JPS5783753A - Variable capacity type pump control device - Google Patents

Variable capacity type pump control device

Info

Publication number
JPS5783753A
JPS5783753A JP55157339A JP15733980A JPS5783753A JP S5783753 A JPS5783753 A JP S5783753A JP 55157339 A JP55157339 A JP 55157339A JP 15733980 A JP15733980 A JP 15733980A JP S5783753 A JPS5783753 A JP S5783753A
Authority
JP
Japan
Prior art keywords
pilot
pressure
servo
inclining
piston
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
JP55157339A
Other languages
Japanese (ja)
Other versions
JPH0151707B2 (en
Inventor
Naoharu Nakagaki
Makoto Yamamoto
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.)
Kawasaki Heavy Industries Ltd
Kawasaki Motors Ltd
Original Assignee
Kawasaki Heavy Industries Ltd
Kawasaki Jukogyo KK
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 Kawasaki Heavy Industries Ltd, Kawasaki Jukogyo KK filed Critical Kawasaki Heavy Industries Ltd
Priority to JP55157339A priority Critical patent/JPS5783753A/en
Publication of JPS5783753A publication Critical patent/JPS5783753A/en
Publication of JPH0151707B2 publication Critical patent/JPH0151707B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Control Of Positive-Displacement Pumps (AREA)
  • Control Of Fluid Gearings (AREA)

Abstract

PURPOSE: To enable effective control with low pump flow rate by providing a compensating piston actuated by the pump discharge pressure and a pilot piston actuated by the external command pressure at a compensation pressure receiving part arranged at the both ends of a spool.
CONSTITUTION: When a pilot pressure Pi is introduced into a pilot chamber 63 at the neutral condition a pilot 62 together with a compensation pressure receiving part 29 moves to right against springs 61 and 30 thereby breaking the balance among the springs 22, 27, 30 and 30' to move a spool 26 to right also, then through holes 42 and 43 are opened to apply the servo pressure Ps to a fluid chamber 46 of a servo cylinder 7 while a servo piston 51 moves to left as a fluid chamber 49 is connected to a tank 65 via a tank passage 39 thereby controlling the inclining angle of a pump 2 via a inclining lever 52 and inclining point pin 53. The movement of the servo piston 51 is transmitted to a sleeve 21 by a feedback lever 8 to close the holes 42 and 43.
COPYRIGHT: (C)1982,JPO&Japio
JP55157339A 1980-11-07 1980-11-07 Variable capacity type pump control device Granted JPS5783753A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55157339A JPS5783753A (en) 1980-11-07 1980-11-07 Variable capacity type pump control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55157339A JPS5783753A (en) 1980-11-07 1980-11-07 Variable capacity type pump control device

Publications (2)

Publication Number Publication Date
JPS5783753A true JPS5783753A (en) 1982-05-25
JPH0151707B2 JPH0151707B2 (en) 1989-11-06

Family

ID=15647520

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55157339A Granted JPS5783753A (en) 1980-11-07 1980-11-07 Variable capacity type pump control device

Country Status (1)

Country Link
JP (1) JPS5783753A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101210733B1 (en) 2010-12-02 2012-12-10 두산모트롤주식회사 The regulator for the hydraulic pump of the excavator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101210733B1 (en) 2010-12-02 2012-12-10 두산모트롤주식회사 The regulator for the hydraulic pump of the excavator

Also Published As

Publication number Publication date
JPH0151707B2 (en) 1989-11-06

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