Having Condition Responsive Pumped Fluid Control Patents (Class 417/213)
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Patent number: 11879449Abstract: The present disclosure includes: a vibrating plate having a piezoelectric body connected to a main surface thereof; a cover including a top plate that faces another main surface of the vibrating plate and that has an opening part, and a side wall connected to an outer peripheral portion of the top plate so as to surround a space between the top plate and the vibrating plate; a support portion connected to the side wall and supports an outer periphery of the vibrating plate; an opening between the side wall and the vibrating plate; and a protrusion on any one out of the top plate, the side wall, and the vibrating plate so as to protrude into the space. The protrusion is provided between the opening part of the top plate and the side wall in a cross section.Type: GrantFiled: May 25, 2021Date of Patent: January 23, 2024Assignee: MURATA MANUFACTURING CO., LTD.Inventor: Nobuhira Tanaka
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Patent number: 11867165Abstract: A drive system for a pump includes a housing, first and second fluid displacement members, and a reciprocating member configured to mechanically displace the first and second fluid displacement members through respective suction strokes. The housing and fluid displacement members define an internal pressure chamber configured to be filled with a working fluid having a charge pressure. The internal pressure chamber is configured such that the working fluid simultaneously exerts the charge pressure on the first and second fluid displacement members.Type: GrantFiled: June 15, 2021Date of Patent: January 9, 2024Assignee: Graco Minnesota Inc.Inventors: Bradley H. Hines, Brian W. Koehn, Jeffrey A. Earles, Paul W. Scheierl, Adam K. Collins
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Patent number: 11773876Abstract: A control valve for a pump for delivering a fluid. The control valve includes: a valve housing which delineates a piston chamber; a piston which can be moved within the piston chamber; and a fluid channel which ports into the piston chamber via a port opening, wherein the port opening defines a port control edge. The valve housing includes a recess which extends into the fluid channel, wherein the recess defines a recess control edge which is axially offset with respect to the port control edge, and/or the piston includes a piston recess which defines a piston recess control edge.Type: GrantFiled: January 27, 2022Date of Patent: October 3, 2023Assignee: Schwäbische Hüttenwerke Automotive GmbHInventors: Stefan Küchle, Thomas Tontsch, Simone Schilling
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Patent number: 11713724Abstract: A dual pump fuel delivery system for an aircraft includes a fixed displacement fuel pump including an inlet and an outlet. The fixed displacement fuel pump is configured to supply a first portion of a fuel demand for the aircraft. A variable displacement fuel pump including an inlet portion and an outlet portion includes a selectively adjustable pump actuator configured to supply a second portion of the fuel demand. The second portion is variable. A fuel demand sensor operates to detect a selected fuel demand. A control member is operatively connected to the fuel demand sensor and the variable displacement fuel pump. The control member being configured to operate to adjust the variable displacement fuel pump to output the second portion of the fuel demand to satisfy the selected fuel demand.Type: GrantFiled: June 21, 2022Date of Patent: August 1, 2023Assignee: HAMILTON SUNDSTRAND CORPORATIONInventors: Morgan O'Rorke, Ryan Prescott Susca, Ryan Shook
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Patent number: 11536265Abstract: The present invention relates to a hydraulic pump system including a variable displacement pump that generates an outlet pressure. The hydraulic pump system also includes a control system that decreases a displacement volume of the variable displacement pump in response to an increase in the outlet pressure and increases a displacement volume of the variable displacement pump in response to a decrease in the outlet pressure.Type: GrantFiled: November 4, 2020Date of Patent: December 27, 2022Assignee: DANFOSS POWER SOLUTIONS II TECHNOLOGY A/SInventors: Don Rulon Draper, Robert Leslie Isaacs
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Patent number: 11434935Abstract: A hydraulic pressure supply device includes: a hydraulic pump capable of changing a discharge capacity; an electric motor capable of changing a rotational frequency; a discharge capacity adjustment mechanism capable of adjusting the discharge capacity of the pump between a maximum and minimum discharge capacity; a pressure detector configured to detect pressure of an operating liquid discharged from the pump; a rotational frequency detector configured to detect the rotational frequency of the motor; and a controller configured to control operations of the motor and adjustment mechanism based on the rotational frequency, detected by the detector, to keep pressure of an actuator at arbitrary pressure, wherein, the controller controls the operation of the adjustment mechanism so the discharge capacity of the pump becomes a set lower limit discharge capacity. The set lower limit discharge capacity is set to be larger than the minimum discharge capacity and be adjustable by the controller.Type: GrantFiled: April 22, 2019Date of Patent: September 6, 2022Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Akihiro Kondo, Hiroaki Mitsui, Toshihisa Toyota, Takashi Nakatsuji
