Patents by Inventor Yuji Yamaguchi

Yuji Yamaguchi 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: 20210141366
    Abstract: A factory management system has a database for managing a factory in which a production line is provided. The factory management system includes a communication unit, a collection and storage unit and a compilation and display unit. The communication unit connects production facilities of the production line with host systems such that the production facilities and the host systems communicate with each other. The collection and storage unit is one of the host systems and collects production status data on a production status from the production facilities via the communication unit and stores the production status data in the database. The compilation and display unit is provided separately from the collection and storage unit via a communication interface. The compilation and display unit compiles a predetermined data out of the production status data stored in the database and display the first predetermined data.
    Type: Application
    Filed: November 10, 2020
    Publication date: May 13, 2021
    Applicant: JTEKT CORPORATION
    Inventors: Yuji YAMAGUCHI, Yasuhiro KONDOU, Kazunori AKIYAMA
  • Publication number: 20210135513
    Abstract: A permanent-magnet synchronous motor and an electric power steering device are driven by a first system including a first armature winding and a first control apparatus and by a second system including a second armature winding and a second control apparatus and are configured in such a way that if one system fails, driving by the one system is stopped but the driving is continued by the other system.
    Type: Application
    Filed: September 7, 2017
    Publication date: May 6, 2021
    Applicant: Mitsubishi Electric Corporation
    Inventors: Yuji TAKIZAWA, Hiroko IKEDA, Kazumasa ITO, Shinich YAMAGUCHI, Yu HIROTANI, Satoru AKUTSU
  • Patent number: 10998280
    Abstract: Provided is a balance-unbalance converter including: a substrate; an unbalanced line; a first balanced line; and a second balanced line on the substrate. The unbalanced line has a first end at which an unbalanced signal is input, and an opened second end. The first balanced line is in parallel with a line portion of the unbalanced line from the first end to a midpoint of the unbalanced line, and has a midpoint-side third end at which a balanced signal is output, and a grounded fourth end. The second balanced line is in parallel with a line portion of the unbalanced line from the second end to the midpoint, and has a midpoint-side fifth end at which the balanced signal is output, and a grounded sixth end. The unbalanced line is bent at the midpoint toward an opposite side of the first and second balanced lines.
    Type: Grant
    Filed: February 19, 2019
    Date of Patent: May 4, 2021
    Assignee: ANRITSU CORPORATION
    Inventors: Michihiko Ikeda, Yuji Sekine, Takao Yamaguchi
  • Publication number: 20210123122
    Abstract: This steel sheet has a predetermined chemical composition, in which a steel structure of an inside of the steel sheet contains, by volume fraction, soft ferrite: 0% to 30%, retained austenite: 3% to 40%, fresh martensite: 0% to 30%, a sum of pearlite and cementite: 0% to 10%, and a remainder includes hard ferrite, in the inside of the steel sheet, a number proportion of the retained austenite having an aspect ratio of 2.0 or more in the total retained austenite is 50% or more, a soft layer having a thickness of 1 to 100 ?m from a surface in a sheet thickness direction is present, in ferrite contained in the soft layer, a volume fraction of grains having an aspect ratio of less than 3.0 is 50% or more, the volume fraction of retained austenite in the soft layer is less than 50% of the volume fraction of the retained austenite of the inside of the steel sheet, and a peak of an emission intensity at a wavelength indicating Si appears in a range of more than 0.2 ?m and 5.0 ?m or less from the surface.
    Type: Application
    Filed: March 30, 2018
    Publication date: April 29, 2021
    Applicant: Nippon Steel Corporation
    Inventors: Takafumi YOKOYAMA, Kohichi SANO, Riki OKAMOTO, Hiroyuki KAWATA, Eisaku SAKURADA, Yuji YAMAGUCHI, Kazuki SHIOKAWA, Yuichi NAKAHIRA, Kohei UEDA, Masahiro NAKATA, Satoshi UCHIDA
  • Publication number: 20210115839
    Abstract: An engine control apparatus includes an ignition control section and an injection control section. When partial compression ignition combustion is carried out, the ignition control section causes an ignition plug to carry out: main ignition in which a spark is generated in a late period of a compression stroke or an initial period of an expansion stroke to initiate the SI combustion; and preceding ignition in which the spark is generated at earlier timing than the main ignition. Also, when the partial compression ignition combustion is carried out, the injection control section causes the injector to inject fuel at such timing that the fuel exists in a cylinder at an earlier time point than the preceding ignition. Energy of the preceding ignition is set to be higher when an engine speed is high than when the engine speed is low.
