Patents by Inventor Hiroki Nishijima
Hiroki Nishijima 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).
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Patent number: 11812597Abstract: A multi-layered material is provided for shielding low-frequency electromagnetic waves. The multi-layered material may include a plurality of repeating sets of alternating layers of materials. Each repeating set of alternating layers may include an electrically conductive layer and a magnetic layer including a continuous layer of a magnetic material. The multi-layered material is generally configured to shield electromagnetic waves having a frequency of less than about 1 MHz. In various aspects, the electrically conductive layer may include a conductive metal layer, or a two-dimensional transitional metal carbide. The multi-layered material may be provided as a thin film, or can be shaped or sized as flakes for use with a resin composite that is deposited via a spray application technique.Type: GrantFiled: November 5, 2020Date of Patent: November 7, 2023Assignees: Toyota Motor Engineering & Manufacturing North America, Inc., Toyota Jidosha Kabushiki KaishaInventors: Xiaoshi Su, Debasish Banerjee, Hiroki Nishijima
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Publication number: 20230332283Abstract: The present disclosure provides a radio wave transmissive metallic member having an excellent metallic luster. The present disclosure relates to a metallic member and a method for manufacturing the same. The metallic member comprises a substrate body, an ion-exchange resin layer formed on the substrate body, and a metal particle layer formed on the ion-exchange resin layer, wherein metal particles having a high aspect ratio are longitudinally oriented with respect to the ion-exchange resin layer and the substrate body.Type: ApplicationFiled: March 28, 2023Publication date: October 19, 2023Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Daiki KUBOYAMA, Jyunya MURAI, Hiroki NISHIJIMA, Miwako SHIONOYA
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Publication number: 20220195607Abstract: A coating film has a multilayer structure including stacked nanosheets of an inorganic oxide and has a thickness of a certain level or more, as well as a composite material containing a metallic material and the coating film provided on the metallic material.Type: ApplicationFiled: November 18, 2021Publication date: June 23, 2022Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, NATIONAL INSTITUTE FOR MATERIALS SCIENCEInventors: Yoshiharu MIYAKE, Hitoshi ISHII, Tomohiro MIWA, Hiroki NISHIJIMA, Takaaki TANIGUCHI, Takayoshi SASAKI, Nobuyuki SAKAI, Leanddas NURDIWIJAYANTO, Ai YANAGISAWA
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Publication number: 20220142022Abstract: A multi-layered material is provided for shielding low-frequency electromagnetic waves. The multi-layered material may include a plurality of repeating sets of alternating layers of materials. Each repeating set of alternating layers may include an electrically conductive layer and a magnetic layer including a continuous layer of a magnetic material. The multi-layered material is generally configured to shield electromagnetic waves having a frequency of less than about 1 MHz. In various aspects, the electrically conductive layer may include a conductive metal layer, or a two-dimensional transitional metal carbide. The multi-layered material may be provided as a thin film, or can be shaped or sized as flakes for use with a resin composite that is deposited via a spray application technique.Type: ApplicationFiled: November 5, 2020Publication date: May 5, 2022Inventors: Xiaoshi Su, Debasish Banerjee, Hiroki Nishijima
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Publication number: 20210270200Abstract: A gas sensor includes a sensor element body having a porous layer provided on an outer surface, and a power supply device which supplies power to a heater element that is in the sensor element body. The amount of power being applied to the heater element by the power supply device when gas detection is being performed by the gas sensor in a steady state is designated as P [W], the volume of the length range of a heating region of the heater element provided in the sensor element body as V [mm3], and the applied power density as X [W/mm3], where X is a value expressed by P/V. In that case, the following relationship is satisfied between the applied power density X and the average thickness Y [?m] of the porous layer: Y?509.32?2884.89X+5014.Type: ApplicationFiled: April 28, 2020Publication date: September 2, 2021Inventors: Toru TAKEUCHI, Tomotaka MORI, Shota IMADA, Yoshiharu MIYAKE, Hiroki NISHIJIMA, Haruki KONDO, Yasushi HIRATA