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Patent number: 11384834Abstract: A control system for a hydrostatic drive system can include a hydraulic charge pump circuit having a hydraulic load and a tank. The hydraulic charge pump can be in fluid communication with the hydraulic charge pump circuit. A bypass line can extend to the tank from a junction between the hydraulic charge pump and the hydraulic load. A charge bypass valve can be disposed to control flow through the bypass line. The control system can include a control device configured to determine one or more operational parameters for the power machine and control the charge bypass valve to allow flow through the bypass line, from the hydraulic charge pump to the tank, based on the determined operational parameters during a starting operation.Type: GrantFiled: December 21, 2020Date of Patent: July 12, 2022Assignee: CLARK EQUIPMENT COMPANYInventors: Douglas Kallas, Charles Young
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Patent number: 11365727Abstract: A failure diagnosing device configured to diagnose failure of a swash plate pump includes: a history acquiring portion configured to acquire actual history data, the actual history data indicating a time-lapse change of the suction flow rate or suction pressure in a predetermined period of time; and a failure detecting portion configured to detect generation of an abnormality between a piston and a shoe based on the actual history data acquired by the history acquiring portion.Type: GrantFiled: July 27, 2018Date of Patent: June 21, 2022Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Tadahiko Kuroda, Takayuki Masuda, Takeshi Matsuura, Yuki Kato
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Patent number: 11339773Abstract: A spool operation failure due to foreign matter contamination is prevented. A variable displacement compressor 100 includes a first control valve 300 controlling the opening degree of a supply passage 145, a check valve 350, a second control valve 400 controlling the opening degree of a discharge passage 146, and a back-pressure relief passage 147. The second control valve 400 includes a back pressure chamber 410 communicating with an intermediate supply passage 145b1, a valve chamber 420 to which a valve hole 103d and a discharge hole 431a are open and that constitutes a part of the discharge passage 146, a partition member 430 partitioning into the back pressure chamber 410 and the valve chamber 420, and a spool 440 extending through a through hole 432a formed in the partition member 430. The spool 440 has a pressure receiving portion 441 disposed in the back pressure chamber 410, a valve portion 442 disposed in the valve chamber 420, and a shaft portion 443.Type: GrantFiled: June 18, 2018Date of Patent: May 24, 2022Assignee: SANDEN AUTOMOTIVE COMPONENTS CORPORATIONInventors: Kenji Sugino, Yukihiko Taguchi
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Patent number: 11326592Abstract: A method for operating a hydraulic consumer on an electrically actuated control valve includes providing the valve with an open valve position for establishing a connection between a valve inlet and a pilot line for influencing a pivot angle set on an axial piston pump and a system pressure which is present at the valve inlet and dependent on the pivot angle. Data regarding the current system pressure and the current pivot angle are detected and communicated to a control unit. The method includes determining an incorrect setting of the control valve if the control unit detects that a delivery volume flow of the axial piston pump is smaller than a value to be expected based on valve position, or the control unit detects that the system pressure present at the valve inlet is at a maximum without a delivery volume flow flowing in the direction of the hydraulic consumer.Type: GrantFiled: July 18, 2019Date of Patent: May 10, 2022Assignee: DEERE & COMPANYInventors: Andreas Remmelmann, Christian Brueser
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Patent number: 10995974Abstract: A compressor may include a shell assembly, a compression mechanism and a conduit. The shell assembly may include a fitting through which fluid is received from outside of the compressor. The compression mechanism may be disposed within a chamber defined by the shell assembly. The conduit may extend through the chamber between the fitting and a suction inlet of the compression mechanism and transmit at least a portion of the fluid from the fitting to the suction inlet. The conduit may include an inlet that may be spaced apart from the fitting and an outlet that may engage the compression mechanism.Type: GrantFiled: October 8, 2018Date of Patent: May 4, 2021Assignee: Emerson Climate Technologies, Inc.Inventors: Matthew Thomas Piscopo, Brian L. Reid
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Patent number: 10961998Abstract: A control arrangement controls a position of a swashplate in an axial piston pump between a no-stroke position and a maximum stroke position. The control arrangement includes a servo spool mounted for limited sliding movement in a compensator piston cylinder. A solenoid coil is configured to provide a coil force to move the servo spool. A compensator piston is mounted in the compensator piston cylinder in response to movement of the servo spool. A spring between the servo spool and the compensator piston provides a spring force in response to the coil force applied to the servo spool. The control arrangement defines a feedback system configured to maintain a balancing relationship between the spring and coil forces to enable infinite control of the swashplate position.Type: GrantFiled: March 8, 2018Date of Patent: March 30, 2021Assignee: Hartmann Controls, Inc.Inventor: Donald G. Bethke
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Patent number: 10900506Abstract: A construction machine includes: one or more hydraulic pumps discharging a working fluid; an engine supplying a rotational power to the hydraulic pumps; a hydraulic line through which the working fluid discharged by the hydraulic pumps moves; a main control valve provided on the hydraulic line and controlling supply of the working fluid to a traveling device or one or more of various working devices, which require the working fluid; a bypass cut valve provided on the hydraulic line at a lower side thereof than the main control valve to open and close the hydraulic line; an automatic warm-up switch generating a warm-up operation signal for raising a temperature of the working fluid before an operation starts; and a control device performing a warm-up operation for increasing the number of revolutions of the engine and opening the bypass cut valve to increase a flow rate along the hydraulic line, when the warm-up operation signal is received from the automatic warm-up switch.Type: GrantFiled: December 20, 2017Date of Patent: January 26, 2021Assignee: DOOSAN INFRACORE CO., LTD.Inventor: Tae Yoon Kim
