JPS5632087A - Input torque controlling system for variable displacement pump - Google Patents

Input torque controlling system for variable displacement pump

Info

Publication number
JPS5632087A
JPS5632087A JP10779879A JP10779879A JPS5632087A JP S5632087 A JPS5632087 A JP S5632087A JP 10779879 A JP10779879 A JP 10779879A JP 10779879 A JP10779879 A JP 10779879A JP S5632087 A JPS5632087 A JP S5632087A
Authority
JP
Japan
Prior art keywords
engine
input torque
lowered
pump
increased
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
JP10779879A
Other languages
Japanese (ja)
Inventor
Tadashi Nishimura
Hiroshi Fujikawa
Tatsushi Hatano
Sakae Sugiuchi
Shinichi Iwata
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.)
NIPPON JIYOSETSUKI SEISAKUSHO KK
Kawasaki Heavy Industries Ltd
Original Assignee
NIPPON JIYOSETSUKI SEISAKUSHO KK
Kawasaki Heavy Industries 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 NIPPON JIYOSETSUKI SEISAKUSHO KK, Kawasaki Heavy Industries Ltd filed Critical NIPPON JIYOSETSUKI SEISAKUSHO KK
Priority to JP10779879A priority Critical patent/JPS5632087A/en
Publication of JPS5632087A publication Critical patent/JPS5632087A/en
Pending legal-status Critical Current

Links

Landscapes

  • Motor Power Transmission Devices (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

PURPOSE: To prevent overloading of engine and to make an efficient use of engine output, by detecting the load variation in a working system through variation of hydraulic pressure to a regulator, and thereby controlling the pump input torque.
CONSTITUTION: When on-off valve 18 is opened and a working system is set into operation while in operation of a driving system constituted by a crossover relief valve 14 connected to a hydraulic motor 13 via main conduits 11, 12 etc., the speed of engine 1 is lowered since the load acted to engine 1 is increased and the amount of hydraulic fluid discharged from a pilot pump 7 is decreased, so that pressure fluid is passed through a variable restriction 17. Resultantly, a pilot pressure Pa with its level being lowered is led to a regulator 15, so that the input torque of a pump 1 is lowered. On the other hand, in case of composite operation of the engine, engine speed is increased when the work load is lowered, so that pilot pressure Pa is raised and the pump input torque is increased. Thus, it is enabled to prevent overloading of engine and to make an efficient use of engine output.
COPYRIGHT: (C)1981,JPO&Japio
JP10779879A 1979-08-23 1979-08-23 Input torque controlling system for variable displacement pump Pending JPS5632087A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10779879A JPS5632087A (en) 1979-08-23 1979-08-23 Input torque controlling system for variable displacement pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10779879A JPS5632087A (en) 1979-08-23 1979-08-23 Input torque controlling system for variable displacement pump

Publications (1)

Publication Number Publication Date
JPS5632087A true JPS5632087A (en) 1981-04-01

Family

ID=14468293

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10779879A Pending JPS5632087A (en) 1979-08-23 1979-08-23 Input torque controlling system for variable displacement pump

Country Status (1)

Country Link
JP (1) JPS5632087A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5770978A (en) * 1980-10-20 1982-05-01 Daikin Ind Ltd Variable displacement hydraulic pump

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52105304A (en) * 1976-01-30 1977-09-03 Linde Ag Controller for pumping apparatus consisting of at least two units of pump

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52105304A (en) * 1976-01-30 1977-09-03 Linde Ag Controller for pumping apparatus consisting of at least two units of pump

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5770978A (en) * 1980-10-20 1982-05-01 Daikin Ind Ltd Variable displacement hydraulic pump

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