Patents by Inventor Takumi TOJO

Takumi TOJO 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: 20240390853
    Abstract: Provided is an exhaust gas purification device having a high warm-up performance and a high NOx conversion performance. The exhaust gas purification device includes a substrate having an upstream end and a downstream end, a first catalyst layer disposed on the substrate in a first region extending between the downstream end and a first position and containing rhodium, a second catalyst layer disposed on the substrate in a second region extending between the upstream end and a second position and containing rhodium and an oxygen storage material, and a third catalyst layer disposed on the second catalyst layer in a third region extending between the upstream end and a third position and containing palladium. The oxygen storage material in the second catalyst layer contains a pyrochlore type Ce—Zr composite oxide and a fluorite type Ce—Zr composite oxide at a weight ratio of from 0.2:1 to 0.4:1.
    Type: Application
    Filed: May 13, 2024
    Publication date: November 28, 2024
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATION
    Inventors: Takumi TOJO, Takahiro NISHIO, Nobuyuki TAKAGI, Sho HOSHINO, Yosuke TODA, Shun SAKAMOTO, Kengo SHIMIZU, Naoto FUJITA
  • Patent number: 12031465
    Abstract: An exhaust gas purification device includes a substrate including an upstream end and a downstream end, the substrate having a length Ls between the upstream end and the downstream end; a first catalyst layer containing first catalyst particles, extending across a first region, and being in contact with the substrate, the first region extending between the upstream end and a first position, the first position being at a first distance La from the upstream end toward the downstream end; and a second catalyst layer containing second catalyst particles, extending across a second region, and being in contact with the substrate, the second region extending between the downstream end and a second position, the second position being at a second distance Lb from the downstream end toward the upstream end. The first catalyst layer has an inner surface defining macropores.
    Type: Grant
    Filed: September 28, 2021
    Date of Patent: July 9, 2024
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATION
    Inventors: Isao Chinzei, Takumi Tojo, Masahide Miura, Nobusuke Kabashima, Minoru Ito, Naoto Fujita
  • Publication number: 20240139716
    Abstract: Provided is an exhaust gas purification catalyst providing a catalyst performance and an OSC performance at the same time even at low temperature. The present disclosure relates to an exhaust gas purification catalyst including a substrate and a catalyst coating layer coated on the substrate. The catalyst coating layer includes a first catalyst coating layer containing Pd and/or Pt and a second catalyst coating layer containing Rh. The first catalyst coating layer is formed from an end portion in an upstream side with respect to an exhaust gas flow direction in the exhaust gas purification catalyst. The second catalyst coating layer includes an upstream coating layer and a downstream coating layer. Rh in the upstream coating layer and the downstream coating layer are supported on specific carrier particles. Further, a particle diameter of Rh is controlled.
    Type: Application
    Filed: October 17, 2023
    Publication date: May 2, 2024
    Applicants: Toyota Jidosha Kabushiki Kaisha, Cataler Corporation
    Inventors: Takahiro NISHIO, Nobuyuki Takagl, Takumi Tojo, Shogo Shirakawa, Kengo Shimizu, Sho Hoshino, Shun Sakamoto, Yosuke Toda
  • Publication number: 20230405569
    Abstract: Provided is an exhaust gas purification catalyst having a catalyst performance and an OSC performance in a compatible manner in an air-fuel ratio (A/F) rich atmosphere where HC poisoning is likely to occur. The exhaust gas purification catalyst includes a substrate and a catalyst coating layer coated on the substrate. The catalyst coating layer includes a first catalyst coating layer containing Pd and/or Pt as a catalyst metal and a second catalyst coating layer containing Rh as a catalyst metal. The first catalyst coating layer is formed from an end portion in an upstream side with respect to an exhaust gas flow direction in the exhaust gas purification catalyst. The second catalyst coating layer includes a high specific surface area OSC material having a specific surface area of more than 40 m2/g, a medium specific surface area OSC material having a specific surface area of 4 m2/g to 40 m2/g, and a low specific surface area OSC material having a specific surface area of less than 4 m2/g.
