Needle-type Projection Patents (Class 239/585.5)
  • Patent number: 10975820
    Abstract: A fuel injection valve includes: a circular plate portion that is abuttable against an end surface of a needle opposite from a valve seat while the needle being provided to open and close an injection hole upon lifting and seating of the needle relative to the valve seat; and a tubular portion that extends from the circular plate portion toward the valve seat and has an end part, which is opposite from the circular plate portion and is abuttable against a movable core second contact surface of a movable core opposite from the valve seat. In a state where the circular plate portion abuts against the needle, and the tubular portion abuts against the movable core, a gap is formed between a flange member end surface of a flange of the needle and a movable core first contact surface of the movable core opposite from the valve seat.
    Type: Grant
    Filed: July 22, 2019
    Date of Patent: April 13, 2021
    Assignee: DENSO CORPORATION
    Inventors: Tomoji Matsukawa, Eiji Itoh, Shinsuke Yamamoto, Kouichi Mochizuki
  • Patent number: 10767783
    Abstract: A method for actuating a valve with a magnetic valve drive, through which electric current is passed to open the valve, to close the valve, and to hold the valve in an open or closed position, includes receiving an opening signal. The method further includes varying the electric current that is passed through the valve drive as a first current signal to open the valve in response to the received opening signal. The method further includes receiving a closing signal and varying the electric current that is passed through the valve drive as a second current signal for closing the valve in response to the received closing signal. The second current signal has at least two variations of the electric current at separate times.
    Type: Grant
    Filed: May 8, 2018
    Date of Patent: September 8, 2020
    Assignee: Robert Bosch GmbH
    Inventor: Michael Hilden
  • Patent number: 10711750
    Abstract: A valve for metering a fluid. An armature of the electromagnetic actuator is movable along a longitudinal axis of a valve needle, the movement of the armature relative to the valve needle being limited by a stop surface on the valve needle. The armature has a passage channel. The stop surface is on a stop element. The stop element and the armature are such that during operation there always remains an intermediate space, adjoining the valve needle, between the stop element and an end face of the armature facing the stop element. The stop surface lies, in a contact region, on the end surface of the armature facing the stop element when the armature and the stop surface come into contact during operation, the contact region being situated between the intermediate space and an opening of the passage channel when the armature and the stop surface come into contact.
    Type: Grant
    Filed: June 21, 2017
    Date of Patent: July 14, 2020
    Assignee: Robert Bosch GmbH
    Inventors: Andreas Schaad, Joerg Abel, Juergen Maier, Martin Buehner, Matthias Boee, Olaf Schoenrock, Philipp Rogler, Stefan Cerny
  • Patent number: 10711754
    Abstract: A valve assembly for a pump includes an electrical actuator having a stator and an armature, where the armature includes a top armature surface facing the stator and having an inwardly stepped-up profile that forms a raised surface at a radially inward location, and a lower, gap-forming surface at a radially outward location that forms a gap between the armature and the stator when the electrical actuator is activated to facilitate displacing fluid and avoiding production of high velocity, potentially damaging fluid flows.
    Type: Grant
    Filed: December 6, 2017
    Date of Patent: July 14, 2020
    Assignee: Caterpillar Inc.
    Inventors: Bryan Edward Nelson, Sana Mahmood, Stephen R Lewis
  • Patent number: 10527015
    Abstract: An electrical connector assembly of a fuel injector includes a body with external walls defining an internal volume and an internal wall dividing the connector in a first part adapted to be fixed in a complementary engagement with the body of the injector and, in a second part adapted to receive another electrical connector. The electrical connector assembly also includes at least one electrical terminal extending through the internal wall from an inner extremity protruding in the inner volume of the first part of the body, to an outer extremity protruding in the outer volume of the second part of the body. The outer extremity is shaped to receive in a complementary engagement an electrical terminal of said another electrical connector. The connector assembly is adapted to be in fluid communication with the back leak return conduit of the injector.
    Type: Grant
    Filed: March 25, 2015
    Date of Patent: January 7, 2020
    Assignee: DELPHI TECHNOLOGIES IP LIMITED
    Inventors: Eric Miny, Jean-Etienne Blanc, Xavier Lale, Samuel Sarmezan, Fabrizio Bonfigli
  • Patent number: 10519909
    Abstract: A fluid metering valve includes a valve-seat surface; a valve closing element that interacts with the valve-seat surface in order to form a sealing seat; an electromagnetic actuator; a valve needle used for operating the valve-closing element; an armature that is guided on the valve needle and is used for opening or closing the sealing seat; at least one stop that is disposed on, and stationary relative to, the valve needle and that restricts a movement of the armature on the valve needle; and at least one damping element that is configured to provide a damping during the opening or closing of the sealing seat, has a volume that is able to be filled with a fluid medium, is configured such that a fluid medium can be exchanged between the volume and an environment of the damping element, and is configured for volume changes of the volume in order to enable the damping.
