Patents by Inventor Hisaya Kawabata
Hisaya Kawabata 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).
-
Patent number: 9890676Abstract: A device includes a first catalyst 41 including a Pd-containing catalyst layer and a Rh-containing catalyst layer and a second catalyst 42 containing Pt-loaded alumina and containing neither Rh nor Pd. The first catalyst or the second catalyst are disposed in one place in such a manner that one of the first catalyst 41 or the second catalyst 42 is located upstream of the other in a flow direction of an exhaust gas from an engine 1.Type: GrantFiled: May 18, 2015Date of Patent: February 13, 2018Assignee: MAZDA MOTOR CORPORATIONInventors: Hisaya Kawabata, Yasuhiro Matsumura, Hiroshi Yamada, Masahiko Shigetsu
-
Patent number: 9732648Abstract: An exhaust gas purification catalytic device 1 contains Pt, Pd, and Rh as catalytic metals. The catalytic metal Pt is loaded on silica-alumina which serves as a support, and Pt-loaded silica-alumina obtained by loading the Pt on the silica-alumina is contained in a catalytic layer with which an exhaust gas contacts first.Type: GrantFiled: October 15, 2014Date of Patent: August 15, 2017Assignee: MAZDA MOTOR CORPORATIONInventors: Hiroshi Yamada, Masahiko Shigetsu, Hisaya Kawabata, Yasuhiro Matsumura, Kazuya Yokota, Toshihiko Ohsumi, Takeo Yamauchi, Yusuke Koike
-
Publication number: 20160258330Abstract: An exhaust gas purification catalytic device 1 contains Pt, Pd, and Rh as catalytic metals. The catalytic metal Pt is loaded on silica-alumina which serves as a support, and Pt-loaded silica-alumina obtained by loading the Pt on the silica-alumina is contained in a catalytic layer with which an exhaust gas contacts first.Type: ApplicationFiled: October 15, 2014Publication date: September 8, 2016Applicant: MAZDA MOTOR CORPORATIONInventors: Hiroshi YAMADA, Masahiko SHIGETSU, Hisaya KAWABATA, Yasuhiro MATSUMURA, Kazuya YOKOTA, Toshihiko OHSUMI, Takeo YAMAUCHI, Yusuke KOIKE
-
Publication number: 20160228853Abstract: An exhaust gas purification catalytic material is made of a composite oxide. This composite oxide contains Zr and a plurality of rare earth metals, and is doped with Rh. An surface portion of the composite oxide has a higher concentration of at least one of the rare earth metals than an inner portion thereof.Type: ApplicationFiled: October 30, 2014Publication date: August 11, 2016Applicant: MAZDA MOTOR CORPORATIONInventors: Yasuhiro MATSUMURA, Masahiko SHIGETSU, Hisaya KAWABATA, Yuki KODA
-
Publication number: 20160222851Abstract: A device includes a first catalyst 41 including a Pd-containing catalyst layer and a Rh-containing catalyst layer and a second catalyst 42 containing Pt-loaded alumina and containing neither Rh nor Pd. The first catalyst or the second catalyst are disposed in one place in such a manner that one of the first catalyst 41 or the second catalyst 42 is located upstream of the other in a flow direction of an exhaust gas from an engine 1.Type: ApplicationFiled: May 18, 2015Publication date: August 4, 2016Applicant: MAZDA MOTOR CORPORATIONInventors: Hisaya KAWABATA, Yasuhiro MATSUMURA, Hiroshi YAMADA, Masahiko SHIGETSU
-
Patent number: 9266093Abstract: An exhaust gas purification catalyst includes a Rh-containing catalyst layer provided on a base material. The Rh-containing catalyst layer includes Rh-supporting Zr-based composite oxide in which Rh6 is supported on Zr-based composite oxide containing Zr and a rare earth metal except Ce. The Rh-supporting Zr-based composite oxide has been previously subjected to a reduction treatment.Type: GrantFiled: February 18, 2014Date of Patent: February 23, 2016Assignee: MAZDA MOTOR CORPORATIONInventors: Yasuhiro Matsumura, Akihide Takami, Masahiko Shigetsu, Hisaya Kawabata, Masaaki Akamine
-
Patent number: 9174198Abstract: An exhaust gas purification catalytic material for purifying exhaust gas from an engine includes ZrLaY composite oxide containing ZrO2 as a main component, 2% by mass or more and 10% by mass or less of La2O3, and 2% by mass or more and 20% by mass or less of Y2O3, and Rh is loaded on the composite oxide.Type: GrantFiled: March 14, 2013Date of Patent: November 3, 2015Assignee: Mazda Motor CorporationInventors: Hisaya Kawabata, Masaaki Akamine, Yasuhiro Matsumura, Masahiko Shigetsu, Akihide Takami
-
