JPS5491801A - Pump ejection control circuit - Google Patents

Pump ejection control circuit

Info

Publication number
JPS5491801A
JPS5491801A JP15775677A JP15775677A JPS5491801A JP S5491801 A JPS5491801 A JP S5491801A JP 15775677 A JP15775677 A JP 15775677A JP 15775677 A JP15775677 A JP 15775677A JP S5491801 A JPS5491801 A JP S5491801A
Authority
JP
Japan
Prior art keywords
pressure
control valve
port
control valves
pump
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
JP15775677A
Other languages
Japanese (ja)
Inventor
Toshihiko Kanbayashi
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
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 filed Critical Daikin Industries Ltd
Priority to JP15775677A priority Critical patent/JPS5491801A/en
Publication of JPS5491801A publication Critical patent/JPS5491801A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Of Positive-Displacement Pumps (AREA)

Abstract

PURPOSE: To reduce power loss, heat generation and noise at the time when the actuator is stopped in a pump, by using a combination of circuits containing a circuit in which 3-port type pressure-control valves are inserted.
CONSTITUTION: When direction-control valve 30 is in the middle position, line 42 of pressure-control valve 22 is opened to the tank via passage 43. Pressure-control valve spring 40 is designed for a smaller load than those of the springs of two pressure-control valves 33 and 24. Consequently, pressure-control valve 22 is switched by the pressure of main line 20, and Port P' and Port A' are linked. For this reason, two pressure-control valves 33 and 24 assume the states as shown in the drawing due to the forces of their respective springs, and main line 20 and No. 2 yoke cylinder 26 are linked via pressure-control valve 22. As a result, the pump ejection pressure is controlled to a low pressure.
COPYRIGHT: (C)1979,JPO&Japio
JP15775677A 1977-12-29 1977-12-29 Pump ejection control circuit Pending JPS5491801A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15775677A JPS5491801A (en) 1977-12-29 1977-12-29 Pump ejection control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15775677A JPS5491801A (en) 1977-12-29 1977-12-29 Pump ejection control circuit

Publications (1)

Publication Number Publication Date
JPS5491801A true JPS5491801A (en) 1979-07-20

Family

ID=15656643

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15775677A Pending JPS5491801A (en) 1977-12-29 1977-12-29 Pump ejection control circuit

Country Status (1)

Country Link
JP (1) JPS5491801A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5677675U (en) * 1979-11-22 1981-06-24

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5677675U (en) * 1979-11-22 1981-06-24

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