Patents by Inventor Masaki Nagaoka

Masaki Nagaoka 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).

  • Publication number: 20210148317
    Abstract: Disclosed is a fuel injection valve in which a movable core and a fixed core are enclosed in a cylindrical body. The cylindrical body has an annular groove formed therein, on an outer circumferential side of a region in which the movable core and the fixed core are opposed to each other, to define a thin portion of small wall thickness. In a cross section taken along a center axis of the fuel injection valve, the thin portion has curved line sections on both end sides thereof in a direction along the center axis such that the curved line sections respectively connect a bottom of the annular groove to side edges of the annular groove by curved lines. The curved line sections are provided over a range of larger dimension, from the respective side edges in the direction along the center axis, than a depth dimension of the annular groove.
    Type: Application
    Filed: March 26, 2018
    Publication date: May 20, 2021
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Shigeo KUBA, Akihiro YAMAZAKI, Takahiro SAITO, Masaki NAGAOKA
  • Publication number: 20210148316
    Abstract: This fuel injection valve is provided with: a valve seat (15b) and a valve body (27c), which cooperate to open and close a fuel passage; a valve seat member (15) having formed thereon the valve seat (15b) and a guide surface (15c) which guides the valve body (27c); and a cylindrical body (5) having the valve seat member (15) press-fitted in the front end-side end thereof. The valve seat member (15) is configured so that the press-fit section (15f) thereof which is press-fitted in the cylindrical body (5) is provided at a position offset toward the base end of the cylindrical body (5) relative to both the valve seat (15b) and the guide surface (15c) in the direction of the center axis (1x) of the fuel injection valve.
    Type: Application
    Filed: March 26, 2018
    Publication date: May 20, 2021
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Atsushi NAKAI, Masaki NAGAOKA, Shigeo KUBA
  • Publication number: 20200400112
    Abstract: An object of the present invention is to provide a fuel injection valve that realizes atomization while suppressing spread of a spray. A fuel injection valve includes: a valve body and a valve seat that cooperate to open and close a fuel passage; a swirl imparting chamber that is arranged on a downstream side of an opening and closing portion of the fuel passage by the valve body and the valve seat, and imparts a swirling velocity to fuel; a communication passage arranged on an upstream side of the swirl imparting chamber and connected to the swirl imparting chamber; and fuel injection holes and that are open at a bottom surface of the swirl imparting chamber and injects fuel imparted with the swirling velocity in a swirl passage to an outside, the fuel injection holes and configured such that cross-sectional areas of the fuel injection holes and increase from the inlet to the outlet.
    Type: Application
    Filed: September 25, 2018
    Publication date: December 24, 2020
    Inventors: Hiroshi MUKAI, Mitsuhiro MATSUZAWA, Akihiro YAMAZAKI, Masaki NAGAOKA, Takahiro SAITO, Eiji ISHII, Taisuke SUGII, Kazuki YOSHIMURA
  • Patent number: 10662914
    Abstract: Disclosed is a fuel injection valve comprising: a fuel injection orifice provided in a downstream side of a valve seat which a valve body moves toward and away from; a swirl chamber having a swirl passage formed around the entry opening of the fuel injection orifice; and a transverse passage whose end is opened in an inner circumferential wall of the swirl chamber in order to provide a fuel into the swirl chamber, wherein a center of the entry opening is shifted from a first position where the velocity component in the swirl direction of the fuel can be maximized to a second position where the velocity component in the swirl direction is reduced, and where a velocity component in a center axis direction of the fuel injection orifice is enhanced. Thereby, it is possible to easily adjust a fuel injection amount and a spray angle.
    Type: Grant
    Filed: February 5, 2016
    Date of Patent: May 26, 2020
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Masaki Nagaoka, Nobuaki Kobayashi, Ryuta Kinoshita
  • Publication number: 20200109688
    Abstract: A fuel-injection valve provided with a fuel filter (13) in a fuel supply unit into which fuel flows, wherein: the fuel filter (13) is provided with a filtering part (X1) that is disposed along the circumferential direction of the fuel filter (13) and along the central axis line (13x) thereof and that is provided with a net-like member (13c) which captures foreign objects mixed in with fuel flowing from the radially inner side to the radially outer side of the fuel filter (13); and the fuel filter (13) has, on the upstream side from the filtering part (X1), first fuel swirl generation units (13d-1, 13d-2, 13d-4) which generate swirl in the fuel that flows down along the inner circumferential surface of the filtering part (X1).