    Type: Grant
    Filed: June 23, 2016
    Date of Patent: December 31, 2019
    Assignee: Robert Bosch GmbH
    Inventors: Andreas Schaad, Joerg Abel, Juergen Maier, Martin Buehner, Matthias Boee, Olaf Schoenrock, Philipp Rogler, Stefan Cerny
  • Patent number: 10240567
    Abstract: A fuel injection valve includes a valve body, a coil, an inner fixed iron core that is arranged on an inner peripheral side of the coil, and an outer fixed iron core that is arranged on an outer peripheral side of the coil. The fuel injection valve also includes a movable element that is configured to be attracted to the inner fixed iron core and the outer fixed iron core, wherein the movable element is configured to be separable from the valve body and is configured to move the valve body.
    Type: Grant
    Filed: July 3, 2017
    Date of Patent: March 26, 2019
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Yoshihito Yasukawa, Hideharu Ehara, Tohru Ishikawa, Motoyuki Abe, Ryo Kusakabe
  • Patent number: 9995262
    Abstract: A fluid injection valve has a valve needle and an electromagnetic actuator assembly with a pole piece and an armature. The valve needle includes a retainer element for limiting an axial displacement of the armature with respect to the valve needle in a first axial direction. The pole piece has a central opening with a step so that it has a first section in which a first portion of the retainer element is arranged and a second section for receiving a second portion of the retainer element. The first section of the central opening has a smaller cross-sectional area than the second section.
    Type: Grant
    Filed: August 14, 2014
    Date of Patent: June 12, 2018
    Assignee: Continental Automotive GmbH
    Inventors: Mauro Grandi, Francesco Lenzi, Valerio Polidori, Stefano Filippi
  • Patent number: 9885328
    Abstract: A bush is disposed on an inner wall of a fixed core. A second spring, which biases a movable core in a valve-closing direction, has one end abutting the bush. The bush is formed separately from the fixed core, and is formed to be movable relative to the fixed core when adjusting a biasing force of the second spring. When a needle is abutting a valve seat, a gap is formed between a movable core first abutting face of the movable core and a flange end face of a flange portion included in the needle. Accordingly, during valve-opening, a relatively large force in a valve-opening direction is applied to the needle. Further, by changing the position of the bush relative to the movable core, the biasing force of the second spring may be adjusted without changing a length of the gap in a central axis direction.
    Type: Grant
    Filed: September 17, 2015
    Date of Patent: February 6, 2018
    Assignee: DENSO CORPORATION
    Inventors: Tomoji Matsukawa, Hiroyuki Inoue
  • Patent number: 9726127
    Abstract: A fuel injection valve includes a valve body, a coil, an inner fixed iron core that is arranged on an inner peripheral side of the coil, and an outer fixed iron core that is arranged on an outer peripheral side of the coil. The fuel injection valve also includes a movable element that is configured to be attracted to the inner fixed iron core and the outer fixed iron core, wherein the movable element is configured to be separable from the valve body and is configured to move the valve body.
    Type: Grant
    Filed: November 30, 2016
    Date of Patent: August 8, 2017
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Yoshihito Yasukawa, Hideharu Ehara, Tohru Ishikawa, Motoyuki Abe, Ryo Kusakabe
  • Patent number: 9651011
    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: Grant
    Filed: May 7, 2013
    Date of Patent: May 16, 2017
    Assignee: CONTINENTAL AUTOMOTIVE GMBH
    Inventor: Ileana Romeo
  • Patent number: 9546630
    Abstract: An injection valve for injecting fuel into a combustion chamber includes: a housing having at least one spray discharge orifice on a discharge side; a solenoid coil; a magnet armature linearly movable by the solenoid coil; a valve needle for opening and closing the spray discharge orifice, which valve needle projects through the magnet armature and is linearly movable along a longitudinal axis, the magnet armature being linearly movable in relation to the valve needle between a first stop and a second stop, the second stop being formed by a stop element having a stop face and a counter element having a counter face situated opposite the stop face, the stop element having an elastic design so that an angle between the longitudinal axis and the stop face is changed when the counter face strikes the stop face.
