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公开(公告)号：US20180045196A1
公开(公告)日：2018-02-15
申请号：US15676195
申请日：2017-08-14
发明人： William Rampen , Niall Caldwell , Stephen Laird , Michael Fielding , Peter McCurry , Mark Brett
CPC分类号： F04B49/225 , F01B25/08 , F04B7/0076 , F04B49/065 , F04B49/12 , F04B49/22 , F04B49/24 , F04B51/00 , F04B53/1082 , F04B2201/02 , F04B2201/08 , F16K31/0655 , F16K31/082 , F16K37/0041
摘要： A valve unit for a fluid working machine comprise a valve having a valve member (and optionally a valve seat), a valve actuator coupled to the valve member, and an electronic actuator controller which is integral to the valve unit and configured to actively control the valve actuator to thereby control the valve member.
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公开(公告)号：US11073147B2
公开(公告)日：2021-07-27
申请号：US16138276
申请日：2018-09-21
发明人： Mark Brett , Peter McCurry
摘要： A measurement of the pressure of hydraulic fluid in a fluid working machine can be determined from the timing of the movement of valves which selectively seal a working chamber of cyclically varying volume from a fluid gallery. The timing of opening of a low pressure valve, to connect a working chamber to a low pressure fluid gallery, following the closure of a high pressure valve to seal a working chamber can be used to estimate the pressure in the high pressure fluid gallery at the moment of closure of the high pressure valve.
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公开(公告)号：US11002267B2
公开(公告)日：2021-05-11
申请号：US15676195
申请日：2017-08-14
发明人： William Rampen , Niall Caldwell , Stephen Laird , Michael Fielding , Peter McCurry , Mark Brett
摘要： A valve unit for a fluid working machine comprise a valve having a valve member (and optionally a valve seat), a valve actuator coupled to the valve member, and an electronic actuator controller which is integral to the valve unit and configured to actively control the valve actuator to thereby control the valve member.
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