Elongated Armature With Integral Projection Patents (Class 239/585.4)
  • Patent number: 10995715
    Abstract: A coil assembly in a fuel injector includes a magnetic core and; a winding wound around the core, the winding being overmoulded and forming a cylindrical overmoulding. An axial blind hole extends towards the interior of the coil assembly from a first surface to a distal end, the blind hole being suitable for housing at least one spring for loading a magnetic armature. The coil assembly is provided with a degassing hole passing through the core and the overmoulding from the blind axial hole to an axial outer cylindrical surface, the degassing hole being provided in the magnetic core and having a restriction that is arranged in a first section that is proximal to the blind axial hole.
    Type: Grant
    Filed: August 21, 2017
    Date of Patent: May 4, 2021
    Inventors: Philippe Legrand, Bruno Bimbenet, Stéphanie Lefevre
  • Patent number: 10760561
    Abstract: The present disclosure relates to a solenoid valve having a ventilation structure, in which a connection passage for connecting a first space that is an operating space of an armature and a second space that is a lower space of a bobbin is formed on a bottom surface of a housing. The second space of the bobbin is connected with an outer space of the housing by a communication path. Accordingly, by connecting the first space that is the operating space of the armature with an outer space of the solenoid valve, a negative pressure can be avoided in the operating space of the armature, thus preventing the performance of the armature from being deteriorated.
    Type: Grant
    Filed: June 1, 2018
    Date of Patent: September 1, 2020
    Assignee: HYUNDAI KEFICO CORPORATION
    Inventors: Jae Kyung Lee, Ho Yeon Kim
  • Patent number: 10711749
    Abstract: The disclosure relates to a fuel injection valve that includes a valve needle, a closing spring applying a spring force to the valve needle, which spring force loads the valve needle in the direction of a closing position, and an actuator assembly. A coil of the actuator assembly produces a magnetic force on a magnet armature of the actuator assembly such that, as the magnet armature travels toward a pole piece of the actuator assembly, the magnet armature covers an idle stroke to a stop element of the valve needle and then carries the valve needle toward the pole piece. A spring constant of the closing spring and the magnetic force are matched such that the magnitude of the resultant force of the spring force and the magnetic force decreases with increasing distance of the valve needle from the closing position and remains the same with increasing the distance.
    Type: Grant
    Filed: April 14, 2017
    Date of Patent: July 14, 2020
    Assignee: Vitesco Technologies GmbH
    Inventors: Dejan Jovovic, Hong Zhang, Xaver Gebhardt
  • Patent number: 10648440
    Abstract: A fuel injection valve includes a valve housing having an injection hole and a valve seat surface tapering toward a downstream side, a valve component that is accommodated in the valve housing and is coaxially separated from or seated on the valve seat surface, and an elastic component biasing the valve component toward the valve seat surface. The valve component includes an inner convex surface curved in a partial spherical shape with a predetermined curvature radius, and an outer convex surface that is provided continuously to the outer peripheral side of the inner convex surface and curved in a partial spherical shape having a smaller curvature radius than the inner convex surface. A boundary portion between the inner convex surface and the outer convex surface protrudes toward the valve seat surface so as to be able to be separated from or seated on the valve seat surface.
    Type: Grant
    Filed: May 25, 2016
    Date of Patent: May 12, 2020
    Assignee: DENSO CORPORATION
    Inventors: Yuusuke Toda, Shuichi Matsumoto, Yoshinori Yamashita
  • Patent number: 10641221
    Abstract: The present disclosure relates to internal combustion engines. Various embodiments may include an electromagnetic injection valve, particularly a solenoid type fluid injection valve for automotive applications. For example, an electromagnetic injection valve may include: an inlet tube; a valve body having a longitudinal axis and a cavity in which a valve needle moves; an upper magnetic ring press-fitted with the inlet tube or the valve body; a lower magnetic ring press-fitted with the valve body; and a housing part surrounding an electromagnetic actuator unit for moving the valve needle. The lower magnetic ring is positioned on the valve body in such a way that an upper side of the lower magnetic ring is in close contact with an underside of the housing part. The electromagnetic actuator unit abuts the upper magnetic ring and the lower magnetic ring on opposite axial sides. The housing part and/or the lower magnetic ring comprises a cut extending along the axis.
    Type: Grant
    Filed: October 10, 2016
    Date of Patent: May 5, 2020
    Assignee: CONTINENTAL AUTOMOTIVE GMBH
    Inventors: Stefano Carmela Filippi, Mauro Grandi, Francesco Lenzi, Valerio Polidori
  • Patent number: 10637317
    Abstract: The present disclosure provides an electromagnetic actuator that drives an armature by an electromagnetic force. The electromagnetic actuator includes a stator, a coil, and an insulator. The stator is formed of a magnetic material and has a cylindrical portion. The coil is disposed outside of the stator. The coil generates a magnetic field when being energized. The insulator is disposed in a particular region of the stator facing the coil in a radial direction. The insulator extends partially along the stator in a circumferential direction and suppresses a current flowing through the stator in the circumferential direction. The stator is continuously formed entirely along the circumferential direction by the magnetic material.
