Patents by Inventor Seiji NAKAHIGASHI
Seiji NAKAHIGASHI 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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Publication number: 20240018891Abstract: Provided is an exhaust gas purification system that allows suppressing the emission of carbon monoxide (CO). An exhaust gas purification system includes a three-way catalyst and a particulate filter and a control device. The three-way catalyst and the particulate filter are arranged respectively on an upstream side and a downstream side of an exhaust channel connected to an internal combustion engine. The control device controls the internal combustion engine so as to execute fuel cut during a deceleration operation of the internal combustion engine. The particulate filter includes a honeycomb substrate and an outflow cell side catalyst layer. The honeycomb substrate includes a porous partition wall defining a plurality of cells extending from an inflow side end surface to an outflow side end surface. The plurality of cells include an inflow cell and an outflow cell adjacent across the partition wall. The inflow cell has an open inflow side end and a sealed outflow side end.Type: ApplicationFiled: July 6, 2023Publication date: January 18, 2024Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATIONInventors: Koji SUGIURA, Seiji NAKAHIGASHI, Masatoshi IKEBE, Takaya OTA, Takeshi MORISHIMA, Eiji HARADA
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Patent number: 11759769Abstract: 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: GrantFiled: October 7, 2021Date of Patent: September 19, 2023Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATIONInventors: Isao Chinzei, Seiji Nakahigashi, Takumi Tojo, Masahide Miura, Nobuyuki Takagi, Yoshiteru Yazawa, Sho Hoshino, Minoru Ito, Naoto Fujita, Tomomasa Aikawa
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Patent number: 11719144Abstract: The present disclosure provides an exhaust gas purification catalyst having improved durability, which comprises a substrate and a catalyst coat layer formed on the substrate, the catalyst coat layer having a two-layer structure, wherein the catalyst coat layer includes an upstream portion on an upstream side and a downstream portion on a downstream side in an exhaust gas flow direction, and a part or all of the upstream portion is formed on a part of the downstream portion, wherein the downstream portion contains Rh fine particles, and wherein the Rh fine particles have an average particle size measured by a transmission electron microscope observation of 1.0 nm or more to 2.0 nm or less, and a standard deviation ? of the particle size of 0.8 nm or less.Type: GrantFiled: December 14, 2020Date of Patent: August 8, 2023Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATIONInventors: Norimichi Shimano, Shogo Shirakawa, Masahide Miura, Isao Chinzei, Seiji Nakahigashi, Hiroki Nihashi, Hiromi Togashi, Tomomasa Aikawa, Isao Naito
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Patent number: 11633724Abstract: Methods for exhaust gas purification, including the steps of: attaching an exhaust gas purification catalyst to an exhaust system of an internal combustion engine, and supplying an exhaust gas to the exhaust gas purification catalyst, where the exhaust gas purification catalyst includes an upper layer containing first carrier particles which are particles of an inorganic oxide and rhodium, and a lower layer containing second carrier particles which are particles of an inorganic oxide, the upper layer includes a rhodium-rich portion near the surface of the upper layer on the upstream side of the exhaust gas flow, and the existence range of the rhodium-rich portion is in a range of greater than 50% to 80% of the length of the upper layer from a downstream side end of an exhaust gas flow and of less than 20 ?m in the depth direction from an outermost surface of the upper layer.Type: GrantFiled: July 11, 2022Date of Patent: April 25, 2023Assignees: CATALER CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shunsuke Oishi, Takaya Ota, Yoshinori Saito, Seiji Nakahigashi, Isao Chinzei, Hiromasa Suzuki
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Patent number: 11607672Abstract: Methods for exhaust gas purification, including the steps of: attaching an exhaust gas purification catalyst to an exhaust system of an internal combustion engine, and supplying an exhaust gas to the exhaust gas purification catalyst, where the exhaust gas purification catalyst includes an upper layer containing first carrier particles which are particles of an inorganic oxide and rhodium, and a lower layer containing second carrier particles which are particles of an inorganic oxide, the upper layer includes a rhodium-rich portion near the surface of the upper layer on the upstream side of the exhaust gas flow, and the existence range of the rhodium-rich portion is in a range of greater than 50% to 80% of the length of the upper layer from a downstream side end of an exhaust gas flow and of less than 20 ?m in the depth direction from an outermost surface of the upper layer.Type: GrantFiled: July 11, 2022Date of Patent: March 21, 2023Assignees: CATALER CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shunsuke Oishi, Takaya Ota, Yoshinori Saito, Seiji Nakahigashi, Isao Chinzei, Hiromasa Suzuki
