Patents by Inventor Haruna Yanagida
Haruna Yanagida 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: 11378041Abstract: An exhaust gas recirculation (EGR) passage is connected with an intake passage (a bypass passage bypassing a supercharger) of an engine. The EGR passage includes, in a position close to a connection port to the intake passage, an expanding portion in which a passage cross-sectional area expands and which lowers a flow speed of EGR gas so as to reduce an uneven flow, in the connection port, of the EGR gas flowing into the intake passage.Type: GrantFiled: June 27, 2019Date of Patent: July 5, 2022Assignee: Mazda Motor CorporationInventors: Jiro Kato, Taketoshi Yamauchi, Mitsunori Wasada, Ken Yoshida, Kenji Takami, Ryo Yamamoto, Haruna Yanagida, Masayoshi Higashio, Kensuke Ashikaga
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Publication number: 20210262420Abstract: An exhaust gas recirculation (EGR) passage is connected with an intake passage (a bypass passage bypassing a supercharger) of an engine. The EGR passage includes, in a position close to a connection port to the intake passage, an expanding portion in which a passage cross-sectional area expands and which lowers a flow speed of EGR gas so as to reduce an uneven flow, in the connection port, of the EGR gas flowing into the intake passage.Type: ApplicationFiled: June 27, 2019Publication date: August 26, 2021Inventors: Jiro KATO, Taketoshi YAMAUCHI, Mitsunori WASADA, Ken YOSHIDA, Kenji TAKAMI, Ryo YAMAMOTO, Haruna YANAGIDA, Masayoshi HIGASHIO, Kensuke ASHIKAGA
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Patent number: 10598074Abstract: Provided is an exhaust device connected to an engine body. The exhaust device includes a plurality of independent exhaust pipes, each of which has a circular cross section, and which are connected to exhaust ports of cylinders of the engine body; and a mixing pipe having a circular cross section, connected to downstream ends of the independent exhaust pipes, and through which exhaust gas that has passed through the independent exhaust pipes flows in. The independent exhaust pipes are connected to an upstream end of the mixing pipe in such a manner that parts of internal spaces of the circular cross sections overlap each other in a predetermined section from the downstream ends of the independent exhaust pipes toward upstream, and a ratio of overlapping portions of the circular cross sections gradually increases from upstream toward downstream.Type: GrantFiled: November 9, 2016Date of Patent: March 24, 2020Assignee: MAZDA MOTOR CORPORATIONInventors: Jiro Kato, Tatsuya Koga, Shinji Sumi, Haruna Yanagida, Norihisa Murata
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Patent number: 10480378Abstract: A exhaust gas purifier includes a case having a flat transverse section including a pair of facing short sides and a pair of facing long sides, and configured to house a catalytic converter, and an inlet cone including a conical portion, and configured to connect an outlet of the turbine to an inlet of the case. The conical portion includes an inclined wall inclined from a mainstream of the exhaust gas to increase the transverse section of a path of the exhaust gas. A recess recessed inward is formed in a portion corresponding to each of the long sides of the inclined wall of the conical portion.Type: GrantFiled: July 18, 2017Date of Patent: November 19, 2019Assignee: MAZDA MOTOR CORPORATIONInventors: Toshiaki Kamo, Hirokazu Hasegawa, Haruna Yanagida, Miki Noguchi
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Patent number: 10233832Abstract: An exhaust purification device of a multi-cylinder engine which improves exhaust gas purification performance by substantially uniforming a flow rate of exhaust gas throughout a treatment carrier such as a catalyst and improving dispersibility of the exhaust gas from the multi-cylinder engine to the catalyst and other components in the exhaust purification device wherein two collecting pipes are arranged at substantially symmetric positions across a partition plate part, which has a linear cross sectional shape, and is arranged centrally between the pipes which are each formed into D-shaped cross sectional shapes and comprise a first straight line part, a pair of second straight line parts connected with respective ends of a first straight line part and arranged to be substantially parallel with each other, and a circular arc part that connects ends of a pair of second straight line parts on opposite sides of the first straight line part.Type: GrantFiled: August 13, 2015Date of Patent: March 19, 2019Assignee: Mazda Motor CorporationInventors: Hiroki Shimoji, Tsukasa Hoshino, Ryo Yamamoto, Haruna Yanagida, Koji Endo
