JPS5797089A - Controller for variable volumetric hydraulic pump - Google Patents

Controller for variable volumetric hydraulic pump

Info

Publication number
JPS5797089A
JPS5797089A JP55170887A JP17088780A JPS5797089A JP S5797089 A JPS5797089 A JP S5797089A JP 55170887 A JP55170887 A JP 55170887A JP 17088780 A JP17088780 A JP 17088780A JP S5797089 A JPS5797089 A JP S5797089A
Authority
JP
Japan
Prior art keywords
hydraulic pump
controlled
prime mover
variable volumetric
discharge pressure
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
JP55170887A
Other languages
Japanese (ja)
Other versions
JPH0125906B2 (en
Inventor
Yasuharu Goto
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 JP55170887A priority Critical patent/JPS5797089A/en
Publication of JPS5797089A publication Critical patent/JPS5797089A/en
Publication of JPH0125906B2 publication Critical patent/JPH0125906B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To enable controlling thrust capacity of a variable volumetric hydraulic pump which is simple in the structure and made into small compaction in such a way that a spring is provided at one end of a control member together with the working of discharge pressure to be produced by another hydraulic pump through its own discharge pressure and a pressure reducing valve.
CONSTITUTION: When discharge pressure Pda of 3a grows more than the established pressure Po out of variable volumetric hydraulic pumps 3a, 3b which are driven by one prime mover 1, since a piston 16a moves to the left against a spring 17a, angle of rake for the hydraulic pump 3a is decreased, discharge rate Q is reduced, input torque T of the hydraulic pump 3a is controlled in such a way that is may be the value To in 1/2 of the maximum output torque of the prime mover 1. Further, when input torque of the partner hydraulic pump 3b stands at less than To, the input torque of the hydraulic pump 3a can be increased until the total value of the input torques of the both pumps 3a, 3b becomes To. Thus, thrust capacity of the hydraulic pump can be controlled by means of a simple and small compaction of device is controlled, and effective utilization of the output torque of the prime mover 1.
COPYRIGHT: (C)1982,JPO&Japio
JP55170887A 1980-12-05 1980-12-05 Controller for variable volumetric hydraulic pump Granted JPS5797089A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55170887A JPS5797089A (en) 1980-12-05 1980-12-05 Controller for variable volumetric hydraulic pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55170887A JPS5797089A (en) 1980-12-05 1980-12-05 Controller for variable volumetric hydraulic pump

Publications (2)

Publication Number Publication Date
JPS5797089A true JPS5797089A (en) 1982-06-16
JPH0125906B2 JPH0125906B2 (en) 1989-05-19

Family

ID=15913153

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55170887A Granted JPS5797089A (en) 1980-12-05 1980-12-05 Controller for variable volumetric hydraulic pump

Country Status (1)

Country Link
JP (1) JPS5797089A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4498847A (en) * 1982-06-29 1985-02-12 Kabushiki Kaisha Komatsu Seisakusho Control system for variable displacement hydraulic pumps
JPS60198387A (en) * 1984-03-21 1985-10-07 Hitachi Constr Mach Co Ltd Inlet control device for hydraulic pump
US8777341B2 (en) 2009-04-16 2014-07-15 Electrolux Do Brasil S.A. Sliding shelves for refrigerators and freezers

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5416701A (en) * 1977-07-07 1979-02-07 Kobe Steel Ltd Control circuit of variable capacity hydraulic pump for hydraulic shovel

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5416701A (en) * 1977-07-07 1979-02-07 Kobe Steel Ltd Control circuit of variable capacity hydraulic pump for hydraulic shovel

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4498847A (en) * 1982-06-29 1985-02-12 Kabushiki Kaisha Komatsu Seisakusho Control system for variable displacement hydraulic pumps
JPS60198387A (en) * 1984-03-21 1985-10-07 Hitachi Constr Mach Co Ltd Inlet control device for hydraulic pump
JPH0451671B2 (en) * 1984-03-21 1992-08-19 Hitachi Construction Machinery
US8777341B2 (en) 2009-04-16 2014-07-15 Electrolux Do Brasil S.A. Sliding shelves for refrigerators and freezers

Also Published As

Publication number Publication date
JPH0125906B2 (en) 1989-05-19

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