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    VARIABLE DISPLACEMENT PUMP
    4.
    发明申请
    VARIABLE DISPLACEMENT PUMP 有权
    可变位移泵

    公开(公告)号：US20140147323A1

    公开(公告)日：2014-05-29

    申请号：US14086473

    申请日：2013-11-21

    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.

    Inventor： Yasushi WATANABE ,  Koji Saga ,  Hideaki Ohnishi

    IPC: F04C14/22 ,  F04C2/344

    CPC classification number: F04C2/3442 ,  F04B49/002 ,  F04B49/125 ,  F04C14/226 ,  F04C2210/206 ,  F04C2270/185 ,  F04C2270/58 ,  F04C2270/585

    Abstract: A variable displacement pump including a control mechanism shiftable between first and second states, when the control mechanism is in the first state, the spool is in an initial position in which fluid communication between an introduction port and the remaining ports is restrained, fluid communication between a first control port and a drain port is allowed, and fluid communication between a second control port and the drain port is restrained, and when the control mechanism is shifted to the second state in accordance with increase in fluid pressure discharged, the spool is in an operating position in which the fluid communication between the introduction port and the first control port is allowed, the fluid communication between the first control port and the drain port is restrained, and the fluid communication between the second control port and the drain port is allowed.

    Abstract translation: 一种可变排量泵，其包括在第一状态和第二状态之间可移动的控制机构，当控制机构处于第一状态时，阀芯处于初始位置，在该初始位置，限制引入口与其余端口之间的流体连通， 允许第一控制端口和排放端口，并且限制第二控制端口和排出端口之间的流体连通，并且当控制机构根据排出的流体压力的增加而移动到第二状态时，阀芯处于 允许引入口和第一控制口之间的流体连通的操作位置被限制，第一控制端口和排出口之间的流体连通被限制，并且允许第二控制端口和排出端口之间的流体连通 。

    Variable Displacement Hydraulic Pump Control
    6.
    发明申请
    Variable Displacement Hydraulic Pump Control 有权
    可变排量液压泵控制

    公开(公告)号：US20130014498A1

    公开(公告)日：2013-01-17

    申请号：US13182647

    申请日：2011-07-14

    Applicant: Derek Kinch ,  Mark R. Dobson ,  Lev Pekarsky ,  Hrudaya Mahapatro

    Inventor： Derek Kinch ,  Mark R. Dobson ,  Lev Pekarsky ,  Hrudaya Mahapatro

    IPC: F16D31/00 ,  F16D31/02

    CPC classification number: F04C2/3442 ,  F04C14/226 ,  F04C2270/585 ,  F16H61/0021 ,  F16H61/0025 ,  Y10T137/0402

    Abstract: A system controlling pressure in a transmission including a variable displacement pump, a circuit carrying fluid from the pump to the transmission, a valve using fluid in said circuit to regulate pressure that controls displacement of the pump, a source of control pressure including an accumulator, a first spring acting with said source causing the valve to change the regulated pressure, and a second spring acting with feedback pressure from said circuit to oppose said change.

    Abstract translation: 一种控制变速器中的压力的​​系统，包括可变排量泵，将泵从泵传递到变速器的回路，使用所述回路中的流体来调节控制泵的位移的压力的阀，包括蓄能器的控制压力源， 与所述源作用的第一弹簧使得阀改变调节压力，以及作用于来自所述电路的反馈压力以反对所述变化的第二弹簧。

    Variable displacement pump with flow delivery to different systems with different pressure schedules
    7.
    发明授权
    Variable displacement pump with flow delivery to different systems with different pressure schedules 有权

    公开(公告)号：US11994078B1

    公开(公告)日：2024-05-28

    申请号：US18074782

    申请日：2022-12-05

    Applicant: Hamilton Sundstrand Corporation

    Inventor： Ryan Shook ,  Ryan Prescott Susca

    IPC: F02C9/30 ,  F16K31/04

    CPC classification number: F02C9/30 ,  F16K31/046 ,  F04C2270/18 ,  F04C2270/585

    Abstract: A system includes a variable displacement pump (VDP) with a pump inlet and a pump outlet. The VDP is configured to receive a flow at the pump inlet at a first pressure and to outlet a flow from the pump outlet at a second pressure elevated relative to the first pressure. The VDP includes a variable displacement mechanism configured to vary the second pressure. A controller is operatively connected to a pressure sensor and to the variable displacement mechanism for control of the VDP. An output splitter is configured to split flow from the pump outlet to a first outlet branch and to a second outlet branch for supplying two different systems each having a different pressure schedule. The output splitter is operatively connected to the controller, which is configured to control the output splitter to regulate pressure in both of the first and second outlet branches.