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Publication number: 20180266302Abstract: Provided is an exhaust device connected to an engine body. The exhaust device includes a plurality of independent exhaust pipes, each of which has a circular cross section, and which are connected to exhaust ports of cylinders of the engine body; and a mixing pipe having a circular cross section, connected to downstream ends of the independent exhaust pipes, and through which exhaust gas that has passed through the independent exhaust pipes flows in. The independent exhaust pipes are connected to an upstream end of the mixing pipe in such a manner that parts of internal spaces of the circular cross sections overlap each other in a predetermined section from the downstream ends of the independent exhaust pipes toward upstream, and a ratio of overlapping portions of the circular cross sections gradually increases from upstream toward downstream.Type: ApplicationFiled: November 9, 2016Publication date: September 20, 2018Applicant: MAZDA MOTOR CORPORATIONInventors: Jiro KATO, Tatsuya KOGA, Shinji SUMI, Haruna YANAGIDA, Norihisa MURATA
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Publication number: 20180030875Abstract: A exhaust gas purifier includes a case having a flat transverse section including a pair of facing short sides and a pair of facing long sides, and configured to house a catalytic converter, and an inlet cone including a conical portion, and configured to connect an outlet of the turbine to an inlet of the case. The conical portion includes an inclined wall inclined from a mainstream of the exhaust gas to increase the transverse section of a path of the exhaust gas. A recess recessed inward is formed in a portion corresponding to each of the long sides of the inclined wall of the conical portion.Type: ApplicationFiled: July 18, 2017Publication date: February 1, 2018Applicant: MAZDA MOTOR CORPORATIONInventors: Toshiaki KAMO, Hirokazu HASEGAWA, Haruna YANAGIDA, Miki NOGUCHI
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Patent number: 9611777Abstract: An exhaust device of a multi-cylinder engine which controls local introduction of exhaust gas to a catalyst device and a variation between cylinders of introduction positions of the exhaust gas to the catalyst device is provided. The exhaust device is arranged so that the cylinders extend in a vehicle width direction at a vehicle front part, and an exhaust line is arranged so as to extend rearward from a rear of the engine, wherein, in sequence from an upstream side of an exhaust gas flow, four independent exhaust pipes corresponding to the cylinders, collecting pipes which collect all independent exhaust pipes, and the catalyst device are provided. The single exhaust pipe includes two bending parts and a downstream part thereof is connected so that the exhaust gas is introduced from a direction that is diagonally lateral to an inlet part of the catalyst device.Type: GrantFiled: August 12, 2015Date of Patent: April 4, 2017Assignee: Mazda Motor CorporationInventors: Jiro Kato, Tatsuya Koga, Shinji Sumi, Haruna Yanagida, Norihisa Murata
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Publication number: 20160084139Abstract: An exhaust device of a multi-cylinder engine which controls local introduction of exhaust gas to a catalyst device and a variation between cylinders of introduction positions of the exhaust gas to the catalyst device is provided. The exhaust device is arranged so that the cylinders extend in a vehicle width direction at a vehicle front part, and an exhaust line is arranged so as to extend rearward from a rear of the engine, wherein, in sequence from an upstream side of an exhaust gas flow, four independent exhaust pipes corresponding to the cylinders, collecting pipes which collect all independent exhaust pipes, and the catalyst device are provided. The single exhaust pipe includes two bending parts and a downstream part thereof is connected so that the exhaust gas is introduced from a direction that is diagonally lateral to an inlet part of the catalyst device.Type: ApplicationFiled: August 12, 2015Publication date: March 24, 2016Inventors: Jiro Kato, Tatsuya Koga, Shinji Sumi, Haruna Yanagida, Norihisa Murata
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Publication number: 20160061089Abstract: An exhaust purification device of a multi-cylinder engine which improves exhaust gas purification performance by substantially uniforming a flow rate of exhaust gas throughout a treatment carrier such as a catalyst and improving dispersibility of the exhaust gas from the multi-cylinder engine to the catalyst and other components in the exhaust purification device wherein two collecting pipes are arranged at substantially symmetric positions across a partition plate part, which has a linear cross sectional shape, and is arranged centrally between the pipes which are each formed into D-shaped cross sectional shapes and comprise a first straight line part, a pair of second straight line parts connected with respective ends of a first straight line part and arranged to be substantially parallel with each other, and a circular arc part that connects ends of a pair of second straight line parts on opposite sides of the first straight line part.Type: ApplicationFiled: August 13, 2015Publication date: March 3, 2016Inventors: Hiroki Shimoji, Tsukasa Hoshino, Ryo Yamamoto, Haruna Yanagida, Koji Endo