    Type: Application
    Filed: April 23, 2019
    Publication date: April 22, 2021
    Inventors: Kota MATSUMOTO, Tomonori URUSHIHARA, Keiji MARUYAMA, Masanari SUEOKA, Ryohei ONO, Yuji HARADA, Toru MIYAMOTO, Atsushi INOUE, Tatsuhiro TOKUNAGA, Takuya OHURA, Yusuke KAWAI, Tomohiro NISHIDA, Keita ARAI, Yodai YAMAGUCHI
  • Publication number: 20210095356
    Abstract: A steel sheet according to an aspect of the present invention has a predetermined chemical composition, in which a steel structure of an inside of the steel sheet contains, by volume fraction, soft ferrite: 0% to 30%, retained austenite: 3% to 40%, fresh martensite: 0% to 30%, a sum of pearlite and cementite: 0% to 10%, and a remainder including hard ferrite, in the inside of the steel sheet, a number proportion of the retained austenite having an aspect ratio of 2.0 or more in the total retained austenite is 50% or more, a soft layer having a thickness of 1 ?m to 100 ?m from the surface is present in a sheet thickness direction, among ferrite contained in the soft layer, a volume fraction of grains having an aspect ratio of less than 3.0 is 50% or more, a volume fraction of retained austenite in the soft layer is 50% or more of the volume fraction of the retained austenite of the inside of the steel sheet, and a peak of an emission intensity at a wavelength indicating Si appears in a range of more than 0.
    Type: Application
    Filed: March 30, 2018
    Publication date: April 1, 2021
    Applicant: NIPPON STEEL CORPORATION
    Inventors: Takafumi YOKOYAMA, Kohichi SANO, Riki OKAMOTO, Hiroyuki KAWATA, Eisaku SAKURADA, Yuji YAMAGUCHI, Kazuki SHIOKAWA, Yuichi NAKAHIRA, Kohei UEDA, Masahiro NAKATA, Satoshi UCHIDA
  • Patent number: 10953631
    Abstract: There is provided a hot-dip galvanized steel sheet with a microstructure in a ? thickness to ? thickness range whose middle is a ¼ thickness from a surface of a base steel sheet, the microstructure contains ferrite phase is 50% or more and 97% or less by volume fraction, and a predetermined phase wherein at an interface between a hot-dip galvanizing layer and the base steel sheet, a Fe—Al alloy layer has an average thickness of 0.1 ?m to 2.0 ?m, and a difference between a maximum thickness and a minimum thickness in a steel sheet width direction is within 0.5 ?m, and in a fine-grain layer directly brought into contact with the Fe—Al alloy layer, the fine-grain has a difference between a maximum thickness and a minimum thickness of the fine-grain layer in the steel sheet width direction is within 2.0 ?m.
    Type: Grant
    Filed: July 31, 2017
    Date of Patent: March 23, 2021
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Atsushi Morishita, Taihei Kaneto, Satoshi Uchida, Tatsuya Nakada, Yuji Yamaguchi
  • Publication number: 20210047716
    Abstract: A steel sheet includes a hot-dip galvanized layer or a galvannealed layer on a surface of the steel sheet, the steel sheet including: in mass %, C: 0.06% or more and 0.22% or less; Si: 0.50% or more and 2.00% or less; Mn: 1.50% or more and 2.80% or less; Al: 0.02% or more and 1.00% or less; P: 0.001% or more and 0.100% or less; S: 0.0005% or more and 0.0100% or less; N: 0.0005% or more and 0.0100% or less; and a balance: Fe and impurities.
