With Working Fluid Bias Patents (Class 418/26)
  • Patent number: 10458239
    Abstract: This oil pump includes a first volume-changing part provided between an inner rotor and an outer rotor and a second volume-changing part provided in the outer rotor. A plurality of outer rotor pieces, which is annularly connected to each other, of the outer rotor is circumferentially arranged in a state where a first engaging part and a second engaging part of the outer rotor pieces being adjacent to each other engage with each other such that a distance therebetween in a circumferential direction is variable.
    Type: Grant
    Filed: September 25, 2015
    Date of Patent: October 29, 2019
    Assignee: AISIN SEIKI KABUSHIKI KAISHA
    Inventor: Mitsuru Terada
  • Patent number: 10267310
    Abstract: A variable capacity pump includes a control ring moveable within a pump chamber to alter the volumetric capacity of the pump. First and second control chambers individually receive pressurized fluid to create forces to bias the control ring in a predetermined direction. A return spring urges the control ring toward a maximum volumetric capacity pump position. The control ring connects and disconnects the second control chamber from a source of pressurized fluid based on a position of the control ring. Forces from the control chambers and the spring act in combination with one another or against one another and against the spring force to establish first and second equilibrium pressures based on a pressurized or vented condition of the second control chamber.
    Type: Grant
    Filed: April 13, 2015
    Date of Patent: April 23, 2019
    Assignee: MAGNA POWERTRAIN INC.
    Inventors: Cezar Tanasuca, David R. Shulver, Hans Jürgen Lauth
  • Patent number: 10041350
    Abstract: A hydrostatic positive displacement machine has a cam ring for adjusting the displacement volume thereof. This cam ring is guided in translation by approximately diametrically arranged outer circumferential surface segments on associated inner surface segments of a housing of the positive displacement machine.
    Type: Grant
    Filed: October 23, 2015
    Date of Patent: August 7, 2018
    Assignee: Robert Bosch GmbH
    Inventors: Ulrich Gordon Mohn, Heiko Erlenkeuser, Martin Buck, Rene Scheerer
  • Patent number: 9909585
    Abstract: Disclosed is a pump having adjustable conveying volumes, in particular a vane, roller-cell or pendulum-slide pump, comprising a rotation assembly, a lifting ring and a rotationally driven rotor with extendable and retractable vanes, rollers or pendulum sliders that are guided in slots.
    Type: Grant
    Filed: September 3, 2013
    Date of Patent: March 6, 2018
    Assignee: MAGNA POWERTRAIN BAD HOMBURG GMBH
    Inventor: Thilo Mauser
  • Patent number: 9909584
    Abstract: A lubricant vane pump for providing a pressurized lubricant for an internal combustion engine includes a pump housing enclosing a pumping cavity comprising a charge zone and a discharge zone. A shiftable control ring envelops the pumping cavity. A pump rotor comprising vanes divides the pumping cavity into pumping chambers. The pump rotor is radially slidable and rotates in the control ring from the charge zone to the discharge zone. A spring chamber comprises a pretensioning element which pushes the control ring to a high pumping volume direction. A control chamber is configured so that a lubricant pressure in the control chamber moves the control ring to a low pumping volume direction against a force of the pretensioning element. A pumping cavity outlet port is connected to the control chamber. A pressure equilibration channel drains the lubricant from the pumping chamber in the discharge zone into the spring chamber.
    Type: Grant
    Filed: December 20, 2012
    Date of Patent: March 6, 2018
    Assignee: PIERBURG PUMP TECHNOLOGY GMBH
    Inventors: Mirco Simoni, Nicola Celata, Maurizio Moriglia
  • Patent number: 9856866
    Abstract: An oil-free compressor for a rail vehicle includes a multi-piece compressor housing, a first piston cylinder supported in a first opening in the compressor housing, a second piston cylinder supported in a second opening in the compressor housing, and a multi-piece crankshaft assembly supported by the compressor housing. The crankshaft assembly is linked to pistons of the first and second piston cylinders by respective connecting rods. The connecting rods connect to a wrist pin associated with each of the pistons, and the wrist pins are respectively supported by a dry lubricant bushing to the associated piston. The compressor housing may have at least a first housing portion and a second housing portion. The first housing portion and the second housing portion may form respective halves of the compressor housing that are secured together with mechanical fasteners.
    Type: Grant
    Filed: January 16, 2012
    Date of Patent: January 2, 2018
    Assignee: Wabtec Holding Corp.
    Inventors: Roland S. Moore, Michael V. Kazakis, Antione T. Ford, Murtaza R. Dossaji
  • Patent number: 9845681
    Abstract: The invention relates to a vacuum pump for a motor vehicle, comprising a pump housing surface, on which a noise reduction hood delimiting a sound damping volume is mounted. The invention is characterized in that a multi-functional decoupling element is located between the pump housing surface and the noise reduction hood, said element carrying out a sealing function and a valve function in addition to a sound decoupling function.