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Patent number: 11577226Abstract: The present disclosure provides an exhaust gas purification catalyst having an improved Rh activation, which comprises a substrate and a catalyst coat layer formed on the substrate, the catalyst coat layer having a two-layer structure, wherein the catalyst coat layer includes an upstream portion on an upstream side and a downstream portion on a downstream side in an exhaust gas flow direction, and a part or all of the upstream portion is formed on a part of the downstream portion, wherein the upstream portion contains Rh fine particles and Pt, wherein the Rh fine particles have an average particle size measured by a transmission electron microscope observation of 1.0 nm or more to 2.0 nm or less, and a standard deviation ? of the particle size of 0.8 nm or less, and wherein the downstream portion contains Rh.Type: GrantFiled: December 1, 2020Date of Patent: February 14, 2023Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATIONInventors: Seiji Nakahigashi, Isao Chinzei, Shogo Shirakawa, Hiromasa Suzuki, Masahide Miura, Takahiro Nishio, Norimichi Shimano, Hiroki Nihashi, Mitsuyoshi Okada, Takashi Onozuka, Souta Akiyama, Hiromi Togashi, Takahiro Noguchi, Isao Naito
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Patent number: 11559768Abstract: The present disclosure provides the exhaust gas purification catalyst with the improved purification performance under the high Ga condition and the transient state in which an A/F repeats rich and lean phases. The present disclosure relates to an exhaust gas purification catalyst comprising a catalyst coating layer on a substrate, the catalyst coating layer containing a noble metal, a composite oxide containing cerium oxide and zirconium oxide, and a composite oxide containing aluminum oxide, wherein in the catalyst coating layer: an average thickness of the coating layer is in a range from 20 ?m to 100 ?m; a porosity measured by a weight-in-water method is in a range from 50% by volume to 80% by volume; and high-aspect-ratio pores having an aspect ratio of 5 or more account for 0.Type: GrantFiled: April 17, 2020Date of Patent: January 24, 2023Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATIONInventors: Isao Chinzei, Masahide Miura, Seiji Nakahigashi, Hiromasa Suzuki, Akira Morikawa, Toshio Yamamoto, Satoru Katoh, Takashi Onozuka, Hirotaka Ori, Mitsuyoshi Okada, Sho Hoshino
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Patent number: 11524285Abstract: The exhaust gas purification catalyst device includes an upper layer which includes first carrier particles and rhodium, and a lower layer which includes second carrier particles, and the upper layer includes a rhodium enriched area in the range a, from the upstream end in the exhaust gas flow to 50% of the upper layer length, and a range b from the upper layer top surface to 18 ?m in the depth direction. The rhodium enriched area contains at least 50% and less than 100% of all the rhodium in the upper layer.Type: GrantFiled: January 25, 2019Date of Patent: December 13, 2022Assignees: CATALER CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shunsuke Oishi, Takaya Ota, Isao Chinzei, Hiromasa Suzuki, Yoshinori Saito, Seiji Nakahigashi
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Publication number: 20220339606Abstract: Methods for exhaust gas purification, including the steps of: attaching an exhaust gas purification catalyst to an exhaust system of an internal combustion engine, and supplying an exhaust gas to the exhaust gas purification catalyst, where the exhaust gas purification catalyst includes an upper layer containing first carrier particles which are particles of an inorganic oxide and rhodium, and a lower layer containing second carrier particles which are particles of an inorganic oxide, the upper layer includes a rhodium-rich portion near the surface of the upper layer on the upstream side of the exhaust gas flow, and the existence range of the rhodium-rich portion is in a range of greater than 50% to 80% of the length of the upper layer from a downstream side end of an exhaust gas flow and of less than 20 ?m in the depth direction from an outermost surface of the upper layer.Type: ApplicationFiled: July 11, 2022Publication date: October 27, 2022Applicants: CATALER CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shunsuke OISHI, Takaya OTA, Yoshinori SAITO, Seiji NAKAHIGASHI, Isao CHINZEI, Hiromasa SUZUKI
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Patent number: 11426710Abstract: The present disclosure relates to an exhaust gas control catalyst including a base and a catalyst coating layer having a two-layer structure on the base. The catalyst coating layer includes a lower layer on the base, and an upper layer on the lower layer. The upper layer of the catalyst coating layer contains Rh particles in which a mean particle diameter measured by observation using a transmission electron microscope is 1.0 nm or more and 2.0 nm or less and a particle-diameter standard deviation ? is 0.8 nm or less. A length of the upper layer from an end face on a downstream side in an exhaust gas flow direction falls within a range of 70% or more and 100% or less of a total length of the base.Type: GrantFiled: November 4, 2020Date of Patent: August 30, 2022Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATIONInventors: Takahiro Nishio, Shogo Shirakawa, Masahide Miura, Isao Chinzei, Seiji Nakahigashi, Norimichi Shimano, Hiromi Togashi, Hiroki Nihashi, Mitsuyoshi Okada, Takashi Onozuka, Souta Akiyama, Isao Naito