    Type: Grant
    Filed: July 26, 2013
    Date of Patent: January 17, 2017
    Assignee: ROBERT BOSCH GMBH
    Inventors: Walter Maeurer, Anselm Berg, Friedrich Moser, Philipp Rogler, Juergen Graner, Olaf Schoenrock
  • Patent number: 9534573
    Abstract: An object of the invention is to provide a fuel injection valve that applies a swirl to an upstream side of a seat section to shorten spray penetration. When flows into injection hole entries are indicated by arrows 101a to 106a and injection hole exit directions are indicated by arrows 201 to 206, an angle ? defined by the inflow direction 101a and the exit direction 201 of an injection hole 71 can be increased. In a method for applying the twisted angle ?, a side groove 15a on an outer peripheral side of a guide member 12a is set to be accompanied with a twist with respect to an axis O1. Furthermore, a flow passage area of the side groove 15a is set smaller than a flow passage area on an upstream side of the guide member 12a and is also set larger than a flow passage area of a seat section 7B that is constructed by a gap between a valve body 7 and an orifice cup 7.
    Type: Grant
    Filed: January 24, 2014
    Date of Patent: January 3, 2017
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Kiyotaka Ogura, Hideharu Ehara, Motoyuki Abe, Eiji Ishii, Masanori Mifuji, Atsushi Takaoku, Takao Miyake
  • Patent number: 9512810
    Abstract: An object of the present invention is to prevent a short circuit and disconnection between coil wires 52 in a crossing portion 52c in a solenoid device 5 of a fuel injection valve 1 that has a structure in which the coil wires 52 intersect with each other on a winding initiation side 52a and a winding completion side 52b of the coil wires 52. A groove that is deeper in depth than the coil wire 52 is disposed in a bobbin 53, around which the coil wire 52 is wound, and the winding initiation side and the winding completion side of the coil wire is separated into upper and lower stages of a groove portion in the crossing portion.
    Type: Grant
    Filed: April 18, 2012
    Date of Patent: December 6, 2016
    Assignee: Mitsubishi Electric Corporation
    Inventors: Akio Shingu, Keishi Nakano, Tsuyoshi Munezane
  • Patent number: 9470194
    Abstract: An injector for injecting fuel into an internal combustion engine includes a drive unit accommodated in a housing and which has an armature guided in sliding manner in the housing, and includes a valve element that is axially movable in the armature relative to the armature. The valve element has a driver element for a coupling to the armature and can be moved in order to open and/or close at least one injection opening, wherein the opening movement is limited by an abutment surface. A flange-like abutment member is fixedly connected to the valve element, and is designed such that, during the opening of the at least one injection opening, a first hydraulic damping layer is formed between said abutment member and the abutment surface, and during the closing of the at least one injection opening, a second hydraulic damping layer is formed between said abutment member and the armature.
    Type: Grant
    Filed: August 19, 2013
    Date of Patent: October 18, 2016
    Assignee: CONTINENTAL AUTOMOTIVE GMBH
    Inventors: Xaver Gebhardt, Anatoliy Lyubar
  • Patent number: 9402946
    Abstract: A liquid ejecting apparatus includes: an inflow channel to which liquid is supplied; an outflow channel communicated with a nozzle; a liquid chamber formed with a spiral flow channel having a substantially constant cross-sectional area between the inflow channel and the outflow channel and having a given volume; a volume changing portion configured to deform the liquid chamber so as to change the volume of the liquid chamber to a volume smaller than the given volume; and an ejection control unit configured to cause the liquid to be ejected from the nozzle in a pulsed manner by driving the volume changing portion in a state in which the liquid chamber is filled with the liquid.
    Type: Grant
    Filed: November 21, 2014
    Date of Patent: August 2, 2016
    Assignee: Seiko Epson Corporation
    Inventors: Takeshi Seto, Hirokazu Sekino, Kazuaki Uchida, Kazuo Kawasumi
  • Patent number: 9376994
    Abstract: A valve assembly for an injection valve includes a valve body including 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 a further position, an upper retainer arranged in the cavity and fixed to the valve needle, and an electro-magnetic actuator unit configured to actuate the valve needle, the electro-magnetic actuator unit comprising an armature, arranged in the cavity and axially movable relative to the valve needle, the armature configured to be coupled to the upper retainer when the valve needle is actuated to leave the closing position, and a permanent magnet arranged in the cavity adjacent the position of the armature when the valve needle is in its closing position.
    Type: Grant
    Filed: September 29, 2011
    Date of Patent: June 28, 2016
    Assignee: CONTINENTAL AUTOMOTIVE GMBH
    Inventors: Mauro Grandi, Valerio Polidori, Cristiano Mannucci
  • Patent number: 9366208
    Abstract: A fuel injector body has a fuel chamber and a valve seat around a fuel outlet. A valve body is positioned at the valve seat and a valve stem extends through the fuel outlet and fuel chamber. Engagement (disengagement) of valve body and valve seat closes (opens) the injector. The fuel chamber can comprise primary and secondary chambers connected by a valve passage and a metering member that restricts fuel flow between the chambers, thereby providing a flow-dependent closing force that reduces the dependence of fuel flow through the injector on fuel inlet pressure and that makes that flow dependent on an injector actuating force. The injector body or the valve body can comprise a spray-shaping surface arranged at least partly around the valve seat, which spray-shaping surface is arranged to direct a spray of fuel flowing through the fuel outlet.