    Type: Grant
    Filed: October 25, 2013
    Date of Patent: December 19, 2017
    Assignee: Magna Powertrain Bad Homburg GmbH
    Inventors: Daniel Ziehr, Freddy Schönwald, Carsten Sczesny, Benjamin Pyrdok, Dietmar Moeser
  • Patent number: 9828991
    Abstract: A variable displacement vane pump includes a notch portion which is a flow path provided to extend from an initiating end of a discharge port towards a terminating end side of a suction port. The notch portion is formed so that a sectional area of the flow path is smaller than a sectional area of the discharge port at the initiating end thereof and that a length of the flow path in a circumferential direction is 1.5 pitches or larger. The terminating end of the suction port is a point where the vane in the suction area last overlaps the suction port. The initiating end of the discharge port is a point where the vane departed from the suction area first overlaps the discharge port. One pitch is a distance defied in the circumferential direction between adjacent vanes of the plurality of vanes.
    Type: Grant
    Filed: March 17, 2015
    Date of Patent: November 28, 2017
    Assignee: HITACHI AUTOMOTIVE SYSTEMS STEERING, LTD.
    Inventors: Satoshi Muramatsu, Yutaka Ogiwara, Masaaki Aoki, Norikazu Kumasaka, Yoshiaki Kido
  • Patent number: 9752576
    Abstract: A variable flow engine oil pump has a first seat, a second seat attached to the first seat, and a regulating valve assembly and a pressurizing assembly mounted in the second seat. An eccentric wheel of the pressurizing assembly meshes with a plug of the regulating valve assembly. With the plug driving the eccentric wheel to rotate by an angle, a volume flow rate of engine oil output by the engine oil pump can be adjusted. Elements used for adjusting the output of the engine oil are reduced, and manufacturing cost and assembling complexity of the engine oil pump are lowered accordingly. Moreover, since the regulating valve assembly drives the pressurizing assembly directly, the regulating valve assembly can drive the pressurizing assembly efficiently.
    Type: Grant
    Filed: November 18, 2014
    Date of Patent: September 5, 2017
    Assignee: ZUISHO PRECISION INDUSTRIAL CO., LTD.
    Inventors: Huei-Shen Ma, Ying-Yi Ho
  • Patent number: 9732822
    Abstract: A gas spring device includes a gas spring which generates a force proportional to a differential pressure between an inner space pressure and an atmospheric pressure, a suction/discharge part which can adjust a gas amount in the gas spring inner space, a rotary body which is connected to the gas spring, to which a torque due to the force generated by the spring is applied, a displacement part which is connected to the rotary body, and is displaced in conjunction with a rotary body rotary movement, a speed change part which is arranged in one of or both of between the rotary body and the displacement part and between the gas spring and the rotary body, and a torque compensating part which sets the torque applied to the rotary body to substantially 0 when the inner space gas amount of the gas spring is at a predetermined value.
    Type: Grant
    Filed: April 29, 2014
    Date of Patent: August 15, 2017
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventor: Katsuhiko Asai
  • Patent number: 9670926
    Abstract: A variable displacement pump includes a variable mechanism configured to change a volume-variation rate of each pump chamber by movement of a movable member; a biasing mechanism provided to bias the movable member in a direction that increases the volume-variation rate; at least one reduction-side control oil chamber to which oil is supplied from a discharge portion such that the reduction-side control oil chamber applies force to the movable member in a direction that reduces the volume-variation rate; at least one increase-side control oil chamber to which oil is supplied from the discharge portion such that the increase-side control oil chamber applies force to the movable member in the direction that increases the volume-variation rate; and a control mechanism configured to control a oil quantity which is supplied to each control oil chamber. The total number of the control oil chambers is three or more.
    Type: Grant
    Filed: February 23, 2015
    Date of Patent: June 6, 2017
    Assignee: HITACHI AUTOMATIVE SYSTEMS, LTD.
    Inventors: Hideaki Ohnishi, Yasushi Watanabe
  • Patent number: 9567997
    Abstract: In a variable capacity type vane pump in which a cam ring pivots, a discharge port is so formed that an absolute value of a difference between a discharge port start edge line inclination angle and a discharge port end edge line inclination angle is larger than a vane angle.
    Type: Grant
    Filed: March 5, 2013
    Date of Patent: February 14, 2017
    Assignee: KYB Corporation
    Inventors: Koichiro Akatsuka, Tomoyuki Fujita, Masamichi Sugihara, Fumiyasu Kato
  • Patent number: 9534595
    Abstract: A variable displacement vane pump includes: an adapter ring (a cam ring housing member) that defines a first fluid pressure chamber and a second fluid pressure chamber relative to an outer periphery of a cam ring, the cam ring being moved relative to a rotor by a differential pressure between the first fluid pressure chamber and the second fluid pressure chamber; a seal housing groove formed in an inner periphery of the adapter ring; and a slipper seal which is inserted into the seal housing groove and with which an outer periphery of the cam ring comes into sliding contact when the cam ring moves, whereby the slipper seal partitions the first fluid pressure chamber from the second fluid pressure chamber, wherein the slipper seal is formed in a thin plate shape having a square cross-section.
