Patents by Inventor Takehito Kimata

Takehito Kimata 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: 20210381945
    Abstract: A sensor device includes a housing that has a sensor element inserted therein and holds the sensor element such that a detection unit is positioned at the tip end thereof in the axial direction, and an element cover disposed coaxially with the tip end. A tip surface of the outer cover has a plurality of outer tip surface holes provided outward from positions opposing the outer periphery of an inner tip surface hole. The tip surface of the outer cover includes a central portion which protrudes towards the inner tip surface hole, an outer peripheral portion in which the outer tip surface holes are formed and which is positioned farther toward the tip end than is the central portion, and an inclined surface connects the central portion to the outer tip surface holes.
    Type: Application
    Filed: August 20, 2021
    Publication date: December 9, 2021
    Inventors: Yuto TAMEI, Koichi YOSHIDA, Takehito KIMATA
  • Publication number: 20210310972
    Abstract: A particulate-matter detecting sensor including an insulating substrate which has a detecting face, a plurality of detecting conductors formed in the insulating substrate, and a heating section embedded in the insulating substrate. Each of the plurality of detecting conductors includes a detecting electrode part, a terminal part, and a connecting part. An exposed conductor part of the detecting conductor which is exposed to the element surface is constituted of a noble metal conductor mainly formed of at least one noble metal selected from Pt, Au, Pd, Rh and Ir. At least a portion of a non-exposed conductor part of the detecting conductor which is not exposed to the element surface is constituted of a low expansion conductor mainly formed of a low expansion coefficient metal which linear expansion coefficient is lower than that of the noble metal.
    Type: Application
    Filed: August 9, 2019
    Publication date: October 7, 2021
    Applicants: IBIDEN CO., LTD., DENSO CORPORATION
    Inventors: Yasutaka ITO, Tomoyoshi NAKAMURA, Takeshi USHIDA, Takehito KIMATA, Masahiro YAMAMOTO
  • Publication number: 20210199611
    Abstract: A particulate-matter detecting sensor including an insulating substrate which has a detecting face, detecting conductors formed in the insulating substrate, and a heating section formed on the insulating substrate. Each detecting conductor includes a detecting electrode part, a terminal part, and a connecting part. A portion of the detecting conductor is constituted of a noble metal conductor mainly formed of at least one noble metal selected from Pt, Au, Pd, Rh and Ir. At least a portion of the connecting part is formed of a low expansion conductor mainly formed of a low expansion coefficient metal having linear expansion coefficient lower than that of the noble metal. Both conductors are joined at an overlapping part at which the noble metal conductor and the low expansion conductor are partly overlapped with each other on an insulating layer forming the insulating substrate in a normal line direction of the insulating layer.
    Type: Application
    Filed: August 9, 2019
    Publication date: July 1, 2021
    Applicants: IBIDEN CO., LTD., DENSO CORPORATION
    Inventors: Yasutaka ITO, Tomoyoshi NAKAMURA, Takeshi USHIDA, Takehito KIMATA, Masahiro YAMAMOTO
  • Patent number: 11035821
    Abstract: A gas concentration detection apparatus is provided with a measuring gas chamber, a solid electrolyte body, a pump cell, a sensor cell, a pump cell controller and a sensor cell detection section. The pump cell controller applies an elimination voltage to the pump cell at a start-up point, before a gas concentration is detected. The water in the measuring gas chamber is decomposed and hydrogen is generated by application of the elimination voltage. Oxygen occluded in a sensor electrode of the sensor cell is removed by the hydrogen.
    Type: Grant
    Filed: October 1, 2015
    Date of Patent: June 15, 2021
    Assignee: DENSO CORPORATION
    Inventors: Yuusuke Toudou, Takehito Kimata, Yuusuke Kawamoto
  • Patent number: 10996192
    Abstract: A gas sensor is equipped with a sensor element which detects a specific gas concentration within a gas that is being measured, a housing having the sensor element disposed in the interior thereof and retained therein, and an element cover disposed at an axial-direction tip end of the housing. The tip of the sensor element is provided with a gas introduction part. The element cover has an inner cover and an outer cover, with a space opened between the inner cover and outer cover. Inner side flow holes provided in the inner cover are disposed closer to an axial-direction base end than is a tapered-diameter step part. The distance between the tip of the sensor element and the inner-side flow holes of the inner cover, with respect to an axial direction, is less than or equal to 1.6 mm.
