Patents by Inventor Motoyuki Abe
Motoyuki Abe has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7775463Abstract: In an injector used for an internal combustion engine, a favorable magnetic attraction force is obtained to reduce a controllable minimum injection amount of a fuel injection amount. In a fuel injection valve in which a fixed core and a moving element is contained inside a pipe-shaped member, and a coil and a yoke are provided on an outer side thereof, a space for placing the coil is placed so that an inner circumference length in a vertical section of the space becomes smaller than an outside diameter of the yoke, or a height of the space in an axial direction of the fixed core becomes smaller than a diameter of the fixed core.Type: GrantFiled: July 12, 2007Date of Patent: August 17, 2010Assignee: Hitachi, Ltd.Inventors: Motoyuki Abe, Masahiko Hayatani, Tohru Ishikawa
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Patent number: 7774126Abstract: An electromagnetic fuel injection valve device for an internal combustion engine is configured to carry out an energization to an electromagnetic coil of an injection valve actuator for a valve opening motion and additionally carry out a mid-term energization at a time interval between both an energization for valve opening of a previous fuel injection and an energization for valve opening of a subsequent fuel injection. A current of the mid-term energization is smaller than a current of the energization for valve opening motion and has the same direction as a direction of the current of the energization for valve opening motion.Type: GrantFiled: May 8, 2008Date of Patent: August 10, 2010Assignee: Hitachi, Ltd.Inventors: Motoyuki Abe, Masahiko Hayatani, Tohru Ishikawa, Takehiko Kowatari, Noriyuki Maekawa
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Publication number: 20100147977Abstract: An electromagnetic fuel injection valve comprising: a metallic cylindrical-shaped vessel provided at a tip end thereof with a fuel injection port, the other end thereof being closed by a stationary core provided centrally thereof with a through-hole; a movable member arranged between the stationary core and the fuel injection port and provided at a tip end thereof with a valve element, which opens and closes the fuel injection port, a maximum outside diameter of the movable member being smaller than a minimum inside diameter of the through-hole; and an electromagnetic drive mechanism that reciprocates the movable member.Type: ApplicationFiled: February 17, 2010Publication date: June 17, 2010Applicant: Hitachi, Ltd.Inventors: Masahiko HAYATANI, Motoyuki Abe, Atsushi Sekine, Tohru Ishikawa
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Patent number: 7721713Abstract: An electromagnetic fuel injection valve comprising: a metallic cylindrical-shaped vessel provided at a tip end thereof with a fuel injection port, the other end thereof being closed by a stationary core provided centrally thereof with a through-hole; a movable member arranged between the stationary core and the fuel injection port and provided at a tip end thereof with a valve element, which opens and closes the fuel injection port, a maximum outside diameter of the movable member being smaller than a minimum inside diameter of the through-hole; and an electromagnetic drive mechanism that reciprocates the movable member.Type: GrantFiled: January 18, 2007Date of Patent: May 25, 2010Assignee: Hitachi, Ltd.Inventors: Masahiko Hayatani, Motoyuki Abe, Atsushi Sekine, Tohru Ishikawa
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Publication number: 20100065021Abstract: In a fuel injection valve used for an internal combustion engine, a valve closing lag time due to fluid resistance in a fuel path is shortened to decrease a minimum injection limit. More specifically, in the fuel injection valve in which an anchor is attracted to an end face part of a stationary core having a fuel path formed at a center part thereof by means of electromagnetic force, and in which a fuel injection hole is opened and closed by controlling a valve disc driven in conjunction with the anchor, there are provided a fuel reservoir part at a center part of an upper end face part of the anchor, a through hole extending axially in a fashion that an end part thereof is open to the fuel reservoir part, and a fuel path extending radially outward from the fuel reservoir part so that fuel is fed to a magnetic attraction gap between an upper end face part of the anchor and a lower end face part of the stationary core.Type: ApplicationFiled: September 25, 2006Publication date: March 18, 2010Applicant: HITACHI, LTD.Inventors: Masahiko Hayatani, Motoyuki Abe, Toru Ishikawa, Eiichi Kubota, Takehiko Kowatari
