Patents by Inventor Yutaka Hotta

Yutaka Hotta 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: 20190316698
    Abstract: A pressure reducing valve includes: a housing having an input port, an input channel connected to the input port, a pressure reducing chamber connected to the input channel, a delivery channel connected to the pressure reducing chamber, an output channel and an auxiliary channel branched off from the delivery channel, an output port connected to the output channel, and an auxiliary port connected to the auxiliary channel; and a valve mechanism which is provided inside the pressure reducing chamber connected to the delivery channel and of which the amount of opening is changed to regulate the pressure inside the pressure reducing chamber. Centerlines of the delivery channel, the output channel, and the auxiliary channel are arranged in the same plane.
    Type: Application
    Filed: April 9, 2019
    Publication date: October 17, 2019
    Applicant: JTEKT CORPORATION
    Inventors: Toshikatsu Kubo, Akira Nakano, Yuya Kihara, Yutaka Hotta, Akira Yamashita
  • Patent number: 10404188
    Abstract: A power conversion device that includes an inverter circuit in which arms are connected in parallel to each other between a DC positive terminal and a DC negative terminal in accordance with a number of phases of alternating currents of the plurality of phases, the arms for respective phases each including two switch sections that are connected in series and to be brought into conduction in an on state and out of conduction in an off state, and a connection point between the two switch sections of each of the arms is set as an AC input or output point of each phase; and a controller that outputs switching control signals for performing switching control on the switch sections.
    Type: Grant
    Filed: November 7, 2016
    Date of Patent: September 3, 2019
    Assignee: AISIN AW CO., LTD.
    Inventors: Subrata Saha, Arinori Shimada, Yutaka Hotta
  • Patent number: 10312827
    Abstract: A power conversion device that includes an inverter circuit in which arms are connected in parallel to each other between a DC positive terminal and a DC negative terminal in accordance with a number of phases of alternating currents of a plurality of phases, the arms for the respective phases each including two switch sections that are connected in series and to be brought into conduction in an on state and out of conduction in an off state, the power conversion device being configured to convert electric power between DC power and AC power of the plurality of phases while a connection point between the two switch sections of each of the arms is set as an AC input or output point of each phase.
    Type: Grant
    Filed: November 15, 2016
    Date of Patent: June 4, 2019
    Assignee: AISIN AW CO., LTD.
    Inventors: Subrata Saha, Arinori Shimada, Yutaka Hotta
  • Patent number: 10270105
    Abstract: In order to improve a power density of a fuel cell and prevent a generation of a poor insulation, an insulator is provided, which is disposed between a current collector disposed in contact with one end of a stacked body having a plurality of stacked unit cells in stacking directions, and an end member disposed outside from the current collector in the stacking directions, and includes a plurality of insulator members, each having a sheet-like planar portion. The plurality of insulator members which are stacked onto each other by the planar portions thereof are disposed oppose to the current collector.
    Type: Grant
    Filed: November 4, 2015
    Date of Patent: April 23, 2019
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yutaka Hotta, Tateki Takayama, Makoto Takeyama
  • Patent number: 10236520
    Abstract: A gas-liquid separator includes a gas-liquid separator forming portion that is provided in an end plate, and a cover member. The gas-liquid separator forming portion includes a first inner wall portion that serves as a flow path for an off-gas and forms a part of an accumulating portion, the first inner wall portion having a shape recessed in a thickness direction of the end plate. The cover member includes a second inner wall portion that has a shape recessed in a thickness direction of the cover member, the second inner wall portion being disposed to face the first inner wall portion in a stack direction and forming the accumulating portion together with the first inner wall portion.
    Type: Grant
    Filed: November 12, 2015
    Date of Patent: March 19, 2019
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yutaka Hotta, Michitaro Itoga, Tateki Takayama
  • Publication number: 20190072988
    Abstract: A pressure reducing valve includes a body, an annular valve seat, a valve element, and a pressing mechanism configured to press the valve element. The pressing mechanism includes a plug provided downstream of the valve seat and having a plug hole, and a pin including a sliding portion and an upstream end, the sliding portion having a shaft shape and being inserted in the plug hole such that a gap is provided between the sliding portion and an inner peripheral surface of the plug hole, and the upstream end being provided upstream of the sliding portion so as to contact the valve element. A fitting length of the sliding portion with respect to the plug hole and the gap between the sliding portion and the plug hole satisfy 0.0005 L<C<0.00908 L, where L indicates the fitting length, and C indicates the gap.
