JPS57173534A - Engine driven oil hydraulic power source device - Google Patents

Engine driven oil hydraulic power source device

Info

Publication number
JPS57173534A
JPS57173534A JP56058624A JP5862481A JPS57173534A JP S57173534 A JPS57173534 A JP S57173534A JP 56058624 A JP56058624 A JP 56058624A JP 5862481 A JP5862481 A JP 5862481A JP S57173534 A JPS57173534 A JP S57173534A
Authority
JP
Japan
Prior art keywords
engine
lever
cylinder
governor
oil hydraulic
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
JP56058624A
Other languages
Japanese (ja)
Other versions
JPH0121332B2 (en
Inventor
Takashi Kanai
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 JP56058624A priority Critical patent/JPS57173534A/en
Publication of JPS57173534A publication Critical patent/JPS57173534A/en
Publication of JPH0121332B2 publication Critical patent/JPH0121332B2/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)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

PURPOSE:To eliminate the necessity for a conventional servo valve in a device and perform its cost down, by guiding delivery pressure of a variable displacement oil hydraulic pump, driven with an engine, to a cylinder, provided for driving a fuel lever, displacing said cylinder and controlling a governor of the engine. CONSTITUTION:When a fuel lever 4 is placed to a zero position 12 of control amount, a piston 8a is placed to the extremely right position in a cylinder 7, to press a compression spring 9 to its maximum compressed state, control a governor through a cable 5a and operate an engine 1 to its minimum speed. When the control lever 4 is placed to a position 13, movement of the lever 4 is not transmitted to the governor because of existence of the spring 9 for a variable displacement oil hydraulic pump 2 at no load operation, and the engine 1 is maintained still in its minimum speed. On the contrary, if the pump 2 is loaded, pressure is applied to a chamber 16 through a pilot line 11, then the cylinder 7 is moved leftward, and the governor increases engine speed through the cable 5a correspondingly to the displacement of the lever 4.
JP56058624A 1981-04-20 1981-04-20 Engine driven oil hydraulic power source device Granted JPS57173534A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56058624A JPS57173534A (en) 1981-04-20 1981-04-20 Engine driven oil hydraulic power source device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56058624A JPS57173534A (en) 1981-04-20 1981-04-20 Engine driven oil hydraulic power source device

Publications (2)

Publication Number Publication Date
JPS57173534A true JPS57173534A (en) 1982-10-25
JPH0121332B2 JPH0121332B2 (en) 1989-04-20

Family

ID=13089725

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56058624A Granted JPS57173534A (en) 1981-04-20 1981-04-20 Engine driven oil hydraulic power source device

Country Status (1)

Country Link
JP (1) JPS57173534A (en)

Cited By (1)

* 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

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS572237U (en) * 1980-06-04 1982-01-07
JPS5713849U (en) * 1980-06-30 1982-01-23
JPS5722920A (en) * 1980-07-18 1982-02-06 Japan Steel Works Ltd:The Engine control device of construction machine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5291603A (en) * 1976-01-28 1977-08-02 Oki Kaiyo Electronics Kk Electronic switching system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS572237U (en) * 1980-06-04 1982-01-07
JPS5713849U (en) * 1980-06-30 1982-01-23
JPS5722920A (en) * 1980-07-18 1982-02-06 Japan Steel Works Ltd:The Engine control device of construction machine

Cited By (2)

* 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

Also Published As

Publication number Publication date
JPH0121332B2 (en) 1989-04-20

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