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Patent number: 11400436Abstract: The present disclosure provides an exhaust gas purification catalyst having an improved low-temperature activity, which comprises a substrate and a catalyst coat layer formed on the substrate, wherein the catalyst coat layer contains Rh fine particles and a promoter comprising a Ce—Zr-based composite oxide and a Zr-based composite oxide not containing cerium oxide, wherein the Rh fine particles have an average particle size measured by a transmission electron microscope observation of 1.0 nm or more to 2.0 nm or less, and a standard deviation ? of the particle size of 0.8 nm or less, and wherein the Rh fine particles are supported on each of the Ce—Zr-based composite oxide and the Zr-based composite oxide not containing cerium oxide.Type: GrantFiled: November 30, 2020Date of Patent: August 2, 2022Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATIONInventors: Isao Chinzei, Seiji Nakahigashi, Shogo Shirakawa, Hiromasa Suzuki, Masahide Miura, Takahiro Nishio, Norimichi Shimano, Hiroki Nihashi, Hiromi Togashi, Mitsuyoshi Okada, Takashi Onozuka, Souta Akiyama, Isao Naito
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Publication number: 20220118428Abstract: 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: ApplicationFiled: October 7, 2021Publication date: April 21, 2022Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATIONInventors: Isao Chinzei, Seiji NAKAHIGASHI, Takumi TOJO, Masahide MIURA, Noboyuki TAKAGI, Yoshiteru YAZAWA, Sho HOSHINO, Minoru ITO, Naoto FUJITA, Tomomasa AIKAWA
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Publication number: 20210205790Abstract: The present disclosure provides an exhaust gas purification catalyst having an improved Rh activation, which comprises a substrate and a catalyst coat layer formed on the substrate, the catalyst coat layer having a two-layer structure, wherein the catalyst coat layer includes an upstream portion on an upstream side and a downstream portion on a downstream side in an exhaust gas flow direction, and a part or all of the upstream portion is formed on a part of the downstream portion, wherein the upstream portion contains Rh fine particles and Pt, wherein the Rh fine particles have an average particle size measured by a transmission electron microscope observation of 1.0 nm or more to 2.0 nm or less, and a standard deviation ? of the particle size of 0.8 nm or less, and wherein the downstream portion contains Rh.Type: ApplicationFiled: December 1, 2020Publication date: July 8, 2021Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATIONInventors: Seiji NAKAHIGASHI, Isao CHINZEI, Shogo SHIRAKAWA, Hiromasa SUZUKI, Masahide MIURA, Takahiro NISHIO, Norimichi SHIMANO, Hiroki NIHASHI, Mitsuyoshi OKADA, Takashi ONOZUKA, Souta AKIYAMA, Hiromi TOGASHI, Takahiro NOGUCHI, Isao NAITO
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Patent number: 11053833Abstract: The present disclosure provides the exhaust gas purification catalyst with the improved purification performance under the high Ga condition and the atmosphere where the A/F is rich. The present disclosure relates to an exhaust gas purification catalyst including a catalyst coating layer on a substrate, the catalyst coating layer containing a noble metal and a metal oxide, wherein in the catalyst coating layer: an average thickness of the coating layer is in a range from 50 ?m to 100 ?m; a porosity measured by a weight-in-water method is in a range from 50% by volume to 80% by volume; and high-aspect-ratio pores having an aspect ratio of 5 or more account for 0.Type: GrantFiled: April 24, 2020Date of Patent: July 6, 2021Assignee: Toyota Jidosha Kabushiki KaishaInventors: Isao Chinzei, Masahide Miura, Seiji Nakahigashi, Hiromasa Suzuki, Toshio Yamamoto, Akira Morikawa, Satoru Katoh, Takashi Onozuka, Hirotaka Ori, Mitsuyoshi Okada, Sho Hoshino
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Publication number: 20210197175Abstract: The present disclosure relates to an exhaust gas control catalyst including a base and a catalyst coating layer having a two-layer structure on the base. The catalyst coating layer includes a lower layer on the base, and an upper layer on the lower layer. The upper layer of the catalyst coating layer contains Rh particles in which a mean particle diameter measured by observation using a transmission electron microscope is 1.0 nm or more and 2.0 nm or less and a particle-diameter standard deviation ? is 0.8 nm or less. A length of the upper layer from an end face on a downstream side in an exhaust gas flow direction falls within a range of 70% or more and 100% or less of a total length of the base.Type: ApplicationFiled: November 4, 2020Publication date: July 1, 2021Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATIONInventors: Takahiro NISHIO, Shogo SHIRAKAWA, Masahide MIURA, Isao CHINZEI, Seiji NAKAHIGASHI, Norimichi SHIMANO, Hiromi TOGASHI, Hiroki NIHASHI, Mitsuyoshi OKADA, Takashi ONOZUKA, Souta AKIYAMA, Isao NAITO