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Patent number: 10890174Abstract: A hydrostatic system that provides different volumetric efficiency at different states and includes a pump with a discharge and supply line. Connected between the discharge and supply line is a valve. The valve is adapted to move to a position having a cross port orifice when the pump is in a neutral state and a position where the ports are blocked when the pump is in an operation state.Type: GrantFiled: December 12, 2018Date of Patent: January 12, 2021Assignee: Danfoss Power Solutions Inc.Inventor: Joshua Cronbaugh
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Patent number: 10865890Abstract: A control valve including: a valve housing including a piston space; and a control piston which is movably arranged in the piston space and sub-divides the piston space into at least a first valve space and a second valve space, the control valve including at least a leakage path which sets a desired leakage between the first valve space and the second valve space. A motor vehicle device including an adjustable rotary pump including an adjusting means, for adjusting a delivery volume of the rotary pump, and the control valve, using which a pressure for adjusting the adjusting means can be governed, the motor vehicle device including a means which presses the control piston into a first position and holds it there, and the at least one other inlet of the control valve is connected to a high-pressure side of the rotary pump when the rotary pump is in operation.Type: GrantFiled: June 5, 2018Date of Patent: December 15, 2020Assignee: SCHWÄBISCHE HÜTTENWERKE AUTOMOTIVE GMBHInventors: Sven Peters, Andreas Scheidemann, Lothar Preisler
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Patent number: 10801533Abstract: A fluid pressure circuit for controlling a rod of a cylinder controlled in accordance with an operation command includes a tank, a fluid pressure actuator configured to pressurize fluid supplied from the tank for extending and retracting the cylinder, a flow control valve arranged between the fluid pressure actuator and the cylinder device configured to switch a flow passage of pressurized fluid and discharge via a first throttle return fluid from the cylinder, a variable regeneration switching valve configured to discharge return fluid from the cylinder to the flow control valve upon non-regeneration and upon regeneration, branch part of the return fluid and discharge via a second throttle the fluid branched, a regenerative motor configured for regeneration by fluid branched by the variable regeneration switching valve, and a third throttle connected in series with the first throttle upon the regeneration to limit flow of return fluid.Type: GrantFiled: February 6, 2018Date of Patent: October 13, 2020Assignee: EAGLE INDUSTRY CO., LTD.Inventor: Yoshiyuki Shimada
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Patent number: 10648468Abstract: An adjustable vane pump, in particular an oil pressure pump, with a suction side and a pressure side, with a housing and a rotor supported in the housing so as to be rotatable about a rotor axis. At least one vane is supported for movement in a radial direction. The housing comprises a housing floor and a housing cover transversely to the rotor axis, and an adjustment cage is arranged between the housing floor and the housing cover.Type: GrantFiled: May 12, 2017Date of Patent: May 12, 2020Assignee: Joma-Polytec GmbHInventors: Thomas Gulde, Andreas Blank, Michael Walter, Ralph Buehler, Torsten Helle
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Patent number: 10605238Abstract: A compressor includes a cylinder housing having a number of pistons, a control chamber communicating with piston casings, a suction chamber and a discharge chamber communicating with the piston casings, a control valve includes a receptacle engaged in the cylinder housing, a valve member engaged in the receptacle for controlling the pressurized air to flow from the discharge chamber into the control chamber of the cylinder housing, and a valve element for controlling a bypass of the pressurized air through the receptacle. A bellow device is connected to actuate the sliding member internally, and a sliding member is slidably engaged in the control space of the receptacle, and to operate the valve element externally with a solenoid device.Type: GrantFiled: October 23, 2017Date of Patent: March 31, 2020Inventor: Henry C. Chu
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Patent number: 10605151Abstract: A strategy for controlling an electric pump and control valve in an internal combustion engine cooling system compensates for backpressure variations and maintains system operation within design parameters. The method comprises the steps of measuring the coolant temperature, measuring the electrical current and voltage to the pump motor, determining the pump speed and coolant flow, determining the desired coolant flow, determining a negative correction to the flow control valve and pump if desired flow is less than present coolant flow and determining a positive correction to the flow control valve and pump if desired flow is more than present coolant flow and undertaking this correction to coolant flow. Thus, based upon inferred back pressure in the engine coolant system from the data relating to the pump energy input, proper coolant flow, heat rejection and engine operating temperature can be maintained in spite of variations in system flow restrictions and backpressure.Type: GrantFiled: June 9, 2016Date of Patent: March 31, 2020Assignee: GM Global Technology Operations LLCInventors: Eugene V. Gonze, Sergio Quelhas, Vijay A. Ramappan, Michael J. Paratore, Jr.
