Patents by Inventor Takashi Okamoto
Takashi Okamoto 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: 10233799Abstract: An engine control device sets a target value for the engine oil temperature appropriately in an engine that uses gasoline as a fuel, even when the fuel does not have a single boiling point because the gasoline is a mixed composition, or when the fuel property changes (for example, when the vaporization property changes due to deterioration). In other words, the engine control device prevents excessive heating or insufficient heating by changing the oil temperature to the high side in a condition wherein the fuel being used does not easily vaporize, and changing the oil temperature to the low side in a condition wherein the fuel being used easily vaporizes. This engine control device includes an oil temperature controller that controls the temperature of oil lubricating the interior of the engine; a fuel supply device that supplies fuel to the engine; and a detector for detecting the property of the fuel. The temperature of the oil is controlled on the basis of a signal from the detector.Type: GrantFiled: January 7, 2015Date of Patent: March 19, 2019Assignee: Hitachi Automotive Systems, Ltd.Inventors: Kenichiroh Ogata, Takashi Okamoto, Yoshinobu Arihara, Yoshihiro Sukegawa
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Patent number: 10227935Abstract: The purpose of the present invention is to provide an engine control system that is capable of promoting mixing of fuel and air during exhaust gas recirculation, thereby suppressing combustion fluctuation of a gasoline engine, such that efficiency and exhaust gas purification can be simultaneously achieved. The engine control system controls an engine and is equipped with an injection device for injecting fuel directly into a cylinder and a recirculation device for recirculating exhaust gas to the intake side.Type: GrantFiled: January 7, 2015Date of Patent: March 12, 2019Assignee: Hitachi Autmotive Systems, Ltd.Inventors: Kenichiroh Ogata, Takashi Okamoto, Yoshinobu Arihara
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Publication number: 20190055139Abstract: Provided is a flowing-water sterilization system that includes a flow channel for passing seawater to be sterilized, and a light source emitting ultraviolet light to irradiate the seawater passing through the flow channel, wherein the light source includes a light-emitting diode that emits light not including infrared light. The light-emitting diode may emit ultraviolet light that has a wavelength of not less than 250 nm and not more than 350 nm and does not include light with a wavelength of not more than 200 nm. The system may further include a cooling unit for cooling the light source.Type: ApplicationFiled: August 10, 2018Publication date: February 21, 2019Applicant: NIKKISO CO., LTD.Inventors: Tetsumi OCHI, Shinya WATANABE, Jin TAKANO, Takashi OKAMOTO
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Publication number: 20180291833Abstract: The purpose of the present invention is to provide a control device for an internal combustion engine with which it is possible to favorably control an engine even if there could occur a difference in temperatures of fuel injected into respective cylinders. The present invention is a control device for an internal combustion engine, for controlling an internal combustion engine provided with fuel injection valves for directly injecting fuel respectively to a plurality of cylinders, wherein: the control device is provided with a fuel temperature acquiring means for acquiring respective temperatures of fuel injected to each of the cylinders; and at least one of a fuel injection valve control amount, ignition control amount, and intake and exhaust valve control amount of each of the cylinders is set in accordance with the respective temperatures of fuel acquired by the fuel temperature acquiring means.Type: ApplicationFiled: November 25, 2015Publication date: October 11, 2018Inventors: Yoshihiro SUKEGAWA, Takashi OKAMOTO
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Publication number: 20170342935Abstract: Provided is a high-pressure fuel supply device for an internal combustion engine, said device being capable of suppressing noise from collisions of a plunger rod and an air intake valve. A high-pressure fuel pump 108 comprises an intake valve, a plunger rod that is formed as a separate element from the intake valve, an elastic member that biases the plunger rod in the valve-opening direction of the intake valve, and a solenoid that draws the plunger rod in the valve-closing direction of the intake valve when supplied with electricity. A control device 101 has a first control unit that applies a first current to the solenoid in order to close the intake valve, and a second control unit that applies a second current to the solenoid before the plunger rod collides with the intake valve due to the biasing force of the elastic member.Type: ApplicationFiled: January 12, 2016Publication date: November 30, 2017Inventors: Yoshinobu ARIHARA, Takashi OKAMOTO