    Type: Grant
    Filed: September 20, 2013
    Date of Patent: January 3, 2017
    Assignee: KYB Corporation
    Inventors: Koichiro Akatsuka, Tomoyuki Fujita, Masamichi Sugihara, Fumiyasu Kato
  • Patent number: 9534597
    Abstract: A variable capacity vane pump for an automobile includes a pump control ring positioned within the housing to move about a pivot. A rotor is positioned within a cavity of the control ring such that a position of the control ring determines an offset between a center of the cavity and an axis of rotation of the rotor. A first control chamber is provided between the pump housing and a first outer surface of the control ring. The first outer surface is positioned on an opposite side of the control ring as the working fluid chambers within the cavity. A second control chamber is provided between the pump housing and a second outer surface of the control ring. A return spring biases the control ring toward a position of maximum volumetric capacity against the forces created by the pressurized fluid within the first and second control chambers.
    Type: Grant
    Filed: August 31, 2015
    Date of Patent: January 3, 2017
    Assignee: Magna Powertrain Inc.
    Inventors: Matthew Williamson, David R. Shulver, Cezar Tanasuca
  • Patent number: 9494152
    Abstract: A variable displacement pump includes: a control mechanism arranged to be actuated based on a hydraulic pressure introduced into the introduction passage before the eccentric amount is minimized, and arranged to introduce the hydraulic pressure through a throttling to the second control hydraulic chamber when the hydraulic pressure introduced from the introduction passage is equal to or smaller than a predetermined pressure, and to discharge the hydraulic fluid within the second control hydraulic chamber in accordance with the hydraulic pressure when the hydraulic pressure introduced from the introduction passage becomes greater than the predetermined pressure; and a switching mechanism arranged to switch between a state in which the hydraulic fluid introduced into the introduction passage is introduced to the control mechanism, and a state in which the hydraulic fluid introduced into the introduction passage is discharged from the control mechanism.
    Type: Grant
    Filed: November 6, 2013
    Date of Patent: November 15, 2016
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventor: Koji Saga
  • Patent number: 9482228
    Abstract: In a variable capacity vane pump in which a discharge capacity of a pump chamber is varied by varying an amount of eccentricity of a cam ring relative to a rotor, a port inner wall surface that extends around an inner peripheral cam surface of the cam ring when the cam ring moves in a direction for increasing the amount of eccentricity of the cam ring relative to the rotor is formed on an intake port.
    Type: Grant
    Filed: March 1, 2013
    Date of Patent: November 1, 2016
    Assignee: KYB Corporation
    Inventors: Tomoyuki Fujita, Masamichi Sugihara, Koichiro Akatsuka, Fumiyasu Kato
  • Patent number: 9243632
    Abstract: An oil pump includes first and second control chambers, a biasing mechanism, and a changeover mechanism. The changeover mechanism connects the first control chamber with a drain portion when a valving element is in a first position, introduces a discharge pressure into the first and second control chambers when the valving element reaches a second position, and drains oil of the second control chamber to the drain portion and introduces the discharge pressure into the first control chamber when the valving element reaches a third position. The changeover mechanism changes from the first position to the second position, when the discharge pressure becomes higher than a pressure level at which the cam ring can move against a set load of the biasing mechanism, and is lower than a pressure level at which a biasing force of the biasing mechanism is increased in a stepwise manner.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: January 26, 2016
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventor: Koji Saga
  • Patent number: 9206800
    Abstract: The present invention is a multiple stage variable displacement vane pump comprising a pressure regulating spring guide. A first spring and a second spring may be controlled by said pressure regulating spring guide. The present invention does not require a solenoid or electronic control. Control of flow and speed is achieved through operable of the pressure regulating spring guide that causes the first spring and second spring to be operable in relation to one another, but for the first spring and the second spring to be operable independently of each other. The springs may be positioned to be inline in relation to each other. Rotation of a slide and pressure exerted thereby upon the pressure regulating spring guide may create a first spring regulation stage and a second spring regulation stage.
    Type: Grant
    Filed: May 17, 2013
    Date of Patent: December 8, 2015
    Assignee: Magna Powertrain Inc.
    Inventor: Guiseppe Rago
  • Patent number: 9181803
    Abstract: A variable capacity vane pump includes a first control chamber between a pump casing and a first portion of a pump control ring. The first portion of the control ring circumferentially extends on either side of a pivot pin. A second control chamber is provided between the pump casing and a second portion of the pump control ring. The first and second control chambers are operable to receive pressurized fluid to create a force to move the pump control ring to reduce the volumetric capacity of the pump. A return spring biases the pump ring toward a position of maximum volumetric capacity.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: November 10, 2015
    Assignee: Magna Powertrain Inc.
    Inventors: Matthew Williamson, David R. Shulver, Cezar Tanasuca
  • Patent number: 9133738
    Abstract: A variable displacement lubricant pump providing a pressurized lubricant for an engine includes a control ring. A pump housing comprises a pump rotor with radially slidable vanes which rotate in the control ring. A pressure control chamber pushes the control ring into a low pumping volume direction against a force of a flexible pretensioning element. The pressure control chamber is connected with a pump outlet port via a first pressure conduit. A pretension control unit adjusts discharge pressures of the pressurized lubricant. The pretension control unit comprises a pretension cylinder with a plunger and an outlet opening arranged in a cylinder wall. The plunger is axially moveable and supports the flexible pretensioning element to push the control ring into a high pumping volume direction. The pretension cylinder is connected with the pump outlet port via a second pressure conduit. The outlet opening is connectable to a low-pressure via an electrical pretension control valve.