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Patent number: 10571171Abstract: Systems and methods that detect a loss of charge associated with a climate controlled environment are described in the present disclosure. In various embodiments, a controller receives operating condition parameters associated with a climate-controlled environment. The controller determines whether a compressor is operating in a first mode of operation or a second mode of operation. The controller applies a first model to the operating condition parameters when the compressor is operating in the first mode of operation to represent a loss of charge associated with the climate-controlled environment and applies a second model to the operating condition parameters when the compressor is operating in the second mode of operation to represent the loss of charge associated with the climate-controlled environment.Type: GrantFiled: January 24, 2018Date of Patent: February 25, 2020Assignee: Emerson Climate Technologies, Inc.Inventors: Mark Gariety, Paul L. Fullenkamp, Fadi M. Alsaleem
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Patent number: 10487855Abstract: A fluid power system includes an electro-hydraulic variable displacement fluid pump driving fluid at a first displacement value. The system further includes a directional control valve, a sensor, and a controller. The directional control valve includes a valve member movable between a neutral position and at least one actuated position. The directional control valve diverts at least some fluid to an actuator while the valve member is in an actuated position, and the directional control valve exhausts fluid at an exhaust pressure through an outlet port to the fluid reservoir while the valve member is in the neutral position. The sensor measures a difference between the exhaust pressure and a nominal pressure and generates a signal based on the measured difference. The controller generates a flow command at least partially based on the pressure signal to modify the operation of the pump to drive fluid at a second displacement value.Type: GrantFiled: June 1, 2017Date of Patent: November 26, 2019Assignee: DEERE & COMPANYInventor: Kristen D. Cadman
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Patent number: 10233951Abstract: A system and method for detecting uncommanded positioning of at least one valve spool in a plurality of valve spools and for stopping fluid flow to a plurality of hydraulic actuators fluidly connected to the plurality of valve spools is disclosed. The method may comprise receiving a signal fluid pressure detected in a signal passageway, identifying whether at least one activation command is currently enabled, and stopping the flow of fluid to the plurality of hydraulic actuators if no activation command is enabled for any of the plurality of valve spools, and the signal fluid pressure when detected (1) upstream of the plurality of valve spools is greater than a first threshold or (2) downstream of the plurality of valve spools is less than a second threshold.Type: GrantFiled: October 5, 2016Date of Patent: March 19, 2019Assignee: Caterpillar Inc.Inventors: David J. Lomax, Joshua D. Callaway
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Patent number: 10227090Abstract: A hydraulic drive system includes: control valves; solenoid proportional valves outputting pilot pressures to the control valves; a controller controlling each of the solenoid proportional valves; a primary pressure line leading hydraulic oil from an auxiliary pump to the solenoid proportional valves; a solenoid switching valve provided on the primary pressure line; a movement detection line blocked when any of movement detection target control valves has moved; and a movement detection pressure sensor provided on the movement detection line. The controller controls the solenoid switching valve while all of operation devices are outputting electrical signals indicating that their operating levers are in neutral, such that: the solenoid switching valve opens the primary pressure line if a measurement value of the pressure sensor is less than a threshold; and the solenoid switching valve blocks the primary pressure line if the measurement value of the pressure sensor is greater than the threshold.Type: GrantFiled: December 9, 2016Date of Patent: March 12, 2019Assignee: KASAWAKI JUKOGYO KABUSHIKI KAISHAInventor: Akihiro Kondo
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Patent number: 9803665Abstract: A control system for a machine is disclosed. The control system may have a bypass passage situated to allow fluid to bypass an actuator, and a warmup valve disposed within the bypass passage that is movable between flow-passing and-blocking positions. A controller is configured to move the warmup valve to the flow-passing position, fix a displacement position of the pump, compare the pressure of the fluid of the actuator with a threshold, and move the warmup valve to the flow-blocking position and reduce a pump outlet pressure when the pressure of the fluid is greater than the threshold. The controller may be configured to move the warmup valve to the flow-passing position, fix a displacement position of the pump, and adjust an input speed of the pump in response to the signal.Type: GrantFiled: March 17, 2015Date of Patent: October 31, 2017Assignee: Caterpillar Inc.Inventors: Matthew J. Beschorner, Eric Hughes, Naoto Funabiki, Tomohiro Oyama, Brett J. Janson
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Patent number: 9777464Abstract: A load sense open center hydraulic system provides efficiency and operator feedback and includes one or more constant flow-open center valves (218); respective one or more parallel power cores (238) operatively coupled to the one or more constant flow-open center valves; a variable capacity pump (246) directly fluidly connected to the one or more parallel power cores; and a pressure compensated flow control fluidly connected between the variable capacity pump and the one or more constant flow-open center valves. The one or more constant flow-open center valves are not fluidly coupled to a fixed capacity pump.Type: GrantFiled: February 18, 2014Date of Patent: October 3, 2017Assignee: Parker-Hannifin CorporationInventors: Jarmo Harsia, Patrick Stegemann