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Publication number: 20170314500Abstract: The purpose of the present invention is to provide an engine control device with which it is possible to minimize decreases in combustion speed even when the EGR rate has been increased.Type: ApplicationFiled: September 16, 2015Publication date: November 2, 2017Inventors: Kenichiroh OGATA, Takashi OKAMOTO, Yoshinobu ARIHARA, Kazuhiro ORYOJI, Yoshihiro SUKEGAWA, Yuusuke KIHARA
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Publication number: 20170218876Abstract: A method for detecting variations between the quantities of fuel injected into cylinders by fuel injection devices and correcting the fuel injection quantity variation while minimizing the computational load on a drive device and the level of performance required of a pressure sensor includes a drive device for fuel injection control, wherein movable valves are driven so that predetermined quantities of fuel are injected by applying, for the duration of a set energization time, a current that will reach an energization current to solenoids of a plurality of fuel injection devices which open/close fuel flow paths. The drive device is characterized in that the set energization time or energization current is corrected on the basis of a pressure detection value from a pressure sensor that is attached to a fuel supply pipe disposed upstream of the plurality of fuel injection devices.Type: ApplicationFiled: April 22, 2015Publication date: August 3, 2017Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Ryo KUSAKABE, Motoyuki ABE, Toshihiro AONO, Takashi OKAMOTO
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Publication number: 20170074178Abstract: The purpose of the present invention is to provide an engine control system that is capable of promoting mixing of fuel and air during exhaust gas recirculation, thereby suppressing combustion fluctuation of a gasoline engine, such that efficiency and exhaust gas purification can be simultaneously achieved. The engine control system controls an engine and is equipped with an injection device for injecting fuel directly into a cylinder and a recirculation device for recirculating exhaust gas to the intake side.Type: ApplicationFiled: January 7, 2015Publication date: March 16, 2017Inventors: Kenichiroh OGATA, Takashi OKAMOTO, Yoshinobu ARIHARA
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Publication number: 20170009621Abstract: An engine control device sets a target value for the engine oil temperature appropriately in an engine that uses gasoline as a fuel, even when the fuel does not have a single boiling point because the gasoline is a mixed composition, or when the fuel property changes (for example, when the vaporization property changes due to deterioration). In other words, the engine control device prevents excessive heating or insufficient heating by changing the oil temperature to the high side in a condition wherein the fuel being used does not easily vaporize, and changing the oil temperature to the low side in a condition wherein the fuel being used easily vaporizes. This engine control device includes an oil temperature controller that controls the temperature of oil lubricating the interior of the engine; a fuel supply device that supplies fuel to the engine; and a detector for detecting the property of the fuel. The temperature of the oil is controlled on the basis of a signal from the detector.Type: ApplicationFiled: January 7, 2015Publication date: January 12, 2017Inventors: Kenichiroh OGATA, Takashi OKAMOTO, Yoshinobu ARIHARA, Yoshihiro SUKEGAWA
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Patent number: 9494098Abstract: Although a method for changing a combustion method taking place in an internal combustion engine depending on running condition is proposed, it can be considered that conditions under which a combustion noise occurs naturally differ with different methods. A detection method of prior art is not compatible with different combustion methods and the accuracy of combustion noise detection was low. Accurate combustion noise detection is enabled by identifying a combustion mode taking place in the internal combustion engine, selecting a sensed frequency or frequency band of a combustion noise sensor that detects a combustion noise in a combustion chamber of the internal combustion engine according to the combustion mode, and detecting a combustion noise.Type: GrantFiled: July 26, 2012Date of Patent: November 15, 2016Assignee: Hitachi Automotive Systems, Ltd.Inventors: Kenichiroh Ogata, Daisuke Watanabe, Takashi Okamoto
