公开(公告)号：US10337532B2

公开(公告)日：2019-07-02

申请号：US15367675

申请日：2016-12-02

Applicant: Caterpillar Inc.

Inventor： Pengfei Ma ,  Aleksandar Egelja ,  Justin Speichinger ,  Shuhei Orimoto ,  Tetsuya Yoshino ,  Hideki Nakajima ,  Shogo Tada ,  Aleem Junaidi ,  Bryan Johnson ,  Matthew Beschorner

IPC: F15B13/04 ,  F15B11/08 ,  F15B13/02 ,  F15B21/14 ,  F15B1/26 ,  F15B13/044 ,  F15B11/00 ,  F15B11/024

Abstract: A hydraulic system is disclosed. The hydraulic system may include a source of pressurized fluid; a tank; a hydraulic actuator including a first chamber and a second chamber; a first independent metering valve disposed between and fluidly connected to the source, the tank, and the first chamber of the hydraulic actuator; and a second independent metering valve disposed between and fluidly connected to the source, the tank, and the second chamber of the hydraulic actuator. Each of the first independent metering valve and the second independent metering valve may include a spool and a valve actuator disposed on one side of the spool. The valve actuator may include a push coil, a pull coil, and a force feedback mechanism configured to balance a force of the push coil and the pull coil.

公开(公告)号：US20180156244A1

公开(公告)日：2018-06-07

申请号：US15367675

申请日：2016-12-02

Applicant: Caterpillar Inc.

Inventor： Pengfei Ma ,  Aleksandar Egelja ,  Justin Speichinger ,  Shuhei Orimoto ,  Tetsuya Yoshino ,  Hideki Nakajima ,  Shogo Tada ,  Aleem Junaidi ,  Bryan Johnson ,  Matthew Beschorner

IPC: F15B13/04 ,  F15B11/08 ,  F15B13/02 ,  F15B21/14 ,  F15B1/26 ,  F15B13/044

CPC classification number: F15B13/0402 ,  F15B1/26 ,  F15B11/003 ,  F15B11/024 ,  F15B11/08 ,  F15B13/021 ,  F15B13/024 ,  F15B13/044 ,  F15B13/0442 ,  F15B21/14 ,  F15B2011/0246 ,  F15B2211/50

Abstract: A hydraulic system is disclosed. The hydraulic system may include a source of pressurized fluid; a tank; a hydraulic actuator including a first chamber and a second chamber; a first independent metering valve disposed between and fluidly connected to the source, the tank, and the first chamber of the hydraulic actuator; and a second independent metering valve disposed between and fluidly connected to the source, the tank, and the second chamber of the hydraulic actuator. Each of the first independent metering valve and the second independent metering valve may include a spool and a valve actuator disposed on one side of the spool. The valve actuator may include a push coil, a pull coil, and a force feedback mechanism configured to balance a force of the push coil and the pull coil.