Coil Surrounds Valve Port Or Flow Line Patents (Class 251/129.21)
  • Patent number: 6336621
    Abstract: A fuel injection port 21 formed in a seat 20 is opened and closed by a movable valve 14 supported by a flat spring 16. The movable valve 14 is biased by an elastic force of a coil spring 26 in a direction that closes the fuel injection port 21. When electric power is supplied to a solenoid coil 4, the movable valve 14 is moved to a direction that opens the fuel injection port 21 as a result of an electromagnetic attraction force between a magnetic circuit M for generating an electromagnetic attraction force and the movable valve 14. Air gaps G0, G1 and G2 are formed within the fuel injection port and permeance ratios between the air gaps may be set to optimal values.
    Type: Grant
    Filed: February 22, 2000
    Date of Patent: January 8, 2002
    Assignee: Aisan Kogyo Kabushiki Kaisha
    Inventors: Seiji Ii, Hideki Ito, Hiroshi Kawazoe, Toshiro Makimura
  • Patent number: 6317978
    Abstract: An electromagnetically actuated valve is provided having that an axially movable valve needle, which is formed by an armature, a valve closing body and a connection piece connecting the two. The tubular connection piece has two elongated slots, which do not extend over the entire length of the connection piece, but at least over 75% of its length. Thus there are two spring-elastic half-shells in the slotted area. The valve closing body is attached at the unslotted end of the connection piece. The valve is particularly well suited for use in fuel injection systems of compressed-mixture, externally ignited internal combustion engines.
    Type: Grant
    Filed: March 12, 1999
    Date of Patent: November 20, 2001
    Assignee: Robert Bosch GmbH
    Inventor: Ferdinand Reiter
  • Publication number: 20010040194
    Abstract: In a fuel injection valve, a cylindrical valve body has a valve seat protruding radially inward out of an inner wall thereof and a needle supporting cylindrical inner wall. A nozzle needle is fixed to the armature so as to move together with the armature, while being supported slidably by the needle supporting cylindrical inner wall. The nozzle needle is provided with a valve portion to be seated on the valve seat when a coil is de-energized and inside thereof with a cavity into which fuel is introduced. A fuel accumulation bore is provided between inner circumference of the cylindrical valve body and outer circumference of the nozzle needle. With the construction mentioned above, the nozzle needle is provided with an opening through which the cavity communicates with the fuel accumulation bore.
    Type: Application
    Filed: May 11, 2001
    Publication date: November 15, 2001
    Inventors: Yukio Yamaguchi, Takayuki Hokao
  • Patent number: 6311951
    Abstract: The invention concerns a solenoid valve for the opening and shutting of a channel (16) for a medium, featuring an electromagnet (11) with a soft iron magnetic core (12) and a coil (13) and an armature actuated by them. According to the invention, it is provided that the channel passes through the ferrite core with its feed opening ending at the front side of the ferrite core, that the armature is configured as a sheet metal armature (14) that, on the side of the exit of the channel, is elastically held against the magnetic force and that features a seal (21), on its side facing the channel, which shuts the channel when the sheet metal armature is pulled down.
    Type: Grant
    Filed: October 8, 1999
    Date of Patent: November 6, 2001
    Assignee: I.E.M. Industrielle Entwicklung Medizintechnik und Vertriebsgesellschaft mbH
    Inventor: Helmut Samulowitz
  • Patent number: 6302371
    Abstract: An electromagnetically actuatable valve includes a core and an armature, each having a respective end face. The end faces are aligned and opposing. One of the end faces has a spherically-curved contour, and the other of the end faces defines a conical surface with respect to a longitudinal axis of the valve. At least one of the end faces may include a wear-resistant coating. At least one of the end faces may be surface-hardened.
    Type: Grant
    Filed: May 30, 2000
    Date of Patent: October 16, 2001
    Assignee: Robert Bosch GmbH
    Inventor: Ferdinand Reiter
  • Patent number: 6286770
    Abstract: Fuel injector, comprising a main tubular body, provided with at least one through pipe which ends in a spray nozzle which can spray the fuel present inside the through pipe, and a shutter unit, which is mobile axially inside the through pipe, from and towards a position of closure, in which the shutter unit itself abuts a sealing surface provided on the spray nozzle, and seals it in a fluid-tight manner; the shutter unit being made of a cup-type body, the base of which is defined by a sealing disc made of flexible material, on which there are provided an annular sealing projection and an annular stop projection, which is co-axial relative to the former; the annular stop projection having a height which is lower than the annular sealing projection, such as to abut the sealing surface of the spray nozzle only temporarily, subject to resilient deformation of the sealing disc itself.