    Type: Grant
    Filed: February 6, 2015
    Date of Patent: June 14, 2016
    Inventor: Andrew E Meyer
  • Patent number: 9297471
    Abstract: An armature chamber receives an armature and includes a first armature chamber, which is placed adjacent to one end surface of the armature and is communicated with a spring chamber, and a second armature chamber, which is placed adjacent to the other end surface of the armature, which is opposite from the one end surface of the armature. The armature includes a primary communication passage that communicates between the first armature chamber and the second armature chamber. An opening end of the primary communication passage, which opens on a side where the first armature chamber is located, is placed at a corresponding location of the armature, which is opposed to the spring chamber.
    Type: Grant
    Filed: May 16, 2013
    Date of Patent: March 29, 2016
    Assignees: DENSO CORPORATION, NIPPON SOKEN, INC.
    Inventors: Fumiaki Arikawa, Naoki Mitsumata
  • Patent number: 9261049
    Abstract: A metering system for a fuel atomizer includes a housing, first and second metering members, and at least one solenoid. The housing includes a mixing chamber. The first metering member is operable to control flow of oxidizer to the mixing chamber. The second metering member is arranged coaxial with the first metering member and operable to control flow of fuel to the mixing chamber. The at least one solenoid is configured to operate at least one of the first and second metering members.
    Type: Grant
    Filed: September 25, 2012
    Date of Patent: February 16, 2016
    Assignee: ENGINETICS, LLC
    Inventors: Thomas Huettner, Joseph Lull, Justin Warner
  • Patent number: 9194345
    Abstract: A fuel injection device includes a fuel injector and a control portion. The fuel injector is inserted into an attachment hole which is placed at a predetermined position of a cylinder head. The fuel injector has a housing in which a coil is provided. At least a part of the housing which accumulates the coil is surrounded over the whole circumference by an inner circumference surface of the attachment hole. The control portion has an increasing control portion and a holding control portion. The increasing control portion increases a current flowing through the coil to a first target value. The holding control portion holds the current to the first target value.
    Type: Grant
    Filed: November 4, 2013
    Date of Patent: November 24, 2015
    Assignee: DENSO CORPORATION
    Inventor: Keita Imai
  • Patent number: 9175655
    Abstract: A method of fabricating an injector of a combustion engine includes providing a first base body and a second base body for a valve needle of the injector, forming the first base body such that a first base part with a first stop face is formed, providing an armature with a bore, forming the second base body such that a second base part with a second stop face and a third stop face is formed, disposing a section of the first base part and a section of the second base part in a bore of the armature, disposing the first and second base parts relative to each other such that the first stop face abuts the second stop face, and establishing a fixed coupling between the first and second base parts, wherein the armature is movable between the first stop face and the third stop face.
    Type: Grant
    Filed: October 7, 2014
    Date of Patent: November 3, 2015
    Assignee: CONTINENTAL AUTOMOTIVE GMBH
    Inventors: Stefano Filippi, Mauro Grandi, Francesco Lenzi, Valerio Polidori
  • Patent number: 9140224
    Abstract: An apparatus and method for controlling fluid flow is disclosed. An electromagnetic actuator may include a stator having an inner pole member and an outer pole member. The outer pole member may have a fluid passageway therein for transmitting fluid through the outer pole member. The actuator may further include a coil disposed around the inner pole member and arranged between the inner pole member and the outer pole member. The actuator may also include an armature moveable under the influence of a magnetic field generated by the stator and coil and operable to affect transmission of the fluid through the fluid passageway.
    Type: Grant
    Filed: June 17, 2005
    Date of Patent: September 22, 2015
    Assignee: Caterpillar Inc.
    Inventors: Harish K Krishnaswamy, Nadeem N Bunni, Stephen R Lewis, Dana R Coldren
  • Publication number: 20150136879
    Abstract: The invention relates to a fuel injector having an electromagnet 2 which contains a magnet core 6 and a coil 7 and which further has an armature 9 that is guided on an armature pin 8. The armature pin 8 is guided in a guide sleeve 11 which projects into the electromagnet 2. The fuel injector further has an injector body 4 with at least one injection opening which is introduced into the injector body 4 and which is controlled by an injector needle 5. The aim of the invention is to provide a fuel injector which is functionally improved with respect to the switching times of the fuel injector and the forces that can be generated in the fuel injector while simultaneously simplifying a guide sleeve for an armature pin. This is achieved in that the guide sleeve 11 is integrated into the magnet core 6 and is connected to the magnet core 6 in a formfitting or bonded manner.