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Publication number: 20210197176Abstract: The present disclosure provides an exhaust gas purification catalyst having an improved low-temperature activity, which comprises a substrate and a catalyst coat layer formed on the substrate, wherein the catalyst coat layer contains Rh fine particles and a promoter comprising a Ce—Zr-based composite oxide and a Zr-based composite oxide not containing cerium oxide, wherein the Rh fine particles have an average particle size measured by a transmission electron microscope observation of 1.0 nm or more to 2.0 nm or less, and a standard deviation a of the particle size of 0.8 nm or less, and wherein the Rh fine particles are supported on each of the Ce—Zr-based composite oxide and the Zr-based composite oxide not containing cerium oxide.Type: ApplicationFiled: November 30, 2020Publication date: July 1, 2021Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATIONInventors: Isao CHINZEI, Seiji NAKAHIGASHI, Shogo SHIRAKAWA, Hiromasa SUZUKI, Masahide MIURA, Takahiro NISHIO, Norimichi SHIMANO, Hiroki NIHASHI, Hiromi TOGASHI, Mitsuyoshi OKADA, Takashi ONOZUKA, Souta AKIYAMA, Isao NAITO
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Publication number: 20210199037Abstract: The present disclosure provides an exhaust gas purification catalyst having improved durability, which comprises a substrate and a catalyst coat layer formed on the substrate, the catalyst coat layer having a two-layer structure, wherein the catalyst coat layer includes an upstream portion on an upstream side and a downstream portion on a downstream side in an exhaust gas flow direction, and a part or all of the upstream portion is formed on a part of the downstream portion, wherein the downstream portion contains Rh fine particles, and wherein the Rh fine particles have an average particle size measured by a transmission electron microscope observation of 1.0 nm or more to 2.0 nm or less, and a standard deviation a of the particle size of 0.8 nm or less.Type: ApplicationFiled: December 14, 2020Publication date: July 1, 2021Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATIONInventors: Norimichi Shimano, Shogo Shirakawa, Masahide Miura, Isao Chinzei, Seiji Nakahigashi, Hiroki Nihashi, Hiromi Togashi, Tomomasa Aikawa, Isao Naito
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Publication number: 20210094027Abstract: The exhaust gas purification catalyst device includes an upper layer which includes first carrier particles and rhodium, and a lower layer which includes second carrier particles, and the upper layer includes a rhodium enriched area in the range a, from the upstream end in the exhaust gas flow to 50% of the upper layer length, and a range b from the upper layer top surface to 18 ?m in the depth direction. The rhodium enriched area contains at least 50% and less than 100% of all the rhodium in the upper layer.Type: ApplicationFiled: January 25, 2019Publication date: April 1, 2021Applicants: CATALER CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shunsuke OISHI, Takaya OTA, Isao CHINZEI, Hiromasa SUZUKI, Yoshinori SAITO, Seiji NAKAHIGASHI
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Publication number: 20200376467Abstract: This exhaust gas purification catalyst device includes an upper layer which includes first carrier particles and rhodium, and a lower layer which includes second carrier particles, and the upper layer includes a rhodium enriched area in the range a, from the downstream end in the exhaust gas flow to greater than 50% and up to 80% of the upper layer length, and a range b from the upper layer top surface less than 20 ?m in the depth direction. The rhodium enriched area contains at least 50% and less than 100% of all the rhodium in the upper layer.Type: ApplicationFiled: January 29, 2019Publication date: December 3, 2020Applicants: CATALER CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shunsuke OISHI, Takaya OTA, Yoshinori SAITO, Seiji NAKAHIGASHI, Isao CHINZEI, Hiromasa SUZUKI
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Publication number: 20200355106Abstract: The present disclosure provides the exhaust gas purification catalyst with the improved purification performance under the high Ga condition and the atmosphere where the A/F is rich. The present disclosure relates to an exhaust gas purification catalyst including a catalyst coating layer on a substrate, the catalyst coating layer containing a noble metal and a metal oxide, wherein in the catalyst coating layer: an average thickness of the coating layer is in a range from 50 ?m to 100 ?m; a porosity measured by a weight-in-water method is in a range from 50% by volume to 80% by volume; and high-aspect-ratio pores having an aspect ratio of 5 or more account for 0.Type: ApplicationFiled: April 24, 2020Publication date: November 12, 2020Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATIONInventors: Isao JIDOSHA CHINZEI, Masahide MIURA, Seiji NAKAHIGASHI, Hiromasa SUZUKI, Toshio YAMAMOTO, Akira MORIKAWA, Satoru KATOH, Takashi ONOZUKA, Hirotaka ORI, Mitsuyoshi OKADA, Sho HOSHINO