Patents by Inventor Yuki Koda
Yuki Koda 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: 11499509Abstract: An exhaust gas recirculation system for a multi-cylinder engine is provided, which includes an exhaust manifold connected to a cylinder head, a catalyst connected to a downstream end of the exhaust manifold in terms of an exhaust gas flow, an EGR gas outlet provided downstream of the catalyst, an in-head EGR passage penetrating the cylinder head, and an EGR pipe extending from the EGR gas outlet and directly connected to an inlet of the in-head EGR passage to lead EGR gas thereto. The catalyst is disposed so that the exhaust gas flows therein from a first side to a second side in an engine cylinder lined-up direction. The EGR gas outlet is located on the second side with respect to the center of the engine in the cylinder lined-up direction, and the inlet of the in-head EGR passage is located in the first side with respect to the engine center.Type: GrantFiled: October 20, 2021Date of Patent: November 15, 2022Assignee: Mazda Motor CorporationInventors: Tomonori Nishida, Yuji Kojima, Noriaki Fujita, Ken Yoshida, Takashi Kariya, Takayuki Tominaga, Naoya Matsumoto, Yusaku Matsumura, Yuki Koda, Takuya Nishihara, Hiroyuki Ohmura, Arashi Imura, Fusatoshi Tanaka, Takuya Yamada, Shintaro Umesaki
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Publication number: 20220128019Abstract: An exhaust gas recirculation system for a multi-cylinder engine is provided, which includes an exhaust manifold connected to a cylinder head, a catalyst connected to a downstream end of the exhaust manifold in terms of an exhaust gas flow, an EGR gas outlet provided downstream of the catalyst, an in-head EGR passage penetrating the cylinder head, and an EGR pipe extending from the EGR gas outlet and directly connected to an inlet of the in-head EGR passage to lead EGR gas thereto. The catalyst is disposed so that the exhaust gas flows therein from a first side to a second side in an engine cylinder lined-up direction. The EGR gas outlet is located on the second side with respect to the center of the engine in the cylinder lined-up direction, and the inlet of the in-head EGR passage is located in the first side with respect to the engine center.Type: ApplicationFiled: October 20, 2021Publication date: April 28, 2022Inventors: Tomonori Nishida, Yuji Kojima, Noriaki Fujita, Ken Yoshida, Takashi Kariya, Takayuki Tominaga, Naoya Matsumoto, Yusaku Matsumura, Yuki Koda, Takuya Nishihara, Hiroyuki Ohmura, Arashi Imura, Fusatoshi Tanaka, Takuya Yamada, Shintaro Umesaki
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Publication number: 20200324643Abstract: A fuel supply device of an engine includes: a fuel tank; a fuel filter which is disposed in front of the fuel tank in a front-rear direction of a vehicle; a fuel pump which is disposed in front of the fuel filter in the front-rear direction of the vehicle; a first fuel supply pipe which connects the fuel tank and the fuel filter to each other; and a second fuel supply pipe which connects the fuel filter and the fuel pump to each other. A first connecting portion to which the first fuel supply pipe is connected is formed on a front portion of the fuel filter, and a second connecting portion to which the second fuel supply pipe is connected is formed on a rear portion of the fuel filter.Type: ApplicationFiled: March 3, 2020Publication date: October 15, 2020Inventors: Kazuaki HOKAZONO, Osamu NOZAKI, Yoshiyuki MATSUMOTO, Yusuke IKUSHIMA, Hirotoshi SAITO, Kazutoshi MATSUYAMA, Tetsuya DATE, Yuki KODA
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Publication number: 20160325488Abstract: In thermal pressure joining of joining a metal member to a resin member, a metal member (11) and a resin member (12) are stacked one on the other, a press member (160) applies heat and pressure locally on the metal member to soften and melt the resin member, the resin member is then solidified, the press member (160) is pressed into the metal member (11) to a depth shallower than a joint boundary (13) between the metal and resin members to deform a portion (110) of the metal member directly under the press member such that the portion protrudes toward the resin member, and resin (121) melted on a surface of the resin member in a region (60) of the joint boundary directly under the press member flows to an outer periphery (61) of the region (60).Type: ApplicationFiled: January 7, 2015Publication date: November 10, 2016Applicant: MAZDA MOTOR CORPORATIONInventors: Koujirou TANAKA, Katsuya NISHIGUCHI, Hirosuke SUMIDA, Hiroyuki KAI, Yushi MATSUDA, Yuki KODA, Megumi KOBAYASHI, Tsuguhisa MIYAMOTO, Yukihiro SUGIMOTO, Nobuo SAKATE
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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
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Patent number: 8872031Abstract: A twisted pair wire includes a pair of covered wires each formed by covering stranded conductors with a covering body. The covering body includes a covering body material including a silane coupling agent. Alternatively, the covering body includes a plurality of covering layers, and an innermost layer of the plurality of covering layers contacting with the stranded conductors includes a covering body material including a silane coupling agent.Type: GrantFiled: April 11, 2012Date of Patent: October 28, 2014Assignee: Hitachi Metals, Ltd.Inventors: Shinji Hinoshita, Yuki Koda
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Publication number: 20120298400Abstract: A twisted pair wire includes a pair of covered wires each formed by covering stranded conductors with a covering body. The covering body includes a covering body material including a silane coupling agent. Alternatively, the covering body includes a plurality of covering layers, and an innermost layer of the plurality of covering layers contacting with the stranded conductors includes a covering body material including a silane coupling agent.Type: ApplicationFiled: April 11, 2012Publication date: November 29, 2012Applicant: HITACHI CABLE, LTD.Inventors: Shinji HINOSHITA, Yuki KODA