    Type: Application
    Filed: June 19, 2023
    Publication date: December 21, 2023
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATION
    Inventors: Takahiro NISHIO, Shogo SHIRAKAWA, Takumi TOJO, Nobuyuki TAKAGI, Yosuke TODA, Sho HOSHINO, Shun SAKAMOTO
  • Patent number: 11801492
    Abstract: The present disclosure provides an exhaust gas purification catalyst improved in OSC performance while maintaining an exhaust gas purification performance, which comprises a substrate and at least one catalyst layer formed on the substrate, wherein an uppermost catalyst layer contains a catalyst metal, a first OSC material having a pyrochlore structure, and a second OSC material having a higher oxygen storage/release rate than the first OSC material, wherein the uppermost catalyst layer consists of an upstream catalyst layer and a downstream catalyst layer, and wherein a proportion of a mass of the second OSC material based on a total mass of the first OSC material and the second OSC material is in a specific range in each of the upstream catalyst layer and the downstream catalyst layer.
    Type: Grant
    Filed: June 29, 2022
    Date of Patent: October 31, 2023
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Isao Chinzei, Takahiro Nishio, Takumi Tojo, Yoshiteru Yazawa
  • Publication number: 20230304694
    Abstract: A ventilation system according to a certain aspect includes: a ventilator that ventilates a first space; an air conveyor that is installed on a ceiling surface of the first space and conveys air from the first space to a second space different from the first space; a controller that controls an operation of the ventilator and an operation of the air conveyor; a first temperature measurer that measures an air temperature of the first space; and a second temperature measurer that measures an air temperature of the second space. The controller includes a determiner that determines whether the air conveyance by the air conveyor is possible or impossible on the basis of an air temperature of the first space and an air temperature of the second space.
    Type: Application
    Filed: July 1, 2021
    Publication date: September 28, 2023
    Inventors: Shinya HATTORI, Kunio KIYOMOTO, Tomoyuki HIGUCHI, Takumi TOJO, Naoto MASAMURA, Toru SASAI, Susumu URUSHIHARA, Kaori TASATO
  • Patent number: 11759769
    Abstract: Provided is an exhaust gas purification device that allows improving an exhaust gas purification performance. An exhaust gas purification device of the present disclosure includes a substrate and a catalyst layer disposed on the substrate. The catalyst layer contains a porous carrier, a catalytic metal that is supported by the porous carrier and belongs to platinum group, an alkaline earth metal supported by the porous carrier, and an alkaline earth metal not supported by the porous carrier. At least a part of the alkaline earth metal supported by the porous carrier is supported inside the porous carrier.
    Type: Grant
    Filed: October 7, 2021
    Date of Patent: September 19, 2023
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATION
    Inventors: Isao Chinzei, Seiji Nakahigashi, Takumi Tojo, Masahide Miura, Nobuyuki Takagi, Yoshiteru Yazawa, Sho Hoshino, Minoru Ito, Naoto Fujita, Tomomasa Aikawa
  • Patent number: 11725556
    Abstract: Provided is an exhaust gas purification catalyst having an improved catalyst performance while securing an OSC in an air-fuel ratio (A/F) rich atmosphere where HC poisoning is likely to occur. The present disclosure relates to an exhaust gas purification catalyst including a substrate and a catalyst coating layer coated on the substrate. The catalyst coating layer has an upstream coat layer formed from an end portion in an upstream side with respect to an exhaust gas flow direction in the exhaust gas purification catalyst and a downstream coat layer formed from an end portion in a downstream side with respect to the exhaust gas flow direction in the exhaust gas purification catalyst. The downstream coat layer includes Rh as a catalytic metal, alumina-ceria-zirconia complex oxide, and alkaline earth metal.
    Type: Grant
    Filed: February 28, 2022
    Date of Patent: August 15, 2023
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATION
    Inventors: Isao Chinzei, Takumi Tojo, Takahiro Nishio, Yosuke Toda, Hirotaka Ori, Minoru Ito, Sho Hoshino
  • Patent number: 11618009
    Abstract: The present invention relates to a honeycomb catalytic converter, including: a honeycomb structured body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween; and Pd and Rh supported on the partition walls of the honeycomb structured body, wherein the honeycomb structured body is an extrudate containing a ceria-zirconia complex oxide and alumina, a Pd-carrying region where only Pd is supported is formed on the partition walls within a predetermined width from one end of the honeycomb structured body, and a Rh-carrying region where only Rh is supported is formed on the partition walls within a predetermined width from the other end of the honeycomb structured body, and the Pd-carrying region extends to at least 50% of the length of the honeycomb structured body, and the Rh-carrying region extends to at least 20% of the length of the honeycomb structured body.