    Type: Application
    Filed: August 23, 2018
    Publication date: March 7, 2019
    Applicants: JTEKT Corporation, Toyota Jidosha Kabushiki Kaisha, Soken, Inc.
    Inventors: Kazuhisa SUGIYAMA, Koji Nishi, Akira Nakano, Yutaka Hotta, Akira Yamashita, Shota Yamamoto, Yasushi Mitsuishi
  • Publication number: 20180287510
    Abstract: A power conversion device that includes an inverter circuit in which arms are connected in parallel to each other between a DC positive terminal and a DC negative terminal in accordance with a number of phases of alternating currents of the plurality of phases, the arms for respective phases each including two switch sections that are connected in series and to be brought into conduction in an on state and out of conduction in an off state, and a connection point between the two switch sections of each of the arms is set as an AC input or output point of each phase; and a controller that outputs switching control signals for performing switching control on the switch sections.
    Type: Application
    Filed: November 7, 2016
    Publication date: October 4, 2018
    Applicant: AISIN AW CO., LTD.
    Inventors: Subrata SAHA, Arinori SHIMADA, Yutaka HOTTA
  • Publication number: 20180278178
    Abstract: A power conversion device that includes an inverter circuit in which arms are connected in parallel to each other between a DC positive terminal and a DC negative terminal in accordance with a number of phases of alternating currents of a plurality of phases, the arms for the respective phases each including two switch sections that are connected in series and to be brought into conduction in an on state and out of conduction in an off state, the power conversion device being configured to convert electric power between DC power and AC power of the plurality of phases while a connection point between the two switch sections of each of the arms is set as an AC input or output point of each phase.
    Type: Application
    Filed: November 15, 2016
    Publication date: September 27, 2018
    Applicant: AISIN AW CO., LTD.
    Inventors: Subrata SAHA, Arinori SHIMADA, Yutaka HOTTA
  • Patent number: 10044052
    Abstract: The gas liquid separator comprises a gas liquid separator-forming portion formed in an end plate of a fuel cell to have an opening at an end face of the end plate and that constitutes part of the gas liquid separator; and a cover member located to cover the opening and is combined with the gas liquid separator-forming portion to constitute the gas liquid separator. The gas liquid separator-forming portion includes a first inner wall portion provided to serve as a flow path of the off-gas and form part of a reservoir and that is configured to include an off-gas outlet, to be connected with the opening and to be formed concave in a thickness direction of the end plate; and a surrounding portion protruded from the first inner wall portion along a first direction from the gas liquid separator-forming portion toward the cover member to surround the off-gas outlet.
    Type: Grant
    Filed: November 6, 2015
    Date of Patent: August 7, 2018
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yutaka Hotta, Michitaro Itoga, Tateki Takayama
  • Patent number: 9985300
    Abstract: In order to prevent a reduction in workability when inserting an insulator, the insulator is to be disposed between a stacked body having a cell stack including a plurality of stacked unit cells and an end member to be disposed outward from the cell stack in stacking directions of the plurality of unit cells, and a covering to be disposed so as to separate in a perpendicular direction to the stacking directions from a side face of the stacked body parallel to the stacking directions. In a state where an end portion of the end member in the perpendicular direction is closer to the covering than an end portion of the cell stack in the perpendicular direction, and the insulator is disposed between the stacked body and the covering, the insulator includes a planar portion for covering at least a part of the side face, and a protruded portion disposed in the planar portion and protruded toward one or more unit cells near the end member among the plurality of unit cells constituting the cell stack.
    Type: Grant
    Filed: October 27, 2015
    Date of Patent: May 29, 2018
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yutaka Hotta, Hiroaki Nishiumi, Tateki Takayama
  • Publication number: 20180136672
    Abstract: A pressure reducing valve device includes a first body; a second body; a valve mechanism accommodated in the first body, and including a valve seat and a valve element; and a piston that is accommodated in the second body, defines a pressure reducing chamber, and is configured to move in accordance with a pressure in the pressure reducing chamber so as to move the valve element. The first body is connected to an inner portion of a connection portion having a bottomed cylindrical shape. The connection portion is provided in the second bods to protrude outward. The valve seat is held between the first body and the second body in a direction in which the first body and the second body are attached to each other such that the valve seat is fixed in a flow passage.
