JPS57178043A - Hydraulic circuit of construction equipment - Google Patents

Hydraulic circuit of construction equipment

Info

Publication number
JPS57178043A
JPS57178043A JP6146381A JP6146381A JPS57178043A JP S57178043 A JPS57178043 A JP S57178043A JP 6146381 A JP6146381 A JP 6146381A JP 6146381 A JP6146381 A JP 6146381A JP S57178043 A JPS57178043 A JP S57178043A
Authority
JP
Japan
Prior art keywords
pilot
valve
valves
opening
controlled
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
JP6146381A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0257171B2 (enrdf_load_stackoverflow
Inventor
Kunihiko Yoshida
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 JP6146381A priority Critical patent/JPS57178043A/ja
Publication of JPS57178043A publication Critical patent/JPS57178043A/ja
Publication of JPH0257171B2 publication Critical patent/JPH0257171B2/ja
Granted legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • E02F9/2232—Control of flow rate; Load sensing arrangements using one or more variable displacement pumps
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2278—Hydraulic circuits
    • E02F9/2296—Systems with a variable displacement pump

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Operation Control Of Excavators (AREA)
JP6146381A 1981-04-24 1981-04-24 Hydraulic circuit of construction equipment Granted JPS57178043A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6146381A JPS57178043A (en) 1981-04-24 1981-04-24 Hydraulic circuit of construction equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6146381A JPS57178043A (en) 1981-04-24 1981-04-24 Hydraulic circuit of construction equipment

Publications (2)

Publication Number Publication Date
JPS57178043A true JPS57178043A (en) 1982-11-02
JPH0257171B2 JPH0257171B2 (enrdf_load_stackoverflow) 1990-12-04

Family

ID=13171749

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6146381A Granted JPS57178043A (en) 1981-04-24 1981-04-24 Hydraulic circuit of construction equipment

Country Status (1)

Country Link
JP (1) JPS57178043A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
JPH0257171B2 (enrdf_load_stackoverflow) 1990-12-04

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