    Type: Grant
    Filed: May 15, 2017
    Date of Patent: April 28, 2020
    Assignee: DENSO CORPORATION
    Inventors: Kazuya Sassa, Naofumi Adachi, Shingo Kitani
  • Patent number: 10563609
    Abstract: A fuel injector includes a nozzle having at least one first orifice. The at least one first orifice selectively injects a first fuel. An outer check is located movably within the nozzle. The outer check includes at least one second orifice. The at least one second orifice selectively injects a second fuel. An inner check is located movably and concentrically within the outer check. The at least one first orifice is adapted to selectively inject at least one of the first fuel and the second fuel therethrough based on a position of each of the outer check and the inner check.
    Type: Grant
    Filed: November 16, 2017
    Date of Patent: February 18, 2020
    Assignee: Caterpillar Inc.
    Inventors: Bobby John, Glen Clifford Martin, Jonathan W. Anders, Robert M. Campion
  • Patent number: 10563631
    Abstract: The present disclosure relates to filters in general, and the teachings may be applied to a filter assembly for use in a fuel injector, the fuel injector, and internal combustion engines. A filter assembly may include: a filter element with a frame having an axial end and a tubular filter housing receiving the filter element. The filter housing may have a side wall with a taper supporting the axial end. The taper may have the shape of a conic section with an opening angle ? of less than 180°. The outer circumferential surface of the frame may include a first section in the section of the taper having the shape of a conic section with an opening angle ? of less than 180°.
    Type: Grant
    Filed: February 9, 2015
    Date of Patent: February 18, 2020
    Assignee: CONTINENTAL AUTOMOTIVE GMBH
    Inventors: Ivano Izzo, Cedric Louis Adrien Leger-Cartier, Gianluigi Manzo, Luca Matteucci, Marco Mechi
  • Patent number: 10550809
    Abstract: A valve assembly for an injection valve is disclosed. The valve assembly includes a valve body having a cavity with a fluid inlet portion and a fluid outlet portion, a valve needle, an armature which is able to slide on the valve needle, and a disc element positioned to limit axial displaceability of the armature relative to the valve needle. The disc element includes a plurality of passages extending in axial direction through a disc-shaped part of the disc element. The passages provide a first flow resistance for a fluid passing in a direction away from the fluid outlet passage and a second flow resistance in a direction towards the fluid outlet passage, wherein the second flow resistance is larger than the first flow resistance.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: February 4, 2020
    Assignee: Vitesco Technologies GmbH
    Inventors: Ivano Izzo, Filippo Falaschi
  • Patent number: 10502112
    Abstract: A fluid injector, including a fluid inlet, a fluid outlet and a fluid path from the fluid inlet to the fluid outlet; a tube having an end at the fluid inlet; a filter disposed in the tube proximal to the fluid inlet; and a volume reduction member disposed in the tube downstream of the filter, contacting an inner surface of the tube and including a through-bore defining at least a portion of the fluid path, the bore having a smaller diameter than an inner diameter of the tube and the volume reduction member occupying a volume in the tube such that the volume reduction member reduces an amount of space for fluid in the fluid injector. A cap member, in which the filter is disposed, engages with the volume reduction member such that the filter, the volume reduction member and the cap form a single assembly member.
    Type: Grant
    Filed: September 14, 2017
    Date of Patent: December 10, 2019
    Assignee: Vitesco Technologies USA, LLC
    Inventors: Josh Lee Hatfield, Stephen C Bugos
  • Patent number: 10288022
    Abstract: In an electromagnetic fuel injection which is structured such that both end surfaces of an inner circumferential iron core portion and an outer circumferential iron core portion face a movable iron core, and a non-magnetic portion made of a metal material is provided between both end surfaces, an object of the present invention is to realize a structure of the electromagnetic fuel injector in which a surface of a target object is unlikely to be affected by a heat treatment with the surface facing the movable iron core.
    Type: Grant
    Filed: January 27, 2014
    Date of Patent: May 14, 2019
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Yoshihito Yasukawa, Hideharu Ehara, Tohru Ishikawa, Kiyotaka Ogura, Motoyuki Abe, Ryo Kusakabe, Akiyasu Miyamoto
  • Patent number: 10280886
    Abstract: An object of the present invention is to provide a fuel injection valve which has a structure where failure hardly occurs in a valve member and a peripheral member thereof at the time of press-fitting of a fixed core. The present invention provides a fuel injection valve that includes: a valve member 114A; an anchor 102 which is relatively displaceable with respect to the valve member 114A; a fixed core 107 in which a through-hole 107A is formed; a gap forming member 133 which forms a gap between an engagement portion 129B on the valve member side and an engagement portion 102D on the anchor side; and a biasing spring 134 which biases the gap forming member 133 in a valve closing direction. The engagement portions 102D and 129B are provided in both the anchor 102 and the valve member 114A so as to be engaged with each other when the anchor 102 is displaced in a valve opening direction with respect to the valve member 114A, thereby regulating the displacement of the anchor 102 in the valve opening direction.
    Type: Grant
    Filed: June 17, 2015
    Date of Patent: May 7, 2019
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Masashi Sugaya, Kiyotaka Ogura, Takao Miyake, Yoshihito Yasukawa, Ryo Kusakabe, Atsushi Nakai
  • Patent number: 10113524
    Abstract: A fuel injector, including a valve insert and a plug extrusion coating, is described, the valve insert including a valve seat and a valve housing. The valve housing has an alignment device, which is equipped to align the valve insert in an injection molding die, and the plastic extrusion coating has a second alignment device which is equipped to align the fuel injector during assembly in an internal combustion engine.