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Patent number: 9732773Abstract: A drive system for hydraulically driven working mechanisms of a working machine includes an axial piston pump, the pump capacity and flow direction of which is varied by changing the pivot angle of the axial piston pump. The drive system includes a hydraulic motor connected via a line to the axial piston pump and drivably connected to the working mechanisms, a control unit operated to set the pump capacity of the axial piston pump to zero and a control valve arrangement that is actuated by the control unit to actuate a limiting device such that the pivot angle of the axial piston pump can be mechanically set to zero degrees (0°).Type: GrantFiled: September 17, 2014Date of Patent: August 15, 2017Assignee: CLAAS Selbstfahrende Erntemaschinen GmbHInventors: Heinrich Dueckinghaus, Heinrich Schneider, Dirk Schlichting
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Patent number: 9726158Abstract: A swash plate type piston pump includes a plurality of pistons, a cylinder block including a plurality of cylinders for housing the pistons, a swash plate for reciprocating the pistons to expand and contract volume chambers of the cylinders with the rotation of the cylinder block, a biasing mechanism for biasing the swash plate in a direction to increase a tilting angle, a first control pin for driving the swash plate in a direction to reduce the tilting angle according to a first load pressure, and a second control pin for driving the swash plate in a direction to reduce the tilting angle according to a second load pressure. The first and second control pins are connected in series.Type: GrantFiled: November 21, 2012Date of Patent: August 8, 2017Assignee: KYB CorporationInventor: Tetsuya Iwanaji
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Patent number: 9651046Abstract: A variable capacity vane pump (20) is provided having a pump control ring (44) that is moveable to alter the capacity of the pump (20). A control chamber (60) is formed between the pump casing (22) and the control ring (44). The control chamber (60) is operable to receive pressurized fluid to create a force to move the control ring (44) to reduce the volumetric capacity of the pump (20). A primary return spring (56) acts between the control ring (44) and the casing (22) to bias the control ring (44) towards a position of maximum volumetric capacity. A shaft is coupled at one end to the control ring and a second end of the shaft is positioned a predetermined distance from the casing (22). A secondary return spring (62) is mounted about the shaft and is configured to engage the control ring (44) after the control ring (44) has moved a predetermined amount. The secondary return spring (62) biases the control ring (44) towards a position of maximum volumetric capacity.Type: GrantFiled: April 4, 2014Date of Patent: May 16, 2017Assignee: MAGNA POWERTRAIN INCInventors: Matthew Williamson, Manmohan Sehmby, Cezar Tanasuca, Karthikeyan Ganesan
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Patent number: 9441747Abstract: A pressure/flow regulator includes a pressure control valve, a flow control valve, and a first control connection configured to set a variable displacement pump. The control connection is configured to be discharged to a tank by the flow control valve via a control edge of the pressure control valve that is open in the idle position of a valve piston of the pressure control valve.Type: GrantFiled: March 30, 2011Date of Patent: September 13, 2016Assignee: Robert Bosch GmbHInventors: Christian Spielvogel, Friedemann Nordt, Carola Diebold
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Patent number: 9410514Abstract: In a variable displacement oil pump employing a return spring for forcing a cam ring in a clockwise direction, and a control chamber configured to displace the cam ring in a counterclockwise direction with a discharge pressure introduced thereto, a pilot valve is provided to selectively switch between an oil-discharge from the control chamber and an oil-introduction to the control chamber by moving a spool in one direction by a biasing force of a valve spring or by moving the spool in the other direction against the biasing force by the discharge pressure and applied at an oil introduction port of the pilot valve. Also provided is an electromagnetic valve configured to variably control timing at which switching between the oil-discharge and the oil-introduction occurs, with respect to the discharge pressure applied at the oil introduction port, by appropriately changing the preload setting of the valve spring.Type: GrantFiled: March 28, 2013Date of Patent: August 9, 2016Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventor: Yasushi Watanabe
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Patent number: 9323253Abstract: A pump control assembly having a flow control assembly disposed between the first end of a load sensing valve and a fluid pump is disclosed. The flow control assembly may include an orifice, a first valve assembly, and a second valve assembly. When the first valve assembly is in an open position and the second valve assembly is in a first position, fluid passing through the orifice is directed to a fluid reservoir and to the load sensing valve. When the first valve assembly is in a closed position and the second valve assembly is in a second position, all fluid passing through the orifice is directed to the load sensing valve. An electronic controller can be configured to transmit an output current to the first and second valve assemblies in response to an operational parameter of a prime mover supplying power to the fluid pump.Type: GrantFiled: December 20, 2013Date of Patent: April 26, 2016Assignee: Eaton CorporationInventor: Philip James Dybing
