Patents by Inventor Keishi Takada

Keishi Takada 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).

  • 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
  • Publication number: 20200232108
    Abstract: An electrochemical reactor includes a plurality of plate-shaped members and a plurality of passages defined by the plurality of plate-shaped members. Each plate-shaped member includes a cell including an ion conducting 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 at an opposite side to the surface at which the anode layer is arranged. The plate-shaped members are configured so that, for all of the passages, both of an anode layer of at least one plate-shaped member among the plurality of plate-shaped members defining the passages and a cathode layer of at least one other plate-shaped member among the plurality of plate-shaped members defining the passages face the passages.
    Type: Application
    Filed: January 22, 2020
    Publication date: July 23, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tetsuya SAKUMA, Keishi TAKADA, Yasumasa NOTAKE
  • Publication number: 20200224569
    Abstract: An exhaust purification system includes an electrochemical reactor provided in an engine exhaust passage; a bypass passage bypassing the electrochemical reactor; a flow control valve controlling an amount of exhaust gas, discharged from an engine body, flowing into the electrochemical reactor and the bypass passage; and a control device controlling the flow control valve. The electrochemical reactor includes a holding material holding NOX or HC and is configured so as to purify NOX or HC held at the holding material if encrgized. The control device controls the flow control valve so as to control the amount of exhaust gas flowing into the electrochemical reactor so that a temperature of the electrochemical reactor is maintained at less than a desorption start temperature where NOX or HC starts to be desorbed from the holding material.
    Type: Application
    Filed: January 14, 2020
    Publication date: July 16, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yasumasa NOTAKE, Keishi TAKADA, Tetsuya SAKUMA
  • Publication number: 20200215481
    Abstract: An electrochemical reactor is arranged inside an exhaust passage of an internal combustion engine and is provided with a plurality of groups of cells. Each group of cell has a plurality of cells, each cell has an ion conducting solid electrolyte layer, and an anode layer and cathode layer arranged on a surface of the solid electrolyte layer. Each group of cells is configured so that all of the exhaust gas flows into passages defined by cells configuring the group of cells and so that both of the anode layers and the cathode layers are exposed to each passage. The plurality of groups of cells are arranged aligned in a direction of flow of exhaust gas and different groups of cells are connected to a power source in parallel with each other.
    Type: Application
    Filed: December 31, 2019
    Publication date: July 9, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Keishi TAKADA, Tetsuya SAKUMA, Yasumasa NOTAKE
  • Publication number: 20200215482
    Abstract: An exhaust purification system of an internal combustion engine is provided with an electrochemical reactor provided in an exhaust passage of the internal combustion engine, and a voltage control device controlling a voltage supplied to the electrochemical reactor. The electrochemical reactor is provided with an ion conducting solid electrolyte layer and an anode layer and cathode layer placed on the surface of the solid electrolyte layer. The voltage control device is configured to perform short-circuit detection control detecting short-circuiting between the anode layer and the cathode layer, and energizing control applying current between the anode layer and the cathode layer so to energize the short-circuited part when short-circuiting is detected.
    Type: Application
    Filed: January 7, 2020
    Publication date: July 9, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tetsuya SAKUMA, Keishi TAKADA, Yasumasa NOTAKE
  • Patent number: 10655519
    Abstract: A vehicle includes a filter disposed in an exhaust passage through which exhaust gas discharged from an internal combustion engine passes, the filter being configured to collect PM that is particulate matter contained in the exhaust gas; a PM removal control device configured to start execution of PM removal control that heats the filter to remove the PM accumulated on the filter while the internal combustion engine is stopped; and a determination device configured to determine whether a user of the vehicle is away from the vehicle. The PM removal control device is configured to start the execution of the PM removal control only when the determination device determines that the user of the vehicle is away from the vehicle.
    Type: Grant
    Filed: December 18, 2017
    Date of Patent: May 19, 2020
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Edgar Yoshio Morales Teraoka, Katsuhiro Itou, Ryouhei Ohno, Akira Mikami, Keishi Takada, Masaaki Satou
  • 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: 10626778
    Abstract: When a user requests start-up of an internal combustion engine while PM removal control is in execution or immediately after execution of the PM removal control is completed, an electronic control unit informs the user of the vehicle of a first alarm, so that the user recognizes that the internal combustion engine cannot be started up immediately. This makes it possible to suppress the discomfort caused because the internal combustion engine is not started up.
    Type: Grant
    Filed: December 13, 2017
    Date of Patent: April 21, 2020
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Katsuhiro Ito, Akira Mikami, Masaaki Sato, Keishi Takada, Ryouhei Ono, Edgar Yoshio Morales Teraoka
  • Publication number: 20200063623
    Abstract: An internal combustion engine is provided with an engine body, a catalyst device provided in an exhaust passage of the engine body and having an exhaust purification catalyst with at least an oxidation function and a microwave absorber contained in a catalyst coat layer formed inside a substrate, and a microwave emitter for irradiating the catalyst device with microwaves. A control device for the internal combustion engine is configured so that if engine startup is requested when a temperature of the exhaust purification catalyst is less than a predetermined temperature, it makes the microwave emitter irradiate the catalyst device with microwaves and operates the engine body so that an air-fuel ratio of exhaust discharged from the engine body becomes a predetermined lean air-fuel ratio leaner than a stoichiometric air-fuel ratio.
