Patents by Inventor Takeshi Mizobuchi
Takeshi Mizobuchi 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: 9677484Abstract: A fuel reformer includes a reforming-fuel injection valve and a fuel reformer catalyst disposed in an EGR pipe and performs a catalyst recovery control when a preset fuel cut execution condition is satisfied. In the catalyst recovery control, a fuel reforming capacity of the fuel reformer catalyst is recovered by stopping an injection of a main fuel and an injection of a reforming-fuel, while supplying additional air to the catalyst by maintaining both of an EGR valve and a throttle valve in a valve open state. Further, in the catalyst recovery control, temperature and a carbon deposit amount of the fuel reformer catalyst are estimated or detected based on which of an opening of the EGR valve and an opening of the throttle valve are adjusted. As a result, fuel reforming capacity is recovered without decreasing a fuel consumption rate improvement effect and a worsening of exhaust emission or drivability.Type: GrantFiled: September 12, 2014Date of Patent: June 13, 2017Assignee: DENSO CORPORATIONInventors: Hiroyuki Inuzuka, Hideki Obayashi, Takeshi Mizobuchi
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Publication number: 20150075451Abstract: A fuel reformer includes a reforming-fuel injection valve and a fuel reformer catalyst disposed in an EGR pipe and performs a catalyst recovery control when a preset fuel cut execution condition is satisfied. In the catalyst recovery control, a fuel reforming capacity of the fuel reformer catalyst is recovered by stopping an injection of a main fuel and an injection of a reforming-fuel, while supplying additional air to the catalyst by maintaining both of an EGR valve and a throttle valve in a valve open state. Further, in the catalyst recovery control, temperature and a carbon deposit amount of the fuel reformer catalyst are estimated or detected based on which of an opening of the EGR valve and an opening of the throttle valve are adjusted. As a result, fuel reforming capacity is recovered without decreasing a fuel consumption rate improvement effect and a worsening of exhaust emission or drivability.Type: ApplicationFiled: September 12, 2014Publication date: March 19, 2015Inventors: Hiroyuki INUZUKA, Hideki OBAYASHI, Takeshi MIZOBUCHI
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Patent number: 8752529Abstract: A spark ignition internal combustion engine is equipped with a fuel pressure sensor for detecting a viscosity of fuel supplied to a fuel injector based on a variation in a fuel pressure. In a case of stratified combustion by a spray guided injection, an ECU advances a fuel injection start timing of the fuel injector 4 according to the detected viscosity of the fuel. Thus, even if the viscosity of the fuel is significantly high, the fuel-rich area is well formed at a vicinity of the discharge electrode so that a preferable combustion condition can be maintained.Type: GrantFiled: November 7, 2011Date of Patent: June 17, 2014Assignee: Denso CorporationInventors: Masatoshi Basaki, Tomohiro Hayashi, Takeshi Mizobuchi
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Publication number: 20120111301Abstract: A spark ignition internal combustion engine is equipped with a fuel pressure sensor for detecting a viscosity of fuel supplied to a fuel injector based on a variation in a fuel pressure. In a case of stratified combustion by a spray guided injection, an ECU advances a fuel injection start timing of the fuel injector 4 according to the detected viscosity of the fuel. Thus, even if the viscosity of the fuel is significantly high, the fuel-rich area is well formed at a vicinity of the discharge electrode so that a preferable combustion condition can be maintained.Type: ApplicationFiled: November 7, 2011Publication date: May 10, 2012Applicant: DENSO CORPORATIONInventors: Masatoshi Basaki, Tomohiro Hayashi, Takeshi Mizobuchi
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Patent number: 7216624Abstract: A fuel injection valve for an engine includes a nozzle located in the vicinity of a cylinder head of the engine. The nozzle has nozzle holes each being opposed to an in-cylinder space defined in a cylinder of the engine. Each nozzle hole has an imaginary injection line that extends from each nozzle hole into the in-cylinder space. The imaginary injection line is directed toward either an upper surface of the piston or the wall surface of the cylinder. The in-cylinder space includes divided spaces each including the nozzle and at least one imaginary injection line. The divided spaces include a piston-side divided space and a head-side divided space. The head-side divided space contains fuel and air mixed at an air fuel ratio that is greater than an air fuel ratio of fuel and air in the piston-side divided space.Type: GrantFiled: July 5, 2006Date of Patent: May 15, 2007Assignees: Denso Corporation, Nippon Soken, Inc.Inventors: Takeshi Mizobuchi, Kimitaka Saito, Norio Yamamoto, Zhenzhou Su, Masatoshi Basaki, Masao Sawamura
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Patent number: 7191961Abstract: In an injection hole plate of a fuel injection apparatus, a second-side hole section of each injection hole extends from a downstream end of a base wall of the injection hole plate and is communicated with first-side hole sections, which extends from an upstream end of the wall of the injection hole plate to an axially intermediate point of the wall. The first-side hole sections may discharge fuel into the second-side hole section in a manner that forms a swirl fuel flow in the second-side hole section. The injection hole plate may includes a collision portion, in which fuel flows supplied from the first-side hole sections collide with one another.Type: GrantFiled: November 26, 2003Date of Patent: March 20, 2007Assignees: Denso Corporation, Nippon Soken, Inc.Inventors: Atsuya Okamoto, Takeshi Mizobuchi, Takehiko Kato