    Type: Application
    Filed: November 2, 2017
    Publication date: May 17, 2018
    Applicants: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Akira NAKANO, Toshikatsu KUBO, Shota YAMAMATO, Akira YAMASHITA, Yutaka HOTTA, Eiji OKAWACHI
  • Patent number: 9948219
    Abstract: A rotating electrical machine control device where the changeover control circuit switches the source of electric power for the electronic control unit when the electric power that is supplied from the second DC power supply to the electronic control unit becomes equal to or lower than a predetermined first reference value and electric power that is output from the backup power supply is equal to or higher than a predetermined second reference value, and the electronic control unit uses the electric power supplied from the backup power supply to cause the inverter to perform the switching operation to perform fail-safe control.
    Type: Grant
    Filed: December 17, 2015
    Date of Patent: April 17, 2018
    Assignee: AISIN AW CO., LTD.
    Inventors: Subrata Saha, Yutaka Hotta, Yasushi Nakamura
  • Publication number: 20180087682
    Abstract: In a pressure reduction valve device, a valve body and a distal end portion of a support member are accommodated in a valve accommodation hole of a body. The distal end portion is inserted through an urging member accommodation hole. An inner introduction passage is formed between an outer peripheral surface of the distal end portion and an inner peripheral surface of the urging member accommodation hole. An outer introduction passage is formed between an outer surface of the valve body and an inner surface of the valve accommodation hole. The support member is provided with communication holes that establish communication between a gas inlet provided through the body and the valve accommodation hole in an axial direction. The inner introduction passage and the outer introduction passage are opposed, in an axial direction thereof, to the communication passage.
    Type: Application
    Filed: September 26, 2017
    Publication date: March 29, 2018
    Applicants: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Toshikatsu KUBO, Masayuki SEKINE, Akira NAKANO, Shota YAMAMOTO, Yutaka HOTTA, Akira YAMASHITA
  • Publication number: 20180047995
    Abstract: A fuel cell stack 100 includes a fuel cell stack 10, and an end plate 30 placed at an end of the fuel cell stack 10. The end plate 30 includes a metallic plate-like body 32, and a resin layer 60 formed on a surface 32b of the plate-like body 32. The plate-like body 32 includes flow holes 39 for a reactant gas and a cooling medium, and a stripe-shaped protrusion 38 protruding from the surface 32b and which divides the surface 32b into an inner area containing the flow holes 39 and an outer area outside the inner area. The protrusion 38 includes a vertical portion 38a protruding from the surface 32b, and a jutted portion 38b jutted from a distal end of the vertical portion 38a toward the inner area. The resin layer 60 is formed in the inner area to cover a surface 38as of the vertical portion 38a facing the inner area as well as at least part of the jutted portion 38b.
    Type: Application
    Filed: August 3, 2017
    Publication date: February 15, 2018
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, TOYODA GOSEI CO., LTD., TAIHO KOGYO CO., LTD.
    Inventors: Tatsuhiko SHIMIZU, Hitoshi HAMADA, Yutaka HOTTA, Tatsuya TOKUMASU, Tadanobu OTA, Yoshiki NAKAMURA
  • Publication number: 20170331400
    Abstract: A rotating electrical machine control device where the changeover control circuit switches the source of electric power for the electronic control unit when the electric power that is supplied from the second DC power supply to the electronic control unit becomes equal to or lower than a predetermined first reference value and electric power that is output from the backup power supply is equal to or higher than a predetermined second reference value, and the electronic control unit uses the electric power supplied from the backup power supply to cause the inverter o perform the switching operation to perform fail-safe control.
    Type: Application
    Filed: December 17, 2015
    Publication date: November 16, 2017
    Applicant: AISIN AW CO., LTD.