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Patent number: 10837939Abstract: The present disclosure provides a gas sensor element comprising a porous protective layer with improved water repellency upon continuously water pouring, which is a gas sensor element comprising: a detection portion; and a porous protective layer formed around the detection portion, wherein the porous protective layer is formed from an aggregate containing alumina and a coating material containing silica, and in the porous protective layer, the weight concentration x % by weight of the coating material with respect to the total weight of the aggregate and the coating material, and the porosity y %, satisfy the following formula (1): y?0.0058x2?1.2666x+68??(1), and in the porous protective layer, the pore volume of pores having a pore diameter of 100 nm or less is 0.02 mL/g or less.Type: GrantFiled: January 24, 2019Date of Patent: November 17, 2020Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATIONInventors: Hiroki Nishijima, Yoshiharu Miyake, Haruki Kondo, Yasushi Hirata, Hirofumi Suzuki, Kei Sugiura, Toru Takeuchi
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Publication number: 20200256270Abstract: A gas sensor includes a sensor element body having a porous layer provided on an outer surface, and a power supply device which supplies power to a heater element that is in the sensor element body. The amount of power being applied to the heater element by the power supply device when gas detection is being performed by the gas sensor in a steady state is designated as P [W], the volume of the length range of a heating region of the heater element provided in the sensor element body as V [mm3], and the applied power density as X [W/mm3], where X is a value expressed by P/V. In that case, the following relationship is satisfied between the applied power density X and the average thickness Y [?m] of the porous layer: Y?509.32?2884.89X+5014.Type: ApplicationFiled: April 28, 2020Publication date: August 13, 2020Inventors: Toru TAKEUCHI, Tomotaka MORI, Shota IMADA, Yoshiharu MIYAKE, Hiroki NISHIJIMA, Haruki KONDO, Yasushi HIRATA
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Publication number: 20190242848Abstract: The present disclosure provides a gas sensor element comprising a porous protective layer with improved water repellency upon continuously water pouring, which is a gas sensor element comprising: a detection portion; and a porous protective layer formed around the detection portion, wherein the porous protective layer is formed from an aggregate containing alumina and a coating material containing silica, and in the porous protective layer, the weight concentration x % by weight of the coating material with respect to the total weight of the aggregate and the coating material, and the porosity y %, satisfy the following formula (1): y?0.0058x2-1.2666x+68??(1), and in the porous protective layer, the pore volume of pores having a pore diameter of 100 nm or less is 0.02 mL/g or less.Type: ApplicationFiled: January 24, 2019Publication date: August 8, 2019Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATIONInventors: Hiroki NISHIJIMA, Yoshiharu MIYAKE, Haruki KONDO, Yasushi HIRATA, Hirofumi SUZUKI, Kei SUGIURA, Toru TAKEUCHI
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Patent number: 10371659Abstract: A gas sensor element with suppressed response deterioration even when poisoned with S when fuel or exhaust gas contains ethanol and the ethanol content is high. The element includes a detection portion, which includes a solid electrolyte layer having a pair of electrodes on opposite sides thereof, a shielding layer defining a measurement target gas space with a porous diffusive resistance layer, and a reference gas space protective layer; a heat-generating portion stacked on the detection portion; and a porous protective layer surrounding the detection portion and heat-generating portion. The porous protective layer includes a first porous protective layer surrounding at least the porous diffusive resistance layer, and a second porous protective layer surrounding the first porous protective layer, the detection portion and the heat-generating portion. The first porous protective layer contains none of La, Ca, or Mg, while the second porous protective layer contains at least one of them.Type: GrantFiled: February 12, 2016Date of Patent: August 6, 2019Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATIONInventors: Tetsuya Kato, Satoshi Nakamura, Hiroki Nishijima, Makoto Ito
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Patent number: 9958412Abstract: A gas sensor element having a porous protective layer with excellent water repellency. Provided is a gas sensor element having a detection portion, which has a stack of a solid electrolyte body having a pair of electrodes on opposite sides thereof and a heat generating body including a heat generating source, and a porous protective layer formed around the detection portion. The porous protective layer has thermal conductivity ? in the range of 0.2 to 5 W/mK, and has ?Cp?, which is the product of the thermal conductivity ?(W/mK), density ?(g/m3), and specific heat Cp(J/gK), in the range of 5.3×105 to 2.1×107 WJ/m4K2.Type: GrantFiled: July 7, 2015Date of Patent: May 1, 2018Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATIONInventors: Hiroki Nishijima, Yoshiharu Miyake, Haruki Kondo, Makoto Nakae, Tooru Takeuchi, Masayuki Tamura, Atsushi Murai