    Type: Grant
    Filed: May 15, 2012
    Date of Patent: October 30, 2018
    Assignee: ROBERT BOSCH GMBH
    Inventors: Rainer Naumann, Johann Bayer
  • Patent number: 10082117
    Abstract: A method of controlling a fuel injection device that can control a small amount of injection is provided. A fuel injection device for use in an internal combustion engine, includes: a valve body that can open and close a fuel passage, a needle that transfers a force with the valve body, and executes valve opening/closing operation, and an electromagnet that includes a coil and a magnetic core provided as a driver for driving the needle, and a cylindrical nozzle holder disposed on an outer periphery of the magnetic core and the needle, in which a current is supplied to the coil to exert a magnetic attractive force between the magnetic core and the needle to open the valve body.
    Type: Grant
    Filed: April 21, 2016
    Date of Patent: September 25, 2018
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Ryo Kusakabe, Motoyuki Abe, Yoshihito Yasukawa, Noriyuki Maekawa, Takuya Mayuzumi, Tohru Ishikawa
  • Patent number: 9903327
    Abstract: A fuel injector includes a valve with a needle that is movable along a longitudinal axis between an open position and a closed position, for opening or closing the valve. The fuel injector also includes an actuator including an armature and a pole piece, the armature being axially movable and operable to interact mechanically with the needle, such that the needle is moved towards the open position by a movement of the armature in axial direction towards the pole piece. The fuel injector also includes a first spring for biasing the armature in axial direction away from the pole piece. The spring force of the first spring is configured to stop said movement of the armature when the needle is in the open position.
    Type: Grant
    Filed: May 27, 2015
    Date of Patent: February 27, 2018
    Assignee: CONTINENTAL AUTOMOTIVE GMBH
    Inventors: Ivano Izzo, Marco Mechi
  • Patent number: 9863333
    Abstract: A dual fuel injector may be used to inject both gas and liquid fuel into a cylinder of a compression ignition engine. An injector body defines a first set of nozzle outlets, a second set of nozzle outlets, a first fuel inlet and a second fuel inlet. A dual solenoid actuator includes a first armature, a first coil, a second armature and a second coil that share a common centerline. The dual solenoid actuator has a non-injection configuration at which the first armature is at an un-energized position and the second armature is at an un-energized position. The dual solenoid actuator has a first fuel injection configuration at which the first fuel inlet is fluidly connected to the first set of nozzle outlets, the first armature is at an energized position and the second armature is at the un-energized position.
    Type: Grant
    Filed: January 23, 2015
    Date of Patent: January 9, 2018
    Assignee: Caterpillar Inc.
    Inventors: Hoisan Kim, Mark F. Sommars, Xiangdong Ding
  • Patent number: 9856989
    Abstract: A valve body for an electromechanically operable valve is produced by providing a base element with a circumferential sidewall having a first portion, a second portion, and a third portion, the sidewall being made of a ferromagnetic material and enclosing a cavity extending along a longitudinal axis. The third portion is positioned in longitudinal direction between the first portion and the second portion. A thickness of the third portion is smaller than a thickness of the first portion and the second portion. Hardening the third portion is achieved by laser heating, which transforms a material structure of the third portion into a martensitic structure. The locally decreased thickness creates a bottleneck for a magnetic flux, and a magnetic flux bypass in the valve body is reduced due to magnetic saturation; however, a structural resistance of the valve body remains high due to the laser induced hardening.
    Type: Grant
    Filed: June 2, 2014
    Date of Patent: January 2, 2018
    Assignee: CONTINENTAL AUTOMOTIVE GMBH
    Inventors: Francesco Lenzi, Stefano Filippi, Mauro Grandi
  • Patent number: 9771907
    Abstract: A fuel injector for an internal combustion engine includes an injector body, a first actuator for controlling movement of a first valve needle for injecting a first fuel into a cylinder of the engine, and a second actuator for controlling movement of a second valve needle for injecting a second fuel into the cylinder. Each of the actuators are axially spaced along a longitudinal axis of the injector body and has a respective conductive element for carrying current to the actuator, the injector further includes an electrical connector module which has first and second electrical connectors for connection with an associated one of the conductive elements for the actuators. The electrical connector module is mounted between the first and second actuators along the longitudinal axis of the injector body.
    Type: Grant
    Filed: April 29, 2014
    Date of Patent: September 26, 2017
    Assignees: Westport Power Inc., Delphi International Operations Luxembourg S.A.R.L.
    Inventors: George A. Meek, Lukhbir Panesar
  • Patent number: 9677520
    Abstract: A valve for metering fluid is reported which has a valve housing having a valve opening and a valve seat, a valve needle, which is provided for the alternating closing and opening of the valve using a closing member cooperating with the valve seat, a resetting element that acts on the valve needle for closing the valve and an electromagnet that is able to have current applied to it, having a magnet armature that is drivable to a lift motion, which sits axially displaceably on the valve needle and carries along the valve needle in the lift direction for opening the valve via a driving flange situated on it. To simplify production and the assembly of the valve while achieving the advantages characteristic in valves having a prestroke spring and an armature free path, the magnet armature is supported on the valve housing using a diaphragm spring.
