Patents by Inventor Hiromasa Nishioka

Hiromasa Nishioka 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: 20210283589
    Abstract: Provided is an exhaust gas purification device that ensures an improved purification performance and a suppressed pressure loss. An exhaust gas purification device of the present disclosure includes a honeycomb substrate and an inflow cell side catalyst layer. disposed on a surface on the inflow cell side in an inflow side region of the partition wall. When a gas permeability coefficient of an inflow side partition wall portion including the inflow side region of the partition wall and the inflow cell side catalyst layer is Ka and a gas permeability coefficient of an outflow side partition wall portion including an outflow side region at least from the predetermined position to an outflow side end of the partition wall is Kb, a ratio Ka/Kb of the gas permeability coefficients is within a range of 0.4 or more and 0.8 or less.
    Type: Application
    Filed: February 18, 2021
    Publication date: September 16, 2021
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATION
    Inventors: Koji SUGIURA, Hiromasa NISHIOKA, Naoto MIYOSHI, Akemi SATO, Ryota NAKASHIMA, Masatoshi IKEBE, Keisuke MURAWAKI, Hirotaka ORI
  • Publication number: 20210033009
    Abstract: An exhaust gas control apparatus includes: a honeycomb substrate including an inflow cell and an outflow cell adjacent to each other with a partition wall sandwiched between the inflow cell and the outflow cell; a first sealing part provided at an outflow side end of the inflow cell, and a second sealing part provided at an inflow side end of the outflow cell; and a catalyst layer provided on the partition wall, and at least one of the first sealing part and the second sealing part is an OSC material-containing sealing part containing an OSC material and a sealant, and a concentration of the OSC material in the OSC material-containing sealing part is uniform in an extending direction.
    Type: Application
    Filed: June 17, 2020
    Publication date: February 4, 2021
    Inventors: Koji SUGIURA, Hiromasa NISHIOKA, Naoto MIYOSHI, Akemi SATO, Masatoshi IKEBE, Ryota NAKASHIMA, Yasutaka NOMURA, Hirotaka ORI
  • Patent number: 10907523
    Abstract: An abnormality diagnosis apparatus includes an irradiation device to detect a resonance frequency by irradiating an electromagnetic wave to the NOx catalyst, and a controller to diagnose based on the resonance frequency whether the NOx catalyst is abnormal, wherein the NOx catalyst is arranged in such a position that an electric field strength inside the NOx catalyst at the time when the irradiation device irradiates the electromagnetic wave of the resonance frequency becomes larger in an upstream portion of the NOx catalyst, which is at the upstream side of a center of the NOx catalyst in the direction of flow of exhaust gas, than in a downstream portion of the NOx catalyst, which is at the downstream side of the center of the NOx catalyst.
    Type: Grant
    Filed: March 11, 2019
    Date of Patent: February 2, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tetsuya Sakuma, Keishi Takada, Hiromasa Nishioka
  • Patent number: 10900403
    Abstract: The NOx catalyst is irradiated with an electromagnetic wave, a resonance frequency and a ratio of a reception power to an oscillation power at the time of the irradiation are detected, and an upper limit value of a change amount of the resonance frequency or an upper limit value of a change amount of the ratio at which the NOx catalyst is diagnosed to be abnormal is determined from a change amount of the resonance frequency and a change amount of the ratio until water is adsorbed on all acid sites included in the NOx catalyst, and a change amount of the resonance frequency and a change amount of the ratio until ammonia is adsorbed on all acid sites included in the NOx catalyst, when it is supposed that the NOx catalyst is in a state of being on the borderline between normal and abnormal.
    Type: Grant
    Filed: March 15, 2019
    Date of Patent: January 26, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tetsuya Sakuma, Keishi Takada, Hiromasa Nishioka
  • Patent number: 10890092
    Abstract: An internal combustion engine may include an electronic control unit configured to supply additives to an exhaust gas cleaning catalyst having a temperature not more than a predetermined temperature. The electronic control unit may execute abnormality diagnosis of the exhaust gas cleaning catalyst based on an ability for cleaning exhaust gas of the exhaust gas cleaning catalyst. When preforming abnormality diagnosis of the exhaust gas cleaning catalyst having the temperature not more than the predetermined temperature, the electronic control unit may reduce the amount of the additives supplied to the exhaust gas cleaning catalyst to less than the amount supplied when abnormality diagnosis of the exhaust gas cleaning catalyst having the temperature not more than the predetermined temperature is not executed.