    Type: Grant
    Filed: September 9, 2016
    Date of Patent: May 4, 2021
    Assignee: DENSO CORPORATION
    Inventors: Takashi Araki, Takehito Kimata, Mitsunobu Nakatou
  • Patent number: 10866210
    Abstract: A gas sensor is equipped with a solid electrolyte body, a pump electrode, a sensor electrode, and a heater. In the gas sensor, a region of the whole of a front end portion of a heater base in which a heating element is disposed is broken down into three regions: an intermediate region defined between a front end and a base end of the sensor electrode, a front end region located closer to a front end side than the intermediate region is, and a base end region located closer to a base end side than the intermediate region is. A resistance value per unit area of a heating element lying in the base end region and a resistance value per unit area of the heating element lying in the front end region is selected to be higher than that of the heating element lying in the intermediate region, thereby keeping the temperature of a region around the sensor electrode at a desired level even when the temperature of gas changes.
    Type: Grant
    Filed: February 12, 2016
    Date of Patent: December 15, 2020
    Assignee: DENSO CORPORATION
    Inventors: Takehito Kimata, Yuusuke Toudou, Yuusuke Kawamoto
  • Publication number: 20200292421
    Abstract: A sensor device is equipped with a housing having an element cover retaining a sensor element such that a detection section of the sensor element is positioned at the tip end of the sensor element. The element cover includes an inner cover provided with inner side holes and an inner tip face hole respectively provided therein, and an outer cover provided with outer side holes in a side thereof, with the tip position of the outer side holes located closer to the tip end than is the tip position of the inner cover. Between the outer surface of the inner cover and the inner surface of the outer cover there is a large clearance section at the tip end and a small clearance section at the base end, providing a flow path that is shaped for connecting the large clearance section and the small clearance section without a step.
    Type: Application
    Filed: May 28, 2020
    Publication date: September 17, 2020
    Inventors: Yuto TAMEI, Hirofumi NODA, Takehito KIMATA, Takashi ARAKI
  • Publication number: 20200292422
    Abstract: A sensor device includes an element cover at the tip end of a housing, retaining a sensor element. An outer cover is provided with outer side holes, with the tip position of the outer side holes being farther toward the tip end than is the tip position of an inner cover, and a first flow passage having a gas flow direction that is at right angles to the axial direction is formed at the inner side of the outer cover. An inner side hole in the inner cover is open to a second flow passage provided between the side surfaces of the inner cover and the outer cover, and a detection surface of the sensor element is located on an extension line in an extension direction of a guide member which extends obliquely into the interior of the inner cover from the tip-position edge of the inner side hole.
    Type: Application
    Filed: May 28, 2020
    Publication date: September 17, 2020
    Inventors: Yuto TAMEI, Takashi ARAKI, Hirofumi NODA, Takehito KIMATA, Koichi YOSHIDA
  • Patent number: 10557815
    Abstract: A sensor element which has a pair of positive and negative detection electrodes disposed on a surface of an insulation body as a detecting portion and a cover body configured to cover an opening of a cylindrical housing. The cover body is provided with gas inlet and outlet holes via which the measuring gas is introduced and discharged. The pair of detection electrodes have a plurality of wire electrodes. The wire electrodes electrically connected to the positive electrode and the wire electrodes electrically connected to the negative electrode are alternately arranged in parallel. Any one of a first insulation layer which is a narrow electrode interval Dn and a second insulation layer which is a wide electrode interval Dw, arranged between adjacent wire electrodes, and the first insulation layer arranged in a center part of the detecting portion.
    Type: Grant
    Filed: September 14, 2016
    Date of Patent: February 11, 2020
    Assignee: DENSO CORPORATION
    Inventors: Masahiro Yamamoto, Masayuki Tamura, Go Miyagawa, Toru Katafuchi, Takehito Kimata, Yuto Tamei
  • Patent number: 10309923
    Abstract: A gas sensor device is equipped with the sensor cell, the pump cell, the inner void space, and the gas inlet. The sensor cell is created by a portion of the solid electrolyte body and a pair of sensor electrodes disposed on the solid electrolyte body. The pump cell is created by a portion of the solid electrolyte body and a pair of pump electrodes disposed on the solid electrolyte body. The inner void space faces the sensor electrode and the pump electrode. If a dimension of said gas inlet in a direction in which the measurement gas flows in the gas inlet is defined as L1, a sectional area of the gas inlet taken perpendicular to the direction of flow of the measurement gas in the gas inlet is defined as S1, a distance between the gas inlet and the sensor cell is defined as L2, and a sectional area of the inner void space taken perpendicular to a direction in which the pump cell and the sensor cell are aligned with each other is defined as S2, a relation of 1000?(L1/S1)×(L2/S2)?5000 is met.