    Type: Grant
    Filed: March 22, 2013
    Date of Patent: June 13, 2017
    Assignee: Robert Bosch GmbH
    Inventors: Martin Buehner, Michael Mayer, Michael Knorpp
  • Patent number: 9611951
    Abstract: A solenoid valve has: a valve body; a moving core with a valve body on one end; a guide tube slidably enclosing the moving core; a stationary core disposed in an inner circumference of an opposite end portion of the guide tube so as to face an opposite end of the moving core; a valve spring to urge the moving core in a direction away from the stationary core; an electromagnetic coil disposed to enclose the guide tube; and a magnetic plate disposed on an opposite end of the guide tube having a caulked portion. The guide tube has a caulked portion formed to fix in position the stationary core by engagement of the caulked portion with a recessed groove formed on an outer periphery of the stationary core. When the stationary core is fixed in position by the caulked portion, that surface of the stationary core which faces the magnetic plate is either flush with, or is protruding beyond, the opposite end of the guide tube.
    Type: Grant
    Filed: September 1, 2015
    Date of Patent: April 4, 2017
    Assignee: RINNAI CORPORATION
    Inventor: Kimihiro Yoshimura
  • Patent number: 9546627
    Abstract: In a support structure of a direct fuel injection valve capable of supporting a fuel injection valve stably for a long period of time, a valve housing is made of a metal and is provided with a first load bearing portion which is to be supported by an engine in an axial direction of the valve housing, a rear end portion of the fixed core is provided with a second load bearing portion which is to be supported by a resilient holding member in the axial direction, and the first and second load bearing portions are held between the engine and the resilient holding members with a forward set load applied to the resilient holding member by a fuel distribution pipe fitted to a fuel inlet tube and fixed to the engine.
    Type: Grant
    Filed: October 18, 2013
    Date of Patent: January 17, 2017
    Assignee: Keihin Corporation
    Inventors: Atsushi Okamoto, Atsushi Kamahora, Junichi Miyashita, Noriaki Sumisya
  • Patent number: 9429128
    Abstract: An objection of the present invention is to provide a fuel injection valve with a reduced variation in an injection amount and, in order to achieve this object, a method for adjusting stroke, the method being able to correct change in an amount of stroke caused by welding. In the method for adjusting the amount of stroke of a movable member of a fuel injection valve including a nozzle member having a seat face, a nozzle holder member to which the nozzle member is joined by welding, and the movable member having a valve seat portion for coming in contact with the seat face, the amount of stroke of the movable member is adjusted by plastically deforming a deformable portion provided to the nozzle holder member after joining the nozzle member and the nozzle holder member by welding.
    Type: Grant
    Filed: April 20, 2012
    Date of Patent: August 30, 2016
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Kenichi Gunji, Shin Onose, Takeshi Matsumaru, Katsuya Oonuki, Makoto Matsutate
  • Patent number: 9382884
    Abstract: A valve for metering fluid under pressure includes: a valve housing which has an inlet opening and a metering opening as well as a valve seat enclosing the metering opening having an outwardly pointing seat surface; a valve needle carrying a closing head; a valve-closing spring acting on the valve needle and applying the closing head to the valve seat; and an electrical actuator, which applies a compressive force to the valve needle, lifting the closing head outwardly away from the valve seat. To prevent transverse forces on the valve needle, which can cause a deflection of the valve needle, a gimbal-mounted spring disk, which is pushed onto the valve needle, is used as the valve-closing spring.
    Type: Grant
    Filed: April 7, 2014
    Date of Patent: July 5, 2016
    Assignee: ROBERT BOSCH GMBH
    Inventors: Dietmar Schmieder, Tilo Landenfeld
  • Patent number: 9366270
    Abstract: A damping valve arrangement is provided for controlling a pilot pressure that exerts influence on a control chamber of a damping device of a vibration damper through a control fluid, with an armature that is displaceable by the activity of an electrically energizable coil and provided in a housing, which armature includes a guide pin on which a first spring washer is provided and braces the guide pin. The first spring washer is designed for changing the area of a flow-through opening of the damping valve arrangement through which a control fluid is able to flow.
    Type: Grant
    Filed: December 12, 2013
    Date of Patent: June 14, 2016
    Assignee: WP Performance Systems GmbH
    Inventor: Johannes Wimmer
  • Patent number: 9316191
    Abstract: A valve assembly for an injection valve may comprise a valve body including a central longitudinal axis, the valve body comprising a cavity with a fluid inlet portion and a fluid outlet portion, a valve needle axially movable in the cavity, the valve needle preventing a fluid flow through the fluid outlet portion in a closing position and releasing the fluid flow through the fluid outlet portion in further positions, the valve needle comprising a ring element extending radially and arranged at an axial end of the valve needle facing away from the fluid outlet portion, and an electro-magnetic actuator unit being designed to actuate the valve needle.
    Type: Grant
    Filed: November 18, 2010
    Date of Patent: April 19, 2016
    Assignee: CONTINENTAL AUTOMOTIVE GMBH
    Inventor: Mauro Grandi
  • Patent number: 9188094
    Abstract: A fuel injector for fuel-injection systems of internal combustion engines includes an electromagnetic actuating element having a solenoid coil, a fixed core, an outer magnetic circuit component, and a movable armature for actuating a valve-closure element, which cooperates with a valve-seat surface provided on a valve-seat element. The injector is characterized by its extremely small outer dimensions. The flexibility in the installation of fuel injectors of varying valve lengths, which is made possible very simply due to the special modular design, is significantly increased in this manner. An optimized dimensioning of the electromagnetic circuit allows for a DFR (dynamic flow range) greater than 17, the DFR being defined as the quotient of qmax/qmin.
