公开(公告)号：US20180112661A1

公开(公告)日：2018-04-26

申请号：US15568844

申请日：2016-04-19

Applicant: KYB Corporation

Inventor： Koichiro AKATSUKA ,  Tomoyuki FUJITA ,  Tomoyuki NAKAGAWA ,  Fumiyasu KATOU ,  Hiroki GOMI

IPC: F04C14/26 ,  F04C14/22 ,  F04C2/344

CPC classification number: F04C14/26 ,  F04B2201/1213 ,  F04C2/344 ,  F04C14/22 ,  F04C14/223 ,  F04C14/24 ,  F04C2210/206 ,  F04C2270/20 ,  F04C2270/215 ,  F04C2270/585

Abstract: A variable displacement vane pump includes: a control orifice that imparts resistance to a flow of working oil discharged from pump chambers; a flow-amount control valve that operates in accordance with an upstream-downstream differential pressure of the control orifice and controls a flow amount of the working oil discharged from the pump chambers; a variable control valve that is operated by the working oil that has passed through the control orifice and controls an amount of eccentricity of a cam ring with respect to a rotor by controlling a pressure difference between a first fluid pressure chamber and a second fluid pressure chamber; and a return passage that is connected to the flow-amount control valve and circulates a part of the working oil discharged from the pump chambers through a suction passage.

公开(公告)号：US20160377078A1

公开(公告)日：2016-12-29

申请号：US15125837

申请日：2015-09-02

Applicant: KYB Corporation

Inventor： Koichiro AKATSUKA ,  Tomoyuki FUJITA ,  Tomoyuki NAKAGAWA ,  Fumiyasu KATOU ,  Hiroki GOMI

IPC: F04C14/26 ,  F04C15/06 ,  F04C2/344

CPC classification number: F04C14/26 ,  F04C2/3446 ,  F04C15/06 ,  F04C2210/206 ,  F04C2240/10 ,  F04C2240/20 ,  F04C2270/215 ,  F04C2270/585 ,  F04C2270/86

Abstract: A pump device includes a pump, a flow control valve having a spool that returns a part of working fluid discharged from the pump to a suction side, and a differential pressure adjusting device that adjusts a differential pressure acting on both end portions of the spool to a target differential pressure, and the differential pressure adjusting device includes a pressure regulating chamber that communicates with a second fluid pressure chamber and a pilot chamber into which pressure in the discharge channel is guided: and a pressure in the pressure regulating chamber is adjusted such that a differential pressure between the pressure in the pressure regulating chamber and a pressure in the pilot chamber becomes the target differential pressure.

Abstract translation: 泵装置包括泵，流量控制阀，其具有将从泵排出的工作流体的一部分返回到吸入侧的阀芯，以及调节作用于阀芯的两端部的压差的压差调节装置， 目标压差，压差调节装置包括与第二流体压力室和引导室连通的压力调节室，排气通道中的压力被引导到该导向室中;压力调节室中的压力被调整为使得 压力调节室中的压力与先导室中的压力之间的压差成为目标压差。