    Type: Grant
    Filed: November 24, 2010
    Date of Patent: September 15, 2015
    Assignee: PIERBURG PUMP TECHNOLOGY GMBH
    Inventor: Carmine Cuneo
  • Patent number: 9109597
    Abstract: A variable displacement vane pump has a plurality of seals between the inner surface defining the housing's internal chamber and an outer surface of the control ring. The seals define pressure regulating chambers. A first chamber is defined between a pair of seals located in a circumferential direction of the ring on opposing sides of the pivotal mounting of the ring and has at least one inlet for receiving pressurized fluid. The circumferential extent of the first chamber is greater along a portion for applying force to the ring in a second pivotal direction than along a portion for applying force in the first pivotal direction such that a net force is applied in the second pivotal direction. A second chamber has at least one outlet for receiving pressurized fluid such that the entire circumferential extent of the second chamber applies force to the ring in the second pivotal direction.
    Type: Grant
    Filed: January 15, 2013
    Date of Patent: August 18, 2015
    Assignee: STACKPOLE INTERNATIONAL ENGINEERED PRODUCTS LTD
    Inventors: Oliver Böwing, Hans Peter Kutzer
  • Patent number: 9109596
    Abstract: A variable displacement pump includes: a first control oil chamber which moves a cam ring toward a direction against a biasing force of a biasing member when a discharge pressure is introduced thereinto; a second control oil chamber which acts a hydraulic pressure upon the cam ring by cooperating with the biasing force of the biasing member when hydraulic oil is introduced thereinto; a switching mechanism which switches between one state in which hydraulic oil whose pressure is decreased than a discharge pressure is introduced to the second control oil chamber from the discharge section and another state in which hydraulic oil is discharged from the second control oil chamber; and a control mechanism operated before an eccentricity of the cam ring becomes a minimum and which discharges a greater amount of hydraulic oil within the second control oil chamber as the discharge pressure becomes larger.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: August 18, 2015
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Hideaki Ohnishi, Koji Saga, Yasushi Watanabe
  • Patent number: 9062674
    Abstract: In a vane pump, when discharge pressures of respective discharge ports are different from each other, an extension length L1 of a notch groove which is provided in the discharge port in a side of a high discharge pressure is set longer than an extension length L2 of a notch groove which is provided in the discharge port in a side of a low discharge pressure.
    Type: Grant
    Filed: March 19, 2012
    Date of Patent: June 23, 2015
    Assignee: Showa Corporation
    Inventors: Hiroyuki Ishihama, Naoya Taga, Toshio Nishikawa
  • Publication number: 20150110659
    Abstract: A vane pump includes a rotor including a first annular groove and a second annular groove. The rotor further includes a cylindrical portion projecting axially from a radial inner side of the first annular groove and fitting over a drive shaft, and a slide contact portion formed on a radial inner side of the second annular groove. The cylindrical portion is slidably received in a bearing hole formed in a first side wall of a housing, whereas the slide contact portion abuts slidably on an inside wall surface of a second side wall of the housing. There is further formed, in the first annular groove, a recessed portion making a pressure receiving area of one of the first and second annular grooves greater than a pressure receiving area of the other of the first and second annular grooves.
    Type: Application
    Filed: October 17, 2014
    Publication date: April 23, 2015
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Koji SAGA, Hideaki OHNISHI, Yasushi WATANABE
  • Patent number: 9004882
    Abstract: A variable displacement pump includes: a first urging member arranged to urge the cam ring in a direction to increase the eccentric amount; a second urging member arranged to urge the cam ring in a direction to decrease the eccentric amount; a control hydraulic chamber arranged to receive a discharge pressure, and thereby to move the cam ring against the urging force of the first urging member; and a hydraulic pressure introduction section configured to introduce the discharge pressure to the control hydraulic chamber when the discharge pressure becomes greater than a predetermined pressure which is in a range where the cam ring is movable against a resultant force of the urging forces of the first and second urging members, and where the cam ring is not movable only against the urging force of the first urging member.
    Type: Grant
    Filed: April 6, 2012
    Date of Patent: April 14, 2015
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Hideaki Ohnishi, Koji Saga, Yasushi Watanabe
  • Patent number: 8992184
    Abstract: A lubricant pump system may include a lubricant pump controlled by a proportional valve. An actuating unit may be disposed in the lubricant pump and configured to control a delivery output of the lubricant pump. A first pressure chamber and at least one second pressure chamber may be configured to adjust the actuating unit against a spring, wherein the second pressure chamber is smaller than the first pressure chamber. In response to a failure of the proportional valve, the lubricant pump may be exclusively pressurized via the at least one second pressure chamber.