    Type: Grant
    Filed: July 26, 2011
    Date of Patent: November 17, 2015
    Assignee: ROBERT BOSCH GMBH
    Inventors: Juergen Graner, Martin Maier, Takuya Mizobe, Bernd Rieg, Volker Sohm, Juergen Lander
  • Patent number: 9127633
    Abstract: An actuator arrangement for an electromagnetically operated fuel injector includes a generally cylindrical actuator core having a longitudinal axis and defining an inner pole face of the actuator arrangement. The actuator core is formed of a bespoke magnetic material. A wire coil is disposed around the actuator core arranged to be connected to a power source to generate a magnetic field around the coil. A pole member is formed of a high strength material and defines an aperture for receiving the actuator core. The pole member defines an outer pole face of the actuator arrangement substantially co-planar with the inner pole face. An armature is movable in a direction parallel to the longitudinal axis in response to the magnetic field. The magnetic field passes into the armature in the region of the inner pole face and into the armature in the region of the outer pole face.
    Type: Grant
    Filed: March 18, 2010
    Date of Patent: September 8, 2015
    Assignee: Delphi International Operations Luxembourg S.A.R.L.
    Inventors: Thomas W. Canepa-Anson, Anthony Thomas Harcombe, Bashir Khan, Mark S. Graham, Mark S. Harper
  • Patent number: 9027859
    Abstract: A gas fuel injection valve is provided in which a circular recess is formed in a front end face of a valve plunger, the circular recess being surrounded by an annular land part, which is an outer peripheral part of the front end face, an inner peripheral face of the circular recess is formed in a tapered shape so as to increase in diameter in going from a base of the circular recess toward the annular land part, an annular lip is formed on a seating member, the annular lip being joined from the inner peripheral face through to the annular land part and being seated on a valve seat, and the annular lip is disposed so that an annular ridge line of an apex of the annular lip is positioned, in a projection in the axial direction of the valve plunger, above the inner peripheral face.
    Type: Grant
    Filed: September 21, 2011
    Date of Patent: May 12, 2015
    Assignee: Keihin Corporation
    Inventor: Naoto Takiguchi
  • Publication number: 20150102135
    Abstract: A valve assembly for an injection valve includes a valve body having a cavity with a fluid inlet portion and a fluid outlet portion, a valve needle axially movable in the cavity between a closing position preventing a fluid flow through the fluid outlet portion and further positions releasing the fluid flow through the fluid outlet portion, an electro-magnetic actuator unit that actuates the valve needle, and includes an axially movable armature in the cavity and a disc element fixedly coupled to the valve needle and configured to limit the axial movement of the armature relative to the valve needle towards the fluid outlet portion. An armature spring biases the armature away from the disc element for establishing a fluid-filled gap between the armature and the disc element. The armature is axially displaceable towards the disc element against the armature spring bias to reduce an axial size of the gap.
    Type: Application
    Filed: May 7, 2013
    Publication date: April 16, 2015
    Inventor: Ileana Romeo
  • Patent number: 8998116
    Abstract: An injector for injecting a reagent includes an electromagnet and an axially translatable valve member positioned within a housing. The valve member is moveable from a seated position to an unseated position in response to energizing the electromagnet. The valve member includes a hollow tube including a curled end having a reduced diameter sized to allow a ball to partially extend beyond the tube end but not pass through the tube. The tube includes an inwardly extending detent restricting the ball from movement within the tube. A pintle head is fixed to the tube and positioned proximate the electromagnet.
    Type: Grant
    Filed: September 7, 2012
    Date of Patent: April 7, 2015
    Assignee: Tenneco Automotive Operating Company Inc.
    Inventors: John M. Lowry, David Blumhardt, Eric Grant
  • Patent number: 8998114
    Abstract: A reagent injector with a cartridge design has a body with a reagent inlet, outlet, and a swirl chamber, which has an exit orifice that may be covered and uncovered by a solid, movable pintle. Reagent flows through the injector when the exit orifice is covered and uncovered to cool the injector. An insulator may be disposed between the injector body and a mounting flange connectable to an exhaust system. A flow path ensures cooling of an electromagnetic actuator. Reagent may bypass an orifice swirl chamber when the pintle blocks the exit orifice. Fluid may flow between an outside diameter of a pole piece and an inside diameter of an electromagnetic actuator, through an orifice chamber and return through a central bore housing a solid pintle, around which fluid may flow. Different inner injector body passages may direct fluid into an orifice distribution chamber and out to the solid pintle.
    Type: Grant
    Filed: February 9, 2011
    Date of Patent: April 7, 2015
    Assignee: Tenneco Automotive Operating Company, Inc.
    Inventors: Keith Olivier, Stephen Thomas, John Lowry
  • Publication number: 20150060576
    Abstract: A fuel injector includes a body, a main valve body, a sub valve body, an electric actuator, and a valve-opening force transmission mechanism. The body houses a main passage through which fuel flows to an injection, and a sub passage branched from the main passage and through which the fuel flows to the injection port. The main valve body opens or closes the main passage, and the sub valve body opens or closes the sub passage. The electric actuator applies a valve-opening force to the sub valve body. The valve-opening force transmission mechanism transmits the valve-opening force of the sub valve body to the main valve body to open the main valve body in a condition that a valve-opening stroke of the sub valve body is greater than or equal to a predetermined amount.