    Type: Grant
    Filed: February 9, 2018
    Date of Patent: January 12, 2021
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hirotaka Saitoh, Hiromasa Nishioka
  • Publication number: 20200368735
    Abstract: An exhaust gas purification device that allows suppressing an increase in pressure loss is provided. The exhaust gas purification device of the present disclosure includes a honeycomb substrate and an inflow cell side catalyst layer. The substrate includes a porous partition wall which defines inflow cells and outflow cells extending from an inflow side end to an outflow side end. The inflow cell side catalyst layer is disposed on a surface on the inflow cell side in an inflow cell side catalyst region from an inflow side end to a position close to an outflow side end of the partition wall. The permeability of a portion including an outflow side region from the position to the outflow side end of the partition wall is higher than a gas permeability of a portion including the inflow cell side catalyst region of the partition wall and the inflow cell side catalyst layer.
    Type: Application
    Filed: May 1, 2020
    Publication date: November 26, 2020
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATION
    Inventors: Koji SUGIURA, Hiromasa NISHIOKA, Naoto MIYOSHI, Akemi SATO, Masatoshi IKEBE, Ryota NAKASHIMA, Yasutaka NOMURA, Hirotaka ORI
  • Publication number: 20200332698
    Abstract: There is provided a structure including: a substrate including a first and a second ends, and a porous partition wall defining a first and a second cells extending between the first and the second ends; a first catalyst; and a second catalyst. In a first area, the first catalyst is disposed on a first surface of the partition wall, and the partition wall with the first catalyst disposed on the partition wall is impermeable to gas. In a second area, the first catalyst is not provided, the second catalyst is disposed in a region including at least a part inside the partition wall, the part facing the first cell, and the partition wall with the second catalyst disposed in the partition wall is permeable to gas. In a third area, any of the first catalyst or the second catalyst is not provided, and the partition wall is permeable to gas.
    Type: Application
    Filed: April 17, 2020
    Publication date: October 22, 2020
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATION
    Inventors: Koji Sugiura, Hiromasa NISHIOKA, Naoto MIYOSHI, Akemi SATO, Masatoshi IKEBE, Ryota NAKASHIMA, Yasutaka NOMURA
  • Publication number: 20200316578
    Abstract: There is provided a filter catalyst that has a wall-flow structure, and the filter catalyst has an excellent purification performance. The embodiment is a filter catalyst including a wall-flow type substrate that includes an inlet-side cell, an outlet-side cell, and a partition wall. The inlet-side cell has an open end portion on an exhaust gas flow-in side and a closed end portion on an exhaust gas flow-out side. The outlet-side cell is adjacent to the inlet-side cell and has an open end portion on the exhaust gas flow-out side and a closed end portion on the exhaust gas flow-in side. The partition wall has a porous structure and interposes between the inlet-side cell and the outlet-side cell. The filter catalyst includes an oxygen occlusion portion and a catalyst portion dispersed and disposed in the porous structure. The oxygen occlusion portion is disposed on a wall surface of the porous structure.
    Type: Application
    Filed: March 13, 2020
    Publication date: October 8, 2020
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATION
    Inventors: Naoto MIYOSHI, Koji SUGIURA, Hiromasa NISHIOKA, Akemi SATO, Masatoshi IKEBE, Ryota NAKASHIMA, Yasutaka NOMURA, Hirotaka ORI
  • Patent number: 10794250
    Abstract: An electrochemical reactor 70 is provided with a proton conductive solid electrolyte layer 75; an anode layer 76 arranged on the surface of the solid electrolyte layer and able to hold water molecules; a cathode layer 77 arranged on the surface of the solid electrolyte layer; and a current control device 73 controlling a current flowing through the anode layer and the cathode layer. The current control device reduces the current flowing through the anode layer and the cathode layer, when the water molecules held in the anode layer become smaller in amount.
    Type: Grant
    Filed: December 11, 2018
    Date of Patent: October 6, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tetsuya Sakuma, Keishi Takada, Hiromasa Nishioka
  • Patent number: 10731531
    Abstract: An internal combustion engine 1 is provided, in an exhaust passage thereof with an electrochemical reactor including: an ion conductive solid electrolyte layer; an anode layer arranged on a surface of the solid electrolyte layer; and a cathode layer arranged on a surface of the solid electrolyte layer and able to hold NOX. The engine includes a current control device for controlling the current supplied to the electrochemical reactor so as to flow from the anode layer through the solid electrolyte layer to the cathode layer. The current control device is configured so as to supply current to the electrochemical reactor at least temporarily while that internal combustion engine is stopped.
