Patents by Inventor Hiroyuki Imanishi

Hiroyuki Imanishi 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: 20210036595
    Abstract: A decelerating apparatus includes a brake member, primary and secondary permanent magnets and pole pieces. The primary permanent magnets are arranged in a circumferential direction to face an inner or outer peripheral surface of the brake member with a gap in between. Each of the primary permanent magnets has two opposite magnetic poles arranged in a radial direction. The secondary permanent magnets and the pole pieces are placed in the gap and arranged in the circumferential direction. Each of the secondary permanent magnets has two opposite magnetic poles arranged in the circumferential direction. Each of the pole pieces is positioned between adjacent secondary permanent magnets. Magnetic pole arrangements of adjacent primary permanent magnets are opposite to each other. Magnetic pole arrangements of adjacent secondary permanent magnets are opposite to each other. Each of the secondary permanent magnets has a trapezoidal cross-sectional shape including an upper base and a lower base.
    Type: Application
    Filed: January 23, 2019
    Publication date: February 4, 2021
    Inventors: Kenji IMANISHI, Takuya FUJITA, Hiroyuki YAMAGUCHI, Hiroshi NOGAMI, Yasutaka NOGUCHI, Mitsuo MIYAHARA
  • Publication number: 20210020966
    Abstract: A fuel cell system includes: a fuel cell stack; a first cooling medium circuit through which a cooling medium for cooling the fuel cell stack flows; an ion exchanger that removes ions in the cooling medium; a second cooling medium circuit in which the average ion concentration of the cooling medium is lower than that of the cooling medium in the first cooling medium circuit; a switching valve that switches between a flow state and a low flow state; a pump configured to cause the cooling medium in the second cooling medium circuit to flow into the first cooling medium circuit; and a control unit that, when a stop period of the fuel cell system is longer than a reference period, drives the pump with the switching valve switched to the flow state after the instruction to start the fuel cell system is input.
    Type: Application
    Filed: July 14, 2020
    Publication date: January 21, 2021
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Keita YAMAUE, Yohei OKAMOTO, Hiroyuki IMANISHI
  • Patent number: 10873255
    Abstract: An on-board charger includes input ports, output ports, an AC-DC converter, an isolated DC-DC converter, a first filter, and a second filter. The first filter is connected to the input ports. The first filter includes a first common mode choke coil, a first across-the-line capacitor, and first line bypass capacitors. The second filter is connected between the isolated DC-DC converter and each of the output ports. The second filter includes a second common mode choke coil and second line bypass capacitors.
    Type: Grant
    Filed: June 23, 2020
    Date of Patent: December 22, 2020
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Hiroyuki Takatsuji, Hiroshi Kitada, Naomichi Enoki, Yoshihiro Imanishi
  • Publication number: 20200321856
    Abstract: An on-board charger includes input ports, output ports, an AC-DC converter, an isolated DC-DC converter, a first filter, and a second filter. The first filter is connected to the input ports. The first filter includes a first common mode choke coil, a first across-the-line capacitor, and first line bypass capacitors. The second filter is connected between the isolated DC-DC converter and each of the output ports. The second filter includes a second common mode choke coil and second line bypass capacitors.
    Type: Application
    Filed: June 23, 2020
    Publication date: October 8, 2020
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Hiroyuki TAKATSUJI, Hiroshi KITADA, Naomichi ENOKI, Yoshihiro IMANISHI
  • Publication number: 20200298729
    Abstract: Provided is a method for controlling a fuel cell vehicle capable of informing a user outside of the vehicle of the possibility that the fuel stops power generation and external power-feeding stops, whereby problems due to unexpected stopping of power feeding can be avoided. In a method for controlling a fuel cell vehicle 100 including an external power-feeding device 50, when it is determined that a state of a fuel cell exceeds a limiting point where deterioration of the fuel cell 20 or a failure of a driving device to supply fuel to the fuel cell 20 occurs during external power feeding, warning is issued to outside of the vehicle 10 before the fuel cell 20 stops power generation.
