Patents by Inventor Ichiro Kitamura
Ichiro Kitamura 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: 10159934Abstract: Provided is an exhaust gas purification catalyst that combines reduction of pressure loss and enhancement of purification performance. This invention provides an exhaust gas purification catalyst comprising a wall-flow-type substrate and first and second catalytic layers. The first catalytic layer is provided to the interior of a partition wall, in contact with an entrance cell, from an exhaust inlet-side end in the running direction, having a length L1 less than Lw. The second catalytic layer is provided to the interior of a partition wall, in contact with an exit cell, from an exhaust outlet-side end in the running direction, having a length L2 less than Lw. An internal portion of partition wall in contact with entrance cell has a substrate-exposing segment near the exhaust outlet-side end.Type: GrantFiled: February 16, 2016Date of Patent: December 25, 2018Assignees: CATALER CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Ichiro Kitamura, Keiichi Narita, Yasutaka Nomura, Ryota Onoe, Yuta Morishita, Junji Kuriyama, Hiroshi Sekine, Akihito Inoue, Daisuke Ochiai, Jun Sawada, Naoto Miyoshi, Masahiko Takeuchi, Akemi Sato, Atsushi Tanaka
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Publication number: 20180028972Abstract: Provided is an exhaust gas purification catalyst that combines reduction of pressure loss and enhancement of purification performance. This invention provides an exhaust gas purification catalyst comprising a wall-flow-type substrate and first and second catalytic layers. The first catalytic layer is provided to the interior of a partition wall, in contact with an entrance cell, from an exhaust inlet-side end in the running direction, having a length L1 less than Lw. The second catalytic layer is provided to the interior of a partition wall, in contact with an exit cell, from an exhaust outlet-side end in the running direction, having a length L2 less than Lw. An internal portion of partition wall in contact with entrance cell has a substrate-exposing segment near the exhaust outlet-side end.Type: ApplicationFiled: February 16, 2016Publication date: February 1, 2018Applicants: CATALER CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Ichiro KITAMURA, Keiichi NARITA, Yasutaka NOMURA, Ryota ONOE, Yuta MORISHITA, Junji KURIYAMA, Hiroshi SEKINE, Akihito INOUE, Daisuke OCHIAI, Jun SAWADA, Naoto MIYOSHI, Masahiko TAKEUCHI, Akemi SATO, Atsushi TANAKA
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Patent number: 9683470Abstract: An exhaust gas control apparatus for an internal combustion engine, controls an exhaust operation of the internal combustion engine (200) provided with an exhaust gas purification catalyst (216) in an exhaust passage (215). The exhaust gas control apparatus for the internal combustion engine is provided with; a warming-up device configured to warm up the exhaust gas purification catalyst; and an oxygen supplying device (220, 221) configured to supply oxygen to the exhaust gas purification catalyst after the end of the warm-up. This makes it possible to preferably desorb sulfur adsorbed to the exhaust gas purification catalyst during warm-up. It is therefore possible to suppress a reduction in purification ability of the exhaust gas purification catalyst due to sulfur coating.Type: GrantFiled: December 27, 2011Date of Patent: June 20, 2017Assignee: Toyota Jidosha Kabushiki KaishaInventors: Takahiko Fujiwara, Norihisa Nakagawa, Kouichi Kimura, Shuntaro Okazaki, Keisuke Nagasaka, Ichiro Kitamura, Satoshi Kamitani, Koji Morita
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Publication number: 20150128572Abstract: An exhaust gas control apparatus for an internal combustion engine, controls an exhaust operation of the internal combustion engine (200) provided with an exhaust gas purification catalyst (216) in an exhaust passage (215). The exhaust gas control apparatus for the internal combustion engine is provided with a warming-up device configured to warm up the exhaust gas purification catalyst; and an oxygen supplying device (220, 221) configured to supply oxygen to the exhaust gas purification catalyst after the end of the warm-up. This makes it possible to preferably desorb sulfur adsorbed to the exhaust gas purification catalyst during warm-up. It is therefore possible to suppress a reduction in purification ability of the exhaust gas purification catalyst due to sulfur coating.Type: ApplicationFiled: December 27, 2011Publication date: May 14, 2015Inventors: Takahiro Fujiwara, Norihisa Nakagawa, Kouichi Kimura, Shuntaro Okazaki, Keisuke Nagasaka, Ichiro Kitamura, Satoshi Kamitani, Koji Morita
