公开(公告)号：WO2018166984A1

公开(公告)日：2018-09-20

申请号：PCT/EP2018/056109

申请日：2018-03-12

Applicant: PARKER HANNIFIN EMEA S.À.R.L.

Inventor： ERIKSSON, Björn

IPC: F15B11/042 ,  F15B11/044 ,  F15B20/00

CPC classification number: F15B11/044 ,  F15B11/042 ,  F15B20/007 ,  F15B2211/3057 ,  F15B2211/3144 ,  F15B2211/351 ,  F15B2211/353 ,  F15B2211/455 ,  F15B2211/46 ,  F15B2211/6309 ,  F15B2211/6313 ,  F15B2211/6346 ,  F15B2211/7053

Abstract: The disclosure concerns a method for controlling the pressure in the chambers of a hydraulic cylinder (1) having a meter-out chamber (2) and a meter-in chamber (3). A meter-out valve (7) is connected to the meter-out chamber (2) for regulating the fluid out from the meter-out chamber (2) and a meter-in valve (8) is connected to the meter-in chamber (3) for regulating the fluid into the meter-in chamber (3). The method comprising the steps of sensing the pressure associated with the meter-out chamber (2) with a first pressure sensor (4) which is generating a first pressure signal, sensing the pressure associated with the meter-in chamber (3) with a second pressure sensor (5) which is generating a second pressure signal, processing the first pressure signal in a first signal processing filter (9) into a filtered first pressure signal, wherein in response to the filtered first pressure signal and a filtered or non-filtered second pressure signal delivering a control signal from a control unit (6) to the meter-out valve (7), and wherein the meter-out valve (7) in response to the control signal controls the pressure in the meter-in chamber (3) by regulating the fluid out from the meter-out chamber (2). The disclosure also relates to a corresponding system for controlling the pressure in the chambers of a hydraulic cylinder (1) having a meter-out chamber (2) and a meter-in chamber (3).

公开(公告)号：WO2019238682A1

公开(公告)日：2019-12-19

申请号：PCT/EP2019/065218

申请日：2019-06-11

Applicant: PARKER HANNIFIN EMEA S.À.R.L.

Inventor： ERIKSSON, Björn ,  EKSTRAND, Martin

IPC: F15B11/042 ,  F15B11/044 ,  F15B13/04 ,  F15B13/043 ,  F15B13/08

Abstract: The present disclosure relates to a hydraulic valve arrangement comprising a first pilot operated proportional directional control valve (10) having a first valve member (11) that is displaceable in a first and a second axial direction (12, 13) for controlling direction of supply and discharge of hydraulic fluid to and from a hydraulic actuator (60), a first proportional electro-hydraulic control valve (30) for controlling displacement of the first valve member (11) in the first axial direction (12), a second proportional electro-hydraulic control valve (40) for controlling displacement of the first valve member (11) in the second axial direction (13), and a second pilot operated proportional control valve (20) having a second valve member (21) configured to be controlled by the first and second proportional electro-hydraulic control valves (30, 40) via a shuttle valve arrangement (50). Individual meter-in and meter-out control of the hydraulic actuator (60) is providable by having the second pilot operated proportional control valve (20) configured to operate as a meter-in valve of the hydraulic actuator (60) and the first pilot operated proportional directional control valve (10) configured to operate as a meter-out valve of the hydraulic actuator (60), or by having the first pilot operated proportional directional control valve (10) configured to operate as a meter-in valve of the hydraulic actuator (60) and the second pilot operated proportional control valve (20) configured to operate as a meter-out valve of the hydraulic actuator (60). The present disclosure also relates to a vehicle comprising a hydraulic actuator (60)and a hydraulic valve arrangement (1) for controlling the motion of the hydraulic actuator (60).