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Patent number: 9222378Abstract: A cam phaser includes a rotor, a stator, and a cover. The rotor defines a first hole and a second hole and can rotate relative to the stator between a first intermediate position and a second intermediate position. The cover is mounted on the stator and defines a first lock pin seat and a second lock pin seat. The cam phaser includes a first lock pin and a second lock pin. The first lock pin can move along the first hole and into the first lock pin seat to lock the rotor relative to the stator at the first intermediate position. The second lock pin can move along the second hole and into the second lock pin seat to lock the rotor relative to the stator at the second intermediate position.Type: GrantFiled: July 15, 2013Date of Patent: December 29, 2015Assignee: GM Global Technology Operations LLCInventors: William P. Vukovich, Gerald R. Stabel
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Patent number: 9097251Abstract: A variable-displacement lubricant pump for providing a pressurized lubricant includes a rotor with at least one radially slidable vane configured to rotate in a shiftable stator ring. A first plunger is configured to push the shiftable stator ring into a high pumping volume direction. A pressure control system is configured to control a lubricant discharge pressure of the pressurized lubricant. The pressure control system comprises a first control chamber with the first plunger being configured to move in an axial direction and a side wall. A pump outlet port is connected to the first control chamber via a first pressure conduit. A movable outlet opening is disposed in the side wall of the first control chamber, is connected to a low pressure, and is configured to move with an axial projection and to be actuated by a thermostatic element. The first plunger can cover and close the movable outlet opening.Type: GrantFiled: June 16, 2010Date of Patent: August 4, 2015Assignee: PIERBURG PUMP TECHNOLOGY GMBHInventor: Jerome Maffeis
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Patent number: 9033679Abstract: A displacement control system (A) of a variable displacement compressor sets a target for pressure in an intake chamber or a crank chamber, on the basis of a detected evaporator-outlet air temperature and a target for evaporator-outlet air temperature. The pressure of a refrigerant in a high-pressure section is detected, and a regulating current is supplied to a solenoid (316) of a displacement control valve, on the basis of the pressure of the refrigerant in the high-pressure section and the target for pressure.Type: GrantFiled: February 7, 2008Date of Patent: May 19, 2015Assignee: SANDEN CORPORATIONInventors: Yukihiko Taguchi, Yoshihiro Ochiai
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Publication number: 20150132152Abstract: A pump system for movement of fluids having a reciprocating piston power pump having at least three reciprocating pistons operable to displace fluid from a housing having a pumping chamber, an integrally forged crankshaft operably connected to the pistons, at least one sensor operable to sense ambient conditions on the pump, and a computer control for processing data from the sensor to regulate the operation of the pump in response to the data. The system also utilizes protective infused treatments for lubricity and enhanced lubrication sprayers and a reset relief valve and pressure sensors operably connected to the computer system for control and monitoring of the pump.Type: ApplicationFiled: January 20, 2015Publication date: May 14, 2015Inventor: Gerard S. Lazzara
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Publication number: 20150118072Abstract: A high pressure pumping system in which a first pump delivers a medium to a discharge port and to a second pump which subsequently delivers the medium to the discharge port.Type: ApplicationFiled: May 8, 2013Publication date: April 30, 2015Inventor: Jarmo Uolevi LEPPANEN
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Patent number: 9010138Abstract: A variable displacement compressor adjusts the pressure in a control pressure chamber and controls the displacement in accordance with the adjusted pressure. Refrigerant is supplied via a supply passage, and released via a bleed passage. The compressor includes a first control valve for adjusting the cross-sectional area of the supply passage for refrigerant. The compressor further includes a second control valve that adjusts the cross-sectional area of the bleed passage in accordance with the opening/closing state of the first control valve. The second control valve adjusts the cross-sectional area of the bleed passage such that the cross-sectional area when the first control valve is in the closed state is larger than that when the first control valve is in the opened state. The back pressure chamber is located in a section of the bleed passage that is located between the second control valve and the control pressure chamber.Type: GrantFiled: March 28, 2012Date of Patent: April 21, 2015Assignee: Kabushiki Kaisha Toyota JidoshokkiInventors: Hiroyuki Yoshida, Osamu Hiramatsu
