EP1674729A3 - Pump device - Google Patents

Pump device Download PDF

Info

Publication number
EP1674729A3
EP1674729A3 EP05027802A EP05027802A EP1674729A3 EP 1674729 A3 EP1674729 A3 EP 1674729A3 EP 05027802 A EP05027802 A EP 05027802A EP 05027802 A EP05027802 A EP 05027802A EP 1674729 A3 EP1674729 A3 EP 1674729A3
Authority
EP
European Patent Office
Prior art keywords
choke
working oil
discharge passage
low temperature
temperature state
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.)
Withdrawn
Application number
EP05027802A
Other languages
German (de)
French (fr)
Other versions
EP1674729A2 (en
Inventor
Tomoyuki c/o Kayaba Industry Co. Ltd. Fujita
Masamichi c/o Kayaba Industry Co. Ltd. Sugihara
Yoshinobu c/o Kayaba Industry Co. Ltd. Yasue
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.)
KYB Corp
Original Assignee
Kayaba Industry 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 Kayaba Industry Co Ltd filed Critical Kayaba Industry Co Ltd
Publication of EP1674729A2 publication Critical patent/EP1674729A2/en
Publication of EP1674729A3 publication Critical patent/EP1674729A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/24—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves
    • F04C14/26—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves using bypass channels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/50—Conditions before a throttle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/52—Conditions after a throttle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/70—Safety, emergency conditions or requirements
    • F04C2270/701—Cold start

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Rotary Pumps (AREA)
  • Reciprocating Pumps (AREA)

Abstract

A fixed capacity pump (P) sucks working oil from a reservoir (R) through a conduit (Rp) and a suction passage (1), and discharges the pressurized working oil into a discharge passage (2) connected to an actuator (A). A choke (21) is disposed in the discharge passage (2), and a flow control valve (F) recirculates a part of the working oil in the discharge passage (2) upstream of the choke (21) to the suction passage (1) according to a pressure loss generated by the choke (21). The characteristic of the choke (21) which significantly increases the flow resistance in a low temperature state makes the flow rate of the recirculated working oil increase, thereby preventing cavitation/noise from occurring in the pump (P) when operated at high speed and in a low temperature state.
EP05027802A 2004-12-22 2005-12-19 Pump device Withdrawn EP1674729A3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2004370463A JP2006177230A (en) 2004-12-22 2004-12-22 Pump device

Publications (2)

Publication Number Publication Date
EP1674729A2 EP1674729A2 (en) 2006-06-28
EP1674729A3 true EP1674729A3 (en) 2012-10-17

Family

ID=36096147

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05027802A Withdrawn EP1674729A3 (en) 2004-12-22 2005-12-19 Pump device

Country Status (4)

Country Link
US (1) US20060222519A1 (en)
EP (1) EP1674729A3 (en)
JP (1) JP2006177230A (en)
CN (1) CN1793651A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2042737B1 (en) * 2007-09-28 2016-01-13 Parker-Hannifin Corporation Pressure recovery system
JP5700225B2 (en) * 2009-06-03 2015-04-15 イートン コーポレーションＥａｔｏｎ Ｃｏｒｐｏｒａｔｉｏｎ Fluidic device with magnetic latching valve
JP5544904B2 (en) * 2010-01-29 2014-07-09 株式会社ジェイテクト Flow control device
JP6393560B2 (en) * 2014-08-29 2018-09-19 Ｋｙｂ株式会社 Pump device
KR20160150161A (en) * 2015-06-18 2016-12-29 현대자동차주식회사 Method for noise mitigation of electronic oil pump

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2887060A (en) * 1953-06-22 1959-05-19 American Brake Shoe Co Variable volume pumping mechanism
US3632232A (en) * 1969-04-01 1972-01-04 Toyoda Machine Works Ltd Rotary pump
EP0045928A1 (en) * 1980-08-11 1982-02-17 Vickers Incorporated Power transmission
EP0505033A1 (en) * 1991-03-11 1992-09-23 Ford Motor Company Limited Viscosity sensitive hydraulic pump flow control
JP2001073963A (en) * 1999-08-31 2001-03-21 Kayaba Ind Co Ltd Seizure preventing structure of vane pump

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58113892U (en) * 1982-01-29 1983-08-03 三菱自動車工業株式会社 Oil pump device for power steering
JPH01178783A (en) * 1987-12-29 1989-07-14 Nippon Denso Co Ltd Control system for hydraulic actuator
JP3729525B2 (en) * 1994-12-16 2005-12-21 ジヤトコ株式会社 Line pressure controller for variable displacement oil pump
US5860797A (en) * 1995-04-04 1999-01-19 Aisin Seiki Kabushiki Kaisha Flow rate control device for a pump
JP3732884B2 (en) * 1996-04-22 2006-01-11 株式会社ルネサステクノロジ Internal power supply voltage generation circuit, internal voltage generation circuit, and semiconductor device
DE19652420A1 (en) * 1996-12-09 1998-06-10 Luk Fahrzeug Hydraulik Flow control arrangement for a hydraulic conveyor
US5973356A (en) * 1997-07-08 1999-10-26 Micron Technology, Inc. Ultra high density flash memory
JP2000161246A (en) * 1998-06-23 2000-06-13 Bosch Braking Systems Co Ltd Oil pump

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2887060A (en) * 1953-06-22 1959-05-19 American Brake Shoe Co Variable volume pumping mechanism
US3632232A (en) * 1969-04-01 1972-01-04 Toyoda Machine Works Ltd Rotary pump
EP0045928A1 (en) * 1980-08-11 1982-02-17 Vickers Incorporated Power transmission
EP0505033A1 (en) * 1991-03-11 1992-09-23 Ford Motor Company Limited Viscosity sensitive hydraulic pump flow control
JP2001073963A (en) * 1999-08-31 2001-03-21 Kayaba Ind Co Ltd Seizure preventing structure of vane pump

Also Published As

Publication number Publication date
JP2006177230A (en) 2006-07-06
EP1674729A2 (en) 2006-06-28
US20060222519A1 (en) 2006-10-05
CN1793651A (en) 2006-06-28

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