    Type: Grant
    Filed: June 4, 2010
    Date of Patent: March 31, 2015
    Assignee: Mahle International GmbH
    Inventor: René Wagner
  • Patent number: 8985976
    Abstract: An expander-integrated compressor (100) includes: a compression mechanism (2) for compressing a working fluid; an expansion mechanism (3) for expanding a working fluid; and a shaft (5) that couples the compression mechanism (2) and the expansion mechanism (3). The expansion mechanism (3) includes a variable vane mechanism (60). The variable vane mechanism (60) controls the movement of a first vane (48) so that the ratio of a period P2 to a period P1 (P2/P1) can be adjusted, where P1 denotes the period during which the first vane (48) is in contact with a first piston (46) in the course of one rotation of the shaft (5), and P2 denotes the period during which the first vane (48) is spaced from the first piston (46) in the course of one rotation of the shaft (5).
    Type: Grant
    Filed: May 18, 2009
    Date of Patent: March 24, 2015
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Yasufumi Takahashi, Atsuo Okaichi, Takeshi Ogata, Hidetoshi Taguchi, Takumi Hikichi, Masaru Matsui
  • Patent number: 8894393
    Abstract: An oil pump for a vehicle including a sealing apparatus is provided for preventing leakage of oil from the regulator chamber. The oil pump includes a sealing chamber formed between the outer ring and the housing, a sealing apparatus disposed in the sealing chamber, and an oil passage formed in the outer ring to facilitate a fluid communication of the sealing chamber with the regulator chamber. The sealing apparatus includes a contact portion, first and second sealing members. The first sealing member closely contacts the contact portion if the second sealing member is pushed by the hydraulic pressure of the regulator chamber supplied thereto through the oil passage, and thus prevents leakage of oil from the regulator chamber.
    Type: Grant
    Filed: July 17, 2012
    Date of Patent: November 25, 2014
    Assignee: Hyundai Motor Company
    Inventor: Yeon Ho Ju
  • Patent number: 8814544
    Abstract: A rotary pump with an improved seal on a control pressure chamber, including: a housing having a delivery chamber; a feed wheel rotatable in the delivery chamber; an actuating member surrounding the feed wheel forming delivery cells and moveable in the housing relative to the feed wheel. The control pressure chamber is delineated by the actuating member together with axially facing axial co-operating surfaces, forming an axial sealing gap and a radial sealing gap. A control fluid can be introduced into the control pressure chamber for applying pressure to the actuating member to exert an actuating force in the actuating direction; a restoring device for generating a restoring force; and a sealing element arranged on the actuating member or the circumferential co-operating surface. To compensate for a change in gap width of one of the axial sealing gaps, a base leakage cross-section is provided on the sealing element.
    Type: Grant
    Filed: November 8, 2012
    Date of Patent: August 26, 2014
    Assignee: Schwabische Huttenwerke Automotive GmbH
    Inventors: Jürgen Ebinger, Michael Ehringer, Kim Boris Friedrich, Stefan Küchle, Boris Memel, Sven Peters, Lothar Preisler, Anton Schmid, Klaus Wiggenhauser
  • Publication number: 20140170008
    Abstract: Variable displacement oil pump for supplying oil to an internal combustion engine. Included is a cam ring having an inner peripheral section for accommodating the pump element thereinside, and an outer peripheral section having a swinging movement fulcrum. A control device for changeover controlling supply of a discharge pressure to first and second pressure chambers so the cam ring is swingingly movable to change an eccentricity amount of the cam ring relative to an axis of the rotor, wherein the first pressure receiving surface is set larger in pressure receiving area than the second pressure receiving surface, wherein a part of each of the first and second pressure chambers is disposed overlapping with the discharge region in a radial direction of the rotor, and wherein the first and second pressure chambers are disposed nearer to the swinging movement fulcrum than to the axis of the cam ring.
    Type: Application
    Filed: February 21, 2014
    Publication date: June 19, 2014
    Applicant: Hitachi Automotive Systems, Ltd.
    Inventors: Yasushi WATANABE, Hideaki OHNISHI, Atsushi NAGANUMA
  • Patent number: 8740592
    Abstract: An adjustable vane cell pump is provided having a rotor, which includes, but is not limited to bearing slots extending in radial direction, in which cane plates displaceable relative to the bearing slots are arranged. The vane cell pump further includes, but is not limited to an adjustable slide having a substantially cylindrical inner surface. The rotor is configured in order to driveably rotate about a rotary axis within the slide. The vane plates bear against the inner surface of the slide, and the slide further includes, but is not limited to a first and a second areal end face, as well as recesses, which outer-circumferentially extend parallel to the end faces.
    Type: Grant
    Filed: February 13, 2012
    Date of Patent: June 3, 2014
    Assignee: GM Global Technology Operations LLC
    Inventors: Georg Zwickler, Herbert Schmitz
  • Patent number: 8684702
    Abstract: A variable displacement oil pump for an automotive engine. The oil pump includes a cam ring accommodating thereinside a pump element having a rotor. The cam ring is swingingly movably accommodated in a housing and biased in a direction to increase an eccentricity amount of the cam ring relative to the axis of the rotor by a biasing member. First and second pressure chambers are defined inside the housing by the outer peripheral section of the cam ring. The first pressure chamber is supplied with a discharge pressure to be applied to the cam ring to oppose to a biasing force of the biasing member. The second pressure chamber is supplied with the discharge pressure to be applied to the cam ring to assist the biasing force of the biasing member. Additionally, a control device is provided for controlling supply of the discharge pressure to the second pressure chamber.
