JPS57116183A - Input restriction unit for hydraulic pump - Google Patents

Input restriction unit for hydraulic pump

Info

Publication number
JPS57116183A
JPS57116183A JP56000766A JP76681A JPS57116183A JP S57116183 A JPS57116183 A JP S57116183A JP 56000766 A JP56000766 A JP 56000766A JP 76681 A JP76681 A JP 76681A JP S57116183 A JPS57116183 A JP S57116183A
Authority
JP
Japan
Prior art keywords
pump
signal
tilting angle
input torque
rack displacement
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
JP56000766A
Other languages
Japanese (ja)
Other versions
JPH0240873B2 (en
Inventor
Eiki Izumi
Yukio Aoyanagi
Hiroshi Watanabe
Kazuo Honma
Yoshio Nakajima
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 JP56000766A priority Critical patent/JPS57116183A/en
Publication of JPS57116183A publication Critical patent/JPS57116183A/en
Publication of JPH0240873B2 publication Critical patent/JPH0240873B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

PURPOSE: To restrict input torque by a method wherein rack displacement of a pump is detected and the regulator of the pump is controlled by the signal of target tilting angle required in increase and decrease of the fixed value at the time of reaching the value more than the predetermined value.
CONSTITUTION: A signal of the target tilting angle is obtained from a pump control coefficient signal and a signal of operational amount of the operation lever of pump 14 as well as arrangment of a rack displacement detector 21 and function generator 22 to output a pump control coefficient signal at the time of the rack displacement being over the predetermined value. An arithmetic unit 19 is provided to control a regulator 15 of pump 14 in accordance with the signal of tilting angle, and the tilting angle is controlled to be smaller as the input torque of engine 11 approaches the maximum output torque. Thus the input torque can be made small to utilize the output of the engine 11 effectively.
COPYRIGHT: (C)1982,JPO&Japio
JP56000766A 1981-01-08 1981-01-08 Input restriction unit for hydraulic pump Granted JPS57116183A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56000766A JPS57116183A (en) 1981-01-08 1981-01-08 Input restriction unit for hydraulic pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56000766A JPS57116183A (en) 1981-01-08 1981-01-08 Input restriction unit for hydraulic pump

Publications (2)

Publication Number Publication Date
JPS57116183A true JPS57116183A (en) 1982-07-20
JPH0240873B2 JPH0240873B2 (en) 1990-09-13

Family

ID=11482811

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56000766A Granted JPS57116183A (en) 1981-01-08 1981-01-08 Input restriction unit for hydraulic pump

Country Status (1)

Country Link
JP (1) JPS57116183A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991004415A1 (en) * 1989-09-22 1991-04-04 Kabushiki Kaisha Komatsu Seisakusho Capacity control circuit for variable capacity pump

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991004415A1 (en) * 1989-09-22 1991-04-04 Kabushiki Kaisha Komatsu Seisakusho Capacity control circuit for variable capacity pump
US5226800A (en) * 1989-09-22 1993-07-13 Kabushiki Kaisha Komatsu Seisakusho Displacement controlling circuit system for variable displacement pump

Also Published As

Publication number Publication date
JPH0240873B2 (en) 1990-09-13

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