JPS5770980A - Variable displacement hydraulic pump - Google Patents

Variable displacement hydraulic pump

Info

Publication number
JPS5770980A
JPS5770980A JP55147129A JP14712980A JPS5770980A JP S5770980 A JPS5770980 A JP S5770980A JP 55147129 A JP55147129 A JP 55147129A JP 14712980 A JP14712980 A JP 14712980A JP S5770980 A JPS5770980 A JP S5770980A
Authority
JP
Japan
Prior art keywords
pump
switch over
discharge conduit
valves
engine
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
JP55147129A
Other languages
Japanese (ja)
Inventor
Fusao Higashida
Takao Komada
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 JP55147129A priority Critical patent/JPS5770980A/en
Publication of JPS5770980A publication Critical patent/JPS5770980A/en
Pending legal-status Critical Current

Links

Landscapes

  • Reciprocating Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

PURPOSE: To prevent occurance of engine stop, by connecting the discharge conduit of a speed sensing pump to the pressurized chamber of switch over valves, and by connecting the discharge conduit of pump elements to the piston chambers of control valves in way of switch over valves.
CONSTITUTION: A discharge conduit of a speed sensing pump P is connected to pressurized chambers of switch over valves, and the discharge conduits 7 of pump elements A are connected to piston chambers 6a of control pistons 6 provided on the actuating sides of discharging pressure of control valve units B through switch over valve 9. When the driving torque of pump exceeds the engine torque, the piston chamber 6a is communicated with the discharge conduit 7 by the switch over valve 9 in order that the discharging pressure of pump element A is reduced as spools 5 are shifted. Thereby occurrence of engine stop is prevented since the output of the pump elements A can be restrained when the rotational speed of the engine E reaches low speed range.
COPYRIGHT: (C)1982,JPO&Japio
JP55147129A 1980-10-20 1980-10-20 Variable displacement hydraulic pump Pending JPS5770980A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55147129A JPS5770980A (en) 1980-10-20 1980-10-20 Variable displacement hydraulic pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55147129A JPS5770980A (en) 1980-10-20 1980-10-20 Variable displacement hydraulic pump

Publications (1)

Publication Number Publication Date
JPS5770980A true JPS5770980A (en) 1982-05-01

Family

ID=15423207

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55147129A Pending JPS5770980A (en) 1980-10-20 1980-10-20 Variable displacement hydraulic pump

Country Status (1)

Country Link
JP (1) JPS5770980A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002046649A (en) * 2000-08-02 2002-02-12 Fuji Heavy Ind Ltd Cowl panel-front bulkhead structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002046649A (en) * 2000-08-02 2002-02-12 Fuji Heavy Ind Ltd Cowl panel-front bulkhead structure

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