    Type: Grant
    Filed: March 8, 2010
    Date of Patent: April 1, 2014
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Yasushi Watanabe, Hideaki Ohnishi, Atsushi Naganuma
  • Patent number: 8651825
    Abstract: A variable capacity vane includes a pump control ring which is moveable to alter the capacity of the pump and the pump can be operated at either of at least two selected equilibrium pressures. The pump ring is moved by at least first and second control chambers, the control chambers abutting the control ring such that pressurized fluid supplied to them acts on the pump control ring to move the pump control ring to reduce the volumetric capacity of the pump. When pressurized fluid is supplied to only one control chamber, the pump operates at a first equilibrium pressure and when pressurized fluid is also supplied to the second chamber, the pump operates at a second equilibrium pressure. Pressurized fluid can also be supplied only to the second control chamber to operate the pump at a third equilibrium pressure and/or additional control chambers can be provided if required.
    Type: Grant
    Filed: November 27, 2012
    Date of Patent: February 18, 2014
    Assignee: Magna Powertrain Inc.
    Inventors: Matthew Williamson, David R. Shulver
  • Patent number: 8613610
    Abstract: A variable displacement pump includes a pump structural member configured to change volumes of a plurality of working chambers by rotation of a rotor, so as to introduce oil through an inlet port into the working chambers and to discharge the oil through a discharge port, and further configured to oscillate a cam ring by a discharge pressure introduced into a control oil chamber. A first coil spring is provided to force the cam ring in a direction for increasing of a rate of change of the working-chamber volume. A second coil spring is provided to force the cam ring in a direction for decreasing of the rate of change of the working-chamber volume. The first and second coil springs are laid out on both sides of an arm portion of the cam ring in a manner so as to be opposed to each other.
    Type: Grant
    Filed: November 16, 2010
    Date of Patent: December 24, 2013
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Koji Saga, Hideaki Ohnishi, Yasushi Watanabe
  • Patent number: 8602749
    Abstract: A variable displacement vane pump includes, but is not limited to inlet and outlet ports in a pump body, a drive shaft rotatably mounted in the pump body, a rotor driven by the drive shaft and radially extending vanes slidably disposed in the rotor. A slide is pivotally disposed on a pivot and has a central axis eccentric to the axis of the rotor. Chambers are defined by the rotor, the vanes and the slide that are successively connected to the inlet and outlet ports. A resilient member is pivotally engaged with the slide and acts on the slide to urge the slide in one direction.
    Type: Grant
    Filed: May 4, 2010
    Date of Patent: December 10, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Georg Zwickler, Herbert Schmitz
  • Patent number: 8597002
    Abstract: A hydraulic pump or motor includes a body having a chamber and a rotor rotatably mounted within the chamber. The chamber and rotor are shaped to define one or more rise regions, fall regions, major dwell regions and minor dwell regions between walls of the chamber and the rotor. The rotor has a plurality of slots and vanes located in each slot. Each vane is movable between a retracted position and an extended position. In the retracted position, the vanes are unable to work the hydraulic fluid introduced into the chamber whereas they are able to work the hydraulic fluid introduced into the chamber in the extended position. A vane retaining member that is selectively actuable enables the vanes to be retained in the retracted position.
    Type: Grant
    Filed: May 14, 2009
    Date of Patent: December 3, 2013
    Assignee: Mathers Hydraulics Pty. Ltd.
    Inventor: Norman Ian Mathers
  • Patent number: 8597003
    Abstract: A lubrication system for a power transmission device includes a variable displacement vane pump including a moveable control ring for varying the displacement of the pump. A linear actuator directly acts on the control ring for moving the control ring between maximum and minimum pump displacement positions. The linear actuator includes an electric motor for rotating a drive member. The drive member engages a driven actuator shaft to cause linear translation of the actuator shaft in response to rotation of the drive member. A control system includes a controller for signaling the actuator to extend or retract the actuator shaft to vary the pump displacement.
    Type: Grant
    Filed: October 8, 2009
    Date of Patent: December 3, 2013
    Assignee: Magna Powertrain Inc.
    Inventors: Peter Krug, Vasilios B. Liavas, Gurvinder Bhogal
  • Patent number: 8555628
    Abstract: A variable displacement pump including a drive shaft, a cam ring eccentrically moveable with respect to an axis of the drive shaft, and a solenoid drivingly controlled on the basis of variation in electric current amount to be supplied to the solenoid which is controlled in accordance with an operating condition of a vehicle. The solenoid is configured such that a rate of change in the specific discharge amount relative to the electric current amount to be supplied to the solenoid under a condition that the specific discharge amount is smaller is reduced as compared to a rate of change in the specific discharge amount relative to the electric current amount to be supplied to the solenoid under a condition that the specific discharge amount is larger.