    Type: Application
    Filed: June 11, 2020
    Publication date: September 24, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yohei OKAMOTO, Hiroyuki IMANISHI, Mitsuhiro NADA, Takashi YAMADA
  • Patent number: 10756612
    Abstract: The disclosed is a deceleration device including a cylindrical brake member fixed to a rotary shaft, a plurality of permanent magnets arrayed in a circumferential direction of a circle around the rotary shaft, a cylindrical magnet holder holding the permanent magnets, and a switching mechanism that switches between a braking state and a non-braking state. The plurality of permanent magnets include primary magnets and secondary magnets that are arrayed alternatively in the circumferential direction. When viewed on a surface facing the brake member, north poles of the primary magnets are circumferentially adjacent to and in contact with north poles of the secondary magnets, and south poles of the primary magnets are circumferentially adjacent to and in contact with south poles of the secondary magnets. The magnetic holder is ferromagnetic.
    Type: Grant
    Filed: June 9, 2016
    Date of Patent: August 25, 2020
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Kenji Imanishi, Hiroshi Nogami, Yasutaka Noguchi, Hiroyuki Yamaguchi, Takuya Fujita
  • Publication number: 20200263759
    Abstract: An eddy current damper includes a screw shaft, first permanent magnets, second permanent magnets, a cylindrical magnet holding member, a cylindrical conductive member, and a ball nut meshing with a screw shaft. The screw shaft is movable in the axial direction. The first permanent magnets are arrayed along the circumferential direction around the screw shaft. The second permanent magnet is arranged between the first permanent magnets, wherein the arrangement of magnet poles is inverted between the second permanent magnet and the first permanent magnet. The magnet holding member holds the first permanent magnet and the second permanent magnet. The conductive member is opposed to the first permanent magnets and the second permanent magnets with a gap therebetween. The ball nut is disposed inside the magnet holding member and the conductive member, and is fixed to the magnet holding member or the conductive member.
    Type: Application
    Filed: August 24, 2018
    Publication date: August 20, 2020
    Inventors: Kenji Imanishi, Hiroyuki Yamaguchi, Ryohsuke Masui, Shigeki Nakaminami, Hidenori Kida
  • Patent number: 10744903
    Abstract: Provided is a method for controlling a fuel cell vehicle capable of informing a user outside of the vehicle of the possibility that the fuel cell stops power generation and external power-feeding stops, whereby problems due to unexpected stopping of power feeding can be avoided. In a method for controlling a fuel cell vehicle 100 including an external power-feeding device 50, when it is determined that a state of a fuel cell exceeds a limiting point where deterioration of the fuel cell 20 or a failure of a driving device to supply fuel to the fuel cell 20 occurs during external power feeding, warning is issued to outside of the vehicle 10 before the fuel cell 20 stops power generation.
    Type: Grant
    Filed: November 11, 2015
    Date of Patent: August 18, 2020
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yohei Okamoto, Hiroyuki Imanishi, Mitsuhiro Nada, Takashi Yamada
  • Patent number: 10734881
    Abstract: An eddy current retarder includes a brake drum, a magnet retention ring, and a switch mechanism. The brake drum is fixed to a rotating shaft. The magnet retention ring is arranged inside the drum and retains magnets at regular intervals entirely in a circumferential direction such that the magnets face the inner peripheral surface of the drum. The switch mechanism includes switch plates that switch, during braking, to a state in which magnetic circuits develop between the magnets and the drum, and switch, during non-braking, to a state in which no magnetic circuits develop. Protrusions are provided on an end face of the drum at regular intervals entirely in the circumferential direction. Electricity generating coils are provided in a non-rotating part of a vehicle at regular intervals entirely in the circumferential direction such that the electricity generating coils face the regions of the end face of the drum.
    Type: Grant
    Filed: September 6, 2019
    Date of Patent: August 4, 2020
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Kenji Imanishi, Hiroyuki Yamaguchi, Shotaro Kadokawa, Takuya Fujita, Hiroshi Nogami
  • Patent number: 10701768
    Abstract: The disclosed heat generating apparatus includes: a rotary shaft, a heat generator, a plurality of permanent magnets, a magnet holder, and a heat recovery system. The rotary shaft is rotatably supported by a non-rotative body. The heat generator is fixed to the body. The magnets are arrayed to face the heat generator with a gap such that magnetic pole arrangements of adjacent ones of the magnets are opposite to each other. The magnet holder holds the magnets and is fixed to the rotary shaft. The heat recovery system collects heat generated in the heat generator. A non-magnetic partition wall is provided in the gap between the heat generator and the magnets.