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Publication number: 20100051727Abstract: Each of the injection holes has an inclined angle with respect to a center line of an injection valve main body as well as the inclined angle of each of the injection holes is provided with a predetermined offset amount with respect to a target inclination angle of a center of gravity position of each of the injected fuel sprays. The predetermined offset amount is set based on a correction amount for correcting positional drift with respect to the target direction of the center of gravity position of the fuel spray.Type: ApplicationFiled: July 30, 2009Publication date: March 4, 2010Applicant: Hitachi Automotive Systems, Ltd.Inventors: Yusuke IRINO, Tohru ISHIKAWA, Yasuo NAMAIZAWA, Motoyuki ABE, Atsushi SEKINE
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Publication number: 20100012754Abstract: In relation to injectors used for internal-combustion engines, it is important to decrease valve closing delay time and also the minimum injection quantity, while these are affected by remanent magnetism in the fixed core, surface tension of the fuel, etc. With reference to a fuel injection valve with a pipe-shaped member to enclose a fixed core and a movable part and further with coils and yokes to cover up the above pipe-shaped member, the anchor to drive the movable member has a plurality of through holes for fuel passage extending in the axial direction, while these through holes are arranged at a certain intervals in the circumferential direction, and projections formed to constitute a contacting surface to touch the fixed core arranged randomly in between the through holes.Type: ApplicationFiled: September 25, 2006Publication date: January 21, 2010Applicant: Hitachi, Ltd.Inventors: Masahiko Hayatani, Motoyuki Abe, Toru Ishikawa, Eiichi Kubota, Takehiko Kowatari
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Patent number: 7607418Abstract: A fuel injection nozzle for directly injecting fuel into a cylinder of an internal combustion engine is inserted in a connecting pipe extending from a fuel rail and is fixed to the connecting pipe by fastening member. The fuel injection nozzle has a sealing part for sealing a fuel passage to prevent fuel leakage, and a contact part in contact with the fastening member. The contact part is softer than the fastening member, and the contact part undergoes plastic deformation when a bending moment that bends the axis of the fuel injection nozzle acts on the fuel injection nozzle.Type: GrantFiled: August 18, 2008Date of Patent: October 27, 2009Assignee: Hitachi, Ltd.Inventors: Motoyuki Abe, Masahiko Hayatani, Tohru Ishikawa, Takehiko Kowatari, Noriyuki Maekawa, Yasuo Namaizawa, Yusuke Irino
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Publication number: 20090188996Abstract: An injector used for an internal combustion engine includes a valve needle which closes a fuel passage by contacting a valve seat and opens the fuel passage by separating from the valve seat. A coil and a magnetic core are provided to drive the valve needle, and an anchor is held in a relatively displaceable state with respect to the valve needle. A first biasing device biases the valve needle in a direction opposite to a direction of a drive force, and a second biasing device biases the anchor in the direction of the drive force with a set load smaller than that of the first biasing device. A restricting feature restricts relative displacement of the anchor with respect to the valve needle in the direction of the drive force.Type: ApplicationFiled: April 9, 2009Publication date: July 30, 2009Applicant: HITACHI, LTD.Inventors: Motoyuki ABE, Masahiko Hayatani, Atsushi Sekine, Yasuo Namaizawa, Tohru Ishikawa, Noriyuki Maekawa
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Publication number: 20090188990Abstract: The present invention provides a simplified fuel injector which uses fuel as hydraulic oil to intensify the injection pressure. A pressure intensifier of the fuel injector is provided with a pressurization piston 106, a first fuel chamber 107 that communicates with a fuel inlet passage 101 (or a fuel supply passage), and a fuel pressurization chamber 111. The pressurization chamber 111 is provided inside a valve body 110. The pressurization piston 106 is formed displaceably relative to the valve body 110 and is provided with a first pressure receiving surface 106a and a pressurization piston portion 106b. The first pressure receiving surface 106a is one end surface of the pressurization piston 106 which faces one of the piston displacement directions 106d, that is, faces the first fuel chamber 107.Type: ApplicationFiled: January 27, 2009Publication date: July 30, 2009Applicant: Hitachi Ltd.Inventors: Motoyuki ABE, Akiko Komeda, Tohru Ishikawa, Takehiko Kowatari, Noriyuki Maekawa