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Publication number: 20030134743Abstract: An exhaust gas purifying system and a catalyst used for the system prevents NOx absorbent from being poisoned by a sulfur compound to keep NOx absorption performance. The catalyst has at least an inner and an outer layer on a support material, the inner layer having NOx absorbent capable of absorbing NOx and a sulfur compound in the exhaust gas produced from combustion of a lean fuel mixture, releasing the NOx into the exhaust gas and substantially stopping absorbing the sulfur compound when a rich mixture is burnt, and the outer layer having a sulfur compound absorbent capable of absorbing the sulfur compound in the exhaust gas produced from combustion of a lean fuel mixture and capable of discharging the sulfur compound into the exhaust gas when a rich fuel mixture is burnt while the engine operates in a lean-burn zone. NOx is absorbed by the NOx absorbent in the inner layer and the sulfur compound is adsorbed in the sulfur compound absorbent in the outer layer.Type: ApplicationFiled: September 14, 2001Publication date: July 17, 2003Inventors: Hirosuke Sumida, Yuki Koda, Makoto Kyogoku, Hideharu Iwakuni, Hiroshi Yamada, Kenji Okamoto, Akihide Takami
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Publication number: 20010036901Abstract: An exhaust gas purifying catalyst includes at least an under catalytic layer disposed on a substrate containing a NOx absorbent which absorbs NOx in exhaust gas under existence of oxygen, releases absorbed NOx when an oxygen concentration of exhaust gas lowers and is restrained from absorbing NOx by sulfur compounds in exhaust gas and an outer oxide layer disposed over the under catalytic layer and containing a Ce—Zr composite oxide.Type: ApplicationFiled: September 28, 1999Publication date: November 1, 2001Inventors: YUKI KODA, HIROSUKE SUMIDA, MAKOTO KYOGOKU
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Patent number: 6120746Abstract: The active temperature of an exhaust gas cleaning catalyst is shifted to a higher temperature side when Al.sub.2 O.sub.3 and/or CeO.sub.2 is used as a co-catalyst and/or when an oxidation number of Pt or Ir which is used as the noble active component is plus four.Type: GrantFiled: May 26, 1998Date of Patent: September 19, 2000Assignee: Mazda Motor CorporationInventors: Takashi Takemoto, Makoto Kyogoku, Yuki Koda, Akihide Takami, Satoshi Ichikawa, Hideharu Iwakuni, Masahiko Shigetsu, Kazunari Komatsu
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Patent number: 6090744Abstract: In the exhaust gas purifying catalyst (3), palladium is contained as a catalytic component and cerium oxide and (Ce, Pr) compound oxide is contained as a promoter. Now, the weight ratio of cerium oxide to (Ce, Pr) compound oxide is set between 9/1 and 7/3, and the ratio of praseodymium to cerium in the (Ce, Pr) compound oxide is set between 3 mol % and 50 mol %. In this way, because in this exhaust gas purifying catalyst (3), palladium with high low-temperature activity is used for a catalytic component, the exhaust gas purifying performance at low temperature is improved. And because cerium oxide and (Ce, Pr) compound oxide improves catalytic activity of palladium at high temperature, the exhaust gas purifying performance at high temperature, in particular, NOx purifying performance, is improved.Type: GrantFiled: March 27, 1997Date of Patent: July 18, 2000Assignee: Mazda Motor CorporationInventors: Yuki Koda, Satoshi Ichikawa, Hiroshi Yamada, Kenichi Yamamoto, Kenji Okamoto, Toshitsugu Ueoka, Hiroshi Murakami, Takashi Takemoto, Kazuo Misonoo, Masahiko Shigetsu, Taeko Shimizu
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Patent number: 5958828Abstract: An exhaust gas purifying catalyst (3) has an inner catalytic layer (5) fixed on a carrier (4). In the inner catalytic layer (5), there are held a palladium component, platinum component and a rhodium component by a base material containing an alumina component composed of alumina impregnated with lanthanum. Further, the exhaust gas purifying catalyst (3) has an outer catalytic layer (6) formed on the inner catalytic layer (5). In the outer catalytic layer (6), a palladium component is held by a base material which contains an alumina component, an oxide complex of ceria and zirconia and a magnesium component.Type: GrantFiled: February 26, 1996Date of Patent: September 28, 1999Assignee: Mazda Motor CorporationInventors: Hiroshi Murakami, Hiroshi Yamada, Kenji Okamoto, Kaori Imada, Yuki Koda, Osamu Takayama, Shinichi Tanioka
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Patent number: 5849660Abstract: A catalyst (3) for purifying an automotive exhaust gas, in which inner and outer catalytic layers (5,6), each of which has a base material and a catalytic material held by the base material, are stratified on a honeycomb-type carrier (4). In the catalyst (3), the inner catalytic layer (5) contains a palladium component as the catalytic component. Further the inner catalytic layer (5) contains a nickel oxide component for preventing poisoning of the palladium component. On the other hand, though the outer catalytic layer (6) contains a rhodium component as the catalytic component, it does not contain a palladium component nor a nickel oxide component.Type: GrantFiled: February 26, 1996Date of Patent: December 15, 1998Assignee: Mazda Motor CorporationInventors: Takashi Takemoto, Kazunari Komatsu, Taeko Shimizu, Hiroshi Yamada, Hiroshi Murakami, Masayuki Koishi, Yuki Koda, Keiko Matsui