    Type: Application
    Filed: April 5, 2013
    Publication date: May 21, 2015
    Inventors: Jochen Rager, Andreas Buergel, Joachim Fleuren, Bernd Reinsch, Johannes Schmid, Dieter Maier, Helmut Sattmann, David Holzer, Andreas Stimmeder, Dieter Deutsch
  • Publication number: 20150129687
    Abstract: A fuel injector has a valve nozzle defining a fuel-injection port downstream of a fuel passage. The fuel-injection port is inclined toward a nozzle periphery from a fuel-inlet to a fuel-outlet. A valve needle is capable of moving in a valve-opening direction to open the fuel-injection port so that a fuel flowing into the fuel-inlet from the nozzle periphery is injected into an internal combustion engine. The fuel-injection port has an upstream-portion defining the fuel-inlet, and a downstream-portion defining the fuel-outlet. The downstream-portion is smoothly connected to the upstream-portion at a position most close to a center of the valve nozzle, and the downstream-portion is offset toward the nozzle periphery relative to the upstream-portion, so that the upstream-portion and the downstream-portion forms a step surface therebetween. The step surface is eccentric to a center line of the upstream-portion.
    Type: Application
    Filed: November 6, 2014
    Publication date: May 14, 2015
    Inventor: Hiroki KANETA
  • Publication number: 20150108246
    Abstract: A fuel electro-injector for a fuel injection system for an internal combustion engine, having an atomizer equipped with a nozzle and a valve needle defining a discharge section that is annular and has a width that continuously increases as the opening stroke of the valve needle proceeds. The opening stroke is directed outwards and is caused, in a proportional manner, by the operation of an electric actuator. The electro-injector has a high-pressure environment with an annular passageway around the lateral outer surface of the valve needle to supply fuel to the discharge section, and a low-pressure environment, which communicates with a fuel outlet and is separated from the high-pressure environment by a dynamic seal between the valve needle and the nozzle.
    Type: Application
    Filed: October 20, 2014
    Publication date: April 23, 2015
    Applicant: C.R.F. Societa' Consortile per Azioni
    Inventors: Sergio Stucchi, Onofrio De Michele, Raffaele Ricco, Marcello Gargano, Carlo Mazzarella
  • 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
  • Patent number: 8998115
    Abstract: An injection valve for injecting fuel into an internal combustion engine may include an actuator, an injection needle associated with a sealing seat, and a transmission unit that establishes an effective connection between the actuator and the injection needle. The transmission unit may include a pressure chamber including two movable pistons that are guided within a movable pot. The first piston may be guided through a bottom of the pot while maintaining a first sealing gap, and the second piston may be guided within a sleeve section of the pot while maintaining a second sealing gap. One piston may be effectively connected to the injection needle, while the other piston may be effectively connected to the actuator.
    Type: Grant
    Filed: June 10, 2010
    Date of Patent: April 7, 2015
    Assignee: Continental Automotive GmbH
    Inventors: Sven Jaime Salcedo, Michael Knoller
  • Publication number: 20150090225
    Abstract: A fuel injection valve includes: a needle valve including a seat portion in a front end side; a nozzle body including a seat surface on which the seat portion sits, and including an injection hole at a downstream side with respect to the seat surface; and an injection-hole extending member including: a pressure receiving portion that receives pressure in a combustion chamber of an engine; and a movable portion that moves in the injection hole in an axial direction of the injection hole in response to the pressure received by the pressure receiving portion, and that changes length of the injection hole.
    Type: Application
    Filed: May 11, 2012
    Publication date: April 2, 2015
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Tatsuo Kobayashi
  • Patent number: 8978364
    Abstract: An injector for injecting a reagent into an exhaust stream includes an outer tube extending through an electromagnet and surrounding an inner tube. A first end of the inner tube is sealingly fixed to an inner surface of the outer tube. A guide member and an orifice plate are each sealingly fixed to the inner surface of the outer tube. A second end of the inner tube is aligned by the guide member. A moveable valve member includes a pintle head guided by the inner surface of the outer tube to align the valve member with an orifice extending through the orifice plate.
    Type: Grant
    Filed: May 7, 2012
    Date of Patent: March 17, 2015
    Assignee: Tenneco Automotive Operating Company Inc.
    Inventors: Keith Olivier, Thomas P. Mallin, Matthew L. Roessle, Rick Simpson
  • Publication number: 20150048185
    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 hollow valve needle axially movable in the cavity between open and closed positions to control fluid flow through the fluid outlet portion, wherein fluid can flow from the fluid inlet portion into the hollow valve needle; and an actuator assembly that actuates the valve needle and includes an axially movable armature. The valve needle includes first orifice(s) between the armature and the fluid outlet portion and second orifice(s) located adjacent or upstream of the armature. The first and second orifices allow fluid flow between the hollow valve needle and the cavity. A first gap defined between the valve needle and the armature allows fluid flow from the hollow valve needle via the second orifice into the first gap and further into the cavity.