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Publication number: 20160237937Abstract: An object of the invention is to provide a drive device of a fuel injection device which can increase the accuracy in an injected fuel injection amount by combining the fuel injections from a plurality of injection pulse widths. In the drive device of the fuel injection device which has a function of driving the fuel injection device such that the fuel injection is performed plural times in one combustion cycle, the fuel injection device is driven such that a fuel injection at a target opening level in which a valve element or a movable element of the fuel injection device reaches a regulation member and a fuel injection at an intermediate opening level in which the valve element does not reach the regulation member are included in the plural times of division injections performed in one combustion cycle.Type: ApplicationFiled: June 16, 2014Publication date: August 18, 2016Inventors: Ryo KUSAKABE, Toshihiro AONO, Motoyuki ABE, Takuya MAYUZUMI, Masahiro TOYOHARA, Takashi OKAMOTO, Osamu MUKAIHARA, Shinji NAKAGAWA, Yusuke KIHARA
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Publication number: 20160229816Abstract: This invention relates to a cyanotriazole compound represented by the formula (1): wherein each symbols are defined in the specification, or a salt thereof. The compound or a salt thereof stimulates the citric acid cycle activity and/or improves hyperglycemia with less side effects, and excellent safety, and therefore, it is useful for treating and/or preventing diseases or disorders on which citric acid cycle activation and/or improvement of hyperglycemia has a prophylactic and/or therapeutic effect, for example, diabetes, impaired glucose tolerance, insulin resistance, diabetic complications, obesity, dyslipidemia, hepatic steatosis, atherosclerosis and/or cardiovascular disease, as well as diseases or disorders that would benefit from stimulating energy expenditure.Type: ApplicationFiled: July 16, 2014Publication date: August 11, 2016Applicant: OTSUKA PHARMACEUTICAL CO., LTD.Inventors: Seiji SATO, Satoshi MATSUDA, Chiharu MATSUMURA, Motohire ITOTANI, Toshio SHINOHARA, Shigekazu FUJITA, Yohji SAKURAI, Kuninori TAI, Tae FUKUSHIMA, Naohide KANEMOTO, Takashi OKAMOTO
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Patent number: 9371813Abstract: Provided is a control device of a direct injection engine, the control device that can prevent the amount of emission of soot from increasing and the exhaust performance from worsening when a restart request is made before an engine is stopped after an idle stop condition is satisfied. When a restart request is made before an engine is stopped after an idle stop condition is satisfied, at least one of the number of fuel injections in one combustion cycle and the air/fuel ratio of an air fuel mixture used for combustion is changed for each cylinder according to a piston position at that time.Type: GrantFiled: June 28, 2012Date of Patent: June 21, 2016Assignee: Hitachi Automotive Systems, Ltd.Inventors: Takashi Okamoto, Yoshinobu Arihara, Takao Miyake
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Patent number: 9151655Abstract: An oil level gauge structure with an oil level gauge attachment hole functioning as an oil filling opening provided in a casing of an engine with an oil level gauge for closing up the attachment hole. The oil level gauge has a columnar portion formed on the lower end side of an external thread. The columnar portion has a predetermined length and is continuous with the external thread for attaching the oil level gauge to the casing. A guide hole into which the columnar portion is fitted to restrict the position of the columnar portion is provided on the lower end side of an internal thread of an attachment hole of the casing. The columnar portion of the oil level gauge is formed to have such an axial length that the lower end of the columnar portion exceeds the depth of the internal thread of the casing.Type: GrantFiled: March 19, 2013Date of Patent: October 6, 2015Assignee: HONDA MOTOR CO., LTD.Inventors: Rei Sasaki, Takashi Okamoto
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Patent number: 9067270Abstract: A heat exchanger comprises a first plate and a second plate. A coolant flow passage is formed by brazing the first plate and the second plate by use of a first brazing filler metal. A pipe is brazed between a first groove portion provided in the first plate and a second groove portion provided in the second plate by use of a second brazing filler metal. A pair of first flanges provided contiguously with the first groove portion. Each of the first flanges includes an inner surface. A pair of second flanges provided contiguously with the second groove portion. Each of the second flanges includes an inner surface. At least one of the inner surfaces of the first flanges and the inner surfaces of the second flanges is covered with the second brazing filler metal. The first and second flanges are held by jigs upon brazing of the pipe.Type: GrantFiled: March 23, 2012Date of Patent: June 30, 2015Assignees: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI, SHOWA DENKO K.K.Inventors: Takashi Okamoto, Tomoya Hirano