    Type: Grant
    Filed: November 10, 2009
    Date of Patent: October 15, 2013
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Shigeaki Yamamuro, Makoto Tada, Satoshi Nonaka
  • Patent number: 8550796
    Abstract: An internal gear fluidic machine, in particular a pump for the lubrication circuit of a motor vehicle engine, comprises an operating part including an external gear (2) and an internal gear (4), which is housed within an axial cavity (25) of the external gear (2) and meshes with the latter. The external gear (2) is associated with a translating mechanism (8, 22), arranged to cause an axial sliding thereof relative to the internal gear (4) in order to vary the capacity and the fluid flow rate of the machine. The translating mechanism (8, 22) defines a first capacity, adjustment space (24) in communication with a high pressure chamber (48) of the machine, and a second capacity adjustment space (15) where pressure conditions exist that are dependent on the operating conditions of an element, different from the high pressure chamber (48), of a fluidic circuit in which the machine (1) is connected.
    Type: Grant
    Filed: April 14, 2010
    Date of Patent: October 8, 2013
    Assignee: VHIT S.p.A.
    Inventors: Armando Codeca, Matteo Cortesi, Franco Fermini
  • Patent number: 8545200
    Abstract: Variable displacement oil pump includes a: rotor; vanes; cam ring; housing; biasing member biasing the cam ring in a direction enlarging an eccentricity between centers of the rotor and inner circumferential surface of the cam ring; a contact surface to contact with a cam ring outer circumferential surface via a biasing force applied to the cam ring by the biasing member; a control chamber separately formed by the contact surface and a swing fulcrum of the cam ring on a cam ring outer circumference when the contact surface contacts the cam ring outer circumferential surface, and causing the cam ring to swing against the biasing force of the biasing member by a pressure from a discharge portion to the control chamber; and a choking portion formed on the outer circumferential surface of the cam ring to maintain a pressure of the control chamber even when the cam ring swings.
    Type: Grant
    Filed: March 8, 2010
    Date of Patent: October 1, 2013
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Yasushi Watanabe, Atsushi Naganuma, Hideaki Ohnishi
  • Patent number: 8545199
    Abstract: The invention relates to a vane pump (1), in particular a regulatable oil pump for a lubricating system, with a pump housing (2) with at least one housing tank (6) and with a vane rotor (11) disposed in the housing tank (6) mounted so that it can be rotated by means of a drive shaft (10) in the pump housing (2) constituting an axis of rotation (23) which provides a mount for vanes (15) in approximately radially extending fitting slots (14). An adjusting ring (27) is provided enclosing the vane rotor (11) and circumferentially bounding pump cells (26) which, by means of a cylindrical internal wall surface (31), can be displaced between a concentric position with respect to the vane rotor (11) and an eccentric position relative thereto, to which pressured is applied by positioning torques caused by the medium pressure and a positioning mechanism (47) in order to regulate a pressure level.
    Type: Grant
    Filed: July 20, 2006
    Date of Patent: October 1, 2013
    Assignee: MIBA Sinter Holding GmbH & Co KG
    Inventors: Johannes Koller, Franz Wimmer, Helmut Buchleitner, Helmut Pamminger, Michael Hiller
  • Patent number: 8512006
    Abstract: The present invention is a variable displacement pump system for delivering precisely controlled oil flow and pressure, including a variable displacement pump having an inlet passage, an outlet passage, a first chamber and a second chamber for controlling the displacement of the variable displacement pump. The present invention also includes a fluid control device for receiving fluid from the outlet passage, and selectively delivering fluid to the second chamber. Fluid is delivered from the inlet passage to the outlet passage from the variable displacement pump, and fluid is also delivered from the outlet passage to the first chamber and the fluid control device. When fluid pressure is greater in the first chamber relative to the second chamber, the displacement of the variable displacement pump will decrease, and when fluid pressure is greater in the second chamber relative to the first chamber, the displacement of the variable displacement pump will increase.
    Type: Grant
    Filed: May 2, 2008
    Date of Patent: August 20, 2013
    Assignee: BorgWarner Inc.
    Inventor: Douglas G. Hunter
  • Patent number: 8469683
    Abstract: A variable-displacement oil pump wherein between a projection of a mobile ring and a corresponding driving chamber and between a protrusion (again of the mobile ring) and a corresponding guiding seat, respectively, there are placed corresponding devices adapted to decrease the effects of the friction between the projections on the mobile ring and the corresponding seats obtained on a main body of the pump itself.
    Type: Grant
    Filed: November 28, 2007
    Date of Patent: June 25, 2013
    Assignee: Pierburg Pump Technology Italy S.p.A.
    Inventors: Giacomo Armenio, Massimiliano Lazzerini, Nicola Novi, Raffaele Squarcini
  • Publication number: 20130136641
    Abstract: A variable-displacement lubricant pump includes a first plunger. A control ring is pushed by the first plunger in a high pumping volume direction. The first plunger is arranged in a first control chamber with a side wall. A first pressure conduit connects a pump outlet port with the first control chamber. A pumping volume limitation unit is arranged so that the first plunger covers and closes an outlet opening arranged in the side wall in a lower pumping volume position of the control ring. A thermostatic element actuates a temperature controlled valve based on lubricant temperature. The thermostatic element pushes a shiftable valve body against a retraction spring to an extended closed end position when the lubricant has an operation temperature.