    Type: Application
    Filed: June 2, 2014
    Publication date: February 19, 2015
    Inventors: Luigi Gargiulo, Marco Mechi, Nicola Iannaccone
  • Patent number: 8955766
    Abstract: A heatable injector for fuel injection in an internal combustion engine, the injector having an injector housing, a fuel space which is situated inside the injector housing, an adjustable injector needle which is arranged in the injector housing for opening and closing a fuel discharge opening of the injector housing, and a heating device which is arranged inside the injector housing with a heating element for heating the fuel which is situated in the fuel space. The heating element is configured as a coating of a boundary face of the injector with respect to its fuel space, the coating being composed of a carbon nanoparticle material.
    Type: Grant
    Filed: February 28, 2014
    Date of Patent: February 17, 2015
    Assignee: Dr. Ing. h.c. F. Porsche Aktiengesellschaft
    Inventors: Marko Hertwig, Andreas Nauwerck, Matteo Skull
  • Publication number: 20150040869
    Abstract: A fluid injector includes a valve body, a valve needle and axially moveable in the valve body between a closing position that prevents a fluid injection and further positions that permit the fluid injection, an armature coupled to the valve needle for displacing the valve needle away from the closing position, and a solenoid assembly including at least a first and second coil and operable to magnetically actuate the armature via an electrical signal. A method for operating the fluid injector includes applying the electrical signal to the first coil to generate a magnetic field to move the armature for displacing the valve needle away from the closing position, evaluating a voltage across terminals of the first coil, and controlling the second coil with a further electrical signal to saturate a magnetic field in a portion of the valve body between the armature and solenoid assembly during evaluating the voltage.
    Type: Application
    Filed: June 2, 2014
    Publication date: February 12, 2015
    Inventors: Stefano Filippi, Mauro Grandi, Francesco Lenzi, Valerio Polidori
  • Publication number: 20150041569
    Abstract: A valve assembly arrangement for an injection valve may have a central longitudinal axis, a valve assembly of the inward opening type, and a valve assembly of the outward opening type, wherein the valve assembly of the outward opening type is axially arranged adjacent and fixedly coupled to the valve assembly of the inward opening type such that the valve assembly of the inward opening type is operable to inject fluid into the valve assembly of the outward opening type for increasing a fluid pressure in the valve assembly of the outward opening type to open the valve assembly of the outward opening type to enable dispensing of the fluid from the valve assembly arrangement.
    Type: Application
    Filed: December 5, 2012
    Publication date: February 12, 2015
    Inventor: Mauro Grandi
  • Publication number: 20150041568
    Abstract: An injection valve assembly includes a valve body having a cavity with a fluid inlet and a fluid outlet, a valve needle axially movable in the cavity to control fluid flow through the fluid outlet, an electro-magnetic actuator unit having an armature axially movable in the cavity and having a main body and a flange axially distanced from and fixedly coupled to the main body, and a stop element fixed to the valve needle and arranged in the cavity between the main body and the flange. An armature spring in the cavity forces the stop element into contact with an inner surface of the flange. An overlapping area of the stop element and the inner surface is bounded by an inner contour and an outer contour, and an area enclosed by the outer contour is at least three times as large as an area enclosed by the inner contour.
    Type: Application
    Filed: October 24, 2012
    Publication date: February 12, 2015
    Inventors: Ivano Izzo, Mose Gado, Matteo Soriani
  • 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: 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: 8919677
    Abstract: An injection nozzle comprising a nozzle body provided with a bore within which a valve needle is moveable, the valve needle being engageable with a valve seating to control fuel delivery through a set of nozzle outlets, said nozzle outlets including respective entry openings defined in a wall of a sac volume of the nozzle body, wherein the valve needle includes a first valve region, a second valve region and a seat region defined by a transition between the first and second valve regions which seats against the valve seating when the nozzle is in a non-injecting state. The valve needle comprises a third valve region adjacent the second valve region, the third valve region having an outer surface defining a curved profile, the end of the outer surface terminating substantially in alignment with the entry openings when the valve needle is engaged with the valve seating.
    Type: Grant
    Filed: March 15, 2011
    Date of Patent: December 30, 2014
    Assignee: Delphi International Operations Luxembourg S.A.R.L.