    Type: Grant
    Filed: April 30, 2019
    Date of Patent: August 4, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Keishi Takada, Tetsuya Sakuma, Hiromasa Nishioka, Hiroshi Otsuki, Hirohito Hirata, Yoshiyuki Sakamoto, Tsuyoshi Hamaguchi, Chika Kato, Yuji Sakakibara, Takashi Kuzuya
  • Patent number: 10641150
    Abstract: An exhaust treatment catalyst (5) is arranged in the engine exhaust passage, and hydrogen generated in the reformer (6) is supplied through the hydrogen supply pipe (13) to the inside of the engine exhaust passage upstream of the exhaust treatment catalyst (5). Heat exchange fins (15) for heat exchange with exhaust gas flowing through the inside of the engine exhaust passage are formed on the outer circumferential surface of the hydrogen supply pipe (13) inserted inside the engine exhaust passage.
    Type: Grant
    Filed: February 11, 2019
    Date of Patent: May 5, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yasumasa Notake, Hiromasa Nishioka, Keishi Takada, Tetsuya Sakuma, Kiyoshi Fujihara
  • Patent number: 10550779
    Abstract: An exhaust gas control apparatus includes a fuel injection device, a NOx occlusion reduction catalyst, a fuel addition valve, an inflow gas adjustment device, and an electronic control unit. The electronic control unit executes a low flow rate reduction treatment for removing NOx occluded in the NOx occlusion reduction catalyst after fuel supply from the fuel injection device is stopped. The electronic control unit controls the inflow gas adjustment device such that a ratio of oxygen to the fuel added to the NOx occlusion reduction catalyst at a time when a temperature of the NOx occlusion reduction catalyst is below an activation temperature becomes higher than a ratio of oxygen to the fuel added to the NOx occlusion reduction catalyst at a time when the temperature of the NOx occlusion reduction catalyst is equal to or higher than the activation temperature during the low flow rate reduction treatment.
    Type: Grant
    Filed: June 20, 2018
    Date of Patent: February 4, 2020
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kazuhiro Umemoto, Toshihiro Mori, Hiromasa Nishioka
  • Patent number: 10502115
    Abstract: In order to supply a reducing agent to an NOx catalyst in an appropriate manner when the temperature of the NOx catalyst is high, in cases where the temperature of the NOx catalyst is equal to or higher than a predetermined temperature at which ammonia is oxidized, and in cases where an NOx reduction rate in the NOx catalyst is smaller than a predetermined lower limit reduction rate, when the addition of the additive agent is carried out at least twice by changing an equivalent ratio with respect to an amount of NOx flowing into the NOx catalyst, the equivalent ratio in equivalent ratio control is made larger in the case where an amount of change of an amount of reduction of NOx accompanying a change of the equivalent ratio is larger than an amount of change of an amount of oxidation of ammonia accompanying the change of the equivalent ratio, than in the case where it is smaller than that.
    Type: Grant
    Filed: March 1, 2018
    Date of Patent: December 10, 2019
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Masataka Ogushi, Arifumi Matsumoto, Yoshihisa Tsukamoto, Hiromasa Nishioka
  • Patent number: 10494256
    Abstract: A burner combustion chamber (3), a reformer catalyst (4) to which burner combustion gas is fed, and a heat exchange part (13a) for heating the air fed to the burner (7) are provided. When the temperature of the reformer catalyst (4) exceeds the allowable catalyst temperature (TX) or when it is predicted the temperature of the reformer catalyst (4) will exceed the allowable catalyst temperature (TX), the air circulation route for guiding air to the burner (7) is switched from a high temperature air circulation route (13) for guiding air heated by the heat exchange part (13a) to the burner (7) to a low temperature air circulation route (14) for guiding air not flowing within the heat exchange part (13a) and lower in temperature than the air heated at the heat exchange part (13a) to the burner (7).
    Type: Grant
    Filed: June 28, 2017
    Date of Patent: December 3, 2019
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Shinichi Takeshima, Hiromasa Nishioka, Kiyoshi Fujiwara
  • Patent number: 10487712
    Abstract: An exhaust gas control system includes a NSR catalyst, a fuel supply valve, a SCR catalyst an addition device, and an electronic control unit. When temperature of NSR catalyst is in a range of a predetermined first temperature range and temperature of SCR catalyst is in a range of a predetermined second temperature range, the electronic control unit is configured to add additive with the addition device, and execute predetermined air-fuel ratio processing to control the air-fuel ratio of exhaust gas flowing into the NSR catalyst. In the predetermined air-fuel ratio processing, the electronic control unit is configured to execute a second air-fuel ratio processing after a first air-fuel ratio processing, and execute the third air-fuel ratio processing after a first air-fuel ratio processing and the second air-fuel ratio processing and in succession to the second air-fuel ratio processing.