    Type: Grant
    Filed: September 26, 2000
    Date of Patent: September 11, 2001
    Assignee: Magneti Marelli S.p.A.
    Inventors: Maurizio Boaro, Marcello Cristiani, Massimo Neretti
  • Publication number: 20010017326
    Abstract: An electromagnetically operable fuel injector for a fuel injection system of an internal combustion engine is disclosed having a ferromagnetic core, a magnetic coil at least partially surrounding the ferromagnetic core and an armature magnetically coupled to the magnetic coil and being movably responsive to the magnetic coil. The armature actuates a valve-closing element, which interacts with a fixed valve seat and is movable away from the fixed valve seat of a fuel valve when the magnetic coil is excited. The armature has a generally elongated shape and a generally central opening for reception of fuel from a fuel inlet connector positioned adjacent thereto. The fuel inlet connector extends in a generally longitudinal direction above the armature and defines a central path for fuel to enter the inlet connector and to be directed toward the armature for further passage toward the fixed valve seat.
    Type: Application
    Filed: May 26, 1999
    Publication date: August 30, 2001
    Inventors: JAMES PAUL FOCHTMAN, DANNY ORLEN WRIGHT
  • Publication number: 20010017327
    Abstract: An electromagnetically operable fuel injector for a gaseous fuel injection system of an internal combustion engine, the injector having a generally longitudinal axis, which comprises, a ferromagnetic core, a magnetic coil at least partially surrounding the ferromagnetic core and an armature magnetically coupled to the magnetic coil and being movably responsive to the magnetic coil. The armature actuates a valve closing element which interacts with a fixed valve seat of a fuel valve and is movable away from the fixed valve seat when the magnetic coil is excited. The fixed valve seat defines a central fuel opening and a generally annular groove adjacent the central fuel opening, the armature having a generally elongated shape and a generally central opening for axial reception and passage of gaseous fuel from a fuel inlet connector positioned adjacent thereto.
    Type: Application
    Filed: August 10, 1999
    Publication date: August 30, 2001
    Inventor: JAMES PAUL FOCHTMAN
  • Patent number: 6279841
    Abstract: In a fuel injector a valve-closure member movable axially along a valve longitudinal axis and a valve-seat body are provided for opening and closing the valve. Allocated to the valve-seat body is a valve-seat face which cooperates with the valve-closure member. In this context, the valve-closure member is joined to the valve-seat body via a spring element designed in the form of a diaphragm spring. The spring element is arranged in such a manner that it pulls the valve-closure member toward the valve-seat face as a return spring in response to closing of the valve. The fuel injector is particularly suitable for use in fuel-injection systems of mixture-compressing internal combustion engines with externally supplied ignition.
    Type: Grant
    Filed: April 5, 2000
    Date of Patent: August 28, 2001
    Assignee: Robert Bosch GmbH
    Inventor: Michael McCormick
  • Patent number: 6279873
    Abstract: A fuel injection valve for a fuel injection system of an internal combustion engine, in particular for injecting fuel directly into the combustion chamber of the internal combustion engine. The fuel injection valve has a magnet coil, an armature that can be pulled by the magnet coil in a direction of lift against a first return spring, and a valve needle. The valve needle has a first stop surface for the armature, which can be moved relative to the valve needle. The armature is acted upon by a second return spring. In addition, a stationary second stop surface for the armature is provided. The second return spring acts upon the armature in a direction opposite to the lift and in an inoperative position, when the magnet coil is not energized, and holds the armature in contact with the second stop surface so that a distance between the armature and the first stop surface provided on the valve needle is predefined.