    Type: Grant
    Filed: November 5, 2015
    Date of Patent: June 30, 2020
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Hiroyuki Yamaguchi, Atsushi Seto, Kenji Imanishi, Hiroshi Nogami
  • Patent number: 10680257
    Abstract: The present invention is to prevent the temperature of an electric heater from being higher than or equal to a temperature at which control to reduce power consumption is started to prevent an abrupt decrease in the power consumption of the electric heater in order to secure a power consuming destination of a fuel cell. A fuel cell system 10 includes: a fuel cell 20 that receives the supply of reactant gas to generate power; a fuel cell cooling system 30 for circulating a coolant through the fuel cell 20 to cool the fuel cell 20; an electric heater 40 operated to consume power of the fuel cell 20 and driven to decrease power consumption abruptly at a temperature lower than a decomposition temperature of the coolant; and a heater cooling system 50 for circulating the coolant around the electric heater 40 to cool the electric heater 40.
    Type: Grant
    Filed: October 28, 2015
    Date of Patent: June 9, 2020
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Takashi Yamada, Hiroyuki Imanishi, Mitsuhiro Nada
  • Publication number: 20200167657
    Abstract: A training apparatus includes one or more memories and one or more processors. The one or more processors are configured to generate a graph based on a path of an error backward propagation, assign an identifier to each node based on the path of the error backward propagation in the graph, and execute the error backward propagation based on the graph and on the identifier.
    Type: Application
    Filed: November 25, 2019
    Publication date: May 28, 2020
    Applicant: Preferred Networks, Inc.
    Inventors: Seiya TOKUI, Daisuke NISHINO, Hiroyuki Vincent YAMAZAKI, Naotoshi SEO, Akifumi IMANISHI
  • Patent number: 10667334
    Abstract: The disclosed heat generating apparatus includes: a rotary shaft, a heat generator, a plurality of permanent magnets, a magnet holder, and a heat recovery system. The rotary shaft is rotatably supported by a non-rotative body. The heat generator is fixed to the rotary shaft. The magnets are arrayed to face the heat generator with a gap such that magnetic pole arrangements of adjacent ones of the magnets are opposite to each other. The magnet holder holds the magnets and is fixed to the body. The heat recovery system collects heat generated in the heat generator.
    Type: Grant
    Filed: November 5, 2015
    Date of Patent: May 26, 2020
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Hiroyuki Yamaguchi, Atsushi Seto, Kenji Imanishi, Hiroshi Nogami
  • Patent number: 10665876
    Abstract: A control unit of a fuel cell system includes a valve control unit configured such that, when it is determined that an exhaust valve is stuck open in a quick warming-up operation, the valve control unit sets at least one of an operable opening area which is an opening area capable of being changed by control and a rate of opening change which is an opening changeable frequency at which an opening is changeable per unit time, for at least one of a pressure adjusting valve and a flow division valve, such that a flow rate of a cathode gas supplied to a fuel cell is in an allowable range of a requested supply flow rate required for the quick warming-up operation.
    Type: Grant
    Filed: December 5, 2017
    Date of Patent: May 26, 2020
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tomio Yamanaka, Masashi Toida, Hiroyuki Imanishi, Seiichi Tanaka
  • Patent number: 10629928
    Abstract: A fuel cell system includes a fuel cell, an oxidizing gas supplier, an oxidizing gas supply pipe, an oxidizing gas discharge pipe, a fuel gas supply pipe, a fuel gas return pipe, a fuel gas discharge valve, and a controller. The controller executes valve closing control to close the fuel gas discharge valve; and determines the flow rate of a diluent gas to be supplied to an oxidizing gas supply portion by the oxidizing gas supplier according to the flow rate of a leakage gas flowing from the fuel gas discharge valve to the oxidizing gas discharge pipe after the execution of the valve closing control. The flow rate of the diluent gas to be supplied to the oxidizing gas supply portion is determined to increase as the flow rate of the leakage gas increases.