    Type: Application
    Filed: August 26, 2014
    Publication date: March 5, 2015
    Inventors: Yoshiharu NONOYAMA, Hiroaki NAGATOMO
  • Patent number: 8967502
    Abstract: A dual fuel injector may be used to injector both gas and liquid fuel into a cylinder of a compression ignition engine. An injector body defines a first set of nozzle outlets, a second set of nozzle outlets, a first fuel inlet and a second fuel inlet. A dual solenoid actuator includes a first armature, a first coil, a second armature and a second coil that share a common centerline. The dual solenoid actuator has a non-injection configuration at which the first armature is at an un-energized position and the second armature is at an un-energized position. The dual solenoid actuator has a first fuel injection configuration at which the first fuel inlet is fluidly connected to the first set of nozzle outlets, the first armature is at an energized position and the second armature is at the un-energized position.
    Type: Grant
    Filed: May 11, 2011
    Date of Patent: March 3, 2015
    Assignee: Caterpillar Inc.
    Inventors: Hoisan Kim, Mark F. Sommars, Xiangdong Ding
  • Patent number: 8931718
    Abstract: A valve assembly for an injection valve may include a valve body comprising a cavity with a fluid inlet portion and a fluid outlet, and a valve needle axially movable in the cavity, the valve needle preventing a fluid flow through the fluid outlet in a closing position and releasing the fluid flow through the fluid outlet in further positions, the valve needle comprising a radially extending protrusion and an electro-magnetic actuator unit configured to actuate the valve needle and comprising an armature in the cavity. The armature comprises an armature cavity having a first stop surface and a second stop surface that faces the first stop surface. The protrusion of the valve needle is arranged in the armature cavity axially between the first stop surface and the second stop surface such that a relative movement between the valve needle and the armature in axial direction is limited.
    Type: Grant
    Filed: June 15, 2012
    Date of Patent: January 13, 2015
    Assignee: Continental Automotive GmbH
    Inventors: Mauro Grandi, Valerio Polidori, Cristiano Mannucci
  • Patent number: 8919675
    Abstract: At the downstream-side face of an injection hole plate, a plurality of concaves are arranged corresponding to a plurality of injection holes; at least part of an injection hole outlet opens at the plain of the concave; the rest of the outlet opens at the downstream side face of the injection hole plate or contacts the inner surface of the concave. In a flow path formed by the injection hole, there is provided a cylindrical portion, whose cross section is the radially minimum cross section of the injection hole, from the upstream side face of the injection hole plate to the plain of the concave. Where D1 denotes the diameter of the injection hole and D2 denotes the diameter of the concave or the diameter of the concave in the circumferential direction of the virtual circle, the relationship 1.1<(D2/D1)<3.0 is satisfied.
    Type: Grant
    Filed: October 24, 2011
    Date of Patent: December 30, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yukitaka Sakata, Naoya Hashii, Kyosuke Watanabe, Tsuyoshi Munezane
  • Patent number: 8919674
    Abstract: A fuel injection valve that promotes formation of thin membranes of fuel within injection holes and promotes atomization of spray is obtained. Holes provided in an injection hole plate 11 are combined injection holes 16 formed by partially overlapping two or more single injection holes 15a, 15b, 15c from an upstream side to a downstream side of the injection hole plate 11, each of the single injection holes is a circular hole, the single injection hole has an injection hole angle ? defined by a tilt angle of a center axis line connecting an entrance part center and an exit part center relative to a plate thickness direction of the injection hole plate 11, areas of exit parts 16b are larger than areas of entrance parts 16a in the combined injection holes 16, and the combined injection holes 16 are formed by press working.
    Type: Grant
    Filed: March 16, 2011
    Date of Patent: December 30, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kyosuke Watanabe, Naoya Hashii, Tsuyoshi Munezane
  • Patent number: 8888024
    Abstract: A fuel injection valve for an internal combustion engine is provided. The fuel injection value includes an injection hole plate having a plurality of fuel chambers formed by recessing part of the upstream side of the injection hole plate at a plurality of positions along the valve seat opening portion. Each of the fuel chambers has a shape in which the halves are symmetric with each other with respect to a line that radially extends from the center of the injection hole plate. The fuel chambers are is disposed in a place that ranges from the inside of a virtual circle to the outside of the inner circumference of the valve seat opening portion. Two injection holes are arranged outside the inner circumference of the valve seat opening portion in such a way as to flank the radial center line of the fuel chamber.
    Type: Grant
    Filed: September 24, 2013
    Date of Patent: November 18, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Naoya Hashii, Tsuyoshi Munezane
  • Patent number: 8833678
    Abstract: The electromagnetically operatable valve, in particular a fuel injector for fuel injection systems of internal combustion engines, has a magnetic circuit having a core, a solenoid, a bobbin accommodating the winding of the solenoid, an armature, which operates a valve closing body cooperating with a fixed valve seat and is drawn against the core when the solenoid is excited, and having an armature-side flow guide element. The bobbin is designed and situated in such a way that magnetic isolation between the core and the armature-side flow guide element is ensured. The valve is suitable in particular for use in fuel injection systems of mixture-compressing, externally ignited internal combustion engines.