    Type: Application
    Filed: March 30, 2018
    Publication date: February 18, 2021
    Applicant: NIPPON STEEL CORPORATION
    Inventors: Kohichi SANO, Hiroyuki KAWATA, Yuji YAMAGUCHI, Satoshi UCHIDA, Yoshinori IMAI, Riki OKAMOTO
  • Patent number: 10889879
    Abstract: A steel sheet having a specific chemical composition and structure represented by, by area ratio, ferrite: 5 to 95%, and bainite: 5 to 95%. The proportion of crystal grains having an intragranular misorientation of 5 to 14° to all crystal grains is 20 to 100% by area ratio. Hard crystal grains A in which precipitates or clusters with a maximum diameter of 8 nm or less are dispersed in the crystal grains with a number density of 1×1016 to 1×1019 pieces/cm3. Soft crystal grains B in which precipitates or clusters with a maximum diameter of 8 nm or less are dispersed in the crystal grains with a number density of 1×1015 pieces/cm3 or less are contained. The volume % of the hard crystal grains A/(the volume % of the hard crystal grains A+the volume % of the soft crystal grains B) is 0.1 to 0.9.
    Type: Grant
    Filed: August 4, 2017
    Date of Patent: January 12, 2021
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Kohichi Sano, Makoto Uno, Ryoichi Nishiyama, Yuji Yamaguchi, Natsuko Sugiura, Masahiro Nakata
  • Patent number: 10822683
    Abstract: A hot-dip galvanized steel sheet includes a base steel sheet and a hot-dip galvanized layer formed on at least one surface of the base steel sheet, in which the hot-dip galvanized layer includes Fe in a content of more than 0% to 5% or less, Al in a content of more than 0% to 1.0% or less, and columnar grains formed by a ? phase on the surface of the steel sheet, further, 20% or more of the entire interface between the hot-dip galvanized layer and the base steel sheet is coated with the ? phase, and a ratio of an interface formed between ? grains in which coarse oxides are present among grains and the base steel sheet with respect to the entire interface between the ? phase and the base steel sheet in the hot-dip galvanized layer is 50% or less, the base steel sheet has predetermined chemical components and a refined layer in direct contact with the interface between the base steel sheet and the hot-dip galvanized layer, an average thickness of the refined layer is 0.1 to 5.
    Type: Grant
    Filed: November 5, 2015
    Date of Patent: November 3, 2020
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Hiroyuki Kawata, Takeshi Yasui, Kohei Ueda, Naoki Maruyama, Yuji Yamaguchi, Satoshi Uchida, Ryosuke Komami, Hayato Arai, Toyomitsu Nakamura
  • Patent number: 10822684
    Abstract: A hot-dip galvanized steel sheet includes a base steel sheet and a hot-dip galvanized layer formed on at least one surface of the base steel sheet, in which the hot-dip galvanized layer includes Fe in a content of more than 0% to 5% or less, Al in a content of more than 0% to 1.0% or less, and columnar grains formed by a ? phase on the surface of the steel sheet, further, 20% or more of the entire interface between the hot-dip galvanized layer and the base steel sheet is coated with the ? phase, and a ratio of an interface formed between ? grains in which coarse oxides are present among ? grains and the base steel sheet with respect to the entire interface between the ? phase and the base steel sheet in the hot-dip galvanized layer is 50% or less, the base steel sheet has predetermined chemical components and a refined layer in direct contact with the interface between the base steel sheet and the hot-dip galvanized layer, an average thickness of the refined layer is 0.1 to 5.
    Type: Grant
    Filed: November 5, 2015
    Date of Patent: November 3, 2020
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Hiroyuki Kawata, Takeshi Yasui, Kohei Ueda, Naoki Maruyama, Yuji Yamaguchi, Satoshi Uchida, Ryosuke Komami, Hayato Arai, Toyomitsu Nakamura
  • Patent number: 10781765
    Abstract: An internal combustion engine comprises an exhaust purification catalyst, a downstream side air-fuel ratio sensor which is arranged at a downstream side of the exhaust purification catalyst, and an air flow meter which detects an amount of intake air. The control system of the internal combustion engine controls the exhaust air-fuel ratio to a target air-fuel ratio by feedback control, sets the target air-fuel ratio at a lean air-fuel ratio when the output air-fuel ratio of the downstream side air-fuel ratio sensor becomes a rich air-fuel ratio, and sets the target air-fuel ratio at a rich air-fuel ratio when the output air-fuel ratio of the downstream side air-fuel ratio sensor becomes a lean air-fuel ratio.
