JPS54108002A - Input power controlling system for hydraulic pump - Google Patents

Input power controlling system for hydraulic pump

Info

Publication number
JPS54108002A
JPS54108002A JP1417478A JP1417478A JPS54108002A JP S54108002 A JPS54108002 A JP S54108002A JP 1417478 A JP1417478 A JP 1417478A JP 1417478 A JP1417478 A JP 1417478A JP S54108002 A JPS54108002 A JP S54108002A
Authority
JP
Japan
Prior art keywords
piston
follow
hydraulic pump
pump
input power
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
JP1417478A
Other languages
Japanese (ja)
Other versions
JPS6131319B2 (en
Inventor
Sei Inanaga
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.)
Ebara Corp
Original Assignee
Ebara Corp
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 Ebara Corp filed Critical Ebara Corp
Priority to JP1417478A priority Critical patent/JPS54108002A/en
Publication of JPS54108002A publication Critical patent/JPS54108002A/en
Publication of JPS6131319B2 publication Critical patent/JPS6131319B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Control Of Positive-Displacement Pumps (AREA)

Abstract

PURPOSE: To devise to control the input power in a fixed level by driving a follow- up piston according to the discharge pressure of a hydraulic pump for controlling the inclining angle of a pump casing.
CONSTITUTION: When the discharge pressure of a constant-capacity hydraulic pump 1C is in a constant level, a follow-up piston 12 is driven to a proper position by discharge pressures of variable capacity hydraulic pumps 1A and 1B acting to pistons 13A and 13B as being balanced with springs 15A, 15B, 15C, 16, and 17. At this stage, since these spring powers are properly chosen, the relation between the amount and the pressure of the pump discharge shown a hyperbolic curve, that is, a characteristic curve with a constant power. A pilot piston 23 is shifted by the follow-up piston 12 for changing over the connection of flow passages, and consequently, the inclining angle of a pump casing 26 is changed by a follow-up piston 22.
COPYRIGHT: (C)1979,JPO&Japio
JP1417478A 1978-02-13 1978-02-13 Input power controlling system for hydraulic pump Granted JPS54108002A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1417478A JPS54108002A (en) 1978-02-13 1978-02-13 Input power controlling system for hydraulic pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1417478A JPS54108002A (en) 1978-02-13 1978-02-13 Input power controlling system for hydraulic pump

Publications (2)

Publication Number Publication Date
JPS54108002A true JPS54108002A (en) 1979-08-24
JPS6131319B2 JPS6131319B2 (en) 1986-07-19

Family

ID=11853770

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1417478A Granted JPS54108002A (en) 1978-02-13 1978-02-13 Input power controlling system for hydraulic pump

Country Status (1)

Country Link
JP (1) JPS54108002A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4599050A (en) * 1984-02-08 1986-07-08 Kabushiki Kaisha Komatsu Seisakusho Device for controlling displacement of variable displacement hydraulic pump
US4613286A (en) * 1984-12-31 1986-09-23 Kabushiki Kaisha Komatsu Seisakusho Constant torque control system for a variable displacement pump or pumps
JPH0443876A (en) * 1990-06-08 1992-02-13 Hanix Ind Co Ltd Output controller in hydraulic device of construction machine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4599050A (en) * 1984-02-08 1986-07-08 Kabushiki Kaisha Komatsu Seisakusho Device for controlling displacement of variable displacement hydraulic pump
US4613286A (en) * 1984-12-31 1986-09-23 Kabushiki Kaisha Komatsu Seisakusho Constant torque control system for a variable displacement pump or pumps
JPH0443876A (en) * 1990-06-08 1992-02-13 Hanix Ind Co Ltd Output controller in hydraulic device of construction machine

Also Published As

Publication number Publication date
JPS6131319B2 (en) 1986-07-19

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