    Type: Grant
    Filed: November 21, 2017
    Date of Patent: April 21, 2020
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hiroyuki Imanishi, Tomio Yamanaka, Masashi Toida
  • Patent number: 10630335
    Abstract: A signal transmission and reception element transmits and receives a differential signal. Two transmission lines transmit the differential signal between the signal transmission and reception element and a connector. The signal transmission and reception element is connected to an external apparatus with the connector interposed therebetween. A noise generation source generates noise in a wireless band, which is coupled to the transmission lines. An antenna has a gain in a frequency band of the noise which is generated in the noise generation source. A wireless signal processing circuit processes a signal received by the antenna. An absorption-type filter that is mounted on the transmission lines absorbs noise mixed in the transmission lines.
    Type: Grant
    Filed: October 20, 2017
    Date of Patent: April 21, 2020
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Kota Saito, Yoshihiro Imanishi, Hiroshi Kitada, Hiroyuki Takatsuji, Masashi Omuro
  • Publication number: 20200067397
    Abstract: A retarder includes a rotor, a plurality of fins, a plurality of permanent magnets, a switching mechanism, a first cover, a second cover, and a cover-switching mechanism. The fins are provided on an outer peripheral surface of the rotor and inclined with respect to a rotation direction of the rotor. The magnets are arranged inside the rotor. The first cover faces an end face of the rotor and includes a plurality of holes. The second cover protrudes from an outer circumferential edge of the first cover toward a rotor side. The cover-switching mechanism opens the holes in the braking state and closes the holes in the non-braking state. The first cover is disposed on a side on which a leading end portion of each fin is present. The retarder achieves suppressing windage and ensuring a heat dissipation performance.
    Type: Application
    Filed: October 3, 2017
    Publication date: February 27, 2020
    Inventors: Hiroshi NOGAMI, Kenji IMANISHI, Yasutaka NOGUCHI, Hiroyuki YAMAGUCHI, Shotaro KADOKAWA, Takuya FUJITA
  • Patent number: 10573908
    Abstract: A fuel cell system used in a vehicle equipped with a fuel cell includes: a fuel cell; a fuel gas supply portion which supplies a fuel gas to the fuel cell; a fuel gas discharge portion which discharges exhaust fuel gas from the fuel cell; and a control unit, in which, when an operation of the fuel cell is ended, the control unit performs (a) an exhaust process of discharging the exhaust fuel gas of the fuel cell to reduce a pressure, and (b) a process of increasing a partial pressure of the fuel gas in the fuel cell by supplying the fuel gas to the fuel cell after the exhaust process.
    Type: Grant
    Filed: November 10, 2015
    Date of Patent: February 25, 2020
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hiroyuki Imanishi, Kazuo Yamamoto
  • Publication number: 20190393519
    Abstract: When a time period from a stop to a start of a fuel cell system exceeds a predetermined time period, a controller of the fuel cell system obtains a first electrical conductivity of a cooling medium that is placed from a radiator to before a connecting location of one end portion in a cooling medium circulation flow path and a second electrical conductivity of the cooling medium that is placed on a downstream side of an ion exchanger in a bypass flow path, and uses the obtained first electrical conductivity and second electrical conductivity and a predetermined target electrical conductivity of a supply cooling medium to control the operation of a flow dividing valve such that the electrical conductivity of the supply cooling medium becomes equal to or less than the target electrical conductivity and thereby regulate a flow rate ratio.
    Type: Application
    Filed: June 18, 2019
    Publication date: December 26, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Keita YAMAUE, Hiroyuki IMANISHI, Tomotaka ISHIKAWA
  • Publication number: 20190393764
    Abstract: An eddy current retarder includes a brake drum, a magnet retention ring, and a switch mechanism. The brake drum is fixed to a rotating shaft. The magnet retention ring is arranged inside the drum and retains magnets at regular intervals entirely in a circumferential direction such that the magnets face the inner peripheral surface of the drum. The switch mechanism includes switch plates that switch, during braking, to a state in which magnetic circuits develop between the magnets and the drum, and switch, during non-braking, to a state in which no magnetic circuits develop. Protrusions are provided on an end face of the drum at regular intervals entirely in the circumferential direction. Electricity generating coils are provided in a non-rotating part of a vehicle at regular intervals entirely in the circumferential direction such that the electricity generating coils face the regions of the end face of the drum.
    Type: Application
    Filed: September 6, 2019
    Publication date: December 26, 2019
    Inventors: Kenji IMANISHI, Hiroyuki YAMAGUCHI, Shotaro KADOKAWA, Takuya FUJITA, Hiroshi NOGAMI