    Type: Application
    Filed: March 26, 2018
    Publication date: April 9, 2020
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Eiji TAMURA, Akihiro YAMAZAKI, Takahiro SAITO, Masaki NAGAOKA
  • Publication number: 20180066620
    Abstract: Disclosed is a fuel injection valve comprising: a fuel injection orifice provided in a downstream side of a valve seat which a valve body moves toward and away from; a swirl chamber having a swirl passage formed around the entry opening of the fuel injection orifice; and a transverse passage whose end is opened in an inner circumferential wall of the swirl chamber in order to provide a fuel into the swirl chamber, wherein a center of the entry opening is shifted from a first position where the velocity component in the swirl direction of the fuel can be maximized to a second position where the velocity component in the swirl direction is reduced, and where a velocity component in a center axis direction of the fuel injection orifice is enhanced. Thereby, it is possible to easily adjust a fuel injection amount and a spray angle.
    Type: Application
    Filed: February 5, 2016
    Publication date: March 8, 2018
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Masaki NAGAOKA, Nobuaki KOBAYASHI, Ryuta KINOSHITA
  • Patent number: 9599146
    Abstract: Provided is a vehicle including a vehicle body. The vehicle includes an operating member to be pressed so that the operating member performs an operation, and a wire having a first end and a second end. The first end is closer than the second end to the operating member. The vehicle includes a wire cover slidably covering the wire and slidable relative to the wire. The vehicle includes an actuating section that supports a first portion of the wire cover and that moves the wire cover in a direction away from the first end of the wire in accordance with the operation. The vehicle includes a non-actuating section supporting the first end so that an operation amount of the first end with respect to the vehicle body is smaller than an operation amount of the actuating section with respect to the vehicle body when the operating member performs the operation.
    Type: Grant
    Filed: April 23, 2015
    Date of Patent: March 21, 2017
    Assignee: YAMAHA HATSUDOKI KABUSHIKI KAISHA
    Inventors: Masaki Nagaoka, Yasushi Aoki
  • Publication number: 20150377281
    Abstract: Provided is a vehicle including a vehicle body. The vehicle includes an operating member to be pressed so that the operating member performs an operation, and a wire having a first end and a second end. The first end is closer than the second end to the operating member. The vehicle includes a wire cover slidably covering the wire and slidable relative to the wire. The vehicle includes an actuating section that supports a first portion of the wire cover and that moves the wire cover in a direction away from the first end of the wire in accordance with the operation. The vehicle includes a non-actuating section supporting the first end so that an operation amount of the first end with respect to the vehicle body is smaller than an operation amount of the actuating section with respect to the vehicle body when the operating member performs the operation.
    Type: Application
    Filed: April 23, 2015
    Publication date: December 31, 2015
    Applicant: YAMAHA HATSUDOKI KABUSHIKI KAISHA
    Inventors: Masaki NAGAOKA, Yasushi AOKI
  • Patent number: 9048667
    Abstract: A suppressed noise cell controller includes, corresponding to a number of cell packs, a plurality of ICs each having a voltage detecting circuit detecting voltages of respective cells of a cell pack in which four cells are connected in series, a switch control circuit controlling conduction and a blocking operation of a plurality of switch elements connected in parallel to the respective cells via capacity adjusting resistors, terminal LIN1 for inputting control information, terminal LIN2 for outputting control information, terminal Vcc and GND terminal, and terminal LIN2 of a higher-order IC and terminal LIN1 of a lower-order IC are daisy chain connected. The Vcc terminal of each IC is connected to a positive electrode of a higher-order cell among cells constituting a corresponding cell pack via a noise eliminating inductor, and the GND terminal is coupled directly to Vcc of the lower-order IC. Noise isn't superposed on LIN1 or LIN2.
    Type: Grant
    Filed: January 10, 2012
    Date of Patent: June 2, 2015
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Masaki Nagaoka, Akihiko Kudo, Mutsumi Kikuchi, Kenichiro Tsuru, Tatsumi Yamauchi, Akihiko Emori
  • Patent number: 8760168
    Abstract: An assembled battery total voltage detection circuit includes a main control circuit, a divider resistor connected between a plus terminal and a minus terminal of an assembled battery insulated from the main control circuit, and a differential amplifier circuit that amplifies voltage divided by the divider resistor. A constant electric potential relative to a ground of the main control circuit is applied to a midpoint of the divider resistor. The main control circuit measures the voltage divided by the divider resistor via the differential amplifier circuit.
    Type: Grant
    Filed: February 19, 2009
    Date of Patent: June 24, 2014
    Assignees: Hitachi, Ltd., Hitachi Vehicle Energy, Ltd.