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Patent number: 8680004Abstract: Provided is an exhaust gas-purifying catalyst excelling in an exhaust gas-purifying performance. The exhaust gas-purifying catalyst contains a substrate, and a catalyst layer formed on the substrate and containing a precious metal and praseodymium.Type: GrantFiled: January 13, 2011Date of Patent: March 25, 2014Assignee: Cataler CorporationInventors: Ichiro Kitamura, Akimasa Hirai, Kenichi Taki
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Patent number: 8309488Abstract: An exhaust gas purifying catalyst includes a catalyst substrate and a catalyst coating layer containing a noble metal and a refractory inorganic oxide. The catalyst coating layer includes an upstream portion located upstream and a downstream portion located downstream in a flow direction of an exhaust gas. The upstream portion has a layered structure including an upstream portion inside layer containing a cerium-zirconium composite oxide in which a relative proportion of CeO2 is 50 to 95 wt %, as the refractory inorganic oxide and an upstream portion outside layer containing a cerium-zirconium composite oxide in which a relative proportion of ZrO2 is 50 to 95 wt %, as the refractory inorganic oxide. The upstream portion outside layer and the downstream portion contain Rh as the noble metal, and an amount of Rh contained in the upstream portion outside layer is larger than an amount of Rh contained in the downstream portion.Type: GrantFiled: July 18, 2006Date of Patent: November 13, 2012Assignee: Cataler CorporationInventors: Ichiro Kitamura, Kenichi Taki, Akimasa Hirai
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Patent number: 8168560Abstract: An exhaust gas purifying catalyst is provided which includes a catalyst substrate and a catalyst coating layer. The catalyst coating layer is formed on the catalyst substrate and contains a noble metal and a refractory inorganic oxide. The catalyst coating layer has a layered structure including an A-layer and a B-layer. The A-layer contains Pd and Pt as the noble metal in a weight ratio of 3:1 to 20:1. The B-layer includes Rh as the noble metal.Type: GrantFiled: October 4, 2006Date of Patent: May 1, 2012Assignee: Cataler CorporationInventors: Kenichi Taki, Akimasa Hirai, Ichiro Kitamura
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Patent number: 8039418Abstract: A high exhaust gas-purifying performance is achieved. An exhaust gas-purifying catalyst includes a substrate, a lower layer covering the substrate and including an oxygen storage material and palladium, and an upper layer covering the lower layer and including rhodium and a carrier supporting it. The lower layer is rhodium-free. The upper layer has an oxygen storage capacity lower than that of the lower layer.Type: GrantFiled: December 11, 2009Date of Patent: October 18, 2011Assignee: Cataler CorporationInventors: Ichiro Kitamura, Akimasa Hirai, Kenichi Taki
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Patent number: 7998896Abstract: An exhaust gas purifying catalyst having a good ignition performance is provided. The exhaust gas purifying catalyst 1 includes a catalyst substrate 3 and a catalyst coating layer 5 which contains a noble metal and a refractory inorganic oxide and is formed on the catalyst substrate. The exhaust gas purifying catalyst is characterized in that the catalyst coating layer 5 includes an upstream portion 11 located upstream and a downstream portion 13 located downstream in a flow direction of an exhaust gas. The upstream portion 11 has a layered structure including an upstream portion inside layer 17 and an upstream portion outside layer 15. The upstream portion inside layer contains a cerium-zirconium composite oxide in which a relative proportion of CeO2 is 50 to 95 wt %, as the refractory inorganic oxide, and the upstream portion outside layer 15 and the downstream portion 13 contain a cerium-zirconium composite oxide in which a relative proportion of ZrO2 is 50 to 95 wt %, as the refractory inorganic oxide.Type: GrantFiled: July 24, 2006Date of Patent: August 16, 2011Assignee: Cataler CorporationInventors: Ichiro Kitamura, Kenichi Taki, Akimasa Hirai
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Publication number: 20110111949Abstract: Provided is an exhaust gas-purifying catalyst excelling in an exhaust gas-purifying performance. The exhaust gas-purifying catalyst contains a substrate, and a catalyst layer formed on the substrate and containing a precious metal and praseodymium.Type: ApplicationFiled: January 13, 2011Publication date: May 12, 2011Applicant: CATALER CORPORATIONInventors: Ichiro KITAMURA, Akimasa HIRAI, Kenichi TAKI