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Publication number: 20150078922Abstract: A high pressure pump includes a pump body, a pressurizing chamber, a fuel passage, a union, a seat member, a relief valve seat, a relief valve, a discharge valve seat, a discharge valve, a spring and a spring holder. The union has an inner threaded portion and a step portion formed on an inner wall of the union. The seat member includes a relief passage that extends through the seat member in an axial direction of the seat member and a discharge path that is not in fluid communication with the relief passage. The one opening of the relief passage is closer to the pressurizing chamber than an other opening of the relief passage is to the pressurizing chamber. The one opening of the discharge path is further from the pressurizing chamber than an other opening of the discharge path is from the pressurizing chamber. The seat member is pressed toward the step portion when the spring holder is fastened to the union by engaging the inner threaded portion with the outer threaded portion.Type: ApplicationFiled: August 22, 2014Publication date: March 19, 2015Inventors: Shinobu OIKAWA, Masatoshi KUROYANAGI
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Publication number: 20150044065Abstract: A variable displacement swash plate type compressor includes a displacement control valve. The displacement control valve includes a drive force transmitting member, a valve member having a first valve body, a valve chamber, which accommodates the first valve body, an accommodating chamber, which communicates with a control pressure chamber, a pressure sensing mechanism, which adjusts the valve opening degree of the first valve body, a communicating chamber, which is located on the opposite side of the pressure sensing mechanism from the valve chamber, and a second valve body, which is located in the pressure sensing mechanism and selectively opens and closes the communicating chamber. When the current supply to the electromagnetic solenoid is stopped and the pressure in the suction pressure zone in the communicating chamber is higher than a predetermined pressure, the pressure sensing mechanism contracts to open the second valve body.Type: ApplicationFiled: July 31, 2014Publication date: February 12, 2015Inventors: Masaki OTA, Yusuke YAMAZAKI, Takahiro SUZUKI, Kei NISHII, Hiromichi OGAWA
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Publication number: 20150037173Abstract: Described are a method and a device for activating an electric vacuum pump for a brake booster of a vehicle. The brake booster is supplied with a vacuum from a vacuum reservoir. The vacuum pump is designed to increase the vacuum in the vacuum reservoir as soon as the vacuum drops below a predefinable switch-on threshold. In order to avoid unnecessarily frequent switching on of the vacuum pump, which may irritate the driver, an expected decrease of the vacuum in the vacuum reservoir as a result of an instantaneous braking operation is estimated and the switch-on threshold of the vacuum pump is temporarily reduced if the vacuum instantaneously prevailing in the vacuum reservoir minus the estimated vacuum decrease is greater than a predetermined adjustment point vacuum, below which the brake booster can no longer act in a sufficiently boosting manner.Type: ApplicationFiled: September 18, 2012Publication date: February 5, 2015Inventor: Thomas BRUEX
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Publication number: 20150019078Abstract: An electric actuator-integrated electric power steering system may include an integrated motor which provides rotational force, a hydraulic pump connected to one end of the integrated motor and supplied with the rotational force from the integrated motor to pump working fluid that is used to transmit steering force, and an electric actuator connected to the other end of the integrated motor via a power controlling means. The electric actuator may operate when the rotational force is transmitted to the electric actuator and whether the rotational force from the integrated motor is transmitted to or cut off from the electric actuator may depend on an operation of the power controlling means.Type: ApplicationFiled: June 10, 2014Publication date: January 15, 2015Applicant: Hyundai Motor CompanyInventors: Dae Suk JUNG, Soo Bo PARK
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Patent number: 8935009Abstract: A method and apparatus for controlling discharge pressure and pump displacement of a plurality of variable displacement hydraulic pumps having connected discharge ports is provided. Each pump includes a swashplate and a control valve for controlling an angle of inclination of the swashplate. A desired first pump displacement control law is determined for a first pump and determined a desired second pump discharge pressure control law for a second pump. The first control law is used to determine a first intermediate control variable. The second control law is used to determine a second intermediate control variable. The control of the first and second pumps are combined using the first and second intermediate control variables. A desired first control valve setting for the control valve of the first pump is determined using the combined first and second intermediate control variables and the first control law.Type: GrantFiled: May 6, 2011Date of Patent: January 13, 2015Assignee: Caterpillar Inc.Inventors: Hongliu Du, Patrick W. Sullivan
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Publication number: 20150004010Abstract: A control valve is configured such that a suction pressure, which is used to displace a sub-valve element in a valve opening direction after a main valve has been closed, is varied according to a value of current supplied to a solenoid. A crankcase communication port, which communicates with a crankcase of a compressor, and a suction chamber communication port, which communicates with a suction chamber of the compressor, are provided in a body. A sub-valve chamber whose diameter is larger than that of the main valve hole is formed between the crankcase communication port and a main valve hole, and a sub-valve is placed in the sub-valve chamber.Type: ApplicationFiled: June 18, 2014Publication date: January 1, 2015Inventors: Shinji Saeki, Masaaki Tonegawa