    Type: Grant
    Filed: December 9, 1999
    Date of Patent: August 28, 2001
    Assignee: Robert Bosch GmbH
    Inventors: Andreas Eichendorf, Thomas Sebastian, Guido Pilgram, Rainer Norgauer
  • Publication number: 20010015418
    Abstract: The electromagnetically actuated valve is distinguished by the fact that an axially movable valve needle (6) is provided, which is formed by an armature (12), a valve closing body (13) and a connection piece (14) connecting the two. The tubular connection piece (14) has two elongated slots (50), which do not extend over the entire length of the connection piece (14), but at least over 75% of its length. Thus there are two spring-elastic half-shells in the slotted area. The valve closing body (13) is attached at the unslotted end of the connection piece (14).
    Type: Application
    Filed: March 12, 1999
    Publication date: August 23, 2001
    Inventor: FERDINAND REITER
  • Patent number: 6273395
    Abstract: A valve assembly 10 for use in a compressor. Valve assembly 10 includes a generally cylindrical stator member or assembly 12 and an inner valve or member 14 which is slidably engaged within stator assembly 12. Stator assembly 12 includes a conventional electrically operated coil 20 which is coupled to a conventional controller 98. Controller 98 selectively connects and disconnects coil 20 to and from a conventional battery 96, thereby allowing coil 20 to selectively receive electrical power. When coil 20 receives electrical power, a movable member 68 within member 14 is actuated, thereby creating a communication passage between a relatively high pressure chamber 84 and a relatively low pressure chamber 88.
    Type: Grant
    Filed: October 12, 1999
    Date of Patent: August 14, 2001
    Assignee: Ford Global Tech.
    Inventors: Rodolfo Palma, Atul Natverial Sheth, Andre D. Jess
  • Patent number: 6273396
    Abstract: The electromagnetic valve has a valve body capable to open and close a fluid communication path, first and second springs opposing to each other and biasing the valve body. Biasing forces of the first and second spring toward the valve body are balanced with each other so as to have valve body open the communication path. When a coil is energized, a moving member is driven so as to have the valve body move against the biasing force of the first spring during a first moving stroke so that an elastic energy may be stored in the first spring. When the coil is de-energized, the valve body is moved back by the first spring not only during the first moving stroke but also during a second moving stroke to absorb the elastic energy stored in the first spring by the second spring. There is an enough space where the moving member may move back during the second moving stroke so as not to hit any part.
    Type: Grant
    Filed: February 17, 2000
    Date of Patent: August 14, 2001
    Assignee: Denso Corporation
    Inventor: Yasuo Kato
  • Patent number: 6257509
    Abstract: A fuel injector for fuel injection systems of internal combustion engines, which is composed of two preassembled, independent subassemblies. In this context, a functional part essentially includes an electromagnetic circuit and a sealing valve, whereas a connecting part is essentially constituted of a hydraulic connection. In the ready-assembled injector, electrical connecting elements and hydraulic connecting elements of both subassemblies cooperate so that a reliable electrical and hydraulic connection is ensured. The valve is executed as a side-feed injector, and the electrical connection is located farther away from functional part than the hydraulic connection of the connecting part. The fuel injector is particularly suitable for use in fuel injection systems of mixture-compressing, positive ignition internal combustion engines.
    Type: Grant
    Filed: May 15, 2000
    Date of Patent: July 10, 2001
    Assignee: Robert Bosch GmbH
    Inventors: Udo Hafner, Klaus Noller, Heinz Fuchs, Albert Staacke
  • Patent number: 6257508
    Abstract: The present invention provides a valve assembly including a housing, an armature, an armature bias spring, a needle, and a seat. The valve assembly housing has an inlet, an outlet, and an axially extending passageway from the inlet to the outlet along a longitudinal axis. The armature is disposed within the passageway. The armature has an armature passage including a first portion and a second portion. The first portion has a first cross-sectional area. The second portion has a second cross-sectional area. The first cross-sectional area of the first portion is greater than the second cross-sectional area of the second portion. The armature bias spring is disposed within the first portion of the armature passage. The needle is disposed within the second portion of the armature passage. The seat is located proximate the outlet. The flow restrictor is disposed between the first portion and the second portion of the armature passage of the armature.
