPS5639311A JP S5639311 A JPS5639311 A JP S5639311A JP 11337379 A JP11337379 A JP 11337379A JP 11337379 A JP11337379 A JP 11337379A JP S5639311 A JPS5639311 A JP S5639311A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- pilot valve
- main spool
- proportional throttle
- stage type
- 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
Landscapes
- Servomotors (AREA)
- Magnetically Actuated Valves (AREA)
- Feedback Control In General (AREA)
Abstract
PURPOSE: To improve the accuracy of the conrol of a main spool by a method wherein a reducing type electromagnetic pilot valve functioning in response to applying currents and the two stage type proportional throttle valve controlled by means of the said pilot valve are mounted, and the applying currents are controlled in response to the position of the proportional throttle valve.
CONSTITUTION: The electromagnetic proportional throttle change-over valve 26 is provided with the reducing type electromagnetic pilot valve 3 working in response to the applying currents of solenoids 3a, 3b and the two stage type proportional throttle valve 6 operating the main spool 7 by the secondary pressure controlled by means of the said pilot valve. A proportional integration circuit 21 operates and integrates the positional signal X of the main spool and command signals e/s. A feed forward circuit 22 prevents the lowering of the transition response capacity of the proportional integration circuit 21. A gain change-over circuit 24 compensates a nonlinear property of a throttle opening characteristic of the main spool 7, and greatly improves the static accuracy of the main spool.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11337379A JPS5639311A (en) | 1979-09-03 | 1979-09-03 | Two stage type electromagnetic proportional throttle change-over valve with reducing pilot valve having control circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11337379A JPS5639311A (en) | 1979-09-03 | 1979-09-03 | Two stage type electromagnetic proportional throttle change-over valve with reducing pilot valve having control circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5639311A true JPS5639311A (en) | 1981-04-15 |
JPS6224643B2 JPS6224643B2 (en) | 1987-05-29 |
Family
ID=14610636
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11337379A Granted JPS5639311A (en) | 1979-09-03 | 1979-09-03 | Two stage type electromagnetic proportional throttle change-over valve with reducing pilot valve having control circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5639311A (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58678A (en) * | 1981-06-23 | 1983-01-05 | Matsushita Electric Ind Co Ltd | Solenoid proportional valve driving circuit |
JPS5872702A (en) * | 1981-10-10 | 1983-04-30 | ロ−ベルト・ボツシユ・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング | Pilot operating device adjusting pressure medium flow in relation to load in proportional to electric input signal |
JPS58206561A (en) * | 1982-05-18 | 1983-12-01 | ザ・ユニバ−シテイ・オブ・フロリダ | Drug supplying compound idiosyncratic to brain |
US4422474A (en) * | 1981-09-14 | 1983-12-27 | Ford Motor Company | Electro-hydraulic remote valve |
JPS59500914A (en) * | 1983-01-27 | 1984-05-24 | ユニバ−シテイ・オブ・フロリダ | Delivery of specific drugs to the brain |
JPS6057073A (en) * | 1983-09-06 | 1985-04-02 | Shoketsu Kinzoku Kogyo Co Ltd | Fluid control system |
JPH01273117A (en) * | 1988-03-25 | 1989-11-01 | Robert Bosch Gmbh | Adjuster for 3-stage valve |
US6164415A (en) * | 1997-03-21 | 2000-12-26 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Hydraulic control apparatus for industrial vehicles |
JP2011530099A (en) * | 2008-06-11 | 2011-12-15 | イートン コーポレーション | Electro-hydraulic valve for automatic tuning |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS49133780A (en) * | 1973-04-29 | 1974-12-23 |
-
1979
- 1979-09-03 JP JP11337379A patent/JPS5639311A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS49133780A (en) * | 1973-04-29 | 1974-12-23 |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58678A (en) * | 1981-06-23 | 1983-01-05 | Matsushita Electric Ind Co Ltd | Solenoid proportional valve driving circuit |
JPH0243070B2 (en) * | 1981-06-23 | 1990-09-27 | ||
US4422474A (en) * | 1981-09-14 | 1983-12-27 | Ford Motor Company | Electro-hydraulic remote valve |
JPH0517402B2 (en) * | 1981-10-10 | 1993-03-09 | Bosch Gmbh Robert | |
JPS5872702A (en) * | 1981-10-10 | 1983-04-30 | ロ−ベルト・ボツシユ・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング | Pilot operating device adjusting pressure medium flow in relation to load in proportional to electric input signal |
JPS58206561A (en) * | 1982-05-18 | 1983-12-01 | ザ・ユニバ−シテイ・オブ・フロリダ | Drug supplying compound idiosyncratic to brain |
JPS59500914A (en) * | 1983-01-27 | 1984-05-24 | ユニバ−シテイ・オブ・フロリダ | Delivery of specific drugs to the brain |
JPS6057073A (en) * | 1983-09-06 | 1985-04-02 | Shoketsu Kinzoku Kogyo Co Ltd | Fluid control system |
JPH0313466B2 (en) * | 1983-09-06 | 1991-02-22 | Smc Corp | |
JPH01273117A (en) * | 1988-03-25 | 1989-11-01 | Robert Bosch Gmbh | Adjuster for 3-stage valve |
US6164415A (en) * | 1997-03-21 | 2000-12-26 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Hydraulic control apparatus for industrial vehicles |
JP2011530099A (en) * | 2008-06-11 | 2011-12-15 | イートン コーポレーション | Electro-hydraulic valve for automatic tuning |
US9037272B2 (en) | 2008-06-11 | 2015-05-19 | Eaton Corporation | Auto-tuning electro-hydraulic valve |
Also Published As
Publication number | Publication date |
---|---|
JPS6224643B2 (en) | 1987-05-29 |
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