JPS5757902A - Fluid circuit - Google Patents

Fluid circuit

Info

Publication number
JPS5757902A
JPS5757902A JP55131894A JP13189480A JPS5757902A JP S5757902 A JPS5757902 A JP S5757902A JP 55131894 A JP55131894 A JP 55131894A JP 13189480 A JP13189480 A JP 13189480A JP S5757902 A JPS5757902 A JP S5757902A
Authority
JP
Japan
Prior art keywords
variable displacement
displacement pump
flow direction
direction control
valve
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
JP55131894A
Other languages
Japanese (ja)
Inventor
Kenji Masuda
Toshio Ikeda
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.)
Daikin Industries Ltd
Original Assignee
Daikin Industries Ltd
Daikin Kogyo 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 Daikin Industries Ltd, Daikin Kogyo Co Ltd filed Critical Daikin Industries Ltd
Priority to JP55131894A priority Critical patent/JPS5757902A/en
Publication of JPS5757902A publication Critical patent/JPS5757902A/en
Pending legal-status Critical Current

Links

Landscapes

  • Operation Control Of Excavators (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

PURPOSE: To improve starting quality of an engine driving a variable displacement pump used in construction machinery or the like, by operating the variable displacement pump with less starting torque.
CONSTITUTION: At neutral time of the first flow direction control valves 31aW31c, the front position of a priority type pressure compensating valve 30 is communicated, between the second flow direction control valve 32, connected to its bypass port 35, and the bypass port 35, through an unload line 52. In this way, delivery pressure of a variable displacement pump 18 can be directly transmitted to the pilot chamber of a pilot valve 21a to promptly reduce a delivery amount, thus starting quality of an engine can be improved.
COPYRIGHT: (C)1982,JPO&Japio
JP55131894A 1980-09-22 1980-09-22 Fluid circuit Pending JPS5757902A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55131894A JPS5757902A (en) 1980-09-22 1980-09-22 Fluid circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55131894A JPS5757902A (en) 1980-09-22 1980-09-22 Fluid circuit

Publications (1)

Publication Number Publication Date
JPS5757902A true JPS5757902A (en) 1982-04-07

Family

ID=15068633

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55131894A Pending JPS5757902A (en) 1980-09-22 1980-09-22 Fluid circuit

Country Status (1)

Country Link
JP (1) JPS5757902A (en)

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