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Publication number: 20090064972Abstract: A fuel injection nozzle for directly injecting fuel into a cylinder of an internal combustion engine is inserted in a connecting pipe extending from a fuel rail and is fixed to the connecting pipe by fastening member. The fuel injection nozzle has a sealing part for sealing a fuel passage to prevent fuel leakage, and a contact part in contact with the fastening member. The contact part is softer than the fastening member, and the contact part undergoes plastic deformation when a bending moment that bends the axis of the fuel injection nozzle acts on the fuel injection nozzle.Type: ApplicationFiled: August 18, 2008Publication date: March 12, 2009Applicant: Hitachi, Ltd.Inventors: Motoyuki ABE, Masahiko Hayatani, Tohru Ishikawa, Takehiko Kowatari, Noriyuki Maekawa, Yasuo Namaizawa, Yusuke Irino
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Patent number: 7472839Abstract: A heating time period is decreased by that a valve body including a hollow valve shaft is arranged in a slidable manner in a cylindrical part of a casing on which a nozzle body with a valve seat is mounted at a front end thereof, a fuel is introduced from a fuel outlet port opening on a shaft wall of the valve shaft into a fuel path formed by the valve shaft and the cylindrical part, the fuel is heated to be injected from the nozzle body by a heater arranged at an outside of the fuel path of the cylindrical part, and a sleeve is mounted in the fuel path so that a large diameter part thereof closes the fuel path at an upper area of the fuel outlet port, while a fuel inlet port is formed on a small diameter part of the sleeve to introduce the fuel into the fuel path, so that the fuel path is narrowed to decrease an amount of the fuel to be heated by the heater.Type: GrantFiled: October 5, 2006Date of Patent: January 6, 2009Assignee: Hitachi, Ltd.Inventors: Yoshihito Yasukawa, Noriyuki Maekawa, Motoyuki Abe, Nobuaki Sekiya, Masahiro Soma
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Publication number: 20080276907Abstract: An electromagnetic fuel injection valve device for an internal combustion engine is configured to carry out an energization to an electromagnetic coil of an injection valve actuator for a valve opening motion and additionally carry out a mid-term energization at a time interval between both an energization for valve opening of a previous fuel injection and an energization for valve opening of a subsequent fuel injection. A current of the mid-term energization is smaller than a current of the energization for valve opening motion and has the same direction as a direction of the current of the energization for valve opening motion.Type: ApplicationFiled: May 8, 2008Publication date: November 13, 2008Applicant: Hitachi, Ltd.Inventors: Motoyuki Abe, Masahiko Hayatani, Tohru Ishikawa, Takehiko Kowatari, Noriyuki Maekawa
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Publication number: 20080116301Abstract: A fuel injection valve comprises a valve seat, a movable valve element which is seated on or separated from the valve seat, and a nozzle member having a plurality of nozzle holes. At least one of the valve element and valve seat has a curved surface at a contact position where they contact with each other when the valve element is seated on the valve seat. Two or more of the nozzle holes are provided outside an intersection line of a virtual extension surface along a tangential line to the curved surface at the contact position and a surface of the nozzle member.Type: ApplicationFiled: October 16, 2007Publication date: May 22, 2008Applicant: Hitachi, Ltd.Inventors: Yoshihito Yasukawa, Eiji Ishii, Noriyuki Maekawa, Motoyuki Abe, Hiroshi Yamada, Nobuaki Kobayashi, Takahiro Saito
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Patent number: 7357123Abstract: Information storage element 102 and transmitter-receiver 103 are molded in resin connector part 101 of fuel injection valve 100 which projects outside of the engine by molding. The precise control of an injection amount is enabled by using directly the characteristic of injection amount stored in information storage element 102, and obtaining the width of the injection command pulse corresponding to the injection amount instruction value. Thereby, the minimum injection amount which is the minimum value of the fuel supply amount which can be controlled is reduced.Type: GrantFiled: November 29, 2005Date of Patent: April 15, 2008Assignee: Hitachi, Ltd.Inventors: Noriyuki Maekawa, Motoyuki Abe, Kenchiro Tokuo, Takehiko Kowatari, Tohru Ishikawa, Toshiyuki Innami, Kazuhiko Hanawa, Satoshi Shimada