    Type: Grant
    Filed: March 26, 2020
    Date of Patent: April 4, 2023
    Assignees: IBIDEN CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Shinnosuke Goto, Takumi Tojo, Takeru Yoshida, Hiromasa Suzuki
  • Publication number: 20230016121
    Abstract: The present disclosure provides an exhaust gas purification catalyst improved in OSC performance while maintaining an exhaust gas purification performance, which comprises a substrate and at least one catalyst layer formed on the substrate, wherein an uppermost catalyst layer contains a catalyst metal, a first OSC material having a pyrochlore structure, and a second OSC material having a higher oxygen storage/release rate than the first OSC material, wherein the uppermost catalyst layer consists of an upstream catalyst layer and a downstream catalyst layer, and wherein a proportion of a mass of the second OSC material based on a total mass of the first OSC material and the second OSC material is in a specific range in each of the upstream catalyst layer and the downstream catalyst layer.
    Type: Application
    Filed: June 29, 2022
    Publication date: January 19, 2023
    Inventors: Isao CHINZEI, Takahiro NISHIO, Takumi TOJO, Yoshiteru YAZAWA
  • Patent number: 11511458
    Abstract: The present invention provides a method of producing a honeycomb structured body having excellent mechanical strength.
    Type: Grant
    Filed: September 11, 2019
    Date of Patent: November 29, 2022
    Assignees: IBIDEN CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Shinnosuke Goto, Takeru Yoshida, Hiromasa Suzuki, Masaru Kakinohana, Takumi Tojo
  • Patent number: 11511459
    Abstract: The present invention provides a method of producing a honeycomb structured body having excellent mechanical strength.
    Type: Grant
    Filed: September 11, 2019
    Date of Patent: November 29, 2022
    Assignees: IBIDEN CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Shinnosuke Goto, Masaru Kakinohana, Takeru Yoshida, Hiromasa Suzuki, Takumi Tojo
  • Patent number: 11504704
    Abstract: An exhaust gas purification device includes a substrate including an upstream end and a downstream end and having a length Ls; a first containing Pd particles, extending between the upstream end and a first position, and being in contact with the substrate; a second containing Rh particles, extending between the downstream end and a second position, and being in contact with the substrate; and a third catalyst layer containing Rh particles, extending between the upstream end and a third position, and being in contact with at least the first catalyst layer, wherein an average of a Rh particle size distribution is from 1.0 to 2.0 nm, and a standard deviation of the Rh particle size distribution is 0.8 nm or less in each of the second catalyst layer and the third catalyst layer.
    Type: Grant
    Filed: August 24, 2021
    Date of Patent: November 22, 2022
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATION
    Inventors: Isao Chinzei, Takumi Tojo, Shogo Shirakawa, Sho Hoshino, Minoru Ito, Naoto Fujita
  • Publication number: 20220298942
    Abstract: Provided is an exhaust gas purification catalyst having an improved catalyst performance while securing an OSC in an air-fuel ratio (A/F) rich atmosphere where HC poisoning is likely to occur. The present disclosure relates to an exhaust gas purification catalyst including a substrate and a catalyst coating layer coated on the substrate. The catalyst coating layer has an upstream coat layer formed from an end portion in an upstream side with respect to an exhaust gas flow direction in the exhaust gas purification catalyst and a downstream coat layer formed from an end portion in a downstream side with respect to the exhaust gas flow direction in the exhaust gas purification catalyst. The downstream coat layer includes Rh as a catalytic metal, alumina-ceria-zirconia complex oxide, and alkaline earth metal.
    Type: Application
    Filed: February 28, 2022
    Publication date: September 22, 2022
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATION
    Inventors: Isao CHINZEI, Takumi TOJO, Takahiro NISHIO, Yosuke TODA, Hirotaka ORI, Minoru ITO, Sho HOSHINO
  • Publication number: 20220118428
    Abstract: Provided is an exhaust gas purification device that allows improving an exhaust gas purification performance. An exhaust gas purification device of the present disclosure includes a substrate and a catalyst layer disposed on the substrate. The catalyst layer contains a porous carrier, a catalytic metal that is supported by the porous carrier and belongs to platinum group, an alkaline earth metal supported by the porous carrier, and an alkaline earth metal not supported by the porous carrier. At least a part of the alkaline earth metal supported by the porous carrier is supported inside the porous carrier.
