JPS57163701A - Controller of hydraulic unit - Google Patents

Controller of hydraulic unit

Info

Publication number
JPS57163701A
JPS57163701A JP7416081A JP7416081A JPS57163701A JP S57163701 A JPS57163701 A JP S57163701A JP 7416081 A JP7416081 A JP 7416081A JP 7416081 A JP7416081 A JP 7416081A JP S57163701 A JPS57163701 A JP S57163701A
Authority
JP
Japan
Prior art keywords
engine
flow rate
diameter part
pressure
rate feedback
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
JP7416081A
Other languages
Japanese (ja)
Other versions
JPS6257842B2 (en
Inventor
Katsuro Abe
Shuichi Ichiyama
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 JP7416081A priority Critical patent/JPS57163701A/en
Publication of JPS57163701A publication Critical patent/JPS57163701A/en
Publication of JPS6257842B2 publication Critical patent/JPS6257842B2/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
    • E02F9/2246—Control of prime movers, e.g. depending on the hydraulic load of work tools
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
    • F02D29/04—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving pumps

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

PURPOSE:To let a consumed horsepower get near a required horsepower by detecting a control signal for a directional control valve and a discharged pressure of a hydraulic pump and feeding back them to control a revolution speed of an engine. CONSTITUTION:Controlling of a revolution number of an engine is made by shifting a throttling lever from a position 9 to 9' to operate a governor 12 of the engine via links 10, 11. A cylinder 13 which contains a piston 17 made up of a large diameter part 17a and a small diameter part 17b is linked to a link mechanism, which performs a flow rate feedback by transferring a pressure Pp correspondent to a controlled level of a directional control valve into a left chamber of the large diameter part 17a, and a flow rate feedback by transferring a discharged pressure Pm of a hydraulic pump into a left chamber of the small diameter part 17b. A problem that by the flow rate feedback only a flow rate can not be adjusted to be proportional to rpm. of the engine due to a fluctuation of pressure has been eliminated, thus an overload of the engine under high pressures is prevented
JP7416081A 1981-05-19 1981-05-19 Controller of hydraulic unit Granted JPS57163701A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7416081A JPS57163701A (en) 1981-05-19 1981-05-19 Controller of hydraulic unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7416081A JPS57163701A (en) 1981-05-19 1981-05-19 Controller of hydraulic unit

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP50129037A Division JPS6011243B2 (en) 1975-10-27 1975-10-27 Control device installed in Aburosho unit

Publications (2)

Publication Number Publication Date
JPS57163701A true JPS57163701A (en) 1982-10-08
JPS6257842B2 JPS6257842B2 (en) 1987-12-03

Family

ID=13539120

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7416081A Granted JPS57163701A (en) 1981-05-19 1981-05-19 Controller of hydraulic unit

Country Status (1)

Country Link
JP (1) JPS57163701A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61200343A (en) * 1985-02-28 1986-09-04 Komatsu Ltd Control method of engine for driving oil hydraulic pump
JPS61200344A (en) * 1985-02-28 1986-09-04 Komatsu Ltd Output control method for engine driven variable displacement oil hydraulic pump
JPS61502114A (en) * 1984-05-14 1986-09-25 キヤタピラ−　トラクタ−　コムパニ− Hydrostatic vehicle control device
CN110259749A (en) * 2019-06-29 2019-09-20 潍柴动力股份有限公司 A kind of power control valve block, hydraulic pump module and engineering machinery

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61502114A (en) * 1984-05-14 1986-09-25 キヤタピラ−　トラクタ−　コムパニ− Hydrostatic vehicle control device
JPH0568387B2 (en) * 1984-05-14 1993-09-28 Caterpillar Inc
JPS61200343A (en) * 1985-02-28 1986-09-04 Komatsu Ltd Control method of engine for driving oil hydraulic pump
JPS61200344A (en) * 1985-02-28 1986-09-04 Komatsu Ltd Output control method for engine driven variable displacement oil hydraulic pump
CN110259749A (en) * 2019-06-29 2019-09-20 潍柴动力股份有限公司 A kind of power control valve block, hydraulic pump module and engineering machinery

Also Published As

Publication number Publication date
JPS6257842B2 (en) 1987-12-03

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