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Publication number: 20150174605Abstract: A film forming device includes: a microwave supplying unit configured to supply microwave pulses to generate plasma along a processing surface of a workpiece material; an applying unit configured to apply negative bias voltage pulses to spread a sheath layer along the processing surface of the workpiece material, and a control unit configured to control an applying timing of the negative bias voltage pulses and a supplying timing of the microwave pulses, wherein the control unit is configured to control the applying timing of the negative bias voltage pulses and the supplying timing of the microwave pulses so that a ratio of an applying time period of one negative bias voltage pulse in a supplying time period of one microwave pulse to the supplying time period of one microwave pulse is equal to or greater than 0.9.Type: ApplicationFiled: March 4, 2015Publication date: June 25, 2015Applicants: NATIONAL UNIVERSITY CORPORATION NAGOYA UNIVERSITY, BROTHER KOGYO KABUSHIKI KAISHAInventors: Kentaro SHINODA, Hideki KANADA, Kazunari TAKI, Hiroyuki KOUSAKA, Yasuyuki TAKAOKA, Takashi OKAMOTO
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Patent number: 9010302Abstract: In a direct injection gasoline engine, at acceleration operation, an amount of internal EGR is increased by advancing exhaust valve closing timing, and also fuel injection pressure is increased. In this case, range of increase in fuel injection pressure is determined on the basis of the exhaust valve closing timing at present.Type: GrantFiled: September 15, 2011Date of Patent: April 21, 2015Assignee: Hitachi Automotive Systems, Ltd.Inventors: Kengo Kumano, Yoshihiro Sukegawa, Yusuke Kihara, Takashi Okamoto
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Publication number: 20140377684Abstract: The present invention provides a fuel electrode doubling as a support of a solid oxide fuel cell that hardly deteriorates conductivity and strength thereof through repetitive exposure to reducing atmosphere/oxidizing atmosphere. The fuel electrode doubling as the support of the solid oxide fuel cell according to the present invention includes: a porous structure formed of first oxide particles having a 10% cumulative particle diameter between 5 ?m and 12 ?m and a 90% cumulative particle diameter between 84 ?m and 101 ?m; and electrode particles having an electrode catalytic activity that cover a surface in a gap of the porous structure and have a surface covered with second oxide particles by 10% to 70%.Type: ApplicationFiled: July 17, 2013Publication date: December 25, 2014Applicant: Kabushiki Kaisha RikenInventor: Takashi Okamoto
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Publication number: 20140212791Abstract: An object of the present invention is to provide a fuel electrode doubling as a support of a solid oxide fuel cell, whose conductivity and strength hardly lower through repetitive exposure to a reducing atmosphere/oxidazing atmosphere. Specifically, a fuel electrode 30 doubling as a solid oxide fuel cell according to the present invention includes: a three-dimensional network structure 10 formed by oxide coarse particles 12 connected to one another via an aggregate 14; electrode particles 20 dispersed in gaps 16 of the three-dimensional network structure and having a function as an electrode catalyst; and an aggregate 22 of second oxide fine particles for connecting the electrode particles 20 to a surface in the gap of the three-dimensional network structure, wherein the oxide coarse particles 12 are connected to one another without the electrode particles 20.Type: ApplicationFiled: January 23, 2014Publication date: July 31, 2014Applicant: KABUSHIKI KAISHA RIKENInventor: Takashi OKAMOTO
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Patent number: 8783230Abstract: Disclosed is a fuel injection system that is used with an internal-combustion engine to reliably perform a requested fuel injection operation a requested number of times even when a boost voltage is lowered. The fuel injection system monitors the boost voltage immediately before the start of fuel injection, and varies a valve open time in accordance with the monitored boost voltage. Even when the boost voltage is lowered, the fuel injection system performs a fuel injection operation the requested number of times.Type: GrantFiled: February 24, 2011Date of Patent: July 22, 2014Assignee: Hitachi Automotive Systems, Ltd.Inventors: Atsushi Okonogi, Masahiro Toyohara, Takashi Okamoto, Motoyuki Abe, Takuya Mayuzumi