    Type: Application
    Filed: July 10, 2019
    Publication date: February 27, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Keishi TAKADA
  • Publication number: 20190390869
    Abstract: A heat exchanger includes a prism-shaped heat exchange element, a plurality of frame members mounted to sides of the element in a one-to-one relationship, the sides extending along an axial direction of the heat exchange element, and cover members each covering an end face of the element, the end face being perpendicular to the axial direction of the heat exchange element. The frame members are connected to each of the cover members. Gaps for allowing movement of each of the frame members along a direction perpendicular to the axial direction of the heat exchange element are provided at each connecting portion at which the frame members are connected to the cover member. Thus, it is possible to move the frame members along with deformation of the heat exchange element.
    Type: Application
    Filed: February 19, 2016
    Publication date: December 26, 2019
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Ippei MOMOSE, Masaru TAKADA, Keishi TSUDA
  • Patent number: 10502106
    Abstract: An electrochemical reactor arranged in an exhaust passage of an internal combustion engine has a honeycomb member wherein a plurality of cells are formed. The honeycomb comprising an upstream and a downstream side partial honeycombs. The upstream side has a plurality of first and second cells arranged to at least partially adjoin the first cells through partition wall base members including an ion conductive solid electrolyte. The downstream side has a plurality of third and fourth cells arranged to at least partially adjoin the third cells through partition wall base members including an ion conductive solid electrolyte. The first and fourth cells have cathode layers, and second and third cells have anode layers. The electrochemical reactor is configured so all of the exhaust gas flowing through the first cells flows into the third cells and all of the exhaust gas flowing through the second cells flows into the fourth cells.
    Type: Grant
    Filed: May 15, 2019
    Date of Patent: December 10, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tetsuya Sakuma, Keishi Takada
  • Publication number: 20190368398
    Abstract: An electrochemical reactor arranged in an exhaust passage of an internal combustion engine has a honeycomb member wherein a plurality of cells are formed. The honeycomb comprising an upstream and a downstream side partial honeycombs. The upstream side has a plurality of first and second cells arranged to at least partially adjoin the first cells through partition wall base members including an ion conductive solid electrolyte. The downstream side has a plurality of third and fourth cells arranged to at least partially adjoin the third cells through partition wall base members including an ion conductive solid electrolyte. The first and fourth cells have cathode layers, and second and third cells have anode layers. The electrochemical reactor is configured so all of the exhaust gas flowing through the first cells flows into the third cells and all of the exhaust gas flowing through the second cells flows into the fourth cells.
    Type: Application
    Filed: May 15, 2019
    Publication date: December 5, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tetsuya SAKUMA, Keishi TAKADA
  • 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
  • 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
  • Publication number: 20190285308
    Abstract: A heat-exchanging ventilation device performs ventilation while exchanging heat between a supply airflow and a discharge airflow. The heat-exchanging ventilation device includes: a casing; a heat exchanger having a prism shape and accommodated in the casing to be insertable into and removable from the casing; a plurality of support members to support the heat exchanger in the casing; and a rotational force applying unit to apply a rotational force to the heat exchanger and rotate the heat exchanger. When a rotational force is applied to the heat exchanger in one direction by the rotational force applying unit, the heat exchanger is pressed against the support members, and when application of a rotational force in the one direction by the rotational force applying unit is stopped, the heat exchanger becomes rotatable in another direction.
    Type: Application
    Filed: February 19, 2016
    Publication date: September 19, 2019
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Keishi Tsuda, Masaru Takada, Ippei Momose, Akira Hayashi
  • Publication number: 20190284980
    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: Application
    Filed: March 15, 2019
    Publication date: September 19, 2019
    Inventors: Tetsuya SAKUMA, Keishi TAKADA, Hiromasa NISHIOKA
  • Publication number: 20190277181
    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: Application
    Filed: March 11, 2019
    Publication date: September 12, 2019
    Inventors: Tetsuya SAKUMA, Keishi TAKADA, Hiromasa NISHIOKA
  • Publication number: 20190249586
    Abstract: An abnormality diagnosis apparatus for an exhaust gas control apparatus. The abnormality diagnosis apparatus includes: an adsorption amount detector which detects an actual adsorption amount that is an amount of ammonia actually adsorbed in a catalyst; and an electronic control unit configured to: i) estimate an estimated adsorption amount that is an ammonia adsorption amount in the catalyst on an assumption that an ammonia supply apparatus is normal; and ii) execute an abnormality diagnosis in which the ammonia supply apparatus is diagnosed as being abnormal, in a case where the estimated adsorption amount is equal to or smaller than a predetermined adsorption amount and where a difference between the estimated adsorption amount and the actual adsorption amount is larger than a threshold.
    Type: Application
    Filed: February 13, 2019
    Publication date: August 15, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Keishi TAKADA, Tetsuya SAKUMA, Hiromasa NISHIOKA
  • Patent number: 10337376
    Abstract: An exhaust gas purification system comprises a first fuel supply unit to supply fuel to exhaust gas flowing in an exhaust passage by a supply valve arranged in the exhaust passage, and a second fuel supply unit to supply fuel to exhaust gas by adjusting a fuel injection condition, wherein in a temperature raising stage of the NOx SCR catalyst associated with the exhaust gas temperature raising processing, first control is performed in which fuel is supplied by the first fuel supply unit, and in a temperature holding stage of the NOx SCR catalyst associated with the exhaust gas temperature raising processing, at least second control is performed in which the ratio of an amount of fuel supply by the second fuel supply unit with respect to an amount of fuel supply by the first fuel supply unit becomes higher in comparison with that when performing the first control.
    Type: Grant
    Filed: December 15, 2015
    Date of Patent: July 2, 2019
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Akira Mikami, Shigeki Nakayama, Keishi Takada, Nobumoto Ohashi, Junichi Matsuo
  • Publication number: 20190195105
    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: Application
    Filed: December 11, 2018
    Publication date: June 27, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tetsuya SAKUMA, Keishi TAKADA, Hiromasa NISHIOKA