    Type: Grant
    Filed: October 30, 2006
    Date of Patent: September 16, 2014
    Assignee: Robert Bosch GmbH
    Inventor: Ferdinand Reiter
  • Patent number: 8770498
    Abstract: A fuel injector includes a solenoid coil, which cooperates with an armature acted upon by a restoring spring, the armature forming an axially displaceable valve part together with a valve needle. A valve-closure member, which forms a sealing seat together with a valve-seat body, is provided on the valve needle. Furthermore, a reliable sealing of a thin-walled valve sleeve or of the magnetic coil exists that is made of a sealing body that is secured beneath the magnetic coil. The sealing body is tetragonal in cross-section, in particular, it has a trapezoid-like shape, and is put in between the magnetic coil and a valve housing. In its installed state, the sealing body is clamped and compressed. In its compressed state, the sealing body assumes an elliptical or egg-shaped cross-section.
    Type: Grant
    Filed: July 26, 2006
    Date of Patent: July 8, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Ferdinand Reiter, Christof Vogel, Chris Louis, Gerald Scheday
  • Publication number: 20140175195
    Abstract: A valve for metering a flowing medium, e.g., an injection valve for fuel-injection systems of internal combustion engines, is provided. In an embodiment, the valve has a sealing seat formed by a valve seat and a sealing head of a valve member able to be driven to execute lift motions. The valve has a plurality of spray orifices having hole-entry openings situated downstream from the sealing seat and sealable by the sealing seat. The valve has flow-through channels situated upstream from the sealing seat, which extend parallel to each other and discharge in front of the sealing seat. In order to achieve a unified upstream flow approach of all hole-entry openings of the spray orifices, e.g., if the number of spray orifices and flow-through channels differs, an upstream-flow shaper having at least one flow-through opening is situated between sealing seat and hole-entry openings of the spray orifices.
    Type: Application
    Filed: April 25, 2012
    Publication date: June 26, 2014
    Inventor: Marco Vorbach
  • Patent number: 8740113
    Abstract: A reagent injector with a cartridge design has a body with a reagent inlet, outlet, and a swirl chamber, which has an exit orifice that may be covered and uncovered by a solid, movable pintle. Reagent flows through the injector when the exit orifice is covered and uncovered to cool the injector. An insulator may be disposed between the injector body and a mounting flange connectable to an exhaust system. A flow path ensures cooling of an electromagnetic actuator. Reagent may bypass an orifice swirl chamber when the pintle blocks the exit orifice. Fluid may flow between an outside diameter of a pole piece and an inside diameter of an electromagnetic actuator, through an orifice chamber and return through a central bore housing a solid pintle, around which fluid may flow. Different inner injector body passages may direct fluid into an orifice distribution chamber and out to the solid pintle.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: June 3, 2014
    Assignee: Tenneco Automotive Operating Company, Inc.
    Inventors: Matthew L. Roessle, Thomas P. Mallin, Rick Simpson, Stephen Thomas, Keith Olivier, John Lowry
  • Patent number: 8729995
    Abstract: In one aspect, a fuel injector includes an injector body that defines a fuel inlet, a drain outlet and a nozzle outlet. A direct operated check valve is positioned in the injector body and includes a needle valve member with an opening hydraulic surface exposed to fluid pressure in a nozzle supply passage, and a closing hydraulic surface exposed to fluid pressure in a needle control chamber. The needle valve member is movable between a first position at which the nozzle supply passage is blocked to the nozzle outlet, and a second position at which the nozzle supply passage is open to the nozzle outlet. A needle control valve is positioned in the injector body and includes a control valve member movable between a first position at which the needle control chamber is fluidly connected to the drain outlet, and a second position at which the needle control chamber is fluidly blocked to the drain outlet.
    Type: Grant
    Filed: December 20, 2010
    Date of Patent: May 20, 2014
    Assignee: Caterpillar Inc.
    Inventors: Jayaraman Venkataraghavan, John McDonnell, Nadeem Bunni, Christopher D. Hanson
  • Publication number: 20140124603
    Abstract: In an electromagnetic fuel injection valve which is configured to absorb an unbalanced load applied to sliding portions between a fixed core and a valve stem, thereby enabling a reduction in a frictional resistance of the sliding portions, a guide bush is press fitted in an inner peripheral surface of the fixed core, the valve element includes a valve part configured to cooperate with the valve seat, and the valve stem continuously provided to the valve part and extending toward the guide bush, a sliding member configured to be slidably fitted to an inner peripheral surface of the guide bush is press fitted on the valve stem, wherein an annular gap is provided at least at one of a location between the fixed core and the guide bush and a location between the valve stem and the sliding member, within sliding regions of the guide bush and the sliding member.
    Type: Application
    Filed: November 1, 2013
    Publication date: May 8, 2014
    Applicant: KEIHIN CORPORATION
    Inventors: Junya SUZAKA, Keisuke MACHIDA, Daisuke KONDO, Ryosuke TAKENAKA
  • Patent number: 8662472
    Abstract: In an electromagnetic fuel injection valve, a valve housing includes: a cylinder-shaped valve seat member having a valve seat in its front end portion; a magnetic cylindrical body coaxially connected to a rear end portion of the valve seat member; a nonmagnetic cylindrical body coaxially and liquid-tightly welded to a rear end of the magnetic cylindrical body; and a hollow cylindrical stationary core coaxially and liquid-tightly welded to a rear end of the nonmagnetic cylindrical body. A valve assembly is housed in the valve housing and includes: a valve body capable of being seated on the valve seat; and a movable core connected to a rear end of the valve body and opposed to a front end of the stationary core. The valve body and the valve seat member are respectively made of different martensitic stainless steels so that a hardness of the valve body is higher than that of the valve seat member.