    Type: Grant
    Filed: July 28, 2015
    Date of Patent: September 22, 2020
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Koichi Hoshi, Norihisa Nakagawa, Shuntaro Okazaki, Yuji Yamaguchi
  • Patent number: 10738384
    Abstract: A surface-treated steel sheet for fuel tanks, including a Zn—Ni alloy plating layer on one surface or both surfaces of a steel sheet; and a trivalent chromate covering layer or a chromate-free covering layer on the Zn—Ni alloy plating layer, wherein, in a surface outermost layer of the trivalent chromate covering layer or the chromate-free covering layer, concavities, of which a depth from an arithmetic average height of a cross-sectional curve of the surface outermost layer is more than or equal to 0.1 ?m, exist in a proportion of 50 to 1000 concavities/mm2 and at an area ratio of 20 to 80% to a surface area of the steel sheet.
    Type: Grant
    Filed: August 29, 2016
    Date of Patent: August 11, 2020
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Hiromasa Shoji, Taihei Kaneto, Masahiro Fuda, Hironori Sato, Natsuko Sugiura, Yuji Yamaguchi
  • Publication number: 20200232083
    Abstract: A hot-dip galvanized steel sheet including: a hot-dip galvanizing layer on at least one side of a base steel sheet, wherein the hot-dip galvanizing layer has a Fe content of more than 0% and 3.0% or less and an Al content of more than 0% and 1.0% or less, the hot-dip galvanized steel sheet including: a Fe—Al alloy layer provided on an interface between the hot-dip galvanizing layer and the base steel sheet, the Fe—Al alloy layer having a thickness of 0.1 ?m to 2.0 ?m, and a difference between a maximum value and a minimum value of the thickness of the Fe—Al alloy layer in a width direction of the base steel sheet being within 0.5 ?m; and a fine-grain layer provided in the base steel sheet and directly in contact with the Fe—Al alloy layer, the fine-grain layer having an average thickness of 0.1 ?m to 5.0 ?m, the fine-grain layer including a ferrite phase with an average grain diameter of 0.1 ?m to 3.
    Type: Application
    Filed: July 31, 2017
    Publication date: July 23, 2020
    Applicant: NIPPON STEEL CORPORATION
    Inventors: Atsushi MORISHITA, Taihei KANETO, Satoshi UCHIDA, Tatsuya NAKADA, Yuji YAMAGUCHI
  • Publication number: 20200230918
    Abstract: In a specific thickness range of which center is a ¼ thickness from the surface of a base steel sheet, a volume fraction of a ferrite phase is 0% or more and less than 50%, a volume fraction of the total of a hard structure composed of one or more of a bainite structure, a bainitic ferrite phase, a fresh martensite phase, and a tempered martensite phase is 50% or more, a volume fraction of a retained austenite phase is 0% to 8%, and a volume fraction of the total of a pearlite phase and a coarse cementite phase is 0% to 8%, at an interface between a plating layer and the base steel sheet, a Fe—Al alloy layer is provided, the Fe—Al alloy layer having an average thickness of 0.1 ?m to 2.0 ?m and a difference between a maximum thickness and a minimum thickness in the width direction of the steel sheet being within 0.
    Type: Application
    Filed: July 31, 2017
    Publication date: July 23, 2020
    Applicant: NIPPON STEEL CORPORATION
    Inventors: Atsushi MORISHITA, Taihei KANETO, Satoshi UCHIDA, Tatsuya NAKADA, Yuji YAMAGUCHI
  • Patent number: 10704132
    Abstract: A high-strength hot-dip galvanized steel sheet excellent in impact resistance and worked portion corrosion resistance including a hot-dip galvanized plating layer on a steel sheet base material whose tensile strength is 590 MPa or more, wherein the plating layer includes projecting alloy layers being in contact with the steel sheet base material, a number density of the projecting alloy layers is 4 pieces/mm or more, wherein the steel sheet base material includes: a miniaturized layer being directly in contact with the interface between the steel sheet base material and the plating layer; a decarburized layer being in contact with the miniaturized layer; and an inner layer other than the miniaturized layer and the decarburized layer, and one or more kinds of oxides of Si and Mn are contained in layers of the miniaturized layer, the decarburized layer, and the projecting alloy layers.