    Type: Grant
    Filed: July 8, 2015
    Date of Patent: June 4, 2019
    Assignee: DENSO CORPORATION
    Inventors: Yuusuke Toudou, Takehito Kimata, Mitsunobu Nakatou
  • Patent number: 10190517
    Abstract: An exhaust gas purifying apparatus for an internal combustion engine, in which a NOx absorbing catalyst and a NOx concentration sensor for detecting a NOx concentration in exhaust gases of the engine, are provided in an exhaust passage of the engine. A rich spike for temporarily enriching the air-fuel ratio is performed, and an execution timing of the rich spike is determined based on a detected output from the NOx concentration sensor. Performing the rich spike is determined to be unnecessary during a reducing state period from the time the rich spike ends to the time a preset time period has elapsed, and is also determined to be unnecessary when a change tendency of the detected output is determined to be an output decreasing state where the detected output is decreasing.
    Type: Grant
    Filed: October 26, 2016
    Date of Patent: January 29, 2019
    Assignees: Honda Motor Co., Ltd., Denso Corporation
    Inventors: Tatsuya Uchimoto, Ken Ogawa, Hiroshi Amaike, Shinichi Okunishi, Takehito Kimata, Takao Mishima
  • Patent number: 10113992
    Abstract: A gas concentration measuring apparatus is provided which works to calculate the concentration of a given gas component with enhanced accuracy. The gas concentration measuring apparatus 1 includes, a gas sensor 10 and a calculating portion 11. The gas sensor 10 is equipped with a pump cell 3, a monitor cell 4, and a sensor cell 5. The calculating portion 11 subtracts a monitor cell current Im that is a current flowing through the monitor cell 4 from a sensor cell current Is that is a current flowing through the sensor cell 5 to calculate the concentration of the given gas component in gas g. When calculating the concentration of the given gas component, the calculating portion 11 performs a correction operation to bring a value of the monitor cell current Im close to a value of an oxygen dependent current Iso that is a component of the sensor cell current Is which arises from the concentration of oxygen.
    Type: Grant
    Filed: April 6, 2018
    Date of Patent: October 30, 2018
    Assignee: DENSO CORPORATION
    Inventors: Yuusuke Toudou, Takehito Kimata, Toru Katafuchi
  • Publication number: 20180266936
    Abstract: A sensor element which has a pair of positive and negative detection electrodes disposed on a surface of an insulation body as a detecting portion and a cover body configured to cover an opening of a cylindrical housing. The cover body is provided with gas inlet and outlet holes via which the measuring gas is introduced and discharged. The pair of detection electrodes have a plurality of wire electrodes. The wire electrodes electrically connected to the positive electrode and the wire electrodes electrically connected to the negative electrode are alternately arranged in parallel. Any one of a first insulation layer which is a narrow electrode interval Dn and a second insulation layer which is a wide electrode interval Dw, arranged between adjacent wire electrodes, and the first insulation layer arranged in a center part of the detecting portion.
    Type: Application
    Filed: September 14, 2016
    Publication date: September 20, 2018
    Applicant: Denso Corporation
    Inventors: Masahiro YAMAMOTO, Masayuki TAMURA, Go MIYAGAWA, Toru KATAFUCHI, Takehito KIMATA, Yuto TAMEI
  • Patent number: 10073053
    Abstract: A gas concentration measuring apparatus is provided which works to calculate the concentration of a given gas component with enhanced accuracy. The gas concentration measuring apparatus 1 includes, a gas sensor 10 and a calculating portion 11. The gas sensor 10 is equipped with a pump cell 3, a monitor cell 4, and a sensor cell 5. The calculating portion 11 subtracts a monitor cell current Im that is a current flowing through the monitor cell 4 from a sensor cell current Is that is a current flowing through the sensor cell 5 to calculate the concentration of the given gas component in gas g. When calculating the concentration of the given gas component, the calculating portion 11 performs a correction operation to bring a value of the monitor cell current Im close to a value of an oxygen dependent current Iso that is a component of the sensor cell current Is which arises from the concentration of oxygen.
    Type: Grant
    Filed: August 29, 2014
    Date of Patent: September 11, 2018
    Assignee: DENSO CORPORATION
    Inventors: Yuusuke Toudou, Takehito Kimata, Toru Katafuchi
  • Publication number: 20180252671
    Abstract: A gas sensor is equipped with a sensor element which detects a specific gas concentration within a gas that is being measured, a housing having the sensor element disposed in the interior thereof and retained therein, and an element cover disposed at an axial-direction tip end of the housing. The tip of the sensor element is provided with a gas introduction part. The element cover has an inner cover and an outer cover, with a space opened between the inner cover and outer cover. Inner side flow holes provided in the inner cover are disposed closer to an axial-direction base end than is a tapered-diameter step part. The distance between the tip of the sensor element and the inner-side flow holes of the inner cover, with respect to an axial direction, is less than or equal to 1.6 mm.