    Inventors: Cecilia C. E. Soteriou, Marion L. Balin
  • Patent number: 8919372
    Abstract: A valve assembly for an injection valve has a valve body with a central longitudinal axis and a cavity with a fluid inlet portion and a fluid outlet portion, a valve needle axially movable in the cavity, the needle preventing a fluid flow in a closing position and releasing the fluid flow via a main fluid line in further positions, a member being fixedly associated to the needle and having a surface facing the outlet portion, a first chamber embodied in the cavity, a second chamber being part of the main line, and a one-way-valve which is hydraulically arranged between the first and second chamber to prevent a fluid flow through a first fluid path in a closing position of the one-way-valve and to release a fluid flow through the first fluid path between the first and second chamber in further positions of the one-way-valve.
    Type: Grant
    Filed: April 14, 2010
    Date of Patent: December 30, 2014
    Assignee: Continental Automotive GmbH
    Inventors: Gianbattista Fischetti, Luigi Gargiulo, Marco Mechi, Ileana Romeo
  • Publication number: 20140361103
    Abstract: A fuel injector includes an injector body that defines a fuel inlet, a drain outlet and a nozzle outlet, and has disposed therein a nozzle chamber, a needle control chamber and a valve chamber. The needle control chamber is fluidly connected to the drain outlet through a drain passage that includes the conical seat, is fluidly connected to the nozzle chamber through a Z orifice, and fluidly connected to the valve chamber through an A orifice. The nozzle chamber is fluidly connected to the valve chamber by a pressure passage that includes an F orifice that opens through a flat seat. A control valve member is trapped to move between contact with conical seat and contact with the flat seat. An electrical actuator is operable to push the control valve member away from the conical seat toward the flat seat when energized. A direct control needle valve has an opening hydraulic surface positioned in the nozzle chamber and a closing hydraulic surface positioned in the needle control chamber.
    Type: Application
    Filed: August 27, 2014
    Publication date: December 11, 2014
    Applicant: Caterpillar Inc.
    Inventors: Hoisan Kim, Mark F. Sommars, Xiangdong Ding
  • Patent number: 8905333
    Abstract: A method and apparatus are disclosed for inducing a supercavitating flow inside a fuel injection nozzle orifice to reduce the penetration length of the fuel spray, maintain high levels of fuel atomization, and improve uniformity of the fuel spray exiting the nozzle such that high-pressure injectors can be used on small engines. This reduction in penetration length is accomplished without any reduction in upstream fuel pressure.
    Type: Grant
    Filed: May 24, 2011
    Date of Patent: December 9, 2014
    Assignee: Mainstream Engineering Corporation
    Inventors: David M. Sykes, Joseph Homitz, Gregory S. Cole
  • Publication number: 20140353409
    Abstract: Provided is a direct spray fuel injector including a bundle of opening/closing valves, wherein the bundle of opening/closing valves includes: a valve needle that is disposed within a valve housing; an electromagnetic coil that is installed at a side opposite to the spray hole of the valve needle; an armature that is coaxially mounted on an outer circumferential surface of the valve needle to be slidable in an axial direction; and a pressurizing spring that is installed to pressurize the valve needle toward the spray hole and causes the valve needle to close the spray hole in normal times, and the bundle of opening closing valves is configured to pressurize the valve needle by the armature so that bounce generated when the valve needle in an open state approaches the spray hole so as to close the spray hole is able to be attenuated.
    Type: Application
    Filed: September 6, 2012
    Publication date: December 4, 2014
    Applicant: HYUNDAI KEFICO CORPORATION
    Inventors: Hyoung Jin Kim, Kang Hun Lee
  • Patent number: 8888022
    Abstract: There is provided a coupling process whereby two components can be coupled together at high positional precision regardless of precision of a single component. A softer component 17 of two components 15, 17 to be coupled together is subjected to shearing by a corner 15c of a harder component 15 while respective parts of the two components 15, 17, positioning of the respective parts being required, are kept as-positioned state with the use of a mandrel 31, and a side face of the corner 15c is fitted to a sheared surface 17c of the softer component 17 during shearing in progress, subsequently coupling the two components 15, 17 together at a fitting surface by plastic coupling, press-fitting, or welding.
    Type: Grant
    Filed: June 13, 2012
    Date of Patent: November 18, 2014
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Kenichi Gunji, Masato Higuma
  • Patent number: 8881363
    Abstract: There is provided a coupling process whereby two components can be coupled together at high positional precision regardless of precision of a single component. A softer component 17 of two components 15, 17 to be coupled together is subjected to shearing by a corner 15c of a harder component 15 while respective parts of the two components 15, 17, positioning of the respective parts being required, are kept as-positioned state with the use of a mandrel 31, and a side face of the corner 15c is fitted to a sheared surface 17c of the softer component 17 during shearing in progress, subsequently coupling the two components 15, 17 together at a fitting surface by plastic coupling, press-fitting, or welding.