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Publication number: 20140377086Abstract: An air-driven pump system comprising: a directional unit that defines a directional air chamber and comprises a directional piston, a first process air intake, and a second process air intake; two pump units each including a liquid chamber, an air chamber, and a piston; a shaft affixed to the pistons; an efficiency valve system comprising an efficiency piston, wherein the efficiency unit is configured to divide inlet air entering the air-driven piston pump into control air, first process air, and second process air, and wherein the efficiency piston is in communication with the control air, first process air, and second process air before the air is distributed to the directional unit; and a second shaft which is in communication with the efficiency piston. The efficiency valve system is to prevent overfilling of the air chambers.Type: ApplicationFiled: September 5, 2014Publication date: December 25, 2014Applicant: WILDEN PUMP AND ENGINEERING LLCInventor: CARL J. GLAUBER
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Publication number: 20140369853Abstract: A controller for a vehicle pneumatic system loads a compressor responsive to engine power absorption by the engine and air storage facility air pressure readings up to a pressure limit. The controller is responds to power demand on the engine in excess of an engine speed related global maximum and air pressure readings down to a global minimum for unloading the compressor. The controller provides for loading and unloading the compressor to maintain storage facility pressure within an operating maximum and an operating minimum which lie between the global maximum and global minimum pressures. The controller responds to air pressure readings reaching or falling below the global minimum for loading the compressor and to air pressure readings reaching or exceeding the global maximum for unloading the compressor.Type: ApplicationFiled: January 18, 2012Publication date: December 18, 2014Applicant: International Engine Intellectual Property Company, LLCInventors: Grzegorz Siuchta, Dean Alan Oppermann, Raul Espinosa Raul Espinosa
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Patent number: 8899942Abstract: A system and method for controlling the volume ratio of a compressor is provided. The system can use a port (88) or ports in a rotor cylinder to bypass vapor from the compression chamber to the discharge passage of the compressor. A control valve (90) can be used to open or close the port or ports to obtain different volume ratios in the compressor. The control valve (90) can be moved or adjusted by one or more valves that control a flow of fluid to the valve. A control algorithm can be used to control the one or more valves to move the control valve to obtain different volume ratios from the compressor. The control algorithm can control the one or more valves in response to operating parameters associated with the compressor.Type: GrantFiled: September 14, 2011Date of Patent: December 2, 2014Assignee: Johnson Controls Technology CompanyInventors: William L. Kopko, Paul Nemit, Jr., Angela Marie Comstock
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Publication number: 20140341710Abstract: A refrigerant compressor (10) for use in a chiller-heater system that can provide chilled water at less than 10° C. and hot water at more than 80° C. without the need for additional heat input, the compressor (10) being configured to provide a compression ratio of at least 18:1 and a temperature lift across the compressor of at least 80K, and the refrigerant fluid being selected to give the desired temperature lift without the pressure at the compressor outlet exceeding 25 bar.Type: ApplicationFiled: December 20, 2012Publication date: November 20, 2014Inventor: Michael Creamer
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Publication number: 20140311139Abstract: A hydrostatic variable displacement pump (2) has a displacement volume set by an electro-hydraulic control device (10) provided with a safety function. In a fault scenario, the variable displacement pump (2) is set to a neutral position. The electro-hydraulic control device (10) has a single electro-hydraulic setpoint encoder (30) to specify the setpoint of the displacement volume of the variable displacement pump (2) and an electrically actuatable valve device (35) connected in series downstream of the setpoint encoder (30), by which the direction of displacement of the variable displacement pump (2) is controlled and which is provided with the safety function.Type: ApplicationFiled: February 28, 2014Publication date: October 23, 2014Applicant: Linde Hydraulics GmbH & Co. KGInventors: Rolf Lasaar, Markus Jung
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Publication number: 20140294606Abstract: An Automatic Fuel Additive Controller and Dispenser has been disclosed. In one implementation a pump is used to purge a hydrostatic sensing tube of liquid prior to measurement.Type: ApplicationFiled: March 27, 2014Publication date: October 2, 2014Inventor: Perry Anderson
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Publication number: 20140294610Abstract: A peristaltic pump (1) for pumping a liquid comprises a flexible tube (2) for guiding the liquid to be pumped, a compression means (5) being actuatable for compressing the flexible tube (2), an upstream valve means (3) arranged in an upstream direction with respect to the compression means (5) and being actuatable to selectively open or close the flexible tube (2) upstream of the compression means (5), and a downstream valve means (4) arranged in a down-stream direction with respect to the compression means (5) and being actuatable to selectively open or close the flexible tube (2) downstream of the compression means (5). A drive shaft (6) is provided which is rotatable for periodically actuating the compression means (5), the upstream valve means (3) and the downstream valve means (4).Type: ApplicationFiled: October 16, 2012Publication date: October 2, 2014Inventors: Sebastien Labarthe, Jean-Baptiste Berthier