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 circuit

Info

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
Application number
JP11337379A
Other languages
Japanese (ja)
Other versions
JPS6224643B2 (en
Inventor
Kenji Masuda
Masaaki Suhara
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.)
Daikin Industries Ltd
Original Assignee
Daikin Industries Ltd
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 Daikin Industries Ltd filed Critical Daikin Industries Ltd
Priority to JP11337379A priority Critical patent/JPS5639311A/en
Publication of JPS5639311A publication Critical patent/JPS5639311A/en
Publication of JPS6224643B2 publication Critical patent/JPS6224643B2/ja
Granted legal-status Critical Current

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
JP11337379A 1979-09-03 1979-09-03 Two stage type electromagnetic proportional throttle change-over valve with reducing pilot valve having control circuit Granted JPS5639311A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49133780A (en) * 1973-04-29 1974-12-23

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49133780A (en) * 1973-04-29 1974-12-23

Cited By (13)

* Cited by examiner, † Cited by third party
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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