    Type: Grant
    Filed: June 24, 2009
    Date of Patent: November 11, 2014
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Kenichi Gunji, Masato Higuma
  • Patent number: 8870091
    Abstract: A method of operating a pressure compensated fuel injector includes: filling a fuel chamber with a charge of fuel by closing an injector valve and circulating a fuel from a fuel source through a plurality of recirculating valves and a cap valve; then isolating the fuel chamber and the charge of fuel from the fuel source; then equalizing a pressure within the fuel chamber to a rising pressure outside the fuel chamber by reducing a volume of the isolated fuel chamber; and then activating a solenoid that is coupled to the injector valve, opening the injector valve; and then further reducing the volume of the isolated fuel chamber to apply an over pressure within the chamber, pumping fuel from the fuel chamber through the injection orifice.
    Type: Grant
    Filed: December 1, 2011
    Date of Patent: October 28, 2014
    Assignee: McVan Aerospace
    Inventors: Ray McKaig, Brian Donovan
  • Publication number: 20140312147
    Abstract: The present invention relates to a fuel injector. The fuel injector is provided with an injection nozzle, an injection valve, and an electromagnetic actuator. The injection valve has a movable needle to adjust the flow of fuel through the injection nozzle. The electromagnetic actuator is adapted to move the needle between a closing position and an opening position of the injection valve and is provided with a movable plunger which is mechanically connected to the needle and has at least one feeding through hole for the passage of fuel towards the injection nozzle. The plunger is provided with a hydraulic type braking device, which is coupled to the feeding hole and hydraulically dissipates kinetic energy to slow down the opening stroke of the needle when the needle moves towards the opening position of the injection valve.
    Type: Application
    Filed: April 17, 2014
    Publication date: October 23, 2014
    Inventors: Stefano Petrecchia, Massimo Lolli, Massimo Mattioli, Enrico Vezzani, Daniele De Vita
  • Publication number: 20140306034
    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: Application
    Filed: April 7, 2014
    Publication date: October 16, 2014
    Applicant: ROBERT BOSCH GMBH
    Inventors: Dietmar SCHMIEDER, Tilo LANDENFELD
  • Patent number: 8857743
    Abstract: The objective of the present invention is to realize the structure, of a fuel injection valve, in which bouncing of the needle can be suppressed and the armature position can be fixed while the valve is closed, without increasing the number of components and the number of processes. In a fuel injection valve including an armature that is repelled or attracted by a core, by de-energizing or energizing a coil, a needle that opens or closes a valve seat in accordance with a reciprocal travel of the armature, and a valve-closing spring that biases the needle so as to close the valve, when the coil is de-energized, the valve-closing spring is disposed on the armature, and the needle and the armature are fixed in such a way that the armature can travel in an axis direction by a predetermined amount with respect to the needle.
    Type: Grant
    Filed: November 24, 2008
    Date of Patent: October 14, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Akio Shingu, Masayuki Aota, Tsuyoshi Munezane
  • Patent number: 8840048
    Abstract: An injection valve for injecting fluid has a housing with an injection valve cavity. The injection valve has a needle being axially moveable within the cavity. The needle has a needle body with a valve needle cavity and a separation element being fixedly arranged within the needle cavity and being adopted to divide the valve needle cavity into a first and second fluid volume. The separation element has at least one fluid passage with a predetermined passage opening to hydraulically connect the first fluid volume with the second fluid volume. The valve needle has a sealing element being arranged to predetermine the first fluid volume and preventing a fluid injection in a closing position and permitting the fluid injection in further positions. In addition, the valve needle has at least one spring element being preloaded and acting on the sealing element towards a maximum axial expansion of the valve needle.
    Type: Grant
    Filed: March 23, 2010
    Date of Patent: September 23, 2014
    Assignee: Continental Automotive GmbH
    Inventors: Antonio Agresta, Gianbattista Fischetti, Luigi Gargiulo, Marco Mechi
  • Patent number: 8833735
    Abstract: A fuel injection valve (100) for internal combustion engines, having a housing (10) in which a nozzle body (11) is at least indirectly axially clamped against a holding body (15) by means of a clamping nut (18), wherein the clamping nut (18) radially surrounds the nozzle body (11), and wherein a threaded connection (20) between the holding body (15) and the clamping nut (18) is formed between the clamping nut (18) and the holding body (15) in a region which is axially spaced apart from the nozzle body (11). The threaded connection (20) comprises at least two toothing regions (21, 22) which have different threaded dimensions and are arranged axially one behind the other in the longitudinal direction of the housing (10).
    Type: Grant
    Filed: June 6, 2012
    Date of Patent: September 16, 2014
    Assignee: Robert Bosch GmbH
    Inventor: Dietmar Uhlmann