JPH04347382A - Pump discharge pressure controller - Google Patents

Pump discharge pressure controller

Info

Publication number
JPH04347382A
JPH04347382A JP3118779A JP11877991A JPH04347382A JP H04347382 A JPH04347382 A JP H04347382A JP 3118779 A JP3118779 A JP 3118779A JP 11877991 A JP11877991 A JP 11877991A JP H04347382 A JPH04347382 A JP H04347382A
Authority
JP
Japan
Prior art keywords
hydraulic
hydraulic motor
pump
pressure
pressure controller
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
JP3118779A
Other languages
Japanese (ja)
Inventor
Yasuhiro Horiuchi
Masahiko Suzuki
Hiroo Takasaki
So Yokoyama
Original Assignee
Nippondenso 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 Nippondenso Co Ltd filed Critical Nippondenso Co Ltd
Priority to JP3118779A priority Critical patent/JPH04347382A/en
Publication of JPH04347382A publication Critical patent/JPH04347382A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01PCOOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00Controlling of coolant flow
    • F01P7/02Controlling of coolant flow the coolant being cooling-air
    • F01P7/04Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio
    • F01P7/044Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio using hydraulic drives

Abstract

PURPOSE: To provide a pump discharge pressure controller that controls a hydraulic motor, driving a fan constituting an engine cooling system, stably by means of a hydraulic pump being driven by, for example, an internal combustion engine.
CONSTITUTION: A discharge fluid out of a hydraulic pump 11 driven by an internal combustion engine is fed to a hydraulic motor 14, and a pilot fluid circuit 18 is formed in parallel with this hydraulic motor 14. In addition, a throttle mechanism 20 and a hydraulic control valve 19 are installed in this hydraulic circuit 18 in series, while an upstream pressure port 244 and a downstream pressure port 245 are derived each from both upstream and downstream sides of this throttle mechanism 20, and a four-way valve 24 is controlled to be selected by a pressure differential between both these ports 244 and 245. In succession, a cam ring 111 setting a capacity of the hydraulic pump 11 by means of output out of this four-way valve 24 is controlled to be displaced, through which constant operating pressure is made so as to act on the hydraulic motor 14.
COPYRIGHT: (C)1992,JPO&Japio
JP3118779A 1991-05-23 1991-05-23 Pump discharge pressure controller Pending JPH04347382A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3118779A JPH04347382A (en) 1991-05-23 1991-05-23 Pump discharge pressure controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3118779A JPH04347382A (en) 1991-05-23 1991-05-23 Pump discharge pressure controller

Publications (1)

Publication Number Publication Date
JPH04347382A true JPH04347382A (en) 1992-12-02

Family

ID=14744874

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3118779A Pending JPH04347382A (en) 1991-05-23 1991-05-23 Pump discharge pressure controller

Country Status (1)

Country Link
JP (1) JPH04347382A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH074888U (en) * 1993-05-27 1995-01-24 信義 藤井 Simple pump with flow path switching valve
JP2004251267A (en) * 2002-04-03 2004-09-09 Borgwarner Inc Variable displacement pump and its control system
JP2006138228A (en) * 2004-11-10 2006-06-01 Goodrich Pump & Engine Control Systems Inc Flow control system for gas turbine engine
JP2009257167A (en) * 2008-04-15 2009-11-05 Kayaba Ind Co Ltd Variable displacement vane pump
JP4559663B2 (en) * 2001-05-25 2010-10-13 株式会社小松製作所 Drive control device for cooling fan
JP2013076409A (en) * 2013-01-17 2013-04-25 Man Diesel & Turbo Filial Af Man Diesel & Turbo Se Tyskland Propulsion system for marine vessel

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH074888U (en) * 1993-05-27 1995-01-24 信義 藤井 Simple pump with flow path switching valve
JP4559663B2 (en) * 2001-05-25 2010-10-13 株式会社小松製作所 Drive control device for cooling fan
JP2004251267A (en) * 2002-04-03 2004-09-09 Borgwarner Inc Variable displacement pump and its control system
JP2006138228A (en) * 2004-11-10 2006-06-01 Goodrich Pump & Engine Control Systems Inc Flow control system for gas turbine engine
JP2009257167A (en) * 2008-04-15 2009-11-05 Kayaba Ind Co Ltd Variable displacement vane pump
JP2013076409A (en) * 2013-01-17 2013-04-25 Man Diesel & Turbo Filial Af Man Diesel & Turbo Se Tyskland Propulsion system for marine vessel

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