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Publication number: 20180017514Abstract: A gas sensor element with suppressed response deterioration even when poisoned with S when fuel or exhaust gas contains ethanol and the ethanol content is high. The element includes a detection portion, which includes a solid electrolyte layer having a pair of electrodes on opposite sides thereof, a shielding layer defining a measurement target gas space with a porous diffusive resistance layer, and a reference gas space protective layer; a heat-generating portion stacked on the detection portion; and a porous protective layer surrounding the detection portion and heat-generating portion. The porous protective layer includes a first porous protective layer surrounding at least the porous diffusive resistance layer, and a second porous protective layer surrounding the first porous protective layer, the detection portion and the heat-generating portion. The first porous protective layer contains none of La, Ca, or Mg, while the second porous protective layer contains at least one of them.Type: ApplicationFiled: February 12, 2016Publication date: January 18, 2018Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATIONInventors: Tetsuya KATO, Satoshi NAKAMURA, Hiroki NISHIJIMA, Makoto ITO
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Patent number: 9714913Abstract: A control device for an exhaust gas sensor includes first means for estimating a temperature of a sensor element in accordance with impedance of a solid electrolyte, and second means for estimating the temperature of the sensor element in accordance with resistance of a heater. A first element temperature according to impedance of the sensor element in a predetermined detection timing is detected by the first means, and a second element temperature according to resistance of a heater of the sensor element in the predetermined detection timing is detected by the second means. The control device corrects the temperature of the sensor element that is estimated in accordance with heater resistance by the second means in accordance with a difference between the first element temperature and the second element temperature.Type: GrantFiled: February 14, 2012Date of Patent: July 25, 2017Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Hiroki Nishijima
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Patent number: 9702836Abstract: An object of the present invention is to reliably detect clogging in a cover even during a period corresponding to a dead zone of a detection apparatus. A PM sensor includes an element section, an element temperature detection section, a heater, and an element cover. An ECU detects clogging in the element cover based on a difference between an element temperature and an exhaust temperature when the exhaust temperature rises. Furthermore, the ECU detects clogging in the element cover based on temperature rising characteristics of the element section observed when the element section is heated by the heater. Thus, even during the period corresponding to the dead zone of the PM sensor, clogging in the element cover can be reliably detected, thus improving the reliability of the sensor.Type: GrantFiled: September 8, 2010Date of Patent: July 11, 2017Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Hiroki Nishijima
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Patent number: 9528424Abstract: The invention relates to a malfunction diagnosis device for an exhaust gas purification catalyst of an engine. The device calculates, on the basis of a parameter of the engine other than an output value of a NOx concentration sensor, (a) an estimated NO concentration of the exhaust gas and expected to flow out from the catalyst and (b) an estimated particular component concentration of the exhaust gas and expected to flow out from the catalyst. The device calculates an expected output value such that the expected output value calculated when the influence parameter value is a first value is smaller than the expected output value calculated when the influence parameter value is a second value, the expected output value being an output value which is expected to be output from the sensor when the exhaust gas, which includes NO having the expected NO concentration and the particular component having the expected particular component concentration, reaches the sensor.Type: GrantFiled: March 1, 2016Date of Patent: December 27, 2016Assignee: TOYOTA JIDOSHA, KABUSHIKI KAISHAInventors: Keiichiro Aoki, Toyoharu Kaneko, Hiroki Nishijima
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Patent number: 9523632Abstract: A particulate matter sensor comprises an insulating body and a pair of electrodes disposed apart form each other on a main surface of the insulating body. The insulating body includes an insulating portion being equal to or higher than the height of the pair of the electrodes in a direction perpendicular to the main surface, formed on the part where the pair of the electrodes are. In one of the methods for manufacturing the particulate matter sensor, first, an electrode pattern composed of a material for the pair of the electrodes is formed on a body material composing the insulating body, and a mask, having identical pattern of the electrode pattern and composed of material which vaporizes at a temperature equal to or lower than a temperature that the electrode pattern is sintered, is formed on the electrode pattern. A thin film of the material composing the insulating portion is formed, and the electrode pattern and the thin film is sintered to form the electrodes and the insulating portion.Type: GrantFiled: August 29, 2011Date of Patent: December 20, 2016Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroki Nishijima, Tatsuhiro Hashida
