JPS6435170A - Hydraulic drive device - Google Patents

Hydraulic drive device

Info

Publication number
JPS6435170A
JPS6435170A JP18773787A JP18773787A JPS6435170A JP S6435170 A JPS6435170 A JP S6435170A JP 18773787 A JP18773787 A JP 18773787A JP 18773787 A JP18773787 A JP 18773787A JP S6435170 A JPS6435170 A JP S6435170A
Authority
JP
Japan
Prior art keywords
main motor
rotational speed
valve
servorelief
variable
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.)
Pending
Application number
JP18773787A
Other languages
Japanese (ja)
Inventor
Kenji Morino
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.)
Komatsu Ltd
Original Assignee
Komatsu 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 Komatsu Ltd filed Critical Komatsu Ltd
Priority to JP18773787A priority Critical patent/JPS6435170A/en
Publication of JPS6435170A publication Critical patent/JPS6435170A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/42—Control of exclusively fluid gearing hydrostatic involving adjustment of a pump or motor with adjustable output or capacity
    • F16H61/421—Motor capacity control by electro-hydraulic control means, e.g. using solenoid valves

Landscapes

  • Control Of Fluid Gearings (AREA)

Abstract

PURPOSE:To prevent the temperature of oil from increasing, by providing a variable servorelief valve on the discharge side of a servopump, and by receiving signals indicating the output rotational speed and inlet pressure of a main motor and a vehicle speed so as to control the relief valve. CONSTITUTION:A variable servorelief valve 30 is disposed on the discharge side of a servopump 22, and a pressure sensor 46 is disposed on the discharge side of a main pump 20. Further, a rotational speed sensor 47 detects the output rotational speed of a main motor 24, and a controller 48 receives both detection signals together with a vehicle speed signal. In this arrangement, when the output rotational speed of the main motor 24 is zero while the inlet pressure of the main motor 24 is high, the controller 48 delivers a control signal to a solenoid 60 which controls the variable servorelief valve so that a high control pressure is obtained corresponding to the tilt moment of the main motor 24.
JP18773787A 1987-07-29 1987-07-29 Hydraulic drive device Pending JPS6435170A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18773787A JPS6435170A (en) 1987-07-29 1987-07-29 Hydraulic drive device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18773787A JPS6435170A (en) 1987-07-29 1987-07-29 Hydraulic drive device

Publications (1)

Publication Number Publication Date
JPS6435170A true JPS6435170A (en) 1989-02-06

Family

ID=16211309

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18773787A Pending JPS6435170A (en) 1987-07-29 1987-07-29 Hydraulic drive device

Country Status (1)

Country Link
JP (1) JPS6435170A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021181832A (en) * 2019-03-20 2021-11-25 株式会社クボタ Traveling system hydraulic circuit and traveling control method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021181832A (en) * 2019-03-20 2021-11-25 株式会社クボタ Traveling system hydraulic circuit and traveling control method

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