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Title:
VARIABLE DISPLACEMENT VANE PUMP
Document Type and Number:
WIPO Patent Application WO/2016/175090
Kind Code:
A1
Abstract:
A variable displacement vane pump is provided with: a control orifice 104 for applying resistance to the flow of hydraulic oil discharged from a pump chamber 6; a flow rate control valve 102 for controlling, depending on the pressure difference across the control orifice 104, the flow rate of the hydraulic oil discharged from the pump chamber 6; a variable control valve 103 operated by hydraulic oil which has passed through the control orifice 104 and controlling the difference between pressure in a first hydraulic pressure chamber 15 and pressure in a second hydraulic pressure chamber 16, thereby controlling the amount of eccentricity of a cam ring 4 relative to a rotor 2; and a return passage 42 connected to the flow rate control valve 102 and returning a part of the hydraulic oil, which is discharged from the pump chamber 6, to a suction passage 40.

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Inventors:
AKATSUKA KOICHIRO (JP)
FUJITA TOMOYUKI (JP)
NAKAGAWA TOMOYUKI (JP)
KATOU FUMIYASU (JP)
GOMI HIROKI (JP)
Application Number:
PCT/JP2016/062416
Publication Date:
November 03, 2016
Filing Date:
April 19, 2016
Export Citation:
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Assignee:
KYB CORP (JP)
International Classes:
F04C14/24; F04C2/344; F04C14/22; F04C14/26
Foreign References:
JP2002276565A2002-09-25
JP2009264192A2009-11-12
JPS56148693A1981-11-18
JPS59131989U1984-09-04
US20050100447A12005-05-12
Other References:
See also references of EP 3290710A4
Attorney, Agent or Firm:
GOTO, Masaki et al. (JP)
Masaki Goto (JP)
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