JPS6479401A - Hydraulic driving device for load sensing control - Google Patents

Hydraulic driving device for load sensing control

Info

Publication number
JPS6479401A
JPS6479401A JP23647287A JP23647287A JPS6479401A JP S6479401 A JPS6479401 A JP S6479401A JP 23647287 A JP23647287 A JP 23647287A JP 23647287 A JP23647287 A JP 23647287A JP S6479401 A JPS6479401 A JP S6479401A
Authority
JP
Japan
Prior art keywords
pilot
valve
room
pressure
line
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
JP23647287A
Other languages
Japanese (ja)
Other versions
JP2542005B2 (en
Inventor
Eiki Izumi
Masahiko Shimotori
Yusaku Nozawa
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.)
Hitachi Construction Machinery Co Ltd
Original Assignee
Hitachi Construction Machinery Co 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 Hitachi Construction Machinery Co Ltd filed Critical Hitachi Construction Machinery Co Ltd
Priority to JP62236472A priority Critical patent/JP2542005B2/en
Publication of JPS6479401A publication Critical patent/JPS6479401A/en
Application granted granted Critical
Publication of JP2542005B2 publication Critical patent/JP2542005B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Operation Control Of Excavators (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

PURPOSE:To perform the non-saturation control of a discharge flow amount by introducing the control pressure at a poppet valve into one pilot room of a pressure compensation valve, and the maximum load pressure at an actuator and the inlet pressure at a pilot valve into the other pilot room. CONSTITUTION:A pressure compensation valve 8a is connected to a pilot line 17a in the position between the pilot port 15a of a poppet valve 11a and a pilot valve 12a. This pressure compensation valve 8a has the first pilot rooms 31a and the second pilot room 32a, which oppose to each other, on its both sides. One pilot room 36a of the first pilot rooms 31a is connected to the pilot line 17a at the inlet side of the pilot valve 12a, and the other pilot room 37a is connected to the maximum load pressure line 29 of an actuator. And the second pilot room 32a is connected to the pilot line 17a.
JP62236472A 1987-09-21 1987-09-21 Road sensing control hydraulic drive Expired - Fee Related JP2542005B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62236472A JP2542005B2 (en) 1987-09-21 1987-09-21 Road sensing control hydraulic drive

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62236472A JP2542005B2 (en) 1987-09-21 1987-09-21 Road sensing control hydraulic drive

Publications (2)

Publication Number Publication Date
JPS6479401A true JPS6479401A (en) 1989-03-24
JP2542005B2 JP2542005B2 (en) 1996-10-09

Family

ID=17001245

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62236472A Expired - Fee Related JP2542005B2 (en) 1987-09-21 1987-09-21 Road sensing control hydraulic drive

Country Status (1)

Country Link
JP (1) JP2542005B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991002902A1 (en) * 1989-08-16 1991-03-07 Hitachi Construction Machinery Co., Ltd. Valve device and hydraulic circuit device
JP2005315350A (en) * 2004-04-28 2005-11-10 Hitachi Constr Mach Co Ltd Control valve device and pressure circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991002902A1 (en) * 1989-08-16 1991-03-07 Hitachi Construction Machinery Co., Ltd. Valve device and hydraulic circuit device
JP2005315350A (en) * 2004-04-28 2005-11-10 Hitachi Constr Mach Co Ltd Control valve device and pressure circuit

Also Published As

Publication number Publication date
JP2542005B2 (en) 1996-10-09

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees