Patents by Inventor Tomoya AKITOMO
Tomoya AKITOMO 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: 11078872Abstract: An engine with an EGR device includes an engine case, and an EGR pipe that introduces an EGR gas into an intake path. The EGR pipe is arranged to pass through an inside of the engine case. A part of the EGR pipe in the engine case is arranged to face a cooling water path in the engine case. The engine case is defined by a cylinder head. The cooling water path is arranged to surround a whole circumference of the EGR pipe.Type: GrantFiled: November 28, 2018Date of Patent: August 3, 2021Assignee: KUBOTA CORPORATIONInventors: Yoshikazu Takemoto, Hideyuki Goto, Takahito Hamasaki, Kentaro Nagai, Tomoya Akitomo, Kumiko Sakaguchi
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Patent number: 10941684Abstract: A cylinder head cover that prevents the gas outlet for the blow-by gas from being cooled by structural improvements so that the gas outlet does not freeze or become clogged in a cold condition. A cylinder head cover includes: a gas passage through which blow-by gas from a crankcase passes; and a gas outlet portion protruding upward from a head cover upper wall. The gas outlet portion includes a protruding case portion bulging upward from the head cover upper wall so as to form an outlet passage through which blow-by gas passes, and an air layer is formed outside the outlet passage in the protruding case portion.Type: GrantFiled: November 14, 2019Date of Patent: March 9, 2021Assignee: KUBOTA CORPORATIONInventors: Kentaro Nagai, Takahiro Yamazaki, Reo Yoshida, Tomoya Akitomo, Shoichi Okimi
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Publication number: 20200208551Abstract: A cylinder head cover that prevents the gas outlet for the blow-by gas from being cooled by structural improvements so that the gas outlet does not freeze or become clogged in a cold condition. A cylinder head cover includes: a gas passage through which blow-by gas from a crankcase passes; and a gas outlet portion protruding upward from a head cover upper wall. The gas outlet portion includes a protruding case portion bulging upward from the head cover upper wall so as to form an outlet passage through which blow-by gas passes, and an air layer is formed outside the outlet passage in the protruding case portion.Type: ApplicationFiled: November 14, 2019Publication date: July 2, 2020Inventors: Kentaro NAGAI, Takahiro YAMAZAKI, Reo YOSHIDA, Tomoya AKITOMO, Shoichi OKIMI
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Publication number: 20190203669Abstract: An engine with an EGR device includes an engine case, and an EGR pipe that introduces an EGR gas into an intake path. The EGR pipe is arranged to pass through an inside of the engine case. A part of the EGR pipe in the engine case is arranged to face a cooling water path in the engine case. The engine case is defined by a cylinder head. The cooling water path is arranged to surround a whole circumference of the EGR pipe.Type: ApplicationFiled: November 28, 2018Publication date: July 4, 2019Inventors: Yoshikazu TAKEMOTO, Hideyuki GOTO, Takahito HAMASAKI, Kentaro NAGAI, Tomoya AKITOMO, Kumiko SAKAGUCHI
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Patent number: 9765671Abstract: An engine exhaust treatment apparatus, which suppresses thermal damage to an electrothermal ignition apparatus, includes: an exhaust passage; an oxidation catalyst disposed in the exhaust passage; a combustible gas generator; a combustible gas supplying passage; a heat dissipation port opened upstream in the exhaust passage from the oxidation catalyst and in a downstream part of the combustible gas supplying passage, the exhaust passage and the combustible gas supplying passage communicating with each other through the heat dissipation port; and an electrothermal ignition apparatus disposed in the combustible gas supplying passage. Heat of flaming combustion of the combustible gas ignited by the electrothermal ignition apparatus is supplied to the exhaust passage, to raise the temperature of exhaust in the exhaust passage. A heat dissipation plate is attached to an outer projecting portion of the electrothermal ignition apparatus.Type: GrantFiled: March 4, 2014Date of Patent: September 19, 2017Assignee: KUBOTA CorporationInventors: Hideyuki Koyama, Tomoya Akitomo, Yuichi Tamaki, Ryutaro Komura
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Patent number: 9518490Abstract: An exhaust gas processing device for an engine, capable of securely warming a combustion catalyst, is provided. A combustion catalyst burning gas is produced when a warming end condition for the combustion catalyst is established, which signifies the establishment of either one of a first condition or a second condition. In the first condition, an inlet temperature of a combustion catalyst is equal to or higher than an activation requirement temperature of the combustion catalyst, and further, an outlet temperature of the combustion catalyst is equal to or higher than an activation confirmation temperature of the combustion catalyst in excess of the inlet temperature of the combustion catalyst. In the second condition, the outlet temperature of the combustion catalyst exceeds a warming confirmation temperature of the combustion catalyst that is set to be higher as an engine speed is lower, for a predetermined period of time.Type: GrantFiled: March 9, 2015Date of Patent: December 13, 2016Assignee: KUBOTA CorporationInventors: Katsuaki Arai, Takashi Onishi, Yoshikazu Takemoto, Tomoya Akitomo
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Patent number: 9416704Abstract: It is an object of the present invention to provide an exhaust gas treatment device of an engine capable of preventing matching surfaces of catalyst portions configuring a combustible gas catalyst from being thermally damaged. In the exhaust gas treatment device, combustible gas is produced by combustible gas generating catalyst, exhaust gas heated by combustion of combustible gas is supplied to an exhaust gas treatment portion, the combustible gas generating catalyst comprises an aggregate of a plurality of catalyst portions, each of the catalyst portions includes a matching surface with respect to adjacent one of the catalyst portions, a fastening ring is fitted over the combustible gas generating catalyst in which the matching surfaces of the adjacent catalyst portions are abutted against each other, and the matching surfaces of the adjacent catalyst portions are brought into tight contact with each other by a fastening force of the fastening ring.Type: GrantFiled: September 5, 2014Date of Patent: August 16, 2016Assignee: KUBOTA CorporationInventors: Yuichi Tamaki, Yoshikazu Takemoto, Takashi Onishi, Mitsugu Okuda, Tomoya Akitomo
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Patent number: 9200551Abstract: An exhaust treatment apparatus for an engine including a combustible gas supplying passage; a heat releasing port opened in an upstream side in the exhaust passage from the oxidation catalyst and in a downstream side in the combustible gas supplying passage, the exhaust passage and the combustible gas supplying passage communicating with each other through the heat releasing port; an ignition apparatus beneath the heat releasing port, the heat of flaming combustion of combustible gas ignited by the ignition apparatus being supplied to the exhaust passage to raise the temperature of exhaust in the exhaust passage; a flame holding plate in a downstream side in the combustible gas supplying passage from the ignition apparatus, an exhaust guiding plate at the top portion of the flame holding plate, the exhaust guiding plate having an upward slope toward a downstream side in the exhaust passage.Type: GrantFiled: December 17, 2013Date of Patent: December 1, 2015Assignee: KUBOTA CorporationInventors: Mitsugu Okuda, Yoshikazu Takemoto, Takashi Onishi, Hozumi Ishida, Manabu Miyazaki, Yuichi Tamaki, Tomoya Akitomo, Katsuaki Arai
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Publication number: 20150275729Abstract: An exhaust gas processing device for an engine, capable of securely warming a combustion catalyst, is provided. A combustion catalyst burning gas is produced when a warming end condition for the combustion catalyst is established, which signifies the establishment of either one of a first condition or a second condition. In the first condition, an inlet temperature of a combustion catalyst is equal to or higher than an activation requirement temperature of the combustion catalyst, and further, an outlet temperature of the combustion catalyst is equal to or higher than an activation confirmation temperature of the combustion catalyst in excess of the inlet temperature of the combustion catalyst. In the second condition, the outlet temperature of the combustion catalyst exceeds a warming confirmation temperature of the combustion catalyst that is set to be higher as an engine speed is lower, for a predetermined period of time.Type: ApplicationFiled: March 9, 2015Publication date: October 1, 2015Inventors: Katsuaki ARAI, Takashi ONISHI, Yoshikazu TAKEMOTO, Tomoya AKITOMO
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Publication number: 20150118120Abstract: It is an object of the present invention to provide an exhaust gas treatment device of an engine capable of preventing matching surfaces of catalyst portions configuring a combustible gas catalyst from being thermally damaged. In the exhaust gas treatment device, combustible gas is produced by combustible gas generating catalyst, exhaust gas heated by combustion of combustible gas is supplied to an exhaust gas treatment portion, the combustible gas generating catalyst comprises an aggregate of a plurality of catalyst portions, each of the catalyst portions includes a matching surface with respect to adjacent one of the catalyst portions, a fastening ring is fitted over the combustible gas generating catalyst in which the matching surfaces of the adjacent catalyst portions are abutted against each other, and the matching surfaces of the adjacent catalyst portions are brought into tight contact with each other by a fastening force of the fastening ring.Type: ApplicationFiled: September 5, 2014Publication date: April 30, 2015Inventors: Yuichi TAMAKI, Yoshikazu TAKEMOTO, Takashi ONISHI, Mitsugu OKUDA, Tomoya AKITOMO
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Publication number: 20140290226Abstract: An engine exhaust treatment apparatus, which suppresses thermal damage to an electrothermal ignition apparatus, includes: an exhaust passage; an oxidation catalyst disposed in the exhaust passage; a combustible gas generator; a combustible gas supplying passage; a heat dissipation port opened upstream in the exhaust passage from the oxidation catalyst and in a downstream part of the combustible gas supplying passage, the exhaust passage and the combustible gas supplying passage communicating with each other through the heat dissipation port; and an electrothermal ignition apparatus disposed in the combustible gas supplying passage. Heat of flaming combustion of the combustible gas ignited by the electrothermal ignition apparatus is supplied to the exhaust passage, to raise the temperature of exhaust in the exhaust passage. A heat dissipation plate is attached to an outer projecting portion of the electrothermal ignition apparatus.Type: ApplicationFiled: March 4, 2014Publication date: October 2, 2014Applicant: KUBOTA CorporationInventors: Hideyuki KOYAMA, Tomoya AKITOMO, Yuichi TAMAKI, Ryutaro KOMURA
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Publication number: 20140174061Abstract: An exhaust treatment apparatus for an engine including a combustible gas supplying passage; a heat releasing port opened in an upstream side in the exhaust passage from the oxidation catalyst and in a downstream side in the combustible gas supplying passage, the exhaust passage and the combustible gas supplying passage communicating with each other through the heat releasing port; an ignition apparatus beneath the heat releasing port, the heat of flaming combustion of combustible gas ignited by the ignition apparatus being supplied to the exhaust passage to raise the temperature of exhaust in the exhaust passage; a flame holding plate in a downstream side in the combustible gas supplying passage from the ignition apparatus, an exhaust guiding plate at the top portion of the flame holding plate, the exhaust guiding plate having an upward slope toward a downstream side in the exhaust passage.Type: ApplicationFiled: December 17, 2013Publication date: June 26, 2014Applicant: KUBOTA CORPORATIONInventors: Mitsugu OKUDA, Yoshikazu TAKEMOTO, Takashi ONISHI, Hozumi ISHIDA, Manabu MIYAZAKI, Yuichi TAMAKI, Tomoya AKITOMO, Katsuaki ARAI