    Type: Grant
    Filed: January 13, 2000
    Date of Patent: July 10, 2001
    Assignee: Siemens Automotive Corporation
    Inventors: David P. Wieczorek, James Paul Fochtman
  • Patent number: 6253789
    Abstract: A valve for metered introduction of fuel, volatilized from a fuel tank of an internal combustion engine, into the engine, having a valve housing which has an inflow neck for connection to a fuel tank or to an adsorption filter downstream of the tank for the volatilized fuel, and having an outflow neck for connection to the engine, having a valve member accommodated between the inflow neck and the outflow neck in the interior of the valve housing, which valve member is actuatable by an electromagnet that has a magnet core, and which cooperates with a valve seat embodied on a valve seat body, is characterized in that the valve housing includes a first housing part, closed on the inflow side by a protective screen, in/on which the electromagnet, the valve member, the valve seat body and the outflow neck are provided, and a second housing part, on which the inflow neck is disposed and which can be secured to the first housing part.
    Type: Grant
    Filed: June 5, 2000
    Date of Patent: July 3, 2001
    Assignee: Robert Bosch GmbH
    Inventors: Erwin Krimmer, Wolfgang Schulz, Tilman Miehle, Manfred Zimmermann, Maria Esperilla
  • Patent number: 6220275
    Abstract: The solenoid valve (10) has an armature chamber (38) communicated with the outlets (86) of the valve to receive feed of fluid. The fluid in the chamber (38) is drained through drain passages (96) which are arranged to open into the chamber (38) at a location radially outwardly offset from the axis of the valve. The flow of fluid flowing into the chamber (38) is directly transferred to the drain passages (96) to thereby wash ferrous particles away from the magnetic gap to self-clean the gap each time the valve is opened. A spacer (62) made of a non-magnetizable material covers the upper end face of the armature (36) to prevent accumulation of ferrous particles.
    Type: Grant
    Filed: May 25, 1999
    Date of Patent: April 24, 2001
    Assignee: NOK Corporation
    Inventors: Hiroyuki Nishinosono, Norio Uemura, Nobuyuki Oka
  • Patent number: 6213413
    Abstract: A fuel injection valve is provided with an injection nozzle having an injection hole for fuel injection, a valve body for closing the injection hole, and an elastic body provided on one of a wall surface of the injection nozzle and a wall surface of the valve body. The elastic body is provided such that when the valve body closes the injection hole, the wall surface of the valve body comes into abutment with the wall surface of the injection nozzle after the valve body has come into abutment with the injection nozzle through the elastic body.
    Type: Grant
    Filed: July 30, 1999
    Date of Patent: April 10, 2001
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Susumu Kojima, Keiso Takeda
  • Patent number: 6199776
    Abstract: A fuel injection valve that possesses an axially movable valve needle which includes at least one armature and one spherical valve closure element. The armature forms a closure element support which is joined at its downstream end to the valve closure element. The end of the closure element support facing toward the valve closure element is deformed in such a way that a polygonal profile is present. In accordance with the number of profile edges, at least two flowthrough openings, communicating with an inner longitudinal bore, are formed between the closure element support and the surface of the valve closure element, through which openings fuel can easily flow.
    Type: Grant
    Filed: December 14, 1999
    Date of Patent: March 13, 2001
    Assignee: Robert Bosch GmbH
    Inventor: Martin Andorfer
  • Patent number: 6186472
    Abstract: A fuel injection valve has a metal base body extending over its entire axial length, which includes a core/internal pole and a valve jacket. The internal pole is produced by extrusion and includes a valve inlet connection, the actual core of the electromagnetic circuit, a magnetic choke point and an area for guiding an armature. However, the valve jacket is produced by deep drawing. In addition to its function as a housing part, the valve jacket also serves as a valve seat carrier. A clearance is formed between the valve jacket and the internal pole, holding a magnet coil which is sealed by a ring gasket and is therefore dry. This fuel injection valve is suitable in particular for use in fuel injection systems of internal combustion engines with spark ignition and gas mixture compression.
    Type: Grant
    Filed: August 13, 1999
    Date of Patent: February 13, 2001
    Assignee: Robert Bosch GmbH
    Inventor: Ferdinand Reiter
  • Patent number: 6186419
    Abstract: A fuel injection nozzle or fuel injector valve has a nozzle body, extending along a longitudinal axis, on which is configured a valve seat surface which coacts with a valve closure surface configured on a valve closure element to form a valve seat. At least one fuel stream, which has a radial directional component with respect to the longitudinal axis of the nozzle body, is sprayed out when the fuel injection valve or fuel injector nozzle is in an open state. A sleeve body axially overlaps the fuel stream in the direction of the longitudinal axis. The sleeve body has at least one impact surface which the fuel stream strikes. The impact surface is inclined at a predefined angle with respect to a vertical plane which runs vertically with respect to the longitudinal axis, and/or the impact surface is structured in fluted fashion on its surface.
