公开(公告)号：WO2020130851A1

公开(公告)日：2020-06-25

申请号：PCT/NO2019/050287

申请日：2019-12-20

Applicant: DIINEF AS

Inventor： LINDHOLDT, Per Nielsen ,  NERLAND, Geir-Kjetil ,  LARSEN, Henrik Bollerup

IPC: F04B7/00 ,  F04B49/03 ,  F04B49/035 ,  F04B49/06

Abstract: Idling a hydraulic machine, comprising; - electronically controlled high and low-pressure valves - a control system arranged to control opening and closing of said valves, - a first idle safety valve arrangement arranged between the first working chamber and a fluid sink with a pressure equal to or lower than the high pressure, - operating the hydraulic machine in an empty cylinder idle mode, wherein the high and low-pressure valves are concurrently closed for at least a whole cycle of the varying volume, and - releasing hydraulic fluid to the fluid sink only when fluid pressure in the working chamber increases above a set threshold and the empty cylinder mode is enabled, - enabling the first idle safety valve arrangement when the hydraulic machine operates in the empty cylinder idle mode, and disabling when not.

公开(公告)号：WO2015112025A1

公开(公告)日：2015-07-30

申请号：PCT/NO2015/050017

申请日：2015-01-27

Applicant: DIINEF AS

Inventor： LINDHOLDT, Per Nielsen ,  NERLAND, Geir Kjetil ,  LARSEN, Henrik Bollerup

IPC: F04B7/00 ,  F04B7/02 ,  F04B49/06

CPC classification number: F04B7/0266 ,  F04B7/00 ,  F04B49/065

Abstract: A method for controlling a positive displacement hydraulic machine with two or more working chambers (4), each in fluid contact with a valve arrangement (1) comprising a controllable high pressure valve (20h) and a controllable low pressure valve (20l), the method comprising the following steps: determine an instant contribution value for each of the working chambers, evaluate possible combinations of contribution values, choose a combination of contribution values based on a selection criteria, and activate or de-activate each working chamber based on the chosen combination of contribution values, by sending control signals from a control system to the controllable high pressure valves and the controllable low pressure valves.

Abstract translation: 一种用于控制具有两个或更多个工作室（4）的正排量液压机的方法，每个工作室与包括可控高压阀（20h）和可控低压阀（20l）的阀装置（1）流体接触， 方法包括以下步骤：确定每个工作室的瞬时贡献值，评估贡献值的可能组合，基于选择标准选择贡献值的组合，以及基于所选择的激活或去激活每个工作室 通过将控制信号从控制系统发送到可控制的高压阀和可控制的低压阀，来贡献值的组合。