    CAPACITY CONTROL FOR CHILLERS HAVING SCREW COMPRESSORS
    8.
    发明申请
    CAPACITY CONTROL FOR CHILLERS HAVING SCREW COMPRESSORS 审中-公开

    公开(公告)号：US20190249666A1

    公开(公告)日：2019-08-15

    申请号：US16312929

    申请日：2017-06-01

    Applicant: Johnson Controls Technology Company

    Inventor： Gail E. Lindberg ,  Curtis C. Crane

    IPC: F04C28/12 ,  F04C18/16

    CPC classification number: F04C28/12 ,  F04C18/16 ,  F04C2210/22 ,  F04C2270/015 ,  F04C2270/195 ,  F04C2270/585

    Abstract: A compressor system includes a screw compressor (48) and a controller (100). The screw compressor includes a slide valve (49) selectively actuatable between a first position and a second position to facilitate modulating a capacity of the screw compressor between fully-loaded and fully-unloaded. The controller is communicably coupled to the slide valve. The controller is configured to receive a chilled fluid temperature setpoint for a fluid in heat transfer communication with a refrigerant of the refrigeration circuit; receive temperature data indicative of a chilled fluid temperature of the fluid; determine a difference between the chilled fluid temperature and the chilled fluid temperature setpoint; and provide one of a load command and an unload command to the slide valve based the difference between the chilled fluid temperature and the chilled fluid temperature setpoint. According to an example embodiment, the controller (100) does not receive feedback from the screw compressor (48) regarding a position of the slide valve (49).

    VARIABLE DISPLACEMENT LUBRICANT PUMP
    10.
    发明申请
    VARIABLE DISPLACEMENT LUBRICANT PUMP 审中-公开
    可变位移润滑泵

    公开(公告)号：US20160252090A1

    公开(公告)日：2016-09-01

    申请号：US15030868

    申请日：2013-10-21

    Applicant: PIERBURG PUMP TECHNOLOGY GMBH

    Inventor： BERNARDO CELATA

    IPC: F04C14/22 ,  F01M1/02 ,  F04C2/344

    CPC classification number: F04C14/22 ,  F01M1/02 ,  F01M2001/0238 ,  F01M2001/0246 ,  F04C2/3442 ,  F04C2/3448 ,  F04C14/223 ,  F04C14/24 ,  F04C2240/10 ,  F04C2240/20 ,  F04C2270/185 ,  F04C2270/585

    Abstract: A variable displacement lubricant pump for providing a pressurized lubricant for an internal combustion engine. The variable displacement lubricant pump includes a shiftable control ring, a pump rotor comprising a plurality of slidable vanes which rotate in the control ring, a hydraulic pressure control comprising a control chamber which comprises a lateral control chamber wall, and a control ring plunger shiftable along the lateral control chamber wall, a first eccentricity limiting opening arranged in the lateral control chamber wall, a second eccentricity limiting opening arranged in the lateral control chamber wall, and an eccentricity limiting control system which connects or disconnects the first eccentricity limiting opening and the second eccentricity limiting opening to atmospheric pressure dependent on a lubricant temperature. The hydraulic pressure control directly actuates and controls an eccentricity of the control ring.

    Abstract translation: 一种用于为内燃机提供加压润滑剂的可变排量润滑剂泵。 可变排量润滑泵包括可移动控制环，泵转子包括在控制环中旋转的多个可滑动叶片，液压控制器包括控制室，该控制室包括侧向控制室壁和可沿着 横向控制室壁，布置在侧向控制室壁中的第一偏心限制开口，布置在横向控制室壁中的第二偏心限制开口以及连接或断开第一偏心限制开口和第二偏心限制开口的偏心限制控制系统 偏心限制取决于润滑剂温度的大气压开启。 液压控制直接启动并控制控制环的偏心度。

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