    Inventors: Akihiko Kudo, Mutsumi Kikuchi, Masaki Nagaoka
  • Patent number: 8487590
    Abstract: A cell controller capable of ensuring high safety even when a short occurs among voltage detecting lines without causing increased costs is provided. The cell controller 10 includes a unit cell voltage detecting section 7 to detect a voltage of each unit cell 1 constituting a battery group through each voltage detecting line and a SOC adjusting circuit for adjusting a SOC of each unit cell 1 having resistors 2 for SOC adjustment, switching elements 6, and a bypass control section 8 to exercise on/off control on the switching elements 6. Each resistor 2 is connected in series to each voltage detecting line and the unit cell voltage detecting section 7 to detect a voltage of each unit cell 1 through each of the resistors 2.
    Type: Grant
    Filed: March 25, 2008
    Date of Patent: July 16, 2013
    Assignee: Hitachi Vehicle Energy, Ltd
    Inventors: Akihiko Kudo, Masaki Nagaoka, Kenichiro Tsuru, Mutsumi Kikuchi, Tatsumi Yamauchi, Akihiko Emori
  • Patent number: 8264204
    Abstract: A cell controller with excellent reliability in which noise and soon are suppressed is provided. The cell controller includes, corresponding to the number of cell packs, a plurality of ICs each having a voltage detecting circuit detecting voltages of respective cells of a cell pack in which four cells are connected in series, a switch control circuit controlling conduction and a blocking operation of a plurality of switch elements connected in parallel to the respective cells via capacity adjusting resistors, a LIN1 terminal for inputting control information, a LIN2 terminal for outputting control information, a Vcc terminal and a GND terminal, and a LIN2 terminal of a higher-order IC and a LIN1 terminal of a lower-order IC are connected in a daisy chain.
    Type: Grant
    Filed: January 9, 2008
    Date of Patent: September 11, 2012
    Assignee: Hitachi Vehicle Energy, Ltd.
    Inventors: Masaki Nagaoka, Akihiko Kudo, Mutsumi Kikuchi, Kenichiro Tsuru, Tatsumi Yamauchi, Akihiko Emori
  • Publication number: 20120141848
    Abstract: A suppressed noise cell controller includes, corresponding to a number of cell packs, a plurality of ICs each having a voltage detecting circuit detecting voltages of respective cells of a cell pack in which four cells are connected in series, a switch control circuit controlling conduction and a blocking operation of a plurality of switch elements connected in parallel to the respective cells via capacity adjusting resistors, terminal LIN1 for inputting control information, terminal LIN2 for outputting control information, terminal Vcc and GND terminal, and terminal LIN2 of a higher-order IC and terminal LIN1 of a lower-order IC are daisy chain connected. The Vcc terminal of each IC is connected to a positive electrode of a higher-order cell among cells constituting a corresponding cell pack via a noise eliminating inductor, and the GND terminal is coupled directly to Vcc of the lower-order IC. Noise isn't superposed on LIN1 or LIN2.
    Type: Application
    Filed: January 10, 2012
    Publication date: June 7, 2012
    Applicant: HITACHI VEHICLE ENERGY, LTD.
    Inventors: Masaki Nagaoka, Akihiko Kudo, Mutsumi Kikuchi, Kenichiro Tsuru, Tatsumi Yamauchi, Akihiko Emori
  • Patent number: 7952327
    Abstract: The present invention provides an assembled battery total voltage detection and leak detection apparatus which is reduced in size and is reduced in manufacturing costs. Detection of a total voltage is performed at a measurement time of a total voltage of an assembled battery 1 by connecting an output of a positive electrode resistance voltage dividing circuit composed of resistors 9 and 10 to + input of a differential amplifier 20 and connecting an output of a negative electrode resistance voltage dividing circuit composed of resistors 12 and 11 to ? input of the amplifier 20, and it performs leak detection at a leak detection time by connecting an output of a positive electrode resistance voltage dividing circuit to + input of the amplifier 20 and connecting + input of the amplifier 20 to the minus input of the differential amplifier 20 to measure an output voltage of the amplifier 20.
    Type: Grant
    Filed: April 17, 2007
    Date of Patent: May 31, 2011
    Assignee: Hitachi Vehicle Energy, Ltd.
    Inventors: Akihiko Kudo, Masaki Nagaoka, Akihiko Emori, Takahiro Kawata
  • Publication number: 20090243621
    Abstract: An assembled battery total voltage detection circuit includes a main control circuit, a divider resistor connected between a plus terminal and a minus terminal of an assembled battery insulated from the main control circuit, and a differential amplifier circuit that amplifies voltage divided by the divider resistor. A constant electric potential relative to a ground of the main control circuit is applied to a midpoint of the divider resistor. The main control circuit measures the voltage divided by the divider resistor via the differential amplifier circuit.
    Type: Application
    Filed: February 19, 2009
    Publication date: October 1, 2009
    Applicants: Hitachi, Ltd., Hitachi Vehicle Energy, Ltd.