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Publication number: 20070000476Abstract: A fuel injection valve for an engine includes a nozzle located in the vicinity of a cylinder head of the engine. The nozzle has nozzle holes each being opposed to an in-cylinder space defined in a cylinder of the engine. Each nozzle hole has an imaginary injection line that extends from each nozzle hole into the in-cylinder space. The imaginary injection line is directed toward either an upper surface of the piston or the wall surface of the cylinder. The in-cylinder space includes divided spaces each including the nozzle and at least one imaginary injection line. The divided spaces include a piston-side divided space and a head-side divided space. The head-side divided space contains fuel and air mixed at an air fuel ratio that is greater than an air fuel ratio of fuel and air in the piston-side divided space.Type: ApplicationFiled: July 5, 2006Publication date: January 4, 2007Applicants: Denso Corporation, Nippon Soken, Inc.Inventors: Takeshi Mizobuchi, Kimitaka Saito, Norio Yamamoto, Zhenzhou Su, Masatoshi Basaki, Masao Sawamura
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Publication number: 20060202063Abstract: In an injection hole plate of a fuel injection apparatus, a second-side hole section of each injection hole extends from a downstream end of a base wall of the injection hole plate and is communicated with first-side hole sections, which extends from an upstream end of the wall of the injection hole plate to an axially intermediate point of the wall. The first-side hole sections may discharge fuel into the second-side hole section in a manner that forms a swirl fuel flow in the second-side hole section. The injection hole plate may includes a collision portion, in which fuel flows supplied from the first-side hole sections collide with one another.Type: ApplicationFiled: May 18, 2006Publication date: September 14, 2006Inventors: Atsuya Okamoto, Takeshi Mizobuchi, Nobuo Ota, Kouichi Mochizuki, Takehiko Kato
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Patent number: 6994279Abstract: In an injection hole plate of a fuel injection device, injection holes are arranged about a circle. Fuel injected from the injection holes forms a flat sector-shaped spray. The intervals between adjacent injection holes are approximately equal to each other, while the diameters of the injection holes are equal to each other. An injection hole is positioned on an imaginary plane, which contains the central axis of the sector-shaped spray along the injection direction and is orthogonal or approximately orthogonal to the sector-shaped spray. The injection holes, away from the imaginary plane in this order, are symmetric with respect to the line of intersection of the injection hole plate and the imaginary plane. The farther each injection hole is away from the imaginary plane, the larger an angle of gradient of the injection hole with respect to the imaginary plane becomes.Type: GrantFiled: June 16, 2003Date of Patent: February 7, 2006Assignee: Denso CorporationInventors: Kimitaka Saito, Yasuhide Tani, Atsuya Okamoto, Takeshi Mizobuchi
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Publication number: 20040104285Abstract: In an injection hole plate of a fuel injection apparatus, a second-side hole section of each injection hole extends from a downstream end of a base wall of the injection hole plate and is communicated with first-side hole sections, which extends from an upstream end of the wall of the injection hole plate to an axially intermediate point of the wall. The first-side hole sections may discharge fuel into the second-side hole section in a manner that forms a swirl fuel flow in the second-side hole section. The injection hole plate may includes a collision portion, in which fuel flows supplied from the first-side hole sections collide with one another.Type: ApplicationFiled: November 26, 2003Publication date: June 3, 2004Applicant: DENSO CORPORATION and NIPPON SOKEN, INC.Inventors: Atsuya Okamoto, Takeshi Mizobuchi, Nobuo Ota, Kouichi Mochizuki, Takehiko Kato
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Publication number: 20030234006Abstract: In an injection hole plate of a fuel injection device, injection holes are arranged about a circle. Fuel injected from the injection holes forms a flat sector-shaped spray. The intervals between adjacent injection holes are approximately equal to each other, while the diameters of the injection holes are equal to each other. An injection hole is positioned on an imaginary plane, which contains the central axis of the sector-shaped spray along the injection direction and is orthogonal or approximately orthogonal to the sector-shaped spray. The injection holes, away from the imaginary plane in this order, are symmetric with respect to the line of intersection of the injection hole plate and the imaginary plane. The farther each injection hole is away from the imaginary plane, the larger an angle of gradient of the injection hole with respect to the imaginary plane becomes.Type: ApplicationFiled: June 16, 2003Publication date: December 25, 2003Inventors: Kimitaka Saito, Yasuhide Tani, Atsuya Okamoto, Takeshi Mizobuchi
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Patent number: 6210641Abstract: An air-fuel ratio control system for a gas-fueled engine which is capable of achieving the combustion in a target air-fuel ratio to surely purify an exhaust gas through an exhaust purification catalyst. In the air-fuel ratio control system, a three-way catalytic converter is placed in an exhaust pipe of the engine and an O2 sensor is located on the upstream side of the three-way catalytic converter. The O2 sensor comprises an element, and an atmosphere side electrode is formed on an inner surface of the element while an exhaust gas side electrode is formed on an outer surface thereof. The exhaust gas side electrode is coated with a catalyst layer which can remove hydrogen through a catalytic reaction. A control unit of the control system controls a fuel supply quantity by a gas injector using a feedback correction coefficient on the basis of the output of the O2 sensor, thereby reducing the deviation between an air-fuel ratio measured by the O2 sensor and a target air-fuel ratio.Type: GrantFiled: July 9, 1998Date of Patent: April 3, 2001Assignees: Denso Corporation, Nippon Soken, Inc.Inventors: Jun Yamada, Kenji Kanehara, Motomasa Iizuka, Takeshi Mizobuchi, Hidetaka Hayashi, Kouhei Yamada, Isao Watanabe, Takahiko Kuroda