    Type: Application
    Filed: July 29, 2010
    Publication date: May 30, 2013
    Applicant: PIERBURG PUMP TECHNOLOGY GMBH
    Inventors: Nicola Novi, Jerome Maffeis
  • Patent number: 8430645
    Abstract: A pump having a housing with an actuator member positioned inside for controlling the flow generated by the pump. A first decrease port is connected to the housing and has a surface area in operable contact with the actuator member. A second decrease port is connected to the housing and has a surface area that is operable contact with the actuator member. A valve is connected to the second decrease port for controlling the flow of fluid to the second decrease port. A suction passage is connected to the housing and drawings fluid to the housing using the actuator member. A discharge passage is connected to the housing so that fluid providing an exit for fluid that has been pressurized by the actuator member.
    Type: Grant
    Filed: September 6, 2007
    Date of Patent: April 30, 2013
    Assignee: SLW Automotive Inc.
    Inventors: Matthew J. Jannausch, Douglas G. Hunter
  • Publication number: 20130071275
    Abstract: A variable displacement lubricant pump for providing a pressurized lubricant for an internal combustion engine includes a shiftable control ring. The control ring comprises a plurality of pump chambers and a pressure relief valve. The plurality of pump chambers rotate through a charge zone and a discharge zone. A pump rotor comprises radially slidable vanes. The pump rotor rotates in the control ring. A pretensioning element pushes the control ring to a high pumping volume direction. A first control chamber pushes the control ring to a low pumping volume direction. A second control chamber pushes the control ring to the high pumping volume direction. A pump outlet is connected to the first control chamber. A throttle valve connects the first control chamber with the second control chamber. The pressure relief valve of the control ring connects the discharge zone to the second control chamber.
    Type: Application
    Filed: May 28, 2010
    Publication date: March 21, 2013
    Applicant: PIERBURG PUMP TECHNOLOGY GMBH
    Inventors: Matteo Gasperini, Stefano Fiorini, Massimiliano Lazzerini, Raffaele Squarcini
  • Patent number: 8393151
    Abstract: A flow rate control device of a hydraulic pump in a power steering system, may include an upper cam ring having a cam profile, which is fixedly installed, a lower cam ring having a cam profile, which is engaged with the upper cam ring to be relatively rotatable about the upper cam ring, and a rotor including a plurality of vanes and engaged with the upper and lower cam rings to form an inner space therebetween to pressurize oil by protruding the vanes in the inner space by centrifugal force while rotating.
    Type: Grant
    Filed: August 7, 2009
    Date of Patent: March 12, 2013
    Assignee: Hyundai Motor Company
    Inventor: Seungbum Cho
  • Patent number: 8382461
    Abstract: An impeller for a vane cell pump includes, but is not limited to vane receptacles for receiving an at least radially movable pump vane. A chamber wall is formed between two adjacent vane receptacles to form a conveying chamber. The chamber wall has an axially projecting web for delimiting a movement of a position ring with respect to the radial movement of the pump vane. The chamber wall includes, but is not limited to a first wall region for secure receiving of the respective pump vane in the vane receptacle. The chamber wall further includes, but is not limited to a second wall region for forming a web thickness d of the web for secure abutment of a sintering tool. In addition, the chamber wall has a third wall region for forming an enlarged conveying chamber volume. As a result, the impeller is easily manufactured and has an enlarged pump capacity for the same installation space.
    Type: Grant
    Filed: January 27, 2009
    Date of Patent: February 26, 2013
    Assignee: GM Global Technology Operations LLC
    Inventor: Georg Hedrich
  • Patent number: 8376724
    Abstract: An oil pump includes a drive gear, which rotates with a drive shaft, a driven gear, which meshes with the drive gear and is supported rotatable on a driven shaft, and a casing having a pump chamber, which accommodates the drive gear and the driven gear. The casing of the gear pump is provided with an intake port and a discharge port, which are in fluid communication with the pump chamber, so that oil is sucked through the intake port and discharged through the discharge port. A gear holder is provided in the casing such that the gear holder supports the driven gear rotatable and holds both sides of the driven gear while the gear holder itself is being supported axially movable by the driven shaft. The gear holder holding the driven gear moves axially by receiving a biasing force and also a pressing force acting against the biasing force.
    Type: Grant
    Filed: August 10, 2007
    Date of Patent: February 19, 2013
    Assignee: TBK Co., Ltd.
    Inventor: Keisuke Shinozaki
  • Patent number: RE46294
    Abstract: A variable displacement oil pump for an automotive engine. The oil pump includes a cam ring accommodating thereinside a pump element having a rotor. The cam ring is swingingly movably accommodated in a housing and biased in a direction to increase an eccentricity amount of the cam ring relative to the axis of the rotor by a biasing member. First and second pressure chambers are defined inside the housing by the outer peripheral section of the cam ring. The first pressure chamber is supplied with a discharge pressure to be applied to the cam ring to oppose to a biasing force of the biasing member. The second pressure chamber is supplied with the discharge pressure to be applied to the cam ring to assist the biasing force of the biasing member. Additionally, a control device is provided for controlling supply of the discharge pressure to the second pressure chamber.
    Type: Grant
    Filed: March 30, 2016
    Date of Patent: January 31, 2017
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Yasushi Watanabe, Hideaki Ohnishi, Atsushi Naganuma