Patent number: 9144788Abstract: An exhaust gas purification catalyst includes a Rh-containing catalyst layer provided on a base material. The Rh-containing catalyst layer includes a binder material of Rh-doped CeZr-based composite oxide containing Ce and Zr and doped with Rh. The binder material has been previously subjected to a reduction treatment.Type: GrantFiled: February 18, 2014Date of Patent: September 29, 2015Assignee: Mazda Motor CorporationInventors: Yasuhiro Matsumura, Akihide Takami, Masahiko Shigetsu, Hisaya Kawabata, Masaaki Akamine, Yuki Murakami
-
Publication number: 20150087503Abstract: An exhaust gas purification catalytic material for purifying exhaust gas from an engine includes ZrLaY composite oxide containing ZrO2 as a main component, 2% by mass or more and 10% by mass or less of La2O3, and 2% by mass or more and 20% by mass or less of Y2O3, and Rh is loaded on the composite oxide.Type: ApplicationFiled: March 14, 2013Publication date: March 26, 2015Applicant: MAZDA MOTOR CORPORATIONInventors: Hisaya Kawabata, Masaaki Akamine, Yasuhiro Matsumura, Masahiko Shigetsu, Akihide Takami
-
Patent number: 8912116Abstract: A catalyst layer includes: a first mixed oxide particle component 4 which contains Ce and Rh 8 and in which Rh is partially exposed at particle surfaces; and a second mixed oxide particle component 5 containing Ce, Zr, and a rare earth metal except Ce. The particle size distribution of the first mixed oxide particle component 4 has a peak in the particle size range from 100 nm to 300 nm, both inclusive. The particle size distribution of the second mixed oxide particle component 5 has a peak in a particle size range larger than the particle size range in which the first mixed oxide particle component 4 has the peak. At least part of particles of the first mixed oxide particle component 4 is attached to at least part of particles of the second mixed oxide particle component 5.Type: GrantFiled: July 29, 2010Date of Patent: December 16, 2014Assignee: Mazda Motor CorporationInventors: Masaaki Akamine, Hideharu Iwakuni, Hisaya Kawabata, Yasuhiro Ochi, Yuki Murakami, Susumu Mineoi, Akihide Takami, Masahiko Shigetsu
-
Publication number: 20140235434Abstract: An exhaust gas purification catalyst includes a Rh-containing catalyst layer provided on a base material. The Rh-containing catalyst layer includes a binder material of Rh-doped CeZr-based composite oxide containing Ce and Zr and doped with Rh. The binder material has been previously subjected to a reduction treatment.Type: ApplicationFiled: February 18, 2014Publication date: August 21, 2014Applicant: MAZDA MOTOR CORPORATIONInventors: Yasuhiro MATSUMURA, Akihide TAKAMI, Masahiko SHIGETSU, Hisaya KAWABATA, Masaaki AKAMINE, Yuki MURAKAMI
-
Publication number: 20140235433Abstract: An exhaust gas purification catalyst includes a Rh-containing catalyst layer provided on a base material. The Rh-containing catalyst layer includes Rh-supporting Zr-based composite oxide in which Rh6 is supported on Zr-based composite oxide containing Zr and a rare earth metal except Ce. The Rh-supporting Zr-based composite oxide has been previously subjected to a reduction treatment.Type: ApplicationFiled: February 18, 2014Publication date: August 21, 2014Applicant: MAZDA MOTOR CORPORATIONInventors: Yasuhiro MATSUMURA, Akihide TAKAMI, Masahiko SHIGETSU, Hisaya KAWABATA, Masaaki AKAMINE
-
Publication number: 20110045968Abstract: A catalyst layer includes: a first mixed oxide particle component 4 which contains Ce and Rh 8 and in which Rh is partially exposed at particle surfaces; and a second mixed oxide particle component 5 containing Ce, Zr, and a rare earth metal except Ce. The particle size distribution of the first mixed oxide particle component 4 has a peak in the particle size range from 100 nm to 300 nm, both inclusive. The particle size distribution of the second mixed oxide particle component 5 has a peak in a particle size range larger than the particle size range in which the first mixed oxide particle component 4 has the peak. At least part of particles of the first mixed oxide particle component 4 is attached to at least part of particles of the second mixed oxide particle component 5.Type: ApplicationFiled: July 29, 2010Publication date: February 24, 2011Applicant: MAZDA MOTOR CORPORATIONInventors: Masaaki AKAMINE, Hideharu IWAKUNI, Hisaya KAWABATA, Yasuhiro OCHI, Yuki MURAKAMI, Susumu MINEOI, Akihide TAKAMI, Masahiko SHIGETSU
-