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Publication number: 20100150792Abstract: An exhaust gas purifying catalyst having a good ignition performance is provided. The exhaust gas purifying catalyst 1 includes a catalyst substrate 3 and a catalyst coating layer 5 which contains a noble metal and a refractory inorganic oxide and is formed on the catalyst substrate. The exhaust gas purifying catalyst is characterized in that the catalyst coating layer 5 includes an upstream portion 11 located upstream and a downstream portion 13 located downstream in a flow direction of an exhaust gas. The upstream portion 11 has a layered structure including an upstream portion inside layer 17 and an upstream portion outside layer 15. The upstream portion inside layer contains a cerium-zirconium composite oxide in which a relative proportion of CeO2 is 50 to 95 wt %, as the refractory inorganic oxide, and the upstream portion outside layer 15 and the downstream portion 13 contain a cerium-zirconium composite oxide in which a relative proportion of ZrO2 is 50 to 95 wt %, as the refractory inorganic oxide.Type: ApplicationFiled: July 24, 2006Publication date: June 17, 2010Applicant: CATALER CORPORATIONInventors: Ichiro Kitamura, Kenichi Taki, Akimasa Hirai
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Patent number: 7737077Abstract: This is to provide a catalyst for purifying exhaust gases, catalyst which are good in terms of the purifying performance.Type: GrantFiled: November 25, 2004Date of Patent: June 15, 2010Assignee: Cataler CorporationInventors: Ichiro Kitamura, Akimasa Hirai, Kenichi Taki
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Publication number: 20100087314Abstract: A high exhaust gas-purifying performance is achieved. An exhaust gas-purifying catalyst includes a substrate, a lower layer covering the substrate and including an oxygen storage material and palladium, and an upper layer covering the lower layer and including rhodium and a carrier supporting it. The lower layer is rhodium-free. The upper layer has an oxygen storage capacity lower than that of the lower layer.Type: ApplicationFiled: December 11, 2009Publication date: April 8, 2010Applicant: CATALER CORPORATIONInventors: Ichiro KITAMURA, Akimasa Hirai, Kenichi Taki
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Publication number: 20090275468Abstract: An exhaust gas purifying catalyst is provided which includes a catalyst substrate and a catalyst coating layer. The catalyst coating layer is formed on the catalyst substrate and contains a noble metal and a refractory inorganic oxide. The catalyst coating layer has a layered structure including an A-layer and a B-layer. The A-layer contains Pd and Pt as the noble metal in a weight ratio of 3:1 to 20:1. The B-layer includes Rh as the noble metal.Type: ApplicationFiled: October 4, 2006Publication date: November 5, 2009Applicant: CATALER CORPORATIONInventors: Kenichi Taki, Akimasa Hirai, Ichiro Kitamura
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Publication number: 20090209408Abstract: A high exhaust gas-purifying efficiency is achieved. An exhaust gas-purifying catalyst includes a substrate, an oxygen storage layer covering the substrate and including an oxygen storage material, and a catalytic layer covering the oxygen storage layer and including palladium, rhodium and a carrier supporting them, the catalytic layer having a precious metal concentration higher than that of the oxygen storage layer.Type: ApplicationFiled: April 17, 2009Publication date: August 20, 2009Applicant: CATALER CORPORATIONInventors: Ichiro KITAMURA, Akimasa Hirai, Kenichi Taki
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Publication number: 20090124492Abstract: An exhaust gas purifying catalyst includes a catalyst substrate and a catalyst coating layer containing a noble metal and a refractory inorganic oxide. The catalyst coating layer includes an upstream portion located upstream and a downstream portion located downstream in a flow direction of an exhaust gas. The upstream portion has a layered structure including an upstream portion inside layer containing a cerium-zirconium composite oxide in which a relative proportion of CeO2 is 50 to 95 wt %, as the refractory inorganic oxide and an upstream portion outside layer containing a cerium-zirconium composite oxide in which a relative proportion of ZrO2 is 50 to 95 wt %, as the refractory inorganic oxide. The upstream portion outside layer and the downstream portion contain Rh as the noble metal, and an amount of Rh contained in the upstream portion outside layer is larger than an amount of Rh contained in the downstream portion.Type: ApplicationFiled: July 18, 2006Publication date: May 14, 2009Applicant: CATALER CORPORATIONInventors: Ichiro Kitamura, Kenichi Taki, Akimasa Hirai
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Publication number: 20080081762Abstract: This is to provide a catalyst for purifying exhaust gases, catalyst which are good in terms of the purifying performance.Type: ApplicationFiled: November 25, 2004Publication date: April 3, 2008Inventors: Ichiro Kitamura, Akimasa Hirai, Kenichi Taki