    Type: Grant
    Filed: June 22, 2009
    Date of Patent: March 4, 2014
    Assignee: Keihin Corporation
    Inventors: Katsuyuki Suzuki, Gen Kato, Junichi Miyashita, Kenichi Tsunota
  • Patent number: 8646749
    Abstract: An electromagnetically actuatable valve, e.g., a fuel injector for fuel injection systems, includes an electromagnetic actuating element having a solenoid, a fixed core, a valve jacket, and a movable armature for actuating a valve closing body, which cooperates with a valve seat surface provided on a valve seat body. In addition, the valve has a restoring spring for resetting the valve closing body to its resting position on the valve seat surface. The restoring spring and an internal longitudinal bore hole of the armature are paired in such a way that the armature is guided during its axial movement only along the restoring spring.
    Type: Grant
    Filed: September 26, 2008
    Date of Patent: February 11, 2014
    Assignee: Robert Bosch GmbH
    Inventor: Ferdinand Reiter
  • Patent number: 8616474
    Abstract: An injector (10) includes a valve body (16) having an interior portion (18) and a seat (32). An armature tube (20) is in the interior portion. A spring (28) biases a valve member (24) into engagement with the seat. A movable armature (40) is coupled to the armature tube. A calibration member (36) is engaged with the valve member and engaged with the spring. A stator (52) is coupled to an inlet tube (41) and has an end surface spaced from an end surface of the armature in the closed position of the injector, thereby defining an air gap (54) between the end surfaces. A coil (56) is disposed about a portion of the inlet tube. A housing (64) surrounds at least a portion of the coil. Magnetic flux causes the armature and armature tube to push the valve member off the seat.
    Type: Grant
    Filed: September 9, 2011
    Date of Patent: December 31, 2013
    Assignee: Continental Automotive Systems, Inc.
    Inventor: Perry Robert Czimmek
  • Patent number: 8616473
    Abstract: An injector (10) includes a valve body (16), an armature tube (20) in the valve body, a seal disk (24) carried by the armature tube, a spring (30) associated with the seal disk, a seat (34) defining an outlet. The seat includes a seat surface (38) engaged with the seal disk that is biased by the spring, when the injector is in a closed position, preventing fuel from exiting the outlet. A movable armature (42) is coupled to an end of the armature tube. An adjusting tube (48) engages an end of the spring. An inlet tube (50) defining an inlet has an end surface that is spaced from the periphery of the armature in the closed position. An electromagnetic coil (58) is disposed about a portion of the inlet tube. A flux member (60) is associated with the coil. A housing (62) covers at least a portion of coil.
    Type: Grant
    Filed: September 9, 2011
    Date of Patent: December 31, 2013
    Assignee: Continental Automotive Systems, Inc.
    Inventor: Perry Robert Czimmek
  • Patent number: 8602319
    Abstract: A fuel injector includes an injector body with a tip component that defines at least one nozzle outlet. A needle valve member is positioned in the injector body and includes a frustoconical segment positioned in a frustoconical bore to separate a needle control chamber from a nozzle chamber. The needle valve member includes an opening hydraulic surface exposed to fluid pressure in the nozzle chamber, and a closing hydraulic surface exposed to fluid pressure in the needle control chamber. The frustoconical bore and the frustoconical segment have a narrowing taper in the direction of an injector tip. The frustoconical features tend to slow the initial opening of the nozzle outlets, and hasten their closure relative to a counterpart injector with cylindrical needle guide features.
    Type: Grant
    Filed: October 7, 2010
    Date of Patent: December 10, 2013
    Assignee: Caterpillar Inc.
    Inventor: Jeffrey De Payva
  • Patent number: 8596562
    Abstract: A fuel injector for fuel ignition systems of internal combustion engines includes a magnetic circuit having a core, a magnetic coil and an armature, and a movable valve needle, which has a valve-closure member that cooperates with a fixed valve seat, the valve seat being shaped on a valve-seat member and being provided with a valve-seat support in which the valve-seat member is inserted. At least one metallic component of the fuel injector, in this context, has a serrated structure on its outer circumference for producing a solid connection to a corresponding component made of plastic. The plastic components may be the connection piece, the valve-seat support, the coil shell and the connecting pipe of the valve needle. The fuel injector is particularly suitable for use in fuel-injection systems of mixture-compressing internal combustion engines having externally supplied ignition.
    Type: Grant
    Filed: August 10, 2012
    Date of Patent: December 3, 2013
    Assignee: Robert Bosch GmbH
    Inventor: Ferdinand Reiter
  • Patent number: 8567701
    Abstract: A fuel injection valve for an internal combustion engine is provided. The fuel injection value includes an injection hole plate having a plurality of fuel chambers formed by recessing part of the upstream side of the injection hole plate at a plurality of positions along the valve seat opening portion Each of the fuel chambers has a shape in which the halves are symmetric with each other with respect to a line that radially extends from the center of the injection hole plate. The fuel chambers are is disposed in a place that ranges from the inside of a virtual circle to the outside of the inner circumference of the valve seat opening portion. Two injection holes are arranged outside the inner circumference of the valve seat opening portion in such a way as to flank the radial center line of the fuel chamber.
    Type: Grant
    Filed: October 30, 2009
    Date of Patent: October 29, 2013
    Assignee: Mitsubishi Electric Corporation
    Inventors: Naoya Hashii, Tsuyoshi Munezane