    Inventors: Akihiko KUDO, Mutsumi KIKUCHI, Masaki NAGAOKA
  • Publication number: 20090021222
    Abstract: A cell controller capable of ensuring high safety even when a short occurs among voltage detecting lines without causing increased costs is provided. The cell controller 10 includes a unit cell voltage detecting section 7 to detect a voltage of each unit cell 1 constituting a battery group through each voltage detecting line and a SOC adjusting circuit for adjusting a SOC of each unit cell 1 having resistors 2 for SOC adjustment, switching elements 6, and a bypass control section 8 to exercise on/off control on the switching elements 6. Each resistor 2 is connected in series to each voltage detecting line and the unit cell voltage detecting section 7 to detect a voltage of each unit cell 1 through each of the resistors 2.
    Type: Application
    Filed: March 25, 2008
    Publication date: January 22, 2009
    Applicant: HITACHI VEHICLE ENERGY, LTD.
    Inventors: Akihiko KUDO, Masaki NAGAOKA, Kenichiro TSURU, Mutsumi KIKUCHI, Tatsumi YAMAUCHI, Akihiko EMORI
  • Publication number: 20080284375
    Abstract: A cell controller with excellent reliability in which noise and soon are suppressed is provided. The cell controller includes, corresponding to the number of cell packs, a plurality of ICs each having a voltage detecting circuit detecting voltages of respective cells of a cell pack in which four cells are connected in series, a switch control circuit controlling conduction and a blocking operation of a plurality of switch elements connected in parallel to the respective cells via capacity adjusting resistors, a LIN1 terminal for inputting control information, a LIN2 terminal for outputting control information, a Vcc terminal and a GND terminal, and a LIN2 terminal of a higher-order IC and a LIN1 terminal of a lower-order IC are connected in a daisy chain.
    Type: Application
    Filed: January 9, 2008
    Publication date: November 20, 2008
    Applicant: HITACHI VEHICLE ENERGY, LTD.
    Inventors: Masaki Nagaoka, Akihiko Kudo, Mutsumi Kikuchi, Kenichiro Tsuru, Tatsumi Yamauchi, Akihiko Emori
  • Publication number: 20080054907
    Abstract: The present invention provides an assembled battery total voltage detection and leak detection apparatus which is reduced in size and is reduced in manufacturing costs. Detection of a total voltage is performed at a measurement time of a total voltage of an assembled battery 1 by connecting an output of a positive electrode resistance voltage dividing circuit composed of resistors 9 and 10 to + input of a differential amplifier 20 and connecting an output of a negative electrode resistance voltage dividing circuit composed of resistors 12 and 11 to ? input of the amplifier 20, and it performs leak detection at a leak detection time by connecting an output of a positive electrode resistance voltage dividing circuit to + input of the amplifier 20 and connecting + input of the amplifier 20 to the minus input of the differential amplifier 20 to measure an output voltage of the amplifier 20.
    Type: Application
    Filed: April 17, 2007
    Publication date: March 6, 2008
    Applicant: HITACHI VEHICLE ENERGY, LTD.
    Inventors: Akihiko Kudo, Masaki Nagaoka, Akihiko Emori, Takahiro Kawata
  • Publication number: 20010045459
    Abstract: A POS system issues a receipt and prints messages, etc. including variable information for each transaction or for each customer on a receipt. The POS system is provided with an output information defining file to define output information such as promotion information, etc. In the output information defining file, a message information having an area to set, for example, a price reduction value (variable information) is defined. The output information is then read as required at the time of printing the receipt and a message is printed on the receipt by adding variable information.
    Type: Application
    Filed: March 17, 1999
    Publication date: November 29, 2001
    Inventors: TAKAMASA KONDO, MASAKI NAGAOKA
  • Patent number: 5582950
    Abstract: A process for producing a wherein an aminium salt infrared light absorber and a positive charge control agent are used in combination while preventing a mutual reaction therebetween. In this toner, the physical contact of the aminium salt compound with the positive charge control agent is avoided (e.g., by separately adding them to respective two separated phases of a binder resin), or alternatively use is made of such a combination of confounds as will not cause a mutual reaction (e.g., a common anion is used).
    Type: Grant
    Filed: April 17, 1995
    Date of Patent: December 10, 1996
    Assignee: Fujitsu Limited
    Inventors: Yoshimichi Katagiri, Kazuyuki Kishimoto, Kazuhiko Kido, Yasufumi Nakamura, Hidenori Fujioka, Masahiro Nishihata, Kazuya Hamada, Masakazu Kinoshita, Hitoshi Kusaba, Ikuya Yamabata, Tetsuro Baba, Haruo Kuroda, Yuzo Horikoshi, Masaki Nagaoka, Yumi Fujisaki, Yuko Ohyama, Eiji Sakurai