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Publication number: 20160258334Abstract: The invention relates to a malfunction diagnosis device for an exhaust gas purification catalyst of an engine. The device calculates, on the basis of a parameter of the engine other than an output value of a NOx concentration sensor, (a) an estimated NO concentration of the exhaust gas and expected to flow out from the catalyst and (b) an estimated particular component concentration of the exhaust gas and expected to flow out from the catalyst. The device calculates an expected output value such that the expected output value calculated when the influence parameter value is a first value is smaller than the expected output value calculated when the influence parameter value is a second value, the expected output value being an output value which is expected to be output from the sensor when the exhaust gas, which includes NO having the expected NO concentration and the particular component having the expected particular component concentration, reaches the sensor.Type: ApplicationFiled: March 1, 2016Publication date: September 8, 2016Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Keiichiro AOKI, Toyoharu KANEKO, Hiroki NISHIJIMA
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Patent number: 9410493Abstract: According to the invention, a particulate matter sensor is installed in an exhaust passage of an internal-combustion engine. A control unit for this internal-combustion engine detects a particulate amount in an exhaust gas through the exhaust passage in response to an output from the particulate matter sensor. Further, the control unit for the internal-combustion engine forms a particulate layer on electrode surfaces of the particulate matter sensor by applying a particulate capturing voltage between the electrodes during a first period. Further, the control unit maintains the formed particulate layer during a second period. It is noted here that the phrase “maintain the formed particulate layer” includes the meanings “maintaining the formed particulate layer as it is” and “inhibiting control to remove the particulate layer”.Type: GrantFiled: August 4, 2011Date of Patent: August 9, 2016Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroki Nishijima, Tatsuhiro Hashida
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Patent number: 9354154Abstract: A porous structure including a pair of electrodes disposed in a flow direction of exhaust gas and a solid electrolyte interposed between the electrodes is arranged in an exhaust passage of an internal combustion engine, and the amount of a particulate matter in exhaust gas is specified based on a potential difference generated between the electrodes.Type: GrantFiled: June 7, 2011Date of Patent: May 31, 2016Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, THE RITSUMEIKAN TRUSTInventors: Hiroki Nishijima, Shinji Ikeda, Keiichiro Aoki, Yoshinobu Yoshihara, Yasufumi Nakanishi, Takaya Suzuki
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Publication number: 20160018357Abstract: A gas sensor element having a porous protective layer with excellent water repellency. Provided is a gas sensor element having a detection portion, which has a stack of a solid electrolyte body having a pair of electrodes on opposite sides thereof and a heat generating body including a heat generating source, and a porous protective layer formed around the detection portion. The porous protective layer has thermal conductivity ? in the range of 0.2 to 5 W/mK, and has ?Cpp, which is the product of the thermal conductivity ?(W/mK), density ?(g/m3), and specific heat Cp(J/gK), in the range of 5.3×105 to 2.1×107 WJ/m4K2.Type: ApplicationFiled: July 7, 2015Publication date: January 21, 2016Applicants: DENSO CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroki NISHIJIMA, Yoshiharu MIYAKE, Haruki KONDO, Makoto NAKAE, Tooru TAKEUCHI, Masayuki TAMURA, Atsushi MURAI
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Patent number: RE47116Abstract: A control apparatus for an internal combustion engine detects an amount of particulate matter contained in an exhaust gas in an exhaust passage, according to an electrical property across electrodes of a particulate matter sensor disposed in the exhaust passage of the internal combustion engine. The term “electrical property” here refers to a property that changes with the amount of particulate matter deposited, for example, a current value of when a predetermined voltage is applied. After the internal combustion engine is started and detection of the amount of the particulate matter is completed, an element section of the particulate matter sensor is set to a predetermined temperature range. The particulate matter deposited on the element section is thereby burned and removed. The control apparatus maintains the element section in the predetermined temperature range after burning and removing the particulate matter until the internal combustion engine stops.Type: GrantFiled: November 30, 2016Date of Patent: November 6, 2018Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Keiichiro Aoki, Hiroki Nishijima