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Publication number: 20080011886Abstract: In an injector used for an internal combustion engine, a favorable magnetic attraction force is obtained to reduce a controllable minimum injection amount of a fuel injection amount. In a fuel injection valve in which a fixed core and a moving element is contained inside a pipe-shaped member, and a coil and a yoke are provided on an outer side thereof, a space for placing the coil is placed so that an inner circumference length in a vertical section of the space becomes smaller than an outside diameter of the yoke, or a height of the space in an axial direction of the fixed core becomes smaller than a diameter of the fixed core.Type: ApplicationFiled: July 12, 2007Publication date: January 17, 2008Applicant: Hitachi, Ltd.Inventors: Motoyuki ABE, Masahiko Hayatani, Tohru Ishikawa
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Patent number: 7264181Abstract: Using a swirl type fuel injection valve, a concentrated spray area and a thin spray area are formed, the positions thereof are adjusted, and the spray is made to conform to the geometric shape of the engine and mounting position of the fuel injection valve, so as to reduce the fuel consumption and control the unburnt components in exhaust gas. The fuel injection valve is so constructed that a step is formed on the injection hole opening of the fuel injection valve, so as to provide two or more edge transition portions at the injection hole opening, resulting from the step, and the line connecting the edge transition portions forms an oblique angle relative to the wall formed by the step perpendicular to the injection hole center axis and the angled wall.Type: GrantFiled: December 28, 2004Date of Patent: September 4, 2007Assignee: Hitachi, Ltd.Inventors: Motoyuki Abe, Yoshio Okamoto, Yuzo Kadomukai, Makoto Yamakado, Ayumu Miyajima, Hiromasa Kubo, Toru Ishikawa, Yasuo Namaizawa
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Publication number: 20070194152Abstract: An injector used for an internal combustion engine includes a valve needle which closes a fuel passage by being contacted on a valve seat and opens the fuel passage by separating from the valve seat, a coil and a magnetic core which are provided as a drive means of the valve needle, an anchor held in a relatively displaceable state with respect to the valve needle, a first biasing means biasing the valve needle in a direction opposite to a direction of a drive force, a second biasing means biasing the anchor in the direction of the drive force with a set load smaller than that of the first biasing means, and a restricting means restricting relative displacement of the anchor with respect to the valve needle in the direction of the drive force.Type: ApplicationFiled: January 18, 2007Publication date: August 23, 2007Applicant: Hitachi. Ltd.Inventors: Motoyuki Abe, Masahiko Hayatani, Atsushi Sekine, Yasuo Namaizawa, Tohru Ishikawa, Noriyuki Maekawa
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Publication number: 20070194151Abstract: An electromagnetic fuel injection valve comprising: a metallic cylindrical-shaped vessel provided at a tip end thereof with a fuel injection port, the other end thereof being closed by a stationary core provided centrally thereof with a through-hole; a movable member arranged between the stationary core and the fuel injection port and provided at a tip end thereof with a valve element, which opens and closes the fuel injection port, a maximum outside diameter of the movable member being smaller than a minimum inside diameter of the through-hole; and an electromagnetic drive mechanism that reciprocates the movable member.Type: ApplicationFiled: January 18, 2007Publication date: August 23, 2007Applicant: Hitachi, Ltd.Inventors: Masahiko Hayatani, Motoyuki Abe, Atsushi Sekine, Tohru Ishikawa
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Publication number: 20070080239Abstract: A heating time period is decreased by that a valve body including a hollow valve shaft is arranged in a slidable manner in a cylindrical part of a casing on which a nozzle body with a valve seat is mounted at a front end thereof, a fuel is introduced from a fuel outlet port opening on a shaft wall of the valve shaft into a fuel path formed by the valve shaft and the cylindrical part, the fuel is heated to be injected from the nozzle body by a heater arranged at an outside of the fuel path of the cylindrical part, and a sleeve is mounted in the fuel path so that a large diameter part thereof closes the fuel path at an upper area of the fuel outlet port, while a fuel inlet port is formed on a small diameter part of the sleeve to introduce the fuel into the fuel path, so that the fuel path is narrowed to decrease an amount of the fuel to be heated by the heater.Type: ApplicationFiled: October 5, 2006Publication date: April 12, 2007Applicant: Hitachi, LTD.Inventors: Yoshihito Yasukawa, Noriyuki Maekawa, Motoyuki Abe, Nobuaki Sekiya, Masahiro Soma