    Type: Grant
    Filed: September 21, 2017
    Date of Patent: November 26, 2019
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yuriko Hagimoto, Yuji Miyoshi, Hiromasa Nishioka
  • Publication number: 20190345860
    Abstract: An internal combustion engine 1 is provided, in an exhaust passage thereof with an electrochemical reactor including: an ion conductive solid electrolyte layer; an anode layer arranged on a surface of the solid electrolyte layer; and a cathode layer arranged on a surface of the solid electrolyte layer and able to hold NOX. The engine includes a current control device for controlling the current supplied to the electrochemical reactor so as to flow from the anode layer through the solid electrolyte layer to the cathode layer. The current control device is configured so as to supply current to the electrochemical reactor at least temporarily while that internal combustion engine is stopped.
    Type: Application
    Filed: April 30, 2019
    Publication date: November 14, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Keishi TAKADA, Tetsuya SAKUMA, Hiromasa NISHIOKA, Hiroshi OTSUKI, Hirohito HIRATA, Yoshiyuki SAKAMOTO, Tsuyoshi HAMAGUCHI, Chika KATO, Yuji SAKAKIBARA, Takashi KUZUYA
  • Patent number: 10465579
    Abstract: When the temperature of an NSR catalyst belongs to a specified NSR temperature range and the temperature of an SCR catalyst belongs to a specified SCR temperature range, urea water is added, and specified air-fuel ratio processing relating to an air-fuel ratio of exhaust gas flowing into the NSR catalyst is executed. The specified air-fuel ratio processing includes i) a first air-fuel ratio processing to cause the air-fuel ratio of the exhaust gas flowing into the NSR catalyst to be a first lean air-fuel ratio that causes emission of occluded NOx from the NSR catalyst and ii) a second air-fuel ratio processing to cause the air-fuel ratio of the exhaust gas to be a second lean air-fuel ratio leaner than the first lean air-fuel ratio. In the specified air-fuel ratio processing, the first air-fuel ratio processing and the second air-fuel ratio processing are alternately repeated.
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: November 5, 2019
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yuriko Hagimoto, Yuji Miyoshi, Hiromasa Nishioka
  • Patent number: 10450923
    Abstract: An exhaust gas control apparatus for an internal combustion engine is provided. The exhaust gas control apparatus is equipped with a NOx reduction catalyst, a reducing agent tank, a reducing agent supply device, a booster, a heater, and an electronic control unit. The electronic control unit is configured to perform control of raising a temperature of a reducing agent to a first target temperature such that the reducing agent supplied by the reducing agent supply device is brought into a gas-liquid mixed state in an exhaust passage, when energy of exhaust gas is lower than a first threshold.
    Type: Grant
    Filed: November 9, 2017
    Date of Patent: October 22, 2019
    Assignees: Toyota Jidosha Kabushiki Kaisha, The Doshisha
    Inventors: Kazuhiro Umemoto, Toshihiro Mori, Hiromasa Nishioka, Jiro Senda, Eriko Matsumura
  • Publication number: 20190316505
    Abstract: An exhaust treatment catalyst (5) is arranged in the engine exhaust passage, and hydrogen generated in the reformer (6) is supplied through the hydrogen supply pipe (13) to the inside of the engine exhaust passage upstream of the exhaust treatment catalyst (5). Heat exchange fins (15) for heat exchange with exhaust gas flowing through the inside of the engine exhaust passage are formed on the outer circumferential surface of the hydrogen supply pipe (13) inserted inside the engine exhaust passage.
    Type: Application
    Filed: February 11, 2019
    Publication date: October 17, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yasumasa NOTAKE, Hiromasa NISHIOKA, Keishi TAKADA, Tetsuya SAKUMA, Kiyoshi FUJIHARA
  • Patent number: 10443468
    Abstract: The fuel addition system comprises: a fuel addition valve, a fuel tank, a first pressure storage chamber storing fuel to be supplied to a fuel injector, a supply pump increasing a pressure of fuel inside the fuel tank and supplying the fuel to the first pressure storage chamber, a pressure reduction valve discharging fuel stored in the first pressure storage chamber, a pressure reduction fuel passage supplying fuel discharged from the first pressure storage chamber to the fuel addition valve, and a control device controlling the fuel addition valve and the pressure reduction valve. The control device detects or estimates a temperature of fuel supplied to the fuel addition valve and, when injecting fuel from the fuel addition valve, controls an amount of fuel discharged from the first pressure storage chamber through the pressure reduction valve so that the temperature of the fuel becomes a reference temperature or more.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: October 15, 2019
    Assignees: Soken, Inc., Toyota Jidosha Kabushiki Kaisha
    Inventors: Tetsuro Serai, Kenichi Tomomatsu, Takayoshi Kojima, Naoki Toda, Kazuhiro Umemoto, Toshihiro Mori, Hiromasa Nishioka