    Type: Grant
    Filed: February 25, 2016
    Date of Patent: July 7, 2020
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Takeshi Yasui, Hiroyuki Kawata, Yuji Yamaguchi, Ryosuke Komami, Satoshi Uchida, Akinobu Murasato
  • Patent number: 10697387
    Abstract: An internal combustion engine comprises an exhaust purification catalyst and a downstream side air-fuel ratio sensor which is arranged at the downstream side of the exhaust purification catalyst. The control system performs feedback control so that the air-fuel ratio of the exhaust gas becomes the target air-fuel ratio, and performs learning control to correct the control center air-fuel ratio based on the output air-fuel ratio of the downstream side sensor. The target air-fuel ratio is switched to the lean air-fuel ratio when the output air-fuel ratio of the downstream side sensor becomes the rich judged air-fuel ratio and is switched to the rich air-fuel ratio when the output air-fuel ratio becomes the lean judged air-fuel ratio.
    Type: Grant
    Filed: June 19, 2015
    Date of Patent: June 30, 2020
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Shuntaro Okazaki, Norihisa Nakagawa, Yuji Yamaguchi
  • Publication number: 20200156349
    Abstract: There is provided a hot-dip galvanized steel sheet with a microstructure in a ? thickness to ? thickness range whose middle is a ¼ thickness from a surface of a base steel sheet, the microstructure contains ferrite phase is 50% or more and 97% or less by volume fraction, and a predetermined phase wherein at an interface between a hot-dip galvanizing layer and the base steel sheet, a Fe—Al alloy layer has an average thickness of 0.1 ?m to 2.0 ?m, and a difference between a maximum thickness and a minimum thickness in a steel sheet width direction is within 0.5 ?m, and in a fine-grain layer directly brought into contact with the Fe—Al alloy layer, the fine-grain has a difference between a maximum thickness and a minimum thickness of the fine-grain layer in the steel sheet width direction is within 2.0 ?m.
    Type: Application
    Filed: July 31, 2017
    Publication date: May 21, 2020
    Applicant: NIPPON STEEL CORPORATION
    Inventors: Atsushi MORISHITA, Taihei KANETO, Satoshi UCHIDA, Tatsuya NAKADA, Yuji YAMAGUCHI
  • Patent number: 10651060
    Abstract: A substrate treating method dries a substrate on a surface of which a predetermined pattern is formed. The substrate treating method includes: a washing step of washing the substrate by immersing the substrate into a washing liquid after the washing liquid is stored into the treating tank in a sealed chamber; a decompression step of decompressing an inside of the chamber; a lifting step of lifting the substrate from the washing liquid stored in the treating tank; a liquid discharge step of discharging the washing liquid from the treating tank; and a hydrophobing step of replacing an atmosphere in the chamber with a hydrophobic agent and performing a hydrophobing treatment on the surface of the substrate.
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: May 12, 2020
    Assignee: SCREEN Holdings Co., Ltd.
    Inventors: Yuji Yamaguchi, Masahiro Kimura
  • Patent number: 10626815
    Abstract: The internal combustion engine comprises an exhaust purification catalyst and downstream side air-fuel ratio sensor. The control system performs feedback control so that the air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst becomes a target air-fuel ratio and performs learning control which corrects the control center air-fuel ratio based on the output air-fuel ratio of the downstream side air-fuel ratio sensor. The target air-fuel ratio is switched between the lean air-fuel ratio and the rich air-fuel ratio. In the learning control, when the target air-fuel ratio is set to the rich air-fuel ratio and the output air-fuel ratio of the downstream side air-fuel ratio sensor is maintained in an air-fuel ratio region in proximity to the stoichiometric air-fuel ratio for the stoichiometric air-fuel ratio judgment time or more, stoichiometric air-fuel ratio stuck learning is performed, changing air-fuel ratio of the exhaust gas to the rich side.
    Type: Grant
    Filed: July 23, 2015
    Date of Patent: April 21, 2020
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Shuntaro Okazaki, Norihisa Nakagawa, Yuji Yamaguchi