Publication number: 20070265160Abstract: A catalyst component of Rh carried on a ZrLa mixed oxide coated on activated alumina particles and a catalyst component of Rh carried on an oxygen storage component coexist in a catalytic coating on a support.Type: ApplicationFiled: April 18, 2007Publication date: November 15, 2007Inventors: Hisaya Kawabata, Masahiko Shigetsu, Masaaki Akamine
-
Publication number: 20070179054Abstract: A catalytic matter comprises alumina particles. A compound oxide is loaded on surfaces of the alumina particles. The compound oxide contains cerium, zirconium, and lanthanum, but not aluminum. A catalytic metal is loaded on the surfaces of the alumina particles. The catalytic matter may be manufactured by preparing a first acidic solution containing aluminum, adding a first basic solution to the first acidic solution, thereby obtaining a second basic solution and precipitating a first hydroxide in the second basic solution, preparing a second acidic solution containing cerium, zirconium and lanthanum, adding the second acidic solution to the first hydroxide, thereby precipitating a second hydroxide on the first hydroxide, drying the first and second hydroxides to obtain an oxide matter, and loading a catalytic metal on the oxide matter.Type: ApplicationFiled: February 1, 2007Publication date: August 2, 2007Applicant: Mazda Motor CorporationInventors: Masaaki Akamine, Masahiko Shigetsu, Hisaya Kawabata
-
Patent number: 7235511Abstract: An exhaust gas purifying catalyst includes a carrier and a catalyst layer provided on the carrier. The catalyst layer includes active Al2O3 on which a noble metal is carried, an oxygen storage agent on which Rh is carried, Al2O3 coated with ZrO2 on which Rh is carried, and a binder material.Type: GrantFiled: September 3, 2004Date of Patent: June 26, 2007Assignees: Tokyo Roki Co., Ltd., Mazda Motor CorporationInventors: Tomohiko Kawamoto, Katsuyuki Fujita, Tadashi Tokuyama, Masahiko Shigetsu, Masaaki Akamine, Hisaya Kawabata, Hideharu Iwakuni, Akihide Takami
-
Publication number: 20060223698Abstract: Catalytic converter for exhaust gas purification comprises a carrier, an oxide layer positioned above the carrier and comprising a compound oxide of cerium (Ce) and magnesium (Mg) with its molar ratio of Mg/(Ce+Mg), and a catalytic metal loaded on the oxide layer. By comprising the compound oxide of cerium and magnesium in the oxide layer, higher purification performance or lower light-off temperature can be obtained under the lean exhaust gas condition during the engine startup.Type: ApplicationFiled: March 7, 2006Publication date: October 5, 2006Applicant: Mazda Motor CorporationInventors: Hisaya Kawabata, Masahiko Shigetsu
-
Publication number: 20060217263Abstract: In an exhaust gas purification catalyst in which a catalytic coating containing plural kinds of aluminas and plural kinds of oxygen storage components each carrying a catalytic precious metal is coated on a honeycomb support, the catalytic coating is formed of an upper layer and a lower layer, palladium is carried on a first alumina and a Ce—Zr—La—Y-alumina compound having oxygen storage capacity in the lower layer, platinum is carried on a second alumina in the upper layer, and rhodium is carried on a third alumina and a Ce—Zr—Nd mixed oxide having oxygen storage capacity in the upper layer.Type: ApplicationFiled: March 9, 2006Publication date: September 28, 2006Applicants: TOKYO ROKI CO., LTD, MAZDA MOTOR CORPORATIONInventors: Tomohiko Kawamoto, Katsuyuki Fujita, Tadashi Tokuyama, Hisaya Kawabata, Masahiko Shigetsu, Masaaki Akamine, Akihide Takami
-
Patent number: 6953769Abstract: A catalyst comprises an HC trapping material that is capable of trapping HC in an exhaust gas under low temperatures and releasing HC with a raise in temperature and catalytic material containing a Ce—Pr double oxide capable of oxidizing and purifying HC from the HC trapping material with a high efficiency.Type: GrantFiled: March 25, 2002Date of Patent: October 11, 2005Assignee: Mazda Motor CorporationInventors: Hiroshi Yamada, Seiji Miyoshi, Akihide Takami, Kenji Okamoto, Masahiko Shigetsu, Hisaya Kawabata
-
Patent number: 6927191Abstract: An inside layer including zeolite and an outside layer including alumina and Pd are formed in a layered shape on a carrier, and Ag and Bi are simultaneously allowed to be carried on the inside and outside layers through impregnation. Thus, production of an alloy through a reaction between Pd and Ag can be suppressed by Bi.Type: GrantFiled: August 2, 2002Date of Patent: August 9, 2005Assignee: Mazda Motor CorporationInventors: Hisaya Kawabata, Masahiko Shigetsu, Kazuo Misonoo