    Type: Application
    Filed: September 9, 2016
    Publication date: September 6, 2018
    Inventors: Takashi ARAKI, Takehito KIMATA, Mitsunobu NAKATOU
  • Publication number: 20180224396
    Abstract: A gas concentration measuring apparatus is provided which works to calculate the concentration of a given gas component with enhanced accuracy. The gas concentration measuring apparatus 1 includes, a gas sensor 10 and a calculating portion 11. The gas sensor 10 is equipped with a pump cell 3, a monitor cell 4, and a sensor cell 5. The calculating portion 11 subtracts a monitor cell current Im that is a current flowing through the monitor cell 4 from a sensor cell current Is that is a current flowing through the sensor cell 5 to calculate the concentration of the given gas component in gas g. When calculating the concentration of the given gas component, the calculating portion 11 performs a correction operation to bring a value of the monitor cell current Im close to a value of an oxygen dependent current Iso that is a component of the sensor cell current Is which arises from the concentration of oxygen.
    Type: Application
    Filed: April 6, 2018
    Publication date: August 9, 2018
    Inventors: Yuusuke TOUDOU, Takehito KIMATA, Toru KATAFUCHI
  • Publication number: 20180031518
    Abstract: A gas sensor is equipped with a solid electrolyte body, a pump electrode, a sensor electrode, and a heater. In the gas sensor, a region of the whole of a front end portion of a heater base in which a heating element is disposed is broken down into three regions: an intermediate region defined between a front end and a base end of the sensor electrode, a front end region located closer to a front end side than the intermediate region is, and a base end region located closer to a base end side than the intermediate region is. A resistance value per unit area of a heating element lying in the base end region and a resistance value per unit area of the heating element lying in the front end region is selected to be higher than that of the heating element lying in the intermediate region, thereby keeping the temperature of a region around the sensor electrode at a desired level even when the temperature of gas changes.
    Type: Application
    Filed: February 12, 2016
    Publication date: February 1, 2018
    Inventors: Takehito KIMATA, Yuusuke TOUDOU, Yuusuke KAWAMOTO
  • Publication number: 20170219516
    Abstract: A gas concentration detection apparatus is provided with a measuring gas chamber, a solid electrolyte body, a pump cell, a sensor cell, a pump cell controller and a sensor cell detection section. The pump cell controller applies an elimination voltage to the pump cell at a start-up point, before a gas concentration is detected. The water in the measuring gas chamber is decomposed and hydrogen is generated by application of the elimination voltage. Oxygen occluded in a sensor electrode of the sensor cell is removed by the hydrogen.
    Type: Application
    Filed: October 1, 2015
    Publication date: August 3, 2017
    Inventors: Yuusuke TOUDOU, Takehito KIMATA, Yuusuke KAWAMOTO
  • Publication number: 20170191957
    Abstract: A gas sensor device is equipped with the sensor cell, the pump cell, the inner void space, and the gas inlet. The sensor cell is created by a portion of the solid electrolyte body and a pair of sensor electrodes disposed on the solid electrolyte body. The pump cell is created by a portion of the solid electrolyte body and a pair of pump electrodes disposed on the solid electrolyte body. The inner void space faces the sensor electrode and the pump electrode. If a dimension of said gas inlet in a direction in which the measurement gas flows in the gas inlet is defined as L1, a sectional area of the gas inlet taken perpendicular to the direction of flow of the measurement gas in the gas inlet is defined as S1, a distance between the gas inlet and the sensor cell is defined as L2, and a sectional area of the inner void space taken perpendicular to a direction in which the pump cell and the sensor cell are aligned with each other is defined as S2, a relation of 1000?(L1/S1)×(L2/S2)?5000 is met.
    Type: Application
    Filed: July 8, 2015
    Publication date: July 6, 2017
    Inventors: Yuusuke TOUDOU, Takehito KIMATA, Mitsunobu NAKATOU
  • Publication number: 20170184536
    Abstract: An SCU as a control device for the gas sensor (first and second NOx sensors) includes an applied voltage switching unit for switching an applied voltage of a pump cell when a deterioration detecting function is performed, and a deterioration rate calculation unit for calculating a deterioration rate of a sensor cell based on a slope during a transient change in an output of the sensor cell according to a switching of the applied voltage by the applied voltage switching unit.
    Type: Application
    Filed: December 22, 2016
    Publication date: June 29, 2017
    Inventors: Yusuke KAWAMOTO, Toru KATAFUCHI, Takehito KIMATA, Ryozo KAYAMA