    Type: Grant
    Filed: February 24, 1999
    Date of Patent: February 13, 2001
    Assignee: Robert Bosch GmbH
    Inventors: Stefan Kampmann, Bernd Dittus
  • Patent number: 6182457
    Abstract: An electronic variable orifice tube suitable for use as an expansion valve in a refrigeration system providing two flow rates in response to electronic control signals comprises a bodytube, a restrictor mounted within the bodytube and defining a first flowpath. A plunger is translatably positioned within the bodytube in proximity to the restrictor and defines a second and a third flowpath. A valve actuator is functionally coupled to the plunger to translate the plunger within the bodytube to transition between the two flow rates. A high flowpath is formed through the bodytube by the first, second, and third flowpaths, and a low flowpath is formed through the bodytube by the first and the second flowpaths to the exclusion of the third flowpath. A solenoid may be used as the valve actuator and a spring may be employed to return the plunger to its quiescent state when the solenoid is not energized.
    Type: Grant
    Filed: June 2, 1999
    Date of Patent: February 6, 2001
    Assignee: Ranco Incorporated of Delaware
    Inventor: Brian Enderle
  • Patent number: 6182912
    Abstract: A fuel injection valve, in particular a high-pressure injection valve for the direct injection of fuel into the combustion chamber of a compressed mixture, externally ignited internal combustion engine, has in a guide and seat area provided at the downstream end of the valve which area is formed by three disk-shaped elements. A swirl element is nested between a guide element and a valve seat element. The guide element, which can move radially in the assembled valve and which has an inner guide opening, serves to guide an axially movable valve needle which extends through it, while a valve closing section of the valve needle acts in concert with a valve seat surface of the valve seat element. The guide element is spring-loaded through a compression spring which acts upon it.
    Type: Grant
    Filed: August 27, 1999
    Date of Patent: February 6, 2001
    Assignee: Robert Bosch GmbH
    Inventors: Martin Müller, Stefan Herold, Jochen Riefenstahl, Reinhold Brückner, Dirk Fischbach, Andreas Eichendorf, Martin Bühner, Rainer Norgauer, Jürgen Virnekäs, Peter Schramm, Hans Weidler, Christian Preussner, Thomas Keil, Oliver Kirsten, Ottmar Martin, Wolfgang Leuschner
  • Patent number: 6167869
    Abstract: A fuel injector includes first and second valves and a solenoid including a solenoid coil and an armature assembly wherein the first and second valves are coupled to the armature assembly. A solenoid drive circuit is coupled to the solenoid coil and delivers a first current waveform portion to the solenoid coil at a first time to cause the armature assembly to operate the first valve without operating the second valve. A second current waveform portion different than the first current waveform portion is applied to the solenoid coil at a second time later than the first time to operate the second valve.
    Type: Grant
    Filed: November 3, 1997
    Date of Patent: January 2, 2001
    Assignee: Caterpillar Inc.
    Inventors: David E. Martin, Glen F. Forck, Dana R. Coldren, Marvin P. Schneider, Prabhakar Ramalingam
  • Patent number: 6168135
    Abstract: A solenoid actuated fuel injector includes a coil housing surrounding a solenoid coil and forming a part of a magnetic circuit which opens an injection valve when the coil is energized. To accelerate closing of the valve upon deenergizing the solenoid coil, the coil housing has narrow slots extending in the direction of the magnetic field to reduce the development and flow of eddy currents in the coil housing which retard collapse of the magnetic field and closing of the valve. The slots extend perpendicular to the direction of eddy current flow and thus increase the electrical resistance to current flow through the coil housing in this direction. They also reduce the amount of magnetic material in the coil housing and so reduce the amount of eddy currents created during field collapse.
    Type: Grant
    Filed: May 15, 1998
    Date of Patent: January 2, 2001
    Assignee: Siemens Automotive Corporation
    Inventor: James Paul Fochtman