    Type: Application
    Filed: October 7, 2021
    Publication date: April 21, 2022
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATION
    Inventors: Isao Chinzei, Seiji NAKAHIGASHI, Takumi TOJO, Masahide MIURA, Noboyuki TAKAGI, Yoshiteru YAZAWA, Sho HOSHINO, Minoru ITO, Naoto FUJITA, Tomomasa AIKAWA
  • Patent number: 11298685
    Abstract: The present invention provides a honeycomb catalytic converter including: a honeycomb structured body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween; and a noble metal supported on the honeycomb structured body, wherein the honeycomb structured body contains a ceria-zirconia composite oxide and alumina, and cerium on a surface of each partition wall has a lower concentration than cerium in a central portion of the partition wall in a thickness direction.
    Type: Grant
    Filed: March 26, 2020
    Date of Patent: April 12, 2022
    Assignees: IBIDEN CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Shinnosuke Goto, Takumi Tojo, Takeru Yoshida, Hiromasa Suzuki
  • Patent number: 11298686
    Abstract: The present invention relates to a honeycomb catalytic converter including: a honeycomb structured body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween; and a noble metal supported on the honeycomb structured body, wherein the honeycomb structured body contains a ceria-zirconia complex oxide and alumina, each partition wall includes a first carrier layer defining a surface layer of the partition wall and carrying Pd, and a second carrier layer located more inwardly of the partition wall than the first carrier layer and carrying Rh.
    Type: Grant
    Filed: March 26, 2020
    Date of Patent: April 12, 2022
    Assignees: IBIDEN CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Shinnosuke Goto, Takeru Yoshida, Takumi Tojo, Hiromasa Suzuki
  • Patent number: 11298687
    Abstract: The present invention relates to a honeycomb catalytic converter including: a honeycomb structured body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween; a noble metal supported on the honeycomb structured body; and an inlet-side end face and on outlet-side end face, wherein each partition wall includes a substrate portion in the form of an extrudate containing a ceria-zirconia complex oxide and alumina, and a coat layer formed on a surface of the substrate portion and containing the noble metal, and the inlet-side end face has a higher aperture ratio than the outlet-side end face.
    Type: Grant
    Filed: March 26, 2020
    Date of Patent: April 12, 2022
    Assignees: IBIDEN CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Shinnosuke Goto, Takumi Tojo, Takeru Yoshida, Hiromasa Suzuki
  • Publication number: 20220106900
    Abstract: An exhaust gas purification device includes a substrate including an upstream end and a downstream end, the substrate having a length Ls between the upstream end and the downstream end; a first catalyst layer containing first catalyst particles, extending across a first region, and being in contact with the substrate, the first region extending between the upstream end and a first position, the first position being at a first distance La from the upstream end toward the downstream end; and a second catalyst layer containing second catalyst particles, extending across a second region, and being in contact with the substrate, the second region extending between the downstream end and a second position, the second position being at a second distance Lb from the downstream end toward the upstream end. The first catalyst layer has an inner surface defining macropores.
    Type: Application
    Filed: September 28, 2021
    Publication date: April 7, 2022
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATION
    Inventors: Isao CHINZEI, Takumi TOJO, Masahide MIURA, Nobusuke KABASHIMA, Minoru ITO, Naoto FUJITA
  • Publication number: 20220062884
    Abstract: An exhaust gas purification device includes a substrate including an upstream end and a downstream end and having a length Ls; a first containing Pd particles, extending between the upstream end and a first position, and being in contact with the substrate; a second containing Rh particles, extending between the downstream end and a second position, and being in contact with the substrate; and a third catalyst layer containing Rh particles, extending between the upstream end and a third position, and being in contact with at least the first catalyst layer, wherein an average of a Rh particle size distribution is from 1.0 to 2.0 nm, and a standard deviation of the Rh particle size distribution is 0.8 nm or less in each of the second catalyst layer and the third catalyst layer.
    Type: Application
    Filed: August 24, 2021
    Publication date: March 3, 2022
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATION
    Inventors: Isao CHINZEI, Takumi TOJO, Shogo SHIRAKAWA, Sho HOSHINO, Minoru ITO, Naoto FUJITA