    Inventors: Subrata SAHA, Yutaka HOTTA, Yasushi NAKAMURA
  • Patent number: 9692064
    Abstract: A fuel cell system according to the present invention comprises a fuel gas supply system that supplies a fuel gas from a fuel supply source to a fuel cell that includes a stack including a plurality of cells, and a fuel off-gas circulation system that resupplies fuel off-gas to the stack. The fuel off-gas circulation system includes: a mixed fuel gas flow path formed such that a mixed fuel gas containing the fuel off-gas and the fuel gas flows in a direction along an inner surface of a manifold installed in the stack; and a point of merger where the fuel off-gas and the fuel gas merge with each other to produce the mixed fuel gas, the point of merger being arranged on one surface side of the manifold. With such configuration, the heat exchange efficiency of the fuel off-gas and the fuel gas can be increased, and ice resulting from water in the fuel off-gas can be prevented from flowing into the fuel cell stack.
    Type: Grant
    Filed: February 26, 2013
    Date of Patent: June 27, 2017
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yutaka Hotta, Michitaro Itoga
  • Patent number: 9469201
    Abstract: A vehicle equipment mounting structure that arranges a motor case, in which a rotary electric machine that drives a vehicle is housed, in an engine compartment, and that includes a PCU that controls the rotary electric machine, and an auxiliary battery that supplies electric power to the PCU. This structure includes a fixing portion that fixes the PCU onto the motor case, and a connecting portion that connects the auxiliary battery to a side member that absorbs an impact load by being crushed in a crushing direction. The connecting portion has a displaceable member that is displaceable in the crushing direction. The auxiliary battery is arranged on a vehicle front side of the PCU such that the PCU and the auxiliary battery partially overlap in the crushing direction. The auxiliary battery is arranged so as to be able to move past the PCU in response to an impact load.
    Type: Grant
    Filed: February 2, 2012
    Date of Patent: October 18, 2016
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTD.
    Inventors: Koji Hotta, Kenshi Yamanaka, Yutaka Hotta
  • Patent number: 9358870
    Abstract: The overall outer shape of a vehicle drive device including an inverter device is reduced in size. An input member and a rotating electrical machine are arranged side by side on a first axis, and a differential gear unit is placed on a second axis. An inverter device is located so as to overlap the differential gear unit as viewed in a radial direction, and is located between a second reference line that extends perpendicularly to a first reference line passing through the first axis and the second axis and that passes through the first axis and a third reference line that extends perpendicularly to the first reference line and that passes the second axis, as viewed in an axial direction.
    Type: Grant
    Filed: July 18, 2013
    Date of Patent: June 7, 2016
    Assignee: AISIN AW CO., LTD.
    Inventors: Yutaka Hotta, Tatsuyuki Uechi, Hiromichi Agata, Kazuo Aoki, Tatsuya Kondo, Manabu Miyazawa
  • Publication number: 20160141658
    Abstract: A gas-liquid separator includes a gas-liquid separator forming portion that is provided in an end plate, and a cover member. The gas-liquid separator forming portion includes a first inner wall portion that serves as a flow path for an off-gas and forms a part of an accumulating portion, the first inner wall portion having a shape recessed in a thickness direction of the end plate. The cover member includes a second inner wall portion that has a shape recessed in a thickness direction of the cover member, the second inner wall portion being disposed to face the first inner wall portion in a stack direction and forming the accumulating portion together with the first inner wall portion.
    Type: Application
    Filed: November 12, 2015
    Publication date: May 19, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yutaka HOTTA, Michitaro ITOGA, Tateki TAKAYAMA
  • Publication number: 20160141693
    Abstract: The gas liquid separator comprises a gas liquid separator-forming portion formed in an end plate of a fuel cell to have an opening at an end face of the end plate and that constitutes part of the gas liquid separator; and a cover member located to cover the opening and is combined with the gas liquid separator-forming portion to constitute the gas liquid separator. The gas liquid separator-forming portion includes a first inner wall portion provided to serve as a flow path of the off-gas and form part of a reservoir and that is configured to include an off-gas outlet, to be connected with the opening and to be formed concave in a thickness direction of the end plate; and a surrounding portion protruded from the first inner wall portion along a first direction from the gas liquid separator-forming portion toward the cover member to surround the off-gas outlet.
    Type: Application
    Filed: November 6, 2015
    Publication date: May